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(PLATFORM_UNIX)
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <netinet/tcp.h>
24 #include <arpa/inet.h>
27 #include "libgame/libgame.h"
37 struct NetworkClientPlayerInfo
40 char name[MAX_PLAYER_NAME_LEN + 1];
41 struct NetworkClientPlayerInfo *next;
44 static struct NetworkClientPlayerInfo first_player =
54 static byte realbuffer[512];
55 static byte readbuffer[MAX_BUFFER_SIZE], writbuffer[MAX_BUFFER_SIZE];
56 static byte *buffer = realbuffer + 4;
57 static int nread = 0, nwrite = 0;
59 static void SendBufferToServer(int size)
64 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
65 realbuffer[3] = (byte)size;
68 if (nwrite + 4 + size >= MAX_BUFFER_SIZE)
69 Error(ERR_EXIT, "internal error: network send buffer overflow");
71 memcpy(writbuffer + nwrite, realbuffer, 4 + size);
74 /* directly send the buffer to the network server */
75 write(sfd, writbuffer, nwrite);
79 struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr)
81 struct NetworkClientPlayerInfo *player = NULL;
83 for (player = &first_player; player; player = player->next)
84 if (player->nr == player_nr)
87 if (player == NULL) /* should not happen */
88 Error(ERR_EXIT, "protocol error: reference to non-existing player %d",
94 char *getNetworkPlayerName(int player_nr)
96 struct NetworkClientPlayerInfo *player;
99 return("the network game server");
100 else if (player_nr == first_player.nr)
103 for (player=&first_player; player; player=player->next)
104 if (player->nr == player_nr && player->name && strlen(player->name))
105 return(player->name);
107 return(EMPTY_PLAYER_NAME);
110 static void StartNetworkServer(int port)
115 NetworkServer(port, options.serveronly);
122 "cannot create network server process - no network playing");
123 options.network = FALSE;
127 /* we are parent process -- resume normal operation */
132 boolean ConnectToServer(char *hostname, int port)
134 struct sockaddr_in s;
135 struct protoent *tcpproto;
140 if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1)
142 struct hostent *host;
144 if ((host = gethostbyname(hostname)) == NULL)
145 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
147 s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]);
151 s.sin_addr.s_addr = inet_addr("127.0.0.1"); /* localhost */
154 port = DEFAULT_SERVER_PORT;
156 s.sin_port = htons(port);
157 s.sin_family = AF_INET;
159 sfd = socket(PF_INET, SOCK_STREAM, 0);
161 Error(ERR_EXIT, "out of file descriptors");
163 if ((tcpproto = getprotobyname("tcp")) != NULL)
164 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
166 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */
169 if (hostname) /* connect to specified server failed */
172 printf("No rocksndiamonds server on localhost - starting up one ...\n");
173 StartNetworkServer(port);
175 /* wait for server to start up and try connecting several times */
178 Delay(500); /* wait 500 ms == 0.5 seconds */
181 sfd = socket(PF_INET, SOCK_STREAM, 0);
183 Error(ERR_EXIT, "out of file descriptors");
185 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
187 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */
191 /* when reaching this point, connect to newly started server has failed */
195 void SendToServer_PlayerName(char *player_name)
197 int len_player_name = strlen(player_name);
199 buffer[1] = OP_PLAYER_NAME;
200 memcpy(&buffer[2], player_name, len_player_name);
201 SendBufferToServer(2 + len_player_name);
202 Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
205 void SendToServer_ProtocolVersion()
207 buffer[1] = OP_PROTOCOL_VERSION;
208 buffer[2] = PROTOCOL_VERSION_1;
209 buffer[3] = PROTOCOL_VERSION_2;
210 buffer[4] = PROTOCOL_VERSION_3;
212 SendBufferToServer(5);
215 void SendToServer_NrWanted(int nr_wanted)
217 buffer[1] = OP_NUMBER_WANTED;
218 buffer[2] = nr_wanted;
220 SendBufferToServer(3);
223 void SendToServer_StartPlaying()
225 unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
227 int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */
228 /* the name of the level must be enough */
230 buffer[1] = OP_START_PLAYING;
231 buffer[2] = (byte)(level_nr >> 8);
232 buffer[3] = (byte)(level_nr & 0xff);
233 buffer[4] = (byte)(dummy >> 8);
234 buffer[5] = (byte)(dummy & 0xff);
236 buffer[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
237 buffer[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
238 buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
239 buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
241 strcpy((char *)&buffer[10], leveldir_current->identifier);
243 SendBufferToServer(10 + strlen(leveldir_current->identifier) + 1);
246 void SendToServer_PausePlaying()
248 buffer[1] = OP_PAUSE_PLAYING;
250 SendBufferToServer(2);
253 void SendToServer_ContinuePlaying()
255 buffer[1] = OP_CONTINUE_PLAYING;
257 SendBufferToServer(2);
260 void SendToServer_StopPlaying()
262 buffer[1] = OP_STOP_PLAYING;
264 SendBufferToServer(2);
267 void SendToServer_MovePlayer(byte player_action)
269 buffer[1] = OP_MOVE_FIGURE;
270 buffer[2] = player_action;
272 SendBufferToServer(3);
275 static void Handle_OP_BAD_PROTOCOL_VERSION()
277 Error(ERR_WARN, "protocol version mismatch");
278 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
279 buffer[2], buffer[3],
280 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
283 static void Handle_OP_YOUR_NUMBER()
285 int new_client_nr = buffer[2];
286 int new_index_nr = new_client_nr - 1;
287 struct PlayerInfo *old_local_player = local_player;
288 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
290 printf("OP_YOUR_NUMBER: %d\n", buffer[0]);
291 first_player.nr = new_client_nr;
293 if (old_local_player != new_local_player)
295 /* copy existing player settings and change to new player */
297 *new_local_player = *old_local_player;
298 old_local_player->connected = FALSE;
299 local_player = new_local_player;
302 if (first_player.nr > MAX_PLAYERS)
303 Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS);
305 Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
308 static void Handle_OP_NUMBER_WANTED()
310 int client_nr_wanted = buffer[2];
311 int old_client_nr = buffer[0];
312 int new_client_nr = buffer[3];
313 int old_index_nr = old_client_nr - 1;
314 int new_index_nr = new_client_nr - 1;
315 int index_nr_wanted = client_nr_wanted - 1;
316 struct PlayerInfo *old_player = &stored_player[old_index_nr];
317 struct PlayerInfo *new_player = &stored_player[new_index_nr];
319 printf("OP_NUMBER_WANTED: %d\n", buffer[0]);
321 if (new_client_nr == client_nr_wanted) /* switching succeeded */
323 struct NetworkClientPlayerInfo *player;
325 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
326 Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
327 old_client_nr, new_client_nr);
328 else if (old_client_nr == first_player.nr) /* local player keeps his nr */
329 Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
331 if (old_client_nr != new_client_nr)
333 /* copy existing player settings and change to new player */
335 *new_player = *old_player;
336 old_player->connected = FALSE;
339 player = getNetworkPlayer(old_client_nr);
340 player->nr = new_client_nr;
342 if (old_player == local_player) /* local player switched */
343 local_player = new_player;
345 else if (old_client_nr == first_player.nr) /* failed -- local player? */
347 char *color[] = { "yellow", "red", "green", "blue" };
350 sprintf(request, "Sorry ! %s player still exists ! You are %s player !",
351 color[index_nr_wanted], color[new_index_nr]);
352 Request(request, REQ_CONFIRM);
354 Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d",
359 static void Handle_OP_PLAYER_NAME(unsigned int len)
361 struct NetworkClientPlayerInfo *player;
362 int player_nr = (int)buffer[0];
364 printf("OP_PLAYER_NAME: %d\n", player_nr);
365 player = getNetworkPlayer(player_nr);
367 Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"",
368 buffer[0], &buffer[2]);
369 strncpy(player->name, (char *)&buffer[2], MAX_PLAYER_NAME_LEN);
372 static void Handle_OP_PLAYER_CONNECTED()
374 struct NetworkClientPlayerInfo *player, *last_player = NULL;
375 int new_client_nr = (int)buffer[0];
376 int new_index_nr = new_client_nr - 1;
378 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
379 Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr);
381 for (player=&first_player; player; player=player->next)
383 if (player->nr == new_client_nr)
384 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
386 last_player = player;
389 last_player->next = player =
390 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
391 player->nr = new_client_nr;
392 player->name[0] = '\0';
395 stored_player[new_index_nr].connected = TRUE;
398 static void Handle_OP_PLAYER_DISCONNECTED()
400 struct NetworkClientPlayerInfo *player, *player_disconnected;
401 int player_nr = (int)buffer[0];
403 printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr);
404 player_disconnected = getNetworkPlayer(player_nr);
405 Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected",
406 player_nr, getNetworkPlayerName(buffer[0]));
408 for (player=&first_player; player; player=player->next)
409 if (player->next == player_disconnected)
410 player->next = player_disconnected->next;
411 free(player_disconnected);
414 static void Handle_OP_START_PLAYING()
416 LevelDirTree *new_leveldir;
418 int dummy; /* !!! HAS NO MEANING ANYMORE !!! */
419 unsigned long new_random_seed;
420 char *new_leveldir_identifier;
422 new_level_nr = (buffer[2] << 8) + buffer[3];
423 dummy = (buffer[4] << 8) + buffer[5];
425 (buffer[6] << 24) | (buffer[7] << 16) | (buffer[8] << 8) | (buffer[9]);
426 new_leveldir_identifier = (char *)&buffer[10];
428 new_leveldir = getTreeInfoFromIdentifier(leveldir_first,
429 new_leveldir_identifier);
430 if (new_leveldir == NULL)
432 Error(ERR_WARN, "no such level identifier: '%s'", new_leveldir_identifier);
434 new_leveldir = leveldir_first;
435 Error(ERR_WARN, "using default level set: '%s'", new_leveldir->identifier);
438 printf("OP_START_PLAYING: %d\n", buffer[0]);
439 Error(ERR_NETWORK_CLIENT,
440 "client %d starts game [level %d from level identifier '%s']\n",
441 buffer[0], new_level_nr, new_leveldir->identifier);
443 leveldir_current = new_leveldir;
444 level_nr = new_level_nr;
450 if (setup.autorecord)
451 TapeStartRecording();
454 tape.random_seed = new_random_seed;
456 InitRND(new_random_seed);
458 game_status = GAME_MODE_PLAYING;
462 static void Handle_OP_PAUSE_PLAYING()
464 printf("OP_PAUSE_PLAYING: %d\n", buffer[0]);
465 Error(ERR_NETWORK_CLIENT, "client %d pauses game", buffer[0]);
468 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
471 static void Handle_OP_CONTINUE_PLAYING()
473 printf("OP_CONTINUE_PLAYING: %d\n", buffer[0]);
474 Error(ERR_NETWORK_CLIENT, "client %d continues game", buffer[0]);
476 tape.pausing = FALSE;
477 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
480 static void Handle_OP_STOP_PLAYING()
482 printf("OP_STOP_PLAYING: %d\n", buffer[0]);
483 Error(ERR_NETWORK_CLIENT, "client %d stops game", buffer[0]);
485 game_status = GAME_MODE_MAIN;
489 static void Handle_OP_MOVE_FIGURE(unsigned int len)
491 int server_frame_counter;
494 if (!network_playing)
497 server_frame_counter =
498 (buffer[2] << 24) | (buffer[3] << 16) | (buffer[4] << 8) | (buffer[5]);
500 if (server_frame_counter != FrameCounter)
502 Error(ERR_RETURN, "client and servers frame counters out of sync");
503 Error(ERR_RETURN, "frame counter of client is %d", FrameCounter);
504 Error(ERR_RETURN, "frame counter of server is %d", server_frame_counter);
505 Error(ERR_EXIT, "this should not happen -- please debug");
508 /* copy valid player actions */
509 for (i=0; i<MAX_PLAYERS; i++)
510 stored_player[i].effective_action =
511 (i < len - 6 && stored_player[i].active ? buffer[6 + i] : 0);
513 network_player_action_received = TRUE;
516 static void HandleNetworkingMessages()
518 unsigned int message_length;
520 while (nread >= 4 && nread >= 4 + readbuffer[3])
522 message_length = readbuffer[3];
523 if (readbuffer[0] || readbuffer[1] || readbuffer[2])
524 Error(ERR_EXIT, "wrong network server line length");
526 memcpy(buffer, &readbuffer[4], message_length);
527 nread -= 4 + message_length;
528 memmove(readbuffer, readbuffer + 4 + message_length, nread);
532 case OP_BAD_PROTOCOL_VERSION:
533 Handle_OP_BAD_PROTOCOL_VERSION();
537 Handle_OP_YOUR_NUMBER();
540 case OP_NUMBER_WANTED:
541 Handle_OP_NUMBER_WANTED();
545 Handle_OP_PLAYER_NAME(message_length);
548 case OP_PLAYER_CONNECTED:
549 Handle_OP_PLAYER_CONNECTED();
552 case OP_PLAYER_DISCONNECTED:
553 Handle_OP_PLAYER_DISCONNECTED();
556 case OP_START_PLAYING:
557 Handle_OP_START_PLAYING();
560 case OP_PAUSE_PLAYING:
561 Handle_OP_PAUSE_PLAYING();
564 case OP_CONTINUE_PLAYING:
565 Handle_OP_CONTINUE_PLAYING();
568 case OP_STOP_PLAYING:
569 Handle_OP_STOP_PLAYING();
573 Handle_OP_MOVE_FIGURE(message_length);
576 case OP_BROADCAST_MESSAGE:
577 printf("OP_BROADCAST_MESSAGE: %d\n", buffer[0]);
578 Error(ERR_NETWORK_CLIENT, "client %d sends message", buffer[0]);
586 void HandleNetworking()
588 static struct timeval tv = { 0, 0 };
595 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
597 if (r < 0 && errno != EINTR)
598 Error(ERR_EXIT, "HandleNetworking(): select() failed");
603 if (FD_ISSET(sfd, &rfds))
607 r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread);
610 Error(ERR_EXIT, "error reading from network server");
613 Error(ERR_EXIT, "connection to network server lost");
617 HandleNetworkingMessages();
621 #endif /* PLATFORM_UNIX */