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 server_thread = SDL_CreateThread(NetworkServerThread, &p);
134 network_server = TRUE;
141 NetworkServer(port, options.serveronly);
148 "cannot create network server process - no network playing");
149 options.network = FALSE;
153 /* we are parent process -- resume normal operation */
159 #if defined(TARGET_SDL)
160 boolean ConnectToServer(char *hostname, int port)
166 port = DEFAULT_SERVER_PORT;
168 rfds = SDLNet_AllocSocketSet(1);
172 SDLNet_ResolveHost(&ip, hostname, port);
173 if (ip.host == INADDR_NONE)
174 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
178 SDLNet_Write32(0x7f000001, &ip.host); /* 127.0.0.1 */
179 SDLNet_Write16(port, &ip.port);
182 sfd = SDLNet_TCP_Open(&ip);
186 SDLNet_TCP_AddSocket(rfds, sfd);
191 printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError());
194 if (hostname) /* connect to specified server failed */
197 printf("No rocksndiamonds server on localhost -- starting up one ...\n");
198 StartNetworkServer(port);
200 /* wait for server to start up and try connecting several times */
201 for (i = 0; i < 6; i++)
203 Delay(500); /* wait 500 ms == 0.5 seconds */
205 if ((sfd = SDLNet_TCP_Open(&ip))) /* connected */
207 SDLNet_TCP_AddSocket(rfds, sfd);
212 /* when reaching this point, connect to newly started server has failed */
218 boolean ConnectToServer(char *hostname, int port)
220 struct sockaddr_in s;
221 struct protoent *tcpproto;
226 if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1)
228 struct hostent *host;
230 if ((host = gethostbyname(hostname)) == NULL)
231 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
233 s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]);
237 s.sin_addr.s_addr = inet_addr("127.0.0.1"); /* localhost */
240 port = DEFAULT_SERVER_PORT;
242 s.sin_port = htons(port);
243 s.sin_family = AF_INET;
245 sfd = socket(PF_INET, SOCK_STREAM, 0);
247 Error(ERR_EXIT, "out of file descriptors");
249 if ((tcpproto = getprotobyname("tcp")) != NULL)
250 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
252 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */
255 if (hostname) /* connect to specified server failed */
258 printf("No rocksndiamonds server on localhost -- starting up one ...\n");
259 StartNetworkServer(port);
261 /* wait for server to start up and try connecting several times */
262 for (i = 0; i < 6; i++)
264 Delay(500); /* wait 500 ms == 0.5 seconds */
267 sfd = socket(PF_INET, SOCK_STREAM, 0);
269 Error(ERR_EXIT, "out of file descriptors");
271 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
273 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */
277 /* when reaching this point, connect to newly started server has failed */
280 #endif /* defined(TARGET_SDL) */
282 void SendToServer_PlayerName(char *player_name)
284 int len_player_name = strlen(player_name);
286 buffer[1] = OP_PLAYER_NAME;
287 memcpy(&buffer[2], player_name, len_player_name);
288 SendBufferToServer(2 + len_player_name);
289 Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
292 void SendToServer_ProtocolVersion()
294 buffer[1] = OP_PROTOCOL_VERSION;
295 buffer[2] = PROTOCOL_VERSION_1;
296 buffer[3] = PROTOCOL_VERSION_2;
297 buffer[4] = PROTOCOL_VERSION_3;
299 SendBufferToServer(5);
302 void SendToServer_NrWanted(int nr_wanted)
304 buffer[1] = OP_NUMBER_WANTED;
305 buffer[2] = nr_wanted;
307 SendBufferToServer(3);
310 void SendToServer_StartPlaying()
312 unsigned int new_random_seed = InitRND(level.random_seed);
314 int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */
315 /* the name of the level must be enough */
317 buffer[1] = OP_START_PLAYING;
318 buffer[2] = (byte)(level_nr >> 8);
319 buffer[3] = (byte)(level_nr & 0xff);
320 buffer[4] = (byte)(dummy >> 8);
321 buffer[5] = (byte)(dummy & 0xff);
323 buffer[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
324 buffer[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
325 buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
326 buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
328 strcpy((char *)&buffer[10], leveldir_current->identifier);
330 SendBufferToServer(10 + strlen(leveldir_current->identifier) + 1);
333 void SendToServer_PausePlaying()
335 buffer[1] = OP_PAUSE_PLAYING;
337 SendBufferToServer(2);
340 void SendToServer_ContinuePlaying()
342 buffer[1] = OP_CONTINUE_PLAYING;
344 SendBufferToServer(2);
347 void SendToServer_StopPlaying(int cause_for_stopping)
349 buffer[1] = OP_STOP_PLAYING;
350 buffer[2] = cause_for_stopping;
352 SendBufferToServer(3);
355 void SendToServer_MovePlayer(byte player_action)
357 buffer[1] = OP_MOVE_PLAYER;
358 buffer[2] = player_action;
360 SendBufferToServer(3);
363 static void Handle_OP_BAD_PROTOCOL_VERSION()
365 Error(ERR_WARN, "protocol version mismatch");
366 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
367 buffer[2], buffer[3],
368 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
371 static void Handle_OP_YOUR_NUMBER()
373 int new_client_nr = buffer[2];
374 int new_index_nr = new_client_nr - 1;
375 struct PlayerInfo *old_local_player = local_player;
376 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
378 printf("OP_YOUR_NUMBER: %d\n", buffer[0]);
379 first_player.nr = new_client_nr;
381 if (old_local_player != new_local_player)
383 /* copy existing player settings and change to new player */
385 *new_local_player = *old_local_player;
386 old_local_player->connected = FALSE;
387 local_player = new_local_player;
390 if (first_player.nr > MAX_PLAYERS)
391 Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
393 Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
396 static void Handle_OP_NUMBER_WANTED()
398 int client_nr_wanted = buffer[2];
399 int old_client_nr = buffer[0];
400 int new_client_nr = buffer[3];
401 int old_index_nr = old_client_nr - 1;
402 int new_index_nr = new_client_nr - 1;
403 int index_nr_wanted = client_nr_wanted - 1;
404 struct PlayerInfo *old_player = &stored_player[old_index_nr];
405 struct PlayerInfo *new_player = &stored_player[new_index_nr];
407 printf("OP_NUMBER_WANTED: %d\n", buffer[0]);
409 if (new_client_nr == client_nr_wanted) /* switching succeeded */
411 struct NetworkClientPlayerInfo *player;
413 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
414 Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
415 old_client_nr, new_client_nr);
416 else if (old_client_nr == first_player.nr) /* local player keeps his nr */
417 Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
419 if (old_client_nr != new_client_nr)
421 /* copy existing player settings and change to new player */
423 *new_player = *old_player;
424 old_player->connected = FALSE;
427 player = getNetworkPlayer(old_client_nr);
428 player->nr = new_client_nr;
430 if (old_player == local_player) /* local player switched */
431 local_player = new_player;
433 else if (old_client_nr == first_player.nr) /* failed -- local player? */
437 sprintf(request, "Sorry ! Player %d already exists ! You are player %d !",
438 index_nr_wanted + 1, new_index_nr + 1);
440 Request(request, REQ_CONFIRM);
442 Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d",
447 static void Handle_OP_PLAYER_NAME(unsigned int len)
449 struct NetworkClientPlayerInfo *player;
450 int player_nr = (int)buffer[0];
452 printf("OP_PLAYER_NAME: %d\n", player_nr);
453 player = getNetworkPlayer(player_nr);
455 Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"",
456 buffer[0], &buffer[2]);
457 strncpy(player->name, (char *)&buffer[2], MAX_PLAYER_NAME_LEN);
460 static void Handle_OP_PLAYER_CONNECTED()
462 struct NetworkClientPlayerInfo *player, *last_player = NULL;
463 int new_client_nr = (int)buffer[0];
464 int new_index_nr = new_client_nr - 1;
466 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
467 Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr);
469 for (player = &first_player; player; player = player->next)
471 if (player->nr == new_client_nr)
472 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
474 last_player = player;
477 last_player->next = player =
478 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
479 player->nr = new_client_nr;
480 player->name[0] = '\0';
483 stored_player[new_index_nr].connected = TRUE;
486 static void Handle_OP_PLAYER_DISCONNECTED()
488 struct NetworkClientPlayerInfo *player, *player_disconnected;
489 int player_nr = (int)buffer[0];
491 printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr);
492 player_disconnected = getNetworkPlayer(player_nr);
493 Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected",
494 player_nr, getNetworkPlayerName(buffer[0]));
496 for (player = &first_player; player; player = player->next)
497 if (player->next == player_disconnected)
498 player->next = player_disconnected->next;
499 free(player_disconnected);
502 static void Handle_OP_START_PLAYING()
504 LevelDirTree *new_leveldir;
506 unsigned int new_random_seed;
507 char *new_leveldir_identifier;
509 new_level_nr = (buffer[2] << 8) + buffer[3];
511 (buffer[6] << 24) | (buffer[7] << 16) | (buffer[8] << 8) | (buffer[9]);
512 new_leveldir_identifier = (char *)&buffer[10];
514 new_leveldir = getTreeInfoFromIdentifier(leveldir_first,
515 new_leveldir_identifier);
516 if (new_leveldir == NULL)
518 Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier);
520 new_leveldir = leveldir_first;
521 Error(ERR_WARN, "using default level set: '%s'", new_leveldir->identifier);
524 printf("OP_START_PLAYING: %d\n", buffer[0]);
525 Error(ERR_NETWORK_CLIENT,
526 "client %d starts game [level %d from level identifier '%s']\n",
527 buffer[0], new_level_nr, new_leveldir->identifier);
529 leveldir_current = new_leveldir;
530 level_nr = new_level_nr;
536 StartGameActions(FALSE, setup.autorecord, new_random_seed);
539 static void Handle_OP_PAUSE_PLAYING()
541 printf("OP_PAUSE_PLAYING: %d\n", buffer[0]);
542 Error(ERR_NETWORK_CLIENT, "client %d pauses game", buffer[0]);
545 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
548 static void Handle_OP_CONTINUE_PLAYING()
550 printf("OP_CONTINUE_PLAYING: %d\n", buffer[0]);
551 Error(ERR_NETWORK_CLIENT, "client %d continues game", buffer[0]);
553 tape.pausing = FALSE;
554 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
557 static void Handle_OP_STOP_PLAYING()
559 printf("OP_STOP_PLAYING: %d [%d]\n", buffer[0], buffer[2]);
560 Error(ERR_NETWORK_CLIENT, "client %d stops game [%d]", buffer[0], buffer[2]);
562 if (game_status == GAME_MODE_PLAYING)
564 if (buffer[2] == NETWORK_STOP_BY_PLAYER)
565 Request("Network game stopped by player!", REQ_CONFIRM);
566 else if (buffer[2] == NETWORK_STOP_BY_ERROR)
567 Request("Network game stopped due to internal error!", REQ_CONFIRM);
569 Request("Network game stopped !", REQ_CONFIRM);
572 game_status = GAME_MODE_MAIN;
576 static void Handle_OP_MOVE_PLAYER(unsigned int len)
578 int server_frame_counter;
581 if (!network_playing)
584 server_frame_counter =
585 (buffer[2] << 24) | (buffer[3] << 16) | (buffer[4] << 8) | (buffer[5]);
588 Error(ERR_NETWORK_CLIENT, "receiving server frame counter value %d [%d]",
589 server_frame_counter, FrameCounter);
592 if (server_frame_counter != FrameCounter)
594 Error(ERR_INFO, "client and servers frame counters out of sync");
595 Error(ERR_INFO, "frame counter of client is %d", FrameCounter);
596 Error(ERR_INFO, "frame counter of server is %d", server_frame_counter);
597 Error(ERR_INFO, "this should not happen -- please debug");
599 stop_network_game = TRUE;
604 /* copy valid player actions */
605 for (i = 0; i < MAX_PLAYERS; i++)
606 stored_player[i].effective_action =
607 (i < len - 6 && stored_player[i].active ? buffer[6 + i] : 0);
609 network_player_action_received = TRUE;
612 static void HandleNetworkingMessages()
614 unsigned int message_length;
616 stop_network_game = FALSE;
618 while (nread >= 4 && nread >= 4 + readbuffer[3])
620 message_length = readbuffer[3];
621 if (readbuffer[0] || readbuffer[1] || readbuffer[2])
622 Error(ERR_EXIT, "wrong network server line length");
624 memcpy(buffer, &readbuffer[4], message_length);
625 nread -= 4 + message_length;
626 memmove(readbuffer, readbuffer + 4 + message_length, nread);
630 case OP_BAD_PROTOCOL_VERSION:
631 Handle_OP_BAD_PROTOCOL_VERSION();
635 Handle_OP_YOUR_NUMBER();
638 case OP_NUMBER_WANTED:
639 Handle_OP_NUMBER_WANTED();
643 Handle_OP_PLAYER_NAME(message_length);
646 case OP_PLAYER_CONNECTED:
647 Handle_OP_PLAYER_CONNECTED();
650 case OP_PLAYER_DISCONNECTED:
651 Handle_OP_PLAYER_DISCONNECTED();
654 case OP_START_PLAYING:
655 Handle_OP_START_PLAYING();
658 case OP_PAUSE_PLAYING:
659 Handle_OP_PAUSE_PLAYING();
662 case OP_CONTINUE_PLAYING:
663 Handle_OP_CONTINUE_PLAYING();
666 case OP_STOP_PLAYING:
667 Handle_OP_STOP_PLAYING();
671 Handle_OP_MOVE_PLAYER(message_length);
674 case OP_BROADCAST_MESSAGE:
675 printf("OP_BROADCAST_MESSAGE: %d\n", buffer[0]);
676 Error(ERR_NETWORK_CLIENT, "client %d sends message", buffer[0]);
683 /* in case of internal error, stop network game */
684 if (stop_network_game)
685 SendToServer_StopPlaying(NETWORK_STOP_BY_ERROR);
690 void HandleNetworking()
692 #if !defined(TARGET_SDL)
693 static struct timeval tv = { 0, 0 };
700 #if defined(TARGET_SDL)
701 if ((r = SDLNet_CheckSockets(rfds, 1)) < 0)
702 Error(ERR_EXIT, "HandleNetworking(): SDLNet_CheckSockets() failed");
709 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
711 if (r < 0 && errno != EINTR)
712 Error(ERR_EXIT, "HandleNetworking(): select() failed");
718 #if defined(TARGET_SDL)
721 if (FD_ISSET(sfd, &rfds))
724 #if defined(TARGET_SDL)
725 r = SDLNet_TCP_Recv(sfd, readbuffer + nread, 1);
727 r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread);
731 Error(ERR_EXIT, "error reading from network server");
734 Error(ERR_EXIT, "connection to network server lost");
738 HandleNetworkingMessages();
744 #endif /* PLATFORM_UNIX */