net_dgrm.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // net_dgrm.c
  21
  22 // This is enables a simple IP banning mechanism
  23 #define BAN_TEST
  24
  25 #ifdef BAN_TEST
  26 #if defined(_WIN32)
  27 #include <windows.h>
  28 #elif defined (NeXT)
  29 #include <sys/socket.h>
  30 #include <arpa/inet.h>
  31 #else
  32 #define AF_INET                 2       /* internet */
  33 struct in_addr
  34 {
  35         union
  36         {
  37                 struct { unsigned char s_b1,s_b2,s_b3,s_b4; } S_un_b;
  38                 struct { unsigned short s_w1,s_w2; } S_un_w;
  39                 unsigned long S_addr;
  40         } S_un;
  41 };
  42 #define s_addr  S_un.S_addr     /* can be used for most tcp & ip code */
  43 struct sockaddr_in
  44 {
  45     short                       sin_family;
  46     unsigned short      sin_port;
  47         struct in_addr  sin_addr;
  48     char                        sin_zero[8];
  49 };
  50 char *inet_ntoa(struct in_addr in);
  51 unsigned long inet_addr(const char *cp);
  52 #endif
  53 #endif  // BAN_TEST
  54
  55 #include "quakedef.h"
  56 #include "net_dgrm.h"
  57
  58 cvar_t cl_port = {CVAR_SAVE, "cl_port", "0"};
  59
  60 // these two macros are to make the code more readable
  61 #define sfunc   net_landrivers[sock->landriver]
  62 #define dfunc   net_landrivers[net_landriverlevel]
  63
  64 static int net_landriverlevel;
  65
  66 /* statistic counters */
  67 int     packetsSent = 0;
  68 int     packetsReSent = 0;
  69 int packetsReceived = 0;
  70 int receivedDuplicateCount = 0;
  71 int shortPacketCount = 0;
  72 int droppedDatagrams;
  73
  74 static int myDriverLevel;
  75
  76 struct
  77 {
  78         unsigned int    length;
  79         unsigned int    sequence;
  80         qbyte                   data[MAX_DATAGRAM];
  81 } packetBuffer;
  82
  83
  84 //#ifdef DEBUG
  85 char *StrAddr (struct qsockaddr *addr)
  86 {
  87         static char buf[34];
  88         qbyte *p = (qbyte *)addr;
  89         int n;
  90
  91         for (n = 0; n < 16; n++)
  92                 sprintf (buf + n * 2, "%02x", *p++);
  93         return buf;
  94 }
  95 //#endif
  96
  97
  98 #ifdef BAN_TEST
  99 unsigned long banAddr = 0x00000000;
 100 unsigned long banMask = 0xffffffff;
 101
 102 void NET_Ban_f (void)
 103 {
 104         char    addrStr [32];
 105         char    maskStr [32];
 106         void    (*print) (const char *fmt, ...);
 107
 108         if (cmd_source == src_command)
 109         {
 110                 if (!sv.active)
 111                 {
 112                         Cmd_ForwardToServer ();
 113                         return;
 114                 }
 115                 print = Con_Printf;
 116         }
 117         else
 118         {
 119                 if (pr_global_struct->deathmatch)
 120                         return;
 121                 print = SV_ClientPrintf;
 122         }
 123
 124         switch (Cmd_Argc ())
 125         {
 126                 case 1:
 127                         if (((struct in_addr *)&banAddr)->s_addr)
 128                         {
 129                                 strcpy(addrStr, inet_ntoa(*(struct in_addr *)&banAddr));
 130                                 strcpy(maskStr, inet_ntoa(*(struct in_addr *)&banMask));
 131                                 print("Banning %s [%s]\n", addrStr, maskStr);
 132                         }
 133                         else
 134                                 print("Banning not active\n");
 135                         break;
 136
 137                 case 2:
 138                         if (Q_strcasecmp(Cmd_Argv(1), "off") == 0)
 139                                 banAddr = 0x00000000;
 140                         else
 141                                 banAddr = inet_addr(Cmd_Argv(1));
 142                         banMask = 0xffffffff;
 143                         break;
 144
 145                 case 3:
 146                         banAddr = inet_addr(Cmd_Argv(1));
 147                         banMask = inet_addr(Cmd_Argv(2));
 148                         break;
 149
 150                 default:
 151                         print("BAN ip_address [mask]\n");
 152                         break;
 153         }
 154 }
 155 #endif
 156
 157
 158 int Datagram_SendMessage (qsocket_t *sock, sizebuf_t *data)
 159 {
 160         unsigned int    packetLen;
 161         unsigned int    dataLen;
 162         unsigned int    eom;
 163
 164 #ifdef DEBUG
 165         if (data->cursize == 0)
 166                 Sys_Error("Datagram_SendMessage: zero length message\n");
 167
 168         if (data->cursize > NET_MAXMESSAGE)
 169                 Sys_Error("Datagram_SendMessage: message too big %u\n", data->cursize);
 170
 171         if (sock->canSend == false)
 172                 Sys_Error("SendMessage: called with canSend == false\n");
 173 #endif
 174
 175         memcpy(sock->sendMessage, data->data, data->cursize);
 176         sock->sendMessageLength = data->cursize;
 177
 178         if (data->cursize <= MAX_DATAGRAM)
 179         {
 180                 dataLen = data->cursize;
 181                 eom = NETFLAG_EOM;
 182         }
 183         else
 184         {
 185                 dataLen = MAX_DATAGRAM;
 186                 eom = 0;
 187         }
 188         packetLen = NET_HEADERSIZE + dataLen;
 189
 190         packetBuffer.length = BigLong(packetLen | (NETFLAG_DATA | eom));
 191         packetBuffer.sequence = BigLong(sock->sendSequence++);
 192         memcpy (packetBuffer.data, sock->sendMessage, dataLen);
 193
 194         sock->canSend = false;
 195
 196         if (sfunc.Write (sock->socket, (qbyte *)&packetBuffer, packetLen, &sock->addr) == -1)
 197                 return -1;
 198
 199         sock->lastSendTime = net_time;
 200         packetsSent++;
 201         return 1;
 202 }
 203
 204
 205 int SendMessageNext (qsocket_t *sock)
 206 {
 207         unsigned int    packetLen;
 208         unsigned int    dataLen;
 209         unsigned int    eom;
 210
 211         if (sock->sendMessageLength <= MAX_DATAGRAM)
 212         {
 213                 dataLen = sock->sendMessageLength;
 214                 eom = NETFLAG_EOM;
 215         }
 216         else
 217         {
 218                 dataLen = MAX_DATAGRAM;
 219                 eom = 0;
 220         }
 221         packetLen = NET_HEADERSIZE + dataLen;
 222
 223         packetBuffer.length = BigLong(packetLen | (NETFLAG_DATA | eom));
 224         packetBuffer.sequence = BigLong(sock->sendSequence++);
 225         memcpy (packetBuffer.data, sock->sendMessage, dataLen);
 226
 227         sock->sendNext = false;
 228
 229         if (sfunc.Write (sock->socket, (qbyte *)&packetBuffer, packetLen, &sock->addr) == -1)
 230                 return -1;
 231
 232         sock->lastSendTime = net_time;
 233         packetsSent++;
 234         return 1;
 235 }
 236
 237
 238 int ReSendMessage (qsocket_t *sock)
 239 {
 240         unsigned int    packetLen;
 241         unsigned int    dataLen;
 242         unsigned int    eom;
 243
 244         if (sock->sendMessageLength <= MAX_DATAGRAM)
 245         {
 246                 dataLen = sock->sendMessageLength;
 247                 eom = NETFLAG_EOM;
 248         }
 249         else
 250         {
 251                 dataLen = MAX_DATAGRAM;
 252                 eom = 0;
 253         }
 254         packetLen = NET_HEADERSIZE + dataLen;
 255
 256         packetBuffer.length = BigLong(packetLen | (NETFLAG_DATA | eom));
 257         packetBuffer.sequence = BigLong(sock->sendSequence - 1);
 258         memcpy (packetBuffer.data, sock->sendMessage, dataLen);
 259
 260         sock->sendNext = false;
 261
 262         if (sfunc.Write (sock->socket, (qbyte *)&packetBuffer, packetLen, &sock->addr) == -1)
 263                 return -1;
 264
 265         sock->lastSendTime = net_time;
 266         packetsReSent++;
 267         return 1;
 268 }
 269
 270
 271 qboolean Datagram_CanSendMessage (qsocket_t *sock)
 272 {
 273         if (sock->sendNext)
 274                 SendMessageNext (sock);
 275
 276         return sock->canSend;
 277 }
 278
 279
 280 qboolean Datagram_CanSendUnreliableMessage (qsocket_t *sock)
 281 {
 282         return true;
 283 }
 284
 285
 286 int Datagram_SendUnreliableMessage (qsocket_t *sock, sizebuf_t *data)
 287 {
 288         int     packetLen;
 289
 290 #ifdef DEBUG
 291         if (data->cursize == 0)
 292                 Sys_Error("Datagram_SendUnreliableMessage: zero length message\n");
 293
 294         if (data->cursize > MAX_DATAGRAM)
 295                 Sys_Error("Datagram_SendUnreliableMessage: message too big %u\n", data->cursize);
 296 #endif
 297
 298         packetLen = NET_HEADERSIZE + data->cursize;
 299
 300         packetBuffer.length = BigLong(packetLen | NETFLAG_UNRELIABLE);
 301         packetBuffer.sequence = BigLong(sock->unreliableSendSequence++);
 302         memcpy (packetBuffer.data, data->data, data->cursize);
 303
 304         if (sfunc.Write (sock->socket, (qbyte *)&packetBuffer, packetLen, &sock->addr) == -1)
 305                 return -1;
 306
 307         packetsSent++;
 308         return 1;
 309 }
 310
 311
 312 int     Datagram_GetMessage (qsocket_t *sock)
 313 {
 314         unsigned int    length;
 315         unsigned int    flags;
 316         int                             ret = 0;
 317         struct qsockaddr readaddr;
 318         unsigned int    sequence;
 319         unsigned int    count;
 320
 321         if (!sock->canSend)
 322                 if ((net_time - sock->lastSendTime) > 1.0)
 323                         ReSendMessage (sock);
 324
 325         while(1)
 326         {
 327                 length = sfunc.Read (sock->socket, (qbyte *)&packetBuffer, NET_DATAGRAMSIZE, &readaddr);
 328
 329                 if (length == 0)
 330                         break;
 331
 332                 if (length == -1)
 333                 {
 334                         Con_Printf("Read error\n");
 335                         return -1;
 336                 }
 337
 338                 if (sfunc.AddrCompare(&readaddr, &sock->addr) != 0)
 339                 {
 340 #ifdef DEBUG
 341                         Con_DPrintf("Forged packet received\n");
 342                         Con_DPrintf("Expected: %s\n", StrAddr (&sock->addr));
 343                         Con_DPrintf("Received: %s\n", StrAddr (&readaddr));
 344 #endif
 345                         continue;
 346                 }
 347
 348                 if (length < NET_HEADERSIZE)
 349                 {
 350                         shortPacketCount++;
 351                         continue;
 352                 }
 353
 354                 length = BigLong(packetBuffer.length);
 355                 flags = length & (~NETFLAG_LENGTH_MASK);
 356                 length &= NETFLAG_LENGTH_MASK;
 357
 358                 if (flags & NETFLAG_CTL)
 359                         continue;
 360
 361                 sequence = BigLong(packetBuffer.sequence);
 362                 packetsReceived++;
 363
 364                 if (flags & NETFLAG_UNRELIABLE)
 365                 {
 366                         if (sequence < sock->unreliableReceiveSequence)
 367                         {
 368                                 Con_DPrintf("Got a stale datagram\n");
 369                                 ret = 0;
 370                                 break;
 371                         }
 372                         if (sequence != sock->unreliableReceiveSequence)
 373                         {
 374                                 count = sequence - sock->unreliableReceiveSequence;
 375                                 droppedDatagrams += count;
 376                                 Con_DPrintf("Dropped %u datagram(s)\n", count);
 377                         }
 378                         sock->unreliableReceiveSequence = sequence + 1;
 379
 380                         length -= NET_HEADERSIZE;
 381
 382                         SZ_Clear (&net_message);
 383                         SZ_Write (&net_message, packetBuffer.data, length);
 384
 385                         ret = 2;
 386                         break;
 387                 }
 388
 389                 if (flags & NETFLAG_ACK)
 390                 {
 391                         if (sequence != (sock->sendSequence - 1))
 392                         {
 393                                 Con_DPrintf("Stale ACK received\n");
 394                                 continue;
 395                         }
 396                         if (sequence == sock->ackSequence)
 397                         {
 398                                 sock->ackSequence++;
 399                                 if (sock->ackSequence != sock->sendSequence)
 400                                         Con_DPrintf("ack sequencing error\n");
 401                         }
 402                         else
 403                         {
 404                                 Con_DPrintf("Duplicate ACK received\n");
 405                                 continue;
 406                         }
 407                         sock->sendMessageLength -= MAX_DATAGRAM;
 408                         if (sock->sendMessageLength > 0)
 409                         {
 410                                 memcpy(sock->sendMessage, sock->sendMessage+MAX_DATAGRAM, sock->sendMessageLength);
 411                                 sock->sendNext = true;
 412                         }
 413                         else
 414                         {
 415                                 sock->sendMessageLength = 0;
 416                                 sock->canSend = true;
 417                         }
 418                         continue;
 419                 }
 420
 421                 if (flags & NETFLAG_DATA)
 422                 {
 423                         packetBuffer.length = BigLong(NET_HEADERSIZE | NETFLAG_ACK);
 424                         packetBuffer.sequence = BigLong(sequence);
 425                         sfunc.Write (sock->socket, (qbyte *)&packetBuffer, NET_HEADERSIZE, &readaddr);
 426
 427                         if (sequence != sock->receiveSequence)
 428                         {
 429                                 receivedDuplicateCount++;
 430                                 continue;
 431                         }
 432                         sock->receiveSequence++;
 433
 434                         length -= NET_HEADERSIZE;
 435
 436                         if (flags & NETFLAG_EOM)
 437                         {
 438                                 SZ_Clear(&net_message);
 439                                 SZ_Write(&net_message, sock->receiveMessage, sock->receiveMessageLength);
 440                                 SZ_Write(&net_message, packetBuffer.data, length);
 441                                 sock->receiveMessageLength = 0;
 442
 443                                 ret = 1;
 444                                 break;
 445                         }
 446
 447                         memcpy(sock->receiveMessage + sock->receiveMessageLength, packetBuffer.data, length);
 448                         sock->receiveMessageLength += length;
 449                         continue;
 450                 }
 451         }
 452
 453         if (sock->sendNext)
 454                 SendMessageNext (sock);
 455
 456         return ret;
 457 }
 458
 459
 460 void PrintStats(qsocket_t *s)
 461 {
 462         Con_Printf("canSend = %4u   \n", s->canSend);
 463         Con_Printf("sendSeq = %4u   ", s->sendSequence);
 464         Con_Printf("recvSeq = %4u   \n", s->receiveSequence);
 465         Con_Printf("\n");
 466 }
 467
 468 void NET_Stats_f (void)
 469 {
 470         qsocket_t       *s;
 471
 472         if (Cmd_Argc () == 1)
 473         {
 474                 Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
 475                 Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
 476                 Con_Printf("reliable messages sent     = %i\n", messagesSent);
 477                 Con_Printf("reliable messages received = %i\n", messagesReceived);
 478                 Con_Printf("packetsSent                = %i\n", packetsSent);
 479                 Con_Printf("packetsReSent              = %i\n", packetsReSent);
 480                 Con_Printf("packetsReceived            = %i\n", packetsReceived);
 481                 Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
 482                 Con_Printf("shortPacketCount           = %i\n", shortPacketCount);
 483                 Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
 484         }
 485         else if (strcmp(Cmd_Argv(1), "*") == 0)
 486         {
 487                 for (s = net_activeSockets; s; s = s->next)
 488                         PrintStats(s);
 489         }
 490         else
 491         {
 492                 for (s = net_activeSockets; s; s = s->next)
 493                         if (Q_strcasecmp(Cmd_Argv(1), s->address) == 0)
 494                                 break;
 495                 if (s == NULL)
 496                         return;
 497                 PrintStats(s);
 498         }
 499 }
 500
 501
 502 static qboolean testInProgress = false;
 503 static int              testPollCount;
 504 static int              testDriver;
 505 static int              testSocket;
 506
 507 static void Test_Poll(void);
 508 PollProcedure   testPollProcedure = {NULL, 0.0, Test_Poll};
 509
 510 static void Test_Poll(void)
 511 {
 512         struct qsockaddr clientaddr;
 513         int             control;
 514         int             len;
 515         char    name[32];
 516         char    address[64];
 517         int             colors;
 518         int             frags;
 519         int             connectTime;
 520         qbyte   playerNumber;
 521         int             c;
 522
 523         net_landriverlevel = testDriver;
 524
 525         while (1)
 526         {
 527                 len = dfunc.Read (testSocket, net_message.data, net_message.maxsize, &clientaddr);
 528                 if (len < sizeof(int))
 529                         break;
 530
 531                 net_message.cursize = len;
 532
 533                 MSG_BeginReading ();
 534                 control = BigLong(*((int *)net_message.data));
 535                 MSG_ReadLong();
 536                 if (control == -1)
 537                         break;
 538                 if ((control & (~NETFLAG_LENGTH_MASK)) !=  NETFLAG_CTL)
 539                         break;
 540                 if ((control & NETFLAG_LENGTH_MASK) != len)
 541                         break;
 542
 543                 c = MSG_ReadByte();
 544                 if (c != CCREP_PLAYER_INFO)
 545                         Sys_Error("Unexpected repsonse to Player Info request\n");
 546
 547                 playerNumber = MSG_ReadByte();
 548                 strcpy(name, MSG_ReadString());
 549                 colors = MSG_ReadLong();
 550                 frags = MSG_ReadLong();
 551                 connectTime = MSG_ReadLong();
 552                 strcpy(address, MSG_ReadString());
 553
 554                 Con_Printf("%s\n  frags:%3i  colors:%u %u  time:%u\n  %s\n", name, frags, colors >> 4, colors & 0x0f, connectTime / 60, address);
 555         }
 556
 557         testPollCount--;
 558         if (testPollCount)
 559         {
 560                 SchedulePollProcedure(&testPollProcedure, 0.1);
 561         }
 562         else
 563         {
 564                 dfunc.CloseSocket(testSocket);
 565                 testInProgress = false;
 566         }
 567 }
 568
 569 static void Test_f (void)
 570 {
 571         const char *host;
 572         int n, max = MAX_SCOREBOARD;
 573         struct qsockaddr sendaddr;
 574
 575         if (testInProgress)
 576                 return;
 577
 578         host = Cmd_Argv (1);
 579
 580         if (host && hostCacheCount)
 581         {
 582                 for (n = 0; n < hostCacheCount; n++)
 583                         if (Q_strcasecmp (host, hostcache[n].name) == 0)
 584                         {
 585                                 if (hostcache[n].driver != myDriverLevel)
 586                                         continue;
 587                                 net_landriverlevel = hostcache[n].ldriver;
 588                                 max = hostcache[n].maxusers;
 589                                 memcpy(&sendaddr, &hostcache[n].addr, sizeof(struct qsockaddr));
 590                                 break;
 591                         }
 592                 if (n < hostCacheCount)
 593                         goto JustDoIt;
 594         }
 595
 596         for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++)
 597         {
 598                 if (!net_landrivers[net_landriverlevel].initialized)
 599                         continue;
 600
 601                 // see if we can resolve the host name
 602                 if (dfunc.GetAddrFromName(host, &sendaddr) != -1)
 603                         break;
 604         }
 605         if (net_landriverlevel == net_numlandrivers)
 606                 return;
 607
 608 JustDoIt:
 609         testSocket = dfunc.OpenSocket(0);
 610         if (testSocket == -1)
 611                 return;
 612
 613         testInProgress = true;
 614         testPollCount = 20;
 615         testDriver = net_landriverlevel;
 616
 617         for (n = 0; n < max; n++)
 618         {
 619                 SZ_Clear(&net_message);
 620                 // save space for the header, filled in later
 621                 MSG_WriteLong(&net_message, 0);
 622                 MSG_WriteByte(&net_message, CCREQ_PLAYER_INFO);
 623                 MSG_WriteByte(&net_message, n);
 624                 *((int *)net_message.data) = BigLong(NETFLAG_CTL |      (net_message.cursize & NETFLAG_LENGTH_MASK));
 625                 dfunc.Write (testSocket, net_message.data, net_message.cursize, &sendaddr);
 626         }
 627         SZ_Clear(&net_message);
 628         SchedulePollProcedure(&testPollProcedure, 0.1);
 629 }
 630
 631
 632 static qboolean test2InProgress = false;
 633 static int              test2Driver;
 634 static int              test2Socket;
 635
 636 static void Test2_Poll(void);
 637 PollProcedure   test2PollProcedure = {NULL, 0.0, Test2_Poll};
 638
 639 static void Test2_Poll(void)
 640 {
 641         struct qsockaddr clientaddr;
 642         int             control;
 643         int             len;
 644         int             c;
 645         char    name[256];
 646         char    value[256];
 647
 648         net_landriverlevel = test2Driver;
 649         name[0] = 0;
 650
 651         len = dfunc.Read (test2Socket, net_message.data, net_message.maxsize, &clientaddr);
 652         if (len < sizeof(int))
 653                 goto Reschedule;
 654
 655         net_message.cursize = len;
 656
 657         MSG_BeginReading ();
 658         control = BigLong(*((int *)net_message.data));
 659         MSG_ReadLong();
 660         if (control == -1)
 661                 goto Error;
 662         if ((control & (~NETFLAG_LENGTH_MASK)) !=  NETFLAG_CTL)
 663                 goto Error;
 664         if ((control & NETFLAG_LENGTH_MASK) != len)
 665                 goto Error;
 666
 667         c = MSG_ReadByte();
 668         if (c != CCREP_RULE_INFO)
 669                 goto Error;
 670
 671         strcpy(name, MSG_ReadString());
 672         if (name[0] == 0)
 673                 goto Done;
 674         strcpy(value, MSG_ReadString());
 675
 676         Con_Printf("%-16.16s  %-16.16s\n", name, value);
 677
 678         SZ_Clear(&net_message);
 679         // save space for the header, filled in later
 680         MSG_WriteLong(&net_message, 0);
 681         MSG_WriteByte(&net_message, CCREQ_RULE_INFO);
 682         MSG_WriteString(&net_message, name);
 683         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 684         dfunc.Write (test2Socket, net_message.data, net_message.cursize, &clientaddr);
 685         SZ_Clear(&net_message);
 686
 687 Reschedule:
 688         SchedulePollProcedure(&test2PollProcedure, 0.05);
 689         return;
 690
 691 Error:
 692         Con_Printf("Unexpected repsonse to Rule Info request\n");
 693 Done:
 694         dfunc.CloseSocket(test2Socket);
 695         test2InProgress = false;
 696         return;
 697 }
 698
 699 static void Test2_f (void)
 700 {
 701         const char *host;
 702         int n;
 703         struct qsockaddr sendaddr;
 704
 705         if (test2InProgress)
 706                 return;
 707
 708         host = Cmd_Argv (1);
 709
 710         if (host && hostCacheCount)
 711         {
 712                 for (n = 0; n < hostCacheCount; n++)
 713                         if (Q_strcasecmp (host, hostcache[n].name) == 0)
 714                         {
 715                                 if (hostcache[n].driver != myDriverLevel)
 716                                         continue;
 717                                 net_landriverlevel = hostcache[n].ldriver;
 718                                 memcpy(&sendaddr, &hostcache[n].addr, sizeof(struct qsockaddr));
 719                                 break;
 720                         }
 721                 if (n < hostCacheCount)
 722                         goto JustDoIt;
 723         }
 724
 725         for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++)
 726         {
 727                 if (!net_landrivers[net_landriverlevel].initialized)
 728                         continue;
 729
 730                 // see if we can resolve the host name
 731                 if (dfunc.GetAddrFromName(host, &sendaddr) != -1)
 732                         break;
 733         }
 734         if (net_landriverlevel == net_numlandrivers)
 735                 return;
 736
 737 JustDoIt:
 738         test2Socket = dfunc.OpenSocket(0);
 739         if (test2Socket == -1)
 740                 return;
 741
 742         test2InProgress = true;
 743         test2Driver = net_landriverlevel;
 744
 745         SZ_Clear(&net_message);
 746         // save space for the header, filled in later
 747         MSG_WriteLong(&net_message, 0);
 748         MSG_WriteByte(&net_message, CCREQ_RULE_INFO);
 749         MSG_WriteString(&net_message, "");
 750         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 751         dfunc.Write (test2Socket, net_message.data, net_message.cursize, &sendaddr);
 752         SZ_Clear(&net_message);
 753         SchedulePollProcedure(&test2PollProcedure, 0.05);
 754 }
 755
 756
 757 int Datagram_Init (void)
 758 {
 759         int i;
 760         int csock;
 761
 762         myDriverLevel = net_driverlevel;
 763         Cmd_AddCommand ("net_stats", NET_Stats_f);
 764         Cvar_RegisterVariable (&cl_port);
 765
 766         if (COM_CheckParm("-nolan"))
 767                 return -1;
 768
 769         for (i = 0; i < net_numlandrivers; i++)
 770                 {
 771                 csock = net_landrivers[i].Init ();
 772                 if (csock == -1)
 773                         continue;
 774                 net_landrivers[i].initialized = true;
 775                 net_landrivers[i].controlSock = csock;
 776                 }
 777
 778 #ifdef BAN_TEST
 779         Cmd_AddCommand ("ban", NET_Ban_f);
 780 #endif
 781         Cmd_AddCommand ("test", Test_f);
 782         Cmd_AddCommand ("test2", Test2_f);
 783
 784         return 0;
 785 }
 786
 787
 788 void Datagram_Shutdown (void)
 789 {
 790         int i;
 791
 792 //
 793 // shutdown the lan drivers
 794 //
 795         for (i = 0; i < net_numlandrivers; i++)
 796         {
 797                 if (net_landrivers[i].initialized)
 798                 {
 799                         net_landrivers[i].Shutdown ();
 800                         net_landrivers[i].initialized = false;
 801                 }
 802         }
 803 }
 804
 805
 806 void Datagram_Close (qsocket_t *sock)
 807 {
 808         sfunc.CloseSocket(sock->socket);
 809 }
 810
 811
 812 void Datagram_Listen (qboolean state)
 813 {
 814         int i;
 815
 816         for (i = 0; i < net_numlandrivers; i++)
 817                 if (net_landrivers[i].initialized)
 818                         net_landrivers[i].Listen (state);
 819 }
 820
 821
 822 static qsocket_t *_Datagram_CheckNewConnections (void)
 823 {
 824         struct qsockaddr clientaddr;
 825         struct qsockaddr newaddr;
 826         int                     newsock;
 827         int                     acceptsock;
 828         qsocket_t       *sock;
 829         qsocket_t       *s;
 830         int                     len;
 831         int                     command;
 832         int                     control;
 833         int                     ret;
 834         int                     c;
 835
 836         acceptsock = dfunc.CheckNewConnections();
 837         if (acceptsock == -1)
 838                 return NULL;
 839
 840         SZ_Clear(&net_message);
 841
 842         len = dfunc.Read (acceptsock, net_message.data, net_message.maxsize, &clientaddr);
 843         if (len < sizeof(int))
 844                 return NULL;
 845         net_message.cursize = len;
 846
 847         MSG_BeginReading ();
 848         control = BigLong(*((int *)net_message.data));
 849         MSG_ReadLong();
 850         if (control == -1)
 851                 return NULL;
 852         if ((control & (~NETFLAG_LENGTH_MASK)) !=  NETFLAG_CTL)
 853                 return NULL;
 854         if ((control & NETFLAG_LENGTH_MASK) != len)
 855                 return NULL;
 856
 857         command = MSG_ReadByte();
 858         if (command == CCREQ_SERVER_INFO)
 859         {
 860                 if (strcmp(MSG_ReadString(), "QUAKE") != 0)
 861                         return NULL;
 862
 863                 SZ_Clear(&net_message);
 864                 // save space for the header, filled in later
 865                 MSG_WriteLong(&net_message, 0);
 866                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
 867                 dfunc.GetSocketAddr(acceptsock, &newaddr);
 868                 MSG_WriteString(&net_message, dfunc.AddrToString(&newaddr));
 869                 MSG_WriteString(&net_message, hostname.string);
 870                 MSG_WriteString(&net_message, sv.name);
 871                 MSG_WriteByte(&net_message, net_activeconnections);
 872                 MSG_WriteByte(&net_message, svs.maxclients);
 873                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
 874                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 875                 dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
 876                 SZ_Clear(&net_message);
 877                 return NULL;
 878         }
 879
 880         if (command == CCREQ_PLAYER_INFO)
 881         {
 882                 int                     playerNumber;
 883                 int                     activeNumber;
 884                 int                     clientNumber;
 885                 client_t        *client;
 886
 887                 playerNumber = MSG_ReadByte();
 888                 activeNumber = -1;
 889                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
 890                 {
 891                         if (client->active)
 892                         {
 893                                 activeNumber++;
 894                                 if (activeNumber == playerNumber)
 895                                         break;
 896                         }
 897                 }
 898                 if (clientNumber == svs.maxclients)
 899                         return NULL;
 900
 901                 SZ_Clear(&net_message);
 902                 // save space for the header, filled in later
 903                 MSG_WriteLong(&net_message, 0);
 904                 MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
 905                 MSG_WriteByte(&net_message, playerNumber);
 906                 MSG_WriteString(&net_message, client->name);
 907                 MSG_WriteLong(&net_message, client->colors);
 908                 MSG_WriteLong(&net_message, (int)client->edict->v.frags);
 909                 MSG_WriteLong(&net_message, (int)(net_time - client->netconnection->connecttime));
 910                 MSG_WriteString(&net_message, client->netconnection->address);
 911                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 912                 dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
 913                 SZ_Clear(&net_message);
 914
 915                 return NULL;
 916         }
 917
 918         if (command == CCREQ_RULE_INFO)
 919         {
 920                 char    *prevCvarName;
 921                 cvar_t  *var;
 922
 923                 // find the search start location
 924                 prevCvarName = MSG_ReadString();
 925                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
 926
 927                 // send the response
 928
 929                 SZ_Clear(&net_message);
 930                 // save space for the header, filled in later
 931                 MSG_WriteLong(&net_message, 0);
 932                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
 933                 if (var)
 934                 {
 935                         MSG_WriteString(&net_message, var->name);
 936                         MSG_WriteString(&net_message, var->string);
 937                 }
 938                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 939                 dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
 940                 SZ_Clear(&net_message);
 941
 942                 return NULL;
 943         }
 944
 945         if (command != CCREQ_CONNECT)
 946                 return NULL;
 947
 948         if (strcmp(MSG_ReadString(), "QUAKE") != 0)
 949                 return NULL;
 950
 951         c = MSG_ReadByte();
 952         if (c != NET_PROTOCOL_VERSION)
 953         {
 954                 SZ_Clear(&net_message);
 955                 // save space for the header, filled in later
 956                 MSG_WriteLong(&net_message, 0);
 957                 MSG_WriteByte(&net_message, CCREP_REJECT);
 958                 MSG_WriteString(&net_message, "Incompatible version.\n");
 959                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 960                 dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
 961                 SZ_Clear(&net_message);
 962                 return NULL;
 963         }
 964
 965 #ifdef BAN_TEST
 966         // check for a ban
 967         if (clientaddr.sa_family == AF_INET)
 968         {
 969                 unsigned long testAddr;
 970                 testAddr = ((struct sockaddr_in *)&clientaddr)->sin_addr.s_addr;
 971                 if ((testAddr & banMask) == banAddr)
 972                 {
 973                         SZ_Clear(&net_message);
 974                         // save space for the header, filled in later
 975                         MSG_WriteLong(&net_message, 0);
 976                         MSG_WriteByte(&net_message, CCREP_REJECT);
 977                         MSG_WriteString(&net_message, "You have been banned.\n");
 978                         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
 979                         dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
 980                         SZ_Clear(&net_message);
 981                         return NULL;
 982                 }
 983         }
 984 #endif
 985
 986         // see if this guy is already connected
 987         for (s = net_activeSockets; s; s = s->next)
 988         {
 989                 if (s->driver != net_driverlevel)
 990                         continue;
 991                 ret = dfunc.AddrCompare(&clientaddr, &s->addr);
 992                 if (ret >= 0)
 993                 {
 994                         // is this a duplicate connection reqeust?
 995                         if (ret == 0 && net_time - s->connecttime < 2.0)
 996                         {
 997                                 // yes, so send a duplicate reply
 998                                 SZ_Clear(&net_message);
 999                                 // save space for the header, filled in later
1000                                 MSG_WriteLong(&net_message, 0);
1001                                 MSG_WriteByte(&net_message, CCREP_ACCEPT);
1002                                 dfunc.GetSocketAddr(s->socket, &newaddr);
1003                                 MSG_WriteLong(&net_message, dfunc.GetSocketPort(&newaddr));
1004                                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1005                                 dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
1006                                 SZ_Clear(&net_message);
1007                                 return NULL;
1008                         }
1009                         // it's somebody coming back in from a crash/disconnect
1010                         // so close the old qsocket and let their retry get them back in
1011                         NET_Close(s);
1012                         return NULL;
1013                 }
1014         }
1015
1016         // allocate a QSocket
1017         sock = NET_NewQSocket ();
1018         if (sock == NULL)
1019         {
1020                 // no room; try to let him know
1021                 SZ_Clear(&net_message);
1022                 // save space for the header, filled in later
1023                 MSG_WriteLong(&net_message, 0);
1024                 MSG_WriteByte(&net_message, CCREP_REJECT);
1025                 MSG_WriteString(&net_message, "Server is full.\n");
1026                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1027                 dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
1028                 SZ_Clear(&net_message);
1029                 return NULL;
1030         }
1031
1032         // allocate a network socket
1033         newsock = dfunc.OpenSocket(0);
1034         if (newsock == -1)
1035         {
1036                 NET_FreeQSocket(sock);
1037                 return NULL;
1038         }
1039
1040         // connect to the client
1041         if (dfunc.Connect (newsock, &clientaddr) == -1)
1042         {
1043                 dfunc.CloseSocket(newsock);
1044                 NET_FreeQSocket(sock);
1045                 return NULL;
1046         }
1047
1048         // everything is allocated, just fill in the details
1049         sock->socket = newsock;
1050         sock->landriver = net_landriverlevel;
1051         sock->addr = clientaddr;
1052         strcpy(sock->address, dfunc.AddrToString(&clientaddr));
1053
1054         // send him back the info about the server connection he has been allocated
1055         SZ_Clear(&net_message);
1056         // save space for the header, filled in later
1057         MSG_WriteLong(&net_message, 0);
1058         MSG_WriteByte(&net_message, CCREP_ACCEPT);
1059         dfunc.GetSocketAddr(newsock, &newaddr);
1060         MSG_WriteLong(&net_message, dfunc.GetSocketPort(&newaddr));
1061         *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1062         dfunc.Write (acceptsock, net_message.data, net_message.cursize, &clientaddr);
1063         SZ_Clear(&net_message);
1064
1065         return sock;
1066 }
1067
1068 qsocket_t *Datagram_CheckNewConnections (void)
1069 {
1070         qsocket_t *ret = NULL;
1071
1072         for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++)
1073                 if (net_landrivers[net_landriverlevel].initialized)
1074                         if ((ret = _Datagram_CheckNewConnections ()) != NULL)
1075                                 break;
1076         return ret;
1077 }
1078
1079
1080 static void _Datagram_SearchForHosts (qboolean xmit)
1081 {
1082         int             ret;
1083         int             n;
1084         int             i;
1085         struct qsockaddr readaddr;
1086         struct qsockaddr myaddr;
1087         int             control;
1088         int             c;
1089
1090         dfunc.GetSocketAddr (dfunc.controlSock, &myaddr);
1091         if (xmit)
1092         {
1093                 SZ_Clear(&net_message);
1094                 // save space for the header, filled in later
1095                 MSG_WriteLong(&net_message, 0);
1096                 MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
1097                 MSG_WriteString(&net_message, "QUAKE");
1098                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1099                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1100                 dfunc.Broadcast(dfunc.controlSock, net_message.data, net_message.cursize);
1101                 SZ_Clear(&net_message);
1102         }
1103
1104         while ((ret = dfunc.Read (dfunc.controlSock, net_message.data, net_message.maxsize, &readaddr)) > 0)
1105         {
1106                 if (ret < sizeof(int))
1107                         continue;
1108                 net_message.cursize = ret;
1109
1110                 // don't answer our own query
1111                 if (dfunc.AddrCompare(&readaddr, &myaddr) >= 0)
1112                         continue;
1113
1114                 // is the cache full?
1115                 if (hostCacheCount == HOSTCACHESIZE)
1116                         continue;
1117
1118                 MSG_BeginReading ();
1119                 control = BigLong(*((int *)net_message.data));
1120                 MSG_ReadLong();
1121                 if (control == -1)
1122                         continue;
1123                 if ((control & (~NETFLAG_LENGTH_MASK)) !=  NETFLAG_CTL)
1124                         continue;
1125                 if ((control & NETFLAG_LENGTH_MASK) != ret)
1126                         continue;
1127
1128                 c = MSG_ReadByte();
1129                 if (c != CCREP_SERVER_INFO)
1130                         continue;
1131
1132                 dfunc.GetAddrFromName(MSG_ReadString(), &readaddr);
1133                 // search the cache for this server
1134                 for (n = 0; n < hostCacheCount; n++)
1135                         if (dfunc.AddrCompare(&readaddr, &hostcache[n].addr) == 0)
1136                                 break;
1137
1138                 // is it already there?
1139                 if (n < hostCacheCount)
1140                         continue;
1141
1142                 // add it
1143                 hostCacheCount++;
1144                 strcpy(hostcache[n].name, MSG_ReadString());
1145                 strcpy(hostcache[n].map, MSG_ReadString());
1146                 hostcache[n].users = MSG_ReadByte();
1147                 hostcache[n].maxusers = MSG_ReadByte();
1148                 c = MSG_ReadByte();
1149                 if (c != NET_PROTOCOL_VERSION)
1150                 {
1151                         strcpy(hostcache[n].cname, hostcache[n].name);
1152                         hostcache[n].cname[14] = 0;
1153                         strcpy(hostcache[n].name, "*");
1154                         strcat(hostcache[n].name, hostcache[n].cname);
1155                 }
1156                 memcpy(&hostcache[n].addr, &readaddr, sizeof(struct qsockaddr));
1157                 hostcache[n].driver = net_driverlevel;
1158                 hostcache[n].ldriver = net_landriverlevel;
1159                 strcpy(hostcache[n].cname, dfunc.AddrToString(&readaddr));
1160
1161                 // check for a name conflict
1162                 for (i = 0; i < hostCacheCount; i++)
1163                 {
1164                         if (i == n)
1165                                 continue;
1166                         if (Q_strcasecmp (hostcache[n].name, hostcache[i].name) == 0)
1167                         {
1168                                 i = strlen(hostcache[n].name);
1169                                 if (i < 15 && hostcache[n].name[i-1] > '8')
1170                                 {
1171                                         hostcache[n].name[i] = '0';
1172                                         hostcache[n].name[i+1] = 0;
1173                                 }
1174                                 else
1175                                         hostcache[n].name[i-1]++;
1176                                 i = -1;
1177                         }
1178                 }
1179         }
1180 }
1181
1182 void Datagram_SearchForHosts (qboolean xmit)
1183 {
1184         for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++)
1185         {
1186                 if (hostCacheCount == HOSTCACHESIZE)
1187                         break;
1188                 if (net_landrivers[net_landriverlevel].initialized)
1189                         _Datagram_SearchForHosts (xmit);
1190         }
1191 }
1192
1193
1194 static qsocket_t *_Datagram_Connect (char *host)
1195 {
1196         struct qsockaddr sendaddr;
1197         struct qsockaddr readaddr;
1198         qsocket_t       *sock;
1199         int                     newsock;
1200         int                     ret;
1201         int                     reps;
1202         double          start_time;
1203         int                     control;
1204         char            *reason;
1205
1206         // see if we can resolve the host name
1207         if (dfunc.GetAddrFromName(host, &sendaddr) == -1)
1208                 return NULL;
1209
1210         newsock = dfunc.OpenSocket (cl_port.integer);
1211         if (newsock == -1)
1212                 return NULL;
1213
1214         sock = NET_NewQSocket ();
1215         if (sock == NULL)
1216                 goto ErrorReturn2;
1217         sock->socket = newsock;
1218         sock->landriver = net_landriverlevel;
1219
1220         // connect to the host
1221         if (dfunc.Connect (newsock, &sendaddr) == -1)
1222                 goto ErrorReturn;
1223
1224         // send the connection request
1225         Con_Printf("trying...\n");CL_UpdateScreen();CL_UpdateScreen();
1226         start_time = net_time;
1227
1228         for (reps = 0; reps < 3; reps++)
1229         {
1230                 SZ_Clear(&net_message);
1231                 // save space for the header, filled in later
1232                 MSG_WriteLong(&net_message, 0);
1233                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
1234                 MSG_WriteString(&net_message, "QUAKE");
1235                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
1236                 *((int *)net_message.data) = BigLong(NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
1237                 dfunc.Write (newsock, net_message.data, net_message.cursize, &sendaddr);
1238                 SZ_Clear(&net_message);
1239                 do
1240                 {
1241                         ret = dfunc.Read (newsock, net_message.data, net_message.maxsize, &readaddr);
1242                         // if we got something, validate it
1243                         if (ret > 0)
1244                         {
1245                                 // is it from the right place?
1246                                 if (sfunc.AddrCompare(&readaddr, &sendaddr) != 0)
1247                                 {
1248                                         Con_DPrintf("wrong reply address\n");
1249                                         Con_DPrintf("Expected: %s\n", StrAddr (&sendaddr));
1250                                         Con_DPrintf("Received: %s\n", StrAddr (&readaddr));
1251                                         CL_UpdateScreen ();
1252                                         ret = 0;
1253                                         continue;
1254                                 }
1255
1256                                 if (ret < sizeof(int))
1257                                 {
1258                                         ret = 0;
1259                                         continue;
1260                                 }
1261
1262                                 net_message.cursize = ret;
1263                                 MSG_BeginReading ();
1264
1265                                 control = BigLong(*((int *)net_message.data));
1266                                 MSG_ReadLong();
1267                                 if (control == -1)
1268                                 {
1269                                         ret = 0;
1270                                         continue;
1271                                 }
1272                                 if ((control & (~NETFLAG_LENGTH_MASK)) !=  NETFLAG_CTL)
1273                                 {
1274                                         ret = 0;
1275                                         continue;
1276                                 }
1277                                 if ((control & NETFLAG_LENGTH_MASK) != ret)
1278                                 {
1279                                         ret = 0;
1280                                         continue;
1281                                 }
1282                         }
1283                 }
1284                 while (ret == 0 && (SetNetTime() - start_time) < 2.5);
1285                 if (ret)
1286                         break;
1287                 Con_Printf("still trying...\n");CL_UpdateScreen();CL_UpdateScreen();
1288                 start_time = SetNetTime();
1289         }
1290
1291         if (ret == 0)
1292         {
1293                 reason = "No Response";
1294                 Con_Printf("%s\n", reason);
1295                 strcpy(m_return_reason, reason);
1296                 goto ErrorReturn;
1297         }
1298
1299         if (ret == -1)
1300         {
1301                 reason = "Network Error";
1302                 Con_Printf("%s\n", reason);
1303                 strcpy(m_return_reason, reason);
1304                 goto ErrorReturn;
1305         }
1306
1307         ret = MSG_ReadByte();
1308         if (ret == CCREP_REJECT)
1309         {
1310                 reason = MSG_ReadString();
1311                 Con_Printf("%s", reason);
1312                 strncpy(m_return_reason, reason, 31);
1313                 goto ErrorReturn;
1314         }
1315
1316         if (ret == CCREP_ACCEPT)
1317         {
1318                 memcpy(&sock->addr, &sendaddr, sizeof(struct qsockaddr));
1319                 dfunc.SetSocketPort (&sock->addr, MSG_ReadLong());
1320         }
1321         else
1322         {
1323                 reason = "Bad Response";
1324                 Con_Printf("%s\n", reason);
1325                 strcpy(m_return_reason, reason);
1326                 goto ErrorReturn;
1327         }
1328
1329         dfunc.GetNameFromAddr (&sendaddr, sock->address);
1330
1331         Con_Printf ("Connection accepted to %s\n", sock->address);
1332         sock->lastMessageTime = SetNetTime();
1333
1334         // switch the connection to the specified address
1335         if (dfunc.Connect (newsock, &sock->addr) == -1)
1336         {
1337                 reason = "Connect to Game failed";
1338                 Con_Printf("%s\n", reason);
1339                 strcpy(m_return_reason, reason);
1340                 goto ErrorReturn;
1341         }
1342
1343         m_return_onerror = false;
1344         return sock;
1345
1346 ErrorReturn:
1347         NET_FreeQSocket(sock);
1348 ErrorReturn2:
1349         dfunc.CloseSocket(newsock);
1350         if (m_return_onerror)
1351         {
1352                 key_dest = key_menu;
1353                 m_state = m_return_state;
1354                 m_return_onerror = false;
1355         }
1356         return NULL;
1357 }
1358
1359 qsocket_t *Datagram_Connect (char *host)
1360 {
1361         qsocket_t *ret = NULL;
1362
1363         for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++)
1364                 if (net_landrivers[net_landriverlevel].initialized)
1365                         if ((ret = _Datagram_Connect (host)) != NULL)
1366                                 break;
1367         return ret;
1368 }
1369