1 /***********************************************************
2 * Rocks'n'Diamonds -- McDuffin Strikes Back! *
3 *----------------------------------------------------------*
4 * (c) 1995-2002 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;
70 static void SendBufferToServer(int size)
75 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
76 realbuffer[3] = (byte)size;
79 if (nwrite + 4 + size >= MAX_BUFFER_SIZE)
80 Error(ERR_EXIT, "internal error: network send buffer overflow");
82 memcpy(writbuffer + nwrite, realbuffer, 4 + size);
85 /* directly send the buffer to the network server */
86 #if defined(TARGET_SDL)
87 SDLNet_TCP_Send(sfd, writbuffer, nwrite);
89 write(sfd, writbuffer, nwrite);
94 struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr)
96 struct NetworkClientPlayerInfo *player = NULL;
98 for (player = &first_player; player; player = player->next)
99 if (player->nr == player_nr)
102 if (player == NULL) /* should not happen */
103 Error(ERR_EXIT, "protocol error: reference to non-existing player %d",
109 char *getNetworkPlayerName(int player_nr)
111 struct NetworkClientPlayerInfo *player;
114 return("the network game server");
115 else if (player_nr == first_player.nr)
118 for (player = &first_player; player; player = player->next)
119 if (player->nr == player_nr && player->name && strlen(player->name))
120 return(player->name);
122 return(EMPTY_PLAYER_NAME);
125 static void StartNetworkServer(int port)
127 #if defined(TARGET_SDL)
131 server_thread = SDL_CreateThread(NetworkServerThread, &p);
132 network_server = TRUE;
139 NetworkServer(port, options.serveronly);
146 "cannot create network server process - no network playing");
147 options.network = FALSE;
151 /* we are parent process -- resume normal operation */
157 #if defined(TARGET_SDL)
158 boolean ConnectToServer(char *hostname, int port)
164 port = DEFAULT_SERVER_PORT;
166 rfds = SDLNet_AllocSocketSet(1);
170 SDLNet_ResolveHost(&ip, hostname, port);
171 if (ip.host == INADDR_NONE)
172 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
176 SDLNet_Write32(0x7f000001, &ip.host); /* 127.0.0.1 */
177 SDLNet_Write16(port, &ip.port);
180 sfd = SDLNet_TCP_Open(&ip);
184 SDLNet_TCP_AddSocket(rfds, sfd);
189 printf("SDLNet_TCP_Open(): %s\n", SDLNet_GetError());
192 if (hostname) /* connect to specified server failed */
195 printf("No rocksndiamonds server on localhost -- starting up one ...\n");
196 StartNetworkServer(port);
198 /* wait for server to start up and try connecting several times */
199 for (i = 0; i < 6; i++)
201 Delay(500); /* wait 500 ms == 0.5 seconds */
203 if ((sfd = SDLNet_TCP_Open(&ip))) /* connected */
205 SDLNet_TCP_AddSocket(rfds, sfd);
210 /* when reaching this point, connect to newly started server has failed */
216 boolean ConnectToServer(char *hostname, int port)
218 struct sockaddr_in s;
219 struct protoent *tcpproto;
224 if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1)
226 struct hostent *host;
228 if ((host = gethostbyname(hostname)) == NULL)
229 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
231 s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]);
235 s.sin_addr.s_addr = inet_addr("127.0.0.1"); /* localhost */
238 port = DEFAULT_SERVER_PORT;
240 s.sin_port = htons(port);
241 s.sin_family = AF_INET;
243 sfd = socket(PF_INET, SOCK_STREAM, 0);
245 Error(ERR_EXIT, "out of file descriptors");
247 if ((tcpproto = getprotobyname("tcp")) != NULL)
248 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
250 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */
253 if (hostname) /* connect to specified server failed */
256 printf("No rocksndiamonds server on localhost -- starting up one ...\n");
257 StartNetworkServer(port);
259 /* wait for server to start up and try connecting several times */
260 for (i = 0; i < 6; i++)
262 Delay(500); /* wait 500 ms == 0.5 seconds */
265 sfd = socket(PF_INET, SOCK_STREAM, 0);
267 Error(ERR_EXIT, "out of file descriptors");
269 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
271 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */
275 /* when reaching this point, connect to newly started server has failed */
278 #endif /* defined(TARGET_SDL) */
280 void SendToServer_PlayerName(char *player_name)
282 int len_player_name = strlen(player_name);
284 buffer[1] = OP_PLAYER_NAME;
285 memcpy(&buffer[2], player_name, len_player_name);
286 SendBufferToServer(2 + len_player_name);
287 Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
290 void SendToServer_ProtocolVersion()
292 buffer[1] = OP_PROTOCOL_VERSION;
293 buffer[2] = PROTOCOL_VERSION_1;
294 buffer[3] = PROTOCOL_VERSION_2;
295 buffer[4] = PROTOCOL_VERSION_3;
297 SendBufferToServer(5);
300 void SendToServer_NrWanted(int nr_wanted)
302 buffer[1] = OP_NUMBER_WANTED;
303 buffer[2] = nr_wanted;
305 SendBufferToServer(3);
308 void SendToServer_StartPlaying()
310 unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
312 int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */
313 /* the name of the level must be enough */
315 buffer[1] = OP_START_PLAYING;
316 buffer[2] = (byte)(level_nr >> 8);
317 buffer[3] = (byte)(level_nr & 0xff);
318 buffer[4] = (byte)(dummy >> 8);
319 buffer[5] = (byte)(dummy & 0xff);
321 buffer[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
322 buffer[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
323 buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
324 buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
326 strcpy((char *)&buffer[10], leveldir_current->identifier);
328 SendBufferToServer(10 + strlen(leveldir_current->identifier) + 1);
331 void SendToServer_PausePlaying()
333 buffer[1] = OP_PAUSE_PLAYING;
335 SendBufferToServer(2);
338 void SendToServer_ContinuePlaying()
340 buffer[1] = OP_CONTINUE_PLAYING;
342 SendBufferToServer(2);
345 void SendToServer_StopPlaying()
347 buffer[1] = OP_STOP_PLAYING;
349 SendBufferToServer(2);
352 void SendToServer_MovePlayer(byte player_action)
354 buffer[1] = OP_MOVE_PLAYER;
355 buffer[2] = player_action;
357 SendBufferToServer(3);
360 static void Handle_OP_BAD_PROTOCOL_VERSION()
362 Error(ERR_WARN, "protocol version mismatch");
363 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
364 buffer[2], buffer[3],
365 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
368 static void Handle_OP_YOUR_NUMBER()
370 int new_client_nr = buffer[2];
371 int new_index_nr = new_client_nr - 1;
372 struct PlayerInfo *old_local_player = local_player;
373 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
375 printf("OP_YOUR_NUMBER: %d\n", buffer[0]);
376 first_player.nr = new_client_nr;
378 if (old_local_player != new_local_player)
380 /* copy existing player settings and change to new player */
382 *new_local_player = *old_local_player;
383 old_local_player->connected = FALSE;
384 local_player = new_local_player;
387 if (first_player.nr > MAX_PLAYERS)
388 Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
390 Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
393 static void Handle_OP_NUMBER_WANTED()
395 int client_nr_wanted = buffer[2];
396 int old_client_nr = buffer[0];
397 int new_client_nr = buffer[3];
398 int old_index_nr = old_client_nr - 1;
399 int new_index_nr = new_client_nr - 1;
400 int index_nr_wanted = client_nr_wanted - 1;
401 struct PlayerInfo *old_player = &stored_player[old_index_nr];
402 struct PlayerInfo *new_player = &stored_player[new_index_nr];
404 printf("OP_NUMBER_WANTED: %d\n", buffer[0]);
406 if (new_client_nr == client_nr_wanted) /* switching succeeded */
408 struct NetworkClientPlayerInfo *player;
410 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
411 Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
412 old_client_nr, new_client_nr);
413 else if (old_client_nr == first_player.nr) /* local player keeps his nr */
414 Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
416 if (old_client_nr != new_client_nr)
418 /* copy existing player settings and change to new player */
420 *new_player = *old_player;
421 old_player->connected = FALSE;
424 player = getNetworkPlayer(old_client_nr);
425 player->nr = new_client_nr;
427 if (old_player == local_player) /* local player switched */
428 local_player = new_player;
430 else if (old_client_nr == first_player.nr) /* failed -- local player? */
432 char *color[] = { "yellow", "red", "green", "blue" };
435 sprintf(request, "Sorry ! %s player still exists ! You are %s player !",
436 color[index_nr_wanted], color[new_index_nr]);
437 Request(request, REQ_CONFIRM);
439 Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d",
444 static void Handle_OP_PLAYER_NAME(unsigned int len)
446 struct NetworkClientPlayerInfo *player;
447 int player_nr = (int)buffer[0];
449 printf("OP_PLAYER_NAME: %d\n", player_nr);
450 player = getNetworkPlayer(player_nr);
452 Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"",
453 buffer[0], &buffer[2]);
454 strncpy(player->name, (char *)&buffer[2], MAX_PLAYER_NAME_LEN);
457 static void Handle_OP_PLAYER_CONNECTED()
459 struct NetworkClientPlayerInfo *player, *last_player = NULL;
460 int new_client_nr = (int)buffer[0];
461 int new_index_nr = new_client_nr - 1;
463 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
464 Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr);
466 for (player = &first_player; player; player = player->next)
468 if (player->nr == new_client_nr)
469 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
471 last_player = player;
474 last_player->next = player =
475 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
476 player->nr = new_client_nr;
477 player->name[0] = '\0';
480 stored_player[new_index_nr].connected = TRUE;
483 static void Handle_OP_PLAYER_DISCONNECTED()
485 struct NetworkClientPlayerInfo *player, *player_disconnected;
486 int player_nr = (int)buffer[0];
488 printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr);
489 player_disconnected = getNetworkPlayer(player_nr);
490 Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected",
491 player_nr, getNetworkPlayerName(buffer[0]));
493 for (player = &first_player; player; player = player->next)
494 if (player->next == player_disconnected)
495 player->next = player_disconnected->next;
496 free(player_disconnected);
499 static void Handle_OP_START_PLAYING()
501 LevelDirTree *new_leveldir;
503 int dummy; /* !!! HAS NO MEANING ANYMORE !!! */
504 unsigned long new_random_seed;
505 char *new_leveldir_identifier;
507 new_level_nr = (buffer[2] << 8) + buffer[3];
508 dummy = (buffer[4] << 8) + buffer[5];
510 (buffer[6] << 24) | (buffer[7] << 16) | (buffer[8] << 8) | (buffer[9]);
511 new_leveldir_identifier = (char *)&buffer[10];
513 new_leveldir = getTreeInfoFromIdentifier(leveldir_first,
514 new_leveldir_identifier);
515 if (new_leveldir == NULL)
517 Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier);
519 new_leveldir = leveldir_first;
520 Error(ERR_WARN, "using default level set: '%s'", new_leveldir->identifier);
523 printf("OP_START_PLAYING: %d\n", buffer[0]);
524 Error(ERR_NETWORK_CLIENT,
525 "client %d starts game [level %d from level identifier '%s']\n",
526 buffer[0], new_level_nr, new_leveldir->identifier);
528 leveldir_current = new_leveldir;
529 level_nr = new_level_nr;
535 if (setup.autorecord)
536 TapeStartRecording();
539 tape.random_seed = new_random_seed;
541 InitRND(new_random_seed);
543 game_status = GAME_MODE_PLAYING;
547 static void Handle_OP_PAUSE_PLAYING()
549 printf("OP_PAUSE_PLAYING: %d\n", buffer[0]);
550 Error(ERR_NETWORK_CLIENT, "client %d pauses game", buffer[0]);
553 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
556 static void Handle_OP_CONTINUE_PLAYING()
558 printf("OP_CONTINUE_PLAYING: %d\n", buffer[0]);
559 Error(ERR_NETWORK_CLIENT, "client %d continues game", buffer[0]);
561 tape.pausing = FALSE;
562 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
565 static void Handle_OP_STOP_PLAYING()
567 printf("OP_STOP_PLAYING: %d\n", buffer[0]);
568 Error(ERR_NETWORK_CLIENT, "client %d stops game", buffer[0]);
570 game_status = GAME_MODE_MAIN;
574 static void Handle_OP_MOVE_PLAYER(unsigned int len)
576 int server_frame_counter;
579 if (!network_playing)
582 server_frame_counter =
583 (buffer[2] << 24) | (buffer[3] << 16) | (buffer[4] << 8) | (buffer[5]);
585 if (server_frame_counter != FrameCounter)
587 Error(ERR_RETURN, "client and servers frame counters out of sync");
588 Error(ERR_RETURN, "frame counter of client is %d", FrameCounter);
589 Error(ERR_RETURN, "frame counter of server is %d", server_frame_counter);
590 Error(ERR_EXIT, "this should not happen -- please debug");
593 /* copy valid player actions */
594 for (i = 0; i < MAX_PLAYERS; i++)
595 stored_player[i].effective_action =
596 (i < len - 6 && stored_player[i].active ? buffer[6 + i] : 0);
598 network_player_action_received = TRUE;
601 static void HandleNetworkingMessages()
603 unsigned int message_length;
605 while (nread >= 4 && nread >= 4 + readbuffer[3])
607 message_length = readbuffer[3];
608 if (readbuffer[0] || readbuffer[1] || readbuffer[2])
609 Error(ERR_EXIT, "wrong network server line length");
611 memcpy(buffer, &readbuffer[4], message_length);
612 nread -= 4 + message_length;
613 memmove(readbuffer, readbuffer + 4 + message_length, nread);
617 case OP_BAD_PROTOCOL_VERSION:
618 Handle_OP_BAD_PROTOCOL_VERSION();
622 Handle_OP_YOUR_NUMBER();
625 case OP_NUMBER_WANTED:
626 Handle_OP_NUMBER_WANTED();
630 Handle_OP_PLAYER_NAME(message_length);
633 case OP_PLAYER_CONNECTED:
634 Handle_OP_PLAYER_CONNECTED();
637 case OP_PLAYER_DISCONNECTED:
638 Handle_OP_PLAYER_DISCONNECTED();
641 case OP_START_PLAYING:
642 Handle_OP_START_PLAYING();
645 case OP_PAUSE_PLAYING:
646 Handle_OP_PAUSE_PLAYING();
649 case OP_CONTINUE_PLAYING:
650 Handle_OP_CONTINUE_PLAYING();
653 case OP_STOP_PLAYING:
654 Handle_OP_STOP_PLAYING();
658 Handle_OP_MOVE_PLAYER(message_length);
661 case OP_BROADCAST_MESSAGE:
662 printf("OP_BROADCAST_MESSAGE: %d\n", buffer[0]);
663 Error(ERR_NETWORK_CLIENT, "client %d sends message", buffer[0]);
673 void HandleNetworking()
675 #if !defined(TARGET_SDL)
676 static struct timeval tv = { 0, 0 };
683 #if defined(TARGET_SDL)
684 if ((r = SDLNet_CheckSockets(rfds, 1)) < 0)
685 Error(ERR_EXIT, "HandleNetworking(): SDLNet_CheckSockets() failed");
692 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
694 if (r < 0 && errno != EINTR)
695 Error(ERR_EXIT, "HandleNetworking(): select() failed");
701 #if defined(TARGET_SDL)
704 if (FD_ISSET(sfd, &rfds))
707 #if defined(TARGET_SDL)
708 r = SDLNet_TCP_Recv(sfd, readbuffer + nread, 1);
710 r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread);
714 Error(ERR_EXIT, "error reading from network server");
717 Error(ERR_EXIT, "connection to network server lost");
721 HandleNetworkingMessages();
727 #endif /* PLATFORM_UNIX */