1 /***********************************************************
2 * Rocks'n'Diamonds -- McDuffin Strikes Back! *
3 *----------------------------------------------------------*
4 * (c) 1995-98 Artsoft Entertainment *
8 * phone: ++49 +521 290471 *
9 * email: aeglos@valinor.owl.de *
10 *----------------------------------------------------------*
12 ***********************************************************/
19 #include <sys/socket.h>
20 #include <netinet/in.h>
21 #include <netinet/tcp.h>
22 #include <arpa/inet.h>
35 struct NetworkClientPlayerInfo
38 char name[MAX_PLAYER_NAME_LEN + 1];
39 struct NetworkClientPlayerInfo *next;
42 static struct NetworkClientPlayerInfo first_player =
52 static byte realbuffer[512];
53 static byte readbuffer[MAX_BUFFER_SIZE], writbuffer[MAX_BUFFER_SIZE];
54 static byte *buffer = realbuffer + 4;
55 static int nread = 0, nwrite = 0;
57 static void SendBufferToServer(int size)
62 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
63 realbuffer[3] = (byte)size;
66 if (nwrite + 4 + size >= MAX_BUFFER_SIZE)
67 Error(ERR_EXIT, "internal error: network send buffer overflow");
69 memcpy(writbuffer + nwrite, realbuffer, 4 + size);
72 /* directly send the buffer to the network server */
73 write(sfd, writbuffer, nwrite);
77 struct NetworkClientPlayerInfo *getNetworkPlayer(int player_nr)
79 struct NetworkClientPlayerInfo *player = NULL;
81 for (player = &first_player; player; player = player->next)
82 if (player->nr == player_nr)
85 if (player == NULL) /* should not happen */
86 Error(ERR_EXIT, "protocol error: reference to non-existing player %d",
92 char *getNetworkPlayerName(int player_nr)
94 struct NetworkClientPlayerInfo *player;
97 return("the network game server");
98 else if (player_nr == first_player.nr)
101 for (player=&first_player; player; player=player->next)
102 if (player->nr == player_nr && player->name && strlen(player->name))
103 return(player->name);
105 return(EMPTY_PLAYER_NAME);
108 static void StartNetworkServer(int port)
113 NetworkServer(port, options.serveronly);
120 "cannot create network server process - no network playing");
121 options.network = FALSE;
125 /* we are parent process -- resume normal operation */
130 boolean ConnectToServer(char *hostname, int port)
132 struct sockaddr_in s;
133 struct protoent *tcpproto;
138 if ((s.sin_addr.s_addr = inet_addr(hostname)) == -1)
140 struct hostent *host;
142 if ((host = gethostbyname(hostname)) == NULL)
143 Error(ERR_EXIT, "cannot locate host '%s'", hostname);
145 s.sin_addr = *(struct in_addr *)(host->h_addr_list[0]);
149 s.sin_addr.s_addr = inet_addr("127.0.0.1"); /* localhost */
152 port = DEFAULT_SERVER_PORT;
154 s.sin_port = htons(port);
155 s.sin_family = AF_INET;
157 sfd = socket(PF_INET, SOCK_STREAM, 0);
159 Error(ERR_EXIT, "out of file descriptors");
161 if ((tcpproto = getprotobyname("tcp")) != NULL)
162 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
164 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) == 0) /* connected */
167 if (hostname) /* connect to specified server failed */
170 printf("No rocksndiamonds server on localhost - starting up one ...\n");
171 StartNetworkServer(port);
173 /* wait for server to start up and try connecting several times */
176 Delay(500); /* wait 500 ms == 0.5 seconds */
179 sfd = socket(PF_INET, SOCK_STREAM, 0);
181 Error(ERR_EXIT, "out of file descriptors");
183 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
185 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */
189 /* when reaching this point, connect to newly started server has failed */
193 void SendToServer_PlayerName(char *player_name)
195 int len_player_name = strlen(player_name);
197 buffer[1] = OP_PLAYER_NAME;
198 memcpy(&buffer[2], player_name, len_player_name);
199 SendBufferToServer(2 + len_player_name);
200 Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
203 void SendToServer_ProtocolVersion()
205 buffer[1] = OP_PROTOCOL_VERSION;
206 buffer[2] = PROTOCOL_VERSION_1;
207 buffer[3] = PROTOCOL_VERSION_2;
208 buffer[4] = PROTOCOL_VERSION_3;
210 SendBufferToServer(5);
213 void SendToServer_NrWanted(int nr_wanted)
215 buffer[1] = OP_NUMBER_WANTED;
216 buffer[2] = nr_wanted;
218 SendBufferToServer(3);
221 void SendToServer_StartPlaying()
223 unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
225 int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */
226 /* the name of the level must be enough */
228 buffer[1] = OP_START_PLAYING;
229 buffer[2] = (byte)(level_nr >> 8);
230 buffer[3] = (byte)(level_nr & 0xff);
231 buffer[4] = (byte)(dummy >> 8);
232 buffer[5] = (byte)(dummy & 0xff);
234 buffer[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
235 buffer[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
236 buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
237 buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
239 strcpy((char *)&buffer[10], leveldir_current->name);
241 SendBufferToServer(10 + strlen(leveldir_current->name) + 1);
244 void SendToServer_PausePlaying()
246 buffer[1] = OP_PAUSE_PLAYING;
248 SendBufferToServer(2);
251 void SendToServer_ContinuePlaying()
253 buffer[1] = OP_CONTINUE_PLAYING;
255 SendBufferToServer(2);
258 void SendToServer_StopPlaying()
260 buffer[1] = OP_STOP_PLAYING;
262 SendBufferToServer(2);
265 void SendToServer_MovePlayer(byte player_action)
267 buffer[1] = OP_MOVE_FIGURE;
268 buffer[2] = player_action;
270 SendBufferToServer(3);
273 static void Handle_OP_BAD_PROTOCOL_VERSION()
275 Error(ERR_WARN, "protocol version mismatch");
276 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
277 buffer[2], buffer[3],
278 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
281 static void Handle_OP_YOUR_NUMBER()
283 int new_client_nr = buffer[2];
284 int new_index_nr = new_client_nr - 1;
285 struct PlayerInfo *old_local_player = local_player;
286 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
288 printf("OP_YOUR_NUMBER: %d\n", buffer[0]);
289 first_player.nr = new_client_nr;
291 if (old_local_player != new_local_player)
293 /* copy existing player settings and change to new player */
295 *new_local_player = *old_local_player;
296 old_local_player->connected = FALSE;
297 local_player = new_local_player;
300 if (first_player.nr > MAX_PLAYERS)
301 Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS);
303 Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
306 static void Handle_OP_NUMBER_WANTED()
308 int client_nr_wanted = buffer[2];
309 int old_client_nr = buffer[0];
310 int new_client_nr = buffer[3];
311 int old_index_nr = old_client_nr - 1;
312 int new_index_nr = new_client_nr - 1;
313 int index_nr_wanted = client_nr_wanted - 1;
314 struct PlayerInfo *old_player = &stored_player[old_index_nr];
315 struct PlayerInfo *new_player = &stored_player[new_index_nr];
317 printf("OP_NUMBER_WANTED: %d\n", buffer[0]);
319 if (new_client_nr == client_nr_wanted) /* switching succeeded */
321 struct NetworkClientPlayerInfo *player;
323 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
324 Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
325 old_client_nr, new_client_nr);
326 else if (old_client_nr == first_player.nr) /* local player keeps his nr */
327 Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
329 if (old_client_nr != new_client_nr)
331 /* copy existing player settings and change to new player */
333 *new_player = *old_player;
334 old_player->connected = FALSE;
337 player = getNetworkPlayer(old_client_nr);
338 player->nr = new_client_nr;
340 if (old_player == local_player) /* local player switched */
341 local_player = new_player;
343 else if (old_client_nr == first_player.nr) /* failed -- local player? */
345 char *color[] = { "yellow", "red", "green", "blue" };
348 sprintf(request, "Sorry ! %s player still exists ! You are %s player !",
349 color[index_nr_wanted], color[new_index_nr]);
350 Request(request, REQ_CONFIRM);
352 Error(ERR_NETWORK_CLIENT, "cannot switch -- you keep client # %d",
357 static void Handle_OP_PLAYER_NAME(unsigned int len)
359 struct NetworkClientPlayerInfo *player;
360 int player_nr = (int)buffer[0];
362 printf("OP_PLAYER_NAME: %d\n", player_nr);
363 player = getNetworkPlayer(player_nr);
365 Error(ERR_NETWORK_CLIENT, "client %d calls itself \"%s\"",
366 buffer[0], &buffer[2]);
367 strncpy(player->name, (char *)&buffer[2], MAX_PLAYER_NAME_LEN);
370 static void Handle_OP_PLAYER_CONNECTED()
372 struct NetworkClientPlayerInfo *player, *last_player = NULL;
373 int new_client_nr = (int)buffer[0];
374 int new_index_nr = new_client_nr - 1;
376 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
377 Error(ERR_NETWORK_CLIENT, "new client %d connected", new_client_nr);
379 for (player=&first_player; player; player=player->next)
381 if (player->nr == new_client_nr)
382 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
384 last_player = player;
387 last_player->next = player =
388 checked_malloc(sizeof(struct NetworkClientPlayerInfo));
389 player->nr = new_client_nr;
390 player->name[0] = '\0';
393 stored_player[new_index_nr].connected = TRUE;
396 static void Handle_OP_PLAYER_DISCONNECTED()
398 struct NetworkClientPlayerInfo *player, *player_disconnected;
399 int player_nr = (int)buffer[0];
401 printf("OP_PLAYER_DISCONNECTED: %d\n", player_nr);
402 player_disconnected = getNetworkPlayer(player_nr);
403 Error(ERR_NETWORK_CLIENT, "client %d (%s) disconnected",
404 player_nr, getNetworkPlayerName(buffer[0]));
406 for (player=&first_player; player; player=player->next)
407 if (player->next == player_disconnected)
408 player->next = player_disconnected->next;
409 free(player_disconnected);
412 static void Handle_OP_START_PLAYING()
414 struct LevelDirInfo *new_leveldir;
416 int dummy; /* !!! HAS NO MEANING ANYMORE !!! */
417 unsigned long new_random_seed;
418 char *new_leveldir_name;
420 new_level_nr = (buffer[2] << 8) + buffer[3];
421 dummy = (buffer[4] << 8) + buffer[5];
423 (buffer[6] << 24) | (buffer[7] << 16) | (buffer[8] << 8) | (buffer[9]);
424 new_leveldir_name = (char *)&buffer[10];
426 new_leveldir = getLevelDirInfoFromFilename(new_leveldir_name);
427 if (new_leveldir == NULL)
429 Error(ERR_WARN, "no such level directory: '%s'", new_leveldir_name);
431 new_leveldir = leveldir_first;
432 Error(ERR_WARN, "using default level directory: '%s'", new_leveldir->name);
435 printf("OP_START_PLAYING: %d\n", buffer[0]);
436 Error(ERR_NETWORK_CLIENT,
437 "client %d starts game [level %d from leveldir '%s']\n",
438 buffer[0], new_level_nr, new_leveldir->name);
440 leveldir_current = new_leveldir;
441 level_nr = new_level_nr;
447 if (setup.autorecord)
448 TapeStartRecording();
451 tape.random_seed = new_random_seed;
453 InitRND(new_random_seed);
455 game_status = PLAYING;
459 static void Handle_OP_PAUSE_PLAYING()
461 printf("OP_PAUSE_PLAYING: %d\n", buffer[0]);
462 Error(ERR_NETWORK_CLIENT, "client %d pauses game", buffer[0]);
465 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
468 static void Handle_OP_CONTINUE_PLAYING()
470 printf("OP_CONTINUE_PLAYING: %d\n", buffer[0]);
471 Error(ERR_NETWORK_CLIENT, "client %d continues game", buffer[0]);
473 tape.pausing = FALSE;
474 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
477 static void Handle_OP_STOP_PLAYING()
479 printf("OP_STOP_PLAYING: %d\n", buffer[0]);
480 Error(ERR_NETWORK_CLIENT, "client %d stops game", buffer[0]);
482 game_status = MAINMENU;
486 static void Handle_OP_MOVE_FIGURE(unsigned int len)
488 int server_frame_counter;
491 if (!network_playing)
494 server_frame_counter =
495 (buffer[2] << 24) | (buffer[3] << 16) | (buffer[4] << 8) | (buffer[5]);
497 if (server_frame_counter != FrameCounter)
499 Error(ERR_RETURN, "client and servers frame counters out of sync");
500 Error(ERR_RETURN, "frame counter of client is %d", FrameCounter);
501 Error(ERR_RETURN, "frame counter of server is %d", server_frame_counter);
502 Error(ERR_EXIT, "this should not happen -- please debug");
505 /* copy valid player actions */
506 for (i=0; i<MAX_PLAYERS; i++)
507 stored_player[i].effective_action =
508 (i < len - 6 && stored_player[i].active ? buffer[6 + i] : 0);
510 network_player_action_received = TRUE;
513 static void HandleNetworkingMessages()
515 unsigned int message_length;
517 while (nread >= 4 && nread >= 4 + readbuffer[3])
519 message_length = readbuffer[3];
520 if (readbuffer[0] || readbuffer[1] || readbuffer[2])
521 Error(ERR_EXIT, "wrong network server line length");
523 memcpy(buffer, &readbuffer[4], message_length);
524 nread -= 4 + message_length;
525 memmove(readbuffer, readbuffer + 4 + message_length, nread);
529 case OP_BAD_PROTOCOL_VERSION:
530 Handle_OP_BAD_PROTOCOL_VERSION();
534 Handle_OP_YOUR_NUMBER();
537 case OP_NUMBER_WANTED:
538 Handle_OP_NUMBER_WANTED();
542 Handle_OP_PLAYER_NAME(message_length);
545 case OP_PLAYER_CONNECTED:
546 Handle_OP_PLAYER_CONNECTED();
549 case OP_PLAYER_DISCONNECTED:
550 Handle_OP_PLAYER_DISCONNECTED();
553 case OP_START_PLAYING:
554 Handle_OP_START_PLAYING();
557 case OP_PAUSE_PLAYING:
558 Handle_OP_PAUSE_PLAYING();
561 case OP_CONTINUE_PLAYING:
562 Handle_OP_CONTINUE_PLAYING();
565 case OP_STOP_PLAYING:
566 Handle_OP_STOP_PLAYING();
570 Handle_OP_MOVE_FIGURE(message_length);
573 case OP_BROADCAST_MESSAGE:
574 printf("OP_BROADCAST_MESSAGE: %d\n", buffer[0]);
575 Error(ERR_NETWORK_CLIENT, "client %d sends message", buffer[0]);
583 void HandleNetworking()
585 static struct timeval tv = { 0, 0 };
592 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
594 if (r < 0 && errno != EINTR)
595 Error(ERR_EXIT, "HandleNetworking(): select() failed");
600 if (FD_ISSET(sfd, &rfds))
604 r = read(sfd, readbuffer + nread, MAX_BUFFER_SIZE - nread);
607 Error(ERR_EXIT, "error reading from network server");
610 Error(ERR_EXIT, "connection to network server lost");
614 HandleNetworkingMessages();