2 * Copyright (C) Volition, Inc. 2005. All rights reserved.
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
11 //Game Tracker client code
14 InitGameTracker(int game_type); //D3 or Freespace
16 //Call periodically so we can send our update, and make sure it is received
19 StartTrackerGame(void *buffer) //Call with a freespace_net_game_data or d3_net_game_data structure
20 //Call with a freespace_net_game_data or d3_net_game_data structure
21 //Updates our memory so when it is time, we send the latest game data
22 UpdateGameData(gamedata);
25 //Call to signify end of game
27 RequestGameList();//Sends a GNT_GAMELIST_REQ packet to the server.
29 game_list * GetGameList();//returns a pointer to a game_list struct
35 #include <arpa/inet.h>
36 #include <netinet/in.h>
44 #include "multi_pxo.h"
49 // check structs for size compatibility
50 SDL_COMPILE_TIME_ASSERT(game_packet_header, sizeof(game_packet_header) == 529);
51 SDL_COMPILE_TIME_ASSERT(freespace2_net_game_data, sizeof(freespace2_net_game_data) == 120);
52 SDL_COMPILE_TIME_ASSERT(game_list, sizeof(game_list) == 384);
53 SDL_COMPILE_TIME_ASSERT(filter_game_list_struct, sizeof(filter_game_list_struct) == 40);
57 struct sockaddr_in gtrackaddr;
59 game_list GameBuffer[MAX_GAME_BUFFERS];
60 int GameType;//d3 or fs
62 unsigned int LastTrackerUpdate;
63 unsigned int LastSentToTracker;
64 unsigned int TrackerAckdUs;
65 unsigned int TrackerGameIsRunning;
67 game_packet_header TrackerGameData;
68 game_packet_header GameListReq;
69 game_packet_header TrackAckPacket;
70 game_packet_header GameOverPacket;
73 freespace_net_game_data *FreeSpaceTrackerGameData;
75 freespace2_net_game_data *FreeSpace2TrackerGameData;
79 unsigned int LastGameOverPacket;
80 unsigned int FirstGameOverPacket;
86 static int SerializeGamePacket(const game_packet_header *gph, ubyte *data)
90 PXO_ADD_UINT(gph->len);
91 PXO_ADD_DATA(gph->game_type);
92 PXO_ADD_DATA(gph->junk); // not used, basically just padding for compatibility
93 PXO_ADD_INT(gph->type);
94 PXO_ADD_UINT(gph->sig);
97 // these have no other data
102 // this one may or may not have extra data
103 case GNT_GAMELIST_REQ: {
104 if (gph->len > GAME_HEADER_ONLY_SIZE) {
105 SDL_assert(gph->len == (GAME_HEADER_ONLY_SIZE+sizeof(filter_game_list_struct)));
107 filter_game_list_struct *filter = (filter_game_list_struct *)&gph->data;
109 PXO_ADD_INT(filter->rank);
110 PXO_ADD_DATA(filter->channel);
116 case GNT_GAMEUPDATE: {
117 freespace2_net_game_data *game_data = (freespace2_net_game_data *)&gph->data;
119 PXO_ADD_DATA(game_data->game_name);
120 PXO_ADD_INT(game_data->difficulty);
121 PXO_ADD_INT(game_data->type);
122 PXO_ADD_INT(game_data->state);
123 PXO_ADD_INT(game_data->max_players);
124 PXO_ADD_INT(game_data->current_num_players);
125 PXO_ADD_DATA(game_data->mission_name);
126 PXO_ADD_DATA(game_data->channel);
131 case GNT_GAME_COUNT_REQ: {
132 char channel[CHANNEL_LEN];
134 memcpy(channel, gph->data, sizeof(channel));
136 PXO_ADD_DATA(channel);
141 // we shouldn't be sending any other packet types
147 SDL_assert(packet_size >= (int)GAME_HEADER_ONLY_SIZE);
148 SDL_assert(packet_size == (int)gph->len);
153 static void DeserializeGamePacket(const ubyte *data, const int data_size, game_packet_header *gph)
158 memset(gph, 0, sizeof(game_packet_header));
160 // make sure we received a complete base packet
161 if (data_size < (int)GAME_HEADER_ONLY_SIZE) {
168 PXO_GET_UINT(gph->len);
169 PXO_GET_DATA(gph->game_type);
170 PXO_GET_DATA(gph->junk); // not used, basically just padding for compatibility
171 PXO_GET_INT(gph->type);
172 PXO_GET_UINT(gph->sig);
174 // sanity check data size to make sure we reveived all of the expected packet
175 // (not exactly sure what -1 is for, but that's how it is later)
176 if ((int)gph->len-1 > data_size) {
187 case GNT_GAMELIST_DATA: {
188 game_list *games = (game_list *)&gph->data;
190 PXO_GET_DATA(games->game_type);
192 for (i = 0; i < MAX_GAME_LISTS_PER_PACKET; i++) {
193 PXO_GET_DATA(games->game_name[i]);
196 for (i = 0; i < MAX_GAME_LISTS_PER_PACKET; i++) {
197 PXO_GET_UINT(games->game_server[i]);
200 for (i = 0; i < MAX_GAME_LISTS_PER_PACKET; i++) {
201 PXO_GET_USHORT(games->port[i]);
207 case GNT_GAME_COUNT_DATA: {
211 PXO_GET_INT(n_users);
213 SDL_strlcpy(channel, (char *)(data+offset), SDL_arraysize(channel));
214 offset += strlen(channel);
216 memcpy(gph->data, &n_users, sizeof(int));
217 memcpy(gph->data+sizeof(int), channel, strlen(channel));
226 //SDL_assert(offset == data_size);
230 int InitGameTrackerClient(int gametype)
232 struct sockaddr_in sockaddr;
236 LastTrackerUpdate = 0;
244 TrackerGameData.len = GAME_HEADER_ONLY_SIZE+sizeof(freespace_net_game_data);
253 TrackerGameData.len = GAME_HEADER_ONLY_SIZE+sizeof(freespace2_net_game_data);
261 TrackerGameData.game_type = (unsigned char)gametype; //1==freespace (GT_FREESPACE), 2==D3, 3==tuberacer, etc.
262 TrackerGameData.type = GNT_GAMEUPDATE; //Used to specify what to do ie. Add a new net game (GNT_GAMESTARTED), remove a net game (game over), etc.
265 FreeSpaceTrackerGameData = (freespace_net_game_data *)&TrackerGameData.data;
267 FreeSpace2TrackerGameData = (freespace2_net_game_data *)&TrackerGameData.data;
270 GameListReq.game_type = (unsigned char)gametype;
271 GameListReq.type = GNT_GAMELIST_REQ;
272 GameListReq.len = GAME_HEADER_ONLY_SIZE;
274 TrackAckPacket.game_type = (unsigned char)gametype;
275 TrackAckPacket.len = GAME_HEADER_ONLY_SIZE;
276 TrackAckPacket.type = GNT_CLIENT_ACK;
278 GameOverPacket.game_type = (unsigned char)gametype;
279 GameOverPacket.len = GAME_HEADER_ONLY_SIZE;
280 GameOverPacket.type = GNT_GAMEOVER;
282 // gamesock = socket(AF_INET,SOCK_DGRAM,0);
285 if ( gamesock == INVALID_SOCKET )
287 printf("Unable to open a socket.\n");
292 memset( &sockaddr, 0, sizeof(struct sockaddr_in) );
293 sockaddr.sin_family = AF_INET;
294 sockaddr.sin_addr.s_addr = INADDR_ANY;
295 sockaddr.sin_port = 0;//htons(GAMEPORT);
298 if (SOCKET_ERROR==bind(gamesock, (struct sockaddr*)&sockaddr, sizeof (sockaddr)))
300 printf("Unable to bind a socket.\n");
301 printf("WSAGetLastError() returned %d.\n",WSAGetLastError());
306 iaddr = inet_addr ( Multi_options_g.game_tracker_ip );
307 if ( iaddr == INADDR_NONE ) {
308 // first try and resolve by name
310 he = gethostbyname( Multi_options_g.game_tracker_ip );
315 // try and resolve by address
316 unsigned int n_order = inet_addr(Multi_game_tracker_ip_address);
317 he = gethostbyaddr((char*)&n_order,4,PF_INET);
325 iaddr = ((in_addr *)(he->h_addr))->s_addr;
328 // This would be a good place to resolve the IP based on a domain name
329 gtrackaddr.sin_addr.s_addr = iaddr;
330 gtrackaddr.sin_family = AF_INET;
331 gtrackaddr.sin_port = htons( GAMEPORT );
340 void IdleGameTracker()
343 struct timeval timeout;
344 ubyte packet_data[sizeof(game_packet_header)];
345 int packet_length = 0;
347 PSNET_TOP_LAYER_PROCESS();
351 if((TrackerGameIsRunning) && ((timer_get_seconds()-LastTrackerUpdate)>TRACKER_UPDATE_INTERVAL) && !SendingGameOver)
353 //Time to update the tracker again
354 packet_length = SerializeGamePacket(&TrackerGameData, packet_data);
355 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);
357 LastTrackerUpdate = timer_get_seconds();
359 else if((TrackerGameIsRunning)&&(!TrackerAckdUs)&&((timer_get_milliseconds()-LastSentToTracker)>TRACKER_RESEND_TIME))
361 //We still haven't been acked by the last packet and it's time to resend.
362 packet_length = SerializeGamePacket(&TrackerGameData, packet_data);
363 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);
365 LastTrackerUpdate = timer_get_seconds();
366 LastSentToTracker = timer_get_milliseconds();
371 if((timer_get_milliseconds()-LastGameOverPacket)>TRACKER_RESEND_TIME){
373 packet_length = SerializeGamePacket(&GameOverPacket, packet_data);
374 LastGameOverPacket = timer_get_milliseconds();
375 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);
378 else if((timer_get_milliseconds()-FirstGameOverPacket)>NET_ACK_TIMEOUT) {
379 //Giving up, it timed out.
389 FD_SET(Unreliable_socket, &read_fds);
392 if(SELECT(0,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_GAME_TRACKER))
394 if(SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_GAME_TRACKER))
397 unsigned int bytesin;
399 struct sockaddr_in fromaddr;
401 game_packet_header inpacket;
402 addrsize = sizeof(struct sockaddr_in);
404 bytesin = RECVFROM(Unreliable_socket, (char *)&packet_data, sizeof(game_packet_header), 0, (struct sockaddr *)&fromaddr, &addrsize, PSNET_TYPE_GAME_TRACKER);
405 DeserializeGamePacket(packet_data, bytesin, &inpacket);
408 int wserr=WSAGetLastError();
409 mprintf(("RECVFROM() failure. WSAGetLastError() returned %d\n",wserr));
413 // subtract one from the header
416 //Check to make sure the packets ok
417 if(bytesin==inpacket.len)
419 switch(inpacket.type)
422 //The server got our packet so we can stop sending now
425 // 7/13/98 -- because of the FreeSpace iterative frame process -- set this value to 0, instead
426 // of to 2 (as it originally was) since we call SendGameOver() only once. Once we get the ack
427 // from the server, we can assume that we are done.
428 // need to mark this as 0
431 case GNT_GAMELIST_DATA:
433 //Woohoo! Game data! put it in the buffer (if one's free)
434 for(i=0;i<MAX_GAME_BUFFERS;i++)
436 if(GameBuffer[i].game_type==GT_UNUSED)
438 memcpy(&GameBuffer[i],&inpacket.data,sizeof(game_list));
439 i=MAX_GAME_BUFFERS+1;
444 case GNT_GAME_COUNT_DATA:
445 //Here, inpacket.data contains the following structure
448 // char channel[];//Null terminated
450 //You can add whatever code, or callback, etc. you need to deal with this data
452 // let the PXO screen know about this data
456 // get the user count
457 memcpy(&num_servers,inpacket.data,sizeof(int));
459 // copy the channel name
460 SDL_strlcpy(channel, inpacket.data+sizeof(int), SDL_arraysize(channel));
462 // send it to the PXO screen
463 multi_pxo_channel_count_update(channel,num_servers);
466 AckPacket(inpacket.sig);
471 void UpdateGameData(void *buffer)
480 memcpy(FreeSpaceTrackerGameData,buffer,sizeof(freespace_net_game_data));
488 memcpy(FreeSpace2TrackerGameData,buffer,sizeof(freespace2_net_game_data));
498 game_list * GetGameList()
501 for(int i=0;i<MAX_GAME_BUFFERS;i++)
503 if(GameBuffer[i].game_type!=GT_UNUSED)
505 memcpy(&gl,&GameBuffer[i],sizeof(game_list));
506 GameBuffer[i].game_type = GT_UNUSED;
513 void RequestGameList()
515 ubyte packet_data[sizeof(game_packet_header)];
516 int packet_length = 0;
518 GameListReq.len = GAME_HEADER_ONLY_SIZE;
520 packet_length = SerializeGamePacket(&GameListReq, packet_data);
521 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);
524 void RequestGameListWithFilter(void *filter)
526 ubyte packet_data[sizeof(game_packet_header)];
527 int packet_length = 0;
529 memcpy(&GameListReq.data,filter,sizeof(filter_game_list_struct));
530 GameListReq.len = GAME_HEADER_ONLY_SIZE+sizeof(filter_game_list_struct);
532 packet_length = SerializeGamePacket(&GameListReq, packet_data);
533 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);
540 TrackerGameIsRunning = 0;
541 sendto(gamesock,(const char *)&GameOverPacket,GameOverPacket.len,0,(struct sockaddr *)>rackaddr,sizeof(struct sockaddr_in));
548 ubyte packet_data[sizeof(game_packet_header)];
549 int packet_length = 0;
551 if(SendingGameOver==2)
556 if(SendingGameOver==1)
558 //Wait until it's sent.
562 if(SendingGameOver==0)
564 LastGameOverPacket = timer_get_milliseconds();
565 FirstGameOverPacket = timer_get_milliseconds();
567 TrackerGameIsRunning = 0;
569 packet_length = SerializeGamePacket(&GameOverPacket, packet_data);
570 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);
578 void AckPacket(int sig)
580 ubyte packet_data[sizeof(game_packet_header)];
581 int packet_length = 0;
583 TrackAckPacket.sig = sig;
585 packet_length = SerializeGamePacket(&TrackAckPacket, packet_data);
586 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);
589 void StartTrackerGame(void *buffer)
598 memcpy(FreeSpaceTrackerGameData,buffer,sizeof(freespace_net_game_data));
606 memcpy(FreeSpace2TrackerGameData,buffer,sizeof(freespace2_net_game_data));
614 TrackerGameIsRunning = 1;
615 LastTrackerUpdate = 0;
619 void RequestGameCountWithFilter(void *filter)
621 game_packet_header GameCountReq;
622 ubyte packet_data[sizeof(game_packet_header)];
623 int packet_length = 0;
626 GameCountReq.game_type = GT_FREESPACE;
628 GameCountReq.game_type = GT_FREESPACE2;
630 GameCountReq.type = GNT_GAME_COUNT_REQ;
631 GameCountReq.len = GAME_HEADER_ONLY_SIZE+sizeof(filter_game_list_struct);
632 memcpy(&GameCountReq.data, ((filter_game_list_struct*)filter)->channel, sizeof(filter_game_list_struct) - 4);
634 packet_length = SerializeGamePacket(&GameCountReq, packet_data);
635 SENDTO(Unreliable_socket, (char *)&packet_data, packet_length, 0, (struct sockaddr *)>rackaddr, sizeof(struct sockaddr_in), PSNET_TYPE_GAME_TRACKER);