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>
23 #include <netinet/in.h>
24 #include <netinet/tcp.h>
25 #include <arpa/inet.h>
28 #include "libgame/libgame.h"
32 static int clients = 0;
33 static int onceonly = 0;
35 struct NetworkServerPlayerInfo
40 struct NetworkServerPlayerInfo *next;
43 unsigned char readbuffer[MAX_BUFFER_SIZE];
44 unsigned char writbuffer[MAX_BUFFER_SIZE];
47 boolean action_received;
50 static struct NetworkServerPlayerInfo *first_player = NULL;
52 #define NEXT(player) ((player)->next ? (player)->next : first_player)
54 static struct sockaddr_in saddr;
56 static unsigned char realbuffer[512], *buffer = realbuffer + 4;
61 static unsigned long ServerFrameCounter = 0;
65 static void addtobuffer(struct NetworkServerPlayerInfo *player,
66 unsigned char *b, int len)
68 if (player->nwrite + len >= MAX_BUFFER_SIZE)
69 Error(ERR_EXIT_NETWORK_SERVER,
70 "internal error: network send buffer overflow");
72 memcpy(player->writbuffer + player->nwrite, b, len);
73 player->nwrite += len;
76 static void flushuser(struct NetworkServerPlayerInfo *player)
80 write(player->fd, player->writbuffer, player->nwrite);
85 static void broadcast(struct NetworkServerPlayerInfo *except,
86 int len, int activeonly)
88 struct NetworkServerPlayerInfo *player;
90 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
91 realbuffer[3] = (unsigned char)len;
92 for (player = first_player; player; player = player->next)
93 if (player != except && player->introduced &&
94 (player->active || !activeonly))
95 addtobuffer(player, realbuffer, 4 + len);
98 static void sendtoone(struct NetworkServerPlayerInfo *to, int len)
100 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
101 realbuffer[3] = (unsigned char)len;
102 addtobuffer(to, realbuffer, 4 + len);
105 static void RemovePlayer(struct NetworkServerPlayerInfo *player)
107 struct NetworkServerPlayerInfo *v;
110 Error(ERR_NETWORK_SERVER, "dropping client %d (%s)",
111 player->number, player->player_name);
113 if (player == first_player)
114 first_player = player->next;
117 for (v = first_player; v; v = v->next)
119 if (v->next && v->next == player)
121 v->next = player->next;
128 if (player->introduced)
130 buffer[0] = player->number;
131 buffer[1] = OP_PLAYER_DISCONNECTED;
132 broadcast(player, 2, 0);
138 if (onceonly && clients == 0)
142 Error(ERR_NETWORK_SERVER, "no clients left");
143 Error(ERR_NETWORK_SERVER, "aborting");
149 static void AddPlayer(int fd)
151 struct NetworkServerPlayerInfo *player, *v;
153 boolean again = TRUE;
155 player = checked_malloc(sizeof (struct NetworkServerPlayerInfo));
158 player->player_name[0] = 0;
159 player->next = first_player;
163 player->introduced = 0;
165 player->action_received = FALSE;
167 first_player = player;
179 if (v->number == nxn)
194 if (v->number == nxn)
203 player->number = nxn;
205 Error(ERR_NETWORK_SERVER, "client %d connecting from %s",
206 nxn, inet_ntoa(saddr.sin_addr));
210 buffer[1] = OP_YOUR_NUMBER;
211 buffer[2] = player->number;
212 sendtoone(player, 3);
215 static void Handle_OP_PROTOCOL_VERSION(struct NetworkServerPlayerInfo *player,
219 buffer[2] != PROTOCOL_VERSION_1 ||
220 buffer[3] != PROTOCOL_VERSION_2)
223 Error(ERR_NETWORK_SERVER,
224 "client %d (%s) has wrong protocol version %d.%d.%d",
225 player->number, player->player_name, buffer[2], buffer[3], buffer[4]);
228 buffer[1] = OP_BAD_PROTOCOL_VERSION;
229 buffer[2] = PROTOCOL_VERSION_1;
230 buffer[3] = PROTOCOL_VERSION_2;
231 buffer[4] = PROTOCOL_VERSION_3;
232 sendtoone(player, 5);
235 RemovePlayer(player);
241 Error(ERR_NETWORK_SERVER,
242 "client %d (%s) uses protocol version %d.%d.%d",
243 player->number, player->player_name, buffer[2], buffer[3], buffer[4]);
247 static void Handle_OP_NUMBER_WANTED(struct NetworkServerPlayerInfo *player)
249 struct NetworkServerPlayerInfo *v;
250 int client_nr = player->number;
251 int nr_wanted = buffer[2];
255 Error(ERR_NETWORK_SERVER, "client %d (%s) wants to switch to # %d",
256 player->number, player->player_name, nr_wanted);
258 for (v = first_player; v; v = v->next)
260 if (v->number == nr_wanted)
270 Error(ERR_NETWORK_SERVER, "client %d (%s) switches to # %d",
271 player->number, player->player_name, nr_wanted);
272 else if (player->number == nr_wanted)
273 Error(ERR_NETWORK_SERVER, "client %d (%s) still has # %d",
274 player->number, player->player_name, nr_wanted);
276 Error(ERR_NETWORK_SERVER,
277 "client %d (%s) cannot switch (client %d still exists)",
278 player->number, player->player_name, nr_wanted);
282 player->number = nr_wanted;
284 buffer[0] = client_nr;
285 buffer[1] = OP_NUMBER_WANTED;
286 buffer[2] = nr_wanted;
287 buffer[3] = player->number;
290 sendtoone(player, 4);
293 broadcast(NULL, 4, 0);
296 static void Handle_OP_PLAYER_NAME(struct NetworkServerPlayerInfo *player,
299 struct NetworkServerPlayerInfo *v;
304 memcpy(player->player_name, &buffer[2], len-2);
305 player->player_name[len-2] = 0;
306 for (i = 0; i < len - 2; i++)
308 if (player->player_name[i] < ' ' ||
309 ((unsigned char)(player->player_name[i]) > 0x7e &&
310 (unsigned char)(player->player_name[i]) <= 0xa0))
312 player->player_name[i] = 0;
317 if (!player->introduced)
319 buffer[0] = player->number;
320 buffer[1] = OP_PLAYER_CONNECTED;
321 broadcast(player, 2, 0);
325 Error(ERR_NETWORK_SERVER, "client %d calls itself \"%s\"",
326 player->number, player->player_name);
327 buffer[1] = OP_PLAYER_NAME;
328 broadcast(player, len, 0);
330 if (!player->introduced)
332 for (v = first_player; v; v = v->next)
334 if (v != player && v->introduced)
336 buffer[0] = v->number;
337 buffer[1] = OP_PLAYER_CONNECTED;
338 sendtoone(player, 2);
339 buffer[1] = OP_PLAYER_NAME;
340 memcpy(&buffer[2], v->player_name, 14);
341 sendtoone(player, 2+strlen(v->player_name));
346 player->introduced = 1;
349 static void Handle_OP_START_PLAYING(struct NetworkServerPlayerInfo *player)
351 struct NetworkServerPlayerInfo *v, *w;
354 Error(ERR_NETWORK_SERVER,
355 "client %d (%s) starts game [level %d from levedir %d (%s)]",
356 player->number, player->player_name,
357 (buffer[2] << 8) + buffer[3],
358 (buffer[4] << 8) + buffer[5],
361 for (w = first_player; w; w = w->next)
365 /* reset frame counter */
366 ServerFrameCounter = 0;
368 /* reset player actions */
369 for (v = first_player; v; v = v->next)
372 v->action_received = FALSE;
375 broadcast(NULL, 10 + strlen((char *)&buffer[10])+1, 0);
378 static void Handle_OP_PAUSE_PLAYING(struct NetworkServerPlayerInfo *player)
381 Error(ERR_NETWORK_SERVER, "client %d (%s) pauses game",
382 player->number, player->player_name);
383 broadcast(NULL, 2, 0);
386 static void Handle_OP_CONTINUE_PLAYING(struct NetworkServerPlayerInfo *player)
389 Error(ERR_NETWORK_SERVER, "client %d (%s) continues game",
390 player->number, player->player_name);
391 broadcast(NULL, 2, 0);
394 static void Handle_OP_STOP_PLAYING(struct NetworkServerPlayerInfo *player)
397 Error(ERR_NETWORK_SERVER, "client %d (%s) stops game",
398 player->number, player->player_name);
399 broadcast(NULL, 2, 0);
402 static void Handle_OP_MOVE_PLAYER(struct NetworkServerPlayerInfo *player)
404 struct NetworkServerPlayerInfo *v;
405 int last_client_nr = 0;
408 /* store player action */
409 for (v = first_player; v; v = v->next)
411 if (v->number == player->number)
413 v->action = buffer[2];
414 v->action_received = TRUE;
418 /* check if server received action from each player */
419 for (v = first_player; v; v = v->next)
421 if (!v->action_received)
424 if (v->number > last_client_nr)
425 last_client_nr = v->number;
428 /* initialize all player actions to zero */
429 for (i = 0; i < last_client_nr; i++)
432 /* broadcast actions of all players to all players */
433 for (v = first_player; v; v = v->next)
435 buffer[6 + v->number-1] = v->action;
437 v->action_received = FALSE;
440 buffer[2] = (unsigned char)((ServerFrameCounter >> 24) & 0xff);
441 buffer[3] = (unsigned char)((ServerFrameCounter >> 16) & 0xff);
442 buffer[4] = (unsigned char)((ServerFrameCounter >> 8) & 0xff);
443 buffer[5] = (unsigned char)((ServerFrameCounter >> 0) & 0xff);
445 broadcast(NULL, 6 + last_client_nr, 0);
447 ServerFrameCounter++;
450 void NetworkServer(int port, int serveronly)
453 struct NetworkServerPlayerInfo *player;
457 struct protoent *tcpproto;
462 struct sigaction sact;
466 port = DEFAULT_SERVER_PORT;
471 if ((tcpproto = getprotobyname("tcp")) != NULL)
472 tcp = tcpproto->p_proto;
475 signal(SIGPIPE, SIG_IGN);
477 sact.sa_handler = SIG_IGN;
478 sigemptyset(&sact.sa_mask);
480 sigaction(SIGPIPE, &sact, NULL);
484 if ((lfd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
485 Error(ERR_EXIT_NETWORK_SERVER, "socket() failed");
487 saddr.sin_family = AF_INET;
488 saddr.sin_addr.s_addr = htonl(INADDR_ANY);
489 saddr.sin_port = htons(port);
493 setsockopt(lfd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(int));
494 if (bind(lfd, (struct sockaddr *)&saddr, sizeof(saddr)) < 0)
495 Error(ERR_EXIT_NETWORK_SERVER, "bind() failed");
501 /* become a daemon, breaking all ties with the controlling terminal */
502 options.verbose = FALSE;
503 for (i = 0; i < 255; i++)
516 /* open a fake stdin, stdout, stderr, just in case */
517 open("/dev/null", O_RDONLY);
518 open("/dev/null", O_WRONLY);
519 open("/dev/null", O_WRONLY);
524 Error(ERR_NETWORK_SERVER, "started up, listening on port %d", port);
525 Error(ERR_NETWORK_SERVER, "using protocol version %d.%d.%d",
526 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
533 for (player = first_player; player; player = player->next)
538 player = first_player;
541 FD_SET(player->fd, &fds);
542 if (player->fd > mfd)
544 player = player->next;
549 if ((sl = select(mfd + 1, &fds, NULL, NULL, &tv)) < 0)
552 Error(ERR_EXIT_NETWORK_SERVER, "select() failed");
563 if (FD_ISSET(lfd, &fds))
567 slen = sizeof(saddr);
568 newfd = accept(lfd, (struct sockaddr *)&saddr, &slen);
572 Error(ERR_EXIT_NETWORK_SERVER, "accept() failed");
579 setsockopt(newfd, tcp, TCP_NODELAY, (char *)&on, sizeof(int));
586 player = first_player;
590 if (FD_ISSET(player->fd, &fds))
592 r = read(player->fd, player->readbuffer + player->nread, MAX_BUFFER_SIZE - player->nread);
596 Error(ERR_NETWORK_SERVER, "EOF from client %d (%s)",
597 player->number, player->player_name);
598 RemovePlayer(player);
603 while (player->nread >= 4 && player->nread >= 4 + player->readbuffer[3])
605 len = player->readbuffer[3];
606 if (player->readbuffer[0] || player->readbuffer[1] || player->readbuffer[2])
609 Error(ERR_NETWORK_SERVER, "crap from client %d (%s)",
610 player->number, player->player_name);
611 RemovePlayer(player);
615 memcpy(buffer, &player->readbuffer[4], len);
616 player->nread -= 4 + len;
617 memmove(player->readbuffer, player->readbuffer + 4 + len, player->nread);
619 buffer[0] = player->number;
620 if (!player->introduced && buffer[1] != OP_PLAYER_NAME)
623 Error(ERR_NETWORK_SERVER, "!(client %d)->introduced && buffer[1]==%d (expected OP_PLAYER_NAME)", buffer[0], buffer[1]);
625 RemovePlayer(player);
633 Handle_OP_PLAYER_NAME(player, len);
636 case OP_PROTOCOL_VERSION:
637 Handle_OP_PROTOCOL_VERSION(player, len);
640 case OP_NUMBER_WANTED:
641 Handle_OP_NUMBER_WANTED(player);
644 case OP_START_PLAYING:
645 Handle_OP_START_PLAYING(player);
648 case OP_PAUSE_PLAYING:
649 Handle_OP_PAUSE_PLAYING(player);
652 case OP_CONTINUE_PLAYING:
653 Handle_OP_CONTINUE_PLAYING(player);
656 case OP_STOP_PLAYING:
657 Handle_OP_STOP_PLAYING(player);
661 Handle_OP_MOVE_PLAYER(player);
664 case OP_BROADCAST_MESSAGE:
667 Error(ERR_NETWORK_SERVER, "client %d (%s) sends message: %s",
668 player->number, player->player_name, &buffer[2]);
669 broadcast(player, len, 0);
674 Error(ERR_NETWORK_SERVER,
675 "unknown opcode %d from client %d (%s)",
676 buffer[0], player->number, player->player_name);
681 if (player && !interrupt)
682 player = player->next;
684 while (player && !interrupt);
688 #endif /* PLATFORM_UNIX */