src/network/psnet2.cpp

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