rendering functions mostly done; more complete shader setup

[taylor/freespace2.git] / include / multi.h

/*
 * 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/Multi.h $
 * $Revision$
 * $Date$
 * $Author$
 *
 * Header file which contains type definitions for multiplayer, and support for high-level
 * multiplayer functions.
 *
 * $Log$
 * Revision 1.5  2003/05/25 02:30:42  taylor
 * Freespace 1 support
 *
 * Revision 1.4  2002/06/09 04:41:14  relnev
 * added copyright header
 *
 * Revision 1.3  2002/06/02 06:02:59  relnev
 * tcp.cfg namefix
 *
 * Revision 1.2  2002/05/26 21:27:53  theoddone33
 * More progress (I hate psnet2)
 *
 * Revision 1.1.1.1  2002/05/03 03:28:12  root
 * Initial import.
 *
 * 
 * 47    8/30/99 5:01p Dave
 * Made d3d do less state changing in the nebula. Use new chat server for
 * PXO.
 * 
 * 46    8/26/99 8:51p Dave
 * Gave multiplayer TvT messaging a heavy dose of sanity. Cheat codes.
 * 
 * 45    8/24/99 10:11a Dave
 * New server version.
 * 
 * 44    8/24/99 1:49a 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.
 * 
 * 43    8/22/99 5:53p Dave
 * Scoring fixes. Added self destruct key. Put callsigns in the logfile
 * instead of ship designations for multiplayer players.
 * 
 * 42    8/22/99 1:19p Dave
 * Fixed up http proxy code. Cleaned up scoring code. Reverse the order in
 * which d3d cards are detected.
 * 
 * 41    8/19/99 10:59a Dave
 * Packet loss detection.
 * 
 * 40    8/04/99 2:24a Dave
 * Fixed escort gauge ordering for dogfight.
 * 
 * 39    7/30/99 7:01p Dave
 * Dogfight escort gauge. Fixed up laser rendering in Glide.
 * 
 * 38    7/26/99 5:50p Dave
 * Revised ingame join. Better? We'll see....
 * 
 * 37    7/22/99 7:17p Dave
 * Fixed excessive whacks in multiplayer.
 * 
 * 36    7/08/99 10:53a Dave
 * New multiplayer interpolation scheme. Not 100% done yet, but still
 * better than the old way.
 * 
 * 35    7/03/99 5:50p Dave
 * Make rotated bitmaps draw properly in padlock views.
 * 
 * 34    6/07/99 9:51p Dave
 * Consolidated all multiplayer ports into one.
 * 
 * 33    5/17/99 9:32a Dave
 * Bumped up server version.
 * 
 * 32    5/14/99 1:59p Andsager
 * Multiplayer message for subsystem cargo revealed.
 * 
 * 31    4/29/99 3:02p Dave
 * 
 * 30    4/29/99 2:29p Dave
 * Made flak work much better in multiplayer.
 * 
 * 29    4/28/99 11:13p Dave
 * Temporary checkin of artillery code.
 * 
 * 28    4/25/99 7:43p Dave
 * Misc small bug fixes. Made sun draw properly.
 * 
 * 27    4/21/99 6:15p Dave
 * Did some serious housecleaning in the beam code. Made it ready to go
 * for anti-fighter "pulse" weapons. Fixed collision pair creation. Added
 * a handy macro for recalculating collision pairs for a given object.
 * 
 * 26    4/09/99 2:21p Dave
 * Multiplayer beta stuff. CD checking.
 * 
 * 25    3/10/99 6:50p Dave
 * Changed the way we buffer packets for all clients. Optimized turret
 * fired packets. Did some weapon firing optimizations.
 * 
 * 24    3/08/99 7:03p Dave
 * First run of new object update system. Looks very promising.
 * 
 * 23    3/01/99 7:39p Dave
 * Added prioritizing ship respawns. Also fixed respawns in TvT so teams
 * don't mix respawn points.
 * 
 * 22    2/25/99 4:19p Dave
 * Added multiplayer_beta defines. Added cd_check define. Fixed a few
 * release build warnings. Added more data to the squad war request and
 * response packets.
 * 
 * 21    2/23/99 2:29p Dave
 * First run of oldschool dogfight mode. 
 * 
 * 20    2/19/99 11:42a Dave
 * Put in model rendering autocentering.
 * 
 * 19    2/17/99 2:10p Dave
 * First full run of squad war. All freespace and tracker side stuff
 * works.
 * 
 * 18    2/12/99 6:16p Dave
 * Pre-mission Squad War code is 95% done.
 * 
 * 17    2/11/99 3:08p Dave
 * PXO refresh button. Very preliminary squad war support.
 * 
 * 16    2/08/99 5:07p Dave
 * FS2 chat server support. FS2 specific validated missions.
 * 
 * 15    1/29/99 2:08a Dave
 * Fixed beam weapon collisions with players. Reduced size of scoring
 * struct for multiplayer. Disabled PXO.
 * 
 * 14    1/14/99 12:48a Dave
 * Todo list bug fixes. Made a pass at putting briefing icons back into
 * FRED. Sort of works :(
 * 
 * 13    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.
 * 
 * 12    1/12/99 4:07a Dave
 * Put in barracks code support for selecting squad logos. Properly
 * distribute squad logos in a multiplayer game.
 * 
 * 11    12/14/98 12:13p Dave
 * Spiffed up xfer system a bit. Put in support for squad logo file xfer.
 * Need to test now.
 * 
 * 10    12/03/98 5:22p Dave
 * Ported over Freespace 1 multiplayer ships.tbl and weapons.tbl
 * checksumming.
 * 
 * 9     11/19/98 4:19p Dave
 * Put IPX sockets back in psnet. Consolidated all multiplayer config
 * files into one.
 * 
 * 8     11/19/98 8:03a Dave
 * Full support for D3-style reliable sockets. Revamped packet lag/loss
 * system, made it receiver side and at the lowest possible level.
 * 
 * 7     11/17/98 11:12a Dave
 * Removed player identification by address. Now assign explicit id #'s.
 * 
 * 6     11/12/98 12:13a Dave
 * Tidied code up for multiplayer test. Put in network support for flak
 * guns.
 * 
 * 5     11/05/98 5:55p Dave
 * Big pass at reducing #includes
 * 
 * 4     10/19/98 11:15a Dave
 * Changed requirements for stats storing in PXO mode.
 * 
 * 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
 * 
 * 257   9/20/98 7:19p Dave
 * Added CHANGE_IFF packet. 
 * 
 * 256   9/16/98 6:54p Dave
 * Upped  max sexpression nodes to 1800 (from 1600). Changed FRED to sort
 * the ship list box. Added code so that tracker stats are not stored with
 * only 1 player.
 * 
 * 255   9/15/98 7:24p Dave
 * Minor UI changes. Localized bunch of new text.
 * 
 * 254   9/15/98 4:03p Dave
 * Changed readyroom and multi screens to display "st" icon for all
 * missions with mission disk content (not necessarily just those that
 * come with Silent Threat).
 * 
 * 253   9/11/98 5:08p Dave
 * More tweaks to kick notification system.
 * 
 * 252   9/11/98 2:05p Allender
 * make reinforcements work correctly in multiplayer games.  There still
 * may be a team vs team issue that I haven't thought of yet :-(
 * 
 * 251   9/04/98 3:51p Dave
 * Put in validated mission updating and application during stats
 * updating.
 * 
 * 250   8/31/98 2:06p Dave
 * Make cfile sort the ordering or vp files. Added support/checks for
 * recognizing "mission disk" players.
 * 
 * 249   8/25/98 1:48p Dave
 * First rev of EMP effect. Player side stuff basically done. Next comes
 * AI code.
 * 
 * 248   8/12/98 4:53p Dave
 * Put in 32 bit checksumming for PXO missions. No validation on the
 * actual tracker yet, though.
 * 
 * 247   7/24/98 9:27a Dave
 * Tidied up endgame sequencing by removing several old flags and
 * standardizing _all_ endgame stuff with a single function call.
 * 
 * 246   7/10/98 5:04p Dave
 * Fix connection speed bug on standalone server.
 * 
 * 245   7/10/98 11:52a Allender
 * changes to the connection type
 * 
 * 244   7/10/98 1:13a Allender
 * lots of small multiplayer update changes.  Code in launcher to specify
 * connection speed.  A couple of small fixes regarding empty mission
 * files.  Time out players after 10 second when they don't connect on
 * their reliable socket.
 * 
 * 243   7/07/98 2:56p Dave
 * 
 * 242   7/02/98 6:16p Dave
 * Make rear facing prediction much better. Tweak update levels and
 * viewcone values. Make sure observers send targeting info correctly.
 * 
 * 241   6/30/98 2:17p Dave
 * Revised object update system. Removed updates for all weapons. Put
 * button info back into control info packet.
 * 
 * 240   6/22/98 8:36a Allender
 * revamping of homing weapon system.  don't send as object updates
 * anymore
 * 
 * 239   6/17/98 10:56a Dave
 * Put in debug code for detecting potential tracker stats update
 * problems.
 * 
 * 238   6/12/98 2:49p Dave
 * Patch 1.02 changes.
 * 
 * 237   6/10/98 2:56p Dave
 * Substantial changes to reduce bandwidth and latency problems.
 * 
 * 236   6/04/98 10:06p Allender
 * upped packet version
 * 
 * 235   6/04/98 11:46a Dave
 * Drastically reduce size/rate of client control info update packets. Put
 * in rate limiting for object updating from server.
 * 
 *  
 * $NoKeywords: $
 */

#ifndef _MULTI_H
#define _MULTI_H

#include "psnet.h"                                      // for PSNET_SOCKET             
#include "player.h"
#include "multi_ping.h"
#include "missionparse.h"
#include "multi_options.h"
#include "ptrack.h"

// ----------------------------------------------------------------------------------------
// Basic defines
//
//

struct CFILE;

// defines for checking PXO valid missions
#ifdef NDEBUG           
        // NEVER COMMENT OUT THIS LINE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
        #define PXO_CHECK_VALID_MISSIONS                                // always check for valid missions in a debug build
#else
        // #define PXO_CHECK_VALID_MISSIONS                             // comment this in and out as necessary (for testing or not)
#endif

// name of the validated mission file for PXO missions
#define MULTI_VALID_MISSION_FILE                "mvalid.cfg"

// name of the file which contains known TCP addresses
#define IP_CONFIG_FNAME                         "tcp.cfg"

// server version and compatible version
// to join a game - your LOCAL.MULTI_FS_SERVER_COMPATIBLE_VERSION must be >= GAME_SERVER.MULTI_FS_SERVER_VERSION
// Version #. Please put the date down when you up these values
// NOTE: always keep SERVER_VERSION and SERVER_COMPATIBLE_VERSION the same
//
// version 32 - 1/29/99
// version 33 - 2/22/99
// version 34 - 4/8/99
// version 35 - 4/21/99
// version 36 - 4/28/99
// version 37 - 4/29/99
// version 38 - 5/17/77
// version 39 - 7/3/99
// version 40 - 7/7/99
// version 41 - 7/22/99
// version 42 - 7/26/99 (ingame join stuff)
// version 43 - 7/30/99
// version 44 - 8/24/99
// version 46 - 8/30/99
// version 70+ for FS1 - 1/16/03
// STANDALONE_ONLY
#ifdef MAKE_FS1
#define MULTI_FS_SERVER_VERSION                                                 70
#else
#define MULTI_FS_SERVER_VERSION                                                 46
#endif
#define MULTI_FS_SERVER_COMPATIBLE_VERSION                      MULTI_FS_SERVER_VERSION

// version defines (i.e. demo, full version, special OEM version
// id's should not be > 255!!!!
#define NG_VERSION_ID_FULL                                              1

// set the next define to be what version you want to build for.
#define NG_VERSION_ID                                                   NG_VERSION_ID_FULL

// the max # of active players (flying ships)
#define MULTI_MAX_PLAYERS                                       12

// the total max # of connections (players + observers + (possibly)standalone server)
#define MULTI_MAX_CONNECTIONS                           16

// the max # of observers ever allowed
#define MAX_OBSERVERS                                           4

// string length defines
#define MAX_GAMENAME_LEN                                        32                              // maximum length in characters of a game name
#define DESCRIPT_LENGTH                                         512                     // maximum length of a mission description (as specified by Fred)
#define MAX_PASSWD_LEN                                          16                              // maximum length of the password for a netgame

// low level networking defines
#define IP_ADDRESS_LENGTH                                       4                               // length of the address field for an IP address
#define IP_PORT_LENGTH                                          2                               // length of the port field for an IP address

// netgame defines
#define RESPAWN_ANARCHY                                         (0xffffffff)// respawn setting for an "anarchy" style game
#define MP_SINGLE                                                               0                               // not playing a campaign - single mission
#define MP_CAMPAIGN                                                     1                               // playing a campaign

// respawn defines
#define RESPAWN_INVUL_TIMESTAMP                 5000                    // how long a player is invulnerable after he respawns
#define MAX_RESPAWN_POINTS                                      25                              // the max # of respawn points we'll keep track of for any mission

// player information defines
#define BUTTON_INFO_SAVE_COUNT                  30                              // how many buttons infos we keep track of for sending critical keypresses to the server
#define MAX_PINGS                                                               10                              // how many pings we keep track of for averaging player pings
#define OBJECT_UDPATE_DIFF_TOLERANCE    40000                   // how big of a difference in sequence numbers (control_info and object_updates) before we reset

// reliable connect wait
#define MULTI_RELIABLE_CONNECT_WAIT             15

// tracker mission validation status
#define MVALID_STATUS_UNKNOWN                                   -1
#define MVALID_STATUS_VALID                                     0
#define MVALID_STATUS_INVALID                                   1

// ----------------------------------------------------------------------------------------


// ----------------------------------------------------------------------------------------
// Network macros
//
//

// netplayer management
#define NET_PLAYER_INDEX(np)    (np-Net_players)
#define NET_PLAYER_NUM(np)              (NET_PLAYER_INDEX(np))
#define MY_NET_PLAYER_NUM               (NET_PLAYER_INDEX(Net_player))

// determine what the status of this machine is
#define MULTIPLAYER_MASTER                      ( (Game_mode & GM_MULTIPLAYER) && (Net_player->flags & NETINFO_FLAG_AM_MASTER) )
#define MULTIPLAYER_HOST                        ( (Game_mode & GM_MULTIPLAYER) && (Net_player->flags & NETINFO_FLAG_GAME_HOST) )
#define MULTIPLAYER_CLIENT                      ( (Game_mode & GM_MULTIPLAYER) && !(Net_player->flags & NETINFO_FLAG_AM_MASTER) )
#define MULTIPLAYER_STANDALONE  ( (Game_mode & GM_MULTIPLAYER) && (Net_players[0].flags & NETINFO_FLAG_AM_MASTER) && !(Net_players[0].flags & NETINFO_FLAG_GAME_HOST) )

// determine the status of the passed player
#define MULTI_CONNECTED(np)             (np.flags & NETINFO_FLAG_CONNECTED)
#define MULTI_HOST(np)                          (np.flags & NETINFO_FLAG_GAME_HOST)
#define MULTI_SERVER(np)                        (np.flags & NETINFO_FLAG_AM_MASTER)
#define MULTI_STANDALONE(np)            ((np.flags & NETINFO_FLAG_AM_MASTER) && !(np.flags & NETINFO_FLAG_GAME_HOST))
#define MULTI_OBSERVER(np)                      (np.flags & NETINFO_FLAG_OBSERVER)
#define MULTI_TEMP_OBSERVER(np) ((np.flags & NETINFO_FLAG_OBSERVER) && (np.flags & NETINFO_FLAG_OBS_PLAYER))
#define MULTI_PERM_OBSERVER(np) ((np.flags & NETINFO_FLAG_OBSERVER) && !(np.flags & NETINFO_FLAG_OBS_PLAYER))

// are we playing on a master tracker registered server
#define MULTI_IS_TRACKER_GAME    ( (Game_mode & GM_MULTIPLAYER) && (Net_player->flags & NETINFO_FLAG_MT_CONNECTED) )
// ----------------------------------------------------------------------------------------


// ----------------------------------------------------------------------------------------
// Packet definitions and additional packet data types
//
//

#define NETPLAYER_SLOTS_P        0x01     // data telling clients what player has what object number ...
#define FIRING_INFO                                     0x02            // firing info packet
#define INGAME_SHIP_UPDATE       0x03     // ship status-like update for ingame joiners choosing ships.
#define INGAME_SHIP_REQUEST      0x04     // used for requesting a replying (confirm or no) ships for an ingame joiner
#define TEAM_SELECT_UPDATE       0x05     // update from host to players in team select regarding who has what ship
#define FILE_SIG_INFO            0x06     // file signature info ( as calculated by get_bigass_file_signature() )
#define RESPAWN_NOTICE           0x07     // from client to server, or server to client
#define LOAD_MISSION_NOW         0x08     // clients should load the mission and return an ack
#define FILE_SIG_REQUEST         0x09     // request from server to client for filesig info
#define JUMP_INTO_GAME           0x0A     // from server to client telling him to jump into the mission
#define RESPAWN_POINTS           0x0B     // from server to ingame joiners, giving respawn data
#define CLIENT_REPAIR_INFO       0x0C     // passing various data to clients indicating their repair status
#define CARGO_REVEALED                          0x0E            // cargo is known
#define SHIELD_EXPLOSION                        0x0F            // shield explosion

#define SUBSYSTEM_DESTROYED             0x10            // update about a subsystem update
#define MISSION_SYNC_DATA        0x11           // this is a unique packet from the host to the server in a standalone game
#define STORE_MISSION_STATS      0x12           // sent to client indicating the host has hit "accept" and they should update their alltime stats
#define DEBRIS_UPDATE            0x13           // debris position, velocity, orientation, etc update
#define SHIP_WSTATE_CHANGE                      0x14            // used to tell clients that a ship's primary/secondary state changed   
#define WSS_REQUEST_PACKET                      0x15            // from client to server, requesting to do an operation
#define WSS_UPDATE_PACKET                       0x16            // from server to client, given any update
#define KICK_PLAYER                                     0x17            // kick a specific player (sent to server by those who are allowed to do this)
#define MISSION_GOAL_INFO                       0x18            // update of mission goal info
#define ASTEROID_INFO                           0x19            // update of asteroid stuff
#define NETPLAYER_PAIN                          0x1A            // to notify the player of hits which he may not otherwise see
#define OBJECT_UPDATE_NEW                       0x1B
#define SUBSYS_CARGO_REVEALED           0X1C            // Capital ship cargo subsystem is known

#define POST_SYNC_DATA                          0x20            // a very large packet containing all the data players will need before going into the mission itself
#define PLAYER_SETTINGS                         0x21            // player settings for each individual net player
#define WSS_SLOTS_DATA                          0x22            // all weapon slots information for the starting wings (needs to be synched)
#define PLAYER_STATS                                    0x23            // stats for a given player 
#define SLOT_UPDATE                                     0x24            // an player slot position update in multiplayer ship/team select
#define TEAM_UPDATE                                     0x25            // used for performing misc operations on pregame interface screens for team vs. team games
#define INGAME_EXTRA                                    0x26            // extra data for ingame joiners
#define HOST_RESTR_QUERY                        0x27            // query the host when a player joins a restricted game
#define OPTIONS_UPDATE                          0x28            // options (netgame or local) update packet
#define CLIENT_UPDATE                           0x29            // sent from server to client periodically to update important info (pause status, etc)
#define CD_VERIFY                                               0x2A            // cd verification update
#define PRIMARY_FIRED_NEW                       0x2B            // for client-side firing - highly streamlined
#define COUNTERMEASURE_NEW                      0x2C            // for client-side firing
#define EVENT_UPDATE                                    0x2D            // event change

#define SECONDARY_FIRED_AI                      0xA0            // fired a secondary weapon (ai ship)
#define SECONDARY_FIRED_PLR             0xA1            // fired a secondary weapon (player ship)
#define COUNTERMEASURE_FIRED            0xA2            // countermeasure was fired
#define FIRE_TURRET_WEAPON                      0xA3            // a turret weapon was fired
#define SHIP_STATUS_CHANGE       0xA4     // any of the relevant ship status buttons have been hit (need ack from server)
#define PLAYER_ORDER_PACKET      0xA5     // ship and wing commands sent from client to server
#define AI_INFO_UPDATE                          0xA6            // update ai information for the given ship
#define CAMPAIGN_UPDATE                         0xA7            // one of several campaign informational packets
#define CAMPAIGN_UPDATE_INGAME  0xA8            // campaign info for ingame joiner
#define HOMING_WEAPON_UPDATE            0xA9            // update homing object and subsystem for homing missile
#define FLAK_FIRED                                      0xAA            // flak gun fired
#define SELF_DESTRUCT                           0xAB            // self destruct

#define JOIN                                                    0xB1            // a join request to a server
#define ACCEPT                                                  0xB2            // acceptance of a join packet
#define DENY                                                    0xB3            // a join request is denied
#define NOTIFY_NEW_PLAYER                       0xB4            // notify players of a new player
#define MISSION_REQUEST                         0xB5     // request a list of missions on the master.
#define MISSION_ITEM                                    0xB6            // a bundle of mission filenames
#define GAME_INFO                                               0xB7            // game information packet for an active server
#define MULTI_PAUSE_REQUEST             0xB8            // send a request to the server to pause or unpause the game
#define TRANSFER_HOST                           0xB9     // transfer host status to the receiver
#define CHANGE_SERVER_ADDR                      0xBA     // change your host_addr to this value 
#define ACCEPT_PLAYER_DATA                      0xBB            // player data -- sent after guy is accepted
#define BEAM_FIRED                                      0xBC            // a beam weapon was fired
#define SW_STD_QUERY                                    0xBD            // query from host to standalone server to query PXO about a squad war match

#define HUD_MSG                                         0xC1            // a hud message
#define LEAVE_GAME                                      0xC2            // indication that a player is leaving the game
#define GAME_CHAT                                               0xC3            // this chat packet used for Freespace
#define MISSION_MESSAGE                         0xC4            // a message (squadmate, etc)
#define SHIP_DEPART                                     0xC5            // a ship has left the building
#define SHIPS_INGAME_PACKET             0xC6     // ingame join ship data packet
#define WINGS_INGAME_PACKET             0xC7            // ingame join wing data packet
#define MISSION_END                                     0xC8     // sent from host(master) to clients indicating they should go to the debriefing
#define INGAME_NAK                                      0xC9     // opposite of INGAME_ACK. Uses the ACK_* defines as well.
#define OBSERVER_UPDATE                         0xCA     // sent from observers to server to give position and orientation
#define SQUADMSG_PLAYER                         0xCB            // a squadmate message command has been sent to a netplayer
#define OBJ_UPDATE_SYNC                         0xCC            // object update timebase syncing code

#define WEAPON_DET                                      0xD1            // a weapon has detonated, possibly with child weapons
#define SHIP_KILL                                               0xD2            // a ship was killed
#define WING_CREATE                                     0xD3            // create and warp in a wing of ships
#define SHIP_CREATE                                     0xD4            // create and wrap in a ship
#define PING                                          0xD5     // ping
#define PONG                                          0xD6              // pong
#define XFER_PACKET                           0xD7              // file xfer data of one kind or another
#define VOICE_PACKET                                    0xD8            // a voice streaming packet of one kind or another
#define NETGAME_END_ERROR                       0xD9            // the netgame has been ended by the server because of an error (passed error code)
#define COUNTERMEASURE_SUCCESS  0xDA            // countermeasure was successful for this player.
#define REINFORCEMENT_AVAIL             0xDB            // a reinforcement is available
#define LIGHTNING_PACKET                        0xDC            // lightning bolt packet for multiplayer nebula
#define BYTES_SENT                                      0xDD            // how much data we've sent/received

#define GAME_ACTIVE                                     0xE1            // info on an active game server
#define GAME_QUERY                                      0xE2            // request for a list of active game servers
#define GAME_UPDATE                                     0xE3            // update info on an active game server
#define NETPLAYER_UPDATE                        0xE4            // a player update packet
#define OBJECT_UPDATE                           0xE6            // an object update packet from server to all clients
#define MISSION_LOG_ENTRY                       0xE7            // ad an item into the mission log
#define UPDATE_DESCRIPT                         0xE8            // update the netgame description
#define COUNTDOWN                                               0xE9            // countdown timer for starting a game (pretty benign)
#define DEBRIEF_INFO                                    0xEA            // end of mission debriefing information
#define EMP_EFFECT                                      0xEB            // EMP effect (mission disk only)
#define CHANGE_IFF                                      0xEC            // change iff (1.04+ only)

#define MAX_TYPE_ID                                     0xFF            // better not try to send > 255 in a single byte buddy

// ingame ack data codes
#define ACK_RESPAWN_POINTS                      0x1             // from ingame joiner to server, indicating he got the respawn points packet
#define ACK_FILE_ACCEPTED        0x2            // server to client saying their file is valid
#define ACK_FILE_REJECTED        0x3            // server to client saying their file is not valid

// join request denial codes
#define JOIN_DENY_JR_STATE                              0               // join request is rejected because the game is not in the proper state
#define JOIN_DENY_JR_TRACKER_INVAL      1               // join request is rejected because the game is an MT game and the passed player info is invalid
#define JOIN_DENY_JR_PASSWD                     2               // join request is rejected because the game is password protected and the password sent is incorrect
#define JOIN_DENY_JR_CLOSED                     3               // join request is rejected because the game is closed and is currently ingame
#define JOIN_DENY_JR_RANK_HIGH          4               // join request is rejected because the game is rank based and the passed rank is too high
#define JOIN_DENY_JR_RANK_LOW                   5               // join request is rejected because the game is rank based and the passed rank is too low
#define JOIN_DENY_JR_DUP                                6               // join request is denied because there is an exiting netplayer with matching characteristics
#define JOIN_DENY_JR_FULL                               7               // join request is denied because the game is full
#define JOIN_DENY_JR_TEMP_CLOSED                8               // join request is denied because the _forming_ netgame has been toggled closed
#define JOIN_DENY_JR_BANNED                     9               // join request is denied because the player has been banned for the duration of the game
#define JOIN_DENY_JR_NOOBS                              10              // join request is denied because observers are not allowed
#define JOIN_DENY_JR_INGAME_JOIN                11              // join request is denied because someone else is already ingame joining
#define JOIN_DENY_JR_BAD_VERSION                12              // incompatible version types
#define JOIN_QUERY_RESTRICTED                   13              // poll the host of the game to see if he accepts this player
#define JOIN_DENY_JR_TYPE                               14              // cannot ingame join anything but dogfight games

// repair info codes
#define REPAIR_INFO_BEGIN                       0x1             // server to client - set your REPAIRING flags
#define REPAIR_INFO_END                         0x2             // server to client - unset your REPAIRING flags
#define REPAIR_INFO_UPDATE                      0x3             // server to client - here's some repair update info (not currently used)
#define REPAIR_INFO_QUEUE                       0x4             // server to client - client is queued for rearming.
#define REPAIR_INFO_ABORT                       0x5             // server to client - client has aborted a rearm/repair
#define REPAIR_INFO_BROKEN                      0x6             // server to client - client is breaking repair -- might be reestablished
#define REPAIR_INFO_WARP_ADD            0x7             // server to client - add client onto list of people for arriving support ship
#define REPAIR_INFO_WARP_REMOVE 0x8             // server to client - remove client from list of people for arriving support ship
#define REPAIR_INFO_ONWAY                       0x9             // server to client - repair ship on way
#define REPAIR_INFO_KILLED                      0xa             // server to client - repair ship was killed on way to rearm player
#define REPAIR_INFO_COMPLETE            0xb             // server to client - repair of your ship is complete

// debris update codes
#define DEBRIS_UPDATE_UPDATE                    0x1             // update a piece
#define DEBRIS_UPDATE_REMOVE                    0x2             // remove a piece of debris
#define DEBRIS_UPDATE_NUKE                              0x3             // blow up a piece of debris
#define DEBRIS_UPDATE_CREATE_HULL       0x4             // create a piece of debris

// weapon select/ship select update packets
#define WSS_WEAPON_SELECT                       0x1             // ship select stuff
#define WSS_SHIP_SELECT                         0x2             // weapon select stuff

// accept packet codes
#define ACCEPT_INGAME                           (1<<0)  // accept the player as an ingame joiner
#define ACCEPT_HOST                                     (1<<1)  // accept the player as the host of the game
#define ACCEPT_OBSERVER                         (1<<2)  // accept the player as an observer
#define ACCEPT_CLIENT                           (1<<3)  // accept the player as a normal, non ingame join, non host player

// accept player data codes
#define APD_NEXT                                                0                       // there is still more player data
#define APD_END_PACKET                          1                       // end of this packet
#define APD_END_DATA                                    2                       // end of the data

// ingame ship request codes            
#define INGAME_SR_REQUEST                       0x1             // request for the ship with the given net signature
#define INGAME_SR_CONFIRM                       0x2             // confirmation to the client that he can use the requested ship
#define INGAME_SR_DENY                          0x3             // deny the request the ingame joiner made for the ship
#define INGAME_PLAYER_CHOICE            0x4             // sent to other players informing them of ingame joiners choice

// ai info update codes
#define AI_UPDATE_DOCK                          0x1             // server tells clients which ships are now docked
#define AI_UPDATE_UNDOCK                        0x2             // server tells clients which ships have undocked
#define AI_UPDATE_ORDERS                        0x3             // server tells clients about new AI order for the ship

// requests to the standalong
#define MISSION_LIST_REQUEST            0x1             // ask for list of missions
#define CAMPAIGN_LIST_REQUEST           0x2             // ask for list of campaigns

// asteroid stuff
#define ASTEROID_CREATE                         0x1             // create an asteroid
#define ASTEROID_THROW                          0x2             // throw an asteroid
#define ASTEROID_HIT                                    0x3             // asteroid hit occured

// commands for squadmate messages
#define SQUAD_MSG_SHIP                          0x1
#define SQUAD_MSG_WING                          0x2
#define SQUAD_MSG_ALL                           0x3
#define SQUAD_MSG_REINFORCEMENT 0x4

// SW_STD_QUERY codes
#define SW_STD_START                                    0x1             // from host to standalone saying "query the tracker"
#define SW_STD_OK                                               0x2             // from standalone to host - "everything is cool"
#define SW_STD_BAD                                      0x3             // from standalone to host - "everything is bad"

// stats block packet
#define STATS_MISSION                           0                       // all stats for the mission, for one player
#define STATS_ALLTIME                           1                       // alltime stats, for one player
#define STATS_MISSION_KILLS             2                       // mission kills and assists
#define STATS_DOGFIGHT_KILLS            3                       // same as mission kills, but also sends per-player kills


// ----------------------------------------------------------------------------------------


// ----------------------------------------------------------------------------------------
// Multiplayer structure definitions
//
//

// definition of header packet used in any protocol
typedef struct header {
        int             bytes_processed;                                                                                        // used to determine how many bytes this packet was
        ubyte           addr[IP_ADDRESS_LENGTH];                                                                                // obtained from network-layer header
        short           port;                                                                                                                   // obtained from network-layer header
        short           id;                                                                                                                     // will be stuffed with player_id (short)
} header;

// NETPLAYER INFORMATION THE SERVER AND THE INDIVIDUAL CLIENT MUST HAVE
typedef struct net_player_server_info {         
        ping_struct             ping;                                                                                                   // evaluated by the ping module
        int                             wing_index_backup;                                                              // in case of fail on the last packet
        int                             wing_index;                                                                                     // index of the next wing data item to be sent
        int                             ingame_join_flags;                                                              // status flags for an ingame joiner
        int                             invul_timestamp;                                                                        // invulnerability flag timestamp (for respawning after dying)
        button_info             last_buttons[BUTTON_INFO_SAVE_COUNT];           // button info for sending critical control packets to the server
        int                             last_buttons_id[BUTTON_INFO_SAVE_COUNT];        //
        fix                             last_buttons_time[BUTTON_INFO_SAVE_COUNT];//
        int                             num_last_buttons;                                                                       //
        fix                             last_full_update_time;                                                  // time when server last updated this player position/orientation
        int                             xfer_handle;                                                                            // handle to the file xfer handle (-1 if no file xfer is taking place)
        int                             kick_timestamp;                                                                 // timestamp with which we'll disconnect a player if he hasn't reponded to a kick packet
        int                             kick_reason;                                                                            // reason he was kicked
        int            voice_token_timestamp;                                                   // timestamp set when a player loses a token (so we can prevent him from getting it again too quickly)
        time_t                  reliable_connect_time;                                                  // after sending an accept packet, wait for this long for the guy to connect on the reliable socket

        // weapon select/linking information (maintained on the server and passed on respawn to all clients)
        char                            cur_primary_bank;                                                                       // currently selected primary bank
        char                            cur_secondary_bank;                                                             // currently selected secondary bank
        ubyte                           cur_link_status;                                                                        // if (1<<0) - primaries linked. if (1<<1) - secondaries are linked

        // information regarding the current view position of this player.
        vector                  eye_pos;                                                                // eye position and orientation
        matrix                  eye_orient;

        // ets information
        ushort                  ship_ets;                                                       // ets settings (sigh......)

        // tracker information
        int                             tracker_security_last;                  // this is the value returned when getting tracker data. it must be used when "sending" tracker data
        unsigned int    tracker_checksum;                                       // tracker checksum

        // common targeting information
        int                             target_objnum;

        // rate limiting information
        int                             rate_stamp;                                                     // rate limiting timestamp
        int                             rate_bytes;                                                     // bytes sent this "second"

        // firing info (1<<0) for primary fire, (1<<1) for secondary fired, (1<<2) for countermeasure fired, (1<<3) for afterburner on
        // basically, we set these bits if necessary between control info sends from the client. once sent, these values are
        // cleared until the next send time
        ubyte                           accum_buttons;                          
        
        // buffered packet info
        ubyte                                   unreliable_buffer[MAX_PACKET_SIZE];     // buffer used to buffer unreliable packets before sending as a single UDP packet
        int                                     unreliable_buffer_size;                                 // length (in bytes) of data in unreliable send_buffer
        ubyte                                   reliable_buffer[MAX_PACKET_SIZE];       // buffer used to buffer reliable packets before sending as a single UDP packet
        int                                     reliable_buffer_size;                                   // length (in bytes) of data in reliable send_buffer
} net_player_server_info;

// NETPLAYER INFORMATION ALL COMPUTERS IN THE GAME MUST HAVE
typedef struct net_player_info {
        p_object                        *p_objp;                                                                // pointer to parse object for my ship -- used with respawns
        int                             team;                                                                   // valid for team v. team games -- which team is this guy on
        int                             ship_index;                                                     // index into the ship choices in team select/ship select (out of 12 choices)
        int                             ship_class;                                                     // the ship class of the players ship
        multi_local_options options;                                            // players options settings     
        net_addr_t                      addr;
        char                            pxo_squad_name[LOGIN_LEN];              // PXO squadron name
} net_player_info;

// NETPLAYER COMMON INFORMATION
typedef struct net_player {
        player_t                        *player;                                                                // stuff pertaining directly to the player (callsign, etc).
        short                           player_id;                                                      // player id (always use this instead of ip address for identification purposes)
        int                             tracker_player_id;            // the tracker id for this player, only matters in
                                                                                                                                // tracker games.       
        int                             flags;                                                          // tells us interesting information about this player
        int                             state;                                                          // one of the NETGAME_STATE_* flags below -- used for sequencing
        PSNET_SOCKET_RELIABLE   reliable_socket;                // reliable socket to server
        
        ushort                  client_cinfo_seq;                                       // sequence # for client control info packets
        ushort                  client_server_seq;                              // sequence # for incoming object update packets                
        
        fix                             last_heard_time;                                        // time when last heard from this player

        net_player_server_info  s_info;                                 // server critical info
        net_player_info                 p_info;                                 // player critical info

        // bytes sent and received
        // SERVER-side
        int                             sv_bytes_sent;                                          // bytes we've sent to this guy (on the server) 
        int                             sv_last_pl;                                                     // packet loss

        // CLIENT-side
        int                             cl_bytes_recvd;                                 // bytes we've received (as a client)           
        int                             cl_last_pl;                                                     // packet loss
} net_player;

// structure which describes the state of the multiplayer game currently being played
typedef struct netgame_info {
        char            name[MAX_GAMENAME_LEN+1];               // name of the netgame (host can set this!)
        char            mission_name[NAME_LENGTH+1];    // current mission name (filename)
        char            title[NAME_LENGTH+1];                   // title of the mission (as appears in the mission file)
        char            campaign_name[NAME_LENGTH+1];   // current campaign name        
        char            passwd[MAX_PASSWD_LEN+1];               // password for the game
        int             version_info;                                           // version info for this game.
        int             type_flags;                                                     // see NG_TYPE_* defines
        int             mode;                                                                   // see NG_MODE_* defines
        int             flags;                                                          // see NG_FLAG_* defines
        int             rank_base;                                                      // used to compare against connecting players (rank above/rank below)   
        int      max_players;           
        int             game_state;                                                     // state (briefing, in mission, etc) this game is in
        int             security;                                                       // some random number that should hopefully be unique for each game started
                                                                                                                // I'm also using this value to use as a starting base for the net_signature
                                                                                                                // for object synchronization.
        float    ping_time;                                                     // ping time to this server
        net_addr_t      server_addr;                                            // address of the server
        net_player *host;
        net_player *server;                                                     // pointer to the server                

        uint respawn;

        int campaign_mode;                                                      // 0 == single mission mode, 1 == starting campaign

        ushort   server_update_seq;                             // the current object update reference count (server-side only)
        int      server_update_frame_ref;               // used to determine when we should increment the server_update_seq value

        multi_server_options options;                           // server options settings

        ubyte           debug_flags;                                            // special debug flags (see NETD_FLAG_* defines)
} netgame_info;

// netgame debug flags
// #define NETD_FLAG_CLIENT_FIRING                              (1<<0)          // client side firing of primaries and countermeasures
// #define NETD_FLAG_CLIENT_NODAMAGE                    (1<<1)          // client never applies damage himself. he simply waits for blanket updates
#define NETD_FLAG_OBJ_NEW                                               (1<<2)          // new style of object updating

// structure for active games -- kind of like Descent, but using the linked list thing, we will
// be able to support many more games in the list.
#define AG_FLAG_COOP                                                            (1<<0)                  // is a coop game
#define AG_FLAG_TEAMS                                                   (1<<1)                  // is a team vs. team game
#define AG_FLAG_DOGFIGHT                                                (1<<2)                  // is a dogfight game
#define AG_FLAG_FORMING                                                 (1<<3)                  // game is currently forming
#define AG_FLAG_BRIEFING                                                (1<<4)                  // game is in the briefing state
#define AG_FLAG_DEBRIEF                                                 (1<<5)                  // game is in the debriefing state
#define AG_FLAG_PAUSE                                                   (1<<6)                  // game is paused
#define AG_FLAG_IN_MISSION                                              (1<<7)                  // game is in mission
#define AG_FLAG_PASSWD                                                  (1<<8)                  // is a password protected game
#define AG_FLAG_STANDALONE                                              (1<<9)                  // this is a standalone server
#define AG_FLAG_CAMPAIGN                                                (1<<10)                 // the server is playing in campaign mode

// flags for defining the connection speed
#define AG_FLAG_CONNECTION_SPEED_MASK           ((1<<12)|(1<<13)|(1<<14))       // mask for the connection speed

#define AG_FLAG_VALID_MISSION                                   (1<<15)                 // the mission is a "valid" tracker mission

#define AG_FLAG_CONNECTION_BIT                          12                                              // number of bits to shift right or left to get speed

#define AG_FLAG_TYPE_MASK                                               (AG_FLAG_COOP|AG_FLAG_TEAMS|AG_FLAG_DOGFIGHT)
#define AG_FLAG_STATE_MASK                                              (AG_FLAG_FORMING|AG_FLAG_BRIEFING|AG_FLAG_DEBRIEF|AG_FLAG_PAUSE|AG_FLAG_IN_MISSION)

typedef struct active_game {
        active_game             *next, *prev;                           // next and previous elements in the list       
        int                             heard_from_timer;                       // when we last heard from the game     
        
        char            name[MAX_GAMENAME_LEN+1];
        char            mission_name[NAME_LENGTH+1];
        char            title[NAME_LENGTH+1];   
        ubyte           num_players;
        net_addr_t      server_addr;    
        ushort  flags;                                                          // see above AG_FLAG_* defines
        ubyte           version,comp_version;                   // version and compatible version
        ping_struct ping;                                                               // ping time to the server
} active_game;

// permanent server list (read from tcp.cfg)
typedef struct server_item {
        server_item *next, *prev;

        net_addr_t server_addr;
} server_item;

// sent to the server on a join request with various data
#define JOIN_FLAG_AS_OBSERVER                   (1<<0)  // wants to join as an aboserver
#define JOIN_FLAG_HAS_CD                                (1<<1)  // currently has a CD in the drive
#define JOIN_FLAG_HAXOR                                 (1<<2)  // if the player has hacked data
typedef struct join_request {
        char passwd[MAX_PASSWD_LEN+1];                          // password for a password protected game
        char callsign[CALLSIGN_LEN+1];                          // player's callsign
        char image_filename[MAX_FILENAME_LEN+1];        // player's image filename
        char squad_filename[MAX_FILENAME_LEN+1];        // player's squad filename      
        ubyte player_rank;                                                              // the rank of the requesting player
        ubyte flags;                                                                            // misc flags associated with this guy
        int tracker_id;                                                                 // player's tracker ID #
        multi_local_options player_options;                     // player's options
        ubyte version, comp_version;                                    // local version and comp_version

        // multiplayer squad war info
        char pxo_squad_name[LOGIN_LEN];                         // squad name
} join_request;

// network buffer for sending and receiving packets
typedef struct network_buffer {
        int     size;                                                                           // size of the buffer
        ubyte   data[MAX_PACKET_SIZE];                          // MAX_PACKET_SIZE from psnet.h
} network_buffer;
// -------------------------------------------------------------------------------------


// ----------------------------------------------------------------------------------------
// Multiplayer structure flags/settings
//
//

// flags used for the net_player structure
#define NETINFO_FLAG_CONNECTED                          (1<<0)          // if this player connected
#define NETINFO_FLAG_AM_MASTER                          (1<<1)          // is this player the master
#define NETINFO_FLAG_MT_CONNECTED                       (1<<2)      // if everything is hunky dory with the tracker connection
#define NETINFO_FLAG_MT_FAILED                          (1<<3)      // all attempts to connect have failed
#define NETINFO_FLAG_MT_STARTUP                         (1<<4)      // the initial state (ie, we haven't tried anything yet)
#define NETINFO_FLAG_GAME_HOST                          (1<<5)      // I'm the host
#define NETINFO_FLAG_INGAME_JOIN                                (1<<6)      // means he is still in the process of joining ingame
#define NETINFO_FLAG_OBSERVER                                   (1<<7)      // means he's an observer
#define NETINFO_FLAG_OBS_PLAYER                         (1<<8)      // means he's an observer, but he was formerly a player (should show his stats)
#define NETINFO_FLAG_LIMBO                                              (1<<9)      // (client side) means he has to choose whether to be an observer or quit (no more respawns)
#define NETINFO_FLAG_MISSION_OK                         (1<<10)     // this client's mission has been verified
#define NETINFO_FLAG_RESPAWNING                         (1<<11)     // so that we wait on a keypress, or other user input before respawning
#define NETINFO_FLAG_DO_NETWORKING                      (1<<12)         // set when we can send/receive data
#define NETINFO_FLAG_TEAM_LOCKED                                (1<<13)         // if this is set, only the host can modify the team settings for this player
#define NETINFO_FLAG_TEAM_CAPTAIN                       (1<<14)         // this player is the captain of his team
#define NETINFO_FLAG_KICKED                                     (1<<15)         // this player was kicked
#define NETINFO_FLAG_ACCEPT_INGAME                      (1<<16)         // accepted ingame
#define NETINFO_FLAG_ACCEPT_HOST                                (1<<17)         // accetped as host
#define NETINFO_FLAG_ACCEPT_OBSERVER            (1<<18)         // accepted as observer
#define NETINFO_FLAG_ACCEPT_CLIENT                      (1<<19)         // accepted as client
#define NETINFO_FLAG_WARPING_OUT                                (1<<20)         // clients keep track of this for themselves to know if they should be leaving
#define NETINFO_FLAG_HAS_CD                                     (1<<21)         // the player has a CD in the drive
#define NETINFO_FLAG_RELIABLE_CONNECTED (1<<22)         // reliable socket is now active
#define NETINFO_FLAG_MT_GET_FAILED                      (1<<23)         // set during MT stats update process indicating we didn't properly get his stats
#define NETINFO_FLAG_MT_SEND_FAILED                     (1<<24)         // set during MT stats update process indicating we didn't properly send his stats
#define NETINFO_FLAG_MT_DONE                                    (1<<25)         // set when a player has been processed for stats (fail, succeed, or otherwise)
#define NETINFO_FLAG_HAXOR                                              (1<<26)         // the player has some form of hacked client data

#define NETPLAYER_IS_OBSERVER(player)           (player->flags & (NETINFO_FLAG_OBSERVER|NETINFO_FLAG_OBS_PLAYER))
#define NETPLAYER_IS_DEAD(player)                       (player->flags & (NETINFO_FLAG_LIMBO|NETINFO_FLAG_RESPAWNING))

// netgame modes
#define NG_MODE_OPEN                                                            1                               // an open game
#define NG_MODE_CLOSED                                                  2                               // a closed game
#define NG_MODE_PASSWORD                                                3                               // a password protected game
#define NG_MODE_RESTRICTED                                              4                               // a restricted game
#define NG_MODE_RANK_ABOVE                                              5                               // ranks above a certain rank are allowed
#define NG_MODE_RANK_BELOW                                              6                               // ranks below a certain rank are allowed

// netgame option flags
#define NG_FLAG_TEMP_CLOSED                                     (1<<0)          // a forming netgame is temporarily closed (should not be checked otherwise)
#define NG_FLAG_SERVER_LOST                                     (1<<1)          // client has temporarily lost contact with the server
#define NG_FLAG_INGAME_JOINING                          (1<<2)          // someone is ingame joining.
#define NG_FLAG_INGAME_JOINING_CRITICAL (1<<3)          // someone is ingame joining and at the critical point where we cannot do certain things.
#define NG_FLAG_STORED_MT_STATS                         (1<<4)          // stored tracker stats in the debriefing already
#define NG_FLAG_HACKED_SHIPS_TBL                                (1<<5)          // set when the server is playing with a hacked ships.tbl (only needed to notify hosts playing on a standalone)
#define NG_FLAG_HACKED_WEAPONS_TBL                      (1<<6)          // set when the server is playing with a hacked weapons.tbl (only needed to notify hosts playing on a standalone)

// netgame type flags
#define NG_TYPE_COOP                                                            (1<<0)          // cooperative mode
#define NG_TYPE_TVT                                                             (1<<1)          // team vs. team mode
#define NG_TYPE_SW                                                              (1<<2)          // squad war
#define NG_TYPE_TEAM                                                            ( NG_TYPE_TVT | NG_TYPE_SW )
#define NG_TYPE_DOGFIGHT                                                (1<<3)          // plain old dogfight mode

// state defines for netgame states
#define NETGAME_STATE_FORMING                                   1                               // players are joining, host is selecting missions, etc
#define NETGAME_STATE_BRIEFING                          2                               // players are reading the mission briefing
#define NETGAME_STATE_IN_MISSION                                3                               // the mission itself is being played
#define NETGAME_STATE_SERVER_TRANSFER           4                               // server status is being transferred from one computer to another
#define NETGAME_STATE_PAUSED                                    5                               // the netgame is paused
#define NETGAME_STATE_DEBRIEF                                   6                               // the debriefing screen                        
#define NETGAME_STATE_MISSION_SYNC                      7                               // client/server data sync screens before and after the briefing stage
#define NETGAME_STATE_ENDGAME                                   8                               // game is moving from gameplay to the debriefing state
#define NETGAME_STATE_STD_HOST_SETUP            9                               // the host is on the setup netgame screen for the standalone server
#define NETGAME_STATE_HOST_SETUP                                10                              // the host is on the setup netgame screen _non_ standalone

// state defines for netplayer states
#define NETPLAYER_STATE_JOINING                         0                               // joining the netgame
#define NETPLAYER_STATE_JOINED                          1                               // has joined and opened a reliable socket connection
#define NETPLAYER_STATE_MISSION_LOADING 2                               // in the process of loading the mission
#define NETPLAYER_STATE_MISSION_LOADED          3                               // mission loaded
#define NETPLAYER_STATE_BRIEFING                                4                               // in the briefing
#define NETPLAYER_STATE_SHIP_SELECT                     5                               // in the ship selection screen
#define NETPLAYER_STATE_WEAPON_SELECT           6                               // in the weapon selection screen
#define NETPLAYER_STATE_DATA_LOAD                       7                               // loading specific data (textures, etc)
#define NETPLAYER_STATE_WAITING                         8                               // waiting to do something (like enter the mission)
#define NETPLAYER_STATE_SLOT_ACK                                9                               // got player ship slot packets
#define NETPLAYER_STATE_IN_MISSION                      10                              // in the mission itself
#define NETPLAYER_STATE_INGAME_SHIPS            11                              // player is receiving ingame join ship data
#define NETPLAYER_STATE_INGAME_WINGS            12                              // player is receiving ingame join wing data
#define NETPLAYER_STATE_INGAME_RPTS                     13                              // player is receiving ingame join respawn data
#define NETPLAYER_STATE_INGAME_SHIP_SELECT 14                   // player is in the ship select screen for ingame join
#define NETPLAYER_STATE_DEBRIEF                         15                              // player is in the debrief state (screen)
#define NETPLAYER_STATE_MISSION_SYNC            16                              // player is in the mission sync screen
#define NETPLAYER_STATE_STD_HOST_SETUP          17                              // the host is on the setup netgame screen for the standalone server
#define NETPLAYER_STATE_HOST_SETUP                      18                              // the host is on the setup netgame screen _non_ standalone
#define NETPLAYER_STATE_SETTINGS_ACK            19                              // the player has received the player settings data for all players
#define NETPLAYER_STATE_SLOTS_ACK                       20                              // the player has received wss slots data (ingame join only)
#define NETPLAYER_STATE_POST_DATA_ACK           21                              // the player has received the post briefing data block
#define NETPLAYER_STATE_WSS_ACK                         22                              // have received weapon slot information
#define NETPLAYER_STATE_FLAG_ACK                                23                              // the player has received his flag change information
#define NETPLAYER_STATE_MT_STATS                                24                              // the server is in the process of requesting or updating stats from the MT
#define NETPLAYER_STATE_MISSION_XFER            25                              // the player is in the process of receiving a mission file
#define NETPLAYER_STATE_INGAME_STUFF            26                              // received ingame "stuff"  happens just before ship selection
#define NETPLAYER_STATE_DEBRIEF_ACCEPT          27                              // the player has hit the accept button in the debrief and is good to go
#define NETPLAYER_STATE_DEBRIEF_REPLAY          28                              // set on the host instead of NETPLAYER_STATE_DEBRIEF_ACCEPT to indicate he wants to replay the mission
#define NETPLAYER_STATE_CPOOL_ACK                       29                              // player has acked all campaign pool status data
#define NETPLAYER_STATE_INGAME_CINFO            30                              // player has received campaign information (ingame join only)

// defines for connection speed
#define CONNECTION_SPEED_NONE                                   -1                              // not really used except for error checking

#define CONNECTION_SPEED_288                                    0
#define CONNECTION_SPEED_56K                                    1
#define CONNECTION_SPEED_SISDN                          2
#define CONNECTION_SPEED_CABLE                          3
#define CONNECTION_SPEED_T1                                     4

// use this to check and see whether a netgame is anywhere in mission (paused, etc, etc)
#define MULTI_IN_MISSION                                                ( (Netgame.game_state == NETGAME_STATE_IN_MISSION) || (Netgame.game_state == NETGAME_STATE_PAUSED) )

extern int Multi_connection_speed;

// -------------------------------------------------------------------------------------


// ----------------------------------------------------------------------------------------
// Multiplayer global vars
//
//

// netplayer vars
extern net_player Net_players[MAX_PLAYERS];                                             // array of all netplayers in the game
extern net_player *Net_player;                                                                          // pointer to console's net_player entry

// network object management
#define SHIP_SIG_MIN                            1
#define SHIP_SIG_MAX                            (0x2fff)

#define STANDALONE_SHIP_SIG     (SHIP_SIG_MAX+1)
#define REAL_SHIP_SIG_MAX               (0x3fff)

#define DEBRIS_SIG_MIN                  (REAL_SHIP_SIG_MAX+1)
#define DEBRIS_SIG_MAX                  (0x5fff)

#define ASTEROID_SIG_MIN                (DEBRIS_SIG_MAX+1)
#define ASTEROID_SIG_MAX                (0x7fff)

#define NPERM_SIG_MIN                   (ASTEROID_SIG_MAX+1)
#define NPERM_SIG_MAX                   (0xffff)

extern ushort Next_ship_signature;                                                                      // next network signature to assign to an object
extern ushort Next_asteroid_signature;                                                          // next asteroid signature
extern ushort Next_non_perm_signature;                                                          // next non-permanent signature
extern ushort Next_debris_signature;                                                            // next debris signature

// netgame vars
extern netgame_info Netgame;                                                                                    // netgame information
extern int Multi_mission_loaded;                                                                                // flag, so that we dont' load the mission more than once client side
extern ushort Multi_ingame_join_sig;                                                                    // signature for the player obj for use when joining ingame
extern int Multi_button_info_ok;                                                                                // flag saying it is ok to apply critical button info on a client machine
extern int Multi_button_info_id;                                                                                // identifier of the stored button info to be applying

// low level networking vars
extern const int HEADER_LENGTH;                                                                                         // 1 byte (packet type)

// misc data
extern active_game* Active_game_head;                                                           // linked list of active games displayed on Join screen
extern int Active_game_count;                                                                                   // for interface screens as well
extern CFILE* Multi_chat_stream;                                                                                // for streaming multiplayer chat strings to a file
extern int Multi_has_cd;                                                                                                // if this machine has a cd or not (call multi_common_verify_cd() to set this)
extern int Multi_num_players_at_start;                                                          // the # of players present (kept track of only on the server) at the very start of the mission
extern short Multi_id_num;                                                                                              // for assigning player id #'s

// permanent server list
extern server_item* Game_server_head;                                                           // list of permanent game servers to be querying

// restricted game vars
#define MULTI_QUERY_RESTR_STAMP                 5000                                            // 5 seconds to reply
#define MULTI_JOIN_RESTR_MODE_1                 0                                                       // mode 1 - normal restricted join
#define MULTI_JOIN_RESTR_MODE_2                 1                                                       // mode 2 - team vs. team, only team 0 has ships
#define MULTI_JOIN_RESTR_MODE_3                 2                                                       // mode 3 - team vs. team, only team 1 has ships
#define MULTI_JOIN_RESTR_MODE_4                 3                                                       // mode 4 - team vs. team, both teams have ships

extern int Multi_restr_query_timestamp;                                                 // timestamp for querying the host to see if he will allow a new player to join ingame
extern join_request Multi_restr_join_request;                                   // join request for the query
extern net_addr_t Multi_restr_addr;                                                                     // net address of the join request
extern int Multi_join_restr_mode;                                                                       // what mode we're in

// non API master tracker vars
extern char Multi_tracker_login[100];
extern char Multi_tracker_passwd[100];
extern char Multi_tracker_squad_name[100];
extern int Multi_tracker_id;
extern char Multi_tracker_id_string[255];

// current file checksum
extern ushort Multi_current_file_checksum;
extern int Multi_current_file_length;


// ----------------------------------------------------------------------------------------
// Multiplayer main functions
//
//

// module handling functions -------------------

// called at game startup
void multi_init();

// called whenever a netgame is started
void multi_level_init();

// reset all relevant main networking loop timestamps
void multi_reset_timestamps();

// returns true is server hasn't been heard from in N seconds. false otherwise
int multi_client_server_dead();


// netgame data processing functions -----------

// do all network processing for this game frame
void multi_do_frame();

// analog of multi_do_frame() called when netgame is in the pause state
void multi_pause_do_frame();

// process all incoming packets
// void multi_process_bigdata(ubyte* data, int size, net_addr* from_addr);

// process all reliable socket details
void multi_process_reliable_details();


// standalone handling functions ---------------

// initialize the standalone
void standalone_main_init();

// do frame for the main standalone state
void standalone_main_do();

// close for the main standalone state
void standalone_main_close();

// reset all standalone stuff, including gui, networking, netgame, etc, and go into the main state
void multi_standalone_reset_all();

// init for the wait mode of the standalone (when waiting for players to finish the briefing)
void multi_standalone_wait_init();

// do frame for the standalone wait state (when waiting for players to finish the briefing)
void multi_standalone_wait_do();

// close for the standalone wait state (when waiting for players to finish the briefing)
void multi_standalone_wait_close();

// init for the standalone postgame state (when players are in the debriefing)
void multi_standalone_postgame_init();

// do frame for the standalone postgame state (when players are in the debriefing)
void multi_standalone_postgame_do();

// close for the standalone postgame state (when players are in the debriefing_
void multi_standalone_postgame_close();

#endif