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 <winsock2.h>
 149 #include <ras.h>
 150 #include <raserror.h>
 151 #else
 152 #include <sys/types.h>
 153 #include <sys/socket.h>
 154 #include <netinet/in.h>
 155 #include <arpa/inet.h>
 156 #include <netdb.h>
 157 #include <errno.h>
 158 #endif
 159 #include <stdio.h>
 160 #include <limits.h>
 161
 162 #include "pstypes.h"
 163 #include "psnet.h"
 164 #include "multi.h"
 165 #include "multiutil.h"
 166 #include "multilag.h"
 167 #include "osregistry.h"
 168 #include "timer.h"
 169 #include "multi_log.h"
 170 #include "multi_rate.h"
 171 #include "cmdline.h"
 172
 173 #ifdef PSNET2
 174
 175 // -------------------------------------------------------------------------------------------------------
 176 // PSNET 2 DEFINES/VARS
 177 //
 178
 179 int             Psnet_my_addr_valid;
 180 net_addr_t Psnet_my_addr;
 181
 182 const ubyte Null_address[4] = { 0x00, 0x00, 0x00, 0x00 };
 183
 184 int Socket_type;
 185 int Can_broadcast;                      // can we do broadcasting on our socket?
 186 int Tcp_can_broadcast = 0;
 187
 188 int Tcp_active = 0;
 189
 190 int Network_status;
 191 int Tcp_failure_code = 0;
 192 int Ras_connected;
 193 int Psnet_connection;
 194
 195 ushort  Psnet_default_port;
 196
 197 // specified their internet connnection type
 198 #define NETWORK_CONNECTION_NONE                 1
 199 #define NETWORK_CONNECTION_DIALUP               2
 200 #define NETWORK_CONNECTION_LAN                  3
 201
 202 // defines and variables to indicate network connection status
 203 #define NETWORK_STATUS_NOT_INITIALIZED  1
 204 #define NETWORK_STATUS_NO_WINSOCK               2                       // winsock failed to initialize
 205 #define NETWORK_STATUS_NO_PROTOCOL              3                       // TCP/IP doesn't appear to be loaded
 206 #define NETWORK_STATUS_NO_RELIABLE              4
 207 #define NETWORK_STATUS_RUNNING                  5                       // everything should be running
 208
 209 // defintion of structures that actually leave this machine.  psnet_send give us only
 210 // the data that we want to send.  We will add a header onto this data (packet sequence
 211 // number, possibly a checksum).  We must include a 2 byte flags variable into both structure
 212 // since the receiving end of this packet must know whether or not to checksum the packet.
 213
 214 #define MAX_TOP_LAYER_PACKET_SIZE                       680
 215
 216 // use the pack pragma to pack these structures to 2 byte aligment.  Really only needed for
 217 // the naked packet.
 218 #define MAX_PACKET_BUFFERS              75
 219
 220 #ifndef PLAT_UNIX
 221 #pragma pack(push, 2)
 222 #endif
 223
 224 // definition for a non-checksum packet
 225 typedef struct network_packet
 226 {
 227         int             sequence_number;
 228         ushort  flags;
 229         ubyte           data[MAX_TOP_LAYER_PACKET_SIZE];
 230 } network_naked_packet;
 231
 232 // structure definition for our packet buffers
 233 typedef struct network_packet_buffer
 234 {
 235         int             sequence_number;
 236         int             len;
 237         net_addr_t      from_addr;
 238         ubyte           data[MAX_TOP_LAYER_PACKET_SIZE];
 239 } network_packet_buffer;
 240
 241 // struct for a bunch of network packet buffers
 242 typedef struct network_packet_buffer_list {
 243         network_packet_buffer psnet_buffers[MAX_PACKET_BUFFERS];
 244         int psnet_seq_number;
 245         int psnet_lowest_id;
 246         int psnet_highest_id;
 247 } network_packet_buffer_list;
 248
 249 #ifndef PLAT_UNIX
 250 #pragma pack(pop)
 251 #endif
 252
 253
 254 #define MAXHOSTNAME                     128
 255
 256 #define MAX_RECEIVE_BUFSIZE     4096    // 32 K, eh?
 257 #define MAX_SEND_RETRIES                20                      // number of retries when sending would block
 258 #define MAX_LINGER_TIME                 0                       // in seconds -- when lingering to close a socket
 259
 260 //Reliable UDP stuff
 261 //*******************************
 262 #define MAXNETBUFFERS                   150             // Maximum network buffers (For between network and upper level functions, which is
 263                                                                                                         // required in case of out of order packets
 264 #define NETRETRYTIME                            0.75f           // Time after sending before we resend
 265 #define MIN_NET_RETRYTIME               0.2f
 266 #define NETTIMEOUT                              30                      // Time after receiving the last packet before we drop that user
 267 #define NETHEARTBEATTIME                3                       // How often to send a heartbeat
 268 #define MAXRELIABLESOCKETS              40                      // Max reliable sockets to open at once...
 269 #define NETBUFFERSIZE                   600             // Max size of a network packet
 270
 271 #define RELIABLE_CONNECT_TIME           7               // how long we'll wait for a response when doing a reliable connect
 272
 273 int Nettimeout = NETTIMEOUT;
 274
 275 // Reliable packet stuff
 276 #define RNT_ACK                         1                               // ACK Packet
 277 #define RNT_DATA                                2                               // Data Packet
 278 #define RNT_DATA_COMP           3                               // Compressed Data Packet
 279 #define RNT_REQ_CONN                    4                               // Requesting a connection
 280 #define RNT_DISCONNECT          5                               // Disconnecting a connection
 281 #define RNT_HEARTBEAT           6                               // Heartbeat -- send every NETHEARTBEATTIME
 282 #define RNT_I_AM_HERE           7
 283
 284 #ifndef PLAT_UNIX
 285 #pragma pack(push,r_udp)
 286 #pragma pack(1)
 287 #define PACKED
 288 #else
 289 #define PACKED __attribute__((packed))
 290 #endif
 291
 292 typedef struct {
 293         ubyte                   type;                                   // packet type
 294         ubyte                   compressed;                     //
 295         ushort          seq;                                    // sequence packet 0-65535 used for ACKing also
 296         ushort          data_len;                       // length of data
 297         float                   send_time;                      // Time the packet was sent, if an ACK the time the packet being ACK'd was sent.
 298         ubyte           data[NETBUFFERSIZE];    // Packet data
 299 } PACKED reliable_header;
 300
 301 #define RELIABLE_PACKET_HEADER_ONLY_SIZE (sizeof(reliable_header)-NETBUFFERSIZE)
 302 #define MAX_PING_HISTORY        10
 303
 304 typedef struct {
 305         ubyte buffer[NETBUFFERSIZE];
 306
 307 } PACKED reliable_net_sendbuffer;
 308
 309 typedef struct {
 310         ubyte buffer[NETBUFFERSIZE];
 311 } PACKED reliable_net_rcvbuffer;
 312
 313 typedef struct {
 314         reliable_net_sendbuffer *sbuffers[MAXNETBUFFERS];       // This is an array of pointers for quick sorting
 315         unsigned short ssequence[MAXNETBUFFERS];                                // This is the sequence number of the given packet
 316         float timesent[MAXNETBUFFERS];
 317         int send_len[MAXNETBUFFERS];
 318         reliable_net_rcvbuffer  *rbuffers[MAXNETBUFFERS];
 319         int recv_len[MAXNETBUFFERS];
 320         unsigned short rsequence[MAXNETBUFFERS];                                // This is the sequence number of the given packet
 321         float last_packet_received;                                                             // For a given connection, this is the last packet we received
 322         float last_packet_sent;
 323         struct sockaddr addr;                                                                                                   // struct sockaddr of our peer
 324         ushort status;                                                                                                  // Status of this connection
 325         unsigned short oursequence;                                                             // This is the next sequence number the application is expecting
 326         unsigned short theirsequence;                                                           // This is the next sequence number the peer is expecting
 327         net_addr_t      net_addr;                                                                                       // A FS2 network address structure
 328         ubyte connection_type;                                                                          // IP, modem, etc.
 329         float pings[MAX_PING_HISTORY];
 330         ubyte ping_pos;
 331         unsigned int num_ping_samples;
 332         float mean_ping;
 333 } reliable_socket;
 334
 335 reliable_socket Reliable_sockets[MAXRELIABLESOCKETS];
 336
 337 // socket TCP (unreliable)
 338 SOCKET TCP_socket;
 339
 340 // the sockets that the game will use when selecting network type
 341 SOCKET Unreliable_socket = INVALID_SOCKET;
 342
 343 // blah
 344 // SOCKET Reliable_UDP_socket = INVALID_SOCKET;
 345
 346 float First_sent_iamhere = 0;
 347 float Last_sent_iamhere = 0;
 348
 349 #define CONNECTSEQ 0x142                                                                                // Magic number for starting a connection, just so it isn't 0
 350
 351 unsigned int Serverconn = 0xffffffff;
 352
 353 #ifndef PLAT_UNIX
 354 #pragma pack(pop,r_udp)
 355 #endif
 356 #undef PACKED
 357
 358 //*******************************
 359
 360 // top layer buffers
 361 network_packet_buffer_list Psnet_top_buffers[PSNET_NUM_TYPES];
 362
 363 // -------------------------------------------------------------------------------------------------------
 364 // PSNET 2 FORWARD DECLARATIONS
 365 //
 366
 367 // if the string is a legally formatted ip string
 368 int psnet_is_valid_numeric_ip(char *ip);
 369
 370 // functions to get the status of a RAS connection
 371 unsigned int psnet_ras_status();
 372
 373 // set some options on a socket
 374 void psnet_socket_options( SOCKET sock );
 375
 376 // initialize tcp socket
 377 int psnet_init_tcp();
 378
 379 // get time in seconds
 380 float psnet_get_time();
 381
 382 // returns the ip address of this machine. use for calling bind() with to associate with the proper
 383 // IP address and network device.
 384 int psnet_get_ip();
 385
 386 // initialize reliable sockets
 387 int psnet_init_rel_tcp(int port, int should_listen);
 388
 389 // shutdown reliable sockets
 390 void psnet_rel_close();
 391
 392 // initialize the buffering system
 393 void psnet_buffer_init(network_packet_buffer_list *l);
 394
 395 // buffer a packet (maintain order!)
 396 void psnet_buffer_packet(network_packet_buffer_list *l, ubyte *data, int length, net_addr_t *from);
 397
 398 // get the index of the next packet in order!
 399 int psnet_buffer_get_next(network_packet_buffer_list *l, ubyte *data, int *length, net_addr_t *from);
 400
 401
 402 // -------------------------------------------------------------------------------------------------------
 403 // PSNET 2 TOP LAYER FUNCTIONS - these functions simply buffer and store packets based upon type (see PSNET_TYPE_* defines)
 404 //
 405
 406 // wrappers around select() and recvfrom() for lagging/losing data
 407 int RECVFROM(SOCKET s, char *buf, int len, int flags, sockaddr *from, int *fromlen, int psnet_type)
 408 {
 409         network_packet_buffer_list *l;
 410         net_addr_t addr;
 411         int ret;
 412         int ret_len;
 413
 414         // bad type
 415         SDL_assert((psnet_type >= 0) && (psnet_type < PSNET_NUM_TYPES));
 416         if((psnet_type < 0) || (psnet_type >= PSNET_NUM_TYPES)){
 417                 return -1;
 418         }
 419         l = &Psnet_top_buffers[psnet_type];
 420
 421         // if we have no buffer! The user should have made sure this wasn't the case by calling SELECT()
 422         ret = psnet_buffer_get_next(l, (ubyte*)buf, &ret_len, &addr);
 423         if(!ret){
 424                 Int3();
 425                 return -1;
 426         }
 427
 428         // otherwise, stuff the outgoing data
 429         ((struct sockaddr_in*)from)->sin_port = htons(addr.port);
 430         memcpy(&((struct sockaddr_in*)from)->sin_addr.s_addr, addr.addr, 4);
 431         ((struct sockaddr_in*)from)->sin_family = AF_INET;
 432         *fromlen = sizeof(struct sockaddr_in);
 433
 434         // return bytes read
 435         return ret_len;
 436 }
 437
 438 // wrappers around select() and recvfrom() for lagging/losing data
 439 int SELECT(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout, int psnet_type)
 440 {
 441         network_packet_buffer_list *l;
 442
 443         // if this is a check for writability, just return the select
 444         if(writefds != NULL){
 445                 return select(nfds, readfds, writefds, exceptfds, timeout);
 446         }
 447
 448         // bad type
 449         SDL_assert((psnet_type >= 0) && (psnet_type < PSNET_NUM_TYPES));
 450         if((psnet_type < 0) || (psnet_type >= PSNET_NUM_TYPES)){
 451                 return -1;
 452         }
 453         l = &Psnet_top_buffers[psnet_type];
 454
 455         // do we have any buffers in here?
 456         if((l->psnet_lowest_id == -1) || (l->psnet_lowest_id > l->psnet_highest_id)){
 457                 return 0;
 458         }
 459
 460         // yo
 461         return 1;
 462 }
 463
 464 // wrappers around sendto to sorting through different packet types
 465 int SENDTO(SOCKET s, char * buf, int len, int flags, sockaddr *to, int tolen, int psnet_type)
 466 {
 467         char outbuf[MAX_TOP_LAYER_PACKET_SIZE + 150];
 468
 469         // stuff type
 470         outbuf[0] = (char)psnet_type;
 471         memcpy(&outbuf[1], buf, len);
 472
 473         // is the socket writeable?
 474
 475         // send it
 476         return sendto(s, outbuf, len + 1, flags, (struct sockaddr*)to, tolen);
 477 }
 478
 479 // call this once per frame to read everything off of our socket
 480 void PSNET_TOP_LAYER_PROCESS()
 481 {
 482         // read socket stuff
 483         struct sockaddr_in ip_addr;                             // UDP/TCP socket structure
 484         fd_set  rfds;
 485         timeval timeout;
 486         int read_len;
 487         SOCKLEN_T from_len;
 488         net_addr_t      from_addr;
 489         network_naked_packet packet_read;
 490
 491         // clear the addresses to remove compiler warnings
 492         memset(&ip_addr, 0, sizeof(struct sockaddr_in));
 493
 494         if ( Network_status != NETWORK_STATUS_RUNNING ) {
 495                 ml_printf("Network ==> socket not inited in PSNET_TOP_LAYER_PROCESS\n");
 496                 return;
 497         }
 498
 499         while ( 1 ) {
 500                 // check if there is any data on the socket to be read.  The amount of data that can be
 501                 // atomically read is stored in len.
 502
 503                 FD_ZERO(&rfds);
 504                 FD_SET( Unreliable_socket, &rfds );
 505                 timeout.tv_sec = 0;
 506                 timeout.tv_usec = 0;
 507
 508                 if ( select( Unreliable_socket+1, &rfds, NULL, NULL, &timeout) == SOCKET_ERROR ) {
 509                         ml_printf("Error %d doing a socket select on read\n", WSAGetLastError());
 510                         break;
 511                 }
 512
 513                 // if the read file descriptor is not set, then bail!
 514                 if ( !FD_ISSET(Unreliable_socket, &rfds) ){
 515                         return;
 516                 }
 517
 518                 // get data off the socket and process
 519                 from_len = sizeof(struct sockaddr_in);
 520                 read_len = recvfrom( Unreliable_socket, (char*)packet_read.data, MAX_TOP_LAYER_PACKET_SIZE, 0,  (struct sockaddr*)&ip_addr, &from_len);
 521
 522                 // set the from_addr for storage into the packet buffer structure
 523                 from_addr.type = Socket_type;
 524                 from_addr.port = ntohs( ip_addr.sin_port );
 525                 memcpy(from_addr.addr, &ip_addr.sin_addr.s_addr, 4);
 526
 527                 if ( read_len == SOCKET_ERROR ) {
 528                         // int x = WSAGetLastError();
 529                         ml_printf("Socket error on socket_get_data()");
 530                         break;
 531                 }
 532
 533                 // determine the packet type
 534                 int packet_type = packet_read.data[0];
 535                 // mprintf(("TOP LAYER PACKET  %d!\n", packet_type));
 536                 if((packet_type < 0) || (packet_type >= PSNET_NUM_TYPES)){
 537                         Int3();
 538                 } else {
 539                         // buffer the packet
 540                         psnet_buffer_packet(&Psnet_top_buffers[packet_type], packet_read.data + 1, read_len - 1, &from_addr);
 541                 }
 542         }
 543 }
 544
 545
 546 // -------------------------------------------------------------------------------------------------------
 547 // PSNET 2 FUNCTIONS
 548 //
 549
 550 // initialize psnet to use the specified port
 551 void psnet_init( int protocol, int port_num )
 552 {
 553         const char *internet_connection;
 554 #ifndef PLAT_UNIX
 555         WSADATA wsa_data;
 556 #endif
 557         int idx;
 558         Tcp_active = 0;
 559
 560 #if defined(DEMO) || defined(OEM_BUILD) // not for FS2_DEMO
 561         return;
 562 #endif
 563
 564         // GAME PORT INITIALIZATION STUFF
 565         if ( Network_status == NETWORK_STATUS_RUNNING ){
 566                 ml_string("Skipping psnet_init() because network already running");
 567                 return;
 568         }
 569
 570         // 'lan' should be a safe default in 2015
 571         internet_connection = os_config_read_string("Network", "NetworkConnection", "LAN");
 572
 573         if ( !SDL_strcasecmp(internet_connection, NOX("dialup")) ) {
 574                 ml_string("psnet_init() detected dialup connection");
 575
 576                 Psnet_connection = NETWORK_CONNECTION_DIALUP;
 577         } else if ( !SDL_strcasecmp(internet_connection, NOX("lan")) ) {
 578                 ml_string("psnet_init() detected lan connection");
 579
 580                 Psnet_connection = NETWORK_CONNECTION_LAN;
 581         } else {
 582                 ml_string("psnet_init() detected no connection");
 583
 584                 Psnet_connection = NETWORK_CONNECTION_NONE;
 585         }
 586
 587         Network_status = NETWORK_STATUS_NO_WINSOCK;
 588 #ifndef PLAT_UNIX
 589         if (WSAStartup(0x101, &wsa_data )){
 590                 return;
 591         }
 592 #endif
 593
 594         // get the port for running this game on.  Be careful that it cannot be out of bounds
 595         Psnet_default_port = DEFAULT_GAME_PORT;
 596         if ( (port_num > 1023) && (port_num < USHRT_MAX) ) {
 597                 Psnet_default_port = (ushort)port_num;
 598         }
 599
 600         // initialize TCP now
 601         Tcp_active = 1;
 602         if(!psnet_init_tcp()){
 603                 ml_printf("Error on TCP startup %d\n", Tcp_failure_code);
 604
 605                 Tcp_active = 0;
 606         } else {
 607                 if(!psnet_init_rel_tcp(Psnet_default_port + 1, 0)){
 608                         ml_printf("Network", "Error on TCP startup %d\n", Tcp_failure_code);
 609
 610                         Tcp_active = 0;
 611                 }
 612         }
 613
 614         // clear reliable sockets
 615         reliable_socket *rsocket;
 616         int j;
 617         for(j=0; j<MAXRELIABLESOCKETS; j++){
 618                 rsocket=&Reliable_sockets[j];
 619                 memset(rsocket,0,sizeof(reliable_socket));
 620         }
 621
 622         // determine if we've successfully initialized the protocol we want
 623         if ( !Tcp_active ) {
 624                 Network_status = NETWORK_STATUS_NO_PROTOCOL;
 625
 626                 ml_string("No protocol in psnet_init()!");
 627         }
 628
 629         // specified network timeout
 630         Nettimeout = NETTIMEOUT;
 631         if(Cmdline_timeout > 0){
 632                 Nettimeout = Cmdline_timeout;
 633         }
 634
 635         // set ras status
 636         psnet_ras_status();
 637
 638         if(Network_status != NETWORK_STATUS_NO_PROTOCOL){
 639                 // set network to be running
 640                 Network_status = NETWORK_STATUS_RUNNING;
 641
 642                 // determine if our socket can broadcast
 643                 Can_broadcast = Tcp_can_broadcast;
 644
 645                 // initialize all packet type buffers
 646                 for(idx=0; idx<PSNET_NUM_TYPES; idx++){
 647                         psnet_buffer_init(&Psnet_top_buffers[idx]);
 648                 }
 649         }
 650 }
 651
 652 // shutdown psnet
 653 void psnet_close()
 654 {
 655         if ( Network_status != NETWORK_STATUS_RUNNING ){
 656                 return;
 657         }
 658
 659 #ifndef PLAT_UNIX
 660         WSACancelBlockingCall();
 661 #endif
 662
 663         if ( TCP_socket != (int)INVALID_SOCKET ) {
 664                 shutdown( TCP_socket, 1 );
 665                 closesocket( TCP_socket );
 666         }
 667
 668 #ifndef PLAT_UNIX
 669         if (WSACleanup())       {
 670                 //Warning( LOCATION, "Error closing wsock!\n" );
 671         }
 672 #endif
 673
 674         // close down all reliable sockets - this forces them to
 675         // send a disconnect to any remote machines
 676         psnet_rel_close();
 677
 678         Network_status = NETWORK_STATUS_NOT_INITIALIZED;
 679 }
 680
 681 // set the protocol to use
 682 int psnet_use_protocol( int protocol )
 683 {
 684         SOCKLEN_T len;
 685         struct sockaddr_in              ip_addr;
 686
 687         // zero out my address
 688         Psnet_my_addr_valid = 0;
 689         memset( &Psnet_my_addr, 0, sizeof(Psnet_my_addr) );
 690
 691         // wait until we choose a protocol to determine if we can broadcast
 692         Can_broadcast = 0;
 693
 694         ml_string("In psnet_use_protocol()");
 695
 696         if (protocol != NET_TCP) {
 697                 Int3();
 698                 return 0;
 699         }
 700
 701
 702         if ( Network_status != NETWORK_STATUS_RUNNING ){
 703                 ml_string("Network_status != NETWORK_STATUS_RUNNING in NET_TCP in psnet_use_protocol()");
 704                 return 0;
 705         }
 706
 707         // assign the TCP_* sockets to the socket values used elsewhere
 708         Unreliable_socket = TCP_socket;
 709
 710         Can_broadcast = Tcp_can_broadcast;
 711         if(Can_broadcast){
 712                 ml_printf("Psnet : TCP broadcast\n");
 713         }
 714
 715         // get the socket name, and put it into My_addr
 716         len = sizeof(struct sockaddr_in);
 717         if ( getsockname(TCP_socket, (struct sockaddr *)&ip_addr, &len) == SOCKET_ERROR ) {
 718                 ml_printf("Unable to get sock name for TCP unreliable socket (%d)\n", WSAGetLastError() );
 719
 720                 return 0;
 721         }
 722
 723         memcpy(Psnet_my_addr.addr, &ip_addr.sin_addr, 4);
 724         Psnet_my_addr.port = Psnet_default_port;
 725
 726         ml_printf("Psnet using - NET_TCP\n");
 727
 728
 729         Psnet_my_addr.type = protocol;
 730         Socket_type = protocol;
 731
 732         return 1;
 733 }
 734
 735 // get the status of the network
 736 int psnet_get_network_status()
 737 {
 738         // first case is when "none" is selected
 739         if ( Psnet_connection == NETWORK_CONNECTION_NONE ) {
 740                 return NETWORK_ERROR_NO_TYPE;
 741         }
 742
 743         // first, check the connection status of the network
 744         if ( Network_status == NETWORK_STATUS_NO_WINSOCK )
 745                 return NETWORK_ERROR_NO_WINSOCK;
 746
 747         if ( Network_status == NETWORK_STATUS_NO_PROTOCOL ){
 748                 return NETWORK_ERROR_NO_PROTOCOL;
 749         }
 750
 751         // network is running -- be sure that the RAS people know to connect if they currently cannot.
 752
 753         if ( Psnet_connection == NETWORK_CONNECTION_DIALUP ) {
 754                 // if on a dialup connection, be sure that RAS is active.
 755                 if ( !Ras_connected ) {
 756                         return NETWORK_ERROR_CONNECT_TO_ISP;
 757                 }
 758         } else if ( Psnet_connection == NETWORK_CONNECTION_LAN ) {
 759                 // if on a LAN, and they have a dialup connection active, return error to indicate that they need
 760                 // to pick the right connection type
 761                 if ( Ras_connected ) {
 762                         return NETWORK_ERROR_LAN_AND_RAS;
 763                 }
 764         }
 765         return NETWORK_ERROR_NONE;
 766 }
 767
 768 // convert a net_addr to a string
 769 char* psnet_addr_to_string( char * text, const int max_textlen, net_addr_t * address )
 770 {
 771
 772         if ( Network_status != NETWORK_STATUS_RUNNING )         {
 773                 SDL_strlcpy( text, XSTR("[no networking]",910), max_textlen );
 774                 return text;
 775         }
 776
 777         in_addr temp_addr;
 778
 779         SDL_assert(address->type == NET_TCP);
 780
 781         memcpy(&temp_addr.s_addr, address->addr, 4);
 782         SDL_strlcpy( text, inet_ntoa(temp_addr), max_textlen );
 783
 784         return text;
 785 }
 786
 787 // convert a string to a net addr
 788 void psnet_string_to_addr( net_addr_t * address, char * text, const int max_textlen )
 789 {
 790         struct hostent *he;
 791         char str[255], *c, *port;
 792         in_addr addr;
 793
 794         if ( Network_status != NETWORK_STATUS_RUNNING ) {
 795                 SDL_strlcpy( text, XSTR("[no networking]",910), max_textlen );
 796                 return;
 797         }
 798
 799         // copy the text string to local storage to look for ports
 800         SDL_assert( strlen(text) < 255 );
 801         SDL_strlcpy(str, text, SDL_arraysize(str));
 802         c = strrchr(str, ':');
 803         port = NULL;
 804         if ( c ) {
 805                 *c = '\0';
 806                 port = c+1;
 807         }
 808
 809         SDL_assert(address->type == NET_TCP);
 810
 811
 812         addr.s_addr = inet_addr(str);
 813         // if we get INADDR_NONE returns, then we need to try and resolve the host
 814         // name
 815         if ( addr.s_addr == INADDR_NONE ) {
 816                 he = gethostbyname( str );
 817                 // returns a non-null pointer if successful, so get the address
 818                 if ( he ) {
 819                         addr.s_addr = ((in_addr *)(he->h_addr))->s_addr;                        // this is the address in network byte order
 820                 } else {
 821                         addr.s_addr = INADDR_NONE;
 822                 }
 823         }
 824
 825         memcpy(address->addr, &addr.s_addr, 4);
 826
 827         if ( port ){
 828                 address->port = (ushort)(atoi(port));
 829         }
 830 }
 831
 832 // compare 2 addresses
 833 int psnet_same( net_addr_t * a1, net_addr_t * a2 )
 834 {
 835         return !memcmp(a1->addr, a2->addr, 4);
 836 }
 837
 838 // send data unreliably
 839 int psnet_send( net_addr_t * who_to, void * data, int len, int np_index )
 840 {
 841         // send data unreliably
 842         SOCKET send_sock;
 843         struct sockaddr_in sockaddr;                            // UDP/TCP socket structure
 844         int ret, send_len;
 845         ubyte iaddr[4], *send_data;
 846         short port;
 847         fd_set  wfds;
 848         struct timeval timeout;
 849
 850         // always use the reliable socket
 851         send_sock = Unreliable_socket;
 852
 853         if ( Network_status != NETWORK_STATUS_RUNNING ) {
 854                 ml_printf("Network ==> Socket not inited in psnet_send\n");
 855                 return 0;
 856         }
 857
 858         if ( psnet_same( who_to, &Psnet_my_addr) ){
 859                 return 0;
 860         }
 861
 862         if (who_to->type != NET_TCP) {
 863                 Int3();
 864                 return 0;
 865         }
 866
 867         memcpy(iaddr, who_to->addr, 4);
 868
 869         if ( memcmp(iaddr, Null_address, 4) == 0) {
 870                 ml_printf("Network ==> send to address is 0 in psnet_send\n");
 871                 return 0;
 872         }
 873
 874         port = who_to->port;
 875
 876         if ( port == 0) {
 877                 ml_printf("Network ==> destination port %d invalid in psnet_send\n", port);
 878                 return 0;
 879         }
 880
 881         // stuff the data with the type
 882         send_data = (ubyte*)data;
 883         send_len = len;
 884
 885         FD_ZERO(&wfds);
 886         FD_SET( send_sock, &wfds );
 887         timeout.tv_sec = 0;
 888         timeout.tv_usec = 0;
 889
 890         if ( SELECT( send_sock+1, NULL, &wfds, NULL, &timeout, PSNET_TYPE_UNRELIABLE) == SOCKET_ERROR ) {
 891                 ml_printf("Error on blocking select for write %d\n", WSAGetLastError() );
 892                 return 0;
 893         }
 894
 895         // if the write file descriptor is not set, then bail!
 896         if ( !FD_ISSET(send_sock, &wfds ) ){
 897                 return 0;
 898         }
 899
 900         sockaddr.sin_family = AF_INET;
 901         memcpy(&sockaddr.sin_addr.s_addr, iaddr, 4);
 902         sockaddr.sin_port = htons(port);
 903
 904         multi_rate_add(np_index, "udp(h)", send_len + UDP_HEADER_SIZE);
 905         multi_rate_add(np_index, "udp", send_len);
 906         ret = SENDTO( send_sock, (char *)send_data, send_len, 0, (struct sockaddr*)&sockaddr, sizeof(sockaddr), PSNET_TYPE_UNRELIABLE );
 907
 908         if ( ret != SOCKET_ERROR )      {
 909                 return 1;
 910         }
 911         //Warning( LOCATION, "Couldn't send data (0x%x)!\n", WSAGetLastError() );
 912         return 0;
 913 }
 914
 915 // get data from the unreliable socket
 916 int psnet_get( void * data, net_addr_t * from_addr )
 917 {
 918         int buffer_size;
 919
 920         // try and get a free buffer and return its size
 921         if(psnet_buffer_get_next(&Psnet_top_buffers[PSNET_TYPE_UNRELIABLE], (ubyte*)data, &buffer_size, from_addr)){
 922                 return buffer_size;
 923         }
 924
 925         // return nothing
 926         return 0;
 927 }
 928
 929 // broadcast data on unreliable socket
 930 int psnet_broadcast( net_addr_t * who_to, void * data, int len )
 931 {
 932         if ( Network_status != NETWORK_STATUS_RUNNING ) {
 933                 ml_printf("Network ==> Socket not inited in psnet_broadcast\n");
 934                 return 0;
 935         }
 936
 937         if ( !Can_broadcast ) {
 938                 ml_printf("Cannot broadcast -- returning without doing anything\n");
 939                 return 0;
 940         }
 941
 942         ubyte broadcast[4] = { 0xff, 0xff, 0xff, 0xff };
 943
 944         // broadcasting works on a local subnet which is all we really want to do for now anyway.
 945         // we might keep this in as an option for freespace later.
 946         memcpy(who_to->addr, broadcast, 4);
 947         psnet_send(who_to, data, len);
 948
 949         return 1;
 950 }
 951
 952 // flush all sockets
 953 void psnet_flush()
 954 {
 955         ubyte data[MAX_TOP_LAYER_PACKET_SIZE + 250];
 956         net_addr_t from_addr;
 957
 958         while ( psnet_get( data, &from_addr ) > 0 ) ;
 959 }
 960
 961 // if the passed string is a valid IP string
 962 int psnet_is_valid_ip_string( char *ip_string, int allow_port )
 963 {
 964         in_addr addr;
 965         struct hostent *host_ent;
 966         char str[255], *c;
 967
 968         // our addresses may have ports, so make local copy and remove port number
 969         SDL_assert( strlen(ip_string) < 255 );
 970         SDL_strlcpy(str, ip_string, SDL_arraysize(str));
 971         c = strrchr(str, ':');
 972         if ( c ){
 973                 *c = '\0';
 974         }
 975
 976         addr.s_addr = inet_addr(ip_string);
 977         if ( addr.s_addr != INADDR_NONE ){
 978                 // make sure the ip string is a valid format string
 979                 if(psnet_is_valid_numeric_ip(ip_string)){
 980                         return 1;
 981                 }
 982         }
 983
 984         // try name resolution
 985         host_ent = gethostbyname( ip_string );
 986         if ( !host_ent ){
 987                 return 0;
 988         }
 989
 990         // valid host entry so return 1;
 991         return 1;
 992 }
 993
 994
 995 // -------------------------------------------------------------------------------------------------------
 996 // PSNET 2 RELIABLE SOCKET FUNCTIONS
 997 //
 998
 999 // compare 2 pings
1000 int psnet_rel_ping_compare( const void *arg1, const void *arg2 )
1001 {
1002         float *ping1 = (float *)arg1;
1003         float *ping2 = (float *)arg2;
1004
1005         if(*ping1==*ping2) return 0;
1006         else if(*ping1>*ping2) return 1;
1007         else if(*ping1<*ping2) return -1;
1008
1009         return 0;
1010 }
1011
1012 void psnet_rel_send_ack(struct sockaddr *raddr, unsigned int sig, ubyte link_type, float time_sent)
1013 {
1014         int sig_tmp;
1015         reliable_header ack_header;
1016
1017         if (link_type != NET_TCP) {
1018                 Int3();
1019                 return;
1020         }
1021
1022         ack_header.type = RNT_ACK;
1023         ack_header.data_len = sizeof(unsigned int);
1024         ack_header.send_time = INTEL_FLOAT( time_sent );
1025         sig_tmp = INTEL_INT( sig );
1026         memcpy(&ack_header.data,&sig_tmp,sizeof(unsigned int));
1027
1028         if ( !Tcp_active ) {
1029                 ml_string("No TCP in rel_send_ack()");
1030                 return;
1031         }
1032
1033         SENDTO(Unreliable_socket, (char *)&ack_header, RELIABLE_PACKET_HEADER_ONLY_SIZE+sizeof(unsigned int), 0, raddr, sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1034 }
1035
1036 // function to shutdown and close the given socket.  It takes a couple of things into consideration
1037 // when closing, such as possibly reiniting reliable sockets if they are closed here.
1038 void psnet_rel_close_socket( PSNET_SOCKET_RELIABLE *sockp )
1039 {
1040         reliable_header diss_conn_header;
1041
1042         // if the socket is out of range
1043         if(*sockp>=MAXRELIABLESOCKETS)
1044         {
1045                 ml_printf("Invalid socket id passed to nw_NewCloseSocket() -- %d\n",*sockp);
1046                 return;
1047         }
1048         ml_printf("Closing socket %d\n",*sockp);
1049
1050         // go through every buffer and "free it up(tm)"
1051         int i;
1052         for(i=0;i<MAXNETBUFFERS;i++){
1053                 if(Reliable_sockets[*sockp].rbuffers[i]){
1054                         if(Reliable_sockets[*sockp].rbuffers[i] != NULL){
1055                                 free(Reliable_sockets[*sockp].rbuffers[i]);
1056                         }
1057                         Reliable_sockets[*sockp].rbuffers[i] = NULL;
1058                         Reliable_sockets[*sockp].rsequence[i] = 0;
1059                 }
1060                 if(Reliable_sockets[*sockp].sbuffers[i]){
1061                         if(Reliable_sockets[*sockp].sbuffers[i] != NULL){
1062                                 free(Reliable_sockets[*sockp].sbuffers[i]);
1063                         }
1064                         Reliable_sockets[*sockp].sbuffers[i] = NULL;
1065                         Reliable_sockets[*sockp].rsequence[i] = 0;
1066                 }
1067         }
1068
1069         // send a disconnect packet to the socket on the other end
1070         diss_conn_header.type = RNT_DISCONNECT;
1071         diss_conn_header.seq = CONNECTSEQ;
1072         diss_conn_header.data_len = 0;
1073         if(*sockp==Serverconn){
1074                 Serverconn = 0xffffffff;
1075         }
1076
1077         if (Reliable_sockets[*sockp].connection_type ==  NET_TCP) {
1078                 SDL_assert(Tcp_active);
1079                 SENDTO(Unreliable_socket, (char *)&diss_conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[*sockp].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1080         } else {
1081                 ml_printf("Unknown protocol type in nw_CloseSocket()!\n");
1082                 // Int3();
1083         }
1084
1085         memset(&Reliable_sockets[*sockp],0,sizeof(reliable_socket));
1086         Reliable_sockets[*sockp].status = RNF_UNUSED;
1087 }
1088
1089 // function to check the status of the reliable socket and try to re-initialize it if necessary.
1090 // win95 seems to have trouble doing a reinit of the socket immediately after close, so this
1091 // function exists to check the status, and reinitialize if we need to
1092 int psnet_rel_check()
1093 {
1094         return 1;
1095 }
1096
1097 // send data reliably
1098 int psnet_rel_send(PSNET_SOCKET_RELIABLE socketid, ubyte *data, int length, int np_index)
1099 {
1100         int i;
1101         int bytesout = 0;
1102         reliable_socket *rsocket;
1103
1104         if(socketid >= MAXRELIABLESOCKETS){
1105                 ml_printf("Invalid socket id passed to psnet_rel_send() -- %d\n",socketid);
1106                 return -1;
1107         }
1108
1109         SDL_assert( length < (int)(sizeof(reliable_header)) );
1110         psnet_rel_work();
1111
1112         rsocket=&Reliable_sockets[socketid];
1113         if(rsocket->status!=RNF_CONNECTED) {
1114                 //We can't send because this isn't a connected reliable socket.
1115                 ml_printf("Can't send packet because of status %d in nw_SendReliable(). socket = %d\n",rsocket->status,socketid);
1116                 return -1;
1117         }
1118
1119         // Add the new packet to the sending list and send it.
1120         for(i=0;i<MAXNETBUFFERS;i++){
1121                 if(NULL==rsocket->sbuffers[i]){
1122                         reliable_header send_header;
1123                         int send_this_packet=1;
1124
1125                         rsocket->send_len[i] = length;
1126                         rsocket->sbuffers[i] = (reliable_net_sendbuffer *)malloc(sizeof(reliable_net_sendbuffer));
1127
1128                         memcpy(rsocket->sbuffers[i]->buffer,data,length);
1129
1130                         send_header.seq = INTEL_SHORT( rsocket->theirsequence );
1131                         rsocket->ssequence[i] = rsocket->theirsequence;
1132
1133                         memcpy(send_header.data,data,length);
1134                         send_header.data_len = INTEL_SHORT( (ushort)length );
1135                         send_header.type = RNT_DATA;
1136                         send_header.send_time = psnet_get_time();
1137                         send_header.send_time = INTEL_FLOAT( send_header.send_time );
1138                         // struct sockaddr_in * rsockaddr = (struct sockaddr_in *)&rsocket->addr;
1139
1140                         if (send_this_packet){
1141                                 if (rsocket->connection_type == NET_TCP) {
1142                                         SDL_assert(Tcp_active);
1143                                         multi_rate_add(np_index, "tcp(h)", RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i]);
1144                                         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);
1145                                 } else {
1146                                         ml_printf("Unknown protocol type in nw_SendReliable()!\n");
1147                                         Int3();
1148                                 }
1149                         }
1150                         int error = WSAGetLastError();
1151                         if((bytesout==SOCKET_ERROR)&&NETCALL_WOULDBLOCK(error)){
1152                                 //This will cause it to try to send again next frame. (or sooner)
1153                                 rsocket->timesent[i] = psnet_get_time()-(NETRETRYTIME*4);
1154                         } else {
1155                                 rsocket->timesent[i] = psnet_get_time();
1156                         }
1157
1158
1159                         rsocket->theirsequence++;
1160                         return bytesout;
1161                 }
1162         }
1163         ml_printf("PSNET RELIABLE SEND BUFFER OVERRUN. socket = %d\n",socketid);
1164         // Int3();
1165         return 0;
1166 }
1167
1168 // Return codes:
1169 // -1 socket not connected
1170 // 0 No packet ready to receive
1171 // >0 Buffer filled with the number of bytes recieved
1172 int psnet_rel_get(PSNET_SOCKET socketid, ubyte *buffer, int max_len)
1173 {
1174         int i;
1175
1176         reliable_socket *rsocket = NULL;
1177         psnet_rel_work();
1178         if(socketid >= MAXRELIABLESOCKETS){
1179                 ml_printf("Invalid socket id passed to nw_NewReceiveReliable() -- %d\n",socketid);
1180                 return -1;
1181         }
1182         rsocket = &Reliable_sockets[socketid];
1183         if( (RNF_CONNECTED!=rsocket->status) && (RNF_LIMBO!=rsocket->status) ){
1184                 ml_printf("Can't receive packet because it isn't connected in nw_ReceiveReliable(). socket = %d\n",socketid);
1185                 return 0;
1186         }
1187         //If the buffer position is the position we are waiting for, fill in
1188         //the buffer we received in the call to this function and return true
1189
1190         for(i=0; i<MAXNETBUFFERS; i++){
1191                 if((rsocket->rsequence[i] == rsocket->oursequence) && rsocket->rbuffers[i]){
1192                         memcpy(buffer,rsocket->rbuffers[i]->buffer, rsocket->recv_len[i]);
1193                         free(rsocket->rbuffers[i]);
1194                         rsocket->rbuffers[i] = NULL;
1195                         rsocket->rsequence[i] = 0;
1196                         rsocket->oursequence++;
1197                         return rsocket->recv_len[i];
1198                 }
1199         }
1200
1201         return 0;
1202 }
1203
1204 // process all active reliable sockets
1205 void psnet_rel_work()
1206 {
1207         int i,j;
1208         int rcode = -1;
1209         int max_len = NETBUFFERSIZE;
1210         fd_set read_fds;
1211         struct timeval timeout;
1212         static reliable_header rcv_buff;
1213         static struct sockaddr rcv_addr;
1214         int bytesin = 0;
1215         int addrlen = sizeof(struct sockaddr);
1216         timeout.tv_sec=0;
1217         timeout.tv_usec=0;
1218
1219         PSNET_TOP_LAYER_PROCESS();
1220
1221         // negotitate initial connection with the server
1222         reliable_socket *rsocket = NULL;
1223         if(Serverconn != 0xffffffff){
1224                 //Check to see if we need to send a packet out.
1225                 if((Reliable_sockets[Serverconn].status==RNF_LIMBO) && ((Serverconn != 0xffffffff) && fl_abs((psnet_get_time() - Last_sent_iamhere))>NETRETRYTIME) ){
1226                         reliable_header conn_header;
1227                         //Now send I_AM_HERE packet
1228                         conn_header.type = RNT_I_AM_HERE;
1229                         conn_header.seq = (ushort)(~CONNECTSEQ);
1230                         conn_header.data_len = 0;
1231                         Last_sent_iamhere = psnet_get_time();
1232                         int ret = SOCKET_ERROR;
1233
1234                         if (Reliable_sockets[Serverconn].connection_type == NET_TCP) {
1235                                 SDL_assert(Tcp_active);
1236                                 ret = SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[Serverconn].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1237                         }
1238
1239                         int error = WSAGetLastError();
1240                         if((ret == SOCKET_ERROR) && NETCALL_WOULDBLOCK(error)){
1241                                 Reliable_sockets[Serverconn].last_packet_sent = psnet_get_time()-NETRETRYTIME;
1242                         } else {
1243                                 Reliable_sockets[Serverconn].last_packet_sent = psnet_get_time();
1244                         }
1245                 }
1246         }
1247
1248         ubyte link_type;
1249         net_addr_t d3_rcv_addr;
1250         struct sockaddr_in *rcvaddr;
1251         int udp_has_data = 0;
1252         do {
1253                 rsocket = NULL;
1254                 //Check UDP
1255                 FD_ZERO(&read_fds);
1256                 FD_SET(Unreliable_socket, &read_fds);
1257
1258                 udp_has_data = SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_RELIABLE);
1259
1260                 if (udp_has_data <= 0) {
1261                         break;
1262                 }
1263
1264                 addrlen = sizeof(struct sockaddr);
1265                 struct sockaddr_in *tcp_addr = (struct sockaddr_in *)&rcv_addr;
1266                 memset(&d3_rcv_addr,0,sizeof(net_addr_t));
1267                 memset(&rcv_addr,0,sizeof(struct sockaddr));
1268                 bytesin = RECVFROM(Unreliable_socket, (char *)&rcv_buff,sizeof(reliable_header), 0, (struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1269                 rcv_buff.seq = INTEL_SHORT( rcv_buff.seq );
1270                 rcv_buff.data_len = INTEL_SHORT( rcv_buff.data_len );
1271                 rcv_buff.send_time = INTEL_FLOAT( rcv_buff.send_time );
1272                 memcpy(d3_rcv_addr.addr, &tcp_addr->sin_addr.s_addr, 4);
1273                 d3_rcv_addr.port = tcp_addr->sin_port;
1274                 d3_rcv_addr.type = NET_TCP;
1275                 link_type = NET_TCP;
1276
1277                 if(bytesin==-1){
1278                         ml_printf("recvfrom returned an error! -- %d\n",WSAGetLastError());
1279                         //Int3();//See Kevin
1280                         return;
1281                 }
1282                 if(bytesin){
1283                         //Someone wants to connect, so find a slot
1284                         if(rcv_buff.type == RNT_REQ_CONN){
1285                                 for(i=1; i<MAXRELIABLESOCKETS; i++){
1286                                         if( (Reliable_sockets[i].status == RNF_CONNECTED) || (Reliable_sockets[i].status == RNF_LIMBO) ){
1287                                                 //if(memcmp(&rcv_addr,&reliable_sockets[i].addr,sizeof(struct sockaddr))==0)
1288                                                 if(memcmp(&d3_rcv_addr, &Reliable_sockets[i].net_addr, sizeof(net_addr_t)) == 0){
1289                                                         //We already have a reliable link to this user, so we will ignore it...
1290                                                         ml_printf("Received duplicate connection request. %d\n",i);
1291                                                         //reliable_sockets[i].last_packet_received = timer_GetTime();
1292                                                         psnet_rel_send_ack(&Reliable_sockets[i].addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1293                                                         //We will change this as a hack to prevent later code from hooking us up
1294                                                         rcv_buff.type = 0xff;
1295                                                         continue;
1296                                                 }
1297                                         }
1298                                 }
1299                                 for(i=1; i<MAXRELIABLESOCKETS; i++){
1300                                         if(Reliable_sockets[i].status == RNF_UNUSED){
1301                                                 //Add the new connection here.
1302                                                 Reliable_sockets[i].connection_type=link_type;
1303                                                 memcpy(&Reliable_sockets[i].net_addr, &d3_rcv_addr, sizeof(net_addr_t));
1304                                                 memcpy(&Reliable_sockets[i].addr ,&rcv_addr, sizeof(struct sockaddr));
1305                                                 Reliable_sockets[i].ping_pos = 0;
1306                                                 Reliable_sockets[i].num_ping_samples = 0;
1307                                                 Reliable_sockets[i].status = RNF_LIMBO;
1308                                                 Reliable_sockets[i].last_packet_received = psnet_get_time();
1309                                                 rsocket = &Reliable_sockets[i];
1310                                                 rcvaddr = (struct sockaddr_in *)&rcv_addr;
1311                                                 ml_printf("Connect from %s:%d\n", inet_ntoa(rcvaddr->sin_addr), htons(rcvaddr->sin_port));
1312                                                 break;
1313                                         }
1314                                 }
1315                                 if(i==MAXRELIABLESOCKETS){
1316                                         //No more connections!
1317                                         ml_printf("Out of incoming reliable connection sockets\n");
1318                                         //Int3();//See Kevin
1319                                         continue;
1320                                 }
1321                                 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1322                         }
1323
1324                         //Find out if this is a packet from someone we were expecting a packet.
1325                         rcvaddr = (struct sockaddr_in *)&rcv_addr;
1326                         for(i=1; i<MAXRELIABLESOCKETS; i++){
1327                                 if(memcmp(&d3_rcv_addr,&Reliable_sockets[i].net_addr,sizeof(net_addr_t)) == 0){
1328                                         rsocket=&Reliable_sockets[i];
1329                                         break;
1330                                 }
1331                         }
1332                         if(rsocket == NULL){
1333                                 ml_printf("Received reliable data from unconnected client.\n");
1334                                 ml_printf("Received from %s:%d\n",inet_ntoa(rcvaddr->sin_addr),rcvaddr->sin_port);
1335                                 continue ;
1336                         }
1337                         rsocket->last_packet_received = psnet_get_time();
1338
1339                         if(rsocket->status != RNF_CONNECTED){
1340                                 //Get out of limbo
1341                                 if(rsocket->status == RNF_LIMBO){
1342                                         //this is our connection to the server
1343                                         if(Serverconn != 0xffffffff){
1344                                                 if(rcv_buff.type == RNT_ACK){
1345                                                         ushort *acknum = (ushort *)&rcv_buff.data;
1346                                                         if(*acknum == (~CONNECTSEQ & 0xffff)){
1347                                                                 rsocket->status = RNF_CONNECTED;
1348                                                                 ml_printf("Got ACK for IAMHERE!\n");
1349                                                         }
1350                                                         continue;
1351                                                 }
1352                                         } else if(rcv_buff.type == RNT_I_AM_HERE){
1353                                                 rsocket->status = RNF_CONNECTING;
1354                                                 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1355                                                 ml_printf("Got IAMHERE!\n");
1356                                                 continue;
1357                                         }
1358                                 }
1359                                 if((rcv_buff.type == RNT_DATA) && (Serverconn != 0xffffffff)){
1360                                         rsocket->status = RNF_CONNECTED;
1361                                 } else {
1362                                         rsocket->last_packet_received = psnet_get_time();
1363                                         continue;
1364                                 }
1365                         }
1366                         //Update the last recv variable so we don't need a heartbeat
1367                         rsocket->last_packet_received = psnet_get_time();
1368
1369                         if(rcv_buff.type == RNT_HEARTBEAT){
1370                                 continue;
1371                         }
1372                         if(rcv_buff.type == RNT_ACK){
1373                                 //Update ping time
1374                                 rsocket->num_ping_samples++;
1375
1376                                 rsocket->pings[rsocket->ping_pos] = rsocket->last_packet_received - rcv_buff.send_time;
1377                                 if(rsocket->num_ping_samples >= MAX_PING_HISTORY){
1378                                         float sort_ping[MAX_PING_HISTORY];
1379                                         for(int a=0;a<MAX_PING_HISTORY;a++){
1380                                                 sort_ping[a] = rsocket->pings[a];
1381                                         }
1382
1383                                         qsort(sort_ping ,MAX_PING_HISTORY, sizeof(float), psnet_rel_ping_compare);
1384                                         rsocket->mean_ping = ((sort_ping[MAX_PING_HISTORY/2]+sort_ping[(MAX_PING_HISTORY/2)+1]))/2;
1385                                 }
1386                                 rsocket->ping_pos++;
1387                                 if(rsocket->ping_pos >= MAX_PING_HISTORY){
1388                                         rsocket->ping_pos=0;
1389                                 }
1390
1391                                 // if this is an ack for a send buffer on the socket, kill the send buffer. its done
1392                                 for(i=0; i<MAXNETBUFFERS; i++){
1393                                         unsigned int *acksig = (unsigned int *)&rcv_buff.data;
1394                                         if(rsocket){
1395                                                 if(rsocket->sbuffers[i]){
1396                                                         if(rsocket->ssequence[i] == INTEL_INT(*acksig) ){
1397                                                                 SDL_assert(rsocket->sbuffers[i] != NULL);
1398                                                                 free(rsocket->sbuffers[i]);
1399                                                                 rsocket->sbuffers[i] = NULL;
1400                                                                 rsocket->ssequence[i] = 0;
1401                                                         }
1402                                                 }
1403                                         }
1404                                 }
1405                                 //remove that packet from the send buffer
1406                                 rsocket->last_packet_received = psnet_get_time();
1407                                 continue;
1408                         }
1409
1410                         if(rcv_buff.type == RNT_DATA_COMP){
1411                                 //More2Come
1412                                 //Decompress it. Put it back in the buffer. Process it as RNT_DATA
1413                                 rcv_buff.type = RNT_DATA;
1414                         }
1415                         if(rcv_buff.type == RNT_DATA){
1416                                 //If the data is out of order by >= MAXNETBUFFERS-1 ignore that packet for now
1417                                 int seqdelta;
1418                                 seqdelta = rcv_buff.seq - rsocket->oursequence;
1419                                 if(seqdelta<0) seqdelta = seqdelta*-1;
1420                                 if(seqdelta>=MAXNETBUFFERS - 1){
1421                                         ml_printf("Received reliable packet out of order!\n");
1422                                         //It's out of order, so we won't ack it, which will mean we will get it again soon.
1423                                         continue;
1424                                 }
1425                                 //else move data into the proper buffer position
1426                                 int savepacket=1;
1427
1428                                 if(rsocket->oursequence < (0xffff - (MAXNETBUFFERS-1))){
1429                                         if (rsocket->oursequence > rcv_buff.seq){
1430                                                 savepacket = 0;
1431                                         }
1432                                 } else {
1433                                         //Sequence is high, so prepare for wrap around
1434                                         if( ((unsigned short)(rcv_buff.seq + rsocket->oursequence)) > (MAXNETBUFFERS-1)){
1435                                                 savepacket = 0;
1436                                         }
1437                                 }
1438
1439                                 for(i=0; i<MAXNETBUFFERS; i++){
1440                                         if( (NULL != rsocket->rbuffers[i]) && (rsocket->rsequence[i] == rcv_buff.seq)){
1441                                                 //Received duplicate packet!
1442                                                 savepacket = 0;
1443                                         }
1444                                 }
1445                                 if(savepacket){
1446                                         for(i=0; i<MAXNETBUFFERS; i++){
1447                                                 if(NULL == rsocket->rbuffers[i]){
1448                                                         if(rcv_buff.data_len>max_len){
1449                                                                 rsocket->recv_len[i] = rcv_buff.data_len;
1450                                                         } else {
1451                                                                 rsocket->recv_len[i] = rcv_buff.data_len;
1452                                                         }
1453                                                         rsocket->rbuffers[i] = (reliable_net_rcvbuffer *)malloc(sizeof(reliable_net_rcvbuffer));
1454                                                         memcpy(rsocket->rbuffers[i]->buffer,rcv_buff.data,rsocket->recv_len[i]);
1455                                                         rsocket->rsequence[i] = rcv_buff.seq;
1456                                                         break;
1457                                                 }
1458                                         }
1459                                 }
1460                                 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1461                         }
1462
1463                 }
1464         } while (udp_has_data > 0);
1465
1466         // Go through each reliable socket that is connected and do any needed work.
1467         for(j=0; j<MAXRELIABLESOCKETS; j++){
1468                 rsocket=&Reliable_sockets[j];
1469
1470                 if(Serverconn == 0xffffffff){
1471                         if(rsocket->status==RNF_LIMBO){
1472                                 if(fl_abs((psnet_get_time() - rsocket->last_packet_received))>Nettimeout){
1473                                         ml_printf("Reliable (but in limbo) socket (%d) timed out in nw_WorkReliable().\n",j);
1474                                         memset(rsocket,0,sizeof(reliable_socket));
1475                                         rsocket->status = RNF_UNUSED;//Won't work if this is an outgoing connection.
1476                                 }
1477                         }
1478                 } else {
1479                         if((rsocket->status == RNF_LIMBO) && (fl_abs((psnet_get_time() - First_sent_iamhere)) > Nettimeout)){
1480                                 rsocket->status = RNF_BROKEN;
1481                                 ml_printf("Reliable socket (%d) timed out in nw_WorkReliable().\n",j);
1482                         }
1483                 }
1484
1485                 if(rsocket->status == RNF_CONNECTED){
1486                         float retry_packet_time;
1487                         if((rsocket->mean_ping==0) || (rsocket->mean_ping > (NETRETRYTIME*4))){
1488                                 retry_packet_time = NETRETRYTIME;
1489                         } else {
1490                                 if(rsocket->mean_ping<MIN_NET_RETRYTIME) {
1491                                         retry_packet_time = (float)MIN_NET_RETRYTIME;
1492                                 } else {
1493                                         retry_packet_time = ((float)(float)rsocket->mean_ping * (float)1.25);
1494                                 }
1495                         }
1496                         //Iterate through send buffers.
1497                         for(i=0;i<MAXNETBUFFERS;i++){
1498                                 // send again
1499                                 if((rsocket->sbuffers[i]) && (fl_abs((psnet_get_time() - rsocket->timesent[i])) >= retry_packet_time)) {
1500                                         reliable_header send_header;
1501                                         send_header.send_time = psnet_get_time();
1502                                         send_header.send_time = INTEL_FLOAT( send_header.send_time );
1503                                         send_header.seq = INTEL_SHORT( rsocket->ssequence[i] );
1504                                         memcpy(send_header.data,rsocket->sbuffers[i]->buffer,rsocket->send_len[i]);
1505                                         send_header.data_len = INTEL_SHORT( (ushort)rsocket->send_len[i] );
1506                                         send_header.type = RNT_DATA;
1507                                         if(rsocket->connection_type == NET_TCP){
1508                                                 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);
1509                                         }
1510                                         int error = WSAGetLastError();
1511                                         if((rcode == SOCKET_ERROR) && NETCALL_WOULDBLOCK(error)){
1512                                                 //The packet didn't get sent, flag it to try again next frame
1513                                                 rsocket->timesent[i] = psnet_get_time()-(NETRETRYTIME*4);
1514                                         } else {
1515                                                 rsocket->last_packet_sent = psnet_get_time();
1516                                                 rsocket->timesent[i] = psnet_get_time();
1517                                         }
1518
1519                                 }//getcwd
1520                         }
1521
1522                         if((rsocket->status == RNF_CONNECTED) && (fl_abs((psnet_get_time() - rsocket->last_packet_sent)) > NETHEARTBEATTIME)) {
1523                                 reliable_header send_header;
1524                                 send_header.send_time = psnet_get_time();
1525                                 send_header.send_time = INTEL_FLOAT( send_header.send_time );
1526                                 send_header.seq = 0;
1527                                 send_header.data_len = 0;
1528                                 send_header.type = RNT_HEARTBEAT;
1529
1530                                 rcode = -1;
1531                                 if(rsocket->connection_type == NET_TCP){
1532                                         rcode = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1533                                 }
1534                                 int error = WSAGetLastError();
1535                                 if((rcode != SOCKET_ERROR) && NETCALL_WOULDBLOCK(error)){
1536                                         //It must have been sent
1537                                         rsocket->last_packet_sent = psnet_get_time();
1538                                 }
1539                         }
1540
1541                         if((rsocket->status == RNF_CONNECTED) && (fl_abs((psnet_get_time() - rsocket->last_packet_received))>Nettimeout)){
1542                                 //This socket is hosed.....inform someone?
1543                                 ml_printf("Reliable Socket (%d) timed out in nw_WorkReliable().\n",j);
1544                                 rsocket->status = RNF_BROKEN;
1545                         }
1546                 }
1547         }
1548 }
1549
1550 // get the status of a reliable socket, see RNF_* defines above
1551 int psnet_rel_get_status(PSNET_SOCKET_RELIABLE socketid)
1552 {
1553         if(socketid >= MAXRELIABLESOCKETS){
1554                 return -1;
1555         }
1556
1557         return Reliable_sockets[socketid].status;
1558 }
1559
1560 // function which checks the Listen_socket for possibly incoming requests to be connected.
1561 // returns 0 on error or nothing waiting.  1 if we should try to accept
1562 int psnet_rel_check_for_listen(net_addr_t *from_addr)
1563 {
1564         struct sockaddr_in *ip_addr;                            // UDP/TCP socket structure
1565
1566         psnet_rel_work();
1567         int i;
1568         for(i=1; i<MAXRELIABLESOCKETS; i++){
1569                 if(Reliable_sockets[i].status == RNF_CONNECTING){
1570                         Reliable_sockets[i].status = RNF_CONNECTED;
1571                         //memcpy(from_addr,&reliable_sockets[i].addr,sizeof(struct sockaddr));
1572                         ml_printf("New reliable connection in nw_CheckListenSocket().\n");
1573
1574                         if (Reliable_sockets[i].connection_type != NET_TCP) {
1575                                 continue;
1576                         }
1577
1578                         ip_addr = (struct sockaddr_in *)&Reliable_sockets[i].addr;
1579                         memset(from_addr, 0x00, sizeof(net_addr_t));
1580                         from_addr->port = ntohs( ip_addr->sin_port );
1581                         from_addr->type = NET_TCP;
1582                         memcpy(from_addr->addr, &ip_addr->sin_addr.s_addr, 4);
1583
1584                         /*
1585                         char dbg_output[50];
1586                         nw_GetNumbersFromHostAddress(from_addr,dbg_output);
1587                         mprintf((0,"Got address from: %s\n",dbg_output));
1588                         */
1589                         return i;
1590                 }
1591         }
1592         return INVALID_SOCKET;
1593 }
1594
1595 // attacmpt to connect() to the server's tcp socket.  socket parameter is simply assigned to the
1596 // Reliable_socket socket created in psnet_init
1597 void psnet_rel_connect_to_server(PSNET_SOCKET *socket, net_addr_t *server_addr)
1598 {
1599         //Send out a RNT_REQ_CONN packet, and wait for it to be acked.
1600         struct sockaddr_in sockaddr;                            // UDP/TCP socket structure
1601         struct sockaddr *addr = NULL;                                           // pointer to struct sockaddr to make coding easier
1602         struct sockaddr rcv_addr;
1603         int addrlen;
1604         ubyte iaddr[4];
1605         ushort port;
1606 //      float time_sent_req = 0;
1607         float first_sent_req = 0;
1608         static reliable_header conn_header;
1609         static reliable_header ack_header;
1610         int bytesin;
1611         struct timeval timeout;
1612         fd_set read_fds;
1613         int i;
1614         *socket = INVALID_SOCKET;
1615
1616         memcpy(iaddr, &server_addr->addr, 4);
1617         port = (ushort)(server_addr->port);     // Talk to the server listen port
1618
1619         conn_header.type = RNT_REQ_CONN;
1620         conn_header.seq = CONNECTSEQ;
1621         conn_header.data_len = 0;
1622
1623         timeout.tv_sec=0;
1624         timeout.tv_usec=0;
1625
1626         if (server_addr->type != NET_TCP) {
1627                 return;
1628         }
1629
1630         SDL_assert(Tcp_active);
1631
1632         //Flush out any left overs
1633         FD_ZERO(&read_fds);
1634         FD_SET(Unreliable_socket, &read_fds);
1635         while(SELECT(Unreliable_socket+1, &read_fds, NULL, NULL, &timeout, PSNET_TYPE_RELIABLE)){
1636                 addrlen = sizeof(struct sockaddr);
1637                 bytesin = RECVFROM(Unreliable_socket, (char *)&ack_header,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1638                 if(bytesin==-1){
1639                         //Int3();//See Kevin
1640                         ml_printf("UDP recvfrom returned an error! -- %d\n",WSAGetLastError());
1641                         break;
1642                         //return;
1643                 }
1644                 FD_ZERO(&read_fds);
1645                 FD_SET(Unreliable_socket, &read_fds);
1646         }
1647
1648         memset(&ack_header,0,sizeof(reliable_header));
1649         SOCKET typeless_sock = 0;
1650         net_addr_t d3_rcv_addr;
1651         memset(&d3_rcv_addr,0,sizeof(net_addr_t));
1652
1653
1654         sockaddr.sin_family = AF_INET;
1655         memcpy(&sockaddr.sin_addr.s_addr, iaddr, 4);
1656         sockaddr.sin_port = htons(port);
1657         addr = (struct sockaddr *)&sockaddr;
1658         if( SOCKET_ERROR == SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE) ){
1659                 ml_printf("Unable to send UDP packet in nw_ConnectToServer()! -- %d\n",WSAGetLastError());
1660                 return;
1661         }
1662         memcpy(d3_rcv_addr.addr, &sockaddr.sin_addr.s_addr, 4);
1663         d3_rcv_addr.port = sockaddr.sin_port;
1664         d3_rcv_addr.type = NET_TCP;
1665         typeless_sock = Unreliable_socket;
1666
1667
1668         first_sent_req = psnet_get_time();
1669 //      time_sent_req = psnet_get_time();
1670
1671         //Wait until we get a response from the server or we timeout
1672
1673         do {
1674                 PSNET_TOP_LAYER_PROCESS();
1675
1676                 FD_ZERO(&read_fds);
1677                 FD_SET(typeless_sock, &read_fds);
1678                 if(SELECT(typeless_sock+1, &read_fds, NULL,NULL,&timeout, PSNET_TYPE_RELIABLE)){
1679                         ml_string("selected() in psnet_rel_connect_to_server()");
1680
1681                         addrlen = sizeof(struct sockaddr);
1682                         bytesin = RECVFROM(typeless_sock,(char *)&ack_header,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1683                         if(bytesin==-1){
1684                                 ml_printf("recvfrom returned an error! -- %d\n",WSAGetLastError());
1685                                 Int3();//See Kevin
1686                                 return;
1687                         }
1688
1689                         ml_string("received data after select in psnet_rel_connect_to_server()");
1690                         if(bytesin){
1691                                 ml_string("about to check ack_header.type");
1692                                 if(ack_header.type == RNT_ACK){
1693                                         short *acknum = (short *)&ack_header.data;
1694                                         if(*acknum == CONNECTSEQ){
1695                                                 for(i=1; i<MAXRELIABLESOCKETS; i++){
1696                                                         if(Reliable_sockets[i].status==RNF_UNUSED){
1697                                                                 //Add the new connection here.
1698                                                                 memset(&Reliable_sockets[i],0,sizeof(reliable_socket));
1699                                                                 Reliable_sockets[i].connection_type = (ubyte)server_addr->type;
1700                                                                 memcpy(&Reliable_sockets[i].net_addr,&d3_rcv_addr,sizeof(net_addr_t));
1701                                                                 Reliable_sockets[i].last_packet_received = psnet_get_time();
1702                                                                 memcpy(&Reliable_sockets[i].addr,&rcv_addr,sizeof(struct sockaddr));
1703                                                                 Reliable_sockets[i].status = RNF_LIMBO;
1704                                                                 *socket = i;
1705                                                                 ml_printf("Succesfully connected to server in nw_ConnectToServer().\n");
1706                                                                 //Now send I_AM_HERE packet
1707                                                                 conn_header.type = RNT_I_AM_HERE;
1708                                                                 conn_header.seq = (ushort)(~CONNECTSEQ);
1709                                                                 conn_header.data_len = 0;
1710                                                                 Serverconn = i;
1711                                                                 First_sent_iamhere = psnet_get_time();
1712                                                                 Last_sent_iamhere = psnet_get_time();
1713                                                                 int rcode = SENDTO(typeless_sock,(char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1714                                                                 if(rcode == SOCKET_ERROR){
1715                                                                         *socket = INVALID_SOCKET;
1716                                                                         Reliable_sockets[i].status = RNF_UNUSED;
1717                                                                         memset(&Reliable_sockets[i],0,sizeof(reliable_socket));
1718                                                                         ml_printf("Unable to send packet in nw_ConnectToServer()\n");
1719                                                                         return;
1720                                                                 }
1721                                                                 Reliable_sockets[i].last_packet_sent = psnet_get_time();
1722                                                                 float f;
1723                                                                 f = psnet_get_time();
1724                                                                 while((fl_abs((psnet_get_time() - f))<2) && (Reliable_sockets[i].status != RNF_CONNECTING)){
1725                                                                         psnet_rel_work();
1726                                                                 }
1727
1728                                                                 return;
1729                                                         }
1730                                                 }
1731                                                 ml_printf("Out of reliable socket space in nw_ConnectToServer().\n");
1732                                                 return;
1733                                         } else ml_printf("Received out of sequence ACK in nw_ConnectToServer().\n");
1734                                 } else ml_printf("Received something that isn't an ACK in nw_ConnectToServer().\n");
1735                         } else ml_printf("Received 0 bytes from recvfrom() in nw_ConnectToServer().\n");
1736                 }
1737                 /*
1738                 if((psnet_get_time()-time_sent_req)>2)
1739                 {
1740                         ml_printf("Resending connect request.\n");
1741                         int ret = SENDTO(typeless_sock,(char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1742                         if(ret != SOCKET_ERROR){
1743                                 time_sent_req = psnet_get_time();
1744                         } else {
1745                                 ml_printf("Error sending connection request! -- %d\n",WSAGetLastError() );
1746                         }
1747                 }
1748                 */
1749
1750         } while(fl_abs((psnet_get_time() - first_sent_req)) < RELIABLE_CONNECT_TIME);
1751 }
1752
1753 // returns the ip address of this computer
1754 /*
1755 int psnet_rel_get_ip()
1756 {
1757         char local[255];
1758         LPHOSTENT hostent;
1759         struct sockaddr_in local_address;
1760         int ret;
1761
1762         // Get the local host name
1763         memset(&local_address, 0, sizeof(local_address));
1764         ret = gethostname(local, 255 );
1765         if (ret != SOCKET_ERROR ){
1766                 // Resolve host name for local address
1767                 hostent = gethostbyname((char *)local);
1768                 if ( hostent ){
1769                         local_address.sin_addr.s_addr = *((u_long FAR *)(hostent->h_addr));
1770                 }
1771         } else {
1772                 ml_string("SOCKET_ERROR in psnet_rel_get_ip()!");
1773         }
1774         ml_printf(%s:%d\n", inet_ntoa(rcvaddr->sin_addr), htons(rcvaddr->sin_port)
1775         return local_address.sin_addr.s_addr;
1776 }
1777 */
1778
1779 // returns the ip address of this computer
1780 int psnet_get_ip()
1781 {
1782         struct sockaddr_in local_address;
1783
1784         if(Psnet_connection == NETWORK_CONNECTION_DIALUP){
1785                 local_address.sin_addr.s_addr = psnet_ras_status();
1786                 if(local_address.sin_addr.s_addr == INADDR_NONE){
1787                         local_address.sin_addr.s_addr = INADDR_ANY;
1788                 }
1789         } else {
1790                 // Init local address to zero
1791                 local_address.sin_addr.s_addr = INADDR_ANY;
1792         }
1793
1794         // NOTE: for memeory checkers, do NOT try to free this
1795         ml_printf("psnet_get_ip() reports IP : %s\n", inet_ntoa(local_address.sin_addr));
1796
1797         return local_address.sin_addr.s_addr;
1798 }
1799
1800 // initialize reliable sockets
1801 int psnet_init_rel_tcp(int port, int should_listen)
1802 {
1803         /*
1804         struct sockaddr_in sockaddr;
1805
1806         sockaddr.sin_port = htons((ushort)port);
1807         sockaddr.sin_family = AF_INET;
1808         unsigned int my_ip;
1809         ml_printf("Setting up reliable sockets.\n");
1810
1811         my_ip = psnet_get_ip();
1812
1813         memcpy(&sockaddr.sin_addr.s_addr, &my_ip, sizeof(uint));
1814
1815         Reliable_UDP_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP );
1816         if(INVALID_SOCKET == Reliable_UDP_socket){
1817                 ml_printf("Unable to create reliable UDP socket -- %d\n", WSAGetLastError() );
1818
1819                 return 0;
1820         } else if(bind(Reliable_UDP_socket,(struct sockaddr *)&sockaddr,sizeof(struct sockaddr))!=0){
1821                 ml_printf("Unable to bind reliable socket -- %d\n", WSAGetLastError() );
1822
1823                 return 0;
1824         }
1825
1826         // make any reliable sockets which we create that aren't listening non-blocking sockets
1827         int error;
1828         unsigned long arg;
1829
1830         arg = TRUE;
1831         error = ioctlsocket( Reliable_UDP_socket, FIONBIO, &arg );
1832         if ( error == SOCKET_ERROR ) {
1833                 ml_printf("Unable to make reliable UDP socket non-blocking -- %d\n", WSAGetLastError() );
1834
1835                 return 0;
1836         }
1837         */
1838
1839         // success
1840         return 1;
1841 }
1842
1843 void psnet_rel_close()
1844 {
1845         int idx;
1846         PSNET_SOCKET_RELIABLE sock;
1847
1848         // kill all sockets
1849         for(idx=0; idx<MAXRELIABLESOCKETS; idx++){
1850                 if(Reliable_sockets[idx].status != RNF_UNUSED){
1851                         sock = idx;
1852                         psnet_rel_close_socket(&sock);
1853                 }
1854         }
1855 }
1856
1857 // ------------------------------------------------------------------------------------------------------
1858 // PACKET BUFFERING FUNCTIONS
1859 //
1860
1861 // initialize the buffering system
1862 void psnet_buffer_init(network_packet_buffer_list *l)
1863 {
1864         int idx;
1865
1866         // blast the buffer clean
1867         memset(l->psnet_buffers, 0, sizeof(network_packet_buffer) * MAX_PACKET_BUFFERS);
1868
1869         // set all buffer sequence #'s to -1
1870         for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
1871                 l->psnet_buffers[idx].sequence_number = -1;
1872         }
1873
1874         // initialize the sequence #
1875         l->psnet_seq_number = 0;
1876         l->psnet_lowest_id = -1;
1877         l->psnet_highest_id = -1;
1878 }
1879
1880 // buffer a packet (maintain order!)
1881 void psnet_buffer_packet(network_packet_buffer_list *l, ubyte *data, int length, net_addr_t *from)
1882 {
1883         int idx;
1884         int found_buf = 0;
1885
1886         // find the first empty packet
1887         for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
1888                 if(l->psnet_buffers[idx].sequence_number == -1){
1889                         found_buf = 1;
1890                         break;
1891                 }
1892         }
1893
1894         // if we didn't find the buffer, report an overrun
1895         if(!found_buf){
1896                 ml_printf("WARNING - Buffer overrun in psnet\n");
1897         } else {
1898                 // copy in the data
1899                 memcpy(l->psnet_buffers[idx].data, data, length);
1900                 l->psnet_buffers[idx].len = length;
1901                 memcpy(&l->psnet_buffers[idx].from_addr, from, sizeof(net_addr_t));
1902                 l->psnet_buffers[idx].sequence_number = l->psnet_seq_number;
1903
1904                 // keep track of the highest id#
1905                 l->psnet_highest_id = l->psnet_seq_number++;
1906
1907                 // set the lowest id# for the first time
1908                 if(l->psnet_lowest_id == -1){
1909                         l->psnet_lowest_id = l->psnet_highest_id;
1910                 }
1911         }
1912 }
1913
1914 // get the index of the next packet in order!
1915 int psnet_buffer_get_next(network_packet_buffer_list *l, ubyte *data, int *length, net_addr_t *from)
1916 {
1917         int idx;
1918
1919         // if there are no buffers, do nothing
1920         if((l->psnet_lowest_id == -1) || (l->psnet_lowest_id > l->psnet_highest_id)){
1921                 return 0;
1922         }
1923
1924         // search until we find the lowest packet index id#
1925         for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
1926                 // if we found the buffer
1927                 if(l->psnet_buffers[idx].sequence_number == l->psnet_lowest_id){
1928                         break;
1929                 }
1930         }
1931
1932         // at this point, we should _always_ have found the buffer
1933         if (idx == MAX_PACKET_BUFFERS) {
1934                 Int3();
1935                 return 0;
1936         }
1937
1938         // copy out the buffer data
1939         memcpy(data, l->psnet_buffers[idx].data, l->psnet_buffers[idx].len);
1940         *length = l->psnet_buffers[idx].len;
1941         memcpy(from, &l->psnet_buffers[idx].from_addr, sizeof(net_addr_t));
1942
1943         // now we need to cleanup the packet list
1944
1945         // mark the buffer as free
1946         l->psnet_buffers[idx].sequence_number = -1;
1947         l->psnet_lowest_id++;
1948
1949         return 1;
1950 }
1951
1952 // -------------------------------------------------------------------------------------------------------
1953 // PSNET 2 FORWARD DEFINITIONS
1954 //
1955
1956 // if the string is a legally formatted ip string
1957 int psnet_is_valid_numeric_ip(char *ip)
1958 {
1959         char *token;
1960         char copy[100];
1961         int val1,val2,val3,val4;
1962
1963         // get the first ip value
1964         SDL_strlcpy(copy, ip, SDL_arraysize(copy));
1965         token = strtok(copy,".");
1966         if(token == NULL){
1967                 return 0;
1968         } else {
1969                 // get the value of the token
1970                 val1 = atoi(token);
1971                 if((val1 < 0) || (val1 > 255)){
1972                         return 0;
1973                 }
1974         }
1975
1976         // second ip value
1977         token = strtok(NULL,".");
1978         if(token == NULL){
1979                 return 0;
1980         } else {
1981                 // get the value of the token
1982                 val2 = atoi(token);
1983                 if((val2 < 0) || (val2 > 255)){
1984                         return 0;
1985                 }
1986         }
1987
1988         // third ip value
1989         token = strtok(NULL,".");
1990         if(token == NULL){
1991                 return 0;
1992         } else {
1993                 // get the value of the token
1994                 val3 = atoi(token);
1995                 if((val3 < 0) || (val3 > 255)){
1996                         return 0;
1997                 }
1998         }
1999
2000         // third ip value
2001         token = strtok(NULL,"");
2002         if(token == NULL){
2003                 return 0;
2004         } else {
2005                 // get the value of the token
2006                 val4 = atoi(token);
2007                 if((val4 < 0) || (val4 > 255)){
2008                         return 0;
2009                 }
2010         }
2011
2012         // make sure he hasn't entered all 0's
2013         if((val1 == 0) && (val2 == 0) && (val3 == 0) && (val4 == 0)){
2014                 return 0;
2015         }
2016
2017         // valid
2018         return 1;
2019 }
2020
2021 // function called from high level FreeSpace code to determine the status of the networking
2022 // code returns one of a handful of macros
2023 #ifndef PLAT_UNIX
2024 DWORD (__stdcall *pRasEnumConnections)(LPRASCONN lprasconn, LPDWORD lpcb, LPDWORD lpcConnections) = NULL;
2025 DWORD (__stdcall *pRasGetConnectStatus)(HRASCONN hrasconn, LPRASCONNSTATUS lprasconnstatus ) = NULL;
2026 DWORD (__stdcall *pRasGetProjectionInfo)(HRASCONN hrasconn, RASPROJECTION rasprojection, LPVOID lpprojection, LPDWORD lpcb ) = NULL;
2027
2028 // functions to get the status of a RAS connection
2029 unsigned int psnet_ras_status()
2030 {
2031         int rval;
2032         unsigned long size, num_connections, i;
2033         RASCONN rasbuffer[25];
2034         HINSTANCE ras_handle;
2035         unsigned long rasip=0;
2036         RASPPPIP projection;
2037         // int Ras_connected;
2038
2039         Ras_connected = 0;
2040
2041         // first, call a LoadLibrary to load the RAS api
2042         ras_handle = LoadLibrary( (LPCWSTR)"rasapi32.dll" );
2043         if ( ras_handle == NULL ) {
2044                 return INADDR_ANY;
2045         }
2046
2047         pRasEnumConnections = (DWORD (__stdcall *)(LPRASCONN, LPDWORD, LPDWORD))GetProcAddress(ras_handle, "RasEnumConnectionsA");
2048         if (!pRasEnumConnections)       {
2049                 FreeLibrary( ras_handle );
2050                 return INADDR_ANY;
2051         }
2052         pRasGetConnectStatus = (DWORD (__stdcall *)(HRASCONN, LPRASCONNSTATUS))GetProcAddress(ras_handle, "RasGetConnectStatusA");
2053         if (!pRasGetConnectStatus)      {
2054                 FreeLibrary( ras_handle );
2055                 return INADDR_ANY;
2056         }
2057         pRasGetProjectionInfo = (DWORD (__stdcall *)(HRASCONN, RASPROJECTION, LPVOID, LPDWORD))GetProcAddress(ras_handle, "RasGetProjectionInfoA");
2058         if (!pRasGetProjectionInfo)     {
2059                 FreeLibrary( ras_handle );
2060                 return INADDR_ANY;
2061         }
2062
2063         size = sizeof(rasbuffer);
2064         rasbuffer[0].dwSize = sizeof(RASCONN);
2065
2066         rval = pRasEnumConnections( rasbuffer, &size, &num_connections );
2067         if ( rval ) {
2068                 FreeLibrary( ras_handle );
2069                 return INADDR_ANY;
2070         }
2071
2072         // JAS: My computer gets to this point, but I have no RAS connections,
2073         // so just exit
2074         if ( num_connections < 1 )      {
2075                 ml_string("Found no RAS connections");
2076                 FreeLibrary( ras_handle );
2077                 return INADDR_ANY;
2078         }
2079
2080         ml_printf("Found %d connections", num_connections);
2081
2082         for (i = 0; i < num_connections; i++ ) {
2083                 RASCONNSTATUS status;
2084
2085                 ml_printf("Connection %d:", i);
2086                 ml_printf("Entry Name: %s", rasbuffer[i].szEntryName);
2087                 ml_printf("Device Type: %s", rasbuffer[i].szDeviceType);
2088                 ml_printf("Device Name: %s", rasbuffer[i].szDeviceName);
2089
2090                 // get the connection status
2091                 status.dwSize = sizeof(RASCONNSTATUS);
2092                 rval = pRasGetConnectStatus(rasbuffer[i].hrasconn, &status);
2093                 if ( rval != 0 ) {
2094                         FreeLibrary( ras_handle );
2095                         return INADDR_ANY;
2096                 }
2097
2098                 // get the projection informatiom
2099                 size = sizeof(projection);
2100                 projection.dwSize = size;
2101                 rval = pRasGetProjectionInfo(rasbuffer[i].hrasconn, RASP_PppIp, &projection, &size );
2102                 if ( rval != 0 ) {
2103                         FreeLibrary( ras_handle );
2104                         return INADDR_ANY;
2105                 }
2106
2107                 ml_printf("IP Address: %s", projection.szIpAddress);
2108         }
2109
2110         Ras_connected = 1;
2111
2112         FreeLibrary( ras_handle );
2113         rasip = inet_addr((const char *)projection.szIpAddress);
2114         if(rasip==INADDR_NONE){
2115                 return INADDR_ANY;
2116         }
2117
2118         //The ip of the RAS connection
2119         return rasip;
2120 }
2121 #else
2122 unsigned int psnet_ras_status()
2123 {
2124         STUB_FUNCTION;
2125
2126         return INADDR_ANY;
2127 }
2128 #endif
2129
2130 // functions to get the status of a RAS connection
2131 /*
2132 void psnet_ras_status()
2133 {
2134         int rval;
2135         unsigned long size, num_connections, i;
2136         RASCONN rasbuffer[25];
2137         HINSTANCE ras_handle;
2138
2139         Ras_connected = 0;
2140
2141         // first, call a LoadLibrary to load the RAS api
2142         ras_handle = LoadLibrary( NOX("rasapi32.dll") );
2143         if ( ras_handle == NULL ) {
2144                 return;
2145         }
2146
2147         pRasEnumConnections = (DWORD (__stdcall *)(LPRASCONN, LPDWORD, LPDWORD))GetProcAddress(ras_handle, NOX("RasEnumConnectionsA"));
2148         if (!pRasEnumConnections)       {
2149                 FreeLibrary( ras_handle );
2150                 return;
2151         }
2152         pRasGetConnectStatus = (DWORD (__stdcall *)(HRASCONN, LPRASCONNSTATUS))GetProcAddress(ras_handle, NOX("RasGetConnectStatusA"));
2153         if (!pRasGetConnectStatus)      {
2154                 FreeLibrary( ras_handle );
2155                 return;
2156         }
2157         pRasGetProjectionInfo = (DWORD (__stdcall *)(HRASCONN, RASPROJECTION, LPVOID, LPDWORD))GetProcAddress(ras_handle, NOX("RasGetProjectionInfoA"));
2158         if (!pRasGetProjectionInfo)     {
2159                 FreeLibrary( ras_handle );
2160                 return;
2161         }
2162
2163         size = sizeof(rasbuffer);
2164         rasbuffer[0].dwSize = sizeof(RASCONN);
2165
2166         rval = pRasEnumConnections( rasbuffer, &size, &num_connections );
2167         if ( rval ) {
2168                 FreeLibrary( ras_handle );
2169                 return;
2170         }
2171
2172         // JAS: My computer gets to this point, but I have no RAS connections,
2173         // so just exit
2174         if ( num_connections < 1 )      {
2175                 ml_printf("Found no connections\n" );
2176                 FreeLibrary( ras_handle );
2177                 return;
2178         }
2179
2180         ml_printf("Found %d connections\n", num_connections);
2181
2182         for (i = 0; i < num_connections; i++ ) {
2183                 RASCONNSTATUS status;
2184                 RASPPPIP projection;
2185                 unsigned long size;
2186
2187                 ml_printf("Connection %d:\n", i);
2188                 ml_printf("Entry Name: %s\n", rasbuffer[i].szEntryName);
2189                 ml_printf("Device Type: %s\n", rasbuffer[i].szDeviceType);
2190                 ml_printf("Device Name: %s\n", rasbuffer[i].szDeviceName);
2191
2192                 // get the connection status
2193                 status.dwSize = sizeof(RASCONNSTATUS);
2194                 rval = pRasGetConnectStatus(rasbuffer[i].hrasconn, &status);
2195                 if ( rval != 0 ) {
2196                         FreeLibrary( ras_handle );
2197                         return;
2198                 }
2199
2200                 ml_printf("\tStatus: %s\n", (status.rasconnstate==RASCS_Connected)?"Connected":"Not Connected");
2201
2202                 // get the projection informatiom
2203                 size = sizeof(projection);
2204                 projection.dwSize = size;
2205                 rval = pRasGetProjectionInfo(rasbuffer[i].hrasconn, RASP_PppIp, &projection, &size );
2206                 if ( rval != 0 ) {
2207                         FreeLibrary( ras_handle );
2208                         return;
2209                 }
2210
2211                 ml_printf("IP Address: %s", projection.szIpAddress));
2212         }
2213
2214         Ras_connected = 1;
2215
2216         FreeLibrary( ras_handle );
2217 }
2218 */
2219
2220 // set some options on a socket
2221 void psnet_socket_options( SOCKET sock )
2222 {
2223         int broadcast;//, ret;
2224         SOCKLEN_T cursize, cursizesize, bufsize;
2225
2226         // Set the mode of the socket to allow broadcasting
2227         broadcast = 1;
2228         if(setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&broadcast, sizeof(broadcast) )){
2229                 Can_broadcast = 0;
2230         } else {
2231                 Can_broadcast = 1;
2232         }
2233
2234         // reuseaddr
2235         // setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&broadcast, sizeof(broadcast) );
2236
2237         // try and increase the size of my receive buffer
2238         bufsize = MAX_RECEIVE_BUFSIZE;
2239
2240         // set the current size of the receive buffer
2241         cursizesize = sizeof(int);
2242         getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&cursize, &cursizesize);
2243         // for ( trysize = bufsize; trysize >= cursize; trysize >>= 1 ) {
2244         /*ret =*/ setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&bufsize, sizeof(bufsize));
2245         /*if ( ret == SOCKET_ERROR ) {
2246                 int wserr;
2247
2248                 wserr = WSAGetLastError();
2249                 // if ( (wserr == WSAENOPROTOOPT) || (wserr == WSAEINVAL) )
2250                         // break;
2251         }*/
2252         // }
2253         getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&cursize, &cursizesize);
2254         ml_printf("Receive buffer set to %d\n", cursize);
2255
2256         // set the current size of the send buffer
2257         cursizesize = sizeof(int);
2258         getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&cursize, &cursizesize);
2259         // for ( trysize = bufsize; trysize >= cursize; trysize >>= 1 ) {
2260         /*ret =*/ setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&bufsize, sizeof(bufsize));
2261         /*if ( ret == SOCKET_ERROR ) {
2262                 int wserr;
2263
2264                 wserr = WSAGetLastError();
2265                 // if ( (wserr == WSAENOPROTOOPT) || (wserr == WSAEINVAL) ){
2266                         // break;
2267                 // }
2268         }*/
2269         getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&cursize, &cursizesize);
2270         ml_printf("Send buffer set to %d\n", cursize);
2271 }
2272
2273 // initialize tcp socket
2274 int psnet_init_tcp()
2275 {
2276         struct sockaddr_in sockaddr;
2277
2278         TCP_socket = INVALID_SOCKET;
2279
2280         TCP_socket = socket( AF_INET, SOCK_DGRAM, 0 );
2281         if ( TCP_socket == (int)INVALID_SOCKET ) {
2282                 Tcp_failure_code = WSAGetLastError();
2283                 ml_printf("Error on TCP startup %d\n", Tcp_failure_code);
2284                 return 0;
2285         }
2286
2287         // bind the socket
2288         memset(&sockaddr,0,sizeof(struct sockaddr_in));
2289         sockaddr.sin_family = AF_INET;
2290         sockaddr.sin_addr.s_addr = psnet_get_ip();
2291         sockaddr.sin_port = htons( Psnet_default_port );
2292         if ( bind(TCP_socket, (struct sockaddr*)&sockaddr, sizeof (sockaddr)) == SOCKET_ERROR) {
2293                 Tcp_failure_code = WSAGetLastError();
2294                 ml_printf("Couldn't bind TCP socket (%d)! Invalidating TCP\n", Tcp_failure_code );
2295                 return 0;
2296         }
2297
2298         // set socket options
2299         psnet_socket_options( TCP_socket );
2300         Tcp_can_broadcast = Can_broadcast;
2301
2302         // success
2303         return 1;
2304 }
2305
2306 // get time in seconds
2307 float psnet_get_time()
2308 {
2309         return (float)timer_get_milliseconds() / 1000.0f;
2310 }
2311
2312 // mark a socket as having received data
2313 void psnet_mark_received(PSNET_SOCKET_RELIABLE socket)
2314 {
2315         // valid socket?
2316         if((socket == 0xffffffff) || (socket >= MAXRELIABLESOCKETS)){
2317                 return;
2318         }
2319
2320         // mark it
2321         Reliable_sockets[socket].last_packet_received = psnet_get_time();
2322 }
2323
2324 #endif  //  if PSNET2
2325