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)
23 #if defined(TARGET_SDL)
26 #include <sys/socket.h>
27 #include <netinet/in.h>
28 #include <netinet/tcp.h>
29 #include <arpa/inet.h>
31 #include <sys/select.h> /* apparently needed for OS/2 port */
34 #include "libgame/libgame.h"
38 static int clients = 0;
39 static int onceonly = 0;
41 struct NetworkServerPlayerInfo
43 #if defined(TARGET_SDL)
51 struct NetworkServerPlayerInfo *next;
54 unsigned char readbuffer[MAX_BUFFER_SIZE];
55 unsigned char writbuffer[MAX_BUFFER_SIZE];
58 boolean action_received;
61 static struct NetworkServerPlayerInfo *first_player = NULL;
63 #define NEXT(player) ((player)->next ? (player)->next : first_player)
65 #if defined(TARGET_SDL)
66 /* TODO: peer address */
67 static TCPsocket lfd; /* listening socket */
68 static SDLNet_SocketSet fds; /* socket set */
70 static struct sockaddr_in saddr;
71 static int lfd; /* listening socket */
72 static fd_set fds; /* socket set */
76 static unsigned char realbuffer[512], *buffer = realbuffer + 4;
80 static unsigned long ServerFrameCounter = 0;
82 static void addtobuffer(struct NetworkServerPlayerInfo *player,
83 unsigned char *b, int len)
85 if (player->nwrite + len >= MAX_BUFFER_SIZE)
86 Error(ERR_EXIT_NETWORK_SERVER,
87 "internal error: network send buffer overflow");
89 memcpy(player->writbuffer + player->nwrite, b, len);
90 player->nwrite += len;
93 static void flushuser(struct NetworkServerPlayerInfo *player)
97 #if defined(TARGET_SDL)
98 SDLNet_TCP_Send(player->fd, player->writbuffer, player->nwrite);
100 write(player->fd, player->writbuffer, player->nwrite);
106 static void broadcast(struct NetworkServerPlayerInfo *except,
107 int len, int activeonly)
109 struct NetworkServerPlayerInfo *player;
111 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
112 realbuffer[3] = (unsigned char)len;
113 for (player = first_player; player; player = player->next)
114 if (player != except && player->introduced &&
115 (player->active || !activeonly))
116 addtobuffer(player, realbuffer, 4 + len);
119 static void sendtoone(struct NetworkServerPlayerInfo *to, int len)
121 realbuffer[0] = realbuffer[1] = realbuffer[2] = 0;
122 realbuffer[3] = (unsigned char)len;
123 addtobuffer(to, realbuffer, 4 + len);
126 static void RemovePlayer(struct NetworkServerPlayerInfo *player)
128 struct NetworkServerPlayerInfo *v;
131 Error(ERR_NETWORK_SERVER, "dropping client %d (%s)",
132 player->number, player->player_name);
134 if (player == first_player)
135 first_player = player->next;
138 for (v = first_player; v; v = v->next)
140 if (v->next && v->next == player)
142 v->next = player->next;
148 #if defined(TARGET_SDL)
149 SDLNet_TCP_DelSocket(fds, player->fd);
150 SDLNet_TCP_Close(player->fd);
155 if (player->introduced)
157 buffer[0] = player->number;
158 buffer[1] = OP_PLAYER_DISCONNECTED;
159 broadcast(player, 2, 0);
165 if (onceonly && clients == 0)
169 Error(ERR_NETWORK_SERVER, "no clients left");
170 Error(ERR_NETWORK_SERVER, "aborting");
176 #if defined(TARGET_SDL)
177 static void AddPlayer(TCPsocket fd)
179 static void AddPlayer(int fd)
182 struct NetworkServerPlayerInfo *player, *v;
184 boolean again = TRUE;
186 player = checked_malloc(sizeof (struct NetworkServerPlayerInfo));
189 player->player_name[0] = 0;
190 player->next = first_player;
194 player->introduced = 0;
196 player->action_received = FALSE;
198 #if defined(TARGET_SDL)
199 SDLNet_TCP_AddSocket(fds, fd);
202 first_player = player;
213 if (v->number == nxn)
224 player->number = nxn;
225 #if !defined(TARGET_SDL)
227 Error(ERR_NETWORK_SERVER, "client %d connecting from %s",
228 nxn, inet_ntoa(saddr.sin_addr));
233 buffer[1] = OP_YOUR_NUMBER;
234 buffer[2] = player->number;
235 sendtoone(player, 3);
238 static void Handle_OP_PROTOCOL_VERSION(struct NetworkServerPlayerInfo *player,
242 buffer[2] != PROTOCOL_VERSION_1 ||
243 buffer[3] != PROTOCOL_VERSION_2)
246 Error(ERR_NETWORK_SERVER,
247 "client %d (%s) has wrong protocol version %d.%d.%d",
248 player->number, player->player_name, buffer[2], buffer[3], buffer[4]);
251 buffer[1] = OP_BAD_PROTOCOL_VERSION;
252 buffer[2] = PROTOCOL_VERSION_1;
253 buffer[3] = PROTOCOL_VERSION_2;
254 buffer[4] = PROTOCOL_VERSION_3;
255 sendtoone(player, 5);
258 RemovePlayer(player);
264 Error(ERR_NETWORK_SERVER,
265 "client %d (%s) uses protocol version %d.%d.%d",
266 player->number, player->player_name, buffer[2], buffer[3], buffer[4]);
270 static void Handle_OP_NUMBER_WANTED(struct NetworkServerPlayerInfo *player)
272 struct NetworkServerPlayerInfo *v;
273 int client_nr = player->number;
274 int nr_wanted = buffer[2];
278 Error(ERR_NETWORK_SERVER, "client %d (%s) wants to switch to # %d",
279 player->number, player->player_name, nr_wanted);
281 for (v = first_player; v; v = v->next)
283 if (v->number == nr_wanted)
293 Error(ERR_NETWORK_SERVER, "client %d (%s) switches to # %d",
294 player->number, player->player_name, nr_wanted);
295 else if (player->number == nr_wanted)
296 Error(ERR_NETWORK_SERVER, "client %d (%s) still has # %d",
297 player->number, player->player_name, nr_wanted);
299 Error(ERR_NETWORK_SERVER,
300 "client %d (%s) cannot switch (client %d still exists)",
301 player->number, player->player_name, nr_wanted);
305 player->number = nr_wanted;
307 buffer[0] = client_nr;
308 buffer[1] = OP_NUMBER_WANTED;
309 buffer[2] = nr_wanted;
310 buffer[3] = player->number;
313 sendtoone(player, 4);
316 broadcast(NULL, 4, 0);
319 static void Handle_OP_PLAYER_NAME(struct NetworkServerPlayerInfo *player,
322 struct NetworkServerPlayerInfo *v;
327 memcpy(player->player_name, &buffer[2], len-2);
328 player->player_name[len-2] = 0;
329 for (i = 0; i < len - 2; i++)
331 if (player->player_name[i] < ' ' ||
332 ((unsigned char)(player->player_name[i]) > 0x7e &&
333 (unsigned char)(player->player_name[i]) <= 0xa0))
335 player->player_name[i] = 0;
340 if (!player->introduced)
342 buffer[0] = player->number;
343 buffer[1] = OP_PLAYER_CONNECTED;
344 broadcast(player, 2, 0);
348 Error(ERR_NETWORK_SERVER, "client %d calls itself \"%s\"",
349 player->number, player->player_name);
350 buffer[1] = OP_PLAYER_NAME;
351 broadcast(player, len, 0);
353 if (!player->introduced)
355 for (v = first_player; v; v = v->next)
357 if (v != player && v->introduced)
359 buffer[0] = v->number;
360 buffer[1] = OP_PLAYER_CONNECTED;
361 sendtoone(player, 2);
362 buffer[1] = OP_PLAYER_NAME;
363 memcpy(&buffer[2], v->player_name, 14);
364 sendtoone(player, 2+strlen(v->player_name));
369 player->introduced = 1;
372 static void Handle_OP_START_PLAYING(struct NetworkServerPlayerInfo *player)
374 struct NetworkServerPlayerInfo *v, *w;
377 Error(ERR_NETWORK_SERVER,
378 "client %d (%s) starts game [level %d from levedir %d (%s)]",
379 player->number, player->player_name,
380 (buffer[2] << 8) + buffer[3],
381 (buffer[4] << 8) + buffer[5],
384 for (w = first_player; w; w = w->next)
388 /* reset frame counter */
389 ServerFrameCounter = 0;
391 /* reset player actions */
392 for (v = first_player; v; v = v->next)
395 v->action_received = FALSE;
398 broadcast(NULL, 10 + strlen((char *)&buffer[10])+1, 0);
401 static void Handle_OP_PAUSE_PLAYING(struct NetworkServerPlayerInfo *player)
404 Error(ERR_NETWORK_SERVER, "client %d (%s) pauses game",
405 player->number, player->player_name);
406 broadcast(NULL, 2, 0);
409 static void Handle_OP_CONTINUE_PLAYING(struct NetworkServerPlayerInfo *player)
412 Error(ERR_NETWORK_SERVER, "client %d (%s) continues game",
413 player->number, player->player_name);
414 broadcast(NULL, 2, 0);
417 static void Handle_OP_STOP_PLAYING(struct NetworkServerPlayerInfo *player)
420 Error(ERR_NETWORK_SERVER, "client %d (%s) stops game",
421 player->number, player->player_name);
422 broadcast(NULL, 2, 0);
425 static void Handle_OP_MOVE_PLAYER(struct NetworkServerPlayerInfo *player)
427 struct NetworkServerPlayerInfo *v;
428 int last_client_nr = 0;
431 /* store player action */
432 for (v = first_player; v; v = v->next)
434 if (v->number == player->number)
436 v->action = buffer[2];
437 v->action_received = TRUE;
441 /* check if server received action from each player */
442 for (v = first_player; v; v = v->next)
444 if (!v->action_received)
447 if (v->number > last_client_nr)
448 last_client_nr = v->number;
451 /* initialize all player actions to zero */
452 for (i = 0; i < last_client_nr; i++)
455 /* broadcast actions of all players to all players */
456 for (v = first_player; v; v = v->next)
458 buffer[6 + v->number-1] = v->action;
460 v->action_received = FALSE;
463 buffer[2] = (unsigned char)((ServerFrameCounter >> 24) & 0xff);
464 buffer[3] = (unsigned char)((ServerFrameCounter >> 16) & 0xff);
465 buffer[4] = (unsigned char)((ServerFrameCounter >> 8) & 0xff);
466 buffer[5] = (unsigned char)((ServerFrameCounter >> 0) & 0xff);
468 broadcast(NULL, 6 + last_client_nr, 0);
470 ServerFrameCounter++;
473 #if defined(TARGET_SDL)
474 /* the following is not used for a standalone server;
475 the pointer points to an integer containing the port-number */
476 int NetworkServerThread(void *ptr)
478 NetworkServer(*((int *) ptr), 0);
480 /* should never be reached */
485 void NetworkServer(int port, int serveronly)
488 struct NetworkServerPlayerInfo *player;
491 #if defined(TARGET_SDL)
496 struct protoent *tcpproto;
501 #if defined(PLATFORM_UNIX) && !defined(PLATFORM_NEXT)
502 struct sigaction sact;
506 port = DEFAULT_SERVER_PORT;
511 #if !defined(TARGET_SDL)
512 if ((tcpproto = getprotobyname("tcp")) != NULL)
513 tcp = tcpproto->p_proto;
516 #if defined(PLATFORM_UNIX)
517 #if defined(PLATFORM_NEXT)
518 signal(SIGPIPE, SIG_IGN);
520 sact.sa_handler = SIG_IGN;
521 sigemptyset(&sact.sa_mask);
523 sigaction(SIGPIPE, &sact, NULL);
527 #if defined(TARGET_SDL)
529 /* assume that SDL is already initialized */
531 if (SDLNet_Init() == -1)
532 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_Init() failed");
536 if (SDLNet_ResolveHost(&ip, NULL, port) == -1)
537 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_ResolveHost() failed");
539 lfd = SDLNet_TCP_Open(&ip);
541 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_Open() failed");
543 fds = SDLNet_AllocSocketSet(MAX_PLAYERS+1);
544 SDLNet_TCP_AddSocket(fds, lfd);
548 if ((lfd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
549 Error(ERR_EXIT_NETWORK_SERVER, "socket() failed");
551 saddr.sin_family = AF_INET;
552 saddr.sin_addr.s_addr = htonl(INADDR_ANY);
553 saddr.sin_port = htons(port);
557 setsockopt(lfd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(int));
558 if (bind(lfd, (struct sockaddr *)&saddr, sizeof(saddr)) < 0)
559 Error(ERR_EXIT_NETWORK_SERVER, "bind() failed");
564 #if !defined(TARGET_SDL)
567 /* become a daemon, breaking all ties with the controlling terminal */
568 options.verbose = FALSE;
569 for (i = 0; i < 255; i++)
582 /* open a fake stdin, stdout, stderr, just in case */
583 open("/dev/null", O_RDONLY);
584 open("/dev/null", O_WRONLY);
585 open("/dev/null", O_WRONLY);
591 Error(ERR_NETWORK_SERVER, "started up, listening on port %d", port);
592 Error(ERR_NETWORK_SERVER, "using protocol version %d.%d.%d",
593 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
600 for (player = first_player; player; player = player->next)
603 #if defined(TARGET_SDL)
604 if ((sl = SDLNet_CheckSockets(fds, 500000)) < 1)
606 Error(ERR_NETWORK_SERVER, SDLNet_GetError());
607 perror("SDLNet_CheckSockets");
614 player = first_player;
617 FD_SET(player->fd, &fds);
618 if (player->fd > mfd)
620 player = player->next;
625 if ((sl = select(mfd + 1, &fds, NULL, NULL, &tv)) < 0)
628 Error(ERR_EXIT_NETWORK_SERVER, "select() failed");
640 /* accept incoming connections */
641 #if defined(TARGET_SDL)
642 if (SDLNet_SocketReady(lfd))
646 newsock = SDLNet_TCP_Accept(lfd);
654 if (FD_ISSET(lfd, &fds))
658 slen = sizeof(saddr);
659 newfd = accept(lfd, (struct sockaddr *)&saddr, &slen);
663 Error(ERR_EXIT_NETWORK_SERVER, "accept() failed");
670 setsockopt(newfd, tcp, TCP_NODELAY, (char *)&on, sizeof(int));
678 player = first_player;
682 #if defined(TARGET_SDL)
683 if (SDLNet_SocketReady(player->fd))
685 if (FD_ISSET(player->fd, &fds))
688 #if defined(TARGET_SDL)
689 /* read only 1 byte, because SDLNet blocks when we want more than is
691 r = SDLNet_TCP_Recv(player->fd, player->readbuffer + player->nread, 1);
693 r = read(player->fd, player->readbuffer + player->nread,
694 MAX_BUFFER_SIZE - player->nread);
700 Error(ERR_NETWORK_SERVER, "EOF from client %d (%s)",
701 player->number, player->player_name);
702 RemovePlayer(player);
707 while (player->nread >= 4 && player->nread >= 4 + player->readbuffer[3])
709 len = player->readbuffer[3];
710 if (player->readbuffer[0] || player->readbuffer[1] || player->readbuffer[2])
713 Error(ERR_NETWORK_SERVER, "crap from client %d (%s)",
714 player->number, player->player_name);
715 RemovePlayer(player);
719 memcpy(buffer, &player->readbuffer[4], len);
720 player->nread -= 4 + len;
721 memmove(player->readbuffer, player->readbuffer + 4 + len, player->nread);
723 buffer[0] = player->number;
724 if (!player->introduced && buffer[1] != OP_PLAYER_NAME)
727 Error(ERR_NETWORK_SERVER, "!(client %d)->introduced && buffer[1]==%d (expected OP_PLAYER_NAME)", buffer[0], buffer[1]);
729 RemovePlayer(player);
737 Handle_OP_PLAYER_NAME(player, len);
740 case OP_PROTOCOL_VERSION:
741 Handle_OP_PROTOCOL_VERSION(player, len);
744 case OP_NUMBER_WANTED:
745 Handle_OP_NUMBER_WANTED(player);
748 case OP_START_PLAYING:
749 Handle_OP_START_PLAYING(player);
752 case OP_PAUSE_PLAYING:
753 Handle_OP_PAUSE_PLAYING(player);
756 case OP_CONTINUE_PLAYING:
757 Handle_OP_CONTINUE_PLAYING(player);
760 case OP_STOP_PLAYING:
761 Handle_OP_STOP_PLAYING(player);
765 Handle_OP_MOVE_PLAYER(player);
768 case OP_BROADCAST_MESSAGE:
771 Error(ERR_NETWORK_SERVER, "client %d (%s) sends message: %s",
772 player->number, player->player_name, &buffer[2]);
773 broadcast(player, len, 0);
778 Error(ERR_NETWORK_SERVER,
779 "unknown opcode %d from client %d (%s)",
780 buffer[0], player->number, player->player_name);
785 if (player && !interrupt)
786 player = player->next;
788 while (player && !interrupt);
792 #endif /* NETWORK_AVALIABLE */