src/network/psnet2.cpp

   1 /*
   2  * Copyright (C) Volition, Inc. 1999.  All rights reserved.
   3  *
   4  * All source code herein is the property of Volition, Inc. You may not sell
   5  * or otherwise commercially exploit the source or things you created based on
   6  * the source.
   7  */
   8
   9 /*
  10  * $Logfile: /Freespace2/code/Network/Psnet2.cpp $
  11  * $Revision$
  12  * $Date$
  13  * $Author$
  14  *
  15  * C file containing application level network-interface.
  16  *
  17  * $Log$
  18  * Revision 1.14  2005/10/02 09:30:10  taylor
  19  * sync up rest of big-endian network changes.  it should at least be as good as what's in FS2_Open now, only better :)
  20  *
  21  * Revision 1.13  2005/10/01 22:01:28  taylor
  22  * some cleanup of earlier big-endian changes
  23  *
  24  * Revision 1.12  2004/07/04 11:39:06  taylor
  25  * fix missing debrief text, crash on exit, path separator's, warning fixes, no GR_SOFT
  26  *
  27  * Revision 1.11  2004/06/11 01:52:15  tigital
  28  * byte-swapping changes for bigendian systems
  29  *
  30  * Revision 1.10  2003/08/03 16:10:30  taylor
  31  * cleanup; compile warning fixes
  32  *
  33  * Revision 1.9  2002/07/27 19:52:54  relnev
  34  * add missing structure packing
  35  *
  36  * Revision 1.8  2002/06/09 04:41:24  relnev
  37  * added copyright header
  38  *
  39  * Revision 1.7  2002/06/02 05:31:17  relnev
  40  * unstub
  41  *
  42  * Revision 1.6  2002/06/02 02:29:39  relnev
  43  * net fixes
  44  *
  45  * Revision 1.5  2002/05/27 04:04:43  relnev
  46  * 155 undefined references left
  47  *
  48  * Revision 1.4  2002/05/26 21:27:53  theoddone33
  49  * More progress (I hate psnet2)
  50  *
  51  * Revision 1.3  2002/05/26 20:49:54  theoddone33
  52  * More progress
  53  *
  54  * Revision 1.2  2002/05/07 03:16:48  theoddone33
  55  * The Great Newline Fix
  56  *
  57  * Revision 1.1.1.1  2002/05/03 03:28:10  root
  58  * Initial import.
  59  *
  60  *
  61  * 25    9/14/99 2:21p Dave
  62  * Fixed observer mode joining and ingame stuff.
  63  *
  64  * 24    9/10/99 9:44p Dave
  65  * Bumped version # up. Make server reliable connects not have such a huge
  66  * timeout.
  67  *
  68  * 23    9/07/99 4:01p Dave
  69  * Fixed up a string.tbl paroblem (self destruct message). Make sure IPX
  70  * does everything properly (setting up address when binding). Remove
  71  * black rectangle background from UI_INPUTBOX.
  72  *
  73  * 22    8/26/99 8:51p Dave
  74  * Gave multiplayer TvT messaging a heavy dose of sanity. Cheat codes.
  75  *
  76  * 21    8/16/99 4:06p Dave
  77  * Big honking checkin.
  78  *
  79  * 20    7/26/99 5:50p Dave
  80  * Revised ingame join. Better? We'll see....
  81  *
  82  * 19    7/20/99 1:49p Dave
  83  * Peter Drake build. Fixed some release build warnings.
  84  *
  85  * 18    7/15/99 9:20a Andsager
  86  * FS2_DEMO initial checkin
  87  *
  88  * 17    7/03/99 4:08p Dave
  89  * Fixed wss_slots size issues. Fixed potentially nasty bug in low level
  90  * reliable code.
  91  *
  92  * 16    6/25/99 5:02p Jasenw
  93  * Removed old debug code.
  94  *
  95  * 15    6/07/99 9:51p Dave
  96  * Consolidated all multiplayer ports into one.
  97  *
  98  * 14    4/30/99 12:18p Dave
  99  * Several minor bug fixes.
 100  *
 101  * 13    4/27/99 5:55p Dave
 102  * Fixed Ras_connected bug with VSDK code.
 103  *
 104  * 12    4/27/99 2:59p Dave
 105  * Potential fix for reliable socket connection problem.
 106  *
 107  * 11    4/23/99 11:07a Dave
 108  * Added lots of debug multi.log output to psnet2
 109  *
 110  * 10    4/12/99 10:07p Dave
 111  * Made network startup more forgiving. Added checkmarks to dogfight
 112  * screen for players who hit commit.
 113  *
 114  * 9     3/10/99 6:50p Dave
 115  * Changed the way we buffer packets for all clients. Optimized turret
 116  * fired packets. Did some weapon firing optimizations.
 117  *
 118  * 8     3/09/99 6:24p Dave
 119  * More work on object update revamping. Identified several sources of
 120  * unnecessary bandwidth.
 121  *
 122  * 7     3/08/99 7:03p Dave
 123  * First run of new object update system. Looks very promising.
 124  *
 125  * 6     1/24/99 11:37p Dave
 126  * First full rev of beam weapons. Very customizable. Removed some bogus
 127  * Int3()'s in low level net code.
 128  *
 129  * 5     1/06/99 2:24p Dave
 130  * Stubs and release build fixes.
 131  *
 132  * 4     11/20/98 11:16a Dave
 133  * Fixed up IPX support a bit. Making sure that switching modes and
 134  * loading/saving pilot files maintains proper state.
 135  *
 136  * 3     11/19/98 4:19p Dave
 137  * Put IPX sockets back in psnet. Consolidated all multiplayer config
 138  * files into one.
 139  *
 140  * 2     11/19/98 8:04a Dave
 141  * Full support for D3-style reliable sockets. Revamped packet lag/loss
 142  * system, made it receiver side and at the lowest possible level.
 143  *
 144  * $NoKeywords: $
 145  */
 146
 147 #ifndef PLAT_UNIX
 148 #include <windows.h>
 149 #include <windowsx.h>
 150 #include <winsock.h>
 151 #include <wsipx.h>
 152 #include <process.h>
 153 #include <ras.h>
 154 #include <raserror.h>
 155 #else
 156 #include <sys/types.h>
 157 #include <sys/socket.h>
 158 #include <netinet/in.h>
 159 #include <arpa/inet.h>
 160 #include <netdb.h>
 161 #include <errno.h>
 162 #endif
 163 #include <stdio.h>
 164 #include <limits.h>
 165
 166 #include "pstypes.h"
 167 #include "psnet.h"
 168 #include "multi.h"
 169 #include "multiutil.h"
 170 #include "multilag.h"
 171 #include "osregistry.h"
 172 #include "timer.h"
 173 #include "multi_log.h"
 174 #include "multi_rate.h"
 175 #include "cmdline.h"
 176
 177 #ifdef PSNET2
 178
 179 // -------------------------------------------------------------------------------------------------------
 180 // PSNET 2 DEFINES/VARS
 181 //
 182
 183 int             Psnet_my_addr_valid;
 184 net_addr_t Psnet_my_addr;
 185
 186 ubyte Null_address[6];
 187
 188 int Socket_type;
 189 int Can_broadcast;                      // can we do broadcasting on our socket?
 190 int Ipx_can_broadcast = 0;
 191 int Tcp_can_broadcast = 0;
 192
 193 int Tcp_active = 0;
 194 int Ipx_active = 0;
 195
 196 int Network_status;
 197 int Tcp_failure_code = 0;
 198 int Ipx_failure_code = 0;
 199 int Ras_connected;
 200 int Psnet_connection;
 201
 202 ushort  Psnet_default_port;
 203
 204 // specified their internet connnection type
 205 #define NETWORK_CONNECTION_NONE                 1
 206 #define NETWORK_CONNECTION_DIALUP               2
 207 #define NETWORK_CONNECTION_LAN                  3
 208
 209 // defines and variables to indicate network connection status
 210 #define NETWORK_STATUS_NOT_INITIALIZED  1
 211 #define NETWORK_STATUS_NO_WINSOCK               2                       // winsock failed to initialize
 212 #define NETWORK_STATUS_NO_PROTOCOL              3                       // TCP/IP doesn't appear to be loaded
 213 #define NETWORK_STATUS_NO_RELIABLE              4
 214 #define NETWORK_STATUS_RUNNING                  5                       // everything should be running
 215
 216 // defintion of structures that actually leave this machine.  psnet_send give us only
 217 // the data that we want to send.  We will add a header onto this data (packet sequence
 218 // number, possibly a checksum).  We must include a 2 byte flags variable into both structure
 219 // since the receiving end of this packet must know whether or not to checksum the packet.
 220
 221 #define MAX_TOP_LAYER_PACKET_SIZE                       680
 222
 223 // use the pack pragma to pack these structures to 2 byte aligment.  Really only needed for
 224 // the naked packet.
 225 #define MAX_PACKET_BUFFERS              75
 226
 227 #ifndef PLAT_UNIX
 228 #pragma pack(push, 2)
 229 #endif
 230
 231 // definition for a non-checksum packet
 232 typedef struct network_packet
 233 {
 234         int             sequence_number;
 235         ushort  flags;
 236         ubyte           data[MAX_TOP_LAYER_PACKET_SIZE];
 237 } network_naked_packet;
 238
 239 // structure definition for our packet buffers
 240 typedef struct network_packet_buffer
 241 {
 242         int             sequence_number;
 243         int             len;
 244         net_addr_t      from_addr;
 245         ubyte           data[MAX_TOP_LAYER_PACKET_SIZE];
 246 } network_packet_buffer;
 247
 248 // struct for a bunch of network packet buffers
 249 typedef struct network_packet_buffer_list {
 250         network_packet_buffer psnet_buffers[MAX_PACKET_BUFFERS];
 251         int psnet_seq_number;
 252         int psnet_lowest_id;
 253         int psnet_highest_id;
 254 } network_packet_buffer_list;
 255
 256 #ifndef PLAT_UNIX
 257 #pragma pack(pop)
 258 #endif
 259
 260
 261 #define MAXHOSTNAME                     128
 262
 263 #define MAX_RECEIVE_BUFSIZE     4096    // 32 K, eh?
 264 #define MAX_SEND_RETRIES                20                      // number of retries when sending would block
 265 #define MAX_LINGER_TIME                 0                       // in seconds -- when lingering to close a socket
 266
 267 //Reliable UDP stuff
 268 //*******************************
 269 #define MAXNETBUFFERS                   150             // Maximum network buffers (For between network and upper level functions, which is
 270                                                                                                         // required in case of out of order packets
 271 #define NETRETRYTIME                            0.75f           // Time after sending before we resend
 272 #define MIN_NET_RETRYTIME               0.2f
 273 #define NETTIMEOUT                              30                      // Time after receiving the last packet before we drop that user
 274 #define NETHEARTBEATTIME                3                       // How often to send a heartbeat
 275 #define MAXRELIABLESOCKETS              40                      // Max reliable sockets to open at once...
 276 #define NETBUFFERSIZE                   600             // Max size of a network packet
 277
 278 #define RELIABLE_CONNECT_TIME           7               // how long we'll wait for a response when doing a reliable connect
 279
 280 int Nettimeout = NETTIMEOUT;
 281
 282 // Reliable packet stuff
 283 #define RNT_ACK                         1                               // ACK Packet
 284 #define RNT_DATA                                2                               // Data Packet
 285 #define RNT_DATA_COMP           3                               // Compressed Data Packet
 286 #define RNT_REQ_CONN                    4                               // Requesting a connection
 287 #define RNT_DISCONNECT          5                               // Disconnecting a connection
 288 #define RNT_HEARTBEAT           6                               // Heartbeat -- send every NETHEARTBEATTIME
 289 #define RNT_I_AM_HERE           7
 290
 291 #ifndef PLAT_UNIX
 292 #pragma pack(push,r_udp)
 293 #pragma pack(1)
 294 #define PACKED
 295 #else
 296 #define PACKED __attribute__((packed))
 297 #endif
 298
 299 typedef struct {
 300         ubyte                   type;                                   // packet type
 301         ubyte                   compressed;                     //
 302         ushort          seq;                                    // sequence packet 0-65535 used for ACKing also
 303         ushort          data_len;                       // length of data
 304         float                   send_time;                      // Time the packet was sent, if an ACK the time the packet being ACK'd was sent.
 305         ubyte           data[NETBUFFERSIZE];    // Packet data
 306 } PACKED reliable_header;
 307
 308 #define RELIABLE_PACKET_HEADER_ONLY_SIZE (sizeof(reliable_header)-NETBUFFERSIZE)
 309 #define MAX_PING_HISTORY        10
 310
 311 typedef struct {
 312         ubyte buffer[NETBUFFERSIZE];
 313
 314 } PACKED reliable_net_sendbuffer;
 315
 316 typedef struct {
 317         ubyte buffer[NETBUFFERSIZE];
 318 } PACKED reliable_net_rcvbuffer;
 319
 320 typedef struct {
 321         reliable_net_sendbuffer *sbuffers[MAXNETBUFFERS];       // This is an array of pointers for quick sorting
 322         unsigned short ssequence[MAXNETBUFFERS];                                // This is the sequence number of the given packet
 323         float timesent[MAXNETBUFFERS];
 324         int send_len[MAXNETBUFFERS];
 325         reliable_net_rcvbuffer  *rbuffers[MAXNETBUFFERS];
 326         int recv_len[MAXNETBUFFERS];
 327         unsigned short rsequence[MAXNETBUFFERS];                                // This is the sequence number of the given packet
 328         float last_packet_received;                                                             // For a given connection, this is the last packet we received
 329         float last_packet_sent;
 330         struct sockaddr addr;                                                                                                   // struct sockaddr of our peer
 331         ushort status;                                                                                                  // Status of this connection
 332         unsigned short oursequence;                                                             // This is the next sequence number the application is expecting
 333         unsigned short theirsequence;                                                           // This is the next sequence number the peer is expecting
 334         net_addr_t      net_addr;                                                                                       // A FS2 network address structure
 335         ubyte connection_type;                                                                          // IPX, IP, modem, etc.
 336         float pings[MAX_PING_HISTORY];
 337         ubyte ping_pos;
 338         unsigned int num_ping_samples;
 339         float mean_ping;
 340 } reliable_socket;
 341
 342 reliable_socket Reliable_sockets[MAXRELIABLESOCKETS];
 343
 344 // sockets for IPX and TCP (unreliable)
 345 SOCKET IPX_socket;
 346 SOCKET TCP_socket;
 347
 348 // the sockets that the game will use when selecting network type
 349 SOCKET Unreliable_socket = INVALID_SOCKET;
 350
 351 // blah
 352 // SOCKET Reliable_UDP_socket = INVALID_SOCKET;
 353 // SOCKET Reliable_IPX_socket = INVALID_SOCKET;
 354
 355 float First_sent_iamhere = 0;
 356 float Last_sent_iamhere = 0;
 357
 358 #define CONNECTSEQ 0x142                                                                                // Magic number for starting a connection, just so it isn't 0
 359
 360 unsigned int Serverconn = 0xffffffff;
 361
 362 #ifndef PLAT_UNIX
 363 #pragma pack(pop,r_udp)
 364 #endif
 365 #undef PACKED
 366
 367 //*******************************
 368
 369 // top layer buffers
 370 network_packet_buffer_list Psnet_top_buffers[PSNET_NUM_TYPES];
 371
 372 // -------------------------------------------------------------------------------------------------------
 373 // PSNET 2 FORWARD DECLARATIONS
 374 //
 375
 376 // if the string is a legally formatted ip string
 377 int psnet_is_valid_numeric_ip(char *ip);
 378
 379 // functions to get the status of a RAS connection
 380 unsigned int psnet_ras_status();
 381
 382 // set some options on a socket
 383 void psnet_socket_options( SOCKET sock );
 384
 385 // initialize ipx socket
 386 int psnet_init_ipx();
 387
 388 // initialize tcp socket
 389 int psnet_init_tcp();
 390
 391 // get time in seconds
 392 float psnet_get_time();
 393
 394 // returns the ip address of this machine. use for calling bind() with to associate with the proper
 395 // IP address and network device.
 396 int psnet_get_ip();
 397
 398 // initialize reliable sockets
 399 int psnet_init_rel_tcp(int port, int should_listen);
 400 int psnet_init_rel_ipx(int port, int should_listen);
 401
 402 // shutdown reliable sockets
 403 void psnet_rel_close();
 404
 405 // initialize the buffering system
 406 void psnet_buffer_init(network_packet_buffer_list *l);
 407
 408 // buffer a packet (maintain order!)
 409 void psnet_buffer_packet(network_packet_buffer_list *l, ubyte *data, int length, net_addr_t *from);
 410
 411 // get the index of the next packet in order!
 412 int psnet_buffer_get_next(network_packet_buffer_list *l, ubyte *data, int *length, net_addr_t *from);
 413
 414
 415 // -------------------------------------------------------------------------------------------------------
 416 // PSNET 2 TOP LAYER FUNCTIONS - these functions simply buffer and store packets based upon type (see PSNET_TYPE_* defines)
 417 //
 418
 419 // wrappers around select() and recvfrom() for lagging/losing data
 420 int RECVFROM(SOCKET s, char *buf, int len, int flags, sockaddr *from, int *fromlen, int psnet_type)
 421 {
 422         network_packet_buffer_list *l;
 423         net_addr_t addr;
 424         int ret;
 425         int ret_len;
 426
 427         // bad type
 428         SDL_assert((psnet_type >= 0) && (psnet_type < PSNET_NUM_TYPES));
 429         if((psnet_type < 0) || (psnet_type >= PSNET_NUM_TYPES)){
 430                 return -1;
 431         }
 432         l = &Psnet_top_buffers[psnet_type];
 433
 434         // if we have no buffer! The user should have made sure this wasn't the case by calling SELECT()
 435         ret = psnet_buffer_get_next(l, (ubyte*)buf, &ret_len, &addr);
 436         if(!ret){
 437                 Int3();
 438                 return -1;
 439         }
 440
 441         // otherwise, stuff the outgoing data
 442         switch ( Socket_type ) {
 443         case NET_IPX:
 444 #ifdef PLAT_UNIX
 445                 STUB_FUNCTION;
 446 #else
 447                 ((SOCKADDR_IPX*)from)->sa_socket = htons(addr.port);
 448                 memcpy(((SOCKADDR_IPX*)from)->sa_nodenum, addr.addr, 6);
 449                 memcpy(((SOCKADDR_IPX*)from)->sa_netnum, addr.net_id, 4);
 450                 ((SOCKADDR_IPX*)from)->sa_family = AF_IPX;
 451                 *fromlen = sizeof(SOCKADDR_IPX);
 452 #endif
 453                 break;
 454
 455         case NET_TCP:
 456                 ((struct sockaddr_in*)from)->sin_port = htons(addr.port);
 457 #ifdef PLAT_UNIX
 458                 memcpy(&((struct sockaddr_in*)from)->sin_addr.s_addr, addr.addr, 4);
 459 #else
 460                 memcpy(&((struct sockaddr_in*)from)->sin_addr.S_un.S_addr, addr.addr, 4);
 461 #endif
 462                 ((struct sockaddr_in*)from)->sin_family = AF_INET;
 463                 *fromlen = sizeof(struct sockaddr_in);
 464                 break;
 465
 466         default:
 467                 SDL_assert(0);
 468                 break;
 469         }
 470
 471         // return bytes read
 472         return ret_len;
 473 }
 474
 475 #ifdef PLAT_UNIX
 476 #define FAR
 477 #endif
 478 // wrappers around select() and recvfrom() for lagging/losing data
 479 int SELECT(int nfds, fd_set FAR * readfds, fd_set FAR * writefds, fd_set FAR * exceptfds, struct timeval FAR * timeout, int psnet_type)
 480 {
 481         network_packet_buffer_list *l;
 482
 483         // if this is a check for writability, just return the select
 484         if(writefds != NULL){
 485                 return select(nfds, readfds, writefds, exceptfds, timeout);
 486         }
 487
 488         // bad type
 489         SDL_assert((psnet_type >= 0) && (psnet_type < PSNET_NUM_TYPES));
 490         if((psnet_type < 0) || (psnet_type >= PSNET_NUM_TYPES)){
 491                 return -1;
 492         }
 493         l = &Psnet_top_buffers[psnet_type];
 494
 495         // do we have any buffers in here?
 496         if((l->psnet_lowest_id == -1) || (l->psnet_lowest_id > l->psnet_highest_id)){
 497                 return 0;
 498         }
 499
 500         // yo
 501         return 1;
 502 }
 503
 504 // wrappers around sendto to sorting through different packet types
 505 int SENDTO(SOCKET s, char * buf, int len, int flags, sockaddr *to, int tolen, int psnet_type)
 506 {
 507         char outbuf[MAX_TOP_LAYER_PACKET_SIZE + 150];
 508
 509         // stuff type
 510         outbuf[0] = (char)psnet_type;
 511         memcpy(&outbuf[1], buf, len);
 512
 513         // is the socket writeable?
 514
 515         // send it
 516         return sendto(s, outbuf, len + 1, flags, (struct sockaddr*)to, tolen);
 517 }
 518
 519 // call this once per frame to read everything off of our socket
 520 void PSNET_TOP_LAYER_PROCESS()
 521 {
 522         // read socket stuff
 523         struct sockaddr_in ip_addr;                             // UDP/TCP socket structure
 524 #ifndef PLAT_UNIX
 525         SOCKADDR_IPX ipx_addr;                  // IPX socket structure
 526 #endif
 527         fd_set  rfds;
 528         timeval timeout;
 529         int read_len;
 530 #ifndef PLAT_UNIX
 531         int from_len;
 532 #else
 533         socklen_t from_len;
 534 #endif
 535         net_addr_t      from_addr;
 536         network_naked_packet packet_read;
 537
 538         // clear the addresses to remove compiler warnings
 539         memset(&ip_addr, 0, sizeof(struct sockaddr_in));
 540 #ifndef PLAT_UNIX
 541         memset(&ipx_addr, 0, sizeof(SOCKADDR_IPX));
 542 #endif
 543
 544         if ( Network_status != NETWORK_STATUS_RUNNING ) {
 545                 ml_printf("Network ==> socket not inited in PSNET_TOP_LAYER_PROCESS\n");
 546                 return;
 547         }
 548
 549         while ( 1 ) {
 550                 // check if there is any data on the socket to be read.  The amount of data that can be
 551                 // atomically read is stored in len.
 552
 553                 FD_ZERO(&rfds);
 554                 FD_SET( Unreliable_socket, &rfds );
 555                 timeout.tv_sec = 0;
 556                 timeout.tv_usec = 0;
 557
 558 #ifndef PLAT_UNIX
 559                 if ( select( -1, &rfds, NULL, NULL, &timeout) == SOCKET_ERROR ) {
 560 #else
 561                 if ( select( Unreliable_socket+1, &rfds, NULL, NULL, &timeout) == SOCKET_ERROR ) {
 562 #endif
 563                         ml_printf("Error %d doing a socket select on read\n", WSAGetLastError());
 564                         break;
 565                 }
 566
 567                 // if the read file descriptor is not set, then bail!
 568                 if ( !FD_ISSET(Unreliable_socket, &rfds) ){
 569                         return;
 570                 }
 571
 572                 // get data off the socket and process
 573                 read_len = SOCKET_ERROR;
 574                 switch ( Socket_type ) {
 575                 case NET_IPX:
 576 #ifndef PLAT_UNIX
 577                         from_len = sizeof(SOCKADDR_IPX);
 578                         read_len = recvfrom( Unreliable_socket, (char*)packet_read.data, MAX_TOP_LAYER_PACKET_SIZE, 0,  (struct sockaddr*)&ipx_addr, &from_len);
 579 #endif
 580                         break;
 581
 582                 case NET_TCP:
 583                         from_len = sizeof(struct sockaddr_in);
 584                         read_len = recvfrom( Unreliable_socket, (char*)packet_read.data, MAX_TOP_LAYER_PACKET_SIZE, 0,  (struct sockaddr*)&ip_addr, &from_len);
 585                         break;
 586
 587                 default:
 588                         SDL_assert(0);
 589                         return;
 590                 }
 591
 592                 // set the from_addr for storage into the packet buffer structure
 593                 from_addr.type = Socket_type;
 594
 595                 switch ( Socket_type ) {
 596                 case NET_IPX:
 597 #ifndef PLAT_UNIX
 598                         from_addr.port = ntohs( ipx_addr.sa_socket );
 599                         memcpy(from_addr.addr, ipx_addr.sa_nodenum, 6 );
 600                         memcpy(from_addr.net_id, ipx_addr.sa_netnum, 4 );
 601 #endif
 602                         break;
 603
 604                 case NET_TCP:
 605                         from_addr.port = ntohs( ip_addr.sin_port );
 606                         memset(from_addr.addr, 0x00, 6);
 607 #ifndef PLAT_UNIX
 608                         memcpy(from_addr.addr, &ip_addr.sin_addr.S_un.S_addr, 4);
 609 #else
 610                         memcpy(from_addr.addr, &ip_addr.sin_addr.s_addr, 4);
 611 #endif
 612                         break;
 613
 614                 default:
 615                         SDL_assert(0);
 616                         return;
 617                         // break;
 618                 }
 619
 620                 if ( read_len == SOCKET_ERROR ) {
 621                         // int x = WSAGetLastError();
 622                         ml_printf("Socket error on socket_get_data()");
 623                         break;
 624                 }
 625
 626                 // determine the packet type
 627                 int packet_type = packet_read.data[0];
 628                 // mprintf(("TOP LAYER PACKET  %d!\n", packet_type));
 629                 if((packet_type < 0) || (packet_type >= PSNET_NUM_TYPES)){
 630                         Int3();
 631                 } else {
 632                         // buffer the packet
 633                         psnet_buffer_packet(&Psnet_top_buffers[packet_type], packet_read.data + 1, read_len - 1, &from_addr);
 634                 }
 635         }
 636 }
 637
 638
 639 // -------------------------------------------------------------------------------------------------------
 640 // PSNET 2 FUNCTIONS
 641 //
 642
 643 // initialize psnet to use the specified port
 644 void psnet_init( int protocol, int port_num )
 645 {
 646         const char *internet_connection;
 647 #ifndef PLAT_UNIX
 648         WSADATA wsa_data;
 649 #endif
 650         int idx;
 651         Tcp_active = 0;
 652         Ipx_active = 0;
 653
 654 #if defined(DEMO) || defined(OEM_BUILD) // not for FS2_DEMO
 655         return;
 656 #endif
 657
 658         // GAME PORT INITIALIZATION STUFF
 659         if ( Network_status == NETWORK_STATUS_RUNNING ){
 660                 ml_string("Skipping psnet_init() because network already running");
 661                 return;
 662         }
 663
 664         internet_connection = os_config_read_string(NULL, "NetworkConnection", "none");
 665         if ( !SDL_strcasecmp(internet_connection, NOX("dialup")) ) {
 666                 ml_string("psnet_init() detected dialup connection");
 667
 668                 Psnet_connection = NETWORK_CONNECTION_DIALUP;
 669         } else if ( !SDL_strcasecmp(internet_connection, NOX("lan")) ) {
 670                 ml_string("psnet_init() detected lan connection");
 671
 672                 Psnet_connection = NETWORK_CONNECTION_LAN;
 673         } else {
 674                 ml_string("psnet_init() detected no connection");
 675
 676                 Psnet_connection = NETWORK_CONNECTION_NONE;
 677         }
 678
 679         Network_status = NETWORK_STATUS_NO_WINSOCK;
 680 #ifndef PLAT_UNIX
 681         if (WSAStartup(0x101, &wsa_data )){
 682                 return;
 683         }
 684 #endif
 685
 686         // get the port for running this game on.  Be careful that it cannot be out of bounds
 687         Psnet_default_port = DEFAULT_GAME_PORT;
 688         if ( (port_num > 1023) && (port_num < USHRT_MAX) ) {
 689                 Psnet_default_port = (ushort)port_num;
 690         }
 691
 692         // initialize TCP now
 693         Tcp_active = 1;
 694         if(!psnet_init_tcp()){
 695                 ml_printf("Error on TCP startup %d\n", Tcp_failure_code);
 696
 697                 Tcp_active = 0;
 698         } else {
 699                 if(!psnet_init_rel_tcp(Psnet_default_port + 1, 0)){
 700                         ml_printf("Network", "Error on TCP startup %d\n", Tcp_failure_code);
 701
 702                         Tcp_active = 0;
 703                 }
 704         }
 705
 706         // clear reliable sockets
 707         reliable_socket *rsocket;
 708         int j;
 709         for(j=0; j<MAXRELIABLESOCKETS; j++){
 710                 rsocket=&Reliable_sockets[j];
 711                 memset(rsocket,0,sizeof(reliable_socket));
 712         }
 713
 714         // initialize IPX not
 715 #ifndef PLAT_UNIX
 716         Ipx_active = 1;
 717         if(!psnet_init_ipx()){
 718                 ml_printf("Network", "Error on IPX startup %d\n", Ipx_failure_code);
 719
 720                 Ipx_active = 0;
 721         } else {
 722                 if(!psnet_init_rel_ipx(Psnet_default_port + 1, 0)){
 723                         ml_printf("Network", "Error on IPX startup %d\n", Ipx_failure_code);
 724
 725                         Ipx_active = 0;
 726                 }
 727         }
 728 #else
 729         Ipx_active = 0;
 730 #endif
 731
 732         // determine if we've successfully initialized the protocol we want
 733         if(!Tcp_active && !Ipx_active){
 734                 Network_status = NETWORK_STATUS_NO_PROTOCOL;
 735
 736                 ml_string("No protocol in psnet_init()!");
 737         }
 738
 739         // specified network timeout
 740         Nettimeout = NETTIMEOUT;
 741         if(Cmdline_timeout > 0){
 742                 Nettimeout = Cmdline_timeout;
 743         }
 744
 745         // set ras status
 746         psnet_ras_status();
 747
 748         if(Network_status != NETWORK_STATUS_NO_PROTOCOL){
 749                 // set network to be running
 750                 Network_status = NETWORK_STATUS_RUNNING;
 751
 752                 // determine if our socket can broadcast
 753                 Can_broadcast = Tcp_can_broadcast || Ipx_can_broadcast;
 754
 755                 // initialize all packet type buffers
 756                 for(idx=0; idx<PSNET_NUM_TYPES; idx++){
 757                         psnet_buffer_init(&Psnet_top_buffers[idx]);
 758                 }
 759         }
 760 }
 761
 762 // shutdown psnet
 763 void psnet_close()
 764 {
 765         if ( Network_status != NETWORK_STATUS_RUNNING ){
 766                 return;
 767         }
 768
 769 #ifndef PLAT_UNIX
 770         WSACancelBlockingCall();
 771 #endif
 772
 773         if ( TCP_socket != (int)INVALID_SOCKET ) {
 774                 shutdown( TCP_socket, 1 );
 775                 closesocket( TCP_socket );
 776         }
 777
 778         if ( IPX_socket != (int)INVALID_SOCKET ) {
 779                 shutdown( IPX_socket, 1 );
 780                 closesocket( IPX_socket );
 781         }
 782
 783 #ifndef PLAT_UNIX
 784         if (WSACleanup())       {
 785                 //Warning( LOCATION, "Error closing wsock!\n" );
 786         }
 787 #endif
 788
 789         // close down all reliable sockets - this forces them to
 790         // send a disconnect to any remote machines
 791         psnet_rel_close();
 792
 793         Network_status = NETWORK_STATUS_NOT_INITIALIZED;
 794 }
 795
 796 // set the protocol to use
 797 int psnet_use_protocol( int protocol )
 798 {
 799 #ifndef PLAT_UNIX
 800         int len;
 801         SOCKADDR_IPX    ipx_addr;
 802 #else
 803         socklen_t len;
 804 #endif
 805         struct sockaddr_in              ip_addr;
 806
 807         // zero out my address
 808         Psnet_my_addr_valid = 0;
 809         memset( &Psnet_my_addr, 0, sizeof(Psnet_my_addr) );
 810
 811         // wait until we choose a protocol to determine if we can broadcast
 812         Can_broadcast = 0;
 813
 814         ml_string("In psnet_use_protocol()");
 815
 816         switch ( protocol ) {
 817         case NET_IPX:
 818 #ifndef PLAT_UNIX
 819                 ml_string("psnet_use_protocol() selecting IPX");
 820
 821                 // assign the IPX_* sockets to the socket values used elsewhere
 822                 Unreliable_socket = IPX_socket;
 823
 824                 Can_broadcast = Ipx_can_broadcast;
 825                 if(Can_broadcast){
 826                         ml_printf("Psnet : IPX broadcast\n");
 827                 }
 828
 829                 // get the socket name for the IPX_socket, and put it into My_addr
 830                 len = sizeof(SOCKADDR_IPX);
 831                 if ( getsockname(IPX_socket, (struct sockaddr *)&ipx_addr, &len) == SOCKET_ERROR ) {
 832                         ml_printf("Unable to get sock name for IPX unreliable socket (%d)\n", WSAGetLastError() );
 833                         return 0;
 834                 }
 835
 836                 memcpy(Psnet_my_addr.net_id, ipx_addr.sa_netnum, 4);
 837                 memcpy(Psnet_my_addr.addr, ipx_addr.sa_nodenum, 6);
 838                 Psnet_my_addr.port = Psnet_default_port;
 839
 840                 ml_printf("Psnet using - NET_IPX\n");
 841 #endif
 842                 break;
 843
 844         case NET_TCP:
 845                 if ( Network_status != NETWORK_STATUS_RUNNING ){
 846                         ml_string("Network_status != NETWORK_STATUS_RUNNING in NET_TCP in psnet_use_protocol()");
 847                         return 0;
 848                 }
 849
 850                 // assign the TCP_* sockets to the socket values used elsewhere
 851                 Unreliable_socket = TCP_socket;
 852
 853                 Can_broadcast = Tcp_can_broadcast;
 854                 if(Can_broadcast){
 855                         ml_printf("Psnet : TCP broadcast\n");
 856                 }
 857
 858                 // get the socket name for the IPX_socket, and put it into My_addr
 859                 len = sizeof(struct sockaddr_in);
 860                 if ( getsockname(TCP_socket, (struct sockaddr *)&ip_addr, &len) == SOCKET_ERROR ) {
 861                         ml_printf("Unable to get sock name for TCP unreliable socket (%d)\n", WSAGetLastError() );
 862
 863                         return 0;
 864                 }
 865
 866                 memset(Psnet_my_addr.net_id, 0, 4);
 867                 memcpy(Psnet_my_addr.addr, &ip_addr.sin_addr, 6);
 868                 Psnet_my_addr.port = Psnet_default_port;
 869
 870                 ml_printf("Psnet using - NET_TCP\n");
 871                 break;
 872
 873         default:
 874                 Int3();
 875                 return 0;
 876         }
 877
 878         Psnet_my_addr.type = protocol;
 879         Socket_type = protocol;
 880
 881         return 1;
 882 }
 883
 884 // get the status of the network
 885 int psnet_get_network_status()
 886 {
 887         // first case is when "none" is selected
 888         if ( Psnet_connection == NETWORK_CONNECTION_NONE ) {
 889                 return NETWORK_ERROR_NO_TYPE;
 890         }
 891
 892         // first, check the connection status of the network
 893         if ( Network_status == NETWORK_STATUS_NO_WINSOCK )
 894                 return NETWORK_ERROR_NO_WINSOCK;
 895
 896         if ( Network_status == NETWORK_STATUS_NO_PROTOCOL ){
 897                 return NETWORK_ERROR_NO_PROTOCOL;
 898         }
 899
 900         // network is running -- be sure that the RAS people know to connect if they currently cannot.
 901
 902         if ( Psnet_connection == NETWORK_CONNECTION_DIALUP ) {
 903                 // if on a dialup connection, be sure that RAS is active.
 904                 if ( !Ras_connected ) {
 905                         return NETWORK_ERROR_CONNECT_TO_ISP;
 906                 }
 907         } else if ( Psnet_connection == NETWORK_CONNECTION_LAN ) {
 908                 // if on a LAN, and they have a dialup connection active, return error to indicate that they need
 909                 // to pick the right connection type
 910                 if ( Ras_connected ) {
 911                         return NETWORK_ERROR_LAN_AND_RAS;
 912                 }
 913         }
 914         return NETWORK_ERROR_NONE;
 915 }
 916
 917 // convert a net_addr to a string
 918 char* psnet_addr_to_string( char * text, const int max_textlen, net_addr_t * address )
 919 {
 920
 921         if ( Network_status != NETWORK_STATUS_RUNNING )         {
 922                 SDL_strlcpy( text, XSTR("[no networking]",910), max_textlen );
 923                 return text;
 924         }
 925
 926         in_addr temp_addr;
 927
 928         switch ( address->type ) {
 929                 case NET_IPX:
 930                         SDL_snprintf(text, max_textlen, "%x %x %x %x: %x %x %x %x %x %x", address->net_id[0],
 931                                                                                                                                                         address->net_id[1],
 932                                                                                                                                                         address->net_id[2],
 933                                                                                                                                                         address->net_id[3],
 934                                                                                                                                                         address->addr[0],
 935                                                                                                                                                         address->addr[1],
 936                                                                                                                                                         address->addr[2],
 937                                                                                                                                                         address->addr[3],
 938                                                                                                                                                         address->addr[4],
 939                                                                                                                                                         address->addr[5]);
 940                         break;
 941
 942                 case NET_TCP:
 943                         memcpy(&temp_addr.s_addr, address->addr, 4);
 944                         SDL_strlcpy( text, inet_ntoa(temp_addr), max_textlen );
 945                         break;
 946
 947                 default:
 948                         // SDL_assert(0);
 949                         break;
 950
 951         } // end switch
 952
 953         return text;
 954 }
 955
 956 // convert a string to a net addr
 957 void psnet_string_to_addr( net_addr_t * address, char * text, const int max_textlen )
 958 {
 959         struct hostent *he;
 960         char str[255], *c, *port;
 961         in_addr addr;
 962
 963         if ( Network_status != NETWORK_STATUS_RUNNING ) {
 964                 SDL_strlcpy( text, XSTR("[no networking]",910), max_textlen );
 965                 return;
 966         }
 967
 968         // copy the text string to local storage to look for ports
 969         SDL_assert( strlen(text) < 255 );
 970         SDL_strlcpy(str, text, sizeof(str));
 971         c = strrchr(str, ':');
 972         port = NULL;
 973         if ( c ) {
 974                 *c = '\0';
 975                 port = c+1;
 976         }
 977
 978         switch ( address->type ) {
 979                 case NET_IPX:
 980                         Int3();         // no support for this yet
 981                         break;
 982
 983                 case NET_TCP:
 984                         addr.s_addr = inet_addr(str);
 985                         // if we get INADDR_NONE returns, then we need to try and resolve the host
 986                         // name
 987                         if ( addr.s_addr == INADDR_NONE ) {
 988                                 he = gethostbyname( str );
 989                                 // returns a non-null pointer if successful, so get the address
 990                                 if ( he ) {
 991                                         addr.s_addr = ((in_addr *)(he->h_addr))->s_addr;                        // this is the address in network byte order
 992                                 } else {
 993                                         addr.s_addr = INADDR_NONE;
 994                                 }
 995                         }
 996
 997                         memset(address->addr, 0x00, 6);
 998                         memcpy(address->addr, &addr.s_addr, 4);
 999                         if ( port ){
1000                                 address->port = (ushort)(atoi(port));
1001                         }
1002                         break;
1003
1004                 default:
1005                         SDL_assert(0);
1006                         break;
1007
1008         } // end switch
1009 }
1010
1011 // compare 2 addresses
1012 int psnet_same( net_addr_t * a1, net_addr_t * a2 )
1013 {
1014         return !memcmp(a1->addr, a2->addr, 6);
1015 }
1016
1017 // send data unreliably
1018 int psnet_send( net_addr_t * who_to, void * data, int len, int np_index )
1019 {
1020         // send data unreliably
1021         SOCKET send_sock;
1022         struct sockaddr_in sockaddr;                            // UDP/TCP socket structure
1023 #ifndef PLAT_UNIX
1024         SOCKADDR_IPX ipx_addr;                          // IPX socket structure
1025 #endif
1026         int ret, send_len;
1027         ubyte iaddr[6], *send_data;
1028         short port;
1029         fd_set  wfds;
1030         struct timeval timeout;
1031
1032         // always use the reliable socket
1033         send_sock = Unreliable_socket;
1034
1035         if ( Network_status != NETWORK_STATUS_RUNNING ) {
1036                 ml_printf("Network ==> Socket not inited in psnet_send\n");
1037                 return 0;
1038         }
1039
1040         if ( psnet_same( who_to, &Psnet_my_addr) ){
1041                 return 0;
1042         }
1043
1044         memset(iaddr, 0x00, 6);
1045         memcpy(iaddr, who_to->addr, 6);
1046
1047         if ( memcmp(iaddr, Null_address, 6) == 0) {
1048                 ml_printf("Network ==> send to address is 0 in psnet_send\n");
1049                 return 0;
1050         }
1051
1052         port = who_to->port;
1053
1054         if ( port == 0) {
1055                 ml_printf("Network ==> destination port %d invalid in psnet_send\n", port);
1056                 return 0;
1057         }
1058
1059         // stuff the data with the type
1060         send_data = (ubyte*)data;
1061         send_len = len;
1062
1063         FD_ZERO(&wfds);
1064         FD_SET( send_sock, &wfds );
1065         timeout.tv_sec = 0;
1066         timeout.tv_usec = 0;
1067
1068 #ifndef PLAT_UNIX
1069         if ( SELECT( -1, NULL, &wfds, NULL, &timeout, PSNET_TYPE_UNRELIABLE) == SOCKET_ERROR ) {
1070 #else
1071         if ( SELECT( send_sock+1, NULL, &wfds, NULL, &timeout, PSNET_TYPE_UNRELIABLE) == SOCKET_ERROR ) {
1072 #endif
1073                 ml_printf("Error on blocking select for write %d\n", WSAGetLastError() );
1074                 return 0;
1075         }
1076
1077         // if the write file descriptor is not set, then bail!
1078         if ( !FD_ISSET(send_sock, &wfds ) ){
1079                 return 0;
1080         }
1081
1082         ret = SOCKET_ERROR;
1083         switch ( who_to->type ) {
1084                 case NET_IPX:
1085 #ifndef PLAT_UNIX
1086                         ipx_addr.sa_socket = htons(port);
1087                         ipx_addr.sa_family = AF_IPX;
1088                         memcpy(ipx_addr.sa_nodenum, iaddr, 6);
1089                         memcpy(ipx_addr.sa_netnum, who_to->net_id, 4);
1090
1091                         ret = SENDTO(send_sock, (char *)send_data, send_len, 0, (struct sockaddr*)&ipx_addr, sizeof(ipx_addr), PSNET_TYPE_UNRELIABLE);
1092
1093                         multi_rate_add(np_index, "ipx", send_len);
1094                         if ( (ret != SOCKET_ERROR) && (ret != send_len) ){
1095                                 // ml_printf("requested to send %d bytes -- sent %d instead!!!\n", send_len, ret);
1096                         }
1097 #endif
1098                         break;
1099
1100                 case NET_TCP:
1101                         sockaddr.sin_family = AF_INET;
1102                         memcpy(&sockaddr.sin_addr.s_addr, iaddr, 4);
1103                         sockaddr.sin_port = htons(port);
1104
1105                         multi_rate_add(np_index, "udp(h)", send_len + UDP_HEADER_SIZE);
1106                         multi_rate_add(np_index, "udp", send_len);
1107                         ret = SENDTO( send_sock, (char *)send_data, send_len, 0, (struct sockaddr*)&sockaddr, sizeof(sockaddr), PSNET_TYPE_UNRELIABLE );
1108                         break;
1109
1110                 default:
1111                         SDL_assert(0);  // unknown protocol
1112                         break;
1113
1114         } // end switch
1115
1116         if ( ret != SOCKET_ERROR )      {
1117                 return 1;
1118         }
1119         //Warning( LOCATION, "Couldn't send data (0x%x)!\n", WSAGetLastError() );
1120         return 0;
1121 }
1122
1123 // get data from the unreliable socket
1124 int psnet_get( void * data, net_addr_t * from_addr )
1125 {
1126         int buffer_size;
1127
1128         // try and get a free buffer and return its size
1129         if(psnet_buffer_get_next(&Psnet_top_buffers[PSNET_TYPE_UNRELIABLE], (ubyte*)data, &buffer_size, from_addr)){
1130                 return buffer_size;
1131         }
1132
1133         // return nothing
1134         return 0;
1135 }
1136
1137 // broadcast data on unreliable socket
1138 int psnet_broadcast( net_addr_t * who_to, void * data, int len )
1139 {
1140         if ( Network_status != NETWORK_STATUS_RUNNING ) {
1141                 ml_printf("Network ==> Socket not inited in psnet_broadcast\n");
1142                 return 0;
1143         }
1144
1145         if ( !Can_broadcast ) {
1146                 ml_printf("Cannot broadcast -- returning without doing anything\n");
1147                 return 0;
1148         }
1149
1150         ubyte broadcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1151
1152         // broadcasting works on a local subnet which is all we really want to do for now anyway.
1153         // we might keep this in as an option for freespace later.
1154         switch ( who_to->type ) {
1155                 case NET_IPX:
1156                 case NET_TCP:
1157                         memcpy(who_to->addr, broadcast, 6);
1158                         psnet_send(who_to, data, len);
1159                         break;
1160
1161         } // end switch
1162
1163         return 1;
1164 }
1165
1166 // flush all sockets
1167 void psnet_flush()
1168 {
1169         ubyte data[MAX_TOP_LAYER_PACKET_SIZE + 250];
1170         net_addr_t from_addr;
1171
1172         while ( psnet_get( data, &from_addr ) > 0 ) ;
1173 }
1174
1175 // if the passed string is a valid IP string
1176 int psnet_is_valid_ip_string( char *ip_string, int allow_port )
1177 {
1178         in_addr addr;
1179         struct hostent *host_ent;
1180         char str[255], *c;
1181
1182         // our addresses may have ports, so make local copy and remove port number
1183         SDL_assert( strlen(ip_string) < 255 );
1184         SDL_strlcpy(str, ip_string, sizeof(str));
1185         c = strrchr(str, ':');
1186         if ( c ){
1187                 *c = '\0';
1188         }
1189
1190         addr.s_addr = inet_addr(ip_string);
1191         if ( addr.s_addr != INADDR_NONE ){
1192                 // make sure the ip string is a valid format string
1193                 if(psnet_is_valid_numeric_ip(ip_string)){
1194                         return 1;
1195                 }
1196         }
1197
1198         // try name resolution
1199         host_ent = gethostbyname( ip_string );
1200         if ( !host_ent ){
1201                 return 0;
1202         }
1203
1204         // valid host entry so return 1;
1205         return 1;
1206 }
1207
1208
1209 // -------------------------------------------------------------------------------------------------------
1210 // PSNET 2 RELIABLE SOCKET FUNCTIONS
1211 //
1212
1213 // compare 2 pings
1214 int psnet_rel_ping_compare( const void *arg1, const void *arg2 )
1215 {
1216         float *ping1 = (float *)arg1;
1217         float *ping2 = (float *)arg2;
1218
1219         if(*ping1==*ping2) return 0;
1220         else if(*ping1>*ping2) return 1;
1221         else if(*ping1<*ping2) return -1;
1222
1223         return 0;
1224 }
1225
1226 void psnet_rel_send_ack(struct sockaddr *raddr, unsigned int sig, ubyte link_type, float time_sent)
1227 {
1228         int sig_tmp;
1229         reliable_header ack_header;
1230         ack_header.type = RNT_ACK;
1231         ack_header.data_len = sizeof(unsigned int);
1232         ack_header.send_time = INTEL_FLOAT( time_sent );
1233         sig_tmp = INTEL_INT( sig );
1234         memcpy(&ack_header.data,&sig_tmp,sizeof(unsigned int));
1235         switch (link_type) {
1236         case NET_IPX:
1237                 if(!Ipx_active){
1238                         ml_string("No IPX in rel_send_ack()");
1239                         return;
1240                 }
1241                 SENDTO(Unreliable_socket, (char *)&ack_header, RELIABLE_PACKET_HEADER_ONLY_SIZE+sizeof(unsigned int), 0, raddr, sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1242                 break;
1243         case NET_TCP:
1244                 if(!Tcp_active){
1245                         ml_string("No TCP in rel_send_ack()");
1246                         return;
1247                 }
1248                 SENDTO(Unreliable_socket, (char *)&ack_header, RELIABLE_PACKET_HEADER_ONLY_SIZE+sizeof(unsigned int), 0, raddr, sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1249                 break;
1250         default:
1251                 ml_string("Unknown protocol type in nw_SendReliable()");
1252                 // Int3();
1253                 break;
1254         }
1255 }
1256
1257 // function to shutdown and close the given socket.  It takes a couple of things into consideration
1258 // when closing, such as possibly reiniting reliable sockets if they are closed here.
1259 void psnet_rel_close_socket( PSNET_SOCKET_RELIABLE *sockp )
1260 {
1261         reliable_header diss_conn_header;
1262
1263         // if the socket is out of range
1264         if(*sockp>=MAXRELIABLESOCKETS)
1265         {
1266                 ml_printf("Invalid socket id passed to nw_NewCloseSocket() -- %d\n",*sockp);
1267                 return;
1268         }
1269         ml_printf("Closing socket %d\n",*sockp);
1270
1271         // go through every buffer and "free it up(tm)"
1272         int i;
1273         for(i=0;i<MAXNETBUFFERS;i++){
1274                 if(Reliable_sockets[*sockp].rbuffers[i]){
1275                         if(Reliable_sockets[*sockp].rbuffers[i] != NULL){
1276                                 free(Reliable_sockets[*sockp].rbuffers[i]);
1277                         }
1278                         Reliable_sockets[*sockp].rbuffers[i] = NULL;
1279                         Reliable_sockets[*sockp].rsequence[i] = 0;
1280                 }
1281                 if(Reliable_sockets[*sockp].sbuffers[i]){
1282                         if(Reliable_sockets[*sockp].sbuffers[i] != NULL){
1283                                 free(Reliable_sockets[*sockp].sbuffers[i]);
1284                         }
1285                         Reliable_sockets[*sockp].sbuffers[i] = NULL;
1286                         Reliable_sockets[*sockp].rsequence[i] = 0;
1287                 }
1288         }
1289
1290         // send a disconnect packet to the socket on the other end
1291         diss_conn_header.type = RNT_DISCONNECT;
1292         diss_conn_header.seq = CONNECTSEQ;
1293         diss_conn_header.data_len = 0;
1294         if(*sockp==Serverconn){
1295                 Serverconn = 0xffffffff;
1296         }
1297         switch ( Reliable_sockets[*sockp].connection_type ) {
1298                 case NET_IPX:
1299                         if(!Ipx_active){
1300                                  return;
1301                         }
1302                         SENDTO(Unreliable_socket, (char *)&diss_conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[*sockp].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1303                         break;
1304                 case NET_TCP:
1305                         if(!Tcp_active){
1306                                 return;
1307                         }
1308                         SENDTO(Unreliable_socket, (char *)&diss_conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[*sockp].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1309                         break;
1310                 default:
1311                         ml_printf("Unknown protocol type in nw_CloseSocket()!\n");
1312                         // Int3();
1313                         break;
1314         }
1315         memset(&Reliable_sockets[*sockp],0,sizeof(reliable_socket));
1316         Reliable_sockets[*sockp].status = RNF_UNUSED;
1317 }
1318
1319 // function to check the status of the reliable socket and try to re-initialize it if necessary.
1320 // win95 seems to have trouble doing a reinit of the socket immediately after close, so this
1321 // function exists to check the status, and reinitialize if we need to
1322 int psnet_rel_check()
1323 {
1324         return 1;
1325 }
1326
1327 // send data reliably
1328 int psnet_rel_send(PSNET_SOCKET_RELIABLE socketid, ubyte *data, int length, int np_index)
1329 {
1330         int i;
1331         int bytesout = 0;
1332         reliable_socket *rsocket;
1333
1334         if(socketid >= MAXRELIABLESOCKETS){
1335                 ml_printf("Invalid socket id passed to psnet_rel_send() -- %d\n",socketid);
1336                 return -1;
1337         }
1338
1339         SDL_assert( length < (int)(sizeof(reliable_header)) );
1340         psnet_rel_work();
1341
1342         rsocket=&Reliable_sockets[socketid];
1343         if(rsocket->status!=RNF_CONNECTED) {
1344                 //We can't send because this isn't a connected reliable socket.
1345                 ml_printf("Can't send packet because of status %d in nw_SendReliable(). socket = %d\n",rsocket->status,socketid);
1346                 return -1;
1347         }
1348
1349         // Add the new packet to the sending list and send it.
1350         for(i=0;i<MAXNETBUFFERS;i++){
1351                 if(NULL==rsocket->sbuffers[i]){
1352                         reliable_header send_header;
1353                         int send_this_packet=1;
1354
1355                         rsocket->send_len[i] = length;
1356                         rsocket->sbuffers[i] = (reliable_net_sendbuffer *)malloc(sizeof(reliable_net_sendbuffer));
1357
1358                         memcpy(rsocket->sbuffers[i]->buffer,data,length);
1359
1360                         send_header.seq = INTEL_SHORT( rsocket->theirsequence );
1361                         rsocket->ssequence[i] = rsocket->theirsequence;
1362
1363                         memcpy(send_header.data,data,length);
1364                         send_header.data_len = INTEL_SHORT( (ushort)length );
1365                         send_header.type = RNT_DATA;
1366                         send_header.send_time = psnet_get_time();
1367                         send_header.send_time = INTEL_FLOAT( send_header.send_time );
1368                         // struct sockaddr_in * rsockaddr = (struct sockaddr_in *)&rsocket->addr;
1369
1370                         if (send_this_packet){
1371                                 switch ( rsocket->connection_type ){
1372                                         case NET_IPX:
1373                                                 if(!Ipx_active){
1374                                                         return 0;
1375                                                 }
1376                                                 bytesout = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i],0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1377                                                 break;
1378                                         case NET_TCP:
1379                                                 if(!Tcp_active){
1380                                                         return 0;
1381                                                 }
1382                                                 multi_rate_add(np_index, "tcp(h)", RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i]);
1383                                                 bytesout = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i],0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1384                                                 break;
1385                                         default:
1386                                                 ml_printf("Unknown protocol type in nw_SendReliable()!\n");
1387                                                 Int3();
1388                                                 break;
1389                                 }
1390                         }
1391                         if((bytesout==SOCKET_ERROR)&&(WSAEWOULDBLOCK==WSAGetLastError())){
1392                                 //This will cause it to try to send again next frame. (or sooner)
1393                                 rsocket->timesent[i] = psnet_get_time()-(NETRETRYTIME*4);
1394                         } else {
1395                                 rsocket->timesent[i] = psnet_get_time();
1396                         }
1397
1398
1399                         rsocket->theirsequence++;
1400                         return bytesout;
1401                 }
1402         }
1403         ml_printf("PSNET RELIABLE SEND BUFFER OVERRUN. socket = %d\n",socketid);
1404         // Int3();
1405         return 0;
1406 }
1407
1408 // Return codes:
1409 // -1 socket not connected
1410 // 0 No packet ready to receive
1411 // >0 Buffer filled with the number of bytes recieved
1412 int psnet_rel_get(PSNET_SOCKET socketid, ubyte *buffer, int max_len)
1413 {
1414         int i;
1415
1416         reliable_socket *rsocket = NULL;
1417         psnet_rel_work();
1418         if(socketid >= MAXRELIABLESOCKETS){
1419                 ml_printf("Invalid socket id passed to nw_NewReceiveReliable() -- %d\n",socketid);
1420                 return -1;
1421         }
1422         rsocket = &Reliable_sockets[socketid];
1423         if( (RNF_CONNECTED!=rsocket->status) && (RNF_LIMBO!=rsocket->status) ){
1424                 ml_printf("Can't receive packet because it isn't connected in nw_ReceiveReliable(). socket = %d\n",socketid);
1425                 return 0;
1426         }
1427         //If the buffer position is the position we are waiting for, fill in
1428         //the buffer we received in the call to this function and return true
1429
1430         for(i=0; i<MAXNETBUFFERS; i++){
1431                 if((rsocket->rsequence[i] == rsocket->oursequence) && rsocket->rbuffers[i]){
1432                         memcpy(buffer,rsocket->rbuffers[i]->buffer, rsocket->recv_len[i]);
1433                         free(rsocket->rbuffers[i]);
1434                         rsocket->rbuffers[i] = NULL;
1435                         rsocket->rsequence[i] = 0;
1436                         rsocket->oursequence++;
1437                         return rsocket->recv_len[i];
1438                 }
1439         }
1440
1441         return 0;
1442 }
1443
1444 // process all active reliable sockets
1445 void psnet_rel_work()
1446 {
1447         int i,j;
1448         int rcode = -1;
1449         int max_len = NETBUFFERSIZE;
1450         fd_set read_fds;
1451         struct timeval timeout;
1452         static reliable_header rcv_buff;
1453         static struct sockaddr rcv_addr;
1454         int bytesin = 0;
1455         int addrlen = sizeof(struct sockaddr);
1456         timeout.tv_sec=0;
1457         timeout.tv_usec=0;
1458
1459         PSNET_TOP_LAYER_PROCESS();
1460
1461         // negotitate initial connection with the server
1462         reliable_socket *rsocket = NULL;
1463         if(Serverconn != 0xffffffff){
1464                 //Check to see if we need to send a packet out.
1465                 if((Reliable_sockets[Serverconn].status==RNF_LIMBO) && ((Serverconn != 0xffffffff) && fl_abs((psnet_get_time() - Last_sent_iamhere))>NETRETRYTIME) ){
1466                         reliable_header conn_header;
1467                         //Now send I_AM_HERE packet
1468                         conn_header.type = RNT_I_AM_HERE;
1469                         conn_header.seq = (ushort)(~CONNECTSEQ);
1470                         conn_header.data_len = 0;
1471                         Last_sent_iamhere = psnet_get_time();
1472                         int ret = SOCKET_ERROR;
1473                         switch ( Reliable_sockets[Serverconn].connection_type ) {
1474                         case NET_IPX:
1475                                 if(!Ipx_active){
1476                                         ml_printf("Unable to use this network connection type in nw_WorkReliable()\n");
1477                                         Int3();
1478                                         return;
1479                                 }
1480                                 ret = SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[Serverconn].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1481                                 break;
1482                         case NET_TCP:
1483                                 if(!Tcp_active){
1484                                         ml_printf("Unable to use this network connection type in nw_WorkReliable()\n");
1485                                         Int3();
1486                                         return;
1487                                 }
1488                                 ret = SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[Serverconn].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1489                                 break;
1490                         default:
1491                                 ml_printf("Unknown protocol type in nw_WorkReliable()!\n");
1492                                 Int3();
1493                                 break;
1494                         }
1495
1496                         if((ret == SOCKET_ERROR) && (WSAEWOULDBLOCK == WSAGetLastError())){
1497                                 Reliable_sockets[Serverconn].last_packet_sent = psnet_get_time()-NETRETRYTIME;
1498                         } else {
1499                                 Reliable_sockets[Serverconn].last_packet_sent = psnet_get_time();
1500                         }
1501                 }
1502         }
1503
1504         ubyte link_type;
1505         net_addr_t d3_rcv_addr;
1506         struct sockaddr_in *rcvaddr;
1507         int ipx_has_data = 0;
1508         int udp_has_data = 0;
1509         do {
1510                 rsocket = NULL;
1511                 //Check IPX and UDP
1512                 if(Ipx_active && (Socket_type == NET_IPX)){
1513                         FD_ZERO(&read_fds);
1514                         FD_SET(Unreliable_socket, &read_fds);
1515 #ifndef PLAT_UNIX
1516                         ipx_has_data = SELECT(0,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_RELIABLE);
1517 #else
1518                         ipx_has_data = SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_RELIABLE);
1519 #endif
1520                 }
1521                 if(Tcp_active && (Socket_type == NET_TCP)){
1522                         FD_ZERO(&read_fds);
1523                         FD_SET(Unreliable_socket, &read_fds);
1524 #ifndef PLAT_UNIX
1525                         udp_has_data = SELECT(0,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_RELIABLE);
1526 #else
1527                         udp_has_data = SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_RELIABLE);
1528 #endif
1529                 }
1530                 bytesin = 0;
1531                 addrlen = sizeof(struct sockaddr);
1532                 if(ipx_has_data){
1533 #ifndef PLAT_UNIX
1534                         SOCKADDR_IPX *ipx_addr = (SOCKADDR_IPX *)&rcv_addr;
1535                         memset(&d3_rcv_addr,0,sizeof(net_addr_t));
1536                         memset(&rcv_addr,0,sizeof(struct sockaddr));
1537                         bytesin = RECVFROM(Unreliable_socket, (char *)&rcv_buff,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1538                         memcpy(d3_rcv_addr.addr, ipx_addr->sa_nodenum, 6);
1539                         memcpy(d3_rcv_addr.net_id, ipx_addr->sa_netnum, 4);
1540                         d3_rcv_addr.type = NET_IPX;
1541                         link_type = NET_IPX;
1542 #endif
1543                 } else if(udp_has_data){
1544                         struct sockaddr_in *tcp_addr = (struct sockaddr_in *)&rcv_addr;
1545                         memset(&d3_rcv_addr,0,sizeof(net_addr_t));
1546                         memset(&rcv_addr,0,sizeof(struct sockaddr));
1547                         bytesin = RECVFROM(Unreliable_socket, (char *)&rcv_buff,sizeof(reliable_header), 0, (struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1548                         rcv_buff.seq = INTEL_SHORT( rcv_buff.seq );
1549                         rcv_buff.data_len = INTEL_SHORT( rcv_buff.data_len );
1550                         rcv_buff.send_time = INTEL_FLOAT( rcv_buff.send_time );
1551                         memcpy(d3_rcv_addr.addr, &tcp_addr->sin_addr.s_addr, 4);
1552                         d3_rcv_addr.port = tcp_addr->sin_port;
1553                         d3_rcv_addr.type = NET_TCP;
1554                         link_type = NET_TCP;
1555                 } else {
1556                         //Neither socket had data waiting
1557                         break;
1558                 }
1559
1560                 if(bytesin==-1){
1561                         ml_printf("recvfrom returned an error! -- %d\n",WSAGetLastError());
1562                         //Int3();//See Kevin
1563                         return;
1564                 }
1565                 if(bytesin){
1566                         //Someone wants to connect, so find a slot
1567                         if(rcv_buff.type == RNT_REQ_CONN){
1568                                 for(i=1; i<MAXRELIABLESOCKETS; i++){
1569                                         if( (Reliable_sockets[i].status == RNF_CONNECTED) || (Reliable_sockets[i].status == RNF_LIMBO) ){
1570                                                 //if(memcmp(&rcv_addr,&reliable_sockets[i].addr,sizeof(struct sockaddr))==0)
1571                                                 if(memcmp(&d3_rcv_addr, &Reliable_sockets[i].net_addr, sizeof(net_addr_t)) == 0){
1572                                                         //We already have a reliable link to this user, so we will ignore it...
1573                                                         ml_printf("Received duplicate connection request. %d\n",i);
1574                                                         //reliable_sockets[i].last_packet_received = timer_GetTime();
1575                                                         psnet_rel_send_ack(&Reliable_sockets[i].addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1576                                                         //We will change this as a hack to prevent later code from hooking us up
1577                                                         rcv_buff.type = 0xff;
1578                                                         continue;
1579                                                 }
1580                                         }
1581                                 }
1582                                 for(i=1; i<MAXRELIABLESOCKETS; i++){
1583                                         if(Reliable_sockets[i].status == RNF_UNUSED){
1584                                                 //Add the new connection here.
1585                                                 Reliable_sockets[i].connection_type=link_type;
1586                                                 memcpy(&Reliable_sockets[i].net_addr, &d3_rcv_addr, sizeof(net_addr_t));
1587                                                 memcpy(&Reliable_sockets[i].addr ,&rcv_addr, sizeof(struct sockaddr));
1588                                                 Reliable_sockets[i].ping_pos = 0;
1589                                                 Reliable_sockets[i].num_ping_samples = 0;
1590                                                 Reliable_sockets[i].status = RNF_LIMBO;
1591                                                 Reliable_sockets[i].last_packet_received = psnet_get_time();
1592                                                 rsocket = &Reliable_sockets[i];
1593                                                 rcvaddr = (struct sockaddr_in *)&rcv_addr;
1594                                                 ml_printf("Connect from %s:%d\n", inet_ntoa(rcvaddr->sin_addr), htons(rcvaddr->sin_port));
1595                                                 break;
1596                                         }
1597                                 }
1598                                 if(i==MAXRELIABLESOCKETS){
1599                                         //No more connections!
1600                                         ml_printf("Out of incoming reliable connection sockets\n");
1601                                         //Int3();//See Kevin
1602                                         continue;
1603                                 }
1604                                 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1605                         }
1606
1607                         //Find out if this is a packet from someone we were expecting a packet.
1608                         rcvaddr = (struct sockaddr_in *)&rcv_addr;
1609                         for(i=1; i<MAXRELIABLESOCKETS; i++){
1610                                 if(memcmp(&d3_rcv_addr,&Reliable_sockets[i].net_addr,sizeof(net_addr_t)) == 0){
1611                                         rsocket=&Reliable_sockets[i];
1612                                         break;
1613                                 }
1614                         }
1615                         if(rsocket == NULL){
1616                                 ml_printf("Received reliable data from unconnected client.\n");
1617                                 ml_printf("Received from %s:%d\n",inet_ntoa(rcvaddr->sin_addr),rcvaddr->sin_port);
1618                                 continue ;
1619                         }
1620                         rsocket->last_packet_received = psnet_get_time();
1621
1622                         if(rsocket->status != RNF_CONNECTED){
1623                                 //Get out of limbo
1624                                 if(rsocket->status == RNF_LIMBO){
1625                                         //this is our connection to the server
1626                                         if(Serverconn != 0xffffffff){
1627                                                 if(rcv_buff.type == RNT_ACK){
1628                                                         ushort *acknum = (ushort *)&rcv_buff.data;
1629                                                         if(*acknum == (~CONNECTSEQ & 0xffff)){
1630                                                                 rsocket->status = RNF_CONNECTED;
1631                                                                 ml_printf("Got ACK for IAMHERE!\n");
1632                                                         }
1633                                                         continue;
1634                                                 }
1635                                         } else if(rcv_buff.type == RNT_I_AM_HERE){
1636                                                 rsocket->status = RNF_CONNECTING;
1637                                                 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1638                                                 ml_printf("Got IAMHERE!\n");
1639                                                 continue;
1640                                         }
1641                                 }
1642                                 if((rcv_buff.type == RNT_DATA) && (Serverconn != 0xffffffff)){
1643                                         rsocket->status = RNF_CONNECTED;
1644                                 } else {
1645                                         rsocket->last_packet_received = psnet_get_time();
1646                                         continue;
1647                                 }
1648                         }
1649                         //Update the last recv variable so we don't need a heartbeat
1650                         rsocket->last_packet_received = psnet_get_time();
1651
1652                         if(rcv_buff.type == RNT_HEARTBEAT){
1653                                 continue;
1654                         }
1655                         if(rcv_buff.type == RNT_ACK){
1656                                 //Update ping time
1657                                 rsocket->num_ping_samples++;
1658
1659                                 rsocket->pings[rsocket->ping_pos] = rsocket->last_packet_received - rcv_buff.send_time;
1660                                 if(rsocket->num_ping_samples >= MAX_PING_HISTORY){
1661                                         float sort_ping[MAX_PING_HISTORY];
1662                                         for(int a=0;a<MAX_PING_HISTORY;a++){
1663                                                 sort_ping[a] = rsocket->pings[a];
1664                                         }
1665
1666                                         qsort(sort_ping ,MAX_PING_HISTORY, sizeof(float), psnet_rel_ping_compare);
1667                                         rsocket->mean_ping = ((sort_ping[MAX_PING_HISTORY/2]+sort_ping[(MAX_PING_HISTORY/2)+1]))/2;
1668                                 }
1669                                 rsocket->ping_pos++;
1670                                 if(rsocket->ping_pos >= MAX_PING_HISTORY){
1671                                         rsocket->ping_pos=0;
1672                                 }
1673
1674                                 // if this is an ack for a send buffer on the socket, kill the send buffer. its done
1675                                 for(i=0; i<MAXNETBUFFERS; i++){
1676                                         unsigned int *acksig = (unsigned int *)&rcv_buff.data;
1677                                         if(rsocket){
1678                                                 if(rsocket->sbuffers[i]){
1679                                                         if(rsocket->ssequence[i] == INTEL_INT(*acksig) ){
1680                                                                 SDL_assert(rsocket->sbuffers[i] != NULL);
1681                                                                 free(rsocket->sbuffers[i]);
1682                                                                 rsocket->sbuffers[i] = NULL;
1683                                                                 rsocket->ssequence[i] = 0;
1684                                                         }
1685                                                 }
1686                                         }
1687                                 }
1688                                 //remove that packet from the send buffer
1689                                 rsocket->last_packet_received = psnet_get_time();
1690                                 continue;
1691                         }
1692
1693                         if(rcv_buff.type == RNT_DATA_COMP){
1694                                 //More2Come
1695                                 //Decompress it. Put it back in the buffer. Process it as RNT_DATA
1696                                 rcv_buff.type = RNT_DATA;
1697                         }
1698                         if(rcv_buff.type == RNT_DATA){
1699                                 //If the data is out of order by >= MAXNETBUFFERS-1 ignore that packet for now
1700                                 int seqdelta;
1701                                 seqdelta = rcv_buff.seq - rsocket->oursequence;
1702                                 if(seqdelta<0) seqdelta = seqdelta*-1;
1703                                 if(seqdelta>=MAXNETBUFFERS - 1){
1704                                         ml_printf("Received reliable packet out of order!\n");
1705                                         //It's out of order, so we won't ack it, which will mean we will get it again soon.
1706                                         continue;
1707                                 }
1708                                 //else move data into the proper buffer position
1709                                 int savepacket=1;
1710
1711                                 if(rsocket->oursequence < (0xffff - (MAXNETBUFFERS-1))){
1712                                         if (rsocket->oursequence > rcv_buff.seq){
1713                                                 savepacket = 0;
1714                                         }
1715                                 } else {
1716                                         //Sequence is high, so prepare for wrap around
1717                                         if( ((unsigned short)(rcv_buff.seq + rsocket->oursequence)) > (MAXNETBUFFERS-1)){
1718                                                 savepacket = 0;
1719                                         }
1720                                 }
1721
1722                                 for(i=0; i<MAXNETBUFFERS; i++){
1723                                         if( (NULL != rsocket->rbuffers[i]) && (rsocket->rsequence[i] == rcv_buff.seq)){
1724                                                 //Received duplicate packet!
1725                                                 savepacket = 0;
1726                                         }
1727                                 }
1728                                 if(savepacket){
1729                                         for(i=0; i<MAXNETBUFFERS; i++){
1730                                                 if(NULL == rsocket->rbuffers[i]){
1731                                                         if(rcv_buff.data_len>max_len){
1732                                                                 rsocket->recv_len[i] = rcv_buff.data_len;
1733                                                         } else {
1734                                                                 rsocket->recv_len[i] = rcv_buff.data_len;
1735                                                         }
1736                                                         rsocket->rbuffers[i] = (reliable_net_rcvbuffer *)malloc(sizeof(reliable_net_rcvbuffer));
1737                                                         memcpy(rsocket->rbuffers[i]->buffer,rcv_buff.data,rsocket->recv_len[i]);
1738                                                         rsocket->rsequence[i] = rcv_buff.seq;
1739                                                         break;
1740                                                 }
1741                                         }
1742                                 }
1743                                 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1744                         }
1745
1746                 }
1747         } while((ipx_has_data>0) || (udp_has_data>0));
1748
1749         // Go through each reliable socket that is connected and do any needed work.
1750         for(j=0; j<MAXRELIABLESOCKETS; j++){
1751                 rsocket=&Reliable_sockets[j];
1752
1753                 if(Serverconn == 0xffffffff){
1754                         if(rsocket->status==RNF_LIMBO){
1755                                 if(fl_abs((psnet_get_time() - rsocket->last_packet_received))>Nettimeout){
1756                                         ml_printf("Reliable (but in limbo) socket (%d) timed out in nw_WorkReliable().\n",j);
1757                                         memset(rsocket,0,sizeof(reliable_socket));
1758                                         rsocket->status = RNF_UNUSED;//Won't work if this is an outgoing connection.
1759                                 }
1760                         }
1761                 } else {
1762                         if((rsocket->status == RNF_LIMBO) && (fl_abs((psnet_get_time() - First_sent_iamhere)) > Nettimeout)){
1763                                 rsocket->status = RNF_BROKEN;
1764                                 ml_printf("Reliable socket (%d) timed out in nw_WorkReliable().\n",j);
1765                         }
1766                 }
1767
1768                 if(rsocket->status == RNF_CONNECTED){
1769                         float retry_packet_time;
1770                         if((rsocket->mean_ping==0) || (rsocket->mean_ping > (NETRETRYTIME*4))){
1771                                 retry_packet_time = NETRETRYTIME;
1772                         } else {
1773                                 if(rsocket->mean_ping<MIN_NET_RETRYTIME) {
1774                                         retry_packet_time = (float)MIN_NET_RETRYTIME;
1775                                 } else {
1776                                         retry_packet_time = ((float)(float)rsocket->mean_ping * (float)1.25);
1777                                 }
1778                         }
1779                         //Iterate through send buffers.
1780                         for(i=0;i<MAXNETBUFFERS;i++){
1781                                 // send again
1782                                 if((rsocket->sbuffers[i]) && (fl_abs((psnet_get_time() - rsocket->timesent[i])) >= retry_packet_time)) {
1783                                         reliable_header send_header;
1784                                         send_header.send_time = psnet_get_time();
1785                                         send_header.send_time = INTEL_FLOAT( send_header.send_time );
1786                                         send_header.seq = INTEL_SHORT( rsocket->ssequence[i] );
1787                                         memcpy(send_header.data,rsocket->sbuffers[i]->buffer,rsocket->send_len[i]);
1788                                         send_header.data_len = INTEL_SHORT( (ushort)rsocket->send_len[i] );
1789                                         send_header.type = RNT_DATA;
1790                                         if(rsocket->connection_type == NET_TCP){
1791                                                 rcode = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i],0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1792                                         } else if(rsocket->connection_type == NET_IPX){
1793                                                 rcode = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i],0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1794                                         }
1795                                         if((rcode == SOCKET_ERROR) && (WSAEWOULDBLOCK == WSAGetLastError())){
1796                                                 //The packet didn't get sent, flag it to try again next frame
1797                                                 rsocket->timesent[i] = psnet_get_time()-(NETRETRYTIME*4);
1798                                         } else {
1799                                                 rsocket->last_packet_sent = psnet_get_time();
1800                                                 rsocket->timesent[i] = psnet_get_time();
1801                                         }
1802
1803                                 }//getcwd
1804                         }
1805
1806                         if((rsocket->status == RNF_CONNECTED) && (fl_abs((psnet_get_time() - rsocket->last_packet_sent)) > NETHEARTBEATTIME)) {
1807                                 reliable_header send_header;
1808                                 send_header.send_time = psnet_get_time();
1809                                 send_header.send_time = INTEL_FLOAT( send_header.send_time );
1810                                 send_header.seq = 0;
1811                                 send_header.data_len = 0;
1812                                 send_header.type = RNT_HEARTBEAT;
1813
1814                                 rcode = -1;
1815                                 if(rsocket->connection_type == NET_TCP){
1816                                         rcode = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1817                                 } else if(rsocket->connection_type == NET_IPX){
1818                                         rcode = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1819                                 }
1820                                 if((rcode != SOCKET_ERROR) && (WSAEWOULDBLOCK != WSAGetLastError())){
1821                                         //It must have been sent
1822                                         rsocket->last_packet_sent = psnet_get_time();
1823                                 }
1824                         }
1825
1826                         if((rsocket->status == RNF_CONNECTED) && (fl_abs((psnet_get_time() - rsocket->last_packet_received))>Nettimeout)){
1827                                 //This socket is hosed.....inform someone?
1828                                 ml_printf("Reliable Socket (%d) timed out in nw_WorkReliable().\n",j);
1829                                 rsocket->status = RNF_BROKEN;
1830                         }
1831                 }
1832         }
1833 }
1834
1835 // get the status of a reliable socket, see RNF_* defines above
1836 int psnet_rel_get_status(PSNET_SOCKET_RELIABLE socketid)
1837 {
1838         if(socketid >= MAXRELIABLESOCKETS){
1839                 return -1;
1840         }
1841
1842         return Reliable_sockets[socketid].status;
1843 }
1844
1845 // function which checks the Listen_socket for possibly incoming requests to be connected.
1846 // returns 0 on error or nothing waiting.  1 if we should try to accept
1847 int psnet_rel_check_for_listen(net_addr_t *from_addr)
1848 {
1849         struct sockaddr_in *ip_addr;                            // UDP/TCP socket structure
1850 #ifndef PLAT_UNIX
1851         SOCKADDR_IPX *ipx_addr;                 // IPX socket structure
1852 #endif
1853
1854         psnet_rel_work();
1855         int i;
1856         for(i=1; i<MAXRELIABLESOCKETS; i++){
1857                 if(Reliable_sockets[i].status == RNF_CONNECTING){
1858                         Reliable_sockets[i].status = RNF_CONNECTED;
1859                         //memcpy(from_addr,&reliable_sockets[i].addr,sizeof(struct sockaddr));
1860                         ml_printf("New reliable connection in nw_CheckListenSocket().\n");
1861
1862                         switch ( Reliable_sockets[i].connection_type ){
1863                         case NET_IPX:
1864 #ifndef PLAT_UNIX
1865                                 ipx_addr = (SOCKADDR_IPX *)&Reliable_sockets[i].addr;
1866                                 memset(from_addr, 0x00, sizeof(net_addr_t));
1867                                 from_addr->port = ntohs( ipx_addr->sa_socket );
1868                                 from_addr->type = NET_IPX;
1869                                 memcpy(from_addr->addr, ipx_addr->sa_nodenum, 6 );
1870                                 memcpy(from_addr->net_id, ipx_addr->sa_netnum, 4 );
1871 #endif
1872                                 break;
1873
1874                         case NET_TCP:
1875                                 ip_addr = (struct sockaddr_in *)&Reliable_sockets[i].addr;
1876                                 memset(from_addr, 0x00, sizeof(net_addr_t));
1877                                 from_addr->port = ntohs( ip_addr->sin_port );
1878                                 from_addr->type = NET_TCP;
1879 #ifndef PLAT_UNIX
1880                                 memcpy(from_addr->addr, &ip_addr->sin_addr.S_un.S_addr, 4);
1881 #else
1882                                 memcpy(from_addr->addr, &ip_addr->sin_addr.s_addr, 4);
1883 #endif
1884                                 break;
1885
1886                         default:
1887                                 Int3();
1888                                 break;
1889                         }
1890                         /*
1891                         char dbg_output[50];
1892                         nw_GetNumbersFromHostAddress(from_addr,dbg_output);
1893                         mprintf((0,"Got address from: %s\n",dbg_output));
1894                         */
1895                         return i;
1896                 }
1897         }
1898         return INVALID_SOCKET;
1899 }
1900
1901 // attacmpt to connect() to the server's tcp socket.  socket parameter is simply assigned to the
1902 // Reliable_socket socket created in psnet_init
1903 void psnet_rel_connect_to_server(PSNET_SOCKET *socket, net_addr_t *server_addr)
1904 {
1905         //Send out a RNT_REQ_CONN packet, and wait for it to be acked.
1906         struct sockaddr_in sockaddr;                            // UDP/TCP socket structure
1907 #ifndef PLAT_UNIX
1908         SOCKADDR_IPX ipx_addr;                          // IPX socket structure
1909 #endif
1910         struct sockaddr *addr = NULL;                                           // pointer to struct sockaddr to make coding easier
1911         struct sockaddr rcv_addr;
1912         int addrlen;
1913         ubyte iaddr[6];
1914         ushort port;
1915 //      float time_sent_req = 0;
1916         float first_sent_req = 0;
1917         static reliable_header conn_header;
1918         static reliable_header ack_header;
1919         int bytesin;
1920         struct timeval timeout;
1921         fd_set read_fds;
1922         int i;
1923         *socket = INVALID_SOCKET;
1924
1925         memset(iaddr, 0x00, 6);
1926         memcpy(iaddr, &server_addr->addr, 6);
1927         port = (ushort)(server_addr->port);     // Talk to the server listen port
1928
1929         conn_header.type = RNT_REQ_CONN;
1930         conn_header.seq = CONNECTSEQ;
1931         conn_header.data_len = 0;
1932
1933         timeout.tv_sec=0;
1934         timeout.tv_usec=0;
1935
1936         if((server_addr->type == NET_IPX) && (!Ipx_active)){
1937                 return;
1938         }
1939         if((server_addr->type == NET_TCP) && (!Tcp_active)){
1940                 return;
1941         }
1942         //Flush out any left overs
1943         if(Tcp_active && (Socket_type == NET_TCP)){
1944                 FD_ZERO(&read_fds);
1945                 FD_SET(Unreliable_socket, &read_fds);
1946 #ifndef PLAT_UNIX
1947                 while(SELECT(0, &read_fds, NULL, NULL, &timeout, PSNET_TYPE_RELIABLE)){
1948 #else
1949                 while(SELECT(Unreliable_socket+1, &read_fds, NULL, NULL, &timeout, PSNET_TYPE_RELIABLE)){
1950 #endif
1951                         addrlen = sizeof(struct sockaddr);
1952                         bytesin = RECVFROM(Unreliable_socket, (char *)&ack_header,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1953                         if(bytesin==-1){
1954                                 //Int3();//See Kevin
1955                                 ml_printf("UDP recvfrom returned an error! -- %d\n",WSAGetLastError());
1956                                 break;
1957                                 //return;
1958                         }
1959                         FD_ZERO(&read_fds);
1960                         FD_SET(Unreliable_socket, &read_fds);
1961                 }
1962         }
1963         if(Ipx_active && (Socket_type == NET_IPX)){
1964                 FD_ZERO(&read_fds);
1965                 FD_SET(Unreliable_socket, &read_fds);
1966 #ifndef PLAT_UNIX
1967                 while(SELECT(0, &read_fds, NULL, NULL, &timeout, PSNET_TYPE_RELIABLE))
1968 #else
1969                 while(SELECT(Unreliable_socket+1, &read_fds, NULL, NULL, &timeout, PSNET_TYPE_RELIABLE))
1970 #endif
1971                 {
1972                         addrlen = sizeof(struct sockaddr);
1973                         bytesin = RECVFROM(Unreliable_socket, (char *)&ack_header,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1974                         if(bytesin==-1)
1975                         {
1976                                 //Int3();//See Kevin
1977                                 ml_printf("IPX recvfrom returned an error! -- %d\n",WSAGetLastError());
1978                                 break;
1979                         }
1980                         FD_ZERO(&read_fds);
1981                         FD_SET(Unreliable_socket, &read_fds);
1982                 }
1983         }
1984         memset(&ack_header,0,sizeof(reliable_header));
1985         bytesin = 0;
1986         SOCKET typeless_sock = 0;
1987         net_addr_t d3_rcv_addr;
1988         memset(&d3_rcv_addr,0,sizeof(net_addr_t));
1989
1990         switch ( server_addr->type ){
1991                 case NET_IPX:
1992 #ifndef PLAT_UNIX
1993                         ipx_addr.sa_family = AF_IPX;
1994                         memcpy(ipx_addr.sa_nodenum, iaddr, 6);
1995                         memcpy(ipx_addr.sa_netnum, server_addr->net_id, 4);
1996                         ipx_addr.sa_socket = htons(port);
1997                         addr = (struct sockaddr *)&ipx_addr;
1998                         if( SOCKET_ERROR == SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE) ){
1999                                 ml_printf("Unable to send IPX packet in nw_ConnectToServer()! -- %d\n",WSAGetLastError());
2000                                 return;
2001                         }
2002                         typeless_sock = Unreliable_socket;
2003                         memcpy(d3_rcv_addr.addr,ipx_addr.sa_nodenum, 6);
2004                         memcpy(d3_rcv_addr.net_id,ipx_addr.sa_netnum, 4);
2005                         d3_rcv_addr.type = NET_IPX;
2006 #endif
2007                         break;
2008                 case NET_TCP:
2009                         sockaddr.sin_family = AF_INET;
2010                         memcpy(&sockaddr.sin_addr.s_addr, iaddr, 4);
2011                         sockaddr.sin_port = htons(port);
2012                         addr = (struct sockaddr *)&sockaddr;
2013                         if( SOCKET_ERROR == SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE) ){
2014                                 ml_printf("Unable to send UDP packet in nw_ConnectToServer()! -- %d\n",WSAGetLastError());
2015                                 return;
2016                         }
2017                         memcpy(d3_rcv_addr.addr, &sockaddr.sin_addr.s_addr, 4);
2018                         d3_rcv_addr.port = sockaddr.sin_port;
2019                         d3_rcv_addr.type = NET_TCP;
2020                         typeless_sock = Unreliable_socket;
2021                         break;
2022
2023                 default:
2024                         ml_printf("Network","Unknown protocol type in nw_ConnectToServer()!\n");
2025                         Int3();
2026                         return;
2027         }
2028
2029
2030         first_sent_req = psnet_get_time();
2031 //      time_sent_req = psnet_get_time();
2032
2033         //Wait until we get a response from the server or we timeout
2034
2035         do {
2036                 PSNET_TOP_LAYER_PROCESS();
2037
2038                 FD_ZERO(&read_fds);
2039                 FD_SET(typeless_sock, &read_fds);
2040 #ifndef PLAT_UNIX
2041                 if(SELECT(0, &read_fds, NULL,NULL,&timeout, PSNET_TYPE_RELIABLE)){
2042 #else
2043                 if(SELECT(typeless_sock+1, &read_fds, NULL,NULL,&timeout, PSNET_TYPE_RELIABLE)){
2044 #endif
2045                         ml_string("selected() in psnet_rel_connect_to_server()");
2046
2047                         addrlen = sizeof(struct sockaddr);
2048                         bytesin = RECVFROM(typeless_sock,(char *)&ack_header,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
2049                         if(bytesin==-1){
2050                                 ml_printf("recvfrom returned an error! -- %d\n",WSAGetLastError());
2051                                 Int3();//See Kevin
2052                                 return;
2053                         }
2054
2055                         ml_string("received data after select in psnet_rel_connect_to_server()");
2056                         if(bytesin){
2057                                 ml_string("about to check ack_header.type");
2058                                 if(ack_header.type == RNT_ACK){
2059                                         short *acknum = (short *)&ack_header.data;
2060                                         if(*acknum == CONNECTSEQ){
2061                                                 for(i=1; i<MAXRELIABLESOCKETS; i++){
2062                                                         if(Reliable_sockets[i].status==RNF_UNUSED){
2063                                                                 //Add the new connection here.
2064                                                                 memset(&Reliable_sockets[i],0,sizeof(reliable_socket));
2065                                                                 Reliable_sockets[i].connection_type = (ubyte)server_addr->type;
2066                                                                 memcpy(&Reliable_sockets[i].net_addr,&d3_rcv_addr,sizeof(net_addr_t));
2067                                                                 Reliable_sockets[i].last_packet_received = psnet_get_time();
2068                                                                 memcpy(&Reliable_sockets[i].addr,&rcv_addr,sizeof(struct sockaddr));
2069                                                                 Reliable_sockets[i].status = RNF_LIMBO;
2070                                                                 *socket = i;
2071                                                                 ml_printf("Succesfully connected to server in nw_ConnectToServer().\n");
2072                                                                 //Now send I_AM_HERE packet
2073                                                                 conn_header.type = RNT_I_AM_HERE;
2074                                                                 conn_header.seq = (ushort)(~CONNECTSEQ);
2075                                                                 conn_header.data_len = 0;
2076                                                                 Serverconn = i;
2077                                                                 First_sent_iamhere = psnet_get_time();
2078                                                                 Last_sent_iamhere = psnet_get_time();
2079                                                                 int rcode = SENDTO(typeless_sock,(char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
2080                                                                 if(rcode == SOCKET_ERROR){
2081                                                                         *socket = INVALID_SOCKET;
2082                                                                         Reliable_sockets[i].status = RNF_UNUSED;
2083                                                                         memset(&Reliable_sockets[i],0,sizeof(reliable_socket));
2084                                                                         ml_printf("Unable to send packet in nw_ConnectToServer()\n");
2085                                                                         return;
2086                                                                 }
2087                                                                 Reliable_sockets[i].last_packet_sent = psnet_get_time();
2088                                                                 float f;
2089                                                                 f = psnet_get_time();
2090                                                                 while((fl_abs((psnet_get_time() - f))<2) && (Reliable_sockets[i].status != RNF_CONNECTING)){
2091                                                                         psnet_rel_work();
2092                                                                 }
2093
2094                                                                 return;
2095                                                         }
2096                                                 }
2097                                                 ml_printf("Out of reliable socket space in nw_ConnectToServer().\n");
2098                                                 return;
2099                                         } else ml_printf("Received out of sequence ACK in nw_ConnectToServer().\n");
2100                                 } else ml_printf("Received something that isn't an ACK in nw_ConnectToServer().\n");
2101                         } else ml_printf("Received 0 bytes from recvfrom() in nw_ConnectToServer().\n");
2102                 }
2103                 /*
2104                 if((psnet_get_time()-time_sent_req)>2)
2105                 {
2106                         ml_printf("Resending connect request.\n");
2107                         int ret = SENDTO(typeless_sock,(char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
2108                         if(ret != SOCKET_ERROR){
2109                                 time_sent_req = psnet_get_time();
2110                         } else {
2111                                 ml_printf("Error sending connection request! -- %d\n",WSAGetLastError() );
2112                         }
2113                 }
2114                 */
2115
2116         } while(fl_abs((psnet_get_time() - first_sent_req)) < RELIABLE_CONNECT_TIME);
2117 }
2118
2119 // returns the ip address of this computer
2120 /*
2121 int psnet_rel_get_ip()
2122 {
2123         char local[255];
2124         LPHOSTENT hostent;
2125         struct sockaddr_in local_address;
2126         int ret;
2127
2128         // Get the local host name
2129         memset(&local_address, 0, sizeof(local_address));
2130         ret = gethostname(local, 255 );
2131         if (ret != SOCKET_ERROR ){
2132                 // Resolve host name for local address
2133                 hostent = gethostbyname((char *)local);
2134                 if ( hostent ){
2135                         local_address.sin_addr.s_addr = *((u_long FAR *)(hostent->h_addr));
2136                 }
2137         } else {
2138                 ml_string("SOCKET_ERROR in psnet_rel_get_ip()!");
2139         }
2140         ml_printf(%s:%d\n", inet_ntoa(rcvaddr->sin_addr), htons(rcvaddr->sin_port)
2141         return local_address.sin_addr.s_addr;
2142 }
2143 */
2144
2145 // returns the ip address of this computer
2146 int psnet_get_ip()
2147 {
2148         struct sockaddr_in local_address;
2149
2150         if(Psnet_connection == NETWORK_CONNECTION_DIALUP){
2151                 local_address.sin_addr.s_addr = psnet_ras_status();
2152                 if(local_address.sin_addr.s_addr == INADDR_NONE){
2153                         local_address.sin_addr.s_addr = INADDR_ANY;
2154                 }
2155         } else {
2156                 // Init local address to zero
2157                 local_address.sin_addr.s_addr = INADDR_ANY;
2158         }
2159
2160         // NOTE: for memeory checkers, do NOT try to free this
2161         ml_printf("psnet_get_ip() reports IP : %s\n", inet_ntoa(local_address.sin_addr));
2162
2163         return local_address.sin_addr.s_addr;
2164 }
2165
2166 // initialize reliable sockets
2167 int psnet_init_rel_tcp(int port, int should_listen)
2168 {
2169         /*
2170         struct sockaddr_in sockaddr;
2171
2172         sockaddr.sin_port = htons((ushort)port);
2173         sockaddr.sin_family = AF_INET;
2174         unsigned int my_ip;
2175         ml_printf("Setting up reliable sockets.\n");
2176
2177         my_ip = psnet_get_ip();
2178
2179         memcpy(&sockaddr.sin_addr.s_addr, &my_ip, sizeof(uint));
2180
2181         Reliable_UDP_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP );
2182         if(INVALID_SOCKET == Reliable_UDP_socket){
2183                 ml_printf("Unable to create reliable UDP socket -- %d\n", WSAGetLastError() );
2184
2185                 return 0;
2186         } else if(bind(Reliable_UDP_socket,(struct sockaddr *)&sockaddr,sizeof(struct sockaddr))!=0){
2187                 ml_printf("Unable to bind reliable socket -- %d\n", WSAGetLastError() );
2188
2189                 return 0;
2190         }
2191
2192         // make any reliable sockets which we create that aren't listening non-blocking sockets
2193         int error;
2194         unsigned long arg;
2195
2196         arg = TRUE;
2197         error = ioctlsocket( Reliable_UDP_socket, FIONBIO, &arg );
2198         if ( error == SOCKET_ERROR ) {
2199                 ml_printf("Unable to make reliable UDP socket non-blocking -- %d\n", WSAGetLastError() );
2200
2201                 return 0;
2202         }
2203         */
2204
2205         // success
2206         return 1;
2207 }
2208
2209 // initialize reliable sockets
2210 int psnet_init_rel_ipx(int port, int should_listen)
2211 {
2212 #ifdef PLAT_UNIX
2213         return 0;
2214 #else
2215         /*
2216         SOCKADDR_IPX ipx_addr;
2217
2218         memset(&ipx_addr, 0, sizeof(SOCKADDR_IPX));
2219         ipx_addr.sa_family = AF_IPX;
2220         ipx_addr.sa_socket = htons((ushort)port);
2221
2222         Reliable_IPX_socket = socket(AF_IPX, SOCK_DGRAM, NSPROTO_IPX);
2223         if(INVALID_SOCKET == Reliable_IPX_socket){
2224                 ml_printf("Unable to create reliable IPX socket -- %d\n", WSAGetLastError() );
2225
2226                 return 0;
2227         } else if(bind(Reliable_IPX_socket,(struct sockaddr *)&ipx_addr,sizeof(struct sockaddr))!=0){
2228                 ml_printf("Unable to bind reliable IPX socket -- %d\n", WSAGetLastError() );
2229
2230                 return 0;
2231         }
2232
2233         // make any reliable sockets which we create that aren't listening non-blocking sockets
2234         int error;
2235         unsigned long arg;
2236
2237         arg = TRUE;
2238         error = ioctlsocket( Reliable_IPX_socket, FIONBIO, &arg );
2239         if ( error == SOCKET_ERROR ) {
2240                 ml_printf("Unable to make reliable IPX socket non-blocking -- %d\n", WSAGetLastError() );
2241
2242                 return 0;
2243         }
2244         */
2245
2246         // success
2247         return 1;
2248 #endif
2249 }
2250
2251 void psnet_rel_close()
2252 {
2253         int idx;
2254         PSNET_SOCKET_RELIABLE sock;
2255
2256         // kill all sockets
2257         for(idx=0; idx<MAXRELIABLESOCKETS; idx++){
2258                 if(Reliable_sockets[idx].status != RNF_UNUSED){
2259                         sock = idx;
2260                         psnet_rel_close_socket(&sock);
2261                 }
2262         }
2263 }
2264
2265 // ------------------------------------------------------------------------------------------------------
2266 // PACKET BUFFERING FUNCTIONS
2267 //
2268
2269 // initialize the buffering system
2270 void psnet_buffer_init(network_packet_buffer_list *l)
2271 {
2272         int idx;
2273
2274         // blast the buffer clean
2275         memset(l->psnet_buffers, 0, sizeof(network_packet_buffer) * MAX_PACKET_BUFFERS);
2276
2277         // set all buffer sequence #'s to -1
2278         for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
2279                 l->psnet_buffers[idx].sequence_number = -1;
2280         }
2281
2282         // initialize the sequence #
2283         l->psnet_seq_number = 0;
2284         l->psnet_lowest_id = -1;
2285         l->psnet_highest_id = -1;
2286 }
2287
2288 // buffer a packet (maintain order!)
2289 void psnet_buffer_packet(network_packet_buffer_list *l, ubyte *data, int length, net_addr_t *from)
2290 {
2291         int idx;
2292         int found_buf = 0;
2293
2294         // find the first empty packet
2295         for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
2296                 if(l->psnet_buffers[idx].sequence_number == -1){
2297                         found_buf = 1;
2298                         break;
2299                 }
2300         }
2301
2302         // if we didn't find the buffer, report an overrun
2303         if(!found_buf){
2304                 ml_printf("WARNING - Buffer overrun in psnet\n");
2305         } else {
2306                 // copy in the data
2307                 memcpy(l->psnet_buffers[idx].data, data, length);
2308                 l->psnet_buffers[idx].len = length;
2309                 memcpy(&l->psnet_buffers[idx].from_addr, from, sizeof(net_addr_t));
2310                 l->psnet_buffers[idx].sequence_number = l->psnet_seq_number;
2311
2312                 // keep track of the highest id#
2313                 l->psnet_highest_id = l->psnet_seq_number++;
2314
2315                 // set the lowest id# for the first time
2316                 if(l->psnet_lowest_id == -1){
2317                         l->psnet_lowest_id = l->psnet_highest_id;
2318                 }
2319         }
2320 }
2321
2322 // get the index of the next packet in order!
2323 int psnet_buffer_get_next(network_packet_buffer_list *l, ubyte *data, int *length, net_addr_t *from)
2324 {
2325         int idx;
2326         int found_buf = 0;
2327
2328         // if there are no buffers, do nothing
2329         if((l->psnet_lowest_id == -1) || (l->psnet_lowest_id > l->psnet_highest_id)){
2330                 return 0;
2331         }
2332
2333         // search until we find the lowest packet index id#
2334         for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
2335                 // if we found the buffer
2336                 if(l->psnet_buffers[idx].sequence_number == l->psnet_lowest_id){
2337                         found_buf = 1;
2338                         break;
2339                 }
2340         }
2341
2342         // at this point, we should _always_ have found the buffer
2343         SDL_assert(found_buf);
2344
2345         // copy out the buffer data
2346         memcpy(data, l->psnet_buffers[idx].data, l->psnet_buffers[idx].len);
2347         *length = l->psnet_buffers[idx].len;
2348         memcpy(from, &l->psnet_buffers[idx].from_addr, sizeof(net_addr_t));
2349
2350         // now we need to cleanup the packet list
2351
2352         // mark the buffer as free
2353         l->psnet_buffers[idx].sequence_number = -1;
2354         l->psnet_lowest_id++;
2355
2356         return 1;
2357 }
2358
2359 // -------------------------------------------------------------------------------------------------------
2360 // PSNET 2 FORWARD DEFINITIONS
2361 //
2362
2363 // if the string is a legally formatted ip string
2364 int psnet_is_valid_numeric_ip(char *ip)
2365 {
2366         char *token;
2367         char copy[100];
2368         int val1,val2,val3,val4;
2369
2370         // get the first ip value
2371         SDL_strlcpy(copy, ip, sizeof(copy));
2372         token = strtok(copy,".");
2373         if(token == NULL){
2374                 return 0;
2375         } else {
2376                 // get the value of the token
2377                 val1 = atoi(token);
2378                 if((val1 < 0) || (val1 > 255)){
2379                         return 0;
2380                 }
2381         }
2382
2383         // second ip value
2384         token = strtok(NULL,".");
2385         if(token == NULL){
2386                 return 0;
2387         } else {
2388                 // get the value of the token
2389                 val2 = atoi(token);
2390                 if((val2 < 0) || (val2 > 255)){
2391                         return 0;
2392                 }
2393         }
2394
2395         // third ip value
2396         token = strtok(NULL,".");
2397         if(token == NULL){
2398                 return 0;
2399         } else {
2400                 // get the value of the token
2401                 val3 = atoi(token);
2402                 if((val3 < 0) || (val3 > 255)){
2403                         return 0;
2404                 }
2405         }
2406
2407         // third ip value
2408         token = strtok(NULL,"");
2409         if(token == NULL){
2410                 return 0;
2411         } else {
2412                 // get the value of the token
2413                 val4 = atoi(token);
2414                 if((val4 < 0) || (val4 > 255)){
2415                         return 0;
2416                 }
2417         }
2418
2419         // make sure he hasn't entered all 0's
2420         if((val1 == 0) && (val2 == 0) && (val3 == 0) && (val4 == 0)){
2421                 return 0;
2422         }
2423
2424         // valid
2425         return 1;
2426 }
2427
2428 // function called from high level FreeSpace code to determine the status of the networking
2429 // code returns one of a handful of macros
2430 #ifndef PLAT_UNIX
2431 DWORD (__stdcall *pRasEnumConnections)(LPRASCONN lprasconn, LPDWORD lpcb, LPDWORD lpcConnections) = NULL;
2432 DWORD (__stdcall *pRasGetConnectStatus)(HRASCONN hrasconn, LPRASCONNSTATUS lprasconnstatus ) = NULL;
2433 DWORD (__stdcall *pRasGetProjectionInfo)(HRASCONN hrasconn, RASPROJECTION rasprojection, LPVOID lpprojection, LPDWORD lpcb ) = NULL;
2434
2435 // functions to get the status of a RAS connection
2436 unsigned int psnet_ras_status()
2437 {
2438         int rval;
2439         unsigned long size, num_connections, i;
2440         RASCONN rasbuffer[25];
2441         HINSTANCE ras_handle;
2442         unsigned long rasip=0;
2443         RASPPPIP projection;
2444         // int Ras_connected;
2445
2446         Ras_connected = 0;
2447
2448         // first, call a LoadLibrary to load the RAS api
2449         ras_handle = LoadLibrary( (LPCWSTR)"rasapi32.dll" );
2450         if ( ras_handle == NULL ) {
2451                 return INADDR_ANY;
2452         }
2453
2454         pRasEnumConnections = (DWORD (__stdcall *)(LPRASCONN, LPDWORD, LPDWORD))GetProcAddress(ras_handle, "RasEnumConnectionsA");
2455         if (!pRasEnumConnections)       {
2456                 FreeLibrary( ras_handle );
2457                 return INADDR_ANY;
2458         }
2459         pRasGetConnectStatus = (DWORD (__stdcall *)(HRASCONN, LPRASCONNSTATUS))GetProcAddress(ras_handle, "RasGetConnectStatusA");
2460         if (!pRasGetConnectStatus)      {
2461                 FreeLibrary( ras_handle );
2462                 return INADDR_ANY;
2463         }
2464         pRasGetProjectionInfo = (DWORD (__stdcall *)(HRASCONN, RASPROJECTION, LPVOID, LPDWORD))GetProcAddress(ras_handle, "RasGetProjectionInfoA");
2465         if (!pRasGetProjectionInfo)     {
2466                 FreeLibrary( ras_handle );
2467                 return INADDR_ANY;
2468         }
2469
2470         size = sizeof(rasbuffer);
2471         rasbuffer[0].dwSize = sizeof(RASCONN);
2472
2473         rval = pRasEnumConnections( rasbuffer, &size, &num_connections );
2474         if ( rval ) {
2475                 FreeLibrary( ras_handle );
2476                 return INADDR_ANY;
2477         }
2478
2479         // JAS: My computer gets to this point, but I have no RAS connections,
2480         // so just exit
2481         if ( num_connections < 1 )      {
2482                 ml_string("Found no RAS connections");
2483                 FreeLibrary( ras_handle );
2484                 return INADDR_ANY;
2485         }
2486
2487         ml_printf("Found %d connections", num_connections);
2488
2489         for (i = 0; i < num_connections; i++ ) {
2490                 RASCONNSTATUS status;
2491                 unsigned long size;
2492
2493                 ml_printf("Connection %d:", i);
2494                 ml_printf("Entry Name: %s", rasbuffer[i].szEntryName);
2495                 ml_printf("Device Type: %s", rasbuffer[i].szDeviceType);
2496                 ml_printf("Device Name: %s", rasbuffer[i].szDeviceName);
2497
2498                 // get the connection status
2499                 status.dwSize = sizeof(RASCONNSTATUS);
2500                 rval = pRasGetConnectStatus(rasbuffer[i].hrasconn, &status);
2501                 if ( rval != 0 ) {
2502                         FreeLibrary( ras_handle );
2503                         return INADDR_ANY;
2504                 }
2505
2506                 // get the projection informatiom
2507                 size = sizeof(projection);
2508                 projection.dwSize = size;
2509                 rval = pRasGetProjectionInfo(rasbuffer[i].hrasconn, RASP_PppIp, &projection, &size );
2510                 if ( rval != 0 ) {
2511                         FreeLibrary( ras_handle );
2512                         return INADDR_ANY;
2513                 }
2514
2515                 ml_printf("IP Address: %s", projection.szIpAddress);
2516         }
2517
2518         Ras_connected = 1;
2519
2520         FreeLibrary( ras_handle );
2521         rasip = inet_addr((const char *)projection.szIpAddress);
2522         if(rasip==INADDR_NONE){
2523                 return INADDR_ANY;
2524         }
2525
2526         //The ip of the RAS connection
2527         return rasip;
2528 }
2529 #else
2530 unsigned int psnet_ras_status()
2531 {
2532         STUB_FUNCTION;
2533
2534         return INADDR_ANY;
2535 }
2536 #endif
2537
2538 // functions to get the status of a RAS connection
2539 /*
2540 void psnet_ras_status()
2541 {
2542         int rval;
2543         unsigned long size, num_connections, i;
2544         RASCONN rasbuffer[25];
2545         HINSTANCE ras_handle;
2546
2547         Ras_connected = 0;
2548
2549         // first, call a LoadLibrary to load the RAS api
2550         ras_handle = LoadLibrary( NOX("rasapi32.dll") );
2551         if ( ras_handle == NULL ) {
2552                 return;
2553         }
2554
2555         pRasEnumConnections = (DWORD (__stdcall *)(LPRASCONN, LPDWORD, LPDWORD))GetProcAddress(ras_handle, NOX("RasEnumConnectionsA"));
2556         if (!pRasEnumConnections)       {
2557                 FreeLibrary( ras_handle );
2558                 return;
2559         }
2560         pRasGetConnectStatus = (DWORD (__stdcall *)(HRASCONN, LPRASCONNSTATUS))GetProcAddress(ras_handle, NOX("RasGetConnectStatusA"));
2561         if (!pRasGetConnectStatus)      {
2562                 FreeLibrary( ras_handle );
2563                 return;
2564         }
2565         pRasGetProjectionInfo = (DWORD (__stdcall *)(HRASCONN, RASPROJECTION, LPVOID, LPDWORD))GetProcAddress(ras_handle, NOX("RasGetProjectionInfoA"));
2566         if (!pRasGetProjectionInfo)     {
2567                 FreeLibrary( ras_handle );
2568                 return;
2569         }
2570
2571         size = sizeof(rasbuffer);
2572         rasbuffer[0].dwSize = sizeof(RASCONN);
2573
2574         rval = pRasEnumConnections( rasbuffer, &size, &num_connections );
2575         if ( rval ) {
2576                 FreeLibrary( ras_handle );
2577                 return;
2578         }
2579
2580         // JAS: My computer gets to this point, but I have no RAS connections,
2581         // so just exit
2582         if ( num_connections < 1 )      {
2583                 ml_printf("Found no connections\n" );
2584                 FreeLibrary( ras_handle );
2585                 return;
2586         }
2587
2588         ml_printf("Found %d connections\n", num_connections);
2589
2590         for (i = 0; i < num_connections; i++ ) {
2591                 RASCONNSTATUS status;
2592                 RASPPPIP projection;
2593                 unsigned long size;
2594
2595                 ml_printf("Connection %d:\n", i);
2596                 ml_printf("Entry Name: %s\n", rasbuffer[i].szEntryName);
2597                 ml_printf("Device Type: %s\n", rasbuffer[i].szDeviceType);
2598                 ml_printf("Device Name: %s\n", rasbuffer[i].szDeviceName);
2599
2600                 // get the connection status
2601                 status.dwSize = sizeof(RASCONNSTATUS);
2602                 rval = pRasGetConnectStatus(rasbuffer[i].hrasconn, &status);
2603                 if ( rval != 0 ) {
2604                         FreeLibrary( ras_handle );
2605                         return;
2606                 }
2607
2608                 ml_printf("\tStatus: %s\n", (status.rasconnstate==RASCS_Connected)?"Connected":"Not Connected");
2609
2610                 // get the projection informatiom
2611                 size = sizeof(projection);
2612                 projection.dwSize = size;
2613                 rval = pRasGetProjectionInfo(rasbuffer[i].hrasconn, RASP_PppIp, &projection, &size );
2614                 if ( rval != 0 ) {
2615                         FreeLibrary( ras_handle );
2616                         return;
2617                 }
2618
2619                 ml_printf("IP Address: %s", projection.szIpAddress));
2620         }
2621
2622         Ras_connected = 1;
2623
2624         FreeLibrary( ras_handle );
2625 }
2626 */
2627
2628 // set some options on a socket
2629 void psnet_socket_options( SOCKET sock )
2630 {
2631         int broadcast;//, ret;
2632 #ifndef PLAT_UNIX
2633         int cursize, cursizesize, bufsize;
2634 #else
2635         socklen_t cursize, cursizesize, bufsize;
2636 #endif
2637
2638         // Set the mode of the socket to allow broadcasting.  We need to be able to broadcast
2639         // when a game is searched for in IPX mode.
2640         broadcast = 1;
2641         if(setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&broadcast, sizeof(broadcast) )){
2642                 Can_broadcast = 0;
2643         } else {
2644                 Can_broadcast = 1;
2645         }
2646
2647         // reuseaddr
2648         // setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&broadcast, sizeof(broadcast) );
2649
2650         // try and increase the size of my receive buffer
2651         bufsize = MAX_RECEIVE_BUFSIZE;
2652
2653         // set the current size of the receive buffer
2654         cursizesize = sizeof(int);
2655         getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&cursize, &cursizesize);
2656         // for ( trysize = bufsize; trysize >= cursize; trysize >>= 1 ) {
2657         /*ret =*/ setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&bufsize, sizeof(bufsize));
2658         /*if ( ret == SOCKET_ERROR ) {
2659                 int wserr;
2660
2661                 wserr = WSAGetLastError();
2662                 // if ( (wserr == WSAENOPROTOOPT) || (wserr == WSAEINVAL) )
2663                         // break;
2664         }*/
2665         // }
2666         getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&cursize, &cursizesize);
2667         ml_printf("Receive buffer set to %d\n", cursize);
2668
2669         // set the current size of the send buffer
2670         cursizesize = sizeof(int);
2671         getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&cursize, &cursizesize);
2672         // for ( trysize = bufsize; trysize >= cursize; trysize >>= 1 ) {
2673         /*ret =*/ setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&bufsize, sizeof(bufsize));
2674         /*if ( ret == SOCKET_ERROR ) {
2675                 int wserr;
2676
2677                 wserr = WSAGetLastError();
2678                 // if ( (wserr == WSAENOPROTOOPT) || (wserr == WSAEINVAL) ){
2679                         // break;
2680                 // }
2681         }*/
2682         getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&cursize, &cursizesize);
2683         ml_printf("Send buffer set to %d\n", cursize);
2684 }
2685
2686 // initialize ipx socket
2687 int psnet_init_ipx()
2688 {
2689 #ifdef PLAT_UNIX
2690         return 0;
2691 #else
2692         SOCKADDR_IPX sockaddr;
2693
2694         IPX_socket = INVALID_SOCKET;
2695
2696         IPX_socket = socket( AF_IPX, SOCK_DGRAM, NSPROTO_IPX );
2697         if ( IPX_socket == INVALID_SOCKET ) {
2698                 Ipx_failure_code = WSAGetLastError();
2699                 ml_printf("Error on IPX startup %d\n", Ipx_failure_code);
2700                 return 0;
2701         }
2702
2703         // bind the socket
2704         memset(&sockaddr,0,sizeof(SOCKADDR_IPX));
2705         sockaddr.sa_family = AF_IPX;
2706         sockaddr.sa_socket = htons( Psnet_default_port );
2707         if ( bind(IPX_socket, (struct sockaddr*)&sockaddr, sizeof (SOCKADDR_IPX)) == SOCKET_ERROR) {
2708                 Ipx_failure_code = WSAGetLastError();
2709                 ml_printf("Couldn't bind IPX socket (%d)! Invalidating IPX\n", Ipx_failure_code );
2710                 return 0;
2711         }
2712
2713         // set socket options
2714         psnet_socket_options( IPX_socket );
2715         Ipx_can_broadcast = Can_broadcast;
2716
2717         // success
2718         return 1;
2719 #endif
2720 }
2721
2722 // initialize tcp socket
2723 int psnet_init_tcp()
2724 {
2725         struct sockaddr_in sockaddr;
2726
2727         TCP_socket = INVALID_SOCKET;
2728
2729         TCP_socket = socket( AF_INET, SOCK_DGRAM, 0 );
2730         if ( TCP_socket == (int)INVALID_SOCKET ) {
2731                 Tcp_failure_code = WSAGetLastError();
2732                 ml_printf("Error on TCP startup %d\n", Tcp_failure_code);
2733                 return 0;
2734         }
2735
2736         // bind the socket
2737         memset(&sockaddr,0,sizeof(struct sockaddr_in));
2738         sockaddr.sin_family = AF_INET;
2739         sockaddr.sin_addr.s_addr = psnet_get_ip();
2740         sockaddr.sin_port = htons( Psnet_default_port );
2741         if ( bind(TCP_socket, (struct sockaddr*)&sockaddr, sizeof (sockaddr)) == SOCKET_ERROR) {
2742                 Tcp_failure_code = WSAGetLastError();
2743                 ml_printf("Couldn't bind TCP socket (%d)! Invalidating TCP\n", Tcp_failure_code );
2744                 return 0;
2745         }
2746
2747         // set socket options
2748         psnet_socket_options( TCP_socket );
2749         Tcp_can_broadcast = Can_broadcast;
2750
2751         // success
2752         return 1;
2753 }
2754
2755 // get time in seconds
2756 float psnet_get_time()
2757 {
2758         return (float)timer_get_milliseconds() / 1000.0f;
2759 }
2760
2761 // mark a socket as having received data
2762 void psnet_mark_received(PSNET_SOCKET_RELIABLE socket)
2763 {
2764         // valid socket?
2765         if((socket == 0xffffffff) || (socket >= MAXRELIABLESOCKETS)){
2766                 return;
2767         }
2768
2769         // mark it
2770         Reliable_sockets[socket].last_packet_received = psnet_get_time();
2771 }
2772
2773 #endif  //  if PSNET2
2774