1 /***********************************************************
2 * Rocks'n'Diamonds -- McDuffin Strikes Back! *
3 *----------------------------------------------------------*
4 * (c) 1995-2006 Artsoft Entertainment *
6 * Detmolder Strasse 189 *
9 * e-mail: info@artsoft.org *
10 *----------------------------------------------------------*
12 ***********************************************************/
14 #include "libgame/platform.h"
16 #if defined(NETWORK_AVALIABLE)
21 #if defined(TARGET_SDL)
25 #include <sys/socket.h>
26 #include <netinet/in.h>
27 #include <netinet/tcp.h>
28 #include <arpa/inet.h>
32 #include "libgame/libgame.h"
42 struct NetworkClientPlayerInfo
45 char name[MAX_PLAYER_NAME_LEN + 1];
46 struct NetworkClientPlayerInfo *next;
49 static struct NetworkClientPlayerInfo first_player =
58 #if defined(TARGET_SDL)
59 static TCPsocket sfd; /* server socket */
60 static SDLNet_SocketSet rfds; /* socket set */
62 static int sfd; /* server socket */
65 static byte realbuffer[512];
66 static byte readbuffer[MAX_BUFFER_SIZE], writbuffer[MAX_BUFFER_SIZE];
67 static byte *buffer = realbuffer + 4;
68 static int nread = 0, nwrite = 0;
69 static boolean stop_network_game = FALSE;
71 static void SendBufferToServer(int size)
76 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
77 realbuffer[3] = (byte)size;
80 if (nwrite + 4 + size >= MAX_BUFFER_SIZE)
81 Error(ERR_EXIT, "internal error: network send buffer overflow");
83 memcpy(writbuffer + nwrite, realbuffer, 4 + size);
86 /* directly send the buffer to the network server */
87 #if defined(TARGET_SDL)
88 SDLNet_TCP_Send(sfd, writbuffer, nwrite);
90 if (write(sfd, writbuffer, nwrite) == -1)
91 Error(ERR_WARN, "write() failed; %s", strerror(errno));
96 struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr)
98 struct NetworkClientPlayerInfo *player = NULL;
100 for (player = &first_player; player; player = player->next)
101 if (player->nr == player_nr)
104 if (player == NULL) /* should not happen */
105 Error(ERR_EXIT, "protocol error: reference to non-existing player %d",
111 char *getNetworkPlayerName(int player_nr)
113 struct NetworkClientPlayerInfo *player;
116 return("the network game server");
117 else if (player_nr == first_player.nr)
120 for (player = &first_player; player; player = player->next)
121 if (player->nr == player_nr && player->name && strlen(player->name))
122 return(player->name);
124 return(EMPTY_PLAYER_NAME);
127 static void StartNetworkServer(int port)
129 #if defined(TARGET_SDL)
133 #if defined(TARGET_SDL2)
134 server_thread = SDL_CreateThread(NetworkServerThread,
135 "NetworkServerThread", &p);
137 server_thread = SDL_CreateThread(NetworkServerThread, &p);
139 network_server = TRUE;
146 NetworkServer(port, options.serveronly);
153 "cannot create network server process - no network playing");
154 options.network = FALSE;
158 /* we are parent process -- resume normal operation */
164 #if defined(TARGET_SDL)
165 boolean ConnectToServer(char *hostname, int port)
171 port = DEFAULT_SERVER_PORT;
173 rfds = SDLNet_AllocSocketSet(1);
177 SDLNet_ResolveHost(&ip, hostname, port);
178 if (ip.host == INADDR_NONE)
179 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
183 SDLNet_Write32(0x7f000001, &ip.host); /* 127.0.0.1 */
184 SDLNet_Write16(port, &ip.port);
187 sfd = SDLNet_TCP_Open(&ip);
191 SDLNet_TCP_AddSocket(rfds, sfd);
196 printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError());
199 if (hostname) /* connect to specified server failed */
202 printf("No rocksndiamonds server on localhost -- starting up one ...\n");
203 StartNetworkServer(port);
205 /* wait for server to start up and try connecting several times */
206 for (i = 0; i < 6; i++)
208 Delay(500); /* wait 500 ms == 0.5 seconds */
210 if ((sfd = SDLNet_TCP_Open(&ip))) /* connected */
212 SDLNet_TCP_AddSocket(rfds, sfd);
217 /* when reaching this point, connect to newly started server has failed */
223 boolean ConnectToServer(char *hostname, int port)
225 struct sockaddr_in s;
226 struct protoent *tcpproto;
231 if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1)
233 struct hostent *host;
235 if ((host = gethostbyname(hostname)) == NULL)
236 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
238 s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]);
242 s.sin_addr.s_addr = inet_addr("127.0.0.1"); /* localhost */
245 port = DEFAULT_SERVER_PORT;
247 s.sin_port = htons(port);
248 s.sin_family = AF_INET;
250 sfd = socket(PF_INET, SOCK_STREAM, 0);
252 Error(ERR_EXIT, "out of file descriptors");
254 if ((tcpproto = getprotobyname("tcp")) != NULL)
255 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
257 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */
260 if (hostname) /* connect to specified server failed */
263 printf("No rocksndiamonds server on localhost -- starting up one ...\n");
264 StartNetworkServer(port);
266 /* wait for server to start up and try connecting several times */
267 for (i = 0; i < 6; i++)
269 Delay(500); /* wait 500 ms == 0.5 seconds */
272 sfd = socket(PF_INET, SOCK_STREAM, 0);
274 Error(ERR_EXIT, "out of file descriptors");
276 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
278 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */
282 /* when reaching this point, connect to newly started server has failed */
285 #endif /* defined(TARGET_SDL) */
287 void SendToServer_PlayerName(char *player_name)
289 int len_player_name = strlen(player_name);
291 buffer[1] = OP_PLAYER_NAME;
292 memcpy(&buffer[2], player_name, len_player_name);
293 SendBufferToServer(2 + len_player_name);
294 Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
297 void SendToServer_ProtocolVersion()
299 buffer[1] = OP_PROTOCOL_VERSION;
300 buffer[2] = PROTOCOL_VERSION_1;
301 buffer[3] = PROTOCOL_VERSION_2;
302 buffer[4] = PROTOCOL_VERSION_3;
304 SendBufferToServer(5);
307 void SendToServer_NrWanted(int nr_wanted)
309 buffer[1] = OP_NUMBER_WANTED;
310 buffer[2] = nr_wanted;
312 SendBufferToServer(3);
315 void SendToServer_StartPlaying()
317 unsigned int new_random_seed = InitRND(level.random_seed);
319 int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */
320 /* the name of the level must be enough */
322 buffer[1] = OP_START_PLAYING;
323 buffer[2] = (byte)(level_nr >> 8);
324 buffer[3] = (byte)(level_nr & 0xff);
325 buffer[4] = (byte)(dummy >> 8);
326 buffer[5] = (byte)(dummy & 0xff);
328 buffer[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
329 buffer[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
330 buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
331 buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
333 strcpy((char *)&buffer[10], leveldir_current->identifier);
335 SendBufferToServer(10 + strlen(leveldir_current->identifier) + 1);
338 void SendToServer_PausePlaying()
340 buffer[1] = OP_PAUSE_PLAYING;
342 SendBufferToServer(2);
345 void SendToServer_ContinuePlaying()
347 buffer[1] = OP_CONTINUE_PLAYING;
349 SendBufferToServer(2);
352 void SendToServer_StopPlaying(int cause_for_stopping)
354 buffer[1] = OP_STOP_PLAYING;
355 buffer[2] = cause_for_stopping;
357 SendBufferToServer(3);
360 void SendToServer_MovePlayer(byte player_action)
362 buffer[1] = OP_MOVE_PLAYER;
363 buffer[2] = player_action;
365 SendBufferToServer(3);
368 static void Handle_OP_BAD_PROTOCOL_VERSION()
370 Error(ERR_WARN, "protocol version mismatch");
371 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
372 buffer[2], buffer[3],
373 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
376 static void Handle_OP_YOUR_NUMBER()
378 int new_client_nr = buffer[2];
379 int new_index_nr = new_client_nr - 1;
380 struct PlayerInfo *old_local_player = local_player;
381 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
383 printf("OP_YOUR_NUMBER: %d\n", buffer[0]);
384 first_player.nr = new_client_nr;
386 if (old_local_player != new_local_player)
388 /* copy existing player settings and change to new player */
390 *new_local_player = *old_local_player;
391 old_local_player->connected = FALSE;
392 local_player = new_local_player;
395 if (first_player.nr > MAX_PLAYERS)
396 Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
398 Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
401 static void Handle_OP_NUMBER_WANTED()
403 int client_nr_wanted = buffer[2];
404 int old_client_nr = buffer[0];
405 int new_client_nr = buffer[3];
406 int old_index_nr = old_client_nr - 1;
407 int new_index_nr = new_client_nr - 1;
408 int index_nr_wanted = client_nr_wanted - 1;
409 struct PlayerInfo *old_player = &stored_player[old_index_nr];
410 struct PlayerInfo *new_player = &stored_player[new_index_nr];
412 printf("OP_NUMBER_WANTED: %d\n", buffer[0]);
414 if (new_client_nr == client_nr_wanted) /* switching succeeded */
416 struct NetworkClientPlayerInfo *player;
418 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
419 Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
420 old_client_nr, new_client_nr);
421 else if (old_client_nr == first_player.nr) /* local player keeps his nr */
422 Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
424 if (old_client_nr != new_client_nr)
426 /* copy existing player settings and change to new player */
428 *new_player = *old_player;
429 old_player->connected = FALSE;
432 player = getNetworkPlayer(old_client_nr);
433 player->nr = new_client_nr;
435 if (old_player == local_player) /* local player switched */
436 local_player = new_player;
438 else if (old_client_nr == first_player.nr) /* failed -- local player? */
442 sprintf(request, "Sorry ! Player %d already exists ! You are player %d !",
443 index_nr_wanted + 1, new_index_nr + 1);
445 Request(request, REQ_CONFIRM);
447 Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d",
452 static void Handle_OP_PLAYER_NAME(unsigned int len)
454 struct NetworkClientPlayerInfo *player;
455 int player_nr = (int)buffer[0];
457 printf("OP_PLAYER_NAME: %d\n", player_nr);
458 player = getNetworkPlayer(player_nr);
460 Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"",
461 buffer[0], &buffer[2]);
462 strncpy(player->name, (char *)&buffer[2], MAX_PLAYER_NAME_LEN);
465 static void Handle_OP_PLAYER_CONNECTED()
467 struct NetworkClientPlayerInfo *player, *last_player = NULL;
468 int new_client_nr = (int)buffer[0];
469 int new_index_nr = new_client_nr - 1;
471 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
472 Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr);
474 for (player = &first_player; player; player = player->next)
476 if (player->nr == new_client_nr)
477 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
479 last_player = player;
482 last_player->next = player =
483 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
484 player->nr = new_client_nr;
485 player->name[0] = '\0';
488 stored_player[new_index_nr].connected = TRUE;
491 static void Handle_OP_PLAYER_DISCONNECTED()
493 struct NetworkClientPlayerInfo *player, *player_disconnected;
494 int player_nr = (int)buffer[0];
496 printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr);
497 player_disconnected = getNetworkPlayer(player_nr);
498 Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected",
499 player_nr, getNetworkPlayerName(buffer[0]));
501 for (player = &first_player; player; player = player->next)
502 if (player->next == player_disconnected)
503 player->next = player_disconnected->next;
504 free(player_disconnected);
507 static void Handle_OP_START_PLAYING()
509 LevelDirTree *new_leveldir;
511 unsigned int new_random_seed;
512 char *new_leveldir_identifier;
514 new_level_nr = (buffer[2] << 8) + buffer[3];
516 (buffer[6] << 24) | (buffer[7] << 16) | (buffer[8] << 8) | (buffer[9]);
517 new_leveldir_identifier = (char *)&buffer[10];
519 new_leveldir = getTreeInfoFromIdentifier(leveldir_first,
520 new_leveldir_identifier);
521 if (new_leveldir == NULL)
523 Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier);
525 new_leveldir = leveldir_first;
526 Error(ERR_WARN, "using default level set: '%s'", new_leveldir->identifier);
529 printf("OP_START_PLAYING: %d\n", buffer[0]);
530 Error(ERR_NETWORK_CLIENT,
531 "client %d starts game [level %d from level identifier '%s']\n",
532 buffer[0], new_level_nr, new_leveldir->identifier);
534 leveldir_current = new_leveldir;
535 level_nr = new_level_nr;
541 StartGameActions(FALSE, setup.autorecord, new_random_seed);
544 static void Handle_OP_PAUSE_PLAYING()
546 printf("OP_PAUSE_PLAYING: %d\n", buffer[0]);
547 Error(ERR_NETWORK_CLIENT, "client %d pauses game", buffer[0]);
550 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
553 static void Handle_OP_CONTINUE_PLAYING()
555 printf("OP_CONTINUE_PLAYING: %d\n", buffer[0]);
556 Error(ERR_NETWORK_CLIENT, "client %d continues game", buffer[0]);
558 tape.pausing = FALSE;
559 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
562 static void Handle_OP_STOP_PLAYING()
564 printf("OP_STOP_PLAYING: %d [%d]\n", buffer[0], buffer[2]);
565 Error(ERR_NETWORK_CLIENT, "client %d stops game [%d]", buffer[0], buffer[2]);
567 if (game_status == GAME_MODE_PLAYING)
569 if (buffer[2] == NETWORK_STOP_BY_PLAYER)
570 Request("Network game stopped by player!", REQ_CONFIRM);
571 else if (buffer[2] == NETWORK_STOP_BY_ERROR)
572 Request("Network game stopped due to internal error!", REQ_CONFIRM);
574 Request("Network game stopped !", REQ_CONFIRM);
577 game_status = GAME_MODE_MAIN;
581 static void Handle_OP_MOVE_PLAYER(unsigned int len)
583 int server_frame_counter;
586 if (!network_playing)
589 server_frame_counter =
590 (buffer[2] << 24) | (buffer[3] << 16) | (buffer[4] << 8) | (buffer[5]);
593 Error(ERR_NETWORK_CLIENT, "receiving server frame counter value %d [%d]",
594 server_frame_counter, FrameCounter);
597 if (server_frame_counter != FrameCounter)
599 Error(ERR_INFO, "client and servers frame counters out of sync");
600 Error(ERR_INFO, "frame counter of client is %d", FrameCounter);
601 Error(ERR_INFO, "frame counter of server is %d", server_frame_counter);
602 Error(ERR_INFO, "this should not happen -- please debug");
604 stop_network_game = TRUE;
609 /* copy valid player actions */
610 for (i = 0; i < MAX_PLAYERS; i++)
611 stored_player[i].effective_action =
612 (i < len - 6 && stored_player[i].active ? buffer[6 + i] : 0);
614 network_player_action_received = TRUE;
617 static void HandleNetworkingMessages()
619 unsigned int message_length;
621 stop_network_game = FALSE;
623 while (nread >= 4 && nread >= 4 + readbuffer[3])
625 message_length = readbuffer[3];
626 if (readbuffer[0] || readbuffer[1] || readbuffer[2])
627 Error(ERR_EXIT, "wrong network server line length");
629 memcpy(buffer, &readbuffer[4], message_length);
630 nread -= 4 + message_length;
631 memmove(readbuffer, readbuffer + 4 + message_length, nread);
635 case OP_BAD_PROTOCOL_VERSION:
636 Handle_OP_BAD_PROTOCOL_VERSION();
640 Handle_OP_YOUR_NUMBER();
643 case OP_NUMBER_WANTED:
644 Handle_OP_NUMBER_WANTED();
648 Handle_OP_PLAYER_NAME(message_length);
651 case OP_PLAYER_CONNECTED:
652 Handle_OP_PLAYER_CONNECTED();
655 case OP_PLAYER_DISCONNECTED:
656 Handle_OP_PLAYER_DISCONNECTED();
659 case OP_START_PLAYING:
660 Handle_OP_START_PLAYING();
663 case OP_PAUSE_PLAYING:
664 Handle_OP_PAUSE_PLAYING();
667 case OP_CONTINUE_PLAYING:
668 Handle_OP_CONTINUE_PLAYING();
671 case OP_STOP_PLAYING:
672 Handle_OP_STOP_PLAYING();
676 Handle_OP_MOVE_PLAYER(message_length);
679 case OP_BROADCAST_MESSAGE:
680 printf("OP_BROADCAST_MESSAGE: %d\n", buffer[0]);
681 Error(ERR_NETWORK_CLIENT, "client %d sends message", buffer[0]);
688 /* in case of internal error, stop network game */
689 if (stop_network_game)
690 SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR);
695 void HandleNetworking()
697 #if !defined(TARGET_SDL)
698 static struct timeval tv = { 0, 0 };
705 #if defined(TARGET_SDL)
706 if ((r = SDLNet_CheckSockets(rfds, 1)) < 0)
707 Error(ERR_EXIT, "HandleNetworking(): SDLNet_CheckSockets() failed");
714 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
716 if (r < 0 && errno != EINTR)
717 Error(ERR_EXIT, "HandleNetworking(): select() failed");
723 #if defined(TARGET_SDL)
726 if (FD_ISSET(sfd, &rfds))
729 #if defined(TARGET_SDL)
730 r = SDLNet_TCP_Recv(sfd, readbuffer + nread, 1);
732 r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread);
736 Error(ERR_EXIT, "error reading from network server");
739 Error(ERR_EXIT, "connection to network server lost");
743 HandleNetworkingMessages();
749 #endif /* PLATFORM_UNIX */