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 ***********************************************************/
18 #include <sys/types.h>
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <netinet/tcp.h>
24 #include <arpa/inet.h>
43 char name[MAXNICKLEN+2];
54 static char msgbuf[300];
59 unsigned char realbuf[512], readbuf[MAX_BUFFER_SIZE], writbuf[MAX_BUFFER_SIZE];
60 unsigned char *buf = realbuf + 4;
61 int nread = 0, nwrite = 0;
63 static void sysmsg(char *s)
72 static void u_sleep(int i)
75 tm.tv_sec = i / 1000000;
76 tm.tv_usec = i % 1000000;
77 select(0, NULL, NULL, NULL, &tm);
80 static void flushbuf()
84 write(sfd, writbuf, nwrite);
89 static void sendbuf(int len)
93 realbuf[0] = realbuf[1] = realbuf[2] = 0;
94 realbuf[3] = (unsigned char)len;
96 if (nwrite + 4 + len >= MAX_BUFFER_SIZE)
97 Error(ERR_EXIT, "internal error: network send buffer overflow");
98 memcpy(writbuf + nwrite, realbuf, 4 + len);
108 struct user *finduser(unsigned char c)
112 for (u = &me; u; u = u->next)
116 Error(ERR_EXIT, "protocol error: reference to non-existing user %d", c);
118 return NULL; /* so that gcc -Wall doesn't complain */
121 char *get_user_name(unsigned char c)
126 return("the server");
130 for (u = &me; u; u = u->next)
131 if (u->nr == c && u->name && strlen(u->name))
137 static void StartNetworkServer(int port)
142 NetworkServer(port, options.serveronly);
149 "cannot create network server process - no network games");
150 options.network = FALSE;
154 /* we are parent process -- resume normal operation */
159 boolean ConnectToServer(char *host, int port)
162 struct sockaddr_in s;
163 struct protoent *tcpproto;
168 if ((s.sin_addr.s_addr = inet_addr(host)) == -1)
170 hp = gethostbyname(host);
172 Error(ERR_EXIT, "cannot locate host '%s'", host);
174 s.sin_addr = *(struct in_addr *)(hp->h_addr_list[0]);
178 s.sin_addr.s_addr = inet_addr("127.0.0.1");
183 s.sin_port = htons(port);
184 s.sin_family = AF_INET;
186 sfd = socket(PF_INET, SOCK_STREAM, 0);
188 Error(ERR_EXIT, "out of file descriptors");
190 if ((tcpproto = getprotobyname("tcp")) != NULL)
191 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
193 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) < 0)
197 printf("No rocksndiamonds server on localhost - starting up one ...\n");
199 StartNetworkServer(port);
206 sfd = socket(PF_INET, SOCK_STREAM, 0);
208 Error(ERR_EXIT, "out of file descriptors");
210 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY,
211 (char *)&on, sizeof(int));
213 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0)
217 Error(ERR_EXIT, "cannot connect to server");
220 Error(ERR_EXIT, "cannot connect to server");
226 void SendToServer_Nickname(char *nickname)
228 static char msgbuf[300];
229 int len_nickname = strlen(nickname);
231 buf[1] = OP_NICKNAME;
232 memcpy(&buf[2], nickname, len_nickname);
233 sendbuf(2 + len_nickname);
234 sprintf(msgbuf, "you set your nick to \"%s\"", nickname);
238 void SendToServer_ProtocolVersion()
240 buf[1] = OP_PROTOCOL_VERSION;
241 buf[2] = PROTOCOL_VERSION_1;
242 buf[3] = PROTOCOL_VERSION_2;
243 buf[4] = PROTOCOL_VERSION_3;
248 void SendToServer_NrWanted(int nr_wanted)
250 buf[1] = OP_NUMBER_WANTED;
256 void SendToServer_StartPlaying()
258 unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
260 buf[1] = OP_START_PLAYING;
261 buf[2] = (byte)(level_nr >> 8);
262 buf[3] = (byte)(level_nr & 0xff);
263 buf[4] = (byte)(leveldir_nr >> 8);
264 buf[5] = (byte)(leveldir_nr & 0xff);
266 buf[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
267 buf[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
268 buf[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
269 buf[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
271 strcpy(&buf[10], leveldir[leveldir_nr].name);
273 sendbuf(10 + strlen(leveldir[leveldir_nr].name)+1);
276 void SendToServer_PausePlaying()
278 buf[1] = OP_PAUSE_PLAYING;
283 void SendToServer_ContinuePlaying()
285 buf[1] = OP_CONTINUE_PLAYING;
290 void SendToServer_StopPlaying()
292 buf[1] = OP_STOP_PLAYING;
297 void SendToServer_MovePlayer(byte player_action)
299 buf[1] = OP_MOVE_FIGURE;
300 buf[2] = player_action;
305 static void Handle_OP_BAD_PROTOCOL_VERSION()
307 Error(ERR_WARN, "protocol version mismatch");
308 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
310 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
313 static void Handle_OP_YOUR_NUMBER()
315 int new_client_nr = buf[2];
316 int new_index_nr = new_client_nr - 1;
317 struct PlayerInfo *old_local_player = local_player;
318 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
320 printf("OP_YOUR_NUMBER: %d\n", buf[0]);
321 me.nr = new_client_nr;
323 if (old_local_player != new_local_player)
325 /* copy existing player settings and change to new player */
327 *new_local_player = *old_local_player;
328 old_local_player->connected = FALSE;
330 local_player = new_local_player;
333 TestPlayer = new_index_nr;
335 if (me.nr > MAX_PLAYERS)
336 Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS);
338 sprintf(msgbuf, "you get client # %d", new_client_nr);
342 static void Handle_OP_NUMBER_WANTED()
344 int client_nr_wanted = buf[2];
345 int old_client_nr = buf[0];
346 int new_client_nr = buf[3];
347 int old_index_nr = old_client_nr - 1;
348 int new_index_nr = new_client_nr - 1;
349 int index_nr_wanted = client_nr_wanted - 1;
350 struct PlayerInfo *old_player = &stored_player[old_index_nr];
351 struct PlayerInfo *new_player = &stored_player[new_index_nr];
353 printf("OP_NUMBER_WANTED: %d\n", buf[0]);
355 if (new_client_nr == client_nr_wanted) /* switching succeeded */
359 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
361 sprintf(msgbuf, "client %d switches to # %d",
362 old_client_nr, new_client_nr);
365 else if (old_client_nr == me.nr) /* local player keeps his nr */
367 sprintf(msgbuf, "keeping client # %d", new_client_nr);
371 if (old_client_nr != new_client_nr)
373 /* copy existing player settings and change to new player */
375 *new_player = *old_player;
376 old_player->connected = FALSE;
379 u = finduser(old_client_nr);
380 u->nr = new_client_nr;
382 if (old_player == local_player) /* local player switched */
383 local_player = new_player;
386 TestPlayer = new_index_nr;
388 else if (old_client_nr == me.nr) /* failed -- local player? */
390 char *color[] = { "yellow", "red", "green", "blue" };
392 sprintf(msgbuf, "Sorry ! %s player still exists ! You are %s player !",
393 color[index_nr_wanted], color[new_index_nr]);
394 Request(msgbuf, REQ_CONFIRM);
396 sprintf(msgbuf, "cannot switch -- you keep client # %d",
402 static void Handle_OP_NICKNAME(unsigned int len)
406 printf("OP_NICKNAME: %d\n", buf[0]);
407 u = finduser(buf[0]);
409 sprintf(msgbuf, "client %d calls itself \"%s\"", buf[0], &buf[2]);
411 strncpy(u->name, &buf[2], MAXNICKLEN);
414 static void Handle_OP_PLAYER_CONNECTED()
416 struct user *u, *v = NULL;
417 int new_client_nr = buf[0];
418 int new_index_nr = new_client_nr - 1;
420 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
421 sprintf(msgbuf, "new client %d connected", new_client_nr);
424 for (u = &me; u; u = u->next)
426 if (u->nr == new_client_nr)
427 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
432 v->next = u = checked_malloc(sizeof(struct user));
433 u->nr = new_client_nr;
437 stored_player[new_index_nr].connected = TRUE;
440 static void Handle_OP_PLAYER_DISCONNECTED()
444 printf("OP_PLAYER_DISCONNECTED: %d\n", buf[0]);
445 u = finduser(buf[0]);
446 sprintf(msgbuf, "client %d (%s) disconnected",
447 buf[0], get_user_name(buf[0]));
450 for (v = &me; v; v = v->next)
456 static void Handle_OP_START_PLAYING()
458 int new_level_nr, new_leveldir_nr;
459 unsigned long new_random_seed;
460 unsigned char *new_leveldir_name;
463 if (game_status == PLAYING)
467 new_level_nr = (buf[2] << 8) + buf[3];
468 new_leveldir_nr = (buf[4] << 8) + buf[5];
470 (buf[6] << 24) | (buf[7] << 16) | (buf[8] << 8) | (buf[9]);
471 new_leveldir_name = &buf[10];
473 printf("OP_START_PLAYING: %d\n", buf[0]);
474 sprintf(msgbuf, "client %d starts game [level %d from levedir %d (%s)]\n",
482 if (strcmp(leveldir[new_leveldir_nr].name, new_leveldir_name) != 0)
483 Error(ERR_WARN, "no such level directory: '%s'",new_leveldir_name);
485 leveldir_nr = new_leveldir_nr;
488 local_player->leveldir_nr = leveldir_nr;
497 LoadPlayerInfo(PLAYER_LEVEL);
498 SavePlayerInfo(PLAYER_SETUP);
502 level_nr = new_level_nr;
515 if (setup.autorecord)
516 TapeStartRecording();
521 tape.random_seed = new_random_seed;
523 InitRND(new_random_seed);
527 printf("tape.random_seed == %d\n", tape.random_seed);
530 game_status = PLAYING;
534 static void Handle_OP_PAUSE_PLAYING()
536 printf("OP_PAUSE_PLAYING: %d\n", buf[0]);
537 sprintf(msgbuf, "client %d pauses game", buf[0]);
541 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
544 static void Handle_OP_CONTINUE_PLAYING()
546 printf("OP_CONTINUE_PLAYING: %d\n", buf[0]);
547 sprintf(msgbuf, "client %d continues game", buf[0]);
550 tape.pausing = FALSE;
551 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
554 static void Handle_OP_STOP_PLAYING()
556 printf("OP_STOP_PLAYING: %d\n", buf[0]);
557 sprintf(msgbuf, "client %d stops game", buf[0]);
560 game_status = MAINMENU;
564 static void Handle_OP_MOVE_FIGURE(unsigned int len)
569 if (!network_playing)
573 (buf[2] << 24) | (buf[3] << 16) | (buf[4] << 8) | (buf[5]);
575 if (frame_nr != FrameCounter)
577 Error(ERR_RETURN, "client and servers frame counters out of sync");
578 Error(ERR_RETURN, "frame counter of client is %d", FrameCounter);
579 Error(ERR_RETURN, "frame counter of server is %d", frame_nr);
580 Error(ERR_EXIT, "this should not happen -- please debug");
583 /* copy valid player actions */
584 for (i=0; i<MAX_PLAYERS; i++)
585 stored_player[i].effective_action =
586 (i < len - 6 && stored_player[i].active ? buf[6 + i] : 0);
588 network_player_action_received = TRUE;
591 sprintf(msgbuf, "frame %d: client %d moves player [0x%02x]",
592 FrameCounter, buf[0], buf[2]);
597 static void HandleNetworkingMessages()
601 while (nread >= 4 && nread >= 4 + readbuf[3])
604 if (readbuf[0] || readbuf[1] || readbuf[2])
605 Error(ERR_EXIT, "wrong network server line length");
607 memcpy(buf, &readbuf[4], len);
609 memmove(readbuf, readbuf + 4 + len, nread);
613 case OP_BAD_PROTOCOL_VERSION:
614 Handle_OP_BAD_PROTOCOL_VERSION();
618 Handle_OP_YOUR_NUMBER();
621 case OP_NUMBER_WANTED:
622 Handle_OP_NUMBER_WANTED();
626 Handle_OP_NICKNAME(len);
629 case OP_PLAYER_CONNECTED:
630 Handle_OP_PLAYER_CONNECTED();
633 case OP_PLAYER_DISCONNECTED:
634 Handle_OP_PLAYER_DISCONNECTED();
637 case OP_START_PLAYING:
638 Handle_OP_START_PLAYING();
641 case OP_PAUSE_PLAYING:
642 Handle_OP_PAUSE_PLAYING();
645 case OP_CONTINUE_PLAYING:
646 Handle_OP_CONTINUE_PLAYING();
649 case OP_STOP_PLAYING:
650 Handle_OP_STOP_PLAYING();
654 Handle_OP_MOVE_FIGURE(len);
658 printf("OP_WON: %d\n", buf[0]);
659 sprintf(msgbuf, "client %d wins the game", buf[0]);
664 printf("OP_MSG: %d\n", buf[0]);
665 sprintf(msgbuf, "client %d sends message", buf[0]);
673 void HandleNetworking()
675 static struct timeval tv = { 0, 0 };
684 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
686 if (r < 0 && errno != EINTR)
687 Error(ERR_EXIT, "HandleNetworking(): select() failed");
692 if (FD_ISSET(sfd, &rfds))
696 r = read(sfd, readbuf + nread, MAX_BUFFER_SIZE - nread);
699 Error(ERR_EXIT, "error reading from network server");
702 Error(ERR_EXIT, "connection to network server lost");
706 HandleNetworkingMessages();