src/network/valid.cpp

   1 /*
   2  * Copyright (C) Volition, Inc. 2005.  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 the
   6  * source.
   7  *
   8 */
   9
  10
  11 //Validate tracker user class
  12
  13
  14 #ifdef PLAT_UNIX
  15 #include <arpa/inet.h>
  16 #include <netinet/in.h>
  17 #include <errno.h>
  18 #include <netdb.h>
  19 #endif
  20
  21 #include "multi.h"
  22 #include "ptrack.h"
  23 #include "valid.h"
  24 #include "psnet.h"
  25 #include "timer.h"
  26
  27
  28 // check structs for size compatibility
  29 SDL_COMPILE_TIME_ASSERT(vmt_validate_mission_req_struct, sizeof(vmt_validate_mission_req_struct) == 104);
  30
  31
  32 // Variables
  33 udp_packet_header PacketHeader;
  34 validate_id_request *ValidIDReq;
  35
  36 int ValidState;
  37
  38 // SOCKET validsock;
  39 struct sockaddr_in      rtrackaddr;
  40
  41 int ValidFirstSent;
  42 int ValidLastSent;
  43
  44 char *Psztracker_id;
  45
  46 // mission validation
  47 int MissionValidState;
  48 int MissionValidFirstSent;
  49 int MissionValidLastSent;
  50
  51 // squad war validation
  52 int SquadWarValidState;
  53 int SquadWarFirstSent;
  54 int SquadWarLastSent;
  55
  56 // squad war response
  57 squad_war_response SquadWarValidateResponse;
  58
  59
  60 static int SerializeValidatePacket(const udp_packet_header *uph, ubyte *data)
  61 {
  62         int packet_size = 0;
  63         int i;
  64
  65         PXO_ADD_DATA(uph->type);
  66         PXO_ADD_USHORT(uph->len);
  67         PXO_ADD_UINT(uph->code);
  68         PXO_ADD_USHORT(uph->xcode);
  69         PXO_ADD_UINT(uph->sig);
  70         PXO_ADD_UINT(uph->security);
  71
  72         switch (uph->type) {
  73                 // no extra data for this
  74                 case UNT_CONTROL:
  75                         break;
  76
  77                 case UNT_LOGIN_AUTH_REQUEST: {
  78                         validate_id_request *id_req = (validate_id_request *)&uph->data;
  79
  80                         PXO_ADD_DATA(id_req->login);
  81                         PXO_ADD_DATA(id_req->password);
  82                         PXO_ADD_DATA(id_req->tracker_id);       // junk here, just for size
  83
  84                         break;
  85                 }
  86
  87                 case UNT_VALID_FS2_MSN_REQ: {
  88                         vmt_validate_mission_req_struct *mis_req = (vmt_validate_mission_req_struct *)&uph->data;
  89
  90                         PXO_ADD_UINT(mis_req->checksum);
  91
  92                         memcpy(data+packet_size, mis_req->file_name, strlen(mis_req->file_name));
  93                         packet_size += strlen(mis_req->file_name);
  94
  95                         data[packet_size] = '\0';
  96                         packet_size++;
  97
  98                         break;
  99                 }
 100
 101                 case UNT_VALID_SW_MSN_REQ: {
 102                         squad_war_request *sw_req = (squad_war_request *)&uph->data;
 103
 104                         for (i = 0; i < MAX_SQUAD_PLAYERS; i++) {
 105                                 PXO_ADD_INT(sw_req->squad_plr1[i]);
 106                         }
 107
 108                         for (i = 0; i < MAX_SQUAD_PLAYERS; i++) {
 109                                 PXO_ADD_INT(sw_req->squad_plr2[i]);
 110                         }
 111
 112                         PXO_ADD_DATA(sw_req->squad_count1);
 113                         PXO_ADD_DATA(sw_req->squad_count2);
 114
 115                         PXO_ADD_DATA(sw_req->match_code);
 116
 117                         PXO_ADD_DATA(sw_req->mission_filename);
 118                         PXO_ADD_INT(sw_req->mission_checksum);
 119
 120                         break;
 121                 }
 122
 123                 // we shouldn't be sending any other packet types
 124                 default:
 125                         Int3();
 126                         break;
 127         }
 128
 129         SDL_assert(packet_size >= (int)PACKED_HEADER_ONLY_SIZE);
 130         SDL_assert(packet_size == (int)uph->len);
 131
 132         return packet_size;
 133 }
 134
 135 static void DeserializeValidatePacket(const ubyte *data, const int data_size, udp_packet_header *uph)
 136 {
 137         int offset = 0;
 138
 139         memset(uph, 0, sizeof(udp_packet_header));
 140
 141         // make sure we received a complete base packet
 142         if (data_size < (int)PACKED_HEADER_ONLY_SIZE) {
 143                 uph->len = 0;
 144                 uph->type = 0xff;
 145
 146                 return;
 147         }
 148
 149         PXO_GET_DATA(uph->type);
 150         PXO_GET_USHORT(uph->len);
 151         PXO_GET_UINT(uph->code);
 152         PXO_GET_USHORT(uph->xcode);
 153         PXO_GET_UINT(uph->sig);
 154         PXO_GET_UINT(uph->security);
 155
 156         // sanity check data size to make sure we reveived all of the expected packet
 157         // (not exactly sure what -1 is for, but that's how it is later)
 158         if ((int)uph->len-1 > data_size) {
 159                 uph->len = 0;
 160                 uph->type = 0xff;
 161
 162                 return;
 163         }
 164
 165         switch (uph->type) {
 166                 // no extra data for these
 167                 case UNT_CONTROL:
 168                 case UNT_CONTROL_VALIDATION:
 169                 case UNT_LOGIN_NO_AUTH:
 170                 case UNT_VALID_FS_MSN_RSP:
 171                 case UNT_VALID_FS2_MSN_RSP:
 172                         break;
 173
 174                 case UNT_LOGIN_AUTHENTICATED: {
 175                         SDL_strlcpy((char *)uph->data, (const char *)(data+offset), SDL_arraysize(uph->data));
 176                         break;
 177                 }
 178
 179                 case UNT_VALID_SW_MSN_RSP: {
 180                         squad_war_response *sw_resp = (squad_war_response *)&uph->data;
 181
 182                         PXO_GET_DATA(sw_resp->reason);
 183                         PXO_GET_DATA(sw_resp->accepted);
 184
 185                         break;
 186                 }
 187
 188                 default:
 189                         break;
 190         }
 191
 192         //SDL_assert(offset == data_size);
 193 }
 194
 195
 196 int InitValidateClient(void)
 197 {
 198         struct sockaddr_in sockaddr;
 199         in_addr_t iaddr;
 200         ValidFirstSent = 0;
 201         ValidLastSent = 0;
 202         ValidState = VALID_STATE_IDLE;
 203
 204         MissionValidFirstSent = 0;
 205         MissionValidLastSent = 0;
 206         MissionValidState = VALID_STATE_IDLE;
 207
 208         SquadWarFirstSent = 0;
 209         SquadWarLastSent = 0;
 210         SquadWarValidState = VALID_STATE_IDLE;
 211
 212         /*
 213         validsock = socket(AF_INET,SOCK_DGRAM,0);
 214         if ( validsock == INVALID_SOCKET )
 215         {
 216                 printf("Unable to open a socket.\n");
 217                 return 0;
 218         }
 219         */
 220
 221         memset( &sockaddr, 0, sizeof(struct sockaddr_in) );
 222         sockaddr.sin_family = AF_INET;
 223         sockaddr.sin_addr.s_addr = INADDR_ANY;
 224         sockaddr.sin_port = 0;
 225
 226         /*
 227         if (SOCKET_ERROR==bind(validsock, (struct sockaddr*)&sockaddr, sizeof (sockaddr)))
 228         {
 229                 printf("Unable to bind a socket.\n");
 230                 printf("WSAGetLastError() returned %d.\n",WSAGetLastError());
 231                 return 0;
 232         }
 233         */
 234
 235         rtrackaddr.sin_family = AF_INET;
 236         iaddr = inet_addr( Multi_options_g.user_tracker_ip );
 237         if ( iaddr == INADDR_NONE ) {
 238                 struct hostent *he;
 239                 he = gethostbyname( Multi_options_g.user_tracker_ip );
 240                 if(!he)
 241                         return 0;
 242         /*
 243                 {
 244                         // try and resolve by address
 245                         unsigned int n_order = inet_addr(Multi_user_tracker_ip_address);
 246                         he = gethostbyaddr((char*)&n_order,4,PF_INET);
 247
 248                         if(!he){
 249                                 return 0;
 250                         }
 251                 }
 252         */
 253                 iaddr = ((in_addr *)(he->h_addr))->s_addr;
 254         }
 255
 256         rtrackaddr.sin_addr.s_addr = iaddr;
 257         rtrackaddr.sin_port = htons(REGPORT);
 258
 259         return 1;
 260
 261 }
 262
 263 //Call with a valid struct to validate a user
 264 //Call with NULL to poll
 265
 266 //Return codes:
 267 // -3   Still waiting (returned if we were waiting for a tracker response and ValidateUser was called with a non-NULL value
 268 // -2 Timeout waiting for tracker to respond
 269 // -1   User invalid
 270 //  0   Still waiting for response from tracker/Idle
 271 //  1   User valid
 272 int ValidateUser(validate_id_request *valid_id, char *trackerid)
 273 {
 274         ubyte packet_data[sizeof(udp_packet_header)];
 275         int packet_length = 0;
 276
 277         ValidIdle();
 278         if(valid_id==NULL)
 279         {
 280                 switch(ValidState)
 281                 {
 282                 case VALID_STATE_IDLE:
 283                         return 0;
 284                         break;
 285                 case VALID_STATE_WAITING:
 286                         return 0;
 287                         break;
 288                 case VALID_STATE_VALID:
 289                         ValidState = VALID_STATE_IDLE;
 290                         return 1;
 291                         break;
 292                 case VALID_STATE_INVALID:
 293                         ValidState = VALID_STATE_IDLE;
 294                         return -1;
 295                 case VALID_STATE_TIMEOUT:
 296                         ValidState = VALID_STATE_IDLE;
 297                         return -2;
 298                 }
 299                 return 0;
 300         }
 301         else
 302         {
 303                 if(ValidState==VALID_STATE_IDLE)
 304                 {
 305                         //First, flush the input buffer for the socket
 306                         fd_set read_fds;
 307                         struct timeval timeout;
 308
 309                         timeout.tv_sec=0;
 310                         timeout.tv_usec=0;
 311
 312                         FD_ZERO(&read_fds);
 313                         FD_SET(Unreliable_socket, &read_fds);
 314
 315                         while(SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_VALIDATION))
 316                         {
 317                                 int addrsize;
 318                                 struct sockaddr_in fromaddr;
 319
 320                                 udp_packet_header inpacket;
 321                                 addrsize = sizeof(struct sockaddr_in);
 322                                 RECVFROM(Unreliable_socket, (char *)&inpacket,sizeof(udp_packet_header),0,(struct sockaddr *)&fromaddr,&addrsize, PSNET_TYPE_VALIDATION);
 323                         }
 324                         Psztracker_id = trackerid;
 325
 326                         //Build the request packet
 327                         PacketHeader.type = UNT_LOGIN_AUTH_REQUEST;
 328                         PacketHeader.len = PACKED_HEADER_ONLY_SIZE+sizeof(validate_id_request);
 329                         ValidIDReq=(validate_id_request *)&PacketHeader.data;
 330                         SDL_strlcpy(ValidIDReq->login, valid_id->login, SDL_arraysize(ValidIDReq->login));
 331                         SDL_strlcpy(ValidIDReq->password, valid_id->password, SDL_arraysize(ValidIDReq->password));
 332
 333                         packet_length = SerializeValidatePacket(&PacketHeader, packet_data);
 334                         SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)&rtrackaddr, sizeof(struct sockaddr), PSNET_TYPE_VALIDATION);
 335                         ValidState = VALID_STATE_WAITING;
 336                         ValidFirstSent = timer_get_milliseconds();
 337                         ValidLastSent = timer_get_milliseconds();
 338                         return 0;
 339                 }
 340                 else
 341                 {
 342                         return -3;
 343                 }
 344         }
 345 }
 346
 347
 348 void ValidIdle()
 349 {
 350         fd_set read_fds;
 351         struct timeval timeout;
 352         ubyte packet_data[sizeof(udp_packet_header)];
 353         int packet_length = 0;
 354
 355         PSNET_TOP_LAYER_PROCESS();
 356
 357         timeout.tv_sec=0;
 358         timeout.tv_usec=0;
 359
 360         FD_ZERO(&read_fds);
 361         FD_SET(Unreliable_socket, &read_fds);
 362
 363         if(SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_VALIDATION)){
 364                 int bytesin;
 365                 int addrsize;
 366                 struct sockaddr_in fromaddr;
 367
 368                 udp_packet_header inpacket;
 369
 370                 SDL_zero(inpacket);
 371                 addrsize = sizeof(struct sockaddr_in);
 372
 373                 bytesin = RECVFROM(Unreliable_socket, (char *)&packet_data, sizeof(udp_packet_header), 0, (struct sockaddr *)&fromaddr, &addrsize, PSNET_TYPE_VALIDATION);
 374
 375                 if (bytesin > 0) {
 376                         DeserializeValidatePacket(packet_data, bytesin, &inpacket);
 377
 378                         // decrease packet size by 1
 379                         inpacket.len--;
 380 #ifndef NDEBUG
 381                 } else {
 382                         int wserr=WSAGetLastError();
 383                         mprintf(("recvfrom() failure. WSAGetLastError() returned %d\n",wserr));
 384 #endif
 385                 }
 386
 387                 FD_ZERO(&read_fds);
 388                 FD_SET(Unreliable_socket, &read_fds);
 389
 390                 //Check to make sure the packets ok
 391                 if ( (bytesin > 0) && (bytesin == inpacket.len) ) {
 392                         switch(inpacket.type)
 393                         {
 394                                 case UNT_LOGIN_NO_AUTH:
 395                                         if(ValidState == VALID_STATE_WAITING)
 396                                         {
 397                                                 ValidState = VALID_STATE_INVALID;
 398                                         }
 399                                         break;
 400                                 case UNT_LOGIN_AUTHENTICATED:
 401                                         if(ValidState == VALID_STATE_WAITING)
 402                                         {
 403                                                 ValidState = VALID_STATE_VALID;
 404                                                 SDL_strlcpy(Psztracker_id, (const char *)&inpacket.data, TRACKER_ID_LEN);
 405                                         }
 406                                         break;
 407                                 // old - this is a Freespace 1 packet type
 408                                 case UNT_VALID_FS_MSN_RSP:
 409                                         Int3();
 410                                         break;
 411
 412                                 // fs2 mission validation response
 413                                 case UNT_VALID_FS2_MSN_RSP:
 414                                         if(MissionValidState == VALID_STATE_WAITING){
 415                                                 if(inpacket.code==2){
 416                                                         MissionValidState = VALID_STATE_VALID;
 417                                                 } else {
 418                                                         MissionValidState = VALID_STATE_INVALID;
 419                                                 }
 420                                         }
 421                                         break;
 422
 423                                 // fs2 squad war validation response
 424                                 case UNT_VALID_SW_MSN_RSP:
 425                                         if(SquadWarValidState == VALID_STATE_WAITING){
 426                                                 // copy the data
 427                                                 SDL_assert((bytesin - PACKED_HEADER_ONLY_SIZE) == sizeof(squad_war_response));
 428                                                 if((bytesin - PACKED_HEADER_ONLY_SIZE) == sizeof(squad_war_response)){
 429                                                         memset(&SquadWarValidateResponse, 0, sizeof(squad_war_response));
 430                                                         memcpy(&SquadWarValidateResponse, inpacket.data, sizeof(squad_war_response));
 431
 432                                                         // now check to see if we're good
 433                                                         if(SquadWarValidateResponse.accepted){
 434                                                                 SquadWarValidState = VALID_STATE_VALID;
 435                                                         } else {
 436                                                                 SquadWarValidState = VALID_STATE_INVALID;
 437                                                         }
 438                                                 } else {
 439                                                         SquadWarValidState = VALID_STATE_INVALID;
 440                                                 }
 441                                         }
 442                                         break;
 443
 444                                 case UNT_CONTROL_VALIDATION:
 445                                         Int3();
 446                                         break;
 447
 448                                 case UNT_CONTROL:
 449                                         Int3();
 450                                         break;
 451                         }
 452                         AckValidServer(inpacket.sig);
 453                 }
 454         }
 455
 456         if(ValidState == VALID_STATE_WAITING)
 457         {
 458                 if((timer_get_milliseconds()-ValidFirstSent)>=PILOT_REQ_TIMEOUT)
 459                 {
 460                         ValidState = VALID_STATE_TIMEOUT;
 461
 462                 }
 463                 else if((timer_get_milliseconds()-ValidLastSent)>=PILOT_REQ_RESEND_TIME)
 464                 {
 465                         //Send 'da packet
 466                         packet_length = SerializeValidatePacket(&PacketHeader, packet_data);
 467                         SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)&rtrackaddr, sizeof(struct sockaddr), PSNET_TYPE_VALIDATION);
 468                         ValidLastSent = timer_get_milliseconds();
 469                 }
 470         }
 471 }
 472
 473
 474 //Send an ACK to the server
 475 void AckValidServer(unsigned int sig)
 476 {
 477         udp_packet_header ack_pack;
 478         ubyte packet_data[sizeof(udp_packet_header)];
 479         int packet_length = 0;
 480
 481         ack_pack.type = UNT_CONTROL;
 482         ack_pack.sig = sig;
 483         ack_pack.code = CMD_CLIENT_RECEIVED;
 484         ack_pack.len = PACKED_HEADER_ONLY_SIZE;
 485
 486         packet_length = SerializeValidatePacket(&ack_pack, packet_data);
 487         SDL_assert(packet_length == PACKED_HEADER_ONLY_SIZE);
 488         SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)&rtrackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_VALIDATION);
 489 }
 490
 491 // call with a valid struct to validate a mission
 492 // call with NULL to poll
 493
 494 // Return codes:
 495 // -3   Still waiting (returned if we were waiting for a tracker response and ValidateMission was called with a non-NULL value
 496 // -2 Timeout waiting for tracker to respond
 497 // -1   User invalid
 498 //  0   Still waiting for response from tracker/Idle
 499 //  1   User valid
 500 int ValidateMission(vmt_validate_mission_req_struct *valid_msn)
 501 {
 502         ubyte packet_data[sizeof(udp_packet_header)];
 503         int packet_length = 0;
 504
 505         ValidIdle();
 506         if(valid_msn==NULL)
 507         {
 508                 switch(MissionValidState)
 509                 {
 510                 case VALID_STATE_IDLE:
 511                         return 0;
 512                         break;
 513                 case VALID_STATE_WAITING:
 514                         return 0;
 515                         break;
 516                 case VALID_STATE_VALID:
 517                         MissionValidState = VALID_STATE_IDLE;
 518                         return 1;
 519                         break;
 520                 case VALID_STATE_INVALID:
 521                         MissionValidState = VALID_STATE_IDLE;
 522                         return -1;
 523                 case VALID_STATE_TIMEOUT:
 524                         MissionValidState = VALID_STATE_IDLE;
 525                         return -2;
 526                 }
 527                 return 0;
 528         }
 529         else
 530         {
 531                 if(MissionValidState==VALID_STATE_IDLE)
 532                 {
 533                         //First, flush the input buffer for the socket
 534                         fd_set read_fds;
 535                         struct timeval timeout;
 536
 537                         timeout.tv_sec=0;
 538                         timeout.tv_usec=0;
 539
 540                         FD_ZERO(&read_fds);
 541                         FD_SET(Unreliable_socket, &read_fds);
 542
 543                         while(SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_VALIDATION))
 544                         {
 545                                 int addrsize;
 546                                 struct sockaddr_in fromaddr;
 547
 548                                 udp_packet_header inpacket;
 549                                 addrsize = sizeof(struct sockaddr_in);
 550                                 RECVFROM(Unreliable_socket, (char *)&inpacket,sizeof(udp_packet_header),0,(struct sockaddr *)&fromaddr,&addrsize, PSNET_TYPE_VALIDATION);
 551                                 FD_ZERO(&read_fds);
 552                                 FD_SET(Unreliable_socket, &read_fds);
 553                         }
 554                         //only send the header, the checksum and the string length plus the null
 555                         PacketHeader.type = UNT_VALID_FS2_MSN_REQ;
 556                         PacketHeader.len = (short)(PACKED_HEADER_ONLY_SIZE + sizeof(int)+1+strlen(valid_msn->file_name));
 557                         memcpy(PacketHeader.data,valid_msn,PacketHeader.len-PACKED_HEADER_ONLY_SIZE);
 558                         packet_length = SerializeValidatePacket(&PacketHeader, packet_data);
 559                         SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)&rtrackaddr, sizeof(struct sockaddr), PSNET_TYPE_VALIDATION);
 560                         MissionValidState = VALID_STATE_WAITING;
 561                         MissionValidFirstSent = timer_get_milliseconds();
 562                         MissionValidLastSent = timer_get_milliseconds();
 563                         return 0;
 564                 }
 565                 else
 566                 {
 567                         return -3;
 568                 }
 569         }
 570 }
 571
 572 // query the usertracker to validate a squad war match
 573 // call with a valid struct to validate a mission
 574 // call with NULL to poll
 575
 576 // Return codes:
 577 // -3   Still waiting (returned if we were waiting for a tracker response and ValidateSquadWae was called with a non-NULL value
 578 // -2 Timeout waiting for tracker to respond
 579 // -1   match invalid
 580 //  0   Still waiting for response from tracker/Idle
 581 //  1   match valid
 582 int ValidateSquadWar(squad_war_request *sw_req, squad_war_response *sw_resp)
 583 {
 584         ubyte packet_data[sizeof(udp_packet_header)];
 585         int packet_length = 0;
 586
 587         ValidIdle();
 588         if(sw_req==NULL){
 589                 switch(SquadWarValidState){
 590                 case VALID_STATE_IDLE:
 591                         return 0;
 592                         break;
 593                 case VALID_STATE_WAITING:
 594                         return 0;
 595                         break;
 596
 597                 // fill in the response
 598                 case VALID_STATE_VALID:
 599                         SquadWarValidState = VALID_STATE_IDLE;
 600                         if(sw_resp != NULL){
 601                                 memcpy(sw_resp, &SquadWarValidateResponse, sizeof(squad_war_response));
 602                         }
 603                         return 1;
 604                         break;
 605                 // fill in the response
 606                 case VALID_STATE_INVALID:
 607                         SquadWarValidState = VALID_STATE_IDLE;
 608                         if(sw_resp != NULL){
 609                                 memcpy(sw_resp, &SquadWarValidateResponse, sizeof(squad_war_response));
 610                         }
 611                         return -1;
 612
 613                 case VALID_STATE_TIMEOUT:
 614                         SquadWarValidState = VALID_STATE_IDLE;
 615                         return -2;
 616                 }
 617                 return 0;
 618         } else {
 619                 if(SquadWarValidState==VALID_STATE_IDLE){
 620                         // First, flush the input buffer for the socket
 621                         fd_set read_fds;
 622                         struct timeval timeout;
 623
 624                         timeout.tv_sec=0;
 625                         timeout.tv_usec=0;
 626
 627                         FD_ZERO(&read_fds);
 628                         FD_SET(Unreliable_socket, &read_fds);
 629
 630                         while(SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_VALIDATION)){
 631                                 int addrsize;
 632                                 struct sockaddr_in fromaddr;
 633
 634                                 udp_packet_header inpacket;
 635                                 addrsize = sizeof(struct sockaddr_in);
 636                                 RECVFROM(Unreliable_socket, (char *)&inpacket,sizeof(udp_packet_header),0,(struct sockaddr *)&fromaddr,&addrsize, PSNET_TYPE_VALIDATION);
 637                                 FD_ZERO(&read_fds);
 638                                 FD_SET(Unreliable_socket, &read_fds);
 639                         }
 640                         // only send the header, the checksum and the string length plus the null
 641                         PacketHeader.type = UNT_VALID_SW_MSN_REQ;
 642                         PacketHeader.len = (short)(PACKED_HEADER_ONLY_SIZE + sizeof(squad_war_request));
 643                         memcpy(PacketHeader.data, sw_req, PacketHeader.len-PACKED_HEADER_ONLY_SIZE);
 644                         packet_length = SerializeValidatePacket(&PacketHeader, packet_data);
 645                         SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)&rtrackaddr, sizeof(struct sockaddr), PSNET_TYPE_VALIDATION);
 646                         SquadWarValidState = VALID_STATE_WAITING;
 647                         SquadWarFirstSent = timer_get_milliseconds();
 648                         SquadWarLastSent = timer_get_milliseconds();
 649                         return 0;
 650                 } else {
 651                         return -3;
 652                 }
 653         }
 654 }