use SDL_arraysize() instead of sizeof() where appropriate

[taylor/freespace2.git] / src / network / multimsgs.cpp

/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on
 * the source.
 */

/*
 * $Logfile: /Freespace2/code/Network/MultiMsgs.cpp $
 * $Revision$
 * $Date$
 * $Author$
 *
 * C file that holds functions for the building and processing of multiplayer packets
 *
 * $Log$
 * Revision 1.11  2006/04/26 19:48:58  taylor
 * various big-endian fixes, mainly networking support related
 *
 * Revision 1.10  2005/10/02 09:30:10  taylor
 * sync up rest of big-endian network changes.  it should at least be as good as what's in FS2_Open now, only better :)
 *
 * Revision 1.9  2005/08/12 08:59:17  taylor
 * small endianess fix
 *
 * Revision 1.8  2004/09/20 01:31:44  theoddone33
 * GCC 3.4 fixes.
 *
 * Revision 1.7  2004/06/11 01:49:45  tigital
 * byte-swapping changes for bigendian systems
 *
 * Revision 1.6  2003/08/03 16:10:29  taylor
 * cleanup; compile warning fixes
 *
 * Revision 1.5  2002/06/17 06:33:10  relnev
 * ryan's struct patch for gcc 2.95
 *
 * Revision 1.4  2002/06/09 04:41:24  relnev
 * added copyright header
 *
 * Revision 1.3  2002/05/26 20:49:54  theoddone33
 * More progress
 *
 * Revision 1.2  2002/05/07 03:16:47  theoddone33
 * The Great Newline Fix
 *
 * Revision 1.1.1.1  2002/05/03 03:28:10  root
 * Initial import.
 *
 * 
 * 83    9/14/99 2:21p Dave
 * Fixed observer mode joining and ingame stuff.
 * 
 * 82    9/14/99 3:26a Dave
 * Fixed laser fogging problem in nebula (D3D)> Fixed multiplayer
 * respawn-too-early problem. Made a few crash points safe.
 * 
 * 81    9/13/99 4:52p Dave
 * RESPAWN FIX
 * 
 * 80    9/08/99 10:01p Dave
 * Make sure game won't run in a drive's root directory. Make sure
 * standalone routes suqad war messages properly to the host.
 * 
 * 79    8/28/99 4:54p Dave
 * Fixed directives display for multiplayer clients for wings with
 * multiple waves. Fixed hud threat indicator rendering color.
 * 
 * 78    8/27/99 12:32a Dave
 * Allow the user to specify a local port through the launcher.
 * 
 * 77    8/26/99 8:51p Dave
 * Gave multiplayer TvT messaging a heavy dose of sanity. Cheat codes.
 * 
 * 76    8/25/99 4:38p Dave
 * Updated PXO stuff. Make squad war report stuff much more nicely.
 * 
 * 75    8/24/99 1:50a Dave
 * Fixed client-side afterburner stuttering. Added checkbox for no version
 * checking on PXO join. Made button info passing more friendly between
 * client and server.
 * 
 * 74    8/22/99 5:53p Dave
 * Scoring fixes. Added self destruct key. Put callsigns in the logfile
 * instead of ship designations for multiplayer players.
 * 
 * 73    8/22/99 1:55p Dave
 * Cleaned up host/team-captain leaving code.
 * 
 * 72    8/22/99 1:19p Dave
 * Fixed up http proxy code. Cleaned up scoring code. Reverse the order in
 * which d3d cards are detected.
 * 
 * 71    8/19/99 10:59a Dave
 * Packet loss detection.
 * 
 * 70    8/17/99 1:12p Dave
 * Send TvT update when a client has finished joining so he stays nice and
 * synched.
 * 
 * 69    8/16/99 4:05p Dave
 * Big honking checkin.
 * 
 * 68    8/11/99 5:54p Dave
 * Fixed collision problem. Fixed standalone ghost problem.
 * 
 * 67    8/06/99 9:46p Dave
 * Hopefully final changes for the demo.
 * 
 * 66    8/05/99 2:06a Dave
 * Whee.
 * 
 * 65    7/30/99 7:01p Dave
 * Dogfight escort gauge. Fixed up laser rendering in Glide.
 * 
 * 64    7/29/99 5:41p Jefff
 * Sound hooks for cmeasure success
 * 
 * 63    7/28/99 5:34p Dave
 * Nailed the missing stats bug to the wall. Problem was optimized build
 * and using GET_DATA() with array elements. BLECH.
 * 
 * 62    7/26/99 5:50p Dave
 * Revised ingame join. Better? We'll see....
 * 
 * 61    7/24/99 1:54p Dave
 * Hud text flash gauge. Reworked dead popup to use 4 buttons in red-alert
 * missions.
 * 
 * 60    7/22/99 7:17p Dave
 * Fixed excessive whacks in multiplayer.
 * 
 * 59    7/08/99 10:53a Dave
 * New multiplayer interpolation scheme. Not 100% done yet, but still
 * better than the old way.
 * 
 * 58    7/03/99 5:50p Dave
 * Make rotated bitmaps draw properly in padlock views.
 * 
 * 57    7/03/99 4:08p Dave
 * Fixed wss_slots size issues. Fixed potentially nasty bug in low level
 * reliable code.
 * 
 * 56    6/21/99 7:24p Dave
 * netplayer pain packet. Added type E unmoving beams.
 * 
 * 55    6/18/99 5:16p Dave
 * Added real beam weapon lighting. Fixed beam weapon sounds. Added MOTD
 * dialog to PXO screen.
 * 
 * 54    6/16/99 4:06p Dave
 * New pilot info popup. Added new draw-bitmap-as-poly function.
 * 
 * 53    6/16/99 10:20a Dave
 * Added send-message-list sexpression.
 * 
 * 52    6/04/99 3:52p Anoop
 * Removed bogus assert.
 * 
 * 51    6/01/99 8:35p Dave
 * Finished lockarm weapons. Added proper supercap weapons/damage. Added
 * awacs-set-radius sexpression.
 * 
 * 50    5/21/99 5:03p Andsager
 * Add code to display engine wash death.  Modify ship_kill_packet
 * 
 * 49    5/18/99 1:30p Dave
 * Added muzzle flash table stuff.
 * 
 * 48    5/14/99 1:59p Andsager
 * Multiplayer message for subsystem cargo revealed.
 * 
 * 47    5/14/99 12:15p Andsager
 * Add vaporized to kill packet
 * 
 * 46    5/03/99 8:32p Dave
 * New version of multi host options screen.
 * 
 * 45    4/30/99 12:18p Dave
 * Several minor bug fixes.
 * 
 * 44    4/29/99 2:29p Dave
 * Made flak work much better in multiplayer.
 * 
 * 43    4/28/99 11:13p Dave
 * Temporary checkin of artillery code.
 * 
 * 42    4/16/99 5:54p Dave
 * Support for on/off style "stream" weapons. Real early support for
 * target-painting lasers.
 * 
 * 41    4/12/99 2:22p Dave
 * More checks for dogfight stats.
 * 
 * 40    4/09/99 2:21p Dave
 * Multiplayer beta stuff. CD checking.
 * 
 * 39    4/02/99 9:55a Dave
 * Added a few more options in the weapons.tbl for beam weapons. Attempt
 * at putting "pain" packets into multiplayer.
 * 
 * 38    4/01/99 3:41p Anoop
 * Removed bogus Int3().
 * 
 * 37    3/19/99 9:51a Dave
 * Checkin to repair massive source safe crash. Also added support for
 * pof-style nebulae, and some new weapons code.
 * 
 * 38    3/12/99 2:32p Anoop
 * Removed bogus asserts.
 * 
 * 37    3/11/99 11:41a Neilk
 * Don't do multi_io_* operations in single-player
 * 
 * 36    3/10/99 6:50p Dave
 * Changed the way we buffer packets for all clients. Optimized turret
 * fired packets. Did some weapon firing optimizations.
 * 
 * 35    3/09/99 6:24p Dave
 * More work on object update revamping. Identified several sources of
 * unnecessary bandwidth.
 * 
 * 34    3/08/99 7:03p Dave
 * First run of new object update system. Looks very promising.
 * 
 * 33    3/04/99 6:09p Dave
 * Added in sexpressions for firing beams and checking for if a ship is
 * tagged.
 * 
 * 32    3/01/99 10:00a Dave
 * Fxied several dogfight related stats bugs.
 * 
 * 31    2/24/99 2:25p Dave
 * Fixed up chatbox bugs. Made squad war reporting better. Fixed a respawn
 * bug for dogfight more.
 * 
 * 30    2/23/99 2:29p Dave
 * First run of oldschool dogfight mode. 
 * 
 * 29    2/21/99 6:01p Dave
 * Fixed standalone WSS packets. 
 * 
 * 28    2/21/99 1:48p Dave
 * Some code for monitoring datarate for multiplayer in detail.
 * 
 * 27    2/17/99 2:11p Dave
 * First full run of squad war. All freespace and tracker side stuff
 * works.
 * 
 * 26    2/12/99 6:16p Dave
 * Pre-mission Squad War code is 95% done.
 * 
 * 25    2/11/99 3:08p Dave
 * PXO refresh button. Very preliminary squad war support.
 * 
 * 24    1/29/99 5:07p Dave
 * Fixed multiplayer stuff. Put in multiplayer support for rapid fire
 * missiles.
 * 
 * 23    1/27/99 9:56a Dave
 * Temporary checkin of beam weapons for Dan to make cool sounds.
 * 
 * 22    1/26/99 6:33p Anoop
 * Fixed multiplayer slot switching problem (be sure to remember that
 * hinfo->id is player id# _not_ player index #)
 * 
 * 21    1/24/99 11:37p Dave
 * First full rev of beam weapons. Very customizable. Removed some bogus
 * Int3()'s in low level net code.
 * 
 * 20    1/15/99 4:37p Dave
 * Potential fix for weapon pair problem.
 * 
 * 19    1/14/99 6:06p Dave
 * 100% full squad logo support for single player and multiplayer.
 * 
 * 18    1/14/99 12:48a Dave
 * Todo list bug fixes. Made a pass at putting briefing icons back into
 * FRED. Sort of works :(
 * 
 * 17    1/12/99 5:45p Dave
 * Moved weapon pipeline in multiplayer to almost exclusively client side.
 * Very good results. Bandwidth goes down, playability goes up for crappy
 * connections. Fixed object update problem for ship subsystems.
 * 
 * 16    1/08/99 4:56p Anoop
 * Fixed a problem with wss request packets.
 * 
 * 15    12/18/98 12:24p Markm
 * Fixed a dumb bug where player image_filenames were not being passed
 * properly in new players packet.
 * 
 * 14    12/14/98 12:13p Dave
 * Spiffed up xfer system a bit. Put in support for squad logo file xfer.
 * Need to test now.
 * 
 * 13    11/30/98 1:07p Dave
 * 16 bit conversion, first run.
 * 
 * 12    11/20/98 4:08p Dave
 * Fixed flak effect in multiplayer.
 * 
 * 11    11/19/98 4:19p Dave
 * Put IPX sockets back in psnet. Consolidated all multiplayer config
 * files into one.
 * 
 * 10    11/19/98 8:04a Dave
 * Full support for D3-style reliable sockets. Revamped packet lag/loss
 * system, made it receiver side and at the lowest possible level.
 * 
 * 9     11/17/98 11:12a Dave
 * Removed player identification by address. Now assign explicit id #'s.
 * 
 * 8     11/12/98 11:50a Dave
 * Multiplayer clients set flak range to be very long.
 * 
 * 7     11/12/98 12:13a Dave
 * Tidied code up for multiplayer test. Put in network support for flak
 * guns.
 * 
 * 6     11/05/98 5:55p Dave
 * Big pass at reducing #includes
 * 
 * 5     10/20/98 1:39p Andsager
 * Make so sparks follow animated ship submodels.  Modify
 * ship_weapon_do_hit_stuff() and ship_apply_local_damage() to add
 * submodel_num.  Add submodel_num to multiplayer hit packet.
 * 
 * 4     10/13/98 9:29a Dave
 * Started neatening up freespace.h. Many variables renamed and
 * reorganized. Added AlphaColors.[h,cpp]
 * 
 * 3     10/07/98 6:27p Dave
 * Globalized mission and campaign file extensions. Removed Silent Threat
 * special code. Moved \cache \players and \multidata into the \data
 * directory.
 * 
 * 2     10/07/98 10:53a Dave
 * Initial checkin.
 * 
 * 1     10/07/98 10:50a Dave
 * 
 * 506   10/02/98 3:22p Allender
 * fix up the -connect option and fix the -port option
 * 
 * 505   10/02/98 11:45a Dave
 * Fixed stupid chat message bug.
 * 
 * 504   9/29/98 1:33p Dave
 * Remove standalone only conditional compiles for pre 1.04 stuff.
 * 
 * 503   9/28/98 1:54p Dave
 * Make sure French and German don't xfer builtin files they don't have
 * (to themselves)
 * 
 * 502   9/20/98 7:19p Dave
 * Added CHANGE_IFF packet. 
 * 
 * 501   9/17/98 3:08p Dave
 * PXO to non-pxo game warning popup. Player icon stuff in create and join
 * game screens. Upped server count refresh time in PXO to 35 secs (from
 * 20).
 * 
 * 
 * $NoKeywords: $
 */

#include <limits.h>
#ifndef PLAT_UNIX
#include <io.h>         // for findfirst/findnext, etc
#endif
#include "osapi.h"
#include "multimsgs.h"
#include "multiutil.h"
#include "multiui.h"
#include "multi.h"
#include "multiteamselect.h"
#include "linklist.h"
#include "gamesequence.h"
#include "hudmessage.h"
#include "hudsquadmsg.h"
#include "freespace.h"
#include "timer.h"
#include "psnet.h"
#include "player.h"
#include "missiongoals.h"
#include "missionparse.h"
#include "missionlog.h"
#include "missionmessage.h"
#include "missionbrief.h"
#include "physics.h"
#include "cmeasure.h"
#include "model.h"                              // for some limits
#include "afterburner.h"
#include "stand_gui.h"
#include "multi_xfer.h"
#include "gamesnd.h"
#include "sexp.h"
#include "shiphit.h"
#include "chatbox.h"
#include "3d.h"
#include "managepilot.h"
#include "hudsquadmsg.h"
#include "debris.h"
#include "missionweaponchoice.h"
#include "missionshipchoice.h"
#include "fireballs.h"
#include "shipfx.h"
#include "popup.h"
#include "multi_ingame.h"
#include "multiteamselect.h"
#include "aigoals.h"
#include "multi_campaign.h"
#include "multi_team.h"
#include "multi_respawn.h"
#include "multi_observer.h"
#include "multi_voice.h"
#include "asteroid.h"
#include "multi_pmsg.h"
#include "multi_data.h"
#include "multi_options.h"
#include "objcollide.h"
#include "hudreticle.h"
#include "multi_pause.h"
#include "multi_endgame.h"
#include "missiondebrief.h"
#include "multi_obj.h"
#include "multi_log.h"
#include "emp.h"
#include "multi_kick.h"
#include "cmdline.h"
#include "flak.h"
#include "beam.h"
#include "multi_rate.h"
#include "neblightning.h"
#include "hudescort.h"

// #define _MULTI_SUPER_WACKY_COMPRESSION

#ifdef _MULTI_SUPER_WACKY_COMPRESSION
#define BITS                       15
#define MAX_CODE                   ( ( 1 << BITS ) - 1 )
#define TABLE_SIZE                 35023L
#define END_OF_STREAM              256
#define BUMP_CODE                  257
#define FLUSH_CODE                 258
#define FIRST_CODE                 259
#define UNUSED                     -1

typedef struct {
    int code_value;
    int parent_code;
    char character;
} DICTIONARY;

static DICTIONARY dict[TABLE_SIZE];
static char decode_stack[TABLE_SIZE];
static uint next_code;
static int current_code_bits;
static uint next_bump_code;

typedef struct BitBuf {
        ubyte   mask;
   int  rack;
        ubyte *data;
} BitBuf;

void output_bits( BitBuf *bitbuf, uint code, int count ) 
{
    uint mask;

    mask = 1L << ( count - 1 );
    while ( mask != 0) {
        if ( mask & code )
            bitbuf->rack |= bitbuf->mask;
        bitbuf->mask >>= 1;
        if ( bitbuf->mask == 0 ) {
                                *bitbuf->data++=(ubyte)bitbuf->rack;
                                bitbuf->rack = 0;
            bitbuf->mask = 0x80;
        }
        mask >>= 1;
    }
}

uint input_bits( BitBuf *bitbuf, int bit_count ) 
{
        uint mask;
        uint return_value;

        mask = 1L << ( bit_count - 1 );
        return_value = 0;
        while ( mask != 0)      {
                if ( bitbuf->mask == 0x80 ) {
                        bitbuf->rack = *bitbuf->data++;
                        if ( bitbuf->rack == EOF ) 
                                return END_OF_STREAM;
        }
                if ( bitbuf->rack & bitbuf->mask )
                        return_value |= mask;
                mask >>= 1;
                bitbuf->mask >>= 1;
                if ( bitbuf->mask == 0 )
                        bitbuf->mask = 0x80;
        }
        return( return_value );
}


static void InitializeDictionary()
{
        uint i;

        for ( i = 0 ; i < TABLE_SIZE ; i++ )
                dict[i].code_value = UNUSED;

        next_code = FIRST_CODE;
        current_code_bits = 9;
        next_bump_code = 511;

}

static uint find_child_node( int parent_code, int child_character ) 
{
    uint index;
    int offset;

    index = ( child_character << ( BITS - 8 ) ) ^ parent_code;
    if ( index == 0 )
        offset = 1;
    else
        offset = TABLE_SIZE - index;
    for ( ; ; ) {
                if ( dict[ index ].code_value == UNUSED )
            return( (uint) index );
                if ( dict[ index ].parent_code == parent_code &&
                         dict[ index ].character == (char) child_character )
            return( index );
        if ( (int) index >= offset )
            index -= offset;
        else
            index += TABLE_SIZE - offset;
    }
}


static uint decode_string( uint count, uint code ) 
{
    while ( code > 255 ) {
                decode_stack[ count++ ] = dict[ code ].character;
                code = dict[ code ].parent_code;
    }
    decode_stack[ count++ ] = (char) code;
    return( count );
}

int lzw_compress( ubyte *outputbuf, ubyte *inputbuf, int input_size ) 
{
        BitBuf output;
        int character;
        int string_code;
        uint index;
        int i;

        // Init output bit buffer
        output.rack = 0;
        output.mask = 0x80;
        output.data = outputbuf;

        InitializeDictionary();

        string_code = *inputbuf++;

        for ( i=1 ; i<input_size ; i++ ) {
                character = *inputbuf++;
                index = find_child_node( string_code, character );
                if ( dict[ index ].code_value != - 1 )
                        string_code = dict[ index ].code_value;
      else {
                        dict[ index ].code_value = next_code++;
                        dict[ index ].parent_code = string_code;
                        dict[ index ].character = (char) character;
                        output_bits( &output, (unsigned long) string_code, current_code_bits );
                        string_code = character;
         if ( next_code > MAX_CODE ) {
                                output_bits( &output, (unsigned long) FLUSH_CODE, current_code_bits );
                                InitializeDictionary();
                        } else if ( next_code > next_bump_code ) {
                output_bits( &output, (unsigned long) BUMP_CODE, current_code_bits );
                                current_code_bits++;
                                next_bump_code <<= 1;
                                next_bump_code |= 1;
                        }
                }
        }
        output_bits( &output, (unsigned long) string_code, current_code_bits );
        output_bits( &output, (unsigned long) END_OF_STREAM, current_code_bits);

        if ( output.mask != 0x80 )
        *output.data++ = (ubyte)output.rack;

        return output.data-outputbuf;
}


int lzw_expand( ubyte *outputbuf, ubyte *inputbuf ) 
{
        BitBuf input;
        uint new_code;
        uint old_code;
        int character;
        uint count;
        uint counter;

        input.rack = 0; 
        input.mask = 0x80;
        input.data = inputbuf;
        
        counter = 0;
        for ( ; ; ) {
                InitializeDictionary();
                old_code = (uint) input_bits( &input, current_code_bits );
                if ( old_code == END_OF_STREAM ) 
                        return counter;
                character = old_code;
                outputbuf[counter++] = ( ubyte )old_code;
                for ( ; ; ) {
                        new_code = (uint) input_bits( &input, current_code_bits );
                        if ( new_code == END_OF_STREAM ) 
                                return counter;
                        if ( new_code == FLUSH_CODE )
                                break;
                        if ( new_code == BUMP_CODE ) {
                                current_code_bits++;
                                continue;
                        }
                        if ( new_code >= next_code ) {
                                decode_stack[ 0 ] = (char) character;
                                count = decode_string( 1, old_code );
                        } else {
                                count = decode_string( 0, new_code );
                        }
                        character = decode_stack[ count - 1 ];
                        while ( count > 0 )
                                outputbuf[counter++] = ( ubyte )decode_stack[ --count ];
                        dict[ next_code ].parent_code = old_code;
                        dict[ next_code ].character = (char) character;
                        next_code++;
                        old_code = new_code;
                }
        }
}
#endif

// process a join request packet add
void add_join_request(ubyte *data, int *size, join_request *jr)
{
        int packet_size = *size;
        join_request *jr_tmp = jr;

        jr_tmp->tracker_id = INTEL_INT(jr->tracker_id);
        jr_tmp->player_options.flags = INTEL_INT(jr->player_options.flags);
        jr_tmp->player_options.obj_update_level = INTEL_INT(jr->player_options.obj_update_level);

        ADD_DATA(*jr_tmp);

        *size = packet_size;
}

// process a join request packet get
void get_join_request(ubyte *data, int *size, join_request jr)
{
        int offset = *size;

        GET_DATA(jr);

        jr.tracker_id = INTEL_INT(jr.tracker_id);
        jr.player_options.flags = INTEL_INT(jr.player_options.flags);
        jr.player_options.obj_update_level = INTEL_INT(jr.player_options.obj_update_level);

        *size = offset;
}

void add_net_addr(ubyte *data, int *size, net_addr addr)
{
        int packet_size = *size;
        net_addr addr_tmp = addr;

        addr_tmp.type = INTEL_INT(addr.type);
        addr_tmp.port = INTEL_SHORT(addr.port);

        ADD_DATA(addr_tmp);

        *size = packet_size;
}

void get_net_addr(ubyte *data, int *size, net_addr addr)
{
        int offset = *size;

        GET_DATA(addr);

        addr.type = INTEL_INT(addr.type);
        addr.port = INTEL_SHORT(addr.port);

        *size = offset;
}

void add_vector_data(ubyte *data, int *size, vector vec)
{
        int packet_size = *size;

        ADD_FLOAT(vec.xyz.x);
        ADD_FLOAT(vec.xyz.y);
        ADD_FLOAT(vec.xyz.z);

        *size = packet_size;
}

void get_vector_data(ubyte *data, int *size, vector vec)
{
        int offset = *size;

        GET_FLOAT(vec.xyz.x);
        GET_FLOAT(vec.xyz.y);
        GET_FLOAT(vec.xyz.z);

        *size = offset;
}

// send the specified data packet to all players
void multi_io_send(net_player *pl, ubyte *data, int len)
{               
        // invalid
        if((pl == NULL) || (NET_PLAYER_NUM(pl) >= MAX_PLAYERS)){
                return;
        }

        // don't do it for single player
        if(!(Game_mode & GM_MULTIPLAYER)){
                return;
        }

        // sanity checks
        if(MULTIPLAYER_CLIENT){
                // SDL_assert(pl == Net_player);
                if(pl != Net_player){
                        return;
                }
        } else {
                // SDL_assert(pl != Net_player);
                if(pl == Net_player){
                        return;
                }
        }

        // If this packet will push the buffer over MAX_PACKET_SIZE, send the current send_buffer
        if ((pl->s_info.unreliable_buffer_size + len) > MAX_PACKET_SIZE) {              
                multi_io_send_force(pl);
                pl->s_info.unreliable_buffer_size = 0;
        }

        SDL_assert((pl->s_info.unreliable_buffer_size + len) <= MAX_PACKET_SIZE);

        memcpy(pl->s_info.unreliable_buffer + pl->s_info.unreliable_buffer_size, data, len);
        pl->s_info.unreliable_buffer_size += len;
}

void multi_io_send_to_all(ubyte *data, int length, net_player *ignore)
{       
        int i;
        SDL_assert(MULTIPLAYER_MASTER);

        // need to check for i > 1, hmmm... and connected. I don't know.        
        for (i = 0; i < MAX_PLAYERS; i++ ) {
                if ( !MULTI_CONNECTED(Net_players[i]) || (Net_player == &Net_players[i])){
                        continue;
                }

                // maybe ignore a player
                if((ignore != NULL) && (&Net_players[i] == ignore)){
                        continue;
                }

                // ingame joiners not waiting to select a ship doesn't get any packets
                if ( (Net_players[i].flags & NETINFO_FLAG_INGAME_JOIN) && !(Net_players[i].flags & INGAME_JOIN_FLAG_PICK_SHIP) ){
                        continue;
                }

                // send it
                multi_io_send(&Net_players[i], data, length);
   }
}

void multi_io_send_force(net_player *pl)
{       
        // invalid
        if((pl == NULL) || (NET_PLAYER_NUM(pl) >= MAX_PLAYERS)){
                return;
        }
        
        // don't do it for single player
        if(!(Game_mode & GM_MULTIPLAYER)){
                return;
        }

        // send everything in 
        if (MULTIPLAYER_MASTER) {
                psnet_send(&pl->p_info.addr, pl->s_info.unreliable_buffer, pl->s_info.unreliable_buffer_size, NET_PLAYER_NUM(pl));

                // add the bytes sent to this player
                pl->sv_bytes_sent += pl->s_info.unreliable_buffer_size;
        } else {
                psnet_send(&Netgame.server_addr, pl->s_info.unreliable_buffer, pl->s_info.unreliable_buffer_size, NET_PLAYER_NUM(pl));          
        }               
        pl->s_info.unreliable_buffer_size = 0;
}

// send the data packet to all players via their reliable sockets
void multi_io_send_reliable(net_player *pl, ubyte *data, int len)
{       
        // invalid
        if((pl == NULL) || (NET_PLAYER_NUM(pl) >= MAX_PLAYERS)){
                return;
        }

        // don't do it for single player
        if(!(Game_mode & GM_MULTIPLAYER)){
                return;
        }
        
        // sanity checks
        if(MULTIPLAYER_CLIENT){
                // SDL_assert(pl == Net_player);
                if(pl != Net_player){
                        return;
                }
        } else {
                // SDL_assert(pl != Net_player);
                if(pl == Net_player){
                        return;
                }
        }

        // If this packet will push the buffer over MAX_PACKET_SIZE, send the current send_buffer
        if ((pl->s_info.reliable_buffer_size + len) > MAX_PACKET_SIZE) {                
                multi_io_send_reliable_force(pl);
                pl->s_info.reliable_buffer_size = 0;
        }

        SDL_assert((pl->s_info.reliable_buffer_size + len) <= MAX_PACKET_SIZE);

        memcpy(pl->s_info.reliable_buffer + pl->s_info.reliable_buffer_size, data, len);
        pl->s_info.reliable_buffer_size += len;
}

void multi_io_send_to_all_reliable(ubyte* data, int length, net_player *ignore)
{       
        int i;
        SDL_assert(MULTIPLAYER_MASTER);

        // need to check for i > 1, hmmm... and connected. I don't know.        
        for (i = 0; i < MAX_PLAYERS; i++ ) {
                if ( !MULTI_CONNECTED(Net_players[i]) || (Net_player == &Net_players[i])){
                        continue;
                }

                // maybe ignore a player
                if((ignore != NULL) && (&Net_players[i] == ignore)){
                        continue;
                }

                // ingame joiners not waiting to select a ship doesn't get any packets
                if ( (Net_players[i].flags & NETINFO_FLAG_INGAME_JOIN) && !(Net_players[i].flags & INGAME_JOIN_FLAG_PICK_SHIP) ){
                        continue;
                }

                // send it
                multi_io_send_reliable(&Net_players[i], data, length);
   }
}

void multi_io_send_reliable_force(net_player *pl)
{       
        // invalid
        if((pl == NULL) || (NET_PLAYER_NUM(pl) >= MAX_PLAYERS)){
                return;
        }               

        // don't do it for single player
        if(!(Game_mode & GM_MULTIPLAYER)){
                return;
        }

        // send everything in 
        if(MULTIPLAYER_MASTER) {
                psnet_rel_send(pl->reliable_socket, pl->s_info.reliable_buffer, pl->s_info.reliable_buffer_size, NET_PLAYER_NUM(pl));
        } else if(Net_player != NULL){
                psnet_rel_send(Net_player->reliable_socket, pl->s_info.reliable_buffer, pl->s_info.reliable_buffer_size, NET_PLAYER_NUM(pl));
        }               
        pl->s_info.reliable_buffer_size = 0;
}

// send all buffered packets
void multi_io_send_buffered_packets()   
{
        int idx;

        // don't do it for single player
        if(!(Game_mode & GM_MULTIPLAYER)){
                return;
        }

        // server
        if(MULTIPLAYER_MASTER){
                for(idx=0; idx<MAX_PLAYERS; idx++){
                        if(MULTI_CONNECTED(Net_players[idx]) && (Net_player != &Net_players[idx])){
                                // force unreliable data
                                if(Net_players[idx].s_info.unreliable_buffer_size > 0){
                                        multi_io_send_force(&Net_players[idx]);
                                        Net_players[idx].s_info.unreliable_buffer_size = 0;
                                }

                                // force reliable data
                                if(Net_players[idx].s_info.reliable_buffer_size > 0){
                                        multi_io_send_reliable_force(&Net_players[idx]);
                                        Net_players[idx].s_info.reliable_buffer_size = 0;
                                }
                        }
                }
        } 
        // clients
        else if(Net_player != NULL){
                // force unreliable data
                if(Net_player->s_info.unreliable_buffer_size > 0){
                        multi_io_send_force(Net_player);
                        Net_player->s_info.unreliable_buffer_size = 0;
                }

                // force reliable data
                if(Net_player->s_info.reliable_buffer_size > 0){
                        multi_io_send_reliable_force(Net_player);
                        Net_player->s_info.reliable_buffer_size = 0;
                }
        }
}

// send a general game chat packet (if msg_mode == MULTI_MSG_TARGET, need to pass in "to", if == MULTI_MSG_EXPR, need to pass in expr)
void send_game_chat_packet(net_player *from, const char *msg, int msg_mode, net_player *to, const char *expr, int server_msg)
{
        ubyte data[MAX_PACKET_SIZE],mode;
        int packet_size,idx;
        
        BUILD_HEADER(GAME_CHAT);
        
        // add the id
        ADD_SHORT(from->player_id);

        // add the message mode and if in MSG_TARGET mode, add who the target is
        ADD_INT(server_msg);
        mode = (ubyte)msg_mode; 
        ADD_DATA(mode);
        switch(mode){
        case MULTI_MSG_TARGET:  
                SDL_assert(to != NULL);
                ADD_SHORT(to->player_id);
                break;
        case MULTI_MSG_EXPR:
                SDL_assert(expr != NULL);
                ADD_STRING(expr);
                break;
        }
        // add the message itself
        ADD_STRING( msg );
        
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                switch(mode){
                // message all players
                case MULTI_MSG_ALL:                     
                        for(idx=0;idx<MAX_PLAYERS;idx++){
                                if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && (&Net_players[idx] != from)){                                    
                                        multi_io_send_reliable(&Net_players[idx], data, packet_size);
                                }
                        }
                        break;

                // message only friendly players
                case MULTI_MSG_FRIENDLY:
                        for(idx=0;idx<MAX_PLAYERS;idx++){
                                if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && (&Net_players[idx] != from) && (Net_players[idx].p_info.team == from->p_info.team)){                                     
                                        multi_io_send_reliable(&Net_players[idx], data, packet_size);
                                }
                        }
                        break;

                // message only hostile players
                case MULTI_MSG_HOSTILE:
                        for(idx=0;idx<MAX_PLAYERS;idx++){
                                if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && (&Net_players[idx] != from) && (Net_players[idx].p_info.team != from->p_info.team)){                                     
                                        multi_io_send_reliable(&Net_players[idx], data, packet_size);
                                }
                        }
                        break;
                
                // message the player's target
                case MULTI_MSG_TARGET:
                        SDL_assert(to != NULL);
                        if(MULTI_CONNECTED((*to)) && !MULTI_STANDALONE((*to))){                         
                                multi_io_send_reliable(to, data, packet_size);
                        }
                        break;

                // message all players who match the expression string
                case MULTI_MSG_EXPR:
                        SDL_assert(expr != NULL);
                        for(idx=0;idx<MAX_PLAYERS;idx++){
                                if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && (&Net_players[idx] != from) && multi_msg_matches_expr(&Net_players[idx],expr) ){                                 
                                        multi_io_send_reliable(&Net_players[idx], data, packet_size);
                                }
                        }
                        break;
                }               
        }
        // send to the server, who will take care of routing it
        else {          
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

// process a general game chat packet, if we're the standalone we should rebroadcast
void process_game_chat_packet( ubyte *data, header *hinfo )
{
        int offset;
        ubyte mode;
        int color_index,player_index,to_player_index,should_display,server_msg; 
        char msg[MULTI_MSG_MAX_TEXT_LEN+CALLSIGN_LEN+2];
        char expr[255];
        short from, to;

        offset = HEADER_LENGTH;

        // get the id of the sender
        GET_SHORT(from);
        
        // determine if this is a server message
        GET_INT(server_msg);

        // get the mode
        GET_DATA(mode);
        
        // if targeting a specific player, get the address
        to = -1;
        switch(mode){
        case MULTI_MSG_TARGET:  
                GET_SHORT(to);
                break;
        case MULTI_MSG_EXPR:
                GET_STRING(expr);
                break;
        }
        // get the message itself
        GET_STRING(msg);
        PACKET_SET_SIZE();      

   // get the index of the sending player
        color_index = find_player_id(from);
        player_index = color_index;
        
        // if we couldn't find the player - bail
        if(player_index == -1){
                nprintf(("Network","Could not find player for processing game chat packet!\n"));
                return;
        }

        should_display = 0;

        // if we're the server, determine what to do with the packet here
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                // if he's targeting a specific player, find out who it is
                if(mode == MULTI_MSG_TARGET){
                        to_player_index = find_player_id(to);
                } else {
                        to_player_index = -1;
                }       

                // if we couldn't find who sent the message or who should be getting the message, the bail
                if(((to_player_index == -1) && (mode == MULTI_MSG_TARGET)) || (player_index == -1)){
                        return;
                }

                // determine if _I_ should be seeing the text
                if(Game_mode & GM_STANDALONE_SERVER){
                        should_display = 1;                     
                } 
                // check against myself for several specific cases
                else {
                        if((mode == MULTI_MSG_ALL) || 
                                ((mode == MULTI_MSG_FRIENDLY) && (Net_player->p_info.team == Net_players[player_index].p_info.team)) ||
                                ((mode == MULTI_MSG_HOSTILE) && (Net_player->p_info.team != Net_players[player_index].p_info.team)) ||
                                ((mode == MULTI_MSG_TARGET) && (MY_NET_PLAYER_NUM == to_player_index)) ||
                                ((mode == MULTI_MSG_EXPR) && multi_msg_matches_expr(Net_player,expr)) ){
                                should_display = 1;                     
                        }
                }
        
                // if we're the server of a game, we need to rebroadcast to all other players                   
                switch(mode){
                // individual target mission
                case MULTI_MSG_TARGET:          
                        // if I was the inteneded target, or we couldn't find the intended target, don't rebroadcast
                        if(to_player_index != MY_NET_PLAYER_NUM){
                                send_game_chat_packet(&Net_players[player_index], msg, (int)mode, &Net_players[to_player_index], NULL, server_msg);
                        }
                        break;
                // expression mode
                case MULTI_MSG_EXPR:
                        send_game_chat_packet(&Net_players[player_index], msg, (int)mode, NULL, expr, server_msg);
                        break;
                // all other modes
                default :               
                        send_game_chat_packet(&Net_players[player_index], msg, (int)mode, NULL, NULL, server_msg);
                        break;
                }
        }
        // if a client receives this packet, its always ok for him to display it
        else {
                should_display = 1;
        }

        // if we're not on a standalone
        if(should_display){
                if(server_msg == 2){
                        HUD_printf(msg);
                } else {
                        multi_display_chat_msg(msg, player_index, !server_msg); 
                }
        }       
}

// broadcast a hud message to all players
void send_hud_msg_to_all( char* msg )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;

        // only the server should be sending this packet        
        BUILD_HEADER(HUD_MSG);

        ADD_STRING(msg);

        multi_io_send_to_all( data, packet_size );
}

// process an incoming hud message packet
void process_hud_message(ubyte* data, header* hinfo)
{
        int offset;
        char msg_buffer[255];
        
        offset = HEADER_LENGTH;

        GET_STRING(msg_buffer);
        PACKET_SET_SIZE();
        
        // this is the only safe place to do this since only in the mission is the HUD guaranteed to be inited
        if(Game_mode & GM_IN_MISSION){
                HUD_printf(msg_buffer);
        }       
}

// send a join packet request to the specified address (should be a server)
void send_join_packet(net_addr* addr,join_request *jr)
{
        ubyte data[MAX_PACKET_SIZE];    
        int packet_size;
        
        // build the header and add the request
        BUILD_HEADER(JOIN);     
//      ADD_DATA(*jr);
        add_join_request(data, &packet_size, jr);
        
        psnet_send(addr, data, packet_size);    
}

// process an incoming join request packet
void process_join_packet(ubyte* data, header* hinfo)
{
        join_request jr;
        int offset;
        int ret_code;
        int host_restr_mode;
        // int team0_avail,team1_avail;
        char join_string[255];
        net_addr addr;  

        // only the server of the game should ever receive this packet
        if ( !(Net_player->flags & NETINFO_FLAG_AM_MASTER) )
                return;

        offset = HEADER_LENGTH; 
        
        // read in the request info
        memset(&jr,0,sizeof(join_request));     

        GET_DATA(jr);
        jr.tracker_id = INTEL_INT(jr.tracker_id);
        
        PACKET_SET_SIZE();      

        // fill in the address information of where this came from
        fill_net_addr(&addr, hinfo->addr, hinfo->net_id, hinfo->port);

        // determine if we should accept this guy, or return a reason we should reject him
        // see the DENY_* codes in multi.h
        ret_code = multi_eval_join_request(&jr,&addr);

        // evaluate the return code
        switch(ret_code){
        // he should be accepted
        case -1 :
                break;
                
        // we have to query the host because this is a restricted game
        case JOIN_QUERY_RESTRICTED :            
                if(!(Game_mode & GM_STANDALONE_SERVER)){                        
                        // notify the host of the event
                        snd_play(&Snds[SND_CUE_VOICE]);
                }

                // set the query timestamp
                Multi_restr_query_timestamp = timestamp(MULTI_QUERY_RESTR_STAMP);
                Netgame.flags |= NG_FLAG_INGAME_JOINING;

                // determine what mode we're in
                host_restr_mode = -1;
                memset(join_string,0,255);
//              if(Netgame.type == NG_TYPE_TEAM){
//                      multi_player_ships_available(&team0_avail,&team1_avail);
//
//                      if(team0_avail && team1_avail){
//                              host_restr_mode = MULTI_JOIN_RESTR_MODE_4;
//                              sprintf(join_string,"Player %s has tried to join. Accept on team 1 or 2 ?",jr.callsign);
//                      } else if(team0_avail && !team1_avail){
//                              host_restr_mode = MULTI_JOIN_RESTR_MODE_2;
//                              sprintf(join_string,"Player %s has tried to join team 0, accept y/n ? ?",jr.callsign);
//                      } else if(!team0_avail && team1_avail){
//                              host_restr_mode = MULTI_JOIN_RESTR_MODE_3;
//                              sprintf(join_string,"Player %s has tried to join team 1, accept y/n ?",jr.callsign);
//                      }
//              } else if(Netgame.mode == NG_MODE_RESTRICTED){
                        host_restr_mode = MULTI_JOIN_RESTR_MODE_1;
                        SDL_snprintf(join_string,SDL_arraysize(join_string),XSTR("Player %s has tried to join, accept y/n ?",715),jr.callsign);
//              }
                SDL_assert(host_restr_mode != -1);

                // store the request info
                memcpy(&Multi_restr_join_request,&jr,sizeof(join_request));
                memcpy(&Multi_restr_addr,&addr,sizeof(net_addr));
                Multi_join_restr_mode = host_restr_mode;

                // if i'm the standalone server, I need to send a query to the host
                if(Game_mode & GM_STANDALONE_SERVER){
                        send_host_restr_packet(jr.callsign,0,Multi_join_restr_mode);
                } else {
                        HUD_printf(join_string);
                }

                // NETLOG
                ml_printf(NOX("Receive restricted join request from %s"), jr.callsign);

                return;
        
        // he'e being denied for some reason
        default :       
                // send him the reason he is being denied
                send_deny_packet(&addr,ret_code);
                return;
        } 

        // process the rest of the request
        multi_process_valid_join_request(&jr,&addr);
}

// send a notification that a new player has joined the game (if target != NULL, broadcast the packet)
void send_new_player_packet(int new_player_num,net_player *target)
{
        ubyte data[MAX_PACKET_SIZE], val;
        int packet_size = 0;    
        
        BUILD_HEADER( NOTIFY_NEW_PLAYER );

        // add the new player's info
        ADD_INT(new_player_num);
//      ADD_DATA(Net_players[new_player_num].p_info.addr);

        add_net_addr(data, &packet_size, Net_players[new_player_num].p_info.addr);

        ADD_SHORT(Net_players[new_player_num].player_id);
        ADD_INT(Net_players[new_player_num].flags);
        ADD_STRING(Net_players[new_player_num].player->callsign);
        ADD_STRING(Net_players[new_player_num].player->image_filename);
        ADD_STRING(Net_players[new_player_num].player->squad_filename);
        ADD_STRING(Net_players[new_player_num].p_info.pxo_squad_name);

        val = (ubyte)Net_players[new_player_num].p_info.team;
        ADD_DATA(val);

        // broadcast the data
        if(target != NULL){
                multi_io_send_reliable(target, data, packet_size);
        } else {
                multi_io_send_to_all_reliable(data, packet_size);       
        }
}

// process a notification for a new player who has joined the game
void process_new_player_packet(ubyte* data, header* hinfo)
{
        int already_in_game = 0;
        int offset, new_player_num,player_num,new_flags;
        net_addr new_addr;      
        char new_player_name[CALLSIGN_LEN+2] = "";
        char new_player_image[MAX_FILENAME_LEN+1] = "";
        char new_player_squad[MAX_FILENAME_LEN+1] = "";
        char new_player_pxo_squad[LOGIN_LEN+1] = "";
        char notify_string[256];
        ubyte team;
        short new_id;

        offset = HEADER_LENGTH;

        // get the new players information
        GET_INT(new_player_num);
        memset(&new_addr, 0, sizeof(net_addr));
        get_net_addr(data, &offset, new_addr);

        GET_SHORT(new_id);
        GET_INT(new_flags);
        GET_STRING(new_player_name);    
        GET_STRING(new_player_image);
        GET_STRING(new_player_squad);
        GET_STRING(new_player_pxo_squad);
        GET_DATA(team);
        PACKET_SET_SIZE();

        player_num = multi_find_open_player_slot();
        SDL_assert(player_num != -1);
        
        // note that this new code does not check for duplicate IPs. It merely checks to see if
        // the slot referenced by new_player_num is already occupied by a connected player
        if(MULTI_CONNECTED(Net_players[new_player_num])){
                already_in_game=1;
        }

        // if he's not alreayd in the game for one reason or another
        if ( !already_in_game ) {
                if ( Game_mode & GM_IN_MISSION ){
                        HUD_sourced_printf(HUD_SOURCE_COMPUTER, XSTR("%s has entered the game\n",716), new_player_name);
                }

                // create the player
                memcpy(new_addr.net_id, Psnet_my_addr.net_id, 4);

                if(new_flags & NETINFO_FLAG_OBSERVER){
                        multi_obs_create_player(new_player_num,new_player_name,&new_addr,&Players[player_num]);
                        Net_players[new_player_num].flags |= new_flags;
                } else {
                        multi_create_player( new_player_num, &Players[player_num],new_player_name, &new_addr, -1, new_id );
                        Net_players[new_player_num].flags |= new_flags;
                }

                // copy in the filename
                if(strlen(new_player_image) > 0){
                        SDL_strlcpy(Net_players[new_player_num].player->image_filename, new_player_image, MAX_FILENAME_LEN);
                } else {
                        SDL_strlcpy(Net_players[new_player_num].player->image_filename, "", MAX_FILENAME_LEN);
                }
                // copy his pilot squad filename
                Net_players[new_player_num].player->insignia_texture = -1;
                player_set_squad_bitmap(Net_players[new_player_num].player, new_player_squad);                          

                // copy in his pxo squad name
                SDL_strlcpy(Net_players[new_player_num].p_info.pxo_squad_name, new_player_pxo_squad, LOGIN_LEN);

                // since we just created the player, set the last_heard_time here.
                Net_players[new_player_num].last_heard_time = timer_get_fixed_seconds();

                Net_players[new_player_num].p_info.team = team;

                Net_players[new_player_num].player_id = new_id;

                // zero out this players ping
                multi_ping_reset(&Net_players[new_player_num].s_info.ping);             

                // add a chat message
                if(Net_players[new_player_num].player->callsign != NULL){
                        SDL_snprintf(notify_string,SDL_arraysize(notify_string),XSTR("<%s has joined>",717),Net_players[new_player_num].player->callsign);
                        multi_display_chat_msg(notify_string,0,0);
                }
        }               

        // NETLOG
        ml_printf(NOX("Received notification of new player %s"), Net_players[new_player_num].player->callsign);
        
        // let the current ui screen know someone joined
        switch(gameseq_get_state()){
        case GS_STATE_MULTI_HOST_SETUP :
                multi_create_handle_join(&Net_players[new_player_num]);
                break;
        case GS_STATE_MULTI_CLIENT_SETUP :
                multi_jw_handle_join(&Net_players[new_player_num]);
                break;
        }
}

#define PLAYER_DATA_SLOP        100

void send_accept_player_data( net_player *npp, int is_ingame )
{
        int packet_size;        
        int i;
        ubyte data[MAX_PACKET_SIZE], stop;

        BUILD_HEADER(ACCEPT_PLAYER_DATA);

        // add in the netplayer data for all players    
        stop = APD_NEXT;
        for (i=0; i<MAX_PLAYERS; i++) {
                // skip non connected players
                if ( !MULTI_CONNECTED(Net_players[i]) ){
                        continue;
                }
                
                // skip this new player's entry
                if ( npp->player_id == Net_players[i].player_id ){
                        continue;
                }
                
                // add the stop byte
                ADD_DATA(stop);

                // add the player's number
                ADD_INT(i);             

                // add the player's address
        //      ADD_DATA(Net_players[i].p_info.addr);
                add_net_addr(data, &packet_size, Net_players[i].p_info.addr);

                // add his id#
                ADD_SHORT(Net_players[i].player_id);

                // add his callsign
                ADD_STRING(Net_players[i].player->callsign);

                // add his image filename
                ADD_STRING(Net_players[i].player->image_filename);

                // add his squad filename
                ADD_STRING(Net_players[i].player->squad_filename);

                // add his PXO squad name
                ADD_STRING(Net_players[i].p_info.pxo_squad_name);
                
                // add his flags
                ADD_INT(Net_players[i].flags);          

                // add his object's net sig
                if ( is_ingame ) {
                        ADD_USHORT( Objects[Net_players[i].player->objnum].net_signature );
                }

                if ( (packet_size + PLAYER_DATA_SLOP) > MAX_PACKET_SIZE ) {
                        stop = APD_END_PACKET;
                        ADD_DATA(stop);                 
                        multi_io_send_reliable( npp, data, packet_size );
                        BUILD_HEADER(ACCEPT_PLAYER_DATA);
                        stop = APD_NEXT;
                }

        }

        // add the stop byte
        stop = APD_END_DATA;
        ADD_DATA(stop); 
        multi_io_send_reliable(npp, data, packet_size);
}

// send an accept packet to a client in response to a request to join the game
void send_accept_packet(int new_player_num, int code, int ingame_join_team)
{
        int packet_size, i;
        ubyte data[MAX_PACKET_SIZE],val;
        char notify_string[256];

        // sanity
        SDL_assert(new_player_num >= 0);

        // setup his "reliable" socket
        Net_players[new_player_num].last_heard_time = timer_get_fixed_seconds();

        // build the packet header
        packet_size = 0;
        BUILD_HEADER(ACCEPT);   
        
        // add the accept code
        ADD_INT(code);
        
        // add code specific accept data
        if (code & ACCEPT_INGAME) {
                // the game filename
                ADD_STRING(Game_current_mission_filename);

                // if he is joining on a specific team, mark it here
                if(ingame_join_team != -1){
                        val = 1;
                        ADD_DATA(val);
                        val = (ubyte)ingame_join_team;
                        ADD_DATA(val);
                } else {
                        val = 0;
                        ADD_DATA(val);
                }
        } 

        if (code & ACCEPT_OBSERVER) {
                SDL_assert(!(code & (ACCEPT_CLIENT | ACCEPT_HOST)));
        }

        if (code & ACCEPT_HOST) {
                SDL_assert(!(code & (ACCEPT_CLIENT | ACCEPT_OBSERVER | ACCEPT_INGAME)));
        }

        if (code & ACCEPT_CLIENT) {
                SDL_assert(!(code & (ACCEPT_HOST | ACCEPT_OBSERVER | ACCEPT_INGAME)));
        }

        // add the current skill level setting on the host
        ADD_INT(Game_skill_level);

        // add this guys player num 
        ADD_INT(new_player_num);

        // add his player id
        ADD_SHORT(Net_players[new_player_num].player_id);

        // add netgame type flags
        ADD_INT(Netgame.type_flags);
        
//#ifndef NDEBUG
        // char buffer[100];
        // nprintf(("Network", "About to send accept packet to %s on port %d\n", get_text_address(buffer, addr->addr), addr->port ));
//#endif

        // actually send the packet     
        psnet_send(&Net_players[new_player_num].p_info.addr, data, packet_size);

   // if he's not an observer, inform all the other players in the game about him       
        // inform the other players in the game about this new player
        for (i=0; i<MAX_PLAYERS; i++) {
                // skip unconnected players as well as this new guy himself
                if ( !MULTI_CONNECTED(Net_players[i]) || psnet_same(&Net_players[new_player_num].p_info.addr, &(Net_players[i].p_info.addr)) || (Net_player == &Net_players[i])) {
                        continue;
                }

                // send the new packet
                send_new_player_packet(new_player_num,&Net_players[i]);
        }

        // add a chat message
        if(Net_players[new_player_num].player->callsign != NULL){
                SDL_snprintf(notify_string,SDL_arraysize(notify_string),XSTR("<%s has joined>",717), Net_players[new_player_num].player->callsign);
                multi_display_chat_msg(notify_string, 0, 0);
        }       

        // handle any team vs. team details
        if (!(code & ACCEPT_OBSERVER)) {                
                multi_team_handle_join(&Net_players[new_player_num]);           
        }               

        // NETLOG
        if(Net_players[new_player_num].tracker_player_id >= 0){
                ml_printf(NOX("Server accepted %s (tracker id %d) as new client"), Net_players[new_player_num].player->callsign, Net_players[new_player_num].tracker_player_id);
        } else {
                ml_printf(NOX("Server accepted %s as new client"), Net_players[new_player_num].player->callsign);
        }
}


// process the player data from the server
void process_accept_player_data( ubyte *data, header *hinfo )
{
        int offset, player_num, player_slot_num, new_flags;
        char name[CALLSIGN_LEN + 1] = "";
        char image_name[MAX_FILENAME_LEN + 1] = "";
        char squad_name[MAX_FILENAME_LEN + 1] = "";
        char pxo_squad_name[LOGIN_LEN+1] = "";
        short player_id;
        net_addr addr;
        ubyte stop;
        ushort ig_signature;

        offset = HEADER_LENGTH;

        GET_DATA(stop);
        while ( stop == APD_NEXT ) {
                player_slot_num = multi_find_open_player_slot();
                SDL_assert(player_slot_num != -1);

                // get the player's number
                GET_INT(player_num);

                // add the player's address
                memset(&addr, 0, sizeof(net_addr));
                get_net_addr(data, &offset, addr);

                // get the player's id#
                GET_SHORT(player_id);

                // get his callsign
                GET_STRING(name);

                // add his image filename
                GET_STRING(image_name);

                // get his squad logo filename
                GET_STRING(squad_name);

                // get his PXO squad name
                GET_STRING(pxo_squad_name);
                
                // get his flags
                GET_INT(new_flags);
                
                if (Net_players[player_num].flags & NETINFO_FLAG_OBSERVER) {
                        if (!multi_obs_create_player(player_num, name, &addr, &Players[player_slot_num])) {
                                Int3();
                        }

                } else {
                        //  the error handling here is less than stellar.  We should probably put up a popup and go
                        // back to the main menu.  But then again, this should never ever happen!
                        if ( !multi_create_player(player_num, &Players[player_slot_num],name, &addr, -1, player_id) ) {
                                Int3();
                        }
                }

                // copy his image filename
                SDL_strlcpy(Net_players[player_num].player->image_filename, image_name, MAX_FILENAME_LEN);
                
                // copy his pilot squad filename
                Net_players[player_num].player->insignia_texture = -1;
                player_set_squad_bitmap(Net_players[player_num].player, squad_name);

                // copy his pxo squad name
                SDL_strlcpy(Net_players[player_num].p_info.pxo_squad_name, pxo_squad_name, LOGIN_LEN);

                // set his player id#
                Net_players[player_num].player_id = player_id;

                // mark him as being connected
                Net_players[player_num].flags |= NETINFO_FLAG_CONNECTED;
                Net_players[player_num].flags |= new_flags;

                // set the server pointer
                if ( Net_players[player_num].flags & NETINFO_FLAG_AM_MASTER ) {
                        Netgame.server = &Net_players[player_num];
                        Netgame.server->last_heard_time = timer_get_fixed_seconds();

                        // also - always set the server address to be where this data came from, NOT from 
                        // the data in the packet               
                        fill_net_addr(&Net_players[player_num].p_info.addr, hinfo->addr, hinfo->net_id, hinfo->port);
                }

                // set the host pointer
                if ( Net_players[player_num].flags & NETINFO_FLAG_GAME_HOST ) {
                        Netgame.host = &Net_players[player_num];
                }

                // read in the player's object net signature and store as his objnum for now
                if ( Net_player->flags & NETINFO_FLAG_ACCEPT_INGAME ) {
                        GET_USHORT( ig_signature );
                        Net_players[player_num].player->objnum = ig_signature;
                }

                // get the stop byte
                GET_DATA(stop);
        }
        PACKET_SET_SIZE();

        if ( stop == APD_END_DATA ) {
                // if joining a game automatically, set the connect address to NULl so we don't try and
                // do this next time we enter a game
                if (Cmdline_connect_addr != NULL) {
                        Cmdline_connect_addr = NULL;
                }

                // send my stats to the server if I'm not in observer mode
                if (!(Net_player->flags & NETINFO_FLAG_ACCEPT_OBSERVER)) {
                        send_player_stats_block_packet(Net_player, STATS_ALLTIME);
                }

                // if i'm being accepted as a host, then move into the host setup state
                if ( Net_player->flags & NETINFO_FLAG_ACCEPT_HOST) {
                        // set my permission bits
                        Net_player->flags |= NETINFO_FLAG_GAME_HOST;
                        Net_player->state = NETPLAYER_STATE_STD_HOST_SETUP;

                        gameseq_post_event(GS_EVENT_MULTI_START_GAME);
                }

                if ( Net_player->flags & NETINFO_FLAG_ACCEPT_OBSERVER) {
                        Net_player->flags |= NETINFO_FLAG_OBSERVER;

                        // since observers can join 1 of 2 ways, only do this if we're not doing an ingame observer join
                        if ( !(Net_player->flags & NETINFO_FLAG_ACCEPT_INGAME) ) {
                                gameseq_post_event(GS_EVENT_MULTI_CLIENT_SETUP);
                        }
                }

                if ( Net_player->flags & NETINFO_FLAG_ACCEPT_CLIENT) {
                        gameseq_post_event(GS_EVENT_MULTI_CLIENT_SETUP);        
                }

                if ( Net_player->flags & NETINFO_FLAG_ACCEPT_INGAME) {
                        // flag myself as being an ingame joiner
                        Net_player->flags |= NETINFO_FLAG_INGAME_JOIN;          

                        // move myself into the ingame join mission sync state
                        Multi_sync_mode = MULTI_SYNC_INGAME;
                        gameseq_post_event(GS_EVENT_MULTI_MISSION_SYNC);                                
                }

                // update my options on the server
                multi_options_update_local();

                // if we're in PXO mode, mark it down in our player struct
                if(MULTI_IS_TRACKER_GAME){
                        Player->flags |= PLAYER_FLAGS_HAS_PLAYED_PXO;
                        Player->save_flags |= PLAYER_FLAGS_HAS_PLAYED_PXO;
                }
        }
}

// process an accept packet from the server
extern int Select_default_ship;

void process_accept_packet(ubyte* data, header* hinfo)
{
        int code, my_player_num, offset;
        ubyte val,team = 0;
        short player_id;
        
        // get the accept code
        offset = HEADER_LENGTH; 

        GET_INT(code);

        // read in the accept code specific data
        val = 0;
        if (code & ACCEPT_INGAME) {
                // the game filename
                GET_STRING(Game_current_mission_filename);
                Select_default_ship = 0;

                // determine if I'm being placed on a team
                GET_DATA(val);
                if(val){
                        GET_DATA(team);
                }
        }

        if (code & ACCEPT_OBSERVER) {
                SDL_assert(!(code & (ACCEPT_CLIENT | ACCEPT_HOST)));
        }

        if (code & ACCEPT_HOST) {
                SDL_assert(!(code & (ACCEPT_CLIENT | ACCEPT_OBSERVER | ACCEPT_INGAME)));
        }

        if (code & ACCEPT_CLIENT) {
                SDL_assert(!(code & (ACCEPT_HOST | ACCEPT_OBSERVER | ACCEPT_INGAME)));
        }

        // fill in the netgame server address
        fill_net_addr( &Netgame.server_addr, hinfo->addr, hinfo->net_id, hinfo->port ); 

        // get the skill level setting
        GET_INT(Game_skill_level);

        // get my netplayer number
        GET_INT(my_player_num);

        // get my id #
        GET_SHORT(player_id);

        // get netgame type flags
        GET_INT(Netgame.type_flags);

        // setup the Net_players structure for myself first
        Net_player = &Net_players[my_player_num];
        Net_player->flags = 0;
        Net_player->tracker_player_id = Multi_tracker_id;
        Net_player->player_id = player_id;
        Net_player->s_info.xfer_handle = -1;
        // stuff_netplayer_info( Net_player, &Psnet_my_addr, Ships[Objects[Player->objnum].instance].ship_info_index, Player ); 
        stuff_netplayer_info( Net_player, &Psnet_my_addr, 0, Player );  
        multi_options_local_load(&Net_player->p_info.options, Net_player);
        if(val){
                Net_player->p_info.team = team;
        }       

        // determine if I have a CD
        if(Multi_has_cd){
                Net_player->flags |= NETINFO_FLAG_HAS_CD;
        }       

        // set accept code in netplayer for this guy
        if ( code & ACCEPT_INGAME ){
                Net_player->flags |= NETINFO_FLAG_ACCEPT_INGAME;
        }
        if ( code & ACCEPT_OBSERVER ){
                Net_player->flags |= NETINFO_FLAG_ACCEPT_OBSERVER;
        }
        if ( code & ACCEPT_HOST ){
                Net_player->flags |= NETINFO_FLAG_ACCEPT_HOST;
        }
        if ( code & ACCEPT_CLIENT ){
                Net_player->flags |= NETINFO_FLAG_ACCEPT_CLIENT;
        }

        // if I have hacked data
        if(game_hacked_data()){
                Net_player->flags |= NETINFO_FLAG_HAXOR;
        }

        // if we're supposed to flush our local data cache, do so now
        if(Net_player->p_info.options.flags & MLO_FLAG_FLUSH_CACHE){
                multi_flush_multidata_cache();
        }

        Net_player->sv_bytes_sent = 0;
        Net_player->sv_last_pl = -1;
        Net_player->cl_bytes_recvd = 0;
        Net_player->cl_last_pl = -1;

        // intiialize endgame stuff
        multi_endgame_init();

        PACKET_SET_SIZE();

        // make a call to psnet to initialize and try to connect with the server.
        psnet_rel_connect_to_server( &Net_player->reliable_socket, &Netgame.server_addr );
        if ( Net_player->reliable_socket == INVALID_SOCKET ) {
                multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_NONE, MULTI_END_ERROR_CONNECT_FAIL);
        }
}

// send a notice that the player at net_addr is leaving (if target is NULL, the broadcast the packet)
void send_leave_game_packet(short player_id, int kicked_reason, net_player *target)
{
        ubyte data[MAX_PACKET_SIZE];
        char val;
        int packet_size = 0;

        BUILD_HEADER(LEAVE_GAME);

        // add a flag indicating whether he was kicked or not
        val = (char)kicked_reason;
        ADD_DATA(val);

        if (player_id < 0) {
                ADD_SHORT(Net_player->player_id);

                // inform the host that we are leaving the game
                if (Net_player->flags & NETINFO_FLAG_AM_MASTER) {                       
                        multi_io_send_to_all_reliable(data, packet_size);
                } else {
                        multi_io_send_reliable(Net_player, data, packet_size);
                }
        }
        // this is the case where to server is tossing a player (or indicating a respawned player has quit or become an observer)
        // so he has to tell everyone that this guy left
        else {
                nprintf(("Network","Sending a leave game packet to all players (server)\n"));

                // a couple of important checks
                SDL_assert(player_id != Net_player->player_id);
                SDL_assert(Net_player->flags & NETINFO_FLAG_AM_MASTER);

                // add the id of the guy to be kicked
                ADD_SHORT(player_id);

                // broadcast to everyone
                if (target == NULL) {                   
                        multi_io_send_to_all_reliable(data, packet_size);
                } else {
                        multi_io_send_reliable(target, data, packet_size);
                }
        }
}

// process a notification the a player has left the game
void process_leave_game_packet(ubyte* data, header* hinfo)
{
        int offset;
        short deader_id;
        int player_num;
        char kicked_reason;     
        char str[512];

        offset = HEADER_LENGTH;

        // get whether he was kicked
        GET_DATA(kicked_reason);

        // get the address of the guy who is to leave
        GET_SHORT(deader_id);
        PACKET_SET_SIZE();

        // determine who is dropping and printf out a notification
        player_num = find_player_id(deader_id);
        if (player_num == -1) {
                nprintf(("Network", "Received leave game packet for unknown player, ignoring\n"));
                return;

        } else {
                nprintf(("Network", "Received a leave game notice for %s\n", Net_players[player_num].player->callsign));
        }

        // a hook to display that a player was kicked
        if (kicked_reason >= 0){
                // if it was me that was kicked, leave the game
                if((Net_player != NULL) && (Net_player->player_id == deader_id)){
                        int notify_code;

                        switch(kicked_reason){
                        case KICK_REASON_BAD_XFER:
                                notify_code = MULTI_END_NOTIFY_KICKED_BAD_XFER;
                                break;
                        case KICK_REASON_CANT_XFER:
                                notify_code = MULTI_END_NOTIFY_KICKED_CANT_XFER;
                                break;
                        case KICK_REASON_INGAME_ENDED:
                                notify_code = MULTI_END_NOTIFY_KICKED_INGAME_ENDED;
                                break;
                        default:
                                notify_code = MULTI_END_NOTIFY_KICKED;
                                break;
                        }

                        multi_quit_game(PROMPT_NONE, notify_code);
                        return;

                // otherwise indicate someone was kicked
                } else {
                        nprintf(("Network","%s was kicked\n",Net_players[player_num].player->callsign));                        

                        // display the result
                        memset(str, 0, 512);
                        multi_kick_get_text(&Net_players[player_num], kicked_reason, str, SDL_arraysize(str));
                        multi_display_chat_msg(str, player_num, 0);
                }
        }

        // first of all, if we're the master, we should be rebroadcasting this packet
        if (Net_player->flags & NETINFO_FLAG_AM_MASTER) {
                char msg[255];

                SDL_snprintf(msg, SDL_arraysize(msg), XSTR("%s has left the game",719), Net_players[player_num].player->callsign );

                if (!(Game_mode & GM_STANDALONE_SERVER)){
                        HUD_sourced_printf(HUD_SOURCE_HIDDEN, msg);
                }

                send_hud_msg_to_all(msg);               
                multi_io_send_to_all_reliable(data, offset);
        }

        // leave the game if the host and/or master has dropped
        /*
        if (((Net_players[player_num].flags & NETINFO_FLAG_AM_MASTER) || (Net_players[player_num].flags & NETINFO_FLAG_GAME_HOST)) ) {          
                nprintf(("Network","Host and/or server has left the game - aborting...\n"));

                // NETLOG
                ml_string(NOX("Host and/or server has left the game"));

                // if the host leaves in the debriefing state, we should still wait until the player selects accept before we quit
                if (gameseq_get_state() != GS_STATE_DEBRIEF) {                  
                        multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_SERVER_LEFT);
                }               

                delete_player(player_num);
        } else {
                */
        delete_player(player_num);      

        // OSAPI GUI stuff (if standalone)
        if (Game_mode & GM_STANDALONE_SERVER) {
      // returns true if we should reset the standalone
                if (std_remove_player(&Net_players[player_num])) {
                        nprintf(("Network", "Should reset!!\n"));
                        return;
                }

                // update these gui vals
                std_connect_set_host_connect_status();
                std_connect_set_connect_count();
        }
}

// send information about this currently active game to the specified address
void send_game_active_packet(net_addr* addr)
{
        int packet_size;
        ushort flags;
        ubyte data[MAX_PACKET_SIZE],val;

        // build the header and add the data
        BUILD_HEADER(GAME_ACTIVE);
        
        // add the server version and compatible version #
        val = MULTI_FS_SERVER_VERSION;
        ADD_DATA(val);
        val = MULTI_FS_SERVER_COMPATIBLE_VERSION;
        ADD_DATA(val);

        ADD_STRING(Netgame.name);
        ADD_STRING(Netgame.mission_name);
        ADD_STRING(Netgame.title);      
        val = (ubyte)multi_num_players();
        ADD_DATA(val);
        
        // add the proper flags
        flags = 0;
        if((Netgame.mode == NG_MODE_PASSWORD) || ((Game_mode & GM_STANDALONE_SERVER) && (multi_num_players() == 0) && (std_is_host_passwd()))){
                flags |= AG_FLAG_PASSWD;
        }

        // proper netgame type flags
        if(Netgame.type_flags & NG_TYPE_TEAM){
                flags |= AG_FLAG_TEAMS;
        } else if(Netgame.type_flags & NG_TYPE_DOGFIGHT){
                flags |= AG_FLAG_DOGFIGHT;
        } else {
                flags |= AG_FLAG_COOP;
        }       

        // proper netgame state flags
        switch(Netgame.game_state){
        case NETGAME_STATE_FORMING:
                flags |= AG_FLAG_FORMING;
                break;
        
        case NETGAME_STATE_BRIEFING:
        case NETGAME_STATE_MISSION_SYNC:
        case NETGAME_STATE_HOST_SETUP:
                flags |= AG_FLAG_BRIEFING;
                break;
        
        case NETGAME_STATE_IN_MISSION:
                flags |= AG_FLAG_IN_MISSION;
                break;
        
        case NETGAME_STATE_PAUSED:
                flags |= AG_FLAG_PAUSE;
                break;
        
        case NETGAME_STATE_ENDGAME:
        case NETGAME_STATE_DEBRIEF:
                flags |= AG_FLAG_DEBRIEF;
                break;
        }

        // if this is a standalone
        if(Game_mode & GM_STANDALONE_SERVER){
                flags |= AG_FLAG_STANDALONE;
        }

        // if we're in campaign mode
        if(Netgame.campaign_mode == MP_CAMPAIGN){
                flags |= AG_FLAG_CAMPAIGN;
        }

        // add the data about the connection speed of the host machine
        SDL_assert( (Multi_connection_speed >= 0) && (Multi_connection_speed <= 4) );
        flags |= (Multi_connection_speed << AG_FLAG_CONNECTION_BIT);

        ADD_USHORT(flags);
        
        // send the data        
        psnet_send(addr, data, packet_size);
}

// process information about an active game
void process_game_active_packet(ubyte* data, header* hinfo)
{
        int offset;     
        ubyte val;
        active_game ag;
        int modes_compatible;
        
        fill_net_addr(&ag.server_addr, hinfo->addr, hinfo->net_id, hinfo->port);

        // read this game into a temporary structure
        offset = HEADER_LENGTH;

        // get the server version and compatible version
        GET_DATA(ag.version);
        GET_DATA(ag.comp_version);

        GET_STRING(ag.name);
        GET_STRING(ag.mission_name);
        GET_STRING(ag.title);   
        GET_DATA(val);
        ag.num_players = val;
        GET_USHORT(ag.flags);

        PACKET_SET_SIZE();      

        modes_compatible = 1;
        /*
        if((ag.flags & AG_FLAG_TRACKER) && !Multi_options_g.pxo){
                modes_compatible = 0;
        }
        if(!(ag.flags & AG_FLAG_TRACKER) && Multi_options_g.pxo){
                modes_compatible = 0;
        }
        */

        // if this is a compatible version, and our modes are compatible, register it
        if( (ag.version == MULTI_FS_SERVER_VERSION) && modes_compatible ){
                multi_update_active_games(&ag);
        }
}

// send_game_update_packet sends an updated Netgame structure to all players currently connected.  The update
// is used to change the current mission, current state, etc.
void send_netgame_update_packet(net_player *pl)
{
        int packet_size;
        int idx;
        ubyte data[MAX_PACKET_SIZE];

        packet_size = 0;
        BUILD_HEADER(GAME_UPDATE);
        
        // with new mission description field, this becomes way to large
        // so we must add every element piece by piece except the       
        ADD_STRING(Netgame.name);
        ADD_STRING(Netgame.mission_name);       
        ADD_STRING(Netgame.title);
        ADD_STRING(Netgame.campaign_name);
        ADD_INT(Netgame.campaign_mode); 
        ADD_INT(Netgame.max_players);                   
        ADD_INT(Netgame.security);
        ADD_UINT(Netgame.respawn);
        ADD_INT(Netgame.flags);
        ADD_INT(Netgame.type_flags);
        ADD_INT(Netgame.version_info);
        ADD_DATA(Netgame.debug_flags);

        // only the server should ever send the netgame state (standalone situation)
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                ADD_INT(Netgame.game_state);
        }
        
        // if we're the host on a standalone, send to the standalone and let him rebroadcast
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                if ( pl == NULL ) {                     
                        multi_io_send_to_all_reliable(data, packet_size);

                        for(idx=0; idx<MAX_PLAYERS; idx++){
                                if(MULTI_CONNECTED(Net_players[idx]) && (Net_player != &Net_players[idx])){
                                        send_netgame_descript_packet(&Net_players[idx].p_info.addr, 1);
                                }
                        }
                } else {                        
                        multi_io_send_reliable(pl, data, packet_size);
                        send_netgame_descript_packet( &pl->p_info.addr , 1 );
                }
        } else {
                SDL_assert( pl == NULL );                       // I don't think that a host in a standalone game would get here.
                multi_io_send_reliable(Net_player, data, packet_size);
        }               

        // host should always send a netgame options update as well
        if(Net_player->flags & NETINFO_FLAG_GAME_HOST){
                multi_options_update_netgame();
        }
}

// process information about the netgame sent from the server/host
void process_netgame_update_packet( ubyte *data, header *hinfo )
{
        int offset;//,old_flags;
        int ng_state;
                
        SDL_assert(!(Game_mode & GM_STANDALONE_SERVER));
        SDL_assert(!(Net_player->flags & NETINFO_FLAG_AM_MASTER));

        // read in the netgame information
        offset = HEADER_LENGTH; 
        GET_STRING(Netgame.name);
        GET_STRING(Netgame.mission_name);       
        GET_STRING(Netgame.title);      
        GET_STRING(Netgame.campaign_name);
        GET_INT(Netgame.campaign_mode); 
        GET_INT(Netgame.max_players);                                   // ignore on the standalone, who keeps track of this himself                    
        GET_INT(Netgame.security);
        GET_UINT(Netgame.respawn);              
        
        // be sure not to blast the quitting flag because of the "one frame extra" problem
//      old_flags = Netgame.flags;
        GET_INT(Netgame.flags); 
        GET_INT(Netgame.type_flags);
        GET_INT(Netgame.version_info);
        GET_DATA(Netgame.debug_flags);

        // netgame state        
        GET_INT(ng_state);
        
        PACKET_SET_SIZE();
                                                        
        // now compare the passed in game state to our current known state.  If it has changed, then maybe
        // do something interesting.    
        // move from the forming or debriefing state to the mission sync state
  if ( ng_state == NETGAME_STATE_MISSION_SYNC ){
          // if coming from the forming state
                if( (Netgame.game_state == NETGAME_STATE_FORMING) ||
                         ((Netgame.game_state != NETGAME_STATE_FORMING) && ((gameseq_get_state() == GS_STATE_MULTI_HOST_SETUP) || (gameseq_get_state() == GS_STATE_MULTI_CLIENT_SETUP))) ){
                        // do any special processing for forced state transitions
                        multi_handle_state_special();
                                                
                        Multi_sync_mode = MULTI_SYNC_PRE_BRIEFING;
                        SDL_strlcpy( Game_current_mission_filename, Netgame.mission_name, MAX_FILENAME_LEN );
                        gameseq_post_event(GS_EVENT_MULTI_MISSION_SYNC);
                } 
                // if coming from the debriefing state
                else if( (Netgame.game_state == NETGAME_STATE_DEBRIEF) ||
                         ((Netgame.game_state != NETGAME_STATE_DEBRIEF) && ((gameseq_get_state() == GS_STATE_DEBRIEF) || (gameseq_get_state() == GS_STATE_MULTI_DOGFIGHT_DEBRIEF)) ) ){ 

                        // do any special processing for forced state transitions
                        multi_handle_state_special();

                        multi_flush_mission_stuff();
                                                
                        Multi_sync_mode = MULTI_SYNC_PRE_BRIEFING;
                        SDL_strlcpy( Game_current_mission_filename, Netgame.mission_name, MAX_FILENAME_LEN );
                        gameseq_post_event(GS_EVENT_MULTI_MISSION_SYNC);
                }
        } 
        // move from mission sync to team select
        else if ( ng_state == NETGAME_STATE_BRIEFING ){
                if( (Netgame.game_state == NETGAME_STATE_MISSION_SYNC) ||
                         ((Netgame.game_state != NETGAME_STATE_MISSION_SYNC) && (gameseq_get_state() == GS_STATE_MULTI_MISSION_SYNC) && (Multi_sync_mode != MULTI_SYNC_POST_BRIEFING)) ){
                        
                        // do any special processing for forced state transitions
                        multi_handle_state_special();

                        SDL_strlcpy( Game_current_mission_filename, Netgame.mission_name, MAX_FILENAME_LEN );
                        gameseq_post_event(GS_EVENT_START_BRIEFING);                    
                }
        }               
        // move from the debriefing to the create game screen
        else if ( ng_state == NETGAME_STATE_FORMING ){
                if( (Netgame.game_state == NETGAME_STATE_DEBRIEF) ||
                         ((Netgame.game_state != NETGAME_STATE_DEBRIEF) && ((gameseq_get_state() == GS_STATE_DEBRIEF) || (gameseq_get_state() == GS_STATE_MULTI_DOGFIGHT_DEBRIEF)) ) ){ 
                        // do any special processing for forced state transitions
                        multi_handle_state_special();

                        multi_flush_mission_stuff();
                        
                        // move to the proper screen
                        if(Net_player->flags & NETINFO_FLAG_GAME_HOST){
                                gameseq_post_event(GS_EVENT_MULTI_HOST_SETUP);
                        } else {
                                gameseq_post_event(GS_EVENT_MULTI_CLIENT_SETUP);
                        }
                }
        }               

        Netgame.game_state = ng_state;  
}

// send a request or a reply for mission description, if code == 0, request, if code == 1, reply
void send_netgame_descript_packet(net_addr *addr, int code)
{
        ubyte data[MAX_PACKET_SIZE],val;
        int len;
        int packet_size = 0;

        // build the header
        BUILD_HEADER(UPDATE_DESCRIPT);

        val = (ubyte)code;
        ADD_DATA(val);  

        if(code == 1){
                // add as much of the description as we dare
                len = strlen(The_mission.mission_desc);
                if(len > MAX_PACKET_SIZE - 10){
                        len = MAX_PACKET_SIZE - 10;
                        ADD_INT(len);
                        memcpy(data+packet_size,The_mission.mission_desc,len);
                        packet_size += len;
                } else {
                        ADD_STRING(The_mission.mission_desc);
                }
        } 
        
        SDL_assert(addr != NULL);
        if(addr != NULL){
                psnet_send(addr, data, packet_size);
        }
}

// process an incoming netgame description packet
void process_netgame_descript_packet( ubyte *data, header *hinfo )
{
        int offset,state;
        ubyte code;     
        char mission_desc[MISSION_DESC_LENGTH+2];
        net_addr addr;

        fill_net_addr(&addr, hinfo->addr, hinfo->net_id, hinfo->port);

        // read this game into a temporary structure
        offset = HEADER_LENGTH;
        GET_DATA(code); 
        
        // if this is a request for mission description
        if(code == 0){
                if(!(Net_player->flags & NETINFO_FLAG_AM_MASTER)){
                        PACKET_SET_SIZE();
                        return;
                }               

                // send an update to this guy
                send_netgame_descript_packet(&addr, 1);
        } else {        
                memset(mission_desc,0,MISSION_DESC_LENGTH+2);           
                GET_STRING(mission_desc);

                // only display if we're in the proper state
                state = gameseq_get_state();
                switch(state){
                case GS_STATE_MULTI_JOIN_GAME:
                case GS_STATE_MULTI_CLIENT_SETUP:                       
                case GS_STATE_MULTI_HOST_SETUP:
                        multi_common_set_text(mission_desc);
                        break;
                }
        }

        PACKET_SET_SIZE();      
}

// broadcast a query for active games. IPX will use net broadcast and TCP will either request from the MT or from the specified list
void broadcast_game_query()
{
        int packet_size;
        net_addr addr;  
        server_item *s_moveup;
        ubyte data[MAX_PACKET_SIZE];    

        BUILD_HEADER(GAME_QUERY);       
        
        // go through the server list and query each of those as well
        s_moveup = Game_server_head;
        if(s_moveup != NULL){
                do {                            
                        send_server_query(&s_moveup->server_addr);                      
                        s_moveup = s_moveup->next;                                      
                } while(s_moveup != Game_server_head);          
        }       

        fill_net_addr(&addr, Psnet_my_addr.addr, Psnet_my_addr.net_id, DEFAULT_GAME_PORT);

        // send out a broadcast if our options allow us
        if(Net_player->p_info.options.flags & MLO_FLAG_LOCAL_BROADCAST){
                psnet_broadcast( &addr, data, packet_size);
        }               
}

// send an individual query to an address to see if there is an active game
void send_server_query(net_addr *addr)
{
        int packet_size;        
        ubyte data[MAX_PACKET_SIZE];

        // build the header and send the data
        BUILD_HEADER(GAME_QUERY);                               
        psnet_send(addr, data, packet_size);
}

// process a query from a client looking for active freespace games
void process_game_query(ubyte* data, header* hinfo)
{
        int offset;     
        net_addr addr;

        offset = HEADER_LENGTH;

        PACKET_SET_SIZE();

        // check to be sure that we don't capture our own broadcast message
        fill_net_addr(&addr, hinfo->addr, hinfo->net_id, hinfo->port);
        if ( psnet_same( &addr, &Psnet_my_addr) ){
                return;
        }

        // if I am not a server of a game, don't send a reply!!!
        if ( !(Net_player->flags & NETINFO_FLAG_AM_MASTER) ){
                return;
        }

        // if the game options are being selected, then ignore the request
        // also, if Netgame.max_players == -1, the host has not chosen a mission yet and we should wait
        if((Netgame.game_state == NETGAME_STATE_STD_HOST_SETUP) || (Netgame.game_state == NETGAME_STATE_HOST_SETUP) || (Netgame.game_state == 0) || (Netgame.max_players == -1)){
                return;
        }

        // send information about this active game
        send_game_active_packet(&addr);
}

// sends information about netplayers in the game. if called on the server, broadcasts information about _all_ players
void send_netplayer_update_packet( net_player *pl )
{
        int packet_size,idx;
        ubyte data[MAX_PACKET_SIZE],val;

        BUILD_HEADER(NETPLAYER_UPDATE);

        // if I'm the server of the game, I should send an update for _all_players in the game
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                for(idx=0;idx<MAX_PLAYERS;idx++){
                        // only send info for connected players
                        if(MULTI_CONNECTED(Net_players[idx])){
                                // add a stop byte
                                val = 0x0;
                                ADD_DATA(val);

                                // add the net player's information
                                ADD_SHORT(Net_players[idx].player_id);
                                ADD_INT(Net_players[idx].state);
                                ADD_INT(Net_players[idx].p_info.ship_class);                            
                                ADD_INT(Net_players[idx].tracker_player_id);

                                if(Net_players[idx].flags & NETINFO_FLAG_HAS_CD){
                                        val = 1;
                                } else {
                                        val = 0;
                                }
                                ADD_DATA(val);                          
                        }
                }
                // add the final stop byte
                val = 0xff;
                ADD_DATA(val);

                // broadcast the packet
                if(!(Game_mode & GM_IN_MISSION)){
                        if ( pl == NULL ) {
                                multi_io_send_to_all_reliable(data, packet_size);                               
                        } else {
                                multi_io_send_reliable(pl, data, packet_size);
                        }
                } else {
                        if ( pl == NULL ) {
                                multi_io_send_to_all(data, packet_size);
                        } else {                                
                                multi_io_send(pl, data, packet_size);
                        }
                }
        } else {
                // add a stop byte
                val = 0x0;
                ADD_DATA(val);

                // add my current state in the netgame to this packet
                ADD_SHORT(Net_player->player_id);
                ADD_INT(Net_player->state);
                ADD_INT(Net_player->p_info.ship_class);         
                ADD_INT(Multi_tracker_id);

                // add if I have a CD or not
                if(Multi_has_cd){
                        val = 1;
                } else {
                        val = 0;
                }
                ADD_DATA(val);          

                // add a final stop byte
                val = 0xff;
                ADD_DATA(val);

                // send the packet to the server
                SDL_assert( pl == NULL );                                               // shouldn't ever be the case that pl is non-null here.
                if(!(Game_mode & GM_IN_MISSION)){                       
                        multi_io_send_reliable(Net_player, data, packet_size);
                } else {                        
                        multi_io_send(Net_player, data, packet_size);
                }
        }       
}

// process an incoming netplayer state update. if we're the server, we should rebroadcast
void process_netplayer_update_packet( ubyte *data, header *hinfo )
{
        int offset, player_num;
        net_player bogus;
        ubyte stop, has_cd;
        short player_id;
        int new_state;
        
        offset = HEADER_LENGTH;

        // get the first stop byte
        GET_DATA(stop);
        player_num = -1;
        while(stop != 0xff){
                // look the player up
                GET_SHORT(player_id);
                player_num = find_player_id(player_id);
                // if we couldn't find him, read in the bogus data
                if((player_num == -1) || (Net_player == &Net_players[player_num])){
                        GET_INT(bogus.state);
                        GET_INT(bogus.p_info.ship_class);                       
                        GET_INT(bogus.tracker_player_id);

                        GET_DATA(has_cd);                       
                } 
                // otherwise read in the data correctly
                else {
                        GET_INT(new_state);
                        GET_INT(Net_players[player_num].p_info.ship_class);                     
                        GET_INT(Net_players[player_num].tracker_player_id);
                        GET_DATA(has_cd);
                        if(has_cd){
                                Net_players[player_num].flags |= NETINFO_FLAG_HAS_CD;
                        } else {
                                Net_players[player_num].flags &= ~(NETINFO_FLAG_HAS_CD);
                        }                       

                        // if he's changing state to joined, send a team update
                        if((Net_players[player_num].state == NETPLAYER_STATE_JOINING) && (new_state == NETPLAYER_STATE_JOINED) && (Netgame.type_flags & NG_TYPE_TEAM)){
                                multi_team_send_update();
                        }

                        // set state
                        Net_players[player_num].state = new_state;
                }

                // get the next stop byte
                GET_DATA(stop);
        }

        PACKET_SET_SIZE();      

        // if I'm the host or the server of the game, update everyone else so things are synched up as tightly as possible
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                send_netplayer_update_packet(NULL);
        }

        // if i'm the standalone and this is an update from the host, maybe change some netgame settings
        if((Game_mode & GM_STANDALONE_SERVER) && (player_num != -1) && (Net_players[player_num].flags & NETINFO_FLAG_GAME_HOST)){
                switch(Net_players[player_num].state){
                case NETPLAYER_STATE_STD_HOST_SETUP:
                        Netgame.game_state = NETGAME_STATE_STD_HOST_SETUP;
                        break;
                
                case NETPLAYER_STATE_HOST_SETUP:
                        // check for race conditions
                        if(Netgame.game_state != NETGAME_STATE_MISSION_SYNC){
                                Netgame.game_state = NETGAME_STATE_FORMING;
                        }
                        break;          
                }
        }
}

#define EXTRA_DEATH_VAPORIZED           (1<<0)
#define EXTRA_DEATH_WASHED                      (1<<1)
// send a packet indicating a ship has been killed
void send_ship_kill_packet( object *objp, object *other_objp, float percent_killed, int self_destruct )
{
        int packet_size, model;
        ubyte data[MAX_PACKET_SIZE], was_player, extra_death_info, vaporized;
        ushort debris_signature;
        ubyte sd;
        polymodel * pm;

        // only sendable from the master
        SDL_assert ( Net_player->flags & NETINFO_FLAG_AM_MASTER );

        // special deaths
        vaporized = ( (Ships[objp->instance].flags & SF_VAPORIZE) > 0 );

        extra_death_info = 0; 
        if ( vaporized ) {
                extra_death_info |= EXTRA_DEATH_VAPORIZED;
        }

        if ( Ships[objp->instance].wash_killed ) {
                extra_death_info |= EXTRA_DEATH_WASHED;
        }

        // find out the next network signature that will be used for the debris pieces.
        model = Ships[objp->instance].modelnum;
        pm = model_get(model);
        debris_signature = 0;
        if ( pm && !vaporized ) {
                debris_signature = multi_get_next_network_signature( MULTI_SIG_DEBRIS );
                multi_set_network_signature( (ushort)(debris_signature + pm->num_debris_objects), MULTI_SIG_DEBRIS );
                Ships[objp->instance].arrival_distance = debris_signature;
        }

        BUILD_HEADER(SHIP_KILL);
        ADD_USHORT(objp->net_signature);

        // ships which are initially killed get the rest of the data sent.  self destructed ships and
        if ( other_objp == NULL ) {
                ushort temp;

                temp = 0;
                ADD_USHORT(temp);
                nprintf(("Network","Don't know other_obj for ship kill packet, sending NULL\n"));
        } else {
                ADD_USHORT( other_objp->net_signature );
        }

        ADD_USHORT( debris_signature );
        ADD_FLOAT( percent_killed );
        sd = (ubyte)self_destruct;
        ADD_DATA(sd);
        ADD_DATA( extra_death_info );

        // if the ship who died is a player, then send some extra info, like who killed him, etc.
        was_player = 0;
        if ( objp->flags & OF_PLAYER_SHIP ) {
                int pnum;
                char temp;

                pnum = multi_find_player_by_object( objp );
                if ( pnum != -1 ) {
                        was_player = 1;
                        ADD_DATA( was_player );

                        SDL_assert(Net_players[pnum].player->killer_objtype < CHAR_MAX); 
                        temp = (char)Net_players[pnum].player->killer_objtype;
                        ADD_DATA( temp );

                        SDL_assert(Net_players[pnum].player->killer_species < CHAR_MAX); 
                        temp = (char)Net_players[pnum].player->killer_species;
                        ADD_DATA( temp );

                        SDL_assert(Net_players[pnum].player->killer_weapon_index < CHAR_MAX); 
                        temp = (char)Net_players[pnum].player->killer_weapon_index;
                        ADD_DATA( temp );

                        ADD_STRING( Net_players[pnum].player->killer_parent_name );
                } else {
                        ADD_DATA( was_player );
                }
        } else {
                ADD_DATA( was_player );
        }

        // send the packet reliably!!!
        multi_io_send_to_all_reliable(data, packet_size);       
}

// process a packet indicating that a ship has been killed
void process_ship_kill_packet( ubyte *data, header *hinfo )
{
        int offset;
        ushort ship_sig, other_sig, debris_sig;
        object *sobjp, *oobjp;
        float percent_killed;   
        ubyte was_player, extra_death_info, sd;
        char killer_name[NAME_LENGTH], killer_objtype = OBJ_NONE, killer_species = SPECIES_TERRAN, killer_weapon_index = -1;

        offset = HEADER_LENGTH;
        GET_USHORT(ship_sig);

        GET_USHORT( other_sig );
        GET_USHORT( debris_sig );
        GET_FLOAT( percent_killed );
        GET_DATA( sd );
        GET_DATA( extra_death_info );
        GET_DATA( was_player );


        // pnum is >=0 when the dying ship is a pleyer ship.  Get the info about how he died
        if ( was_player != 0 ) {
                GET_DATA( killer_objtype );
                GET_DATA( killer_species );
                GET_DATA( killer_weapon_index );
                GET_STRING( killer_name );
        }

        PACKET_SET_SIZE();

        sobjp = multi_get_network_object( ship_sig );

        // if I am unable to find the ship object which was killed, I have to bail and rely on getting
        // another message from the server that this happened!
        if ( sobjp == NULL ) {
                nprintf(("Network", "Couldn't find net signature %d for kill packet\n", ship_sig));             
                return;
        }

        // set this ship's hull value to 0
        sobjp->hull_strength = 0.0f;

        // maybe set vaporized
        if (extra_death_info & EXTRA_DEATH_VAPORIZED) {
                Ships[sobjp->instance].flags |= SF_VAPORIZE;
        }

        // maybe set wash_killed
        if (extra_death_info & EXTRA_DEATH_VAPORIZED) {
                Ships[sobjp->instance].wash_killed = 1;
        }

        oobjp = multi_get_network_object( other_sig );

        if ( was_player != 0 ) {
                int pnum;

                pnum = multi_find_player_by_object( sobjp );
                if ( pnum != -1 ) {
                        Net_players[pnum].player->killer_objtype = killer_objtype;
                        Net_players[pnum].player->killer_species = killer_species;
                        Net_players[pnum].player->killer_weapon_index = killer_weapon_index;
                        SDL_strlcpy( Net_players[pnum].player->killer_parent_name, killer_name, NAME_LENGTH );
                }
        }          

        // check to see if I need to respawn myself
        multi_respawn_check(sobjp);

        // store the debris signature in the arrival distance which will never get used for player ships
        Ships[sobjp->instance].arrival_distance = debris_sig;

        // set this bit so that we don't accidentally start switching targets when we die
        if(sobjp == Player_obj){
                Game_mode |= GM_DEAD_DIED;
        }

        nprintf(("Network", "Killing off %s\n", Ships[sobjp->instance].ship_name));

        // do the normal thing when not ingame joining.  When ingame joining, simply kill off the ship.
        if ( !(Net_player->flags & NETINFO_FLAG_INGAME_JOIN) ) {
                ship_hit_kill( sobjp, oobjp, percent_killed, sd );
        } else {
                extern void ship_destroyed( int shipnum );
                ship_destroyed( sobjp->instance );
                sobjp->flags |= OF_SHOULD_BE_DEAD;
                obj_delete( OBJ_INDEX(sobjp) );
        }
}

// send a packet indicating a ship should be created
void send_ship_create_packet( object *objp, int is_support )
{
        int packet_size;
        ubyte data[MAX_PACKET_SIZE];

        // We will pass the ship to create by name.
        BUILD_HEADER(SHIP_CREATE);
        ADD_USHORT(objp->net_signature);
        ADD_INT( is_support );
        if ( is_support ){
                add_vector_data(data, &packet_size, objp->pos);
        }

        // broadcast the packet 
        multi_io_send_to_all_reliable(data, packet_size);
}

// process a packet indicating a ship should be created
void process_ship_create_packet( ubyte *data, header *hinfo )
{
        int offset, objnum, is_support;
        ushort signature;
        p_object *objp;
        vector pos = ZERO_VECTOR;

        SDL_assert ( !(Net_player->flags & NETINFO_FLAG_AM_MASTER) );
        offset = HEADER_LENGTH;
        GET_USHORT(signature);
        GET_INT( is_support );
        if ( is_support ){
                get_vector_data(data, &offset, pos);
        }

        PACKET_SET_SIZE();

        // find the name of this ship on ship ship arrival list.  if found, pass it to parse_object_create
        if ( !is_support ) {
                objp = mission_parse_get_arrival_ship( signature );
                if ( objp != NULL ) {
                        objnum = parse_create_object(objp);
                } else {
                        nprintf(("Network", "Ship with sig %d not found on ship arrival list -- not creating!!\n", signature));
                }
        } else {
                SDL_assert( Arriving_support_ship );
                if(Arriving_support_ship == NULL){
                        return;
                }
                Arriving_support_ship->pos = pos;
                Arriving_support_ship->net_signature = signature;
                objnum = parse_create_object( Arriving_support_ship );
                SDL_assert( objnum != -1 );
                if(objnum < 0){
                        mission_parse_support_arrived( objnum );
                }
        }
}

// send a packet indicating a wing of ships should be created
void send_wing_create_packet( wing *wingp, int num_to_create, int pre_create_count )
{
        int packet_size, index, ship_instance;
        ubyte data[MAX_PACKET_SIZE];
        ushort signature;
        int val;

        // for creating wing -- we just send the index into the wing array of this wing.
        // all players load the same mission, and so their array's should all match. We also
        // need to send the signature of the first ship that was created.  We can find this by
        // looking num_to_create places back in the ship_index field in the wing structure.

        index = WING_INDEX(wingp);
        ship_instance = wingp->ship_index[wingp->current_count - num_to_create];
        signature = Objects[Ships[ship_instance].objnum].net_signature;

        BUILD_HEADER( WING_CREATE );
        ADD_INT(index);
        ADD_INT(num_to_create);
        ADD_USHORT(signature);          
        ADD_INT(pre_create_count);
        val = wingp->current_wave - 1;
        ADD_INT(val);
        
        multi_io_send_to_all_reliable(data, packet_size);       
}

// process a packet saying that a wing should be created
void process_wing_create_packet( ubyte *data, header *hinfo )
{
        int offset, index, num_to_create;
        ushort signature;
        int total_arrived_count, current_wave;

        offset = HEADER_LENGTH;
        GET_INT(index);
        GET_INT(num_to_create);
        GET_USHORT(signature);
        GET_INT(total_arrived_count);
        GET_INT(current_wave);

        PACKET_SET_SIZE();

        // do a sanity check on the wing to be sure that we are actually working on a valid wing
        if ( (index < 0) || (index >= num_wings) || (Wings[index].num_waves == -1) ) {
                nprintf(("Network", "invalid index %d for wing create packet\n"));
                return;
        }
        if ( (num_to_create <= 0) || (num_to_create > Wings[index].wave_count) ) {
                nprintf(("Network", "Invalid number of ships to create (%d) for wing %s\n", num_to_create, Wings[index].name));
                return;
        }

        // bash some info
        Wings[index].current_count = 0;
        Wings[index].total_arrived_count = total_arrived_count;
        Wings[index].current_wave = current_wave;

        // set the network signature that was passed.  The client should create ships in the same order
        // as the server -- so all ships should get the same sigs as assigned by the server.  We also
        // need to set some timestamps and cues correctly to be sure that these things get created on
        // the clients correctly
        multi_set_network_signature( signature, MULTI_SIG_SHIP );
        parse_wing_create_ships( &Wings[index], num_to_create, 1 );
}

// packet indicating a ship is departing
void send_ship_depart_packet( object *objp )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;
        ushort signature;

        signature = objp->net_signature;

        BUILD_HEADER(SHIP_DEPART);
        ADD_USHORT( signature );
        
        multi_io_send_to_all_reliable(data, packet_size);
}

// process a packet indicating a ship is departing
void process_ship_depart_packet( ubyte *data, header *hinfo )
{
        int offset;
        object *objp;
        ushort signature;

        offset = HEADER_LENGTH;
        GET_USHORT( signature );
        PACKET_SET_SIZE();

        // find the object which is departing
        objp = multi_get_network_object( signature );
        if ( objp == NULL ) {
                nprintf(("network", "Couldn't find object with net signature %d to depart\n", signature ));
                return;
        }

        // start warping him out
        shipfx_warpout_start( objp );
}

// packet to tell clients cargo of a ship was revealed to all
void send_cargo_revealed_packet( ship *shipp )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;

        // build the header and add the data
        BUILD_HEADER(CARGO_REVEALED);
        ADD_USHORT( Objects[shipp->objnum].net_signature );

        // server sends to all players
        if(MULTIPLAYER_MASTER){         
                multi_io_send_to_all_reliable(data, packet_size);
        } 
        // clients just send to the server
        else {
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

// process a cargo revealed packet
void process_cargo_revealed_packet( ubyte *data, header *hinfo )
{
        int offset;
        ushort signature;
        object *objp;

        offset = HEADER_LENGTH;
        GET_USHORT(signature);
        PACKET_SET_SIZE();

        // get a ship pointer and call the ship function to reveal the cargo
        objp = multi_get_network_object( signature );
        if ( objp == NULL ) {
                nprintf(("Network", "Could not find object with net signature %d for cargo revealed\n", signature ));
                return;
        }

        // SDL_assert( objp->type == OBJ_SHIP );
        if((objp->type != OBJ_SHIP) || (objp->instance < 0) || (objp->instance >= MAX_SHIPS)){
                return;
        }

        // this will take care of re-routing to all other clients
        ship_do_cargo_revealed( &Ships[objp->instance], 1);     

        // server should rebroadcast
        if(MULTIPLAYER_MASTER){
                send_cargo_revealed_packet(&Ships[objp->instance]);
        }
}

// defines used for secondary fire packet
#define SFPF_ALLOW_SWARM                (1<<7)
#define SFPF_DUAL_FIRE                  (1<<6)
#define SFPF_TARGET_LOCKED              (1<<5)

// send a packet indicating a secondary weapon was fired
void send_secondary_fired_packet( ship *shipp, ushort starting_sig, int starting_count, int num_fired, int allow_swarm )
{
        int packet_size, net_player_num;
        ubyte data[MAX_PACKET_SIZE], sinfo, current_bank;
        object *objp;
        ushort target_signature;
        char t_subsys;
        ai_info *aip;

        // SDL_assert ( starting_count < UCHAR_MAX );

        // get the object for this ship.  If it is an AI object, send all the info to all player.  Otherwise,
        // we might send the info to the other player different than the one who fired
        objp = &Objects[shipp->objnum];
        if ( !(objp->flags & OF_PLAYER_SHIP) ) {
                if ( num_fired == 0 ) {
                        return;
                }
        }

        aip = &Ai_info[shipp->ai_index];

        current_bank = (ubyte)shipp->weapons.current_secondary_bank;
        //SDL_assert( (current_bank >= 0) && (current_bank < MAX_SECONDARY_BANKS) );    // always true

        // build up the header portion
        BUILD_HEADER( SECONDARY_FIRED_AI );

        ADD_USHORT( Objects[shipp->objnum].net_signature );
        ADD_USHORT( starting_sig );
        
        // add a couple of bits for swarm missiles and dual fire secondary weaspons
        sinfo = 0;

        sinfo = current_bank;

        if ( allow_swarm ){
                sinfo |= SFPF_ALLOW_SWARM;
        }

        if ( shipp->flags & SF_SECONDARY_DUAL_FIRE ){
                sinfo |= SFPF_DUAL_FIRE;
        }

        if ( aip->current_target_is_locked ){
                sinfo |= SFPF_TARGET_LOCKED;
        }

        ADD_DATA( sinfo );

        // add the ship's target and any targeted subsystem
        target_signature = 0;
        t_subsys = -1;
        if ( aip->target_objnum != -1) {
                target_signature = Objects[aip->target_objnum].net_signature;
                if ( (Objects[aip->target_objnum].type == OBJ_SHIP) && (aip->targeted_subsys != NULL) ) {
                        int s_index;

                        s_index = ship_get_index_from_subsys( aip->targeted_subsys, aip->target_objnum );
                        SDL_assert( s_index < CHAR_MAX );                       // better be less than this!!!!
                        t_subsys = (char)s_index;
                }

                if ( Objects[aip->target_objnum].type == OBJ_WEAPON ) {
                        SDL_assert(Weapon_info[Weapons[Objects[aip->target_objnum].instance].weapon_info_index].wi_flags & WIF_BOMB);
                }

        }

        ADD_USHORT( target_signature );
        ADD_DATA( t_subsys );

        // just send this packet to everyone, then bail if an AI ship fired.
        if ( !(objp->flags & OF_PLAYER_SHIP) ) {                
                multi_io_send_to_all(data, packet_size);
                return;
        }

        net_player_num = multi_find_player_by_object( objp );

        // getting here means a player fired.  Send the current packet to all players except the player
        // who fired.  If nothing got fired, then don't send to the other players -- we will just send
        // a packet to the player who will find out that he didn't fire anything
        if ( num_fired > 0 ) {
                multi_io_send_to_all_reliable(data, packet_size, &Net_players[net_player_num]);         
        }

        // if I (the master) fired, then return
        if ( Net_players[net_player_num].flags & NETINFO_FLAG_AM_MASTER ){
                return;
        }

        // now build up the packet to send to the player who actually fired.
        BUILD_HEADER( SECONDARY_FIRED_PLR );
        ADD_USHORT(starting_sig);
        ADD_DATA( sinfo );

        // add the targeting information so that the player's weapons will always home on the correct
        // ship
        ADD_USHORT( target_signature );
        ADD_DATA( t_subsys );
        
        multi_io_send_reliable(&Net_players[net_player_num], data, packet_size);
}

/// process a packet indicating a secondary weapon was fired
void process_secondary_fired_packet(ubyte* data, header* hinfo, int from_player)
{
        int offset, allow_swarm, target_objnum_save;
        ushort net_signature, starting_sig, target_signature;
        ubyte sinfo, current_bank;
        object* objp, *target_objp;
        ship *shipp;
        char t_subsys;
        ai_info *aip;
        ship_subsys *targeted_subsys_save;

        offset = HEADER_LENGTH; // size of the header

        // if from_player is false, it means that the secondary weapon info in this packet was
        // fired by an ai object (or another player).  from_player == 1 means tha me (the person
        // receiving this packet) fired the secondary weapon
        if ( !from_player ) {
                GET_USHORT( net_signature );
                GET_USHORT( starting_sig );
                GET_DATA( sinfo );                      // are we firing swarm missiles

                GET_USHORT( target_signature );
                GET_DATA( t_subsys );

                PACKET_SET_SIZE();

                // find the object (based on network signatures) for the object that fired
                objp = multi_get_network_object( net_signature );
                if ( objp == NULL ) {
                        nprintf(("Network", "Could not find ship for fire secondary packet!"));
                        return;
                }

                // set up the ships current secondary bank and that bank's mode.  Below, we will set the timeout
                // of the next fire time of this bank to 0 so we can fire right away
                shipp = &Ships[objp->instance];

        } else {
                GET_USHORT( starting_sig );
                GET_DATA( sinfo );

                GET_USHORT( target_signature );
                GET_DATA( t_subsys );

                PACKET_SET_SIZE();

                // get the object and ship
                objp = Player_obj;
                shipp = Player_ship;
        }

        // check the allow swarm bit
        allow_swarm = 0;
        if ( sinfo & SFPF_ALLOW_SWARM ){
                allow_swarm = 1;
        }

        // set the dual fire properties of the ship
        if ( sinfo & SFPF_DUAL_FIRE ){
                shipp->flags |= SF_SECONDARY_DUAL_FIRE;
        } else {
                shipp->flags &= ~SF_SECONDARY_DUAL_FIRE;
        }

        // determine whether current target is locked
        SDL_assert( shipp->ai_index != -1 );
        aip = &Ai_info[shipp->ai_index];
        if ( sinfo & SFPF_TARGET_LOCKED ) {
                aip->current_target_is_locked = 1;
        } else {
                aip->current_target_is_locked = 0;
        }

        // find out the current bank
        current_bank = (ubyte)(sinfo & 0x3);
        //SDL_assert( (current_bank >= 0) && (current_bank < MAX_SECONDARY_BANKS) );    // always true
        shipp->weapons.current_secondary_bank = current_bank;

        // make it so we can fire this ship's secondary bank immediately!!!
        shipp->weapons.next_secondary_fire_stamp[shipp->weapons.current_secondary_bank] = timestamp(0);
        shipp->weapons.detonate_weapon_time = timestamp(5000);          // be sure that we don't detonate a remote weapon before it is time.

        // set this ship's target and subsystem information.  We will save and restore target and
        // targeted subsystem so that we do not accidentally change targets for this player or
        // any AI ships on his system.
        target_objnum_save = aip->target_objnum;
        targeted_subsys_save = aip->targeted_subsys;

        // reset these variables for accuracy.  They will get reassigned at the end of this fuction
        aip->target_objnum = -1;
        aip->targeted_subsys = NULL;

        target_objp = multi_get_network_object( target_signature );
        if ( target_objp != NULL ) {
                aip->target_objnum = OBJ_INDEX(target_objp);

                if ( (t_subsys != -1) && (target_objp->type == OBJ_SHIP) ) {
                        aip->targeted_subsys = ship_get_indexed_subsys( &Ships[target_objp->instance], t_subsys);
                }
        }

        if ( starting_sig != 0 ){
                multi_set_network_signature( starting_sig, MULTI_SIG_NON_PERMANENT );
        } else {
                shipp->weapons.detonate_weapon_time = timestamp(0);             // signature of -1 say detonate remote weapon
        }

        ship_fire_secondary( objp, allow_swarm );

        // restore targeted object and targeted subsystem
        aip->target_objnum = target_objnum_save;
        aip->targeted_subsys = targeted_subsys_save;
}

// send a packet indicating a countermeasure was fired
void send_countermeasure_fired_packet( object *objp, int cmeasure_count, int rand_val )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;

        Int3();

        SDL_assert ( cmeasure_count < UCHAR_MAX );
        BUILD_HEADER(COUNTERMEASURE_FIRED);
        ADD_USHORT( objp->net_signature );
        ADD_INT( rand_val );
                
        multi_io_send_to_all(data, packet_size);
}

// process a packet indicating a countermeasure was fired
void process_countermeasure_fired_packet( ubyte *data, header *hinfo )
{
        int offset, rand_val;
        ushort signature;
        object *objp;

        Int3();

        offset = HEADER_LENGTH; 

        GET_USHORT( signature );
        GET_INT( rand_val );
        PACKET_SET_SIZE();

        objp = multi_get_network_object( signature );
        if ( objp == NULL ) {
                nprintf(("network", "Could find object whose countermeasures are being launched!!!\n"));
                return;
        }
        if(objp->type != OBJ_SHIP){
                return;
        }
        // SDL_assert ( objp->type == OBJ_SHIP );

        // make it so ship can fire right away!
        Ships[objp->instance].cmeasure_fire_stamp = timestamp(0);
        if ( objp == Player_obj ){
                nprintf(("network", "firing countermeasure from my ship\n"));
        }

        ship_launch_countermeasure( objp, rand_val );           
}

// send a packet indicating that a turret has been fired
void send_turret_fired_packet( int ship_objnum, int subsys_index, int weapon_objnum )
{
        int packet_size;
        ushort pnet_signature;
        ubyte data[MAX_PACKET_SIZE], cindex;
        object *objp;
        ubyte has_sig = 0;
        ship_subsys *ssp;
        short val;

        // sanity
        if((weapon_objnum < 0) || (Objects[weapon_objnum].type != OBJ_WEAPON) || (Objects[weapon_objnum].instance < 0) || (Weapons[Objects[weapon_objnum].instance].weapon_info_index < 0)){
                return;
        }

        // local setup -- be sure we are actually passing a weapon!!!!
        objp = &Objects[weapon_objnum];
        SDL_assert ( objp->type == OBJ_WEAPON );
        if(Weapon_info[Weapons[objp->instance].weapon_info_index].subtype == WP_MISSILE){
                has_sig = 1;
        }

        pnet_signature = Objects[ship_objnum].net_signature;

        SDL_assert( subsys_index < UCHAR_MAX );
        cindex = (ubyte)subsys_index;

        ssp = ship_get_indexed_subsys( &Ships[Objects[ship_objnum].instance], subsys_index, NULL );
        if(ssp == NULL){
                return;
        }

        // build the fire turret packet.  
        BUILD_HEADER(FIRE_TURRET_WEAPON);       
        packet_size += multi_pack_unpack_position(1, data + packet_size, &objp->orient.v.fvec);
        ADD_DATA( has_sig );
        ADD_USHORT( pnet_signature );   
        if(has_sig){            
                ADD_USHORT( objp->net_signature );
        }
        ADD_DATA( cindex );
        val = (short)ssp->submodel_info_1.angs.h;
        ADD_SHORT( val );
        val = (short)ssp->submodel_info_2.angs.p;
        ADD_SHORT( val );       
        
        multi_io_send_to_all(data, packet_size);

        multi_rate_add(1, "tur", packet_size);
}

// process a packet indicating a turret has been fired
void process_turret_fired_packet( ubyte *data, header *hinfo )
{
        int offset, weapon_objnum, wid;
        ushort pnet_signature, wnet_signature;
        vector pos, temp;
        matrix orient;
        vector o_fvec;
        ubyte turret_index;
        object *objp;
        ship_subsys *ssp;
        ubyte has_sig = 0;
        ship *shipp;
        short pitch, heading;   

        // get the data for the turret fired packet
        offset = HEADER_LENGTH; 
        offset += multi_pack_unpack_position(0, data + offset, &o_fvec);        
        GET_DATA( has_sig );
        GET_USHORT( pnet_signature );
        if(has_sig){
                GET_USHORT( wnet_signature );
        } else {
                wnet_signature = 0;
        }
        GET_DATA( turret_index );
        GET_SHORT( heading );
        GET_SHORT( pitch );     
        PACKET_SET_SIZE();                              // move our counter forward the number of bytes we have read

        // find the object
        objp = multi_get_network_object( pnet_signature );
        if ( objp == NULL ) {
                nprintf(("network", "could find parent object with net signature %d for turret firing\n", pnet_signature));
                return;
        }

        // if this isn't a ship, do nothing
        if ( objp->type != OBJ_SHIP ){
                return;
        }

        // make an orientation matrix from the o_fvec
        vm_vector_2_matrix(&orient, &o_fvec, NULL, NULL);

        // find this turret, and set the position of the turret that just fired to be where it fired.  Quite a
        // hack, but should be suitable.
        shipp = &Ships[objp->instance];
        ssp = ship_get_indexed_subsys( shipp, turret_index, NULL );
        if(ssp == NULL){
                return;
        }
        wid = ssp->system_info->turret_weapon_type;

        // bash the position and orientation of the turret
        ssp->submodel_info_1.angs.h = (float)heading;
        ssp->submodel_info_2.angs.p = (float)pitch;

        // get the world position of the weapon
        ship_get_global_turret_info(objp, ssp->system_info, &pos, &temp);

        // create the weapon object
        if(wnet_signature != 0){                
                multi_set_network_signature( wnet_signature, MULTI_SIG_NON_PERMANENT );
        }
        weapon_objnum = weapon_create( &pos, &orient, wid, OBJ_INDEX(objp), 0, -1, 1);
        if (weapon_objnum != -1) {
                if ( Weapon_info[wid].launch_snd != -1 ) {
                        snd_play_3d( &Snds[Weapon_info[wid].launch_snd], &pos, &View_position );
                }               
        }
}

// send a mission log item packet
void send_mission_log_packet( int num )
{
        int packet_size;
        ubyte data[MAX_PACKET_SIZE];
        ubyte type;
        ushort sindex;
        log_entry *entry;

        SDL_assert ( (Game_mode & GM_MULTIPLAYER) && (Net_player->flags & NETINFO_FLAG_AM_MASTER) );

        // get the data from the log
        entry = &log_entries[num];
        type = (ubyte)entry->type;                      // do the type casting thing to save on packet space
        sindex = (ushort)entry->index;

        BUILD_HEADER(MISSION_LOG_ENTRY);
        ADD_DATA(type);
        ADD_INT(entry->flags);
        ADD_USHORT(sindex);
        ADD_DATA(entry->timestamp);
        ADD_STRING(entry->pname);
        ADD_STRING(entry->sname);

        // broadcast the packet to all players  
        multi_io_send_to_all_reliable(data, packet_size);
}

// process a mission log item packet
void process_mission_log_packet( ubyte *data, header *hinfo )
{
        int offset, flags;
        ushort sindex;
        ubyte type;
        char pname[NAME_LENGTH], sname[NAME_LENGTH];
        fix timestamp;

        SDL_assert ( (Game_mode & GM_MULTIPLAYER) && !(Net_player->flags & NETINFO_FLAG_AM_MASTER) );

        offset = HEADER_LENGTH;
        GET_DATA(type);
        GET_INT(flags);
        GET_USHORT(sindex);
        GET_DATA(timestamp);
        GET_STRING(pname);
        GET_STRING(sname);

        PACKET_SET_SIZE();

        mission_log_add_entry_multi( type, pname, sname, sindex, timestamp, flags );
}

// send a mission message packet
void send_mission_message_packet( int id, const char *who_from, int priority, int timing, int source, int builtin_type, int multi_target, int multi_team_filter)
{
        int packet_size;
        ubyte data[MAX_PACKET_SIZE], up, us, utime;
        
        SDL_assert ( Net_player->flags & NETINFO_FLAG_AM_MASTER );
        SDL_assert ( (priority >= 0) && (priority < UCHAR_MAX) );
        SDL_assert ( (timing >= 0) && (timing < UCHAR_MAX) );   
        
        up = (ubyte) priority;
        us = (ubyte) source;
        utime = (ubyte)timing;

        BUILD_HEADER(MISSION_MESSAGE);
        ADD_INT(id);
        ADD_STRING(who_from);
        ADD_DATA(up);
        ADD_DATA(utime);
        ADD_DATA(us);
        ADD_INT(builtin_type);
        ADD_INT(multi_team_filter);

        if (multi_target == -1){                
                multi_io_send_to_all_reliable(data, packet_size);
        } else {                
                multi_io_send_reliable(&Net_players[multi_target], data, packet_size);
        }
}

// process a mission message packet
void process_mission_message_packet( ubyte *data, header *hinfo )
{
        int offset, id, builtin_type;
        ubyte priority, source, utiming;
        char who_from[NAME_LENGTH];
        int multi_team_filter;

        SDL_assert( !(Net_player->flags & NETINFO_FLAG_AM_MASTER) );

        offset = HEADER_LENGTH;
        GET_INT(id);
        GET_STRING(who_from);
        GET_DATA(priority);
        GET_DATA(utiming);
        GET_DATA(source);
        GET_INT(builtin_type);
        GET_INT(multi_team_filter);

        PACKET_SET_SIZE();

        // filter out builtin ones in TvT
        if((builtin_type >= 0) && (Netgame.type_flags & NG_TYPE_TEAM) && (Net_player != NULL) && (Net_player->p_info.team != multi_team_filter)){
                return;
        }

        // maybe filter this out
        if(!message_filter_multi(id)){
                // send the message as if it came from an sexpression
                message_queue_message( id, priority, utiming, who_from, source, 0, 0, builtin_type );
        }
}

// just send them a pong back as fast as possible
void process_ping_packet(ubyte *data, header *hinfo)
{
   net_addr addr;
        int offset;

        offset = HEADER_LENGTH;
        PACKET_SET_SIZE();

        // get the address to return the pong to
        fill_net_addr(&addr, hinfo->addr, hinfo->net_id, hinfo->port);  
                    
        // send the pong
        send_pong(&addr);       
}

// right now it just routes the pong through to the standalone gui, which is the only
// system which uses ping and pong right now.
void process_pong_packet(ubyte *data, header *hinfo)
{
        net_player *p;
        net_addr addr;
        int offset,lookup;
        
        offset = HEADER_LENGTH;

        fill_net_addr(&addr, hinfo->addr, hinfo->net_id, hinfo->port);
                
        PACKET_SET_SIZE();      
                
        // if we're connected , see who sent us this pong
        if(Net_player->flags & NETINFO_FLAG_CONNECTED){
                lookup = find_player_id(hinfo->id);
                if(lookup == -1){
                        return;
                }
                
                p = &Net_players[lookup]; 

                // evaluate the ping
                multi_ping_eval_pong(&Net_players[lookup].s_info.ping);
                        
                // put in calls to any functions which may want to know about the ping times from 
                // this guy
                if(Game_mode & GM_STANDALONE_SERVER){
                   std_update_player_ping(p);   
                }

                // mark his socket as still alive (extra precaution)
                psnet_mark_received(Net_players[lookup].reliable_socket);
        }
        // otherwise, do any special processing
        else {
                // if we're in the join game state, see if this pong came from a server on our
                // list
                if(gameseq_get_state() == GS_STATE_MULTI_JOIN_GAME){
                        multi_join_eval_pong(&addr, timer_get_fixed_seconds());
                }
        }
}

// send a ping packet
void send_ping(net_addr *addr)
{
        unsigned char data[8];
        int packet_size;

        // build the header and send the packet
        BUILD_HEADER( PING );           
        psnet_send(addr, &data[0], packet_size);
}

// send a pong packet
void send_pong(net_addr *addr)
{
   unsigned char data[8];
        int packet_size;        

        // build the header and send the packet
        BUILD_HEADER(PONG);             
        psnet_send(addr, &data[0], packet_size);   
}

// sent from host to master. give me the list of missions you have.
// this will be used only in a standalone mode
void send_mission_list_request( int what )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;

        // build the header and ask for a list of missions or campaigns (depending
        // on the 'what' flag).
        BUILD_HEADER(MISSION_REQUEST);
                
        multi_io_send_reliable(Net_player, data, packet_size);
}

// maximum number of bytes that we can send in a mission items packet.
#define MAX_MISSION_ITEMS_BYTES (MAX_PACKET_SIZE - (sizeof(multi_create_info) + 1) )

// defines used to tell what type of packets are being sent
#define MISSION_LIST_ITEMS                      1
#define CAMPAIGN_LIST_ITEMS             2

// send an individual mission file item
void send_mission_items( net_player *pl )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size, i;
        ubyte stop, type;

        // build the header     
        BUILD_HEADER(MISSION_ITEM);     

        // send the list of missions and campaigns avilable on the server.  Stop when
        // reaching a certain maximum
        type = MISSION_LIST_ITEMS;
        ADD_DATA( type );
        for (i = 0; i < Multi_create_mission_count; i++ ) {             
                stop = 0;
                ADD_DATA( stop );

                ADD_STRING( Multi_create_mission_list[i].filename );
                ADD_STRING( Multi_create_mission_list[i].name );
                ADD_INT( Multi_create_mission_list[i].flags );
                ADD_DATA( Multi_create_mission_list[i].max_players );
                ADD_UINT( Multi_create_mission_list[i].respawn );               

                // STANDALONE_ONLY              
                ADD_DATA( Multi_create_mission_list[i].valid_status );

                if ( packet_size > (int)MAX_MISSION_ITEMS_BYTES ) {
                        stop = 1;
                        ADD_DATA( stop );                       
                        multi_io_send_reliable(pl, data, packet_size);
                        BUILD_HEADER( MISSION_ITEM );
                        ADD_DATA( type );
                }               
        }
        stop = 1;
        ADD_DATA(stop); 
        multi_io_send_reliable(pl, data, packet_size);

        // send the campaign information
        type = CAMPAIGN_LIST_ITEMS;
        BUILD_HEADER(MISSION_ITEM);
        ADD_DATA( type );
        for (i = 0; i < Multi_create_campaign_count; i++ ) {            
                stop = 0;
                ADD_DATA( stop );

                ADD_STRING( Multi_create_campaign_list[i].filename );
                ADD_STRING( Multi_create_campaign_list[i].name );
                ADD_INT( Multi_create_campaign_list[i].flags ); 
                ADD_DATA( Multi_create_campaign_list[i].max_players );          

                if ( packet_size > (int)MAX_MISSION_ITEMS_BYTES ) {
                        stop = 1;
                        ADD_DATA( stop );                       
                        multi_io_send_reliable(pl, data, packet_size);
                        BUILD_HEADER( MISSION_ITEM );
                        ADD_DATA( type );
                }               
        }
        stop = 1;
        ADD_DATA(stop); 
        multi_io_send_reliable(pl, data, packet_size);
}

// process a request for a list of missions
void process_mission_request_packet(ubyte *data, header *hinfo)
{   
        int player_num,offset;  
        
        offset = HEADER_LENGTH;
        PACKET_SET_SIZE();

        // fill in the address information of where this came from      
        player_num = find_player_id(hinfo->id);
        if(player_num == -1){
                nprintf(("Network","Could not find player to send mission list items to!\n"));
                return;
        }

        send_mission_items( &Net_players[player_num] );
}

// process an individual mission file item
void process_mission_item_packet(ubyte *data,header *hinfo)
{
   int offset, flags;           
        char filename[MAX_FILENAME_LEN], name[NAME_LENGTH], valid_status;
        ubyte stop, type,max_players;
        uint respawn;

        SDL_assert(gameseq_get_state() == GS_STATE_MULTI_HOST_SETUP);
        offset = HEADER_LENGTH;

        GET_DATA( type );
        GET_DATA(stop);
        while( !stop ) {
                GET_STRING( filename );
                GET_STRING( name );
                GET_INT( flags );
                GET_DATA( max_players );

                // missions also have respawns and a crc32 associated with them
                if(type == MISSION_LIST_ITEMS){
                        GET_UINT(respawn);

                        // STANDALONE_ONLY                      
                        GET_DATA(valid_status);

                        if ( Multi_create_mission_count < MULTI_CREATE_MAX_LIST_ITEMS ) {
                                SDL_strlcpy(Multi_create_mission_list[Multi_create_mission_count].filename, filename, MAX_FILENAME_LEN );
                                SDL_strlcpy(Multi_create_mission_list[Multi_create_mission_count].name, name, NAME_LENGTH );
                                Multi_create_mission_list[Multi_create_mission_count].flags = flags;
                                Multi_create_mission_list[Multi_create_mission_count].respawn = respawn;
                                Multi_create_mission_list[Multi_create_mission_count].max_players = max_players;

                                // STANDALONE_ONLY                              
                                Multi_create_mission_list[Multi_create_mission_count].valid_status = valid_status;

                                Multi_create_mission_count++;
                        }
                } else if ( type == CAMPAIGN_LIST_ITEMS ) {
                        if ( Multi_create_campaign_count < MULTI_CREATE_MAX_LIST_ITEMS ) {
                                SDL_strlcpy(Multi_create_campaign_list[Multi_create_campaign_count].filename, filename, MAX_FILENAME_LEN );
                                SDL_strlcpy(Multi_create_campaign_list[Multi_create_campaign_count].name, name, NAME_LENGTH );
                                Multi_create_campaign_list[Multi_create_campaign_count].flags = flags;
                                Multi_create_campaign_list[Multi_create_campaign_count].respawn = 0;
                                Multi_create_campaign_list[Multi_create_campaign_count].max_players = max_players;
                                Multi_create_campaign_count++;
                        }
                }

                GET_DATA( stop );
        }
        
        PACKET_SET_SIZE();      

        // this will cause whatever list to get resorted (although they should be appearing in order)
        multi_create_setup_list_data(-1);               
}

// send a request to the server to pause or unpause the game
void send_multi_pause_packet(int pause)
{
        ubyte data[MAX_PACKET_SIZE];
        ubyte val;
        int packet_size = 0;
        
        SDL_assert(!(Net_player->flags & NETINFO_FLAG_AM_MASTER));
        
        // build the header
        BUILD_HEADER(MULTI_PAUSE_REQUEST);
        val = (ubyte) pause;
        
        // add the pause info
        ADD_DATA(val);  

        // send the request to the server       
        multi_io_send_reliable(Net_player, data, packet_size);
}

// process a pause update packet (pause, unpause, etc)
void process_multi_pause_packet(ubyte *data, header *hinfo)
{
        int offset;
        ubyte val;              
        int player_index;

        offset = HEADER_LENGTH;

        // get the data
        GET_DATA(val);  
        PACKET_SET_SIZE();

        // get who sent the packet      
        player_index = find_player_id(hinfo->id);
        // if we don't know who sent the packet, don't do anything
        if(player_index == -1){
                return;
        }

        // if we're the server, we should evaluate whether this guy is allowed to send the packet
        multi_pause_server_eval_request(&Net_players[player_index],(int)val);   
}

// send a game information update
void send_game_info_packet()
{
        int packet_size;
        ubyte data[MAX_PACKET_SIZE], paused;

        // set the paused variable
        paused = (ubyte)((Netgame.game_state == NETGAME_STATE_PAUSED)?1:0);

        BUILD_HEADER(GAME_INFO);
        ADD_INT( Missiontime );
        ADD_DATA( paused );
        
        multi_io_send_to_all(data, packet_size);
}

// process a game information update
void process_game_info_packet( ubyte *data, header *hinfo )
{
        int offset;
        fix mission_time;
        ubyte paused;

        offset = HEADER_LENGTH;

        // get the mission time -- we should examine our time and the time from the server.  If off by some delta
        // time, set our time to server time (should take ping time into account!!!)
        GET_DATA( mission_time );
        GET_DATA( paused );
        PACKET_SET_SIZE();      
}

// send an ingame nak packet
void send_ingame_nak(int state, net_player *p)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;
        packet_size = 0;
        BUILD_HEADER(INGAME_NAK);

        ADD_INT(state);
                
        multi_io_send_reliable(p, data, packet_size);
}

// process an ingame nak packet
void process_ingame_nak(ubyte *data, header *hinfo)
{
        int offset,state,pid;   
        net_player *pl;

        offset = HEADER_LENGTH;
        GET_INT(state); 
        PACKET_SET_SIZE();
        
   pid = find_player_id(hinfo->id);
        if(pid < 0){
                return;
        }
        pl = &Net_players[pid];
        
        switch(state){
        case ACK_FILE_ACCEPTED :
                SDL_assert(pl->flags & NETINFO_FLAG_INGAME_JOIN);
                nprintf(("Network","Mission file rejected by server, aborting...\n"));
                multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_FILE_REJECTED);           
                break;
        }       
}

// send a packet telling players to end the mission
void send_endgame_packet(net_player *pl)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;
        
        packet_size = 0;
        BUILD_HEADER(MISSION_END);      

        // sending to a specific player?
        if(pl != NULL){
                SDL_assert(Net_player->flags & NETINFO_FLAG_AM_MASTER);
                multi_io_send_reliable(pl, data, packet_size);
                return;
        }

        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){         
                // send all player stats here
                multi_broadcast_stats(STATS_MISSION);           

                // if in dogfight mode, send all dogfight stats as well
                ml_string("Before dogfight stats!");
                if(Netgame.type_flags & NG_TYPE_DOGFIGHT){
                        ml_string("Sending dogfight stats!");

                        multi_broadcast_stats(STATS_DOGFIGHT_KILLS);
                }
                ml_string("After dogfight stats!");

                // tell everyone to leave the game              
                multi_io_send_to_all_reliable(data, packet_size);
        } else {
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

// process a packet indicating we should end the current mission
void process_endgame_packet(ubyte *data, header *hinfo)
{
        int offset;     
        int player_num;
                        
        offset = HEADER_LENGTH;
        
        PACKET_SET_SIZE();

        ml_string("Receiving endgame packet");
        
        // if I'm the server, I should evaluate whether the sender is authorized to end the game
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                // determine who this came from and make sure he is allowed to end the game             
                player_num = find_player_id(hinfo->id);
                SDL_assert(player_num != -1);
                if(player_num < 0){
                        return;
                }

                // if the player is allowed to end the mission
                if(!multi_can_end_mission(&Net_players[player_num])){
                        return;
                }               

                // act as if we hit alt+j locally 
                multi_handle_end_mission_request();
        }
        // all clients process immediately
        else {
                // ingame joiners should quit when they receive an endgame packet since the game is over
                if(Net_player->flags & NETINFO_FLAG_INGAME_JOIN){
                        multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_EARLY_END);
                        return;
                }

                // do any special processing for being in a state other than the gameplay state
                multi_handle_state_special();

                // make sure we're not already in the debrief state
                if((gameseq_get_state() != GS_STATE_DEBRIEF) && (gameseq_get_state() != GS_STATE_MULTI_DOGFIGHT_DEBRIEF)){
                        multi_warpout_all_players();                    
                }
        }       
}

// send a position/orientation update for myself (if I'm an observer)
void send_observer_update_packet()
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;
        int ret;
        ushort target_sig;
        
        // its possible for the master to be an observer if has run out of respawns. In this case, he doesn't need
        // to send any update packets to anyone.
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                return;
        }

        if((Player_obj == NULL) || (Player_obj->type != OBJ_OBSERVER) || (Net_player == NULL) || !(Net_player->flags & NETINFO_FLAG_OBSERVER)){
                return;
        }

        packet_size = 0;
        
        BUILD_HEADER(OBSERVER_UPDATE);

        ret = multi_pack_unpack_position( 1, data + packet_size, &Player_obj->pos );
        packet_size += ret;
        ret = multi_pack_unpack_orient( 1, data + packet_size, &Player_obj->orient );
        packet_size += ret;

        // add targeting infomation
        if((Player_ai != NULL) && (Player_ai->target_objnum >= 0)){
                target_sig = Objects[Player_ai->target_objnum].net_signature;
        } else {
                target_sig = 0;
        }
        ADD_USHORT(target_sig);
        
        multi_io_send(Net_player, data, packet_size);
}

// process a position/orientation update from an observer
void process_observer_update_packet(ubyte *data, header *hinfo)
{
        int offset,ret;
        int obs_num;
        vector g_vec;
        matrix g_mat;
        physics_info bogus_pi;  
        ushort target_sig;
        object *target_obj;
        offset = HEADER_LENGTH;

        obs_num = find_player_id(hinfo->id);
        
        memset(&bogus_pi,0,sizeof(physics_info));
        ret = multi_pack_unpack_position( 0, data + offset, &g_vec );
        offset += ret;
        ret = multi_pack_unpack_orient( 0, data + offset, &g_mat );
        offset += ret;

        // targeting information
        GET_USHORT(target_sig); 
        PACKET_SET_SIZE();      

        if((obs_num < 0) || (Net_players[obs_num].player->objnum < 0)){
                return;
        }

        // set targeting info
        if(target_sig == 0){
                Net_players[obs_num].s_info.target_objnum = -1;
        } else {
                target_obj = multi_get_network_object(target_sig);
                Net_players[obs_num].s_info.target_objnum = (target_obj == NULL) ? -1 : OBJ_INDEX(target_obj);
        }

        Objects[Net_players[obs_num].player->objnum].pos = g_vec;
        Objects[Net_players[obs_num].player->objnum].orient = g_mat;
        Net_players[obs_num].s_info.eye_pos = g_vec;
        Net_players[obs_num].s_info.eye_orient = g_mat;
}

void send_netplayer_slot_packet()
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size,idx;
        ubyte stop;

        packet_size = 0;
        stop = 0xff;
   BUILD_HEADER(NETPLAYER_SLOTS_P);
   for(idx=0;idx<MAX_PLAYERS;idx++){
                if( MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && !MULTI_OBSERVER(Net_players[idx])){
                        ADD_DATA(stop);
                        ADD_SHORT(Net_players[idx].player_id);  
                        ADD_USHORT(Objects[Net_players[idx].player->objnum].net_signature);
                        ADD_INT(Net_players[idx].p_info.ship_class);
                        ADD_INT(Net_players[idx].p_info.ship_index);                    
                }
        }
        stop = 0x0;
        ADD_DATA(stop);
                
        // standalone case or not
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){         
                multi_io_send_to_all_reliable(data, packet_size);
        } else {
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

void process_netplayer_slot_packet(ubyte *data, header *hinfo)
{
        int offset;
        int player_num,ship_class,ship_index;
        ushort net_sig;
        object *objp;   
        ubyte stop;
        short player_id;
        
        offset = HEADER_LENGTH; 

   // first untag all of the player ships and make them OF_COULD_BE_PLAYER
        multi_untag_player_ships();

        GET_DATA(stop);
        while(stop != 0x0){
                GET_SHORT(player_id);
                GET_USHORT(net_sig);
                GET_INT(ship_class);
                GET_INT(ship_index);
                player_num = find_player_id(player_id);
                if(player_num < 0){
                        nprintf(("Network","Error looking up player for object/slot assignment!!\n"));
                } else {
                        // call the function in multiutil.cpp to set up the player object stuff
                        // being careful not to muck with the standalone object
                        if(!((player_num == 0) && (Game_mode & GM_STANDALONE_SERVER))){
                                objp = multi_get_network_object(net_sig);
                                SDL_assert(objp != NULL);
                                multi_assign_player_ship( player_num, objp, ship_class );
                                Net_players[player_num].p_info.ship_index = ship_index;
                                objp->flags &= ~(OF_COULD_BE_PLAYER);
                                objp->flags |= OF_PLAYER_SHIP;
                        }
                }
                GET_DATA(stop);
        }
        PACKET_SET_SIZE();

        // standalone should forward the packet and wait for a response
        if(Game_mode & GM_STANDALONE_SERVER){
                send_netplayer_slot_packet();
        } 

        Net_player->state = NETPLAYER_STATE_SLOT_ACK;
        send_netplayer_update_packet(); 
}

// two functions to deal with ships changing their primary/secondary weapon status.  'what' indicates
// if this change is a primary or secondary change.  new_bank is the new current primary/secondary
// bank, link_status is whether primaries are linked or not, or secondaries are dual fire or not
void send_ship_weapon_change( ship *shipp, int what, int new_bank, int link_status )
{
        ubyte data[MAX_PACKET_SIZE], utmp;
        int packet_size;

        BUILD_HEADER(SHIP_WSTATE_CHANGE);
        ADD_USHORT( Objects[shipp->objnum].net_signature );
        utmp = (ubyte)(what);
        ADD_DATA( utmp );
        utmp = (ubyte)(new_bank);
        ADD_DATA( utmp );
        utmp = (ubyte)(link_status);
        ADD_DATA( utmp );

        // Removed the above psnet_send() call - it didn't appear to do anything since it was called only from the server anyway - DB   
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_ship_weapon_change( ubyte *data, header *hinfo )
{
        int offset;
        ushort signature;
        ubyte what, new_bank, link_status;
        object *objp;
        ship *shipp;

        offset = HEADER_LENGTH;
        GET_USHORT( signature );
        GET_DATA( what );
        GET_DATA( new_bank );
        GET_DATA( link_status );
        PACKET_SET_SIZE();

        objp = multi_get_network_object( signature );
        if ( objp == NULL ) {
                nprintf(("network", "Unable to locate ship with signature %d for weapon state change\n", signature));
                return;
        }
        // SDL_assert( objp->type == OBJ_SHIP );
        if(objp->type != OBJ_SHIP){
                return;
        }

        // if this is my data, do nothing since I already have my own data
        if ( objp == Player_obj ){
                return;
        }

        // now, get the ship and set the new bank and link modes based on the 'what' value
        shipp = &Ships[objp->instance];
        if ( what == MULTI_PRIMARY_CHANGED ) {
                shipp->weapons.current_primary_bank = new_bank;
                if ( link_status ){
                        shipp->flags |= SF_PRIMARY_LINKED;
                } else {
                        shipp->flags &= ~SF_PRIMARY_LINKED;
                }
        } else {
                shipp->weapons.current_secondary_bank = new_bank;
                if ( link_status ){
                        shipp->flags |= SF_SECONDARY_DUAL_FIRE;
                } else {
                        shipp->flags &= ~SF_SECONDARY_DUAL_FIRE;
                }
        }
}
        
        // ship status change procedure
// 1.) <client> - Client runs through the normal button_function procedure. Any remaining control bits are implied as being
//                server critical.
// 2.) <client> - Client puts this button_info item into his last_buttons array and sends a bunch of SHIP_STATUS packets 
//                for added redundancy.
// 3.) <server> - Receives the packet. Checks to see if the net_player on his side already has this one defined. If so, it
//                ignores as a repeat packet. Otherwise it puts it in the last_buttons array for the net_player
// 4.) <server> - Server applies the command on his side (with multi_apply_ship_status(...) and sends the ack (also a SHIP_STATUS) 
//                back to the client. Also sends multiple times for redundancy
// 5.) <client> - Receives the packet back. Does a lookup into his last_buttons array. If he finds the match, apply the functions
//                and remove the item from the list. If no match is found it means that either he has received an ack, has acted
//                on it and removed it, or that it has been "timed out" and replaced by a newer button_info.

#define SHIP_STATUS_REPEAT 2
void send_ship_status_packet(net_player *pl, button_info *bi, int id)
{
        int idx, temp;
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        if(pl == NULL){
                return;
        }

        BUILD_HEADER(SHIP_STATUS_CHANGE);
        ADD_INT(id);
        for(idx=0;idx<NUM_BUTTON_FIELDS;idx++){
                temp = bi->status[idx];
                ADD_INT(temp);
        }
        
   // server should send reliably (response packet)
        if(MULTIPLAYER_MASTER){         
                multi_io_send_reliable(pl, data, packet_size);
        } else {
                multi_io_send(pl, data, packet_size);
        }
}

void process_ship_status_packet(ubyte *data, header *hinfo)
{
   int idx;
        int offset;
        int player_num,unique_id;
        button_info bi;
        int i_tmp;
        
        offset = HEADER_LENGTH;

        // zero out the button info structure for good measure
        memset(&bi,0,sizeof(button_info));
        
        // read the button-info
        GET_INT(unique_id);     
                
        for(idx=0;idx<NUM_BUTTON_FIELDS;idx++){
                GET_INT(i_tmp);
                bi.status[idx] = i_tmp;
        }

        PACKET_SET_SIZE();

   // this will be handled differently client and server side. Duh.
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){                  // SERVER SIDE
                // find which net-player has sent us butotn information         
      player_num = find_player_id(hinfo->id);
                SDL_assert(player_num >= 0);
                if(player_num < 0){
                        return;
                }

                // don't process critical button information for observers
                // its a new button_info for this guy. apply and ack
                if(!MULTI_OBSERVER(Net_players[player_num]) && !lookup_ship_status(&Net_players[player_num],unique_id)){        
                        // mark that he's pressed this button
         // add_net_button_info(&Net_players[player_num], &bi, unique_id);
                        
                        // send a return packet
         send_ship_status_packet(&Net_players[player_num], &bi,unique_id);
                        
                        // apply the button presses to his ship as normal
                        multi_apply_ship_status(&Net_players[player_num], &bi, 0);         
                } 
                // else ignore it as a repeat from the same guy
        } else {                                                         // CLIENT SIDE
                // this is the return from the server, so we should now apply them locally
      // if(lookup_ship_status(Net_player,unique_id,1)){
                multi_apply_ship_status(Net_player, &bi, 1);
                // }
        }       
}

// MWA 4/28/9 -- redid this function since message all fighers was really broken
// for clients.  Left all details to this function instead of higher level messaging
// code
void send_player_order_packet(int type, int index, int cmd)
{
        ubyte data[MAX_PACKET_SIZE];
        ubyte val;
        ushort target_signature;
        char t_subsys;
        int packet_size = 0;

        BUILD_HEADER(PLAYER_ORDER_PACKET);

        val = (ubyte)type;
        ADD_DATA(val);         // ship order or wing order, or message all fighters

        // if we are not messaging all ships or wings, add the index, which is the shipnum or wingnum
        if ( val != SQUAD_MSG_ALL ){
                ADD_INT(index);  // net signature of target ship
        }

        ADD_INT(cmd);         // the command itself

        // add target data.
        target_signature = 0;
        if ( Player_ai->target_objnum != -1 ){
                target_signature = Objects[Player_ai->target_objnum].net_signature;
        }

        ADD_USHORT( target_signature );

        t_subsys = -1;
        if ( (Player_ai->target_objnum != -1) && (Player_ai->targeted_subsys != NULL) ) {
                int s_index;

                s_index = ship_get_index_from_subsys( Player_ai->targeted_subsys, Player_ai->target_objnum );
                SDL_assert( s_index < CHAR_MAX );                       // better be less than this!!!!
                t_subsys = (char)s_index;
        }
        ADD_DATA(t_subsys);
   
        multi_io_send_reliable(Net_player, data, packet_size);
}

// brief explanation :
// in either case (wing or ship command), we need to send in a pseudo-ai object. Basically, both command handler
// functions "normally" (non multiplayer) use a couple of the Player_ai fields. So, we just fill in the ones necessary
// (which we can reconstruct from the packet data), and pass this as the default variable ai_info *local
// Its kind of a hack, but it eliminates the need to go in and screw around with quite a bit of code
void process_player_order_packet(ubyte *data, header *hinfo)
{
        int offset, player_num, command, index = 0, tobjnum_save;       
        ushort target_signature;
        char t_subsys, type;
        object *objp, *target_objp;
        ai_info *aip;
        ship *shipp;
        ship_subsys *tsubsys_save, *targeted_subsys;

        SDL_assert(MULTIPLAYER_MASTER);

        // packet values - its easier to read all of these in first
                
        offset = HEADER_LENGTH;
        
        GET_DATA( type );
        if ( type != SQUAD_MSG_ALL ){
                GET_INT( index );
        }

        GET_INT( command );
        GET_USHORT( target_signature );
        GET_DATA( t_subsys );

        PACKET_SET_SIZE();      

        player_num = find_player_id(hinfo->id);
        if(player_num == -1){
                nprintf(("Network","Received player order packet from unknown player\n"));              
                return;
        }       

        objp = &Objects[Net_players[player_num].player->objnum];
        if ( objp->type != OBJ_SHIP ) {
                nprintf(("Network", "not doing player order because object requestting is not a ship\n"));
                return;
        }

        // HACK HACK HACK HACK HACK HACK
        // if the player has sent a rearm-repair me message, we should bail here after evaluating it, since most likely the rest of
        // the data is BOGUS.  All people should be able to to these things as well.
        if(command == REARM_REPAIR_ME_ITEM){ 
                hud_squadmsg_repair_rearm(0,&Objects[Net_players[player_num].player->objnum]);          
                return;
        } else if(command == ABORT_REARM_REPAIR_ITEM){
                hud_squadmsg_repair_rearm_abort(0,&Objects[Net_players[player_num].player->objnum]);            
                return;
        }

        // if this player is not allowed to do messaging, quit here
        if( !multi_can_message(&Net_players[player_num]) ){
                nprintf(("Network","Recieved player order packet from player not allowed to give orders!!\n"));
                return;
        }

        // check to see if the type of order is a reinforcement call.  If so, intercept it, and
        // then call them in.
        if ( type == SQUAD_MSG_REINFORCEMENT ) {
                SDL_assert( (index >= 0) && (index < Num_reinforcements) );
                hud_squadmsg_call_reinforcement(index, player_num);
                return;
        }

        // set the player's ai information here
        shipp = &Ships[objp->instance];
        aip = &Ai_info[shipp->ai_index];

        // get the target objnum and targeted subsystem.  Quick out if we don't have an object to act on.
        target_objp = multi_get_network_object( target_signature );
        if ( target_objp == NULL ) {
                return;
        }

        targeted_subsys = NULL;
        if ( t_subsys != -1 ) {
                SDL_assert( target_objp != NULL );
                targeted_subsys = ship_get_indexed_subsys( &Ships[target_objp->instance], t_subsys);
        }

        // save and restore the target objnum and targeted subsystem so that we don't mess up other things
        // here
        tobjnum_save = aip->target_objnum;
        tsubsys_save = aip->targeted_subsys;

        if ( target_objp ) {
                aip->target_objnum = OBJ_INDEX(target_objp);
        } else {
                aip->target_objnum = -1;
        }

        aip->targeted_subsys = targeted_subsys;

        if ( type == SQUAD_MSG_SHIP ) {
                hud_squadmsg_send_ship_command(index, command, 1, player_num);
        } else if ( type == SQUAD_MSG_WING ) {
                hud_squadmsg_send_wing_command(index, command, 1, player_num);
        } else if ( type == SQUAD_MSG_ALL ) {
                hud_squadmsg_send_to_all_fighters( command, player_num );
        }

        SDL_assert(tobjnum_save != Ships[aip->shipnum].objnum); //      make sure not targeting self
        aip->target_objnum = tobjnum_save;
        aip->targeted_subsys = tsubsys_save;
}

// FILE SIGNATURE stuff :
// there are 2 cases for file signature sending which are handled very differently
// 1.) Pregame. In this case, the host requires that all clients send a filesig packet (when process_file_sig() is called, it
//     posts an ACK_FILE_ACCEPTED packet to ack_evaluate, so he thinks they have acked). 
// 2.) Ingame join. In this case, the client sends his filesig packet automatically to the server and the _client_ waits for
//     the ack, before continuing to join. It would be way too messy to have the server wait on the clients ack, since he
//     would have to keep track of up to potentially 14 other ack handles  (ouch).
void send_file_sig_packet(ushort sum_sig,int length_sig)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        BUILD_HEADER(FILE_SIG_INFO);
        ADD_USHORT(sum_sig);
        ADD_INT(length_sig);
                
        multi_io_send_reliable(Net_player, data, packet_size);
}

void process_file_sig_packet(ubyte *data, header *hinfo)
{
        int offset;
        int length_sig;
        ushort sum_sig; 
        offset = HEADER_LENGTH;

        // should only be received on the server-side
        SDL_assert(Net_player->flags & NETINFO_FLAG_AM_MASTER); 
        
        GET_USHORT(sum_sig);
        GET_INT(length_sig);
        PACKET_SET_SIZE();
        server_verify_filesig(hinfo->id, sum_sig, length_sig);  
}

void send_file_sig_request(char *file_name)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        BUILD_HEADER(FILE_SIG_REQUEST);
        ADD_STRING(file_name);

        SDL_assert(Net_player->flags & NETINFO_FLAG_AM_MASTER);
                
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_file_sig_request(ubyte *data, header *hinfo)
{               
        int offset = HEADER_LENGTH;     

        // get the mission name
        GET_STRING(Netgame.mission_name);        
        PACKET_SET_SIZE();      

        // set the current mission filename
        SDL_strlcpy(Game_current_mission_filename, Netgame.mission_name, SDL_arraysize(Game_current_mission_filename));

        // get the checksum
        multi_get_mission_checksum(Game_current_mission_filename);      

        if(!multi_endgame_ending()){    
                // reply to the server
                send_file_sig_packet(Multi_current_file_checksum,Multi_current_file_length);
        }
}

// functions to deal with subsystems getting whacked
void send_subsystem_destroyed_packet( ship *shipp, int index, vector world_hitpos )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;
        ubyte uindex;
        vector tmp, local_hitpos;
        object *objp;

        SDL_assert ( index < UCHAR_MAX );
        uindex = (ubyte)(index);

        objp = &Objects[shipp->objnum];

        vm_vec_sub(&tmp, &world_hitpos, &objp->pos );
        vm_vec_rotate( &local_hitpos, &tmp, &objp->orient );

        BUILD_HEADER(SUBSYSTEM_DESTROYED);
        ADD_USHORT( Objects[shipp->objnum].net_signature );
        ADD_DATA( uindex );
//      ADD_DATA( local_hitpos );
        add_vector_data(data, &packet_size, local_hitpos);
        
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_subsystem_destroyed_packet( ubyte *data, header *hinfo )
{
        int offset;
        ushort signature;
        ubyte uindex;
        object *objp;
        vector local_hit_pos = ZERO_VECTOR, world_hit_pos;

        offset = HEADER_LENGTH;

        GET_USHORT( signature );
        GET_DATA( uindex );
//      GET_DATA( local_hit_pos );
        get_vector_data(data, &offset, local_hit_pos);

        // get the network object.  process it if we find it.
        objp = multi_get_network_object( signature );
        if ( objp != NULL ) {
                ship *shipp;
                ship_subsys *subsysp;

                // be sure we have a ship!!!
                // SDL_assert ( objp->type == OBJ_SHIP );
                if(objp->type != OBJ_SHIP){
                        PACKET_SET_SIZE();
                        return;
                }

                shipp = &Ships[objp->instance];

                // call to get the pointer to the subsystem we should be working on
                subsysp = ship_get_indexed_subsys( shipp, (int)uindex );
                vm_vec_unrotate( &world_hit_pos, &local_hit_pos, &objp->orient );
                vm_vec_add2( &world_hit_pos, &objp->pos );

                do_subobj_destroyed_stuff( shipp, subsysp, &world_hit_pos );
                if ( objp == Player_obj ) {
                        hud_gauge_popup_start(HUD_DAMAGE_GAUGE, 5000);
                }
        }

        PACKET_SET_SIZE();
}


// packet to tell clients cargo of a ship was revealed to all
void send_subsystem_cargo_revealed_packet( ship *shipp, int index )
{
        ubyte data[MAX_PACKET_SIZE], uindex;
        int packet_size;

        SDL_assert ( index < UCHAR_MAX );
        uindex = (ubyte)(index);

        // build the header and add the data
        BUILD_HEADER(SUBSYS_CARGO_REVEALED);
        ADD_USHORT( Objects[shipp->objnum].net_signature );
        ADD_DATA( uindex );

        // server sends to all players
        if(MULTIPLAYER_MASTER){         
                multi_io_send_to_all_reliable(data, packet_size);
        } 
        // clients just send to the server
        else {
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

// process a subsystem cargo revealed packet
void process_subsystem_cargo_revealed_packet( ubyte *data, header *hinfo )
{
        int offset;
        ushort signature;
        ubyte uindex;
        object *objp;
        ship *shipp;
        ship_subsys *subsysp;

        offset = HEADER_LENGTH;
        GET_USHORT( signature );
        GET_DATA( uindex );
        PACKET_SET_SIZE();

        // get a ship pointer and call the ship function to reveal the cargo
        objp = multi_get_network_object( signature );
        if ( objp == NULL ) {
                nprintf(("Network", "Could not find object with net signature %d for cargo revealed\n", signature ));
                return;
        }

        // SDL_assert( objp->type == OBJ_SHIP );
        if((objp->type != OBJ_SHIP) || (objp->instance < 0) || (objp->instance >= MAX_SHIPS)){
                return;
        }

        shipp = &Ships[objp->instance];

        // call to get the pointer to the subsystem we should be working on
        subsysp = ship_get_indexed_subsys( shipp, (int)uindex );
        if (subsysp == NULL) {
                nprintf(("Network", "Could not find subsys for ship %s for cargo revealed\n", Ships[objp->instance].ship_name ));
                return;
        }

        // this will take care of re-routing to all other clients
        void ship_do_cap_subsys_cargo_revealed( ship *shipp, ship_subsys *subsys, int from_network );
        ship_do_cap_subsys_cargo_revealed( shipp, subsysp, 1 );

        // server should rebroadcast
        if(MULTIPLAYER_MASTER){
                send_subsystem_cargo_revealed_packet(&Ships[objp->instance], (int)uindex);
        }
}

void send_netplayer_load_packet(net_player *pl)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        BUILD_HEADER(LOAD_MISSION_NOW);
        ADD_STRING(Netgame.mission_name);

        if(pl == NULL){         
                multi_io_send_to_all_reliable(data, packet_size);
        } else {
                multi_io_send_reliable(pl, data, packet_size);
        }
}

void process_netplayer_load_packet(ubyte *data, header *hinfo)
{
        char str[100];
        int offset = HEADER_LENGTH;     

        GET_STRING(str);
        PACKET_SET_SIZE();

        SDL_strlcpy(Netgame.mission_name, str, SDL_arraysize(Netgame.mission_name));
        SDL_strlcpy(Game_current_mission_filename, str, SDL_arraysize(Game_current_mission_filename));
        if(!Multi_mission_loaded){

                // MWA 2/3/98 -- ingame join changes!!!
                // everyone can go through the same mission loading path here!!!!
                nprintf(("Network","Loading mission..."));

                // notify everyone that I'm loading the mission
                Net_player->state = NETPLAYER_STATE_MISSION_LOADING;
                send_netplayer_update_packet();         

                // do the load itself
                game_start_mission();           

                // ingame joiners need to "untag" all player ships as could_be_players.  The ingame joining
                // code will remark the correct player ships
                if ( Net_player->flags & NETINFO_FLAG_INGAME_JOIN ) {
                        multi_untag_player_ships();
                }

                Net_player->flags |= NETINFO_FLAG_MISSION_OK;           
                Net_player->state = NETPLAYER_STATE_MISSION_LOADED;
                send_netplayer_update_packet();

                Multi_mission_loaded = 1;
                nprintf(("Network","Finished loading mission\n"));              
        }       
}

void send_jump_into_mission_packet(net_player *pl)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        SDL_assert(Net_player->flags & NETINFO_FLAG_AM_MASTER);

        BUILD_HEADER(JUMP_INTO_GAME);

        // ingame joiners will get special data.  We need to tell them about the state of the mission, like paused,
        // and possible other things.
        if ( pl != NULL ) {
                if ( pl->flags & NETINFO_FLAG_INGAME_JOIN ) {
                        ADD_INT(Netgame.game_state);
                }
        }
        
        // broadcast
        if(pl == NULL){         
                multi_io_send_to_all_reliable(data, packet_size);
        }
        // send to a specific player
        else {
                multi_io_send_reliable(pl, data, packet_size);
        }
}

void process_jump_into_mission_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        int state;      
        
        state = 0;      

        // if I am ingame joining, there should be extra data.  For now, this data is the netgame state.
        // the game could be paused, so ingame joiner needs to deal with it.
        if ( Net_player->flags & NETINFO_FLAG_INGAME_JOIN ) {
                GET_INT( state );
                Netgame.game_state = state;
        }

        PACKET_SET_SIZE();      

        // handle any special processing for being in a weird substate
        multi_handle_state_special();

        // if I'm an ingame joiner, go to the ship select screen, or if I'm an observer, jump right in!
        if(Net_player->flags & NETINFO_FLAG_INGAME_JOIN){
                if(Net_player->flags & NETINFO_FLAG_OBSERVER){                                          
                        multi_ingame_observer_finish();                 
                } else {
                        gameseq_post_event(GS_EVENT_INGAME_PRE_JOIN);
                        Net_player->state = NETPLAYER_STATE_INGAME_SHIP_SELECT;
                        send_netplayer_update_packet();
                }
        } else {
                // start the mission!!
                if(!(Game_mode & GM_IN_MISSION) && !(Game_mode & GM_STANDALONE_SERVER)){
                        Netgame.game_state = NETGAME_STATE_IN_MISSION;
                        gameseq_post_event(GS_EVENT_ENTER_GAME);
                        Net_player->state = NETPLAYER_STATE_IN_MISSION;
                        send_netplayer_update_packet();
                }               
        }

        extern time_t Player_multi_died_check;
        Player_multi_died_check = -1;

        // recalc all object pairs now  
        extern void obj_reset_all_collisions();
        obj_reset_all_collisions();

        // display some cool text
        multi_common_add_text(XSTR("Received mission start\n",720),1);

        // NETLOG
        ml_string(NOX("Client received mission start from server - entering mission"));
}

//XSTR:OFF

const char *repair_text[] = {
        "unknown",
        "REPAIR_INFO_BEGIN",
        "REPAIR_INFO_END",
        "REPAIR_INFO_UPDATE",
        "REPAIR_INFO_QUEUE",
        "REPAIR_INFO_ABORT",
        "REPAIR_INFO_BROKEN",
        "REPAIR_INFO_WARP_ADD",
        "REPAIR_INFO_WARP_REMOVE",
        "REPAIR_INFO_ONWAY",
        "REPAIR_INFO_KILLED",
        "REPAIR_INFO_COMPLETE",
};

//XSTR:ON

// the following two routines deal with updating and sending information regarding players
// rearming and repairing during the game.  The process function calls the routines to deal with
// setting flags and other interesting things.
void send_repair_info_packet(object *repaired_objp, object *repair_objp, int code )
{
        int packet_size = 0;
        ushort repaired_signature, repair_signature;
        ubyte data[MAX_PACKET_SIZE];
        ubyte cd;

        // use the network signature of the destination object if there is one, -1 otherwise.
        // client will piece it all together
        repaired_signature = repaired_objp->net_signature;

        // the repair ship may be NULL here since it might have been destroyed
        repair_signature = 0;
        if ( repair_objp ){
                repair_signature = repair_objp->net_signature;
        }

        BUILD_HEADER(CLIENT_REPAIR_INFO);
        cd = (ubyte)code;
        ADD_DATA(cd);
        ADD_USHORT( repaired_signature );
        ADD_USHORT( repair_signature );
        
        multi_io_send_to_all_reliable(data, packet_size);

        nprintf(("Network", "Repair: %s sent to all players (%s/%s)\n", repair_text[cd], Ships[repaired_objp->instance].ship_name, (repair_objp==NULL)?"<none>":Ships[repair_objp->instance].ship_name));
}

void process_repair_info_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        ushort repaired_signature, repair_signature;
        object *repaired_objp, *repair_objp;
        ubyte code;

        GET_DATA(code);
        GET_USHORT( repaired_signature );
        GET_USHORT( repair_signature );
        PACKET_SET_SIZE();

        repaired_objp = multi_get_network_object( repaired_signature );
        repair_objp = multi_get_network_object( repair_signature );

        nprintf(("Network", "Repair: %s received (%s/%s)\n", repair_text[code], (repaired_objp==NULL)?"<None>":Ships[repaired_objp->instance].ship_name, (repair_objp==NULL)?"<None>":Ships[repair_objp->instance].ship_name));

        if ( Net_player->flags & NETINFO_FLAG_WARPING_OUT ){
                return;
        }

        if ( repaired_objp == NULL ) {
                Int3();                         // Sandeep says this is bad bad bad.  No ship to repair.
                return;
        }

        // the hope is to simply call the routine in the ai code to set/unset flags
        // based on the code value and everything else should happen..I hope....
        if ( (code != REPAIR_INFO_WARP_ADD) && (code != REPAIR_INFO_WARP_REMOVE ) ) {

                ai_do_objects_repairing_stuff( repaired_objp, repair_objp, (int)code );

                // set the dock flags when repair begins.  Prevents problem in lagging docking
                // packet.  Also set any other flags/modes which need to be set to prevent Asserts.
                // bleah.
                if ( (code == REPAIR_INFO_BEGIN) && (repair_objp != NULL) ) {
                        ai_do_objects_docked_stuff( repaired_objp, repair_objp );
                        Ai_info[Ships[repair_objp->instance].ai_index].mode = AIM_DOCK;
                }

                // if the repair is done (either by abort, or ending), mark the repair ship's goal
                // as being done.
                if ( ((code == REPAIR_INFO_ABORT) || (code == REPAIR_INFO_END)) && repair_objp ){
                        ai_mission_goal_complete( &Ai_info[Ships[repair_objp->instance].ai_index] );
                }
        } else {
                if ( code == REPAIR_INFO_WARP_ADD ){
                        mission_warp_in_support_ship( repaired_objp );
                } else {
                        mission_remove_scheduled_repair( repaired_objp );
                }
        }
}

// sends information updating clients on certain AI information that clients will
// need to know about to keep HUD information up to date.  objp is the object that we
// are updating, and what is the type of stuff that we are updating.
void send_ai_info_update_packet( object *objp, char what )
{
        int packet_size;
        ushort other_signature;
        ubyte data[MAX_PACKET_SIZE];
        ai_info *aip;
        ubyte dock_index, dockee_index;

        // SDL_assert( objp->type == OBJ_SHIP );
        if(objp->type != OBJ_SHIP){
                return;
        }
        aip = &Ai_info[Ships[objp->instance].ai_index];

        // do an out here
        if ( Ships[objp->instance].flags & (SF_DEPARTING | SF_DYING) )
                return;

        BUILD_HEADER( AI_INFO_UPDATE );
        ADD_USHORT( objp->net_signature );
        ADD_DATA( what );

        // depending on the "what" value, we will send different information
        // to the clients
        switch( what ) {

        case AI_UPDATE_DOCK:
                // for docking ships, add the signature of the ship that we are docking with.
                SDL_assert( aip->dock_objnum != -1 );
                other_signature = Objects[aip->dock_objnum].net_signature;
                dock_index = (ubyte)(aip->dock_index);
                dockee_index = (ubyte)(aip->dockee_index);
                ADD_USHORT( other_signature );
                ADD_DATA(dock_index);
                ADD_DATA(dockee_index);
                break;

        case AI_UPDATE_UNDOCK:
                // for undocking ships, check the dock_objnum since we might or might not have it
                // depending on whether or not a ship was destroyed while we were docked.
                other_signature = 0;
                if ( aip->dock_objnum != -1 )
                        other_signature = Objects[aip->dock_objnum].net_signature;
                ADD_USHORT( other_signature );

                break;

        case AI_UPDATE_ORDERS: {
                int shipnum;

                // for orders, we only need to send a little bit of information here.  Be sure that the
                // first order for this ship is active
                SDL_assert( (aip->active_goal != AI_GOAL_NONE) && (aip->active_goal != AI_ACTIVE_GOAL_DYNAMIC) );
                ADD_INT( aip->goals[0].ai_mode );
                ADD_INT( aip->goals[0].ai_submode );
                shipnum = -1;
                if ( aip->goals[0].ship_name != NULL )
                        shipnum = ship_name_lookup( aip->goals[0].ship_name );

                // the ship_name member of the goals structure may or may not contain a real shipname.  If we don't
                // have a valid shipnum, then don't sweat it since it may not really be a ship.
                if ( shipnum != -1 ) {
                        SDL_assert( Ships[shipnum].objnum != -1 );
                        other_signature = Objects[Ships[shipnum].objnum].net_signature;
                } else
                        other_signature = 0;
                
                ADD_USHORT( other_signature );

                // for docking, add the dock and dockee index
                if ( aip->goals[0].ai_mode & (AI_GOAL_DOCK|AI_GOAL_REARM_REPAIR) ) {
                        SDL_assert( (aip->goals[0].docker.index >= 0) && (aip->goals[0].docker.index < UCHAR_MAX) );
                        SDL_assert( (aip->goals[0].dockee.index >= 0) && (aip->goals[0].dockee.index < UCHAR_MAX) );
                        dock_index = (ubyte)aip->goals[0].docker.index;
                        dockee_index = (ubyte)aip->goals[0].dockee.index;
                        ADD_DATA( dock_index );
                        ADD_DATA( dockee_index );
                }
                break;
                }

        default:
                Int3();
        }
        
        multi_rate_add(1, "aiu", packet_size);
        multi_io_send_to_all_reliable(data, packet_size);
}

// process an ai_info update packet.  Docking/undocking, ai orders, etc. are taken care of here.  This
// information is mainly used to keep the clients HUD up to date with the appropriate information.
void process_ai_info_update_packet( ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        int mode, submode;
        ushort net_signature, other_net_signature;
        object *objp, *other_objp;
        ai_info *aip;
        char code;
        ubyte dock_index = 0, dockee_index = 0;

        GET_USHORT( net_signature );            // signature of the object that we are dealing with.
        GET_DATA( code );                                       // code of what we are doing.
        objp = multi_get_network_object( net_signature );
        if ( !objp )
                nprintf(("Network", "Couldn't find object for ai update\n"));

        switch( code ) {
        case AI_UPDATE_DOCK:
                GET_USHORT( other_net_signature );
                GET_DATA( dock_index );
                GET_DATA( dockee_index );
                other_objp = multi_get_network_object( other_net_signature );
                if ( !other_objp )
                        nprintf(("Network", "Couldn't find other object for ai update on dock\n"));
                
                // if we don't have an object to work with, break out of loop
                if ( !objp || !other_objp || (objp->type != OBJ_SHIP) || (other_objp->type != OBJ_SHIP)){
                        break;
                }

                SDL_assert( other_objp->type == OBJ_SHIP );
                Ai_info[Ships[objp->instance].ai_index].dock_index = dock_index;
                Ai_info[Ships[objp->instance].ai_index].dockee_index = dockee_index;

                Ai_info[Ships[other_objp->instance].ai_index].dock_index = dockee_index;
                Ai_info[Ships[other_objp->instance].ai_index].dockee_index = dock_index;

                ai_do_objects_docked_stuff( objp, other_objp );
                break;

        case AI_UPDATE_UNDOCK:
                GET_USHORT( other_net_signature );
                other_objp = multi_get_network_object( other_net_signature );
                
                // if we don't have an object to work with, break out of loop
                if ( !objp )
                        break;

                ai_do_objects_undocked_stuff( objp, other_objp );
                break;

        case AI_UPDATE_ORDERS:
                GET_INT( mode );
                GET_INT( submode );
                GET_USHORT( other_net_signature );
                if ( mode & (AI_GOAL_DOCK|AI_GOAL_REARM_REPAIR) ) {
                        GET_DATA(dock_index);
                        GET_DATA(dockee_index);
                }

                // be sure that we have a ship object!!!
                if ( !objp || (objp->type != OBJ_SHIP) )
                        break;

                // set up the information in the first goal element of the object in question
                aip = &Ai_info[Ships[objp->instance].ai_index];
                aip->active_goal = 0;
                aip->goals[0].ai_mode = mode;
                aip->goals[0].ai_submode = submode;

                // for docking, add the dock and dockee index
                if ( mode & (AI_GOAL_DOCK|AI_GOAL_REARM_REPAIR) ) {
                        aip->dock_index = dock_index;
                        aip->dockee_index = dockee_index;
                }

                // get a shipname if we can.
                other_objp = multi_get_network_object( other_net_signature );
                if ( other_objp && (other_objp->type == OBJ_SHIP) ) {
                        // get a pointer to the shipname in question.  Use the ship_name value in the
                        // ship.  We are only using this for HUD display, so I think that using this
                        // method will be fine.
                        aip->goals[0].ship_name = Ships[other_objp->instance].ship_name;

                        // special case for destroy subsystem -- get the ai_info pointer to our target ship
                        // so that we can properly set up what subsystem this ship is attacking.
                        if ( (mode == AI_GOAL_DESTROY_SUBSYSTEM ) && (submode >= 0) )
                                aip->targeted_subsys = ship_get_indexed_subsys( &Ships[other_objp->instance], submode);

                        // if docking -- set the dock index and dockee index of this other ship
                if ( mode & (AI_GOAL_DOCK|AI_GOAL_REARM_REPAIR) ) {
                                Ai_info[Ships[other_objp->instance].ai_index].dock_index = dockee_index;
                                Ai_info[Ships[other_objp->instance].ai_index].dockee_index = dock_index;
                        }
                }

                break;

        default:
                Int3();         // this Int3() should be temporary
                nprintf(("Network", "Invalid code for ai update: %d\n", code));
                break;
        }
        PACKET_SET_SIZE();
}

// tell the standalone to move into the MISSION_SYNC_STATE
void send_mission_sync_packet(int mode,int start_campaign)
{
        ubyte data[MAX_PACKET_SIZE],is_campaign;
        int packet_size = 0;

        SDL_assert((Net_player->flags & NETINFO_FLAG_GAME_HOST) && !(Net_player->flags & NETINFO_FLAG_AM_MASTER));

        // build the header and add the sync mode (pre or post briefing)
        BUILD_HEADER(MISSION_SYNC_DATA);
        ADD_INT(mode);

        // if this is a campaign game
        if(mode == MULTI_SYNC_PRE_BRIEFING){
                if(Game_mode & GM_CAMPAIGN_MODE){
                        // add a byte indicating campaign mode
                        is_campaign = 1;
                        ADD_DATA(is_campaign);

                        // add a byte indicating if we should be starting a campaign or continuing it
                        is_campaign = (ubyte)start_campaign;
                        ADD_DATA(is_campaign);

                        // add the campaign filename
                        ADD_STRING(Netgame.campaign_name);
                }
                // otherwise if this is a single mission 
                else {
                        // add a byte indicating single mission mode
                        is_campaign = 0;
                        ADD_DATA(is_campaign);

                        // add the mission filename
                        ADD_STRING(Game_current_mission_filename);
                }
        }       
        multi_io_send_reliable(Net_player, data, packet_size);
}

// move into the MISSION_SYNC state when this is received
// this packet is sent only from a game host to a standalone
void process_mission_sync_packet(ubyte *data, header *hinfo)
{
        int mode;
        ubyte campaign_flag;
        int offset = HEADER_LENGTH;

        SDL_assert(Game_mode & GM_STANDALONE_SERVER);

        // if this is a team vs team situation, lock the players send a final team update
        if(Netgame.type_flags & NG_TYPE_TEAM){
                multi_team_host_lock_all();
                multi_team_send_update();
        }

        // get the sync mode (pre or post briefing)
        GET_INT(mode);

        if(mode == MULTI_SYNC_PRE_BRIEFING){
                // get the flag indicating if this is a single mission or a campaign mode
                GET_DATA(campaign_flag);
                if(campaign_flag){
                        // get the flag indicating whether we should be starting a new campaign
                        GET_DATA(campaign_flag);

                        // get the campaign filename
                        GET_STRING(Netgame.campaign_name);

                        // either start a new campaign or continue on to the next mission in the current campaign
                        if(campaign_flag){
                                multi_campaign_start(Netgame.campaign_name);
                        } else {
                                multi_campaign_next_mission();
                        }
                } else {
                        // make sure we remove the campaign mode flag
                        Game_mode &= ~(GM_CAMPAIGN_MODE);

                        // get the single mission filename
                        GET_STRING(Game_current_mission_filename);
                        SDL_strlcpy(Netgame.mission_name, Game_current_mission_filename, SDL_arraysize(Netgame.mission_name));
                }
        }
        PACKET_SET_SIZE();

        // set the correct mode and m ove into the state
        Multi_sync_mode = mode;
        gameseq_post_event(GS_EVENT_MULTI_MISSION_SYNC);
}

// tell a player to merge his mission stats into his alltime stats
void send_store_stats_packet(int accept)
{
        ubyte data[10],val;
        int packet_size = 0;

        BUILD_HEADER(STORE_MISSION_STATS);

        // add whether we're accepting or tossing
        val = (ubyte)accept;
        ADD_DATA(val);

        // if I'm the server, send to everyone, else send to the standalone to be rebroadcasted
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){         
                multi_io_send_to_all_reliable(data, packet_size);
        } else {
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

void process_store_stats_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        ubyte accept;

        GET_DATA(accept);
        PACKET_SET_SIZE();

        // if I'm the standalone, rebroadcast. Otherwise, if I'm a client, merge my mission stats with my alltime stats
        if(Game_mode & GM_STANDALONE_SERVER){
                // rebroadcast the packet to all others in the game
                nprintf(("Network","Standalone received store stats packet - rebroadcasting..\n"));                             
                multi_io_send_to_all_reliable(data, offset);
        } else {                        
                if(accept){
                        // all players should mark the stats as being accepted in the debriefing
                        multi_debrief_stats_accept();                   
                } else {
                        // all players should mark the stats as being "tossed" in the debriefing
                        multi_debrief_stats_toss();                     
                }                       
        }
}

void send_debris_update_packet(object *objp,int code)
{
        ubyte data[MAX_PACKET_SIZE];
        ubyte val;
        int packet_size = 0;

        BUILD_HEADER(DEBRIS_UPDATE);    
        ADD_USHORT(objp->net_signature);
        val = (ubyte) code;
        ADD_DATA(val);
        
        // add any extra relevant data
        switch(code){
        case DEBRIS_UPDATE_UPDATE:
        //      ADD_DATA(objp->pos);                                            // add position
                add_vector_data(data, &packet_size, objp->pos);
                ADD_ORIENT(objp->orient);                               // add orientation
        //      ADD_DATA(objp->phys_info.vel);          // add velocity
                add_vector_data(data, &packet_size, objp->phys_info.vel);
        //      ADD_DATA(objp->phys_info.rotvel);       // add rotational velocity
                add_vector_data(data, &packet_size, objp->phys_info.rotvel);
                break;
        }       
        multi_io_send_to_all(data, packet_size);
}

void process_debris_update_packet(ubyte *data, header *hinfo)
{
        ushort net_sig;
        ubyte code;
        object bogus_object;
        object *objp;
        int offset = HEADER_LENGTH;
        
        GET_USHORT(net_sig);
        GET_DATA(code);

        objp = NULL;
        objp = multi_get_network_object(net_sig);
        if(objp == NULL){
                objp = &bogus_object;
        }

        switch((int)code){
        // update the object
        case DEBRIS_UPDATE_UPDATE:
                //GET_DATA(objp->pos);
        get_vector_data( data, &offset, objp->pos );
                
                GET_ORIENT(objp->orient);
                GET_DATA(objp->phys_info.vel);
                GET_DATA(objp->phys_info.rotvel);
                break;
        // simply remove it (no explosion)
        case DEBRIS_UPDATE_REMOVE:
                if(objp != &bogus_object){
                        SDL_assert(objp->type == OBJ_DEBRIS);
                        obj_delete(OBJ_INDEX(objp));
                }
                break;
        // blow it up
        case DEBRIS_UPDATE_NUKE:
                if(objp != &bogus_object)
                        debris_hit(objp,NULL,&objp->pos,1000000.0f);
                break;
        }

        PACKET_SET_SIZE();
}

// ALAN begin
void send_wss_request_packet(short player_id, int from_slot, int from_index, int to_slot, int to_index, int wl_ship_slot, int ship_class, int mode, net_player *p)
{
        ubyte data[MAX_PACKET_SIZE];

        int packet_size = 0;

        BUILD_HEADER(WSS_REQUEST_PACKET);
        
        // add the request information
        ADD_SHORT(player_id);
        ADD_INT(from_slot);
        ADD_INT(from_index);
        ADD_INT(to_slot);
        ADD_INT(to_index);
        ADD_INT(wl_ship_slot);  // only used in weapons loadout
        ADD_INT(ship_class);
        ADD_INT(mode);

        // a standard request
        if(p == NULL){          
                multi_io_send_reliable(Net_player, data, packet_size);
        } 
        // being routed through the standalone to the host of the game
        else {
                SDL_assert(Game_mode & GM_STANDALONE_SERVER);                   
                multi_io_send_reliable(p, data, packet_size);
        }
}

void process_wss_request_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        int from_slot,from_index;
        int to_slot,to_index;
        int mode;
        int wl_ship_slot,ship_class;
        short player_id;        
        int player_num;

        // determine who this request is from   
        GET_SHORT(player_id);   
        player_num = find_player_id(player_id); 

        // read in the request data     
        GET_INT(from_slot);
        GET_INT(from_index);
        GET_INT(to_slot);
        GET_INT(to_index);
        GET_INT(wl_ship_slot); // only used in weapons loadout
        GET_INT(ship_class);    // only used in multi team select
        GET_INT(mode);
        PACKET_SET_SIZE();

        SDL_assert(player_num != -1);   
        if(player_num == -1){
                return;
        }

        // if we're the standalone, we have to route this packet to the host of the game
        if(Game_mode & GM_STANDALONE_SERVER){
                send_wss_request_packet(player_id, from_slot, from_index, to_slot, to_index, wl_ship_slot, ship_class, mode, Netgame.host);
        } 
        // otherwise we're the host and should process the request
        else {
                switch(mode){
                case WSS_WEAPON_SELECT :
                        wl_drop(from_slot,from_index,to_slot,to_index,wl_ship_slot,player_num);
                        break;
                case WSS_SHIP_SELECT :
                        multi_ts_drop(from_slot,from_index,to_slot,to_index,ship_class,player_num);                     
                        break;
                default:
                        Int3();
                }
        }
}

void send_wss_update_packet(int team_num,ubyte *wss_data,int size)
{
        ubyte data[MAX_PACKET_SIZE],team;
        int packet_size = 0;

        SDL_assert(size <= (MAX_PACKET_SIZE - 10));

        BUILD_HEADER(WSS_UPDATE_PACKET);

        // add the team/pool # this is for
        team = (ubyte)team_num;
        ADD_DATA(team);

        // add the data block size
        ADD_INT(size);
        
        // add the data itself
        memcpy(data + packet_size,wss_data,size);
        packet_size += size;

        // if we're also the master of the game (not on a standalone)
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){         
                multi_io_send_to_all_reliable(data, packet_size);
        }
        // if we're only the host on the standalone, then send the packet to the standalone to be routed
        else {
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

void process_wss_update_packet(ubyte *data, header *hinfo)
{               
        ubyte team;
        int size,player_index,idx;
        int offset = HEADER_LENGTH;

        // get the team/pool #
        GET_DATA(team);

        // get the data size
        GET_INT(size);          

        // if we're the standalone, then we should be routing this data to all the other clients
        if(Game_mode & GM_STANDALONE_SERVER){
                // read in the data             
                offset += size;         
                PACKET_SET_SIZE();

                // determine where this came from               
                player_index = find_player_id(hinfo->id);               
                SDL_assert(player_index != -1);         
                if(player_index < 0){
                        return;
                }

                // route the packet (don't resend it to the host)
                for(idx=0;idx<MAX_PLAYERS;idx++){
                        if(MULTI_CONNECTED(Net_players[idx]) && (&Net_players[idx] != Net_player) && (&Net_players[idx] != &Net_players[player_index]) ){                               
                                multi_io_send_reliable(&Net_players[idx], data, offset);
                        }
                }                       
        } else {
                // set the proper pool pointers
                ss_set_team_pointers((int)team);

                // read in the block of data, and apply it to the weapons/ship pools
                offset += restore_wss_data(data + offset);
                PACKET_SET_SIZE();

                // set the pool pointers back to my own team
                ss_set_team_pointers(Net_player->p_info.team);

                // sync the interface if this was for my own team
                if((int)team == Net_player->p_info.team){
                        multi_ts_sync_interface();
                }               
        }
}
// ALAN END


// function to send firing information from the client to the server once they reach
// the final sync screen.
void send_firing_info_packet()
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;
        ubyte plinked, sdual;

        SDL_assert( !(Net_player->flags & NETINFO_FLAG_AM_MASTER) );

        BUILD_HEADER(FIRING_INFO);
        plinked = (ubyte)((Player_ship->flags & SF_PRIMARY_LINKED)?1:0);
        sdual = (ubyte)((Player_ship->flags & SF_SECONDARY_DUAL_FIRE)?1:0);
        ADD_DATA( plinked );
        ADD_DATA( sdual );
        
        multi_io_send_reliable(Net_player, data, packet_size);
}

void process_firing_info_packet( ubyte *data, header *hinfo )
{
        int offset, player_num; 
        ubyte plinked, sdual;
        ship *shipp;

        // only the master of the game should be dealing with these packets
        SDL_assert( Net_player->flags & NETINFO_FLAG_AM_MASTER );

        offset = HEADER_LENGTH;
        GET_DATA( plinked );
        GET_DATA( sdual );
        PACKET_SET_SIZE();      

        player_num = find_player_id(hinfo->id);
        if(player_num < 0){
                nprintf(("Network","Received firing info packet from unknown player, ignoring\n"));
                return;
        }

        // get the ship pointer for this player and set the flags accordingly.
        shipp = &(Ships[Objects[Net_players[player_num].player->objnum].instance]);
        if ( plinked )
                shipp->flags |= SF_PRIMARY_LINKED;
        else
                shipp->flags &= ~SF_PRIMARY_LINKED;

        if ( sdual )
                shipp->flags |= SF_SECONDARY_DUAL_FIRE;
        else
                shipp->flags &= ~SF_SECONDARY_DUAL_FIRE;
}

// packet to deal with changing status of mission goals.  used to be sent every so often from server
// to clients, but with addition of reliable sockets, send when complete, invalid, etc.
// goal_num is the index into mission_goals.  new_status means failed, success, etc.  -1 if not used.
// valid means goal is changing to invalid(0) or valid(1).  only applies if new_status == -1
void send_mission_goal_info_packet( int goal_num, int new_status, int valid )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;

        BUILD_HEADER(MISSION_GOAL_INFO);

        ADD_INT(goal_num);
        ADD_INT(new_status);
        ADD_INT(valid);
        
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_mission_goal_info_packet( ubyte *data, header *hinfo )
{
        int offset, goal_num, new_status, valid;

        offset = HEADER_LENGTH;
        GET_INT(goal_num);
        GET_INT(new_status);
        GET_INT(valid);
        PACKET_SET_SIZE();

        // if new_status != -1, then this is a change in goal status (i.e. goal failed, or is successful)
        if ( new_status != -1 ){
                mission_goal_status_change( goal_num, new_status );
        } else {
                mission_goal_validation_change( goal_num, valid );
        }
}

void send_player_settings_packet(net_player *p)
{
        ubyte data[MAX_PACKET_SIZE];
        ubyte stop;
        int idx;
        int packet_size = 0;

        // build the header
        BUILD_HEADER(PLAYER_SETTINGS);

        // add all the data for all the players
        stop = 0x0;
        for(idx=0;idx<MAX_PLAYERS;idx++){
                if(MULTI_CONNECTED(Net_players[idx])){
                        ADD_DATA(stop);
                        ADD_SHORT(Net_players[idx].player_id);

                        // break the p_info structure by member, so we don't overwrite any absolute pointers
                        // ADD_DATA(Net_players[idx].p_info);
                        ADD_INT(Net_players[idx].p_info.team);
                        ADD_INT(Net_players[idx].p_info.ship_index);
                        ADD_INT(Net_players[idx].p_info.ship_class);
                }
        }
        // add the stop byte
        stop = 0xff;
        ADD_DATA(stop);

        // either broadcast the data or send to a specific player
        if(p == NULL){          
                multi_io_send_to_all_reliable(data, packet_size);
        } else {
                multi_io_send_reliable(p, data, packet_size);
        }                       
}

void process_player_settings_packet(ubyte *data, header *hinfo)
{
        int offset,player_num;
        net_player_info bogus,*ptr;
        short player_id;
        ubyte stop;

        offset = HEADER_LENGTH;

        // read in the data for all the players
        GET_DATA(stop);
        while(stop != 0xff){
                // lookup the player
                GET_SHORT(player_id);
                player_num = find_player_id(player_id);

                // make sure this is a valid player
                if(player_num == -1){
                        ptr = &bogus;                   
                } else {
                        ptr = &Net_players[player_num].p_info;
                }
                
                GET_INT(ptr->team);
                GET_INT(ptr->ship_index);
                GET_INT(ptr->ship_class);
                
                // next stop byte
                GET_DATA(stop);
        }
        PACKET_SET_SIZE();

        // update the server with my new state
        // MWA -- 3/31/98 -- check for in mission instead of state.
        //if ( Netgame.game_state == NETGAME_STATE_MISSION_SYNC) {
        if( !(Game_mode & GM_IN_MISSION) ) {
                Net_player->state = NETPLAYER_STATE_SETTINGS_ACK;
                send_netplayer_update_packet(); 
        }


        // display some cool text
        multi_common_add_text(XSTR("Received player settings packet\n",721),1); 
}

void send_deny_packet(net_addr *addr, int code)
{
        ubyte data[10];
        int packet_size = 0;

        // build the header and add the rejection code
        BUILD_HEADER(DENY);

        ADD_INT(code);
        
        // send the packet      
        psnet_send(addr, data, packet_size);
}

void process_deny_packet(ubyte *data, header *hinfo)
{
        int offset,code;

        // get the denial code
        offset = HEADER_LENGTH;
        GET_INT(code);
        PACKET_SET_SIZE();

        // if there is already a dialog active, do nothing - who cares at this point.
        if(popup_active()){
                return;
        }

        // display the appropriate dialog
        switch(code){
        case JOIN_DENY_JR_STATE :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because the game is not in an appropriate state to accept",722));
                break;
        case JOIN_DENY_JR_TRACKER_INVAL :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because this is a Parallax Online game and you are not a registered Parallax Online pilot",723));
                break;
        case JOIN_DENY_JR_PASSWD :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because this is a password protected game",724));
                break;  
        case JOIN_DENY_JR_CLOSED :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because this is a closed game and the mission is in progress",725));
                break;
        case JOIN_DENY_JR_TEMP_CLOSED :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because the netgame is forming and the host has temporarily closed it",726));
                break;
        case JOIN_DENY_JR_RANK_HIGH :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because this is a rank limited game and your rank is too high",727));
                break;
        case JOIN_DENY_JR_RANK_LOW :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because this is a rank limited game and your rank is too low",728));
                break;
        case JOIN_DENY_JR_DUP :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because there is an identical player already in the game",729));
                break;
        case JOIN_DENY_JR_FULL :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because the game is full",730));
                break;
        case JOIN_DENY_JR_BANNED :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because you are banned from this server",731));
                break;
        case JOIN_DENY_JR_NOOBS :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You have been rejected because this game does not allow observers",732));
                break;
        case JOIN_DENY_JR_INGAME_JOIN :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You cannot join at this time since someone else is currently joining.  Try again shortly.",733));
                break;
        case JOIN_DENY_JR_BAD_VERSION :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You cannot join this game because you are running an older version of FreeSpace than the server.  Exit FreeSpace, and choose the 'Update FreeSpace' button in the FreeSpace launcher to download the latest version of FreeSpace.",734));
                break;  
        case JOIN_DENY_JR_TYPE :
                popup(PF_USE_AFFIRMATIVE_ICON,1,POPUP_OK,XSTR("You cannot join a game in progress unless it is a dogfight mission.",1433));
                break;                  
        }       

        // call this so that the join request timestamp automatically expires when we hear back from the server
        multi_join_reset_join_stamp();
}

// this packet will consist of 
// 1.) netplayer ship classes                   (85 bytes max)
// 2.) ship weapon state data                   (241 bytes max)
// 3.) player settings et. al.          (133 bytes max)
// TOTAL                            459                         NOTE : keep this in mind when/if adding new data to this packet
void send_post_sync_data_packet(net_player *p, int std_request)
{
        ubyte data[MAX_PACKET_SIZE], val;
        char bval;
        ship *shipp;            
        net_player *pl;
        ship_obj *so;
        ushort sval, ship_ets;
        int idx, player_index;
        int packet_size = 0;
        int ship_count;
        short val_short;

        BUILD_HEADER(POST_SYNC_DATA);

        // some header information for standalone packet routing purposes
        val = (ubyte)std_request;
        ADD_DATA(val);

        // the standalone has two situations
        // 1.) sending a request to the host to distribute this block of data
        // 2.) having recevied this block of data from the host, it redistributes it
        if((Game_mode & GM_STANDALONE_SERVER) && std_request && (Netgame.host != NULL)){
                // case 1, send the request                                     
                multi_io_send_reliable(Netgame.host, data, packet_size);
                return;
        }
        // case 2 for the standalone is below (as normal)

        // otherwise build the data now 
        
        // add all deleted ships
        val = (ubyte)Multi_ts_num_deleted;
        ADD_DATA(val);
        for(idx=0;idx<Multi_ts_num_deleted;idx++){
                sval = (ushort)Objects[Multi_ts_deleted_objnums[idx]].net_signature;
                ADD_USHORT(sval);
        }

        // ship count   
        ship_count = 0;
        for ( so = GET_FIRST(&Ship_obj_list); so != END_OF_LIST(&Ship_obj_list); so = GET_NEXT(so) ) {          
                shipp = &Ships[Objects[so->objnum].instance];

                // don't process non player wing ships
                if ( !(shipp->flags & SF_FROM_PLAYER_WING ) )
                        continue;

                ship_count++;
        }

        // # of ships - used multiple times in the packet
        val = (ubyte)ship_count;
        ADD_DATA(val);

        // add ship class information (85 bytes max)    
        for ( so = GET_FIRST(&Ship_obj_list); so != END_OF_LIST(&Ship_obj_list); so = GET_NEXT(so) ) {          
                shipp = &Ships[Objects[so->objnum].instance];

                // don't process non player wing ships
                if ( !(shipp->flags & SF_FROM_PLAYER_WING ) )
                        continue;               
                
                // add the net signature of the object for look up
                ADD_USHORT( Objects[so->objnum].net_signature );
                
                // add the ship info index 
                val = (ubyte)(shipp->ship_info_index);
                ADD_DATA(val);          

                // add the ships's team select index
                val = (ubyte)shipp->ts_index;
                ADD_DATA(val);
        }       

        // add weapon state information for all starting ships (241 bytes max)
        for ( so = GET_FIRST(&Ship_obj_list); so != END_OF_LIST(&Ship_obj_list); so = GET_NEXT(so) ) {
                shipp = &Ships[Objects[so->objnum].instance];

                // don't process non player wing ships
                if ( !(shipp->flags & SF_FROM_PLAYER_WING ) )
                        continue;                       

                // if this is a ship owned by a player, we should mark down his weapons bank/link settings now if we're the server
                pl = NULL;
                if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                        player_index = multi_find_player_by_net_signature(Objects[so->objnum].net_signature);
                        if(player_index == -1){
                                pl = NULL;
                        } else {
                                pl = &Net_players[player_index];
                        }
                }

                // add the net signature and other weapon information
                ADD_USHORT( Objects[so->objnum].net_signature );                

                // add number of primary and secondary banks
                bval = (char)(shipp->weapons.num_primary_banks);
                ADD_DATA(bval);
                bval = (char)(shipp->weapons.num_secondary_banks);
                ADD_DATA(bval);

                // add weapon bank status
                bval = (char)(shipp->weapons.current_primary_bank);
                if(pl != NULL){
                        pl->s_info.cur_primary_bank = bval;
                }
                // SDL_assert(bval != -1);
                ADD_DATA(bval);

                bval = (char)(shipp->weapons.current_secondary_bank);
                if(pl != NULL){
                        pl->s_info.cur_secondary_bank = bval;
                }
                // SDL_assert(bval != -1);
                ADD_DATA(bval);
                                                
                // primary weapon info
                bval = (char)(shipp->weapons.primary_bank_weapons[0]);
                ADD_DATA(bval);
                bval = (char)(shipp->weapons.primary_bank_weapons[1]);
                ADD_DATA(bval);

                // secondary weapon info
                bval = (char)(shipp->weapons.secondary_bank_weapons[0]);
                ADD_DATA(bval);
                val_short = (short)(shipp->weapons.secondary_bank_ammo[0]);
                ADD_SHORT(val_short);
                bval = (char)(shipp->weapons.secondary_bank_weapons[1]);
                ADD_DATA(bval);
                val_short = (short)(shipp->weapons.secondary_bank_ammo[1]);
                ADD_SHORT(val_short);
                bval = (char)(shipp->weapons.secondary_bank_weapons[2]);
                ADD_DATA(bval);
                val_short = (short)(shipp->weapons.secondary_bank_ammo[2]);
                ADD_SHORT(val_short);           
                
                // send primary and secondary weapon link status
                val = 0x0;
                if(shipp->flags & SF_PRIMARY_LINKED){
                        if(pl != NULL){
                                pl->s_info.cur_link_status |= (1<<0);
                        }
                        val |= (1<<0);
                }                               
                if(shipp->flags & SF_SECONDARY_DUAL_FIRE){
                        if(pl != NULL){
                                pl->s_info.cur_link_status |= (1<<1);
                        }
                        val |= (1<<1);
                }               
                // if this is a player ship add (1<<2)
                if(Objects[shipp->objnum].flags & OF_PLAYER_SHIP){
                        val |= (1<<2);
                }
                ADD_DATA(val);

                // add a ship ets value
                ship_ets = 0x0000;
                // shield ets           
                ship_ets |= ((ushort)shipp->shield_recharge_index << 8);
                // weapon ets
                ship_ets |= ((ushort)shipp->weapon_recharge_index << 4);
                // engine ets
                ship_ets |= ((ushort)shipp->engine_recharge_index);
                ADD_USHORT(ship_ets);

        }

        // 2 cases, if I'm the host on a standalone, I should be sending this to the standalone only
        // or if I'm the server as well as the host, I should be sending this to all players
        if(Net_player->flags & NETINFO_FLAG_GAME_HOST){
                if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                        // broadcast
                        if(p == NULL){                          
                                multi_io_send_to_all_reliable(data, packet_size);
                        }
                        // send to a specific player
                        else {
                                multi_io_send_reliable(p, data, packet_size);
                        }
                } else {
                        multi_io_send_reliable(Net_player, data, packet_size);
                }
        }
        // standalone mode
        else {
                // broadcast
                if(p == NULL){
                        multi_io_send_to_all_reliable(data, packet_size);
                }
                // send to a specific player
                else {
                        multi_io_send_reliable(p, data, packet_size);
                }
        }
}

void process_post_sync_data_packet(ubyte *data, header *hinfo)
{
        ubyte val, sinfo_index, ts_index;
        char b;
        ushort net_sig, ship_ets, sval;
        ship *shipp;
        object *objp;
        int idx;
        int offset = HEADER_LENGTH;
        int ship_count;
        short val_short;

        // packet routing information
        GET_DATA(val);

        // if I'm the host on a standalone, this is going to be a request to send the data to the standalone to be routed
        if((Net_player->flags & NETINFO_FLAG_GAME_HOST) && !(Net_player->flags & NETINFO_FLAG_AM_MASTER) && val){
                PACKET_SET_SIZE();

                // at this point we want to delete all necessary ships, change all necessary ship classes, and set all weapons up
                multi_ts_create_wings();
                
                // send to the standalone through my socket
                send_post_sync_data_packet(Net_player);
                return;
        }

        // process player

        // add all deleted ships
        GET_DATA(val);
        Multi_ts_num_deleted = (int)val;
        for(idx=0;idx<Multi_ts_num_deleted;idx++){
                // get the ship's objnum
                GET_USHORT(sval);
                objp = NULL;
                objp = multi_get_network_object(sval);
                if(objp != NULL){
                        // delete the ship appropriately
                        // mark the object as having been deleted
                        Multi_ts_deleted_objnums[idx] = OBJ_INDEX(objp);

                        // delete the ship
                        ship_add_exited_ship(&Ships[objp->instance], SEF_PLAYER_DELETED);
                        obj_delete(Multi_ts_deleted_objnums[idx]);                      
                        ship_wing_cleanup(objp->instance,&Wings[Ships[objp->instance].wingnum]);
                } else {
                        Multi_ts_num_deleted--;
                        nprintf(("Network","Couldn't find object by net signature for ship delete in post sync data packet\n"));
                }
        }

        // ship count
        GET_DATA(val);
        ship_count = val;

        // process ship class information
        for(idx=0; idx<ship_count; idx++){      
                // get the object's net signature
                GET_USHORT(net_sig);
                GET_DATA(sinfo_index);
                GET_DATA(ts_index);

                // attempt to get the object
                objp = multi_get_network_object(net_sig);

                // make sure we found a ship
                SDL_assert((objp != NULL) && (objp->type == OBJ_SHIP));

                // set the ship to be the right class
                change_ship_type(objp->instance,(int)sinfo_index);

                // set the ship's team select index
                Ships[objp->instance].ts_index = (int)ts_index;         
        }

        // process ship weapon state info
        for(idx=0; idx<ship_count; idx++){      
                // get the object's net signature
                GET_USHORT(net_sig);

                // attempt to get the object
                objp = multi_get_network_object(net_sig);

                // make sure we found a ship
                SDL_assert((objp != NULL) && (objp->type == OBJ_SHIP));

                // get a pointer to the ship
                shipp = &Ships[objp->instance];

                // get number of primary and secondary banks;
                GET_DATA(b);
                SDL_assert( b != -1 );
                shipp->weapons.num_primary_banks = (int)b;

                GET_DATA(b);
                SDL_assert( b != -1 );
                shipp->weapons.num_secondary_banks = (int)b;

                // get bank selection info
                GET_DATA(b);
                if ( b == -1 ){
                        b = 0;
                }
                shipp->weapons.current_primary_bank = (int)b;

                GET_DATA(b);
                if ( b == -1 ){
                        b = 0;
                }
                shipp->weapons.current_secondary_bank = (int)b;         

                        // primary weapon info
                GET_DATA(b);
                shipp->weapons.primary_bank_weapons[0] = (int)b;

                GET_DATA(b);
                shipp->weapons.primary_bank_weapons[1] = (int)b;

                // secondary weapon info
                GET_DATA(b);
                shipp->weapons.secondary_bank_weapons[0] = (int)b;
                GET_SHORT(val_short);
                shipp->weapons.secondary_bank_ammo[0] = (int)val_short;

                GET_DATA(b);
                shipp->weapons.secondary_bank_weapons[1] = (int)b;
                GET_SHORT(val_short);
                shipp->weapons.secondary_bank_ammo[1] = (int)val_short;

                GET_DATA(b);
                shipp->weapons.secondary_bank_weapons[2] = (int)b;
                GET_SHORT(val_short);
                shipp->weapons.secondary_bank_ammo[2] = (int)val_short;

                // other flags
                val = 0x0;
                GET_DATA(val);

                if(val & (1<<0)){
                        shipp->flags |= SF_PRIMARY_LINKED;                              
                }                               
                if(val & (1<<1)){               
                        shipp->flags |= SF_SECONDARY_DUAL_FIRE;                 
                }
                Objects[shipp->objnum].flags &= ~(OF_PLAYER_SHIP);
                Objects[shipp->objnum].flags &= ~(OF_COULD_BE_PLAYER);
                if(val & (1<<2)){
                        Objects[shipp->objnum].flags |= OF_PLAYER_SHIP;
                } else {
                        obj_set_flags( &Objects[shipp->objnum], Objects[shipp->objnum].flags | OF_COULD_BE_PLAYER );
                }

                // get ship ets
                GET_USHORT(ship_ets);
                // shield ets
                shipp->shield_recharge_index = ((ship_ets & 0x0f00) >> 8);
                // weapon ets
                shipp->weapon_recharge_index = ((ship_ets & 0x00f0) >> 4);
                // engine ets
                shipp->engine_recharge_index = (ship_ets & 0x000f);     
        }
        PACKET_SET_SIZE();

        // ack the server
        Net_player->state = NETPLAYER_STATE_POST_DATA_ACK;
        send_netplayer_update_packet();

        // the standalone server will receive this packet from the host of the game, to be applied locally and
        // also to be rebroadcast. 
        if(Game_mode & GM_STANDALONE_SERVER){
                // update player ets settings
                for(idx=0;idx<MAX_PLAYERS;idx++){
                        if(MULTI_CONNECTED(Net_players[idx]) && !MULTI_STANDALONE(Net_players[idx]) && !MULTI_PERM_OBSERVER(Net_players[idx]) && (Net_players[idx].player->objnum != -1)){
                                multi_server_update_player_weapons(&Net_players[idx],&Ships[Objects[Net_players[idx].player->objnum].instance]);
                        }
                }                       
                
                send_post_sync_data_packet(NULL,0);
        }
}

void send_wss_slots_data_packet(int team_num,int final,net_player *p,int std_request)
{
        ubyte data[MAX_PACKET_SIZE],val;
        short val_short;
        int idx,i;
        int packet_size = 0;

        // build the header
        BUILD_HEADER(WSS_SLOTS_DATA);

        // some header information for standalone packet routing purposes
        val = (ubyte)std_request;
        ADD_DATA(val);

        // add the team #
        val = (ubyte)team_num;
        ADD_DATA(val);
        
        // add whether this is the final packet or not
        val = (ubyte)final;
        ADD_DATA(val);

        // the standalone has two situations
        // 1.) sending a request to the host to distribute this block of data
        // 2.) having recevied this block of data from the host, it redistributes it
        if((Game_mode & GM_STANDALONE_SERVER) && std_request){
                // case 1, send the request                                     
                multi_io_send_reliable(Netgame.host, data, packet_size);
                return;
        }
        // case 2 for the standalone is below (as normal)

        // add all the slots
        for(idx=0;idx<MULTI_TS_NUM_SHIP_SLOTS;idx++){
                // add the ship class
                val = (ubyte)Wss_slots_teams[team_num][idx].ship_class;
                ADD_DATA(val);

                // add the weapons
                for(i = 0;i<MAX_WL_WEAPONS;i++){
                        val = (ubyte)Wss_slots_teams[team_num][idx].wep[i];
                        ADD_DATA(val);
                }

                // add the weapon counts
                for(i = 0;i<MAX_WL_WEAPONS;i++){
                        val_short = (short)Wss_slots_teams[team_num][idx].wep_count[i];
                        ADD_SHORT(val_short);
                }
        }

                // 2 cases, if I'm the host on a standalone, I should be sending this to the standalone only
        // or if I'm the server as well as the host, I should be sending this to all players
        if(Net_player->flags & NETINFO_FLAG_GAME_HOST){
                if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                        // broadcast
                        if(p == NULL){                          
                                multi_io_send_to_all_reliable(data, packet_size);
                        }
                        // send to a specific player
                        else {
                                multi_io_send_reliable(p, data, packet_size);
                        }
                } else {
                        multi_io_send_reliable(Net_player, data, packet_size);
                }
        }
        // standalone mode
        else {
                // broadcast
                if(p == NULL){
                        multi_io_send_to_all_reliable(data, packet_size);                       
                }
                // send to a specific player
                else {
                        multi_io_send_reliable(p, data, packet_size);
                }
        }       
}

void process_wss_slots_data_packet(ubyte *data, header *hinfo)
{
        ubyte val,team_num,final;
        int idx,i;
        int offset = HEADER_LENGTH;
        short val_short;

        // packet routing information
        GET_DATA(val);

        // get team data
        GET_DATA(team_num);

        // get whether this is the final packet or not
        GET_DATA(final);

        // if I'm the host on a standalone, this is going to be a request to send the data to the standalone to be routed
        if((Net_player->flags & NETINFO_FLAG_GAME_HOST) && !(Net_player->flags & NETINFO_FLAG_AM_MASTER) && val){
                PACKET_SET_SIZE();

                // send to the standalone through my socket
                send_wss_slots_data_packet((int)team_num,(int)final,Net_player);
                return;
        }       

        // read in all the slot data
        for(idx=0;idx<MULTI_TS_NUM_SHIP_SLOTS;idx++){
                memset(&Wss_slots_teams[team_num][idx],0,sizeof(wss_unit));

                // get the ship class
                GET_DATA(val);
                Wss_slots_teams[team_num][idx].ship_class = (int)val;

                // get the weapons
                for(i = 0;i<MAX_WL_WEAPONS;i++){
                        GET_DATA(val);
                        Wss_slots_teams[team_num][idx].wep[i] = (int)val;

                        // check for signed/unsigned problems
                        if(Wss_slots_teams[team_num][idx].wep[i] == 255){
                                Wss_slots_teams[team_num][idx].wep[i] = -1;
                        }
                } 

                // get the weapon counts
                for(i = 0;i<MAX_WL_WEAPONS;i++){
                        GET_SHORT(val_short);
                        Wss_slots_teams[team_num][idx].wep_count[i] = (int)val_short;
                }
        }
        PACKET_SET_SIZE();

        // update my netplayer state if this is the final packet
        if(final){
                Net_player->state = NETPLAYER_STATE_WSS_ACK;
                send_netplayer_update_packet();
        }

        // the standalone server will receive this packet from the host of the game, to be applied locally and
        // also to be rebroadcast. 
        if(Game_mode & GM_STANDALONE_SERVER){
                send_wss_slots_data_packet((int)team_num,(int)final,NULL,0);
        } else {
                // add some mission sync text
                multi_common_add_text(XSTR("Weapon slots packet\n",735),1);
        }
}

#define OBJ_VISIBILITY_DOT                                      0.6f    

// send and receive packets for shield explosion information
void send_shield_explosion_packet( int objnum, int tri_num, vector hit_pos )
{
        int packet_size, i;
        ubyte data[MAX_PACKET_SIZE], utri_num;

        Int3();
        // SDL_assert(!(Netgame.debug_flags & NETD_FLAG_CLIENT_NODAMAGE));

        SDL_assert( tri_num < UCHAR_MAX );
        utri_num = (ubyte)tri_num;

        // for each player, determine if this object is behind the player -- if so, don't
        // send the packet.
        for ( i = 0; i < MAX_PLAYERS; i++ ) {
                if ( MULTI_CONNECTED(Net_players[i]) && (&Net_players[i] != Net_player) ) {
                        float           dot;
                        vector  eye_to_obj_vec, diff, eye_pos;
                        matrix  eye_orient;

                        eye_pos = Net_players[i].s_info.eye_pos;
                        eye_orient = Net_players[i].s_info.eye_orient;

                        // check for same vectors
                        vm_vec_sub(&diff, &Objects[objnum].pos, &eye_pos);
                        if ( vm_vec_mag_quick(&diff) < 0.01 ){
                                continue;
                        }

                        vm_vec_normalized_dir(&eye_to_obj_vec, &Objects[objnum].pos, &eye_pos);
                        dot = vm_vec_dot(&eye_orient.v.fvec, &eye_to_obj_vec);

                        if ( dot < OBJ_VISIBILITY_DOT ){
                                continue;
                        }

                        BUILD_HEADER(SHIELD_EXPLOSION);

                        ADD_USHORT( Objects[objnum].net_signature );
                        ADD_DATA(utri_num);                     
                        
                        multi_io_send(&Net_players[i], data, packet_size);
                }
        }
}

void add_shield_point_multi(int objnum, int tri_num, vector *hit_pos);

void process_shield_explosion_packet( ubyte *data, header *hinfo)
{
        int offset;
        ushort signature;
        ubyte utri_num;
        object *objp;

        // get the shield hit data
        offset = HEADER_LENGTH;
        GET_USHORT(signature);
        GET_DATA(utri_num);
        //GET_DATA(hit_pos);
        PACKET_SET_SIZE();

        // find the object with this signature.  If found, then do a shield explosion
        objp = multi_get_network_object( signature );
        if ( objp ) {
                polymodel *pm;
                shield_info *shieldp;
                shield_tri stri;
                vector hit_pos;
                int i;

                // given the tri num, find the local position which is the average of the
                // three vertices of the triangle affected.  Use this average point as the hit
                // point
                // SDL_assert( objp->type == OBJ_SHIP );
                if(objp->type != OBJ_SHIP){
                        return;
                }

                pm = model_get(Ships[objp->instance].modelnum);
                shieldp = &pm->shield;
                SDL_assert( utri_num < shieldp->ntris );
                stri = shieldp->tris[utri_num];
                vm_vec_zero(&hit_pos);
                for ( i = 0; i < 3; i++ ) {
                        vm_vec_add2( &hit_pos, &(shieldp->verts[stri.verts[i]].pos) );
                }
                vm_vec_scale( &hit_pos, 1.0f/3.0f );
                add_shield_point_multi( OBJ_INDEX(objp), utri_num, &hit_pos );
        }
}

void send_player_stats_block_packet(net_player *pl, int stats_code, net_player *target)
{
        scoring_struct *sc;
        ubyte data[MAX_PACKET_SIZE], val;
        int idx;                
        int packet_size = 0;

        ushort u_tmp;
        int i_tmp;

        sc = &pl->player->stats;

        // build the header
        BUILD_HEADER(PLAYER_STATS);     

        // add the player id
        ADD_SHORT(pl->player_id);

        // add the byte indicating whether these stats are all-time or not
        val = (ubyte)stats_code;
        ADD_DATA(val);  
        
        // kill information - alltime
        switch(stats_code){
        case STATS_ALLTIME:     
                // alltime kills
                for(idx=0;idx<MAX_SHIP_TYPES;idx++){
                        u_tmp = sc->kills[idx];
                        ADD_USHORT(u_tmp);
                }
                // medal information
                for(idx=0;idx<NUM_MEDALS;idx++){
                        i_tmp = sc->medals[idx];
                        ADD_INT(i_tmp);
                }

                ADD_INT(sc->score);
                ADD_INT(sc->rank);
                ADD_INT(sc->assists);
                ADD_INT(sc->kill_count);
                ADD_INT(sc->kill_count_ok);
                ADD_UINT(sc->p_shots_fired);
                ADD_UINT(sc->s_shots_fired);
                ADD_UINT(sc->p_shots_hit);
                ADD_UINT(sc->s_shots_hit);
                ADD_UINT(sc->p_bonehead_hits);
                ADD_UINT(sc->s_bonehead_hits);
                ADD_INT(sc->bonehead_kills);

                ADD_UINT(sc->missions_flown);
                ADD_UINT(sc->flight_time);
                ADD_INT(sc->last_flown);
                ADD_INT(sc->last_backup);
                break;

        case STATS_MISSION:     
                // mission OKkills              
                for(idx=0;idx<MAX_SHIP_TYPES;idx++){
                        u_tmp = sc->m_okKills[idx];
                        ADD_USHORT(u_tmp);                      
                }
        
                ADD_INT(sc->m_score);
                ADD_INT(sc->m_assists);
                ADD_INT(sc->m_kill_count);
                ADD_INT(sc->m_kill_count_ok);
                ADD_UINT(sc->mp_shots_fired);
                ADD_UINT(sc->ms_shots_fired);
                ADD_UINT(sc->mp_shots_hit);
                ADD_UINT(sc->ms_shots_hit);
                ADD_UINT(sc->mp_bonehead_hits);
                ADD_UINT(sc->ms_bonehead_hits);
                ADD_INT(sc->m_bonehead_kills);
                ADD_INT(sc->m_player_deaths);
                ADD_INT(sc->m_medal_earned);
                break;

        case STATS_MISSION_KILLS:               
                ADD_INT(sc->m_kill_count);
                ADD_INT(sc->m_kill_count_ok);
                ADD_INT(sc->m_assists);
                break;          

        case STATS_DOGFIGHT_KILLS:
                for(idx=0; idx<MAX_PLAYERS; idx++){
                        u_tmp = sc->m_dogfight_kills[idx];
                        ADD_USHORT(u_tmp);
                }
                ADD_INT(sc->m_kill_count);
                ADD_INT(sc->m_kill_count_ok);
                ADD_INT(sc->m_assists);
                break;          
        }

        SDL_assert(packet_size < MAX_PACKET_SIZE);

        // if we're a client, always send the data to the server
        if(!(Net_player->flags & NETINFO_FLAG_AM_MASTER)){
                multi_io_send_reliable(Net_player, data, packet_size);          
        }
        // otherwise do server specific stuff
        else {
                // send to a specific target
                if(target != NULL){
                        multi_io_send_reliable(target, data, packet_size);                      
                }
                // otherwise, send to everyone
                else {                  
                        multi_io_send_to_all_reliable(data, packet_size);
                }
        }
}

void process_player_stats_block_packet(ubyte *data, header *hinfo)
{
        ubyte val;
        int player_num,idx;
        scoring_struct *sc,bogus;
        short player_id;
        int offset = HEADER_LENGTH;
        ushort u_tmp;
        int i_tmp;

        // nprintf(("Network","----------++++++++++********RECEIVED STATS***********+++++++++----------\n"));

        // get the player who these stats are for
        GET_SHORT(player_id);   
        player_num = find_player_id(player_id);
        if (player_num == -1) {
                nprintf(("Network", "Couldn't find player for stats update!\n"));
                ml_string("Couldn't find player for stats update!\n");

                sc = &bogus;
                Int3();
        } else {
                sc = &Net_players[player_num].player->stats;
        }

        // get the stats code
        GET_DATA(val);  
        switch(val){
        case STATS_ALLTIME:
                ml_string("Received STATS_ALLTIME\n");

                // kills - alltime
                for (idx=0; idx<MAX_SHIP_TYPES; idx++) {
                        GET_USHORT(u_tmp);
                        sc->kills[idx] = u_tmp;
                }

                // read in the stats
                for (idx=0; idx<NUM_MEDALS; idx++) {
                        GET_INT(i_tmp);
                        sc->medals[idx] = i_tmp;
                }

                GET_INT(sc->score);
                GET_INT(sc->rank);
                GET_INT(sc->assists);
                GET_INT(sc->kill_count);
                GET_INT(sc->kill_count_ok);
                GET_UINT(sc->p_shots_fired);
                GET_UINT(sc->s_shots_fired);
                GET_UINT(sc->p_shots_hit);
                GET_UINT(sc->s_shots_hit);
                GET_UINT(sc->p_bonehead_hits);
                GET_UINT(sc->s_bonehead_hits);
                GET_INT(sc->bonehead_kills);

                GET_UINT(sc->missions_flown);
                GET_UINT(sc->flight_time);
                GET_INT(sc->last_flown);
                GET_INT(sc->last_backup);
                break;

        case STATS_MISSION:
                ml_string("Received STATS_MISSION\n");

                // kills - mission OK                   
                for (idx=0; idx<MAX_SHIP_TYPES; idx++) {
                        GET_USHORT(u_tmp);
                        sc->m_okKills[idx] = u_tmp;                     
                }
                
                GET_INT(sc->m_score);
                GET_INT(sc->m_assists);
                GET_INT(sc->m_kill_count);
                GET_INT(sc->m_kill_count_ok);
                GET_UINT(sc->mp_shots_fired);
                GET_UINT(sc->ms_shots_fired);
                GET_UINT(sc->mp_shots_hit);
                GET_UINT(sc->ms_shots_hit);
                GET_UINT(sc->mp_bonehead_hits);
                GET_UINT(sc->ms_bonehead_hits);
                GET_INT(sc->m_bonehead_kills);
                GET_INT(sc->m_player_deaths);
                GET_INT(sc->m_medal_earned);
                break;

        case STATS_MISSION_KILLS:               
                ml_string("Received STATS_MISSION_KILLS\n");

                GET_INT(sc->m_kill_count);
                GET_INT(sc->m_kill_count_ok);
                GET_INT(sc->m_assists);
                break;          

        case STATS_DOGFIGHT_KILLS:
                ml_string("Received STATS_DOGFIGHT_KILLS\n");
                if(player_num >= 0){
                        ml_printf("Dogfight stats for %s", Net_players[player_num].player->callsign);
                }
                for(idx=0; idx<MAX_PLAYERS; idx++){
                        GET_USHORT(u_tmp);
                        sc->m_dogfight_kills[idx] = u_tmp;
                        if(player_num >= 0){                            
                                ml_printf("%d", Net_players[player_num].player->stats.m_dogfight_kills[idx]);
                        }
                }
                GET_INT(sc->m_kill_count);
                GET_INT(sc->m_kill_count_ok);
                GET_INT(sc->m_assists);         
                break;          
        }
        PACKET_SET_SIZE();

        // if I'm the server of the game, I should always rebroadcast these stats
        if ((Net_player->flags & NETINFO_FLAG_AM_MASTER) && (sc != &bogus)) {
                // make sure these are alltime stats
                SDL_assert(val == STATS_ALLTIME);

                multi_broadcast_stats(STATS_ALLTIME);
        }
}

// called to create asteroid stuff
void send_asteroid_create( object *new_objp, object *parent_objp, int asteroid_type, vector *relvec )
{
        int packet_size;
        ubyte data[MAX_PACKET_SIZE];
        ubyte packet_type, atype;
        vector vec;

        vm_vec_zero(&vec);
        if (relvec != NULL )
                vec = *relvec;

        BUILD_HEADER( ASTEROID_INFO );
        packet_type = ASTEROID_CREATE;

        SDL_assert( asteroid_type < UCHAR_MAX );
        atype = (ubyte)asteroid_type;

        ADD_DATA( packet_type );
        ADD_USHORT( parent_objp->net_signature );
        ADD_USHORT( new_objp->net_signature );
        ADD_DATA( atype );
        //ADD_DATA( vec );
        add_vector_data( data, &packet_size, vec );

        multi_io_send_to_all(data, packet_size);
}

void send_asteroid_throw( object *objp )
{
        int packet_size;
        ubyte data[MAX_PACKET_SIZE], packet_type;

        BUILD_HEADER( ASTEROID_INFO );

        // this packet type is an asteroid throw
        packet_type = ASTEROID_THROW;
        ADD_DATA( packet_type );
        ADD_USHORT( objp->net_signature );
        //ADD_DATA( objp->pos );
        add_vector_data( data, &packet_size, objp->pos );
        //ADD_DATA( objp->phys_info.vel );
        add_vector_data( data, &packet_size, objp->phys_info.vel );
        
        multi_io_send_to_all(data, packet_size);
}

void send_asteroid_hit( object *objp, object *other_objp, vector *hitpos, float damage )
{
        int packet_size;
        ubyte data[MAX_PACKET_SIZE], packet_type;
        vector vec;

        vm_vec_zero(&vec);
        if ( hitpos != NULL )
                vec = *hitpos;

        // build up an asteroid hit packet
        BUILD_HEADER( ASTEROID_INFO );
        packet_type = ASTEROID_HIT;
        ADD_DATA( packet_type );
        ADD_USHORT( objp->net_signature );

        if(other_objp == NULL){
                ushort invalid_sig = 0xffff;
                ADD_USHORT(invalid_sig);
        } else {
                ADD_USHORT( other_objp->net_signature );
        }
        //ADD_DATA( vec );
        add_vector_data( data, &packet_size, vec );
        ADD_FLOAT( damage );
        
        multi_io_send_to_all(data, packet_size);
}

void process_asteroid_info( ubyte *data, header *hinfo )
{
        int offset;
        ubyte packet_type;

        offset = HEADER_LENGTH;
        GET_DATA( packet_type );

        // based on the packet type, do something interesting with an asteroid!
        switch( packet_type ) {

        case ASTEROID_CREATE: {
                ushort psignature, signature;
                ubyte atype;
                vector relvec = ZERO_VECTOR;
                object *parent_objp;

                GET_USHORT( psignature );
                GET_USHORT( signature );
                GET_DATA( atype );
                //GET_DATA( relvec );
                get_vector_data( data, &offset, relvec );

                // after getting the values, set the next network signature, and call the create sub function
                multi_set_network_signature( signature, MULTI_SIG_ASTEROID );
                parent_objp = multi_get_network_object( psignature );
                if ( parent_objp ) {
                        asteroid_sub_create( parent_objp, atype, &relvec );
                } else {
                        nprintf(("Network", "Couldn't create asteroid because parent wasn't found!!!\n"));
                }


                break;
        }

                // asteroid throw packet -- asteroid has wrapped bounds
        case ASTEROID_THROW: {
                ushort signature;
                vector pos = ZERO_VECTOR, vel = ZERO_VECTOR;
                object *objp;

                GET_USHORT( signature );
                //GET_DATA( pos );
                get_vector_data( data, &offset, pos );
                //GET_DATA( vel );
                get_vector_data( data, &offset, vel );
                objp = multi_get_network_object( signature );
                if ( !objp ) {
                        nprintf(("Network", "Couldn't throw asteroid because couldn't find it\n"));
                        break;
                }
                objp->pos = pos;
                objp->phys_info.vel = vel;
                objp->phys_info.desired_vel = vel;
                break;
        }

        case ASTEROID_HIT: {
                ushort signature, osignature;
                object *objp, *other_objp;
                vector hitpos = ZERO_VECTOR;
                float damage;

                GET_USHORT( signature );
                GET_USHORT( osignature );
                //GET_DATA( hitpos );
                get_vector_data( data, &offset, hitpos );
                GET_FLOAT( damage );

                objp = multi_get_network_object( signature );
                if(osignature == 0xffff){
                        other_objp = NULL; 
                } else {
                        other_objp = multi_get_network_object( osignature );
                }
                if ( !objp ) {
                        nprintf(("Network", "Cannot hit asteroid because signature isn't found\n"));
                        break;
                }

                if ( IS_VEC_NULL(&hitpos) ){
                        asteroid_hit( objp, other_objp, NULL, damage );
                } else {
                        asteroid_hit( objp, other_objp, &hitpos, damage );
                }
                
                // if we know the other object is a weapon, then do a weapon hit to kill the weapon
                if ( other_objp && (other_objp->type == OBJ_WEAPON) ){
                        weapon_hit( other_objp, objp, &hitpos );
                }
                break;
        }

        default:
                Int3();
                break;
        }

        PACKET_SET_SIZE();
}

void send_host_restr_packet(const char *callsign, int code, int mode)
{
        ubyte data[MAX_PACKET_SIZE],val;
        int packet_size = 0;

        // build the header and add the opcode
        BUILD_HEADER(HOST_RESTR_QUERY);
        val = (ubyte)code;
        ADD_DATA(val);
        val = (ubyte)mode;
        ADD_DATA(val);

        // add the callsign
        ADD_STRING(callsign);

        // if I'm the standalone server, I should be sending this to the game host
        if((Game_mode & GM_STANDALONE_SERVER) && (Netgame.host != NULL)){               
                multi_io_send_reliable(Netgame.host, data, packet_size);
        } 
        // otherwise if I'm the host, I should be sending a reply back to the standalone server
        else {
                SDL_assert(Net_player->flags & NETINFO_FLAG_GAME_HOST);         
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}       

void process_host_restr_packet(ubyte *data, header *hinfo)
{
        char callsign[255];
        ubyte code,mode;
        int offset = HEADER_LENGTH;

        // get the opcode and the callsign
        GET_DATA(code);
        GET_DATA(mode);
        GET_STRING(callsign);
        PACKET_SET_SIZE();

        // do code specific operations
        switch(code){
        // query to the host from standalone
        case 0:         
                SDL_assert((Net_player->flags & NETINFO_FLAG_GAME_HOST) && !(Net_player->flags & NETINFO_FLAG_AM_MASTER));

                // set the join mode
                Multi_join_restr_mode = mode;

                // set the timestamp
                Multi_restr_query_timestamp = timestamp(MULTI_QUERY_RESTR_STAMP);

                // notify the host of the event
                gamesnd_play_iface(SND_BRIEF_STAGE_CHG_FAIL);
                HUD_printf(XSTR("Player %s has tried to join - allow (y/n) ?",736),callsign);
                break;
                
        // affirmative reply from the host to the standalone
        case 1:
                SDL_assert(Game_mode & GM_STANDALONE_SERVER);           

                // let the player join if the timestamp has not already elapsed on the server
                if(Multi_restr_query_timestamp != -1){
                        multi_process_valid_join_request(&Multi_restr_join_request,&Multi_restr_addr,(int)mode);
                }
                break;  

        // negative reply
        case 2 :
                SDL_assert(Game_mode & GM_STANDALONE_SERVER);
                Netgame.flags &= ~(NG_FLAG_INGAME_JOINING);
                Multi_restr_query_timestamp = -1;
                break;
        }
}

void send_netgame_end_error_packet(int notify_code,int err_code)
{
        ubyte data[10];
        char code;
        int packet_size = 0;

        // only the server should ever be here - although this might change if for some reason the host wants to end the game
        SDL_assert(Net_player->flags & NETINFO_FLAG_AM_MASTER);
        
        // build the header and add the notification and error codes
        BUILD_HEADER(NETGAME_END_ERROR);
        code = (char)notify_code;
        ADD_DATA(code);
        code = (char)err_code;
        ADD_DATA(code);

        // send the packet      
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_netgame_end_error_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        char notify_code,error_code;

        // get the error and notification codes
        GET_DATA(notify_code);
        GET_DATA(error_code);
        PACKET_SET_SIZE();

        // quit the game
        multi_quit_game(PROMPT_NONE,notify_code,error_code);    
}

// sends info that a countermeasure succeeded.
void send_countermeasure_success_packet( int objnum )
{
        int pnum, packet_size;
        ubyte data[MAX_PACKET_SIZE];

        pnum = multi_find_player_by_object( &Objects[objnum] );
        if ( pnum == -1 ) {
                nprintf(("Network", "Coulnd't find player for countermeasure success packet\n"));
                return;
        }

        BUILD_HEADER(COUNTERMEASURE_SUCCESS);   
        multi_io_send(&Net_players[pnum], data, packet_size);
}

// start the flashing of my hud gauge
void process_countermeasure_success_packet( ubyte *data, header *hinfo )
{
        int offset;

        offset = HEADER_LENGTH;
        PACKET_SET_SIZE();

        hud_start_text_flash(XSTR("Evaded", 1430), 800);
        snd_play(&Snds[SND_MISSILE_EVADED_POPUP]);
}

#define UPDATE_IS_PAUSED                (1<<0)
#define UPDATE_HULL_INFO                (1<<1)

void send_client_update_packet(net_player *pl)
{
        ubyte data[MAX_PACKET_SIZE],val;
        int packet_size = 0;

        // build the header
        BUILD_HEADER(CLIENT_UPDATE);

        val = 0;        

        // add the pause status
        if ( Multi_pause_status ) {
                val |= UPDATE_IS_PAUSED;
        } else if ( (Game_mode & GM_IN_MISSION) && !(pl->flags & NETINFO_FLAG_INGAME_JOIN) && !(NETPLAYER_IS_OBSERVER(pl)) && !(NETPLAYER_IS_DEAD(pl)) && (Objects[pl->player->objnum].type == OBJ_SHIP) ) {
                val |= UPDATE_HULL_INFO;
                SDL_assert( Player_ship );                      // I"d better have one of these!!!!
        }

        ADD_DATA(val);

        // if paused, add the net address of the guy who paused
        if(val & UPDATE_IS_PAUSED){
                SDL_assert(Multi_pause_pauser != NULL);
                ADD_SHORT(Multi_pause_pauser->player_id);
        }

        // when not paused, send hull/shield/subsystem updates to all clients (except for ingame joiners)
        if ( val & UPDATE_HULL_INFO ) {
                object *objp;
                ubyte percent, ns, threats;
                ship_info *sip;
                ship *shipp;
                ship_subsys *subsysp;
                int i;

                // get the object for the player
                SDL_assert( pl->player->objnum != -1 );

                objp = &Objects[pl->player->objnum];

                SDL_assert ( objp->type == OBJ_SHIP );
                shipp = &Ships[objp->instance];
                sip = &Ship_info[shipp->ship_info_index];

                // hull strength and sheild mesh information are floats (as a percentage).  Pass the integer
                // percentage value since that should be close enough
                float temp = (objp->hull_strength  / sip->initial_hull_strength * 100.0f);              
                if(temp < 0.0f){
                        percent = 0;
                } else {
                        percent = (ubyte)temp;
                }
                ADD_DATA( percent );

                for (i = 0; i < MAX_SHIELD_SECTIONS; i++ ) {
                        percent = (ubyte)(objp->shields[i] / (sip->shields / MAX_SHIELD_SECTIONS) * 100.0f);
                        ADD_DATA( percent );
                }

                // add the data for the subsystem hits.  We can assume that the lists will be the same side of
                // both machines. Added as percent since that number <= 100

                // also write out the number of subsystems.  We do this because the client might not know
                // about the object he is getting data for.  (i.e. he killed the object already).
                ns = (ubyte)sip->n_subsystems;
                ADD_DATA( ns );

                // now the subsystems.
                for ( subsysp = GET_FIRST(&shipp->subsys_list); subsysp != END_OF_LIST(&shipp->subsys_list); subsysp = GET_NEXT(subsysp) ) {
                        percent = (ubyte)(subsysp->current_hits / subsysp->system_info->max_hits * 100.0f);
                        ADD_DATA( percent );
                }

                // compute the threats for this player.  Only compute the threats if this player is actually
                // playing (i.e. he has a ship)
                hud_update_reticle( pl->player );
                threats = (ubyte)pl->player->threat_flags;
                ADD_DATA( threats );

                // add his energy level for guns
                ADD_FLOAT(shipp->weapon_energy);

                // add his secondary bank ammo
                ADD_INT(shipp->weapons.num_secondary_banks);
                for(i=0; i<shipp->weapons.num_secondary_banks; i++){
                        ADD_INT(shipp->weapons.secondary_bank_ammo[i]);
                }
        }

        // add pl
        ADD_INT(pl->sv_last_pl);

        // send the packet reliably to the player       
        multi_io_send(pl, data, packet_size);
}

void process_client_update_packet(ubyte *data, header *hinfo)
{
        ubyte val;
        short pauser;
        int player_index;
        int is_paused, have_hull_info;
        int ammo_count;
        int ammo[10];
        float weapon_energy;
        int offset = HEADER_LENGTH;

        // get the header byte containing useful information
        GET_DATA(val);

        is_paused = (val & UPDATE_IS_PAUSED)?1:0;
        have_hull_info = (val & UPDATE_HULL_INFO)?1:0;

        // if we are paused, get who paused
        if(is_paused){          
                GET_SHORT(pauser);
                player_index = find_player_id(pauser);
                if(player_index != -1){
                        Multi_pause_pauser = &Net_players[player_index];
                } else {
                        Multi_pause_pauser = NULL;
                }       
        }

        // if we have hull information, then read it in.
        if ( have_hull_info ) {
                float val;
                ship_info *sip;
                ship *shipp;
                ubyte hull_percent, shield_percent[MAX_SHIELD_SECTIONS], n_subsystems, subsystem_percent[MAX_MODEL_SUBSYSTEMS], threats;
                ubyte ub_tmp;
                ship_subsys *subsysp;
                object *objp;
                int i;

                // hull strength and sheild mesh information are floats (as a percentage).  Pass the integer
                // percentage value since that should be close enough
                GET_DATA( hull_percent );

                for (i = 0; i < MAX_SHIELD_SECTIONS; i++ ){
                        GET_DATA(ub_tmp);
                        shield_percent[i] = ub_tmp;
                }

                // get the data for the subsystems
                GET_DATA( n_subsystems );
                for ( i = 0; i < n_subsystems; i++ ){
                        GET_DATA(ub_tmp);
                        subsystem_percent[i] = ub_tmp;
                }

                GET_DATA( threats );

                // add his energy level for guns
                GET_FLOAT(weapon_energy);
                
                // add his secondary bank ammo
                GET_INT(ammo_count);
                for(i=0; i<ammo_count; i++){
                        GET_INT(ammo[i]);
                }

                // assign the above information to my ship, assuming that I can find it!  Ingame joiners might get this
                // packet because of delay between reliable packet acknowledging my ingame ship and the start of these
                // UDP client update packets.  Only read this info if I have a ship.
                if ( !(Net_player->flags & NETINFO_FLAG_INGAME_JOIN) && (Player_ship != NULL) && (Player_obj != NULL) && (Net_player != NULL)) {                        
                        shipp = Player_ship;
                        objp = Player_obj;
                        sip = &Ship_info[shipp->ship_info_index];

                        val = hull_percent * sip->initial_hull_strength / 100.0f;
                        objp->hull_strength = val;

                        for ( i = 0; i < MAX_SHIELD_SECTIONS; i++ ) {
                                val = (shield_percent[i] * sip->shields / 100.0f) / MAX_SHIELD_SECTIONS;
                                objp->shields[i] = val;
                        }

                        // for sanity, be sure that the number of susbystems that I read in matches the player.  If not,
                        // then don't read these in.
                        if ( n_subsystems == sip->n_subsystems ) {

                                n_subsystems = 0;               // reuse this variable
                                for ( subsysp = GET_FIRST(&shipp->subsys_list); subsysp != END_OF_LIST(&shipp->subsys_list); subsysp = GET_NEXT(subsysp) ) {
                                        int subsys_type;

                                        val = subsystem_percent[n_subsystems] * subsysp->system_info->max_hits / 100.0f;
                                        subsysp->current_hits = val;

                                        // add the value just generated (it was zero'ed above) into the array of generic system types
                                        subsys_type = subsysp->system_info->type;                                       // this is the generic type of subsystem
                                        SDL_assert ( subsys_type < SUBSYSTEM_MAX );
                                        shipp->subsys_info[subsys_type].current_hits += val;
                                        n_subsystems++;
                                }
                        }
                        ship_recalc_subsys_strength( shipp );

                        shipp->weapon_energy = weapon_energy;
                        for(i=0; i<ammo_count; i++){
                                shipp->weapons.secondary_bank_ammo[i] = ammo[i];
                        }

                        // update my threat flags.
                        // temporarily commented out until tested.
                        Net_player->player->threat_flags = threats;
                }
        }

        // get pl
        int pl;
        GET_INT(pl);
        if(Net_player != NULL){
                Net_player->cl_last_pl = pl;
        }

        PACKET_SET_SIZE();
        // note, if we're already paused or unpaused, calling these will have no effect, so it is safe to do so
        if(!popup_active() && !(Net_player->flags & NETINFO_FLAG_RESPAWNING) && !(Net_player->flags & NETINFO_FLAG_LIMBO)){
                if( is_paused ) {
                        multi_pause_pause();
                } else {
                        multi_pause_unpause();
                }
        }
}

void send_countdown_packet(int time)
{
        ubyte data[20];
        char val;
        int packet_size = 0;

        // build the header and add the time
        BUILD_HEADER(COUNTDOWN);
        val = (char)time;
        ADD_DATA(val);

        // if we're the server, we should broadcast to everyone
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){         
                multi_io_send_to_all_reliable(data, packet_size);
        }
        // otherwise we'de better be a host sending to the standalone
        else {
                SDL_assert(Net_player->flags & NETINFO_FLAG_GAME_HOST);
                multi_io_send_reliable(Net_player, data, packet_size);
        }
}

void process_countdown_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        char time;

        // get the time
        GET_DATA(time);
        PACKET_SET_SIZE();

        // if we're not in the post sync data screen, ignore it
        if(gameseq_get_state() != GS_STATE_MULTI_MISSION_SYNC){
                return;
        }

        // if we're the standalone, this should be a -1 telling us to start the countdown
        if(Game_mode & GM_STANDALONE_SERVER){
                SDL_assert((int)time == -1);

                // start the countdown
                multi_sync_start_countdown();
        }
        // otherwise if we're clients, just bash the countdown
        else {          
                Multi_sync_countdown = (int)time;
        }
}

// packets for debriefing information
void send_debrief_info( int stage_count[], int *stages[] )
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size, i, j;
        int i_tmp;

        BUILD_HEADER(DEBRIEF_INFO);

        // add the data for the teams
        for ( i = 0; i < Num_teams; i++ ) {
                int count;

                count = stage_count[i];
                ADD_INT( count );
                for ( j = 0; j < count; j++ ) {
                        i_tmp = stages[i][j];
                        ADD_INT( i_tmp );
                }
        }
        
        multi_io_send_to_all_reliable(data, packet_size);
}

// process a debrief info packet from the server
void process_debrief_info( ubyte *data, header *hinfo )
{
        int offset, i, j;
        int stage_counts[MAX_TEAMS], active_stages[MAX_TEAMS][MAX_DEBRIEF_STAGES], *stages[MAX_TEAMS];
        int i_tmp;

        offset = HEADER_LENGTH;
        for ( i = 0; i < Num_teams; i++ ) {
                int count;

                GET_INT( count );
                stage_counts[i] = count;
                stages[i] = active_stages[i];
                for ( j = 0; j < count; j++ ) {
                        GET_INT(i_tmp);
                        active_stages[i][j] = i_tmp;
                }
        }
        PACKET_SET_SIZE();

        // now that we have the stage data for the debriefing stages, call debrief function with the
        // data so that clients can now see the debriefing stuff.  Do it only for my team.
        SDL_assert( (Net_player->p_info.team >= 0) && (Net_player->p_info.team < Num_teams) );
        debrief_set_multi_clients( stage_counts[Net_player->p_info.team], stages[Net_player->p_info.team] );
}

// sends homing information to all clients.  We only need signature and num_missiles (because of hornets).
// sends homing_object and homing_subsystem to all clients.
void send_homing_weapon_info( int weapon_num )
{
        ubyte data[MAX_PACKET_SIZE];
        char t_subsys;
        int packet_size;
        object *homing_object;
        ushort homing_signature;
        weapon *wp;

        wp = &Weapons[weapon_num];

        // be sure that this weapon object is a homing object.
        if ( !(Weapon_info[wp->weapon_info_index].wi_flags & WIF_HOMING) )
                return;

        // get the homing signature.  If this weapon isn't homing on anything, then sent 0 as the
        // homing signature.
        homing_signature = 0;
        homing_object = wp->homing_object;
        if ( homing_object != NULL ) {
                homing_signature = homing_object->net_signature;

                // get the subsystem index.
                t_subsys = -1;
                if ( (homing_object->type == OBJ_SHIP) && (wp->homing_subsys != NULL) ) {
                        int s_index;

                        s_index = ship_get_index_from_subsys( wp->homing_subsys, OBJ_INDEX(homing_object), 1 );
                        SDL_assert( s_index < CHAR_MAX );                       // better be less than this!!!!
                        t_subsys = (char)s_index;
                }
        }

        BUILD_HEADER(HOMING_WEAPON_UPDATE);
        ADD_USHORT( Objects[wp->objnum].net_signature );
        ADD_USHORT( homing_signature );
        ADD_DATA( t_subsys );
        
        multi_io_send_to_all(data, packet_size);
}

// process a homing weapon info change packet.  multiple_missiles parameter specifies is this
// packet contains information for multiple weapons (like hornets).
void process_homing_weapon_info( ubyte *data, header *hinfo )
{
        int offset;
        ushort weapon_signature, homing_signature;
        char h_subsys;
        object *homing_object, *weapon_objp;
        weapon *wp;

        offset = HEADER_LENGTH;

        // get the data for the packet
        GET_USHORT( weapon_signature );
        GET_USHORT( homing_signature );
        GET_DATA( h_subsys );
        PACKET_SET_SIZE();

        // deal with changing this weapons homing information
        weapon_objp = multi_get_network_object( weapon_signature );
        if ( weapon_objp == NULL ) {
                nprintf(("Network", "Couldn't find weapon object for homing update -- skipping update\n"));
                return;
        }
        SDL_assert( weapon_objp->type == OBJ_WEAPON );
        wp = &Weapons[weapon_objp->instance];

        // be sure that we can find these weapons and 
        homing_object = multi_get_network_object( homing_signature );
        if ( homing_object == NULL ) {
                nprintf(("Network", "Couldn't find homing object for homing update\n"));
                return;
        }

        if ( homing_object->type == OBJ_WEAPON ) {
                SDL_assert(Weapon_info[Weapons[homing_object->instance].weapon_info_index].wi_flags & WIF_BOMB);
        }

        wp->homing_object = homing_object;
        wp->homing_subsys = NULL;
        wp->target_num = OBJ_INDEX(homing_object);
        wp->target_sig = homing_object->signature;
        if ( h_subsys != -1 ) {
                SDL_assert( homing_object->type == OBJ_SHIP );
                wp->homing_subsys = ship_get_indexed_subsys( &Ships[homing_object->instance], h_subsys);
        }

        if ( homing_object->type == OBJ_SHIP ) {
                nprintf(("Network", "Updating homing information for weapon -- homing on %s\n", Ships[homing_object->instance].ship_name));
        }
}

void send_emp_effect(ushort net_sig, float intensity, float time)
{
        ubyte data[25];
        int packet_size;

        SDL_assert(MULTIPLAYER_MASTER);

        // build the packet and add the opcode
        BUILD_HEADER(EMP_EFFECT);
        ADD_USHORT(net_sig);
        ADD_FLOAT(intensity);
        ADD_FLOAT(time);

        // send it to the player                
        multi_io_send_to_all(data, packet_size);
}

void process_emp_effect(ubyte *data, header *hinfo)
{
        float intensity, time;
        ushort net_sig;
        object *objp;
        int offset = HEADER_LENGTH;

        // read in the EMP effect data
        GET_USHORT(net_sig);
        GET_FLOAT(intensity);
        GET_FLOAT(time);
        PACKET_SET_SIZE();

        // try and find the object
        objp = multi_get_network_object(net_sig);
        if((objp != NULL) && (objp->type == OBJ_SHIP)){         
                // if i'm not an observer and I have a valid ship, play the EMP effect
                if(!(Net_player->flags & NETINFO_FLAG_OBSERVER) && (Player_obj != NULL) && (Player_obj->type == OBJ_SHIP) && (Player_obj == objp)){
                        emp_start_local(intensity, time);
                }

                // start the effect for the ship itself
                emp_start_ship(objp, intensity, time);
        }
}

// tells whether or not reinforcements are available
void send_reinforcement_avail( int rnum )
{
        ubyte data[25];
        int packet_size;

        BUILD_HEADER(REINFORCEMENT_AVAIL);
        ADD_INT( rnum );        
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_reinforcement_avail( ubyte *data, header *hinfo )
{
        int offset;
        int rnum;

        offset = HEADER_LENGTH;
        GET_INT( rnum );
        PACKET_SET_SIZE();

        // sanity check for a valid reinforcement number
        if ( (rnum >= 0) && (rnum < Num_reinforcements) ) {
                Reinforcements[rnum].flags |= RF_IS_AVAILABLE;
        }
}

void send_change_iff_packet(ushort net_signature, int new_team)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        if(Net_player == NULL){
                return;
        }
        if(!(Net_player->flags & NETINFO_FLAG_AM_MASTER)){
                return;
        }

        // build the packet and add the data
        BUILD_HEADER(CHANGE_IFF);
        ADD_USHORT(net_signature);
        ADD_INT(new_team);

        // send to all players  
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_change_iff_packet( ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        ushort net_signature;
        int new_team;   
        object *objp;

        // get the data
        GET_USHORT(net_signature);
        GET_INT(new_team);
        PACKET_SET_SIZE();

        // lookup the object
        objp = multi_get_network_object(net_signature);
        if((objp != NULL) && (objp->type == OBJ_SHIP) && (objp->instance >=0)){
                Ships[objp->instance].team = new_team;
        }       
}

void send_NEW_primary_fired_packet(ship *shipp, int banks_fired)
{
        int packet_size, objnum;
        ubyte data[MAX_PACKET_SIZE]; // ubanks_fired, current_bank;
        object *objp;   
        int np_index;
        net_player *ignore = NULL;

        // sanity checking for now
        SDL_assert ( banks_fired <= 3 );

        // get an object pointer for this ship.
        objnum = shipp->objnum;
        objp = &Objects[objnum];

        // if i'm a multiplayer client, I should never send primary fired packets for anyone except me
        if(MULTIPLAYER_CLIENT && (Player_obj != objp)){
                return;
        }

        // just in case nothing got fired
        if(banks_fired <= 0){
                return;
        }

        // ubanks_fired = (ubyte)banks_fired;
        // current_bank = (ubyte)shipp->weapons.current_primary_bank;
        // SDL_assert( current_bank <= 3 );

        // insert the current primary bank into this byte
        // ubanks_fired |= (current_bank << CURRENT_BANK_BIT);

        // append the SF_PRIMARY_LINKED flag on the top nibble of the banks_fired
        // if ( shipp->flags & SF_PRIMARY_LINKED ){
                // ubanks_fired |= (1<<7);
        // }    

        // determine if its a player ship and don't send to him if we're in "client firing" mode
        // if((Netgame.debug_flags & NETD_FLAG_CLIENT_FIRING) && MULTIPLAYER_MASTER){
        if(MULTIPLAYER_MASTER){
                np_index = multi_find_player_by_net_signature(objp->net_signature);
                if((np_index >= 0) && (np_index < MAX_PLAYERS)){
                        ignore = &Net_players[np_index];
                }
        }

        // build up the standard weapon fired packet.  This packet will get sent to all players if an AI
        // ship fired the primary weapons.  If a player fired the weaspon, then this packet will get sent
        // to every player but the guy who actullly fired the weapon.  This method is used to help keep client
        // and server in sync w.r.t. weapon energy for player ship
        BUILD_HEADER( PRIMARY_FIRED_NEW );
        ADD_USHORT(objp->net_signature);
        // ADD_DATA(ubanks_fired);

        // if I'm a server, broadcast to all players
        if(MULTIPLAYER_MASTER){         
                multi_io_send_to_all(data, packet_size, ignore);

                // TEST CODE
                multi_rate_add(1, "wfi", packet_size);
        }
        // otherwise just send to the server
        else {
                multi_io_send(Net_player, data, packet_size);           
        }
}

void process_NEW_primary_fired_packet(ubyte *data, header *hinfo)
{
        int offset; // linked;  
        // ubyte banks_fired, current_bank;
        object* objp;   
//      ship *shipp;
        ushort shooter_sig;     

        // read all packet info
        offset = HEADER_LENGTH;
        GET_USHORT(shooter_sig);
        // GET_DATA(banks_fired);
        PACKET_SET_SIZE();

        // find the object this fired packet is operating on
        objp = multi_get_network_object( shooter_sig );
        if ( objp == NULL ) {
                nprintf(("Network", "Could not find ship for fire primary packet NEW!"));
                return;
        }
        // if this object is not actually a valid ship, don't do anything
        if(objp->type != OBJ_SHIP){
                return;
        }
        if(objp->instance < 0){
                return;
        }
//      shipp = &Ships[objp->instance];
        
        // get the link status of the primary banks
        // linked = 0;
        // if ( banks_fired & (1<<7) ) {
                // linked = 1;
                // banks_fired ^= (1<<7);
        // }

        // get the current primary bank
        // current_bank = (ubyte)(banks_fired >> CURRENT_BANK_BIT);
        // current_bank &= 0x3;
        // SDL_assert( (current_bank >= 0) && (current_bank < MAX_PRIMARY_BANKS) );
        // shipp->weapons.current_primary_bank = current_bank;

        // strip off all remaining bits and just keep which banks were actually fired.
        // banks_fired &= 0x3;
        
        // set the link status of the ship if not the player.  If it is the player, we will do sanity checking
        // only (for now).      
        // if ( !linked ){
//              shipp->flags &= ~SF_PRIMARY_LINKED;
        // } else {
                // shipp->flags |= SF_PRIMARY_LINKED;
        // }

        // if we're in client firing mode, ignore ones for myself       
        if((Player_obj != NULL) && (Player_obj == objp)){               
                return;
        }
                
        ship_fire_primary( objp, 0, 1 );
}

void send_NEW_countermeasure_fired_packet(object *objp, int cmeasure_count, int rand_val)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size;
        int np_index;   
        net_player *ignore = NULL;

        // if i'm a multiplayer client, I should never send primary fired packets for anyone except me
        if(MULTIPLAYER_CLIENT && (Player_obj != objp)){
                return;
        }

        SDL_assert ( cmeasure_count < UCHAR_MAX );
        BUILD_HEADER(COUNTERMEASURE_NEW);
        ADD_USHORT( objp->net_signature );
        ADD_INT( rand_val );

        nprintf(("Network","Sending NEW countermeasure packet!\n"));

        // determine if its a player ship and don't send to him if we're in "client firing" mode
        // if((Netgame.debug_flags & NETD_FLAG_CLIENT_FIRING) && MULTIPLAYER_MASTER){
        if(MULTIPLAYER_MASTER){
                np_index = multi_find_player_by_net_signature(objp->net_signature);
                if((np_index >= 0) && (np_index < MAX_PLAYERS)){
                        ignore = &Net_players[np_index];
                }
        }
        
        // if I'm the server, send to all players
        if(MULTIPLAYER_MASTER){                 
                multi_io_send_to_all(data, packet_size, ignore);
        } 
        // otherwise send to the server
        else {
                multi_io_send(Net_player, data, packet_size);
        }
}

void process_NEW_countermeasure_fired_packet(ubyte *data, header *hinfo)
{
        int offset;
        ushort signature;
        int rand_val;
        object *objp;   

        offset = HEADER_LENGTH;
        GET_USHORT( signature );
        GET_INT( rand_val );
        PACKET_SET_SIZE();

        objp = multi_get_network_object( signature );
        if ( objp == NULL ) {
                nprintf(("network", "Could find object whose countermeasures are being launched!!!\n"));
                return;
        }
        if(objp->type != OBJ_SHIP){
                return;
        }       

        // if we're in client firing mode, ignore ones for myself
        // if((Netgame.debug_flags & NETD_FLAG_CLIENT_FIRING) && (Player_obj != NULL) && (Player_obj == objp)){         
        if((Player_obj != NULL) && (Player_obj == objp)){               
                return;
        }
                
        // make it so ship can fire right away!
        Ships[objp->instance].cmeasure_fire_stamp = timestamp(0);
        if ( objp == Player_obj ){              
                nprintf(("network", "firing countermeasure from my ship\n"));
        }
        ship_launch_countermeasure( objp, rand_val );                   
}

void send_beam_fired_packet(object *shooter, ship_subsys *turret, object *target, int beam_info_index, beam_info *override)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;    
        ubyte u_beam_info;
        char subsys_index;
        beam_info b_info;

        // only the server should ever be doing this
        SDL_assert(MULTIPLAYER_MASTER);

        // setup outgoing data
        SDL_assert(shooter != NULL);
        SDL_assert(turret != NULL);
        SDL_assert(target != NULL);
        SDL_assert(override != NULL);
        if((shooter == NULL) || (turret == NULL) || (target == NULL) || (override == NULL)){
                return;
        }
        u_beam_info = (ubyte)beam_info_index;
        subsys_index = (char)ship_get_index_from_subsys(turret, OBJ_INDEX(shooter));
        SDL_assert(subsys_index >= 0);
        if(subsys_index < 0){
                return;
        }

        // swap the beam_info override info into little endian byte order
        b_info.dir_a.xyz.x = INTEL_FLOAT(override->dir_a.xyz.x);
        b_info.dir_a.xyz.y = INTEL_FLOAT(override->dir_a.xyz.y);
        b_info.dir_a.xyz.z = INTEL_FLOAT(override->dir_a.xyz.z);
         
        b_info.dir_b.xyz.x = INTEL_FLOAT(override->dir_b.xyz.x);
        b_info.dir_b.xyz.y = INTEL_FLOAT(override->dir_b.xyz.y);
        b_info.dir_b.xyz.z = INTEL_FLOAT(override->dir_b.xyz.z);
         
        b_info.delta_ang = INTEL_FLOAT(override->delta_ang);
        b_info.shot_count = override->shot_count;
         
        for (int i = 0; i < b_info.shot_count; i++) {
                b_info.shot_aim[i] = INTEL_FLOAT(override->shot_aim[i]);
        }

        // build the header
        BUILD_HEADER(BEAM_FIRED);
        ADD_USHORT(shooter->net_signature);
        ADD_DATA(subsys_index);
        ADD_USHORT(target->net_signature);
        ADD_DATA(u_beam_info);
        ADD_DATA(b_info);  // FIXME: This is still wrong, we shouldn't be sending an entire struct over the wire - taylor

        // send to all clients  
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_beam_fired_packet(ubyte *data, header *hinfo)
{
        int i,offset;
        ushort shooter_sig, target_sig;
        char subsys_index;
        ubyte u_beam_info;
        beam_info b_info;
        beam_fire_info fire_info;

        // only clients should ever get this
        SDL_assert(MULTIPLAYER_CLIENT);

        // read in packet data
        offset = HEADER_LENGTH;
        GET_USHORT(shooter_sig);
        GET_DATA(subsys_index);
        GET_USHORT(target_sig);
        GET_DATA(u_beam_info);
        GET_DATA(b_info);

        PACKET_SET_SIZE();

        // swap the beam_info override info into native byte order
        b_info.dir_a.xyz.x = INTEL_FLOAT( b_info.dir_a.xyz.x );
        b_info.dir_a.xyz.y = INTEL_FLOAT( b_info.dir_a.xyz.y );
        b_info.dir_a.xyz.z = INTEL_FLOAT( b_info.dir_a.xyz.z );
        b_info.dir_b.xyz.x = INTEL_FLOAT( b_info.dir_b.xyz.x );
        b_info.dir_b.xyz.y = INTEL_FLOAT( b_info.dir_b.xyz.y );
        b_info.dir_b.xyz.z = INTEL_FLOAT( b_info.dir_b.xyz.z );
        b_info.delta_ang = INTEL_FLOAT( b_info.delta_ang );

        for (i = 0; i < MAX_BEAM_SHOTS; i++) {
                b_info.shot_aim[i] = INTEL_FLOAT(b_info.shot_aim[i]);
        }

        // lookup all relevant data
        fire_info.beam_info_index = (int)u_beam_info;
        fire_info.shooter = NULL;
        fire_info.target = NULL;
        fire_info.turret = NULL;
        fire_info.target_subsys = NULL;
        fire_info.beam_info_override = NULL;            
        fire_info.shooter = multi_get_network_object(shooter_sig);
        fire_info.target = multi_get_network_object(target_sig);
        fire_info.beam_info_override = &b_info;
        fire_info.accuracy = 1.0f;
        if((fire_info.shooter == NULL) || (fire_info.shooter->type != OBJ_SHIP) || (fire_info.shooter->instance < 0) || (fire_info.shooter->instance > MAX_SHIPS) || (fire_info.target == NULL)){
                nprintf(("Network", "Couldn't get shooter/target info for BEAM weapon!\n"));
                return;
        }
        fire_info.turret = ship_get_indexed_subsys( &Ships[fire_info.shooter->instance], (int)subsys_index);
        if(fire_info.turret == NULL){
                nprintf(("Network", "Couldn't get turret for BEAM weapon!\n"));
                return;
        }

        // fire da beam
        beam_fire(&fire_info);
}

void send_sw_query_packet(ubyte code, char *txt)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        // build the packet and add the code
        BUILD_HEADER(SW_STD_QUERY);
        ADD_DATA(code);
        if((code == SW_STD_START) || (code == SW_STD_BAD)){             
                ADD_STRING(txt);
        }

        // if I'm the host, send to standalone
        if(MULTIPLAYER_HOST){
                SDL_assert(!MULTIPLAYER_MASTER);
                SDL_assert(code == SW_STD_START);               
                multi_io_send_reliable(Net_player, data, packet_size);
        }
        // otherwise standalone sends back to host
        else {
                SDL_assert(Game_mode & GM_STANDALONE_SERVER);
                SDL_assert(code != SW_STD_START);
                SDL_assert(Netgame.host != NULL);
                if(Netgame.host != NULL){                       
                        multi_io_send_reliable(Netgame.host, data, packet_size);
                }
        }
}

void process_sw_query_packet(ubyte *data, header *hinfo)
{       
}

void send_event_update_packet(int event)
{
        ubyte data[MAX_PACKET_SIZE];
        ushort u_event = (ushort)event;
        int packet_size = 0;

        // build the header and add the event
        BUILD_HEADER(EVENT_UPDATE);
        ADD_USHORT(u_event);
        ADD_INT(Mission_events[event].flags);
        ADD_INT(Mission_events[event].formula);
        ADD_INT(Mission_events[event].result);
        ADD_INT(Mission_events[event].count);

        // send to all players  
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_event_update_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        int store_flags;
        ushort u_event;
        
        // get the data
        GET_USHORT(u_event);
        store_flags = Mission_events[u_event].flags;
        GET_INT(Mission_events[u_event].flags);
        GET_INT(Mission_events[u_event].formula);
        GET_INT(Mission_events[u_event].result);
        GET_INT(Mission_events[u_event].count);
        PACKET_SET_SIZE();

        // went from non directive special to directive special
        if(!(store_flags & MEF_DIRECTIVE_SPECIAL) && (Mission_events[u_event].flags & MEF_DIRECTIVE_SPECIAL)){
                mission_event_set_directive_special(u_event);
        }
        // if we went directive special to non directive special
        else if((store_flags & MEF_DIRECTIVE_SPECIAL) & !(Mission_events[u_event].flags & MEF_DIRECTIVE_SPECIAL)){
                mission_event_unset_directive_special(u_event);
        }       
}

// weapon detonate packet
void send_weapon_detonate_packet(object *objp)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        // sanity checks
        SDL_assert(MULTIPLAYER_MASTER);
        if(!MULTIPLAYER_MASTER){
                return;
        }
        SDL_assert(objp != NULL);
        if(objp == NULL){
                return;
        }

        // build the header and add the data
        BUILD_HEADER(WEAPON_DET);
        ADD_USHORT(objp->net_signature);

        // send to all players
        multi_io_send_to_all(data, packet_size);
}

void process_weapon_detonate_packet(ubyte *data, header *hinfo)
{
        ushort net_sig;
        int offset = HEADER_LENGTH;
        object *objp = NULL;

        // get the weapon signature
        GET_USHORT(net_sig);
        PACKET_SET_SIZE();

        // lookup the weapon
        objp = multi_get_network_object(net_sig);
        if((objp != NULL) && (objp->type == OBJ_WEAPON) && (objp->instance >= 0)){
                weapon_detonate(objp);
        }
}       

// flak fired packet
void send_flak_fired_packet(int ship_objnum, int subsys_index, int weapon_objnum, float flak_range)
{
        int packet_size;
        ushort pnet_signature;
        ubyte data[MAX_PACKET_SIZE], cindex;
        object *objp;   
        ship_subsys *ssp;
        short val;

        // sanity
        if((weapon_objnum < 0) || (Objects[weapon_objnum].type != OBJ_WEAPON) || (Objects[weapon_objnum].instance < 0) || (Weapons[Objects[weapon_objnum].instance].weapon_info_index < 0)){
                return;
        }

        // local setup -- be sure we are actually passing a weapon!!!!
        objp = &Objects[weapon_objnum];
        SDL_assert ( objp->type == OBJ_WEAPON );        
        pnet_signature = Objects[ship_objnum].net_signature;

        SDL_assert( subsys_index < UCHAR_MAX );
        cindex = (ubyte)subsys_index;

        ssp = ship_get_indexed_subsys( &Ships[Objects[ship_objnum].instance], subsys_index, NULL );
        if(ssp == NULL){
                return;
        }

        // build the fire turret packet.  
        BUILD_HEADER(FLAK_FIRED);       
        packet_size += multi_pack_unpack_position(1, data + packet_size, &objp->orient.v.fvec);
        ADD_USHORT( pnet_signature );           
        ADD_DATA( cindex );
        val = (short)ssp->submodel_info_1.angs.h;
        ADD_SHORT( val );
        val = (short)ssp->submodel_info_2.angs.p;
        ADD_SHORT( val );       
        ADD_FLOAT( flak_range );
        
        multi_io_send_to_all(data, packet_size);

        multi_rate_add(1, "flk", packet_size);
}

void process_flak_fired_packet(ubyte *data, header *hinfo)
{
        int offset, weapon_objnum, wid;
        ushort pnet_signature;
        vector pos, dir;
        matrix orient;
        vector o_fvec;
        ubyte turret_index;
        object *objp;
        ship_subsys *ssp;       
        ship *shipp;
        short pitch, heading;
        float flak_range;

        // get the data for the turret fired packet
        offset = HEADER_LENGTH;         
        offset += multi_pack_unpack_position(0, data + offset, &o_fvec);
        GET_USHORT( pnet_signature );
        GET_DATA( turret_index );
        GET_SHORT( heading );
        GET_SHORT( pitch );     
        GET_FLOAT( flak_range );
        PACKET_SET_SIZE();                              // move our counter forward the number of bytes we have read

        // find the object
        objp = multi_get_network_object( pnet_signature );
        if ( objp == NULL ) {
                nprintf(("network", "could find parent object with net signature %d for flak firing\n", pnet_signature));
                return;
        }

        // if this isn't a ship, do nothing
        if ( objp->type != OBJ_SHIP ){
                return;
        }

        // make an orientation matrix from the o_fvec
        vm_vector_2_matrix(&orient, &o_fvec, NULL, NULL);

        // find this turret, and set the position of the turret that just fired to be where it fired.  Quite a
        // hack, but should be suitable.
        shipp = &Ships[objp->instance];
        ssp = ship_get_indexed_subsys( shipp, turret_index, NULL );
        if(ssp == NULL){
                return;
        }
        wid = ssp->system_info->turret_weapon_type;
        if((wid < 0) || !(Weapon_info[wid].wi_flags & WIF_FLAK)){
                return;
        }

        // bash the position and orientation of the turret
        ssp->submodel_info_1.angs.h = (float)heading;
        ssp->submodel_info_2.angs.p = (float)pitch;

        // get the world position of the weapon
        ship_get_global_turret_info(objp, ssp->system_info, &pos, &dir);

        // create the weapon object     
        weapon_objnum = weapon_create( &pos, &orient, wid, OBJ_INDEX(objp), 0, -1, 1);
        if (weapon_objnum != -1) {
                if ( Weapon_info[wid].launch_snd != -1 ) {
                        snd_play_3d( &Snds[Weapon_info[wid].launch_snd], &pos, &View_position );
                }

                // create a muzzle flash from a flak gun based upon firing position and weapon type
                flak_muzzle_flash(&pos, &dir, wid);

                // set its range explicitly - make it long enough so that it's guaranteed to still exist when the server tells us it blew up
                flak_set_range(&Objects[weapon_objnum], &pos, (float)flak_range);
        }
}

#define ADD_NORM_VEC(d) do { SDL_assert((packet_size + 3) < MAX_PACKET_SIZE); char vnorm[3] = { (char)(d.x * 127.0f), (char)(d.y * 127.0f), (char)(d.z * 127.0f) }; memcpy(data + packet_size, vnorm, 3); packet_size += 3; } while(0);
#define GET_NORM_VEC(d) do { char vnorm[3]; memcpy(vnorm, data+offset, 3); d.x = (float)vnorm[0] / 127.0f; d.y = (float)vnorm[1] / 127.0f; d.z = (float)vnorm[2] / 127.0f; } while(0);

// player pain packet
void send_player_pain_packet(net_player *pl, int weapon_info_index, float damage, vector *force, vector *hitpos)
{
        ubyte data[MAX_PACKET_SIZE];
        ubyte windex;
        ushort udamage;
        int packet_size = 0;

        SDL_assert(MULTIPLAYER_MASTER);
        if(!MULTIPLAYER_MASTER){
                return;
        }
        SDL_assert(pl != NULL);
        if(pl == NULL){
                return;
        }

        // build the packet and add the code
        BUILD_HEADER(NETPLAYER_PAIN);
        windex = (ubyte)weapon_info_index;
        ADD_DATA(windex);
        udamage = (ushort)damage;
        ADD_USHORT(udamage);
        //ADD_DATA((*force));
        add_vector_data( data, &packet_size, *force );
        //ADD_DATA((*hitpos));
        add_vector_data( data, &packet_size, *hitpos );

        // send to the player
        multi_io_send(pl, data, packet_size);

        multi_rate_add(1, "pai", packet_size);
}       

void process_player_pain_packet(ubyte *data, header *hinfo)
{
        int offset;
        ubyte windex;
        ushort udamage;
        vector force = ZERO_VECTOR;
        vector local_hit_pos = ZERO_VECTOR;
        weapon_info *wip;

        // get the data for the pain packet
        offset = HEADER_LENGTH;         
        GET_DATA(windex);
        GET_USHORT(udamage);
        //GET_DATA(force);
        get_vector_data( data, &offset, force );
        //GET_DATA(local_hit_pos);
        get_vector_data( data, &offset, local_hit_pos );
        PACKET_SET_SIZE();

        mprintf(("PAIN!\n"));

        // get weapon info pointer
        //SDL_assert((windex >= 0) && (windex < Num_weapon_types) && (Weapon_info[windex].subtype == WP_LASER));        // always true
        if(! ((windex != 255) && (windex < Num_weapon_types) && (Weapon_info[windex].subtype == WP_LASER)) ){
                return;
        }
        wip = &Weapon_info[windex];

        // play the weapon hit sound
        SDL_assert(Player_obj != NULL);
        if(Player_obj == NULL){
                return;
        }
        weapon_hit_do_sound(Player_obj, wip, &Player_obj->pos);

        // we need to do 3 things here. player pain (game flash), weapon hit sound, ship_apply_whack()
        ship_hit_pain((float)udamage);

        // apply the whack      
        ship_apply_whack(&force, &local_hit_pos, Player_obj);   
}

// lightning packet
void send_lightning_packet(int bolt_type, vector *start, vector *strike)
{
        ubyte data[MAX_PACKET_SIZE];
        char val;
        int packet_size = 0;

        // build the header and add the data
        BUILD_HEADER(LIGHTNING_PACKET);
        val = (char)bolt_type;
        ADD_DATA(val);
        //ADD_DATA((*start));
        add_vector_data( data, &packet_size, *start );
        //ADD_DATA((*strike));
        add_vector_data( data, &packet_size, *strike );

        // send to everyone unreliable for now
        multi_io_send_to_all(data, packet_size);
}

void process_lightning_packet(ubyte *data, header *hinfo)
{
        int offset;
        char bolt_type;
        vector start = ZERO_VECTOR, strike = ZERO_VECTOR;

        // read the data
        offset = HEADER_LENGTH;
        GET_DATA(bolt_type);
//      GET_DATA(start);
        get_vector_data(data, &offset, start);
//      GET_DATA(strike);
        get_vector_data(data, &offset, strike);
        PACKET_SET_SIZE();

        // invalid bolt?
        if(bolt_type < 0){
                return;
        }

        // fire it up
        nebl_bolt(bolt_type, &start, &strike);
}

void send_bytes_recvd_packet(net_player *pl)
{
        // only clients should ever be doing this
        if(pl == NULL){
                return;
        }       

        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;
        BUILD_HEADER(BYTES_SENT);
        ADD_INT(pl->cl_bytes_recvd);

        // send to the server
        multi_io_send_reliable(pl, data, packet_size);
}

void process_bytes_recvd_packet(ubyte *data, header *hinfo)
{
        int bytes;
        int pid;
        net_player *pl = NULL;
        int offset = HEADER_LENGTH;
        
        GET_INT(bytes);
        PACKET_SET_SIZE();

        // not server?
        if(Net_player == NULL){
                return;
        }
        if(!MULTIPLAYER_MASTER){
                return;
        }

        // make sure we know what player sent this
        pid = find_player_id(hinfo->id);
        if((pid < 0) || (pid >= MAX_PLAYERS)){
                return;
        }
        pl = &Net_players[pid];

        // compute his pl
        pl->cl_bytes_recvd = bytes;
        if(bytes < 0){
                return;
        }
        pl->sv_last_pl = (int)(100.0f * (1.0f - ((float)pl->cl_bytes_recvd / (float)pl->sv_bytes_sent)));

        // reset bytes sent
        pl->sv_bytes_sent = 0;
}

// host transfer
void send_host_captain_change_packet(short player_id, int captain_change)
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        // build the packet
        BUILD_HEADER(TRANSFER_HOST);
        ADD_SHORT(player_id);
        ADD_INT(captain_change);

        // send to all
        multi_io_send_to_all_reliable(data, packet_size);
}

void process_host_captain_change_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        int idx, found_player, captain_change;
        short player_id;

        // get the player id
        GET_SHORT(player_id);
        GET_INT(captain_change);
        PACKET_SET_SIZE();

        // captain change
        if(captain_change){
                // flag the new guy             
                for(idx=0; idx<MAX_PLAYERS; idx++){
                        if(MULTI_CONNECTED(Net_players[idx]) && (Net_players[idx].player_id == player_id)){
                                HUD_printf("%s is the new captain of team %d", Net_players[idx].player->callsign, Net_players[idx].p_info.team + 1);
                                break;
                        }
                }
        } else {
                // unflag all old players
                for(idx=0; idx<MAX_PLAYERS; idx++){
                        Net_players[idx].flags &= ~NETINFO_FLAG_GAME_HOST;
                }

                // flag the new guy
                found_player = 0;
                for(idx=0; idx<MAX_PLAYERS; idx++){
                        if(MULTI_CONNECTED(Net_players[idx]) && (Net_players[idx].player_id == player_id)){
                                Net_players[idx].flags |= NETINFO_FLAG_GAME_HOST;

                                // spew to the HUD config
                                if(Net_players[idx].player != NULL){
                                        HUD_printf("%s is the new game host", Net_players[idx].player->callsign);
                                }

                                found_player = 1;
                                break;
                        }
                }

                // doh
                if(!found_player){
                        multi_quit_game(PROMPT_NONE, MULTI_END_NOTIFY_NONE, MULTI_END_ERROR_HOST_LEFT);
                }
        }       
}

void send_self_destruct_packet()
{
        ubyte data[MAX_PACKET_SIZE];
        int packet_size = 0;

        // bogus
        if(Net_player == NULL){
                return;
        }

        // if i'm the server, I shouldn't be here
        SDL_assert(!(Net_player->flags & NETINFO_FLAG_AM_MASTER));
        if(Net_player->flags & NETINFO_FLAG_AM_MASTER){
                return;
        }
        
        // only if this is valid
        if(MULTI_OBSERVER(Net_players[MY_NET_PLAYER_NUM])){
                return;
        }

        // bogus object?
        if((Player_ship == NULL) || (Player_obj == NULL)){
                return;
        }

        // self destruct
        BUILD_HEADER(SELF_DESTRUCT);
        ADD_USHORT(Player_obj->net_signature);

        // send to the server
        multi_io_send_reliable(Net_player, data, packet_size);
}

void process_self_destruct_packet(ubyte *data, header *hinfo)
{
        int offset = HEADER_LENGTH;
        ushort net_sig;
        int np_index;

        // get the net signature
        GET_USHORT(net_sig);
        PACKET_SET_SIZE();

        // get the player
        np_index = find_player_id(hinfo->id);
        if(np_index < 0){
                return;
        }
        if(MULTI_OBSERVER(Net_players[np_index])){
                return;
        }
        if(Net_players[np_index].player == NULL){
                return;
        }
        if((Net_players[np_index].player->objnum < 0) || (Net_players[np_index].player->objnum >= MAX_OBJECTS)){
                return;
        }
        if(Objects[Net_players[np_index].player->objnum].net_signature != net_sig){
                return;
        }
        if(Objects[Net_players[np_index].player->objnum].type != OBJ_SHIP){
                return;
        }
        if((Objects[Net_players[np_index].player->objnum].instance < 0) || (Objects[Net_players[np_index].player->objnum].instance >= MAX_SHIPS)){
                return;
        }

        // do eet
        ship_self_destruct(&Objects[Net_players[np_index].player->objnum]);
}