1 /***********************************************************
2 * Rocks'n'Diamonds -- McDuffin Strikes Back! *
3 *----------------------------------------------------------*
4 * (c) 1995-2006 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) already has # %d",
297 player->number, player->player_name, nr_wanted);
299 Error(ERR_NETWORK_SERVER,
300 "client %d (%s) cannot switch (client %d already 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 leveldir %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 Error(ERR_NETWORK_SERVER, "resetting ServerFrameCounter to 0");
393 /* reset player actions */
394 for (v = first_player; v; v = v->next)
397 v->action_received = FALSE;
400 broadcast(NULL, 10 + strlen((char *)&buffer[10])+1, 0);
403 static void Handle_OP_PAUSE_PLAYING(struct NetworkServerPlayerInfo *player)
406 Error(ERR_NETWORK_SERVER, "client %d (%s) pauses game",
407 player->number, player->player_name);
408 broadcast(NULL, 2, 0);
411 static void Handle_OP_CONTINUE_PLAYING(struct NetworkServerPlayerInfo *player)
414 Error(ERR_NETWORK_SERVER, "client %d (%s) continues game",
415 player->number, player->player_name);
416 broadcast(NULL, 2, 0);
419 static void Handle_OP_STOP_PLAYING(struct NetworkServerPlayerInfo *player)
421 int cause_for_stopping = buffer[2];
424 Error(ERR_NETWORK_SERVER, "client %d (%s) stops game [%d]",
425 player->number, player->player_name, cause_for_stopping);
426 broadcast(NULL, 3, 0);
429 static void Handle_OP_MOVE_PLAYER(struct NetworkServerPlayerInfo *player)
431 struct NetworkServerPlayerInfo *v;
432 int last_client_nr = 0;
435 /* store player action */
436 for (v = first_player; v; v = v->next)
438 if (v->number == player->number)
440 v->action = buffer[2];
441 v->action_received = TRUE;
445 /* check if server received action from each player */
446 for (v = first_player; v; v = v->next)
448 if (!v->action_received)
451 if (v->number > last_client_nr)
452 last_client_nr = v->number;
455 /* initialize all player actions to zero */
456 for (i = 0; i < last_client_nr; i++)
459 /* broadcast actions of all players to all players */
460 for (v = first_player; v; v = v->next)
462 buffer[6 + v->number-1] = v->action;
464 v->action_received = FALSE;
467 buffer[2] = (unsigned char)((ServerFrameCounter >> 24) & 0xff);
468 buffer[3] = (unsigned char)((ServerFrameCounter >> 16) & 0xff);
469 buffer[4] = (unsigned char)((ServerFrameCounter >> 8) & 0xff);
470 buffer[5] = (unsigned char)((ServerFrameCounter >> 0) & 0xff);
472 broadcast(NULL, 6 + last_client_nr, 0);
475 Error(ERR_NETWORK_SERVER, "sending ServerFrameCounter value %d",
479 ServerFrameCounter++;
482 #if defined(TARGET_SDL)
483 /* the following is not used for a standalone server;
484 the pointer points to an integer containing the port-number */
485 int NetworkServerThread(void *ptr)
487 NetworkServer(*((int *) ptr), 0);
489 /* should never be reached */
494 void NetworkServer(int port, int serveronly)
497 struct NetworkServerPlayerInfo *player;
500 #if defined(TARGET_SDL)
505 struct protoent *tcpproto;
510 #if defined(PLATFORM_UNIX) && !defined(PLATFORM_NEXT)
511 struct sigaction sact;
515 port = DEFAULT_SERVER_PORT;
520 #if !defined(TARGET_SDL)
521 if ((tcpproto = getprotobyname("tcp")) != NULL)
522 tcp = tcpproto->p_proto;
525 #if defined(PLATFORM_UNIX)
526 #if defined(PLATFORM_NEXT)
527 signal(SIGPIPE, SIG_IGN);
529 sact.sa_handler = SIG_IGN;
530 sigemptyset(&sact.sa_mask);
532 sigaction(SIGPIPE, &sact, NULL);
536 #if defined(TARGET_SDL)
538 /* assume that SDL is already initialized */
540 if (SDLNet_Init() == -1)
541 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_Init() failed");
545 if (SDLNet_ResolveHost(&ip, NULL, port) == -1)
546 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_ResolveHost() failed");
548 lfd = SDLNet_TCP_Open(&ip);
550 Error(ERR_EXIT_NETWORK_SERVER, "SDLNet_TCP_Open() failed");
552 fds = SDLNet_AllocSocketSet(MAX_PLAYERS+1);
553 SDLNet_TCP_AddSocket(fds, lfd);
557 if ((lfd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
558 Error(ERR_EXIT_NETWORK_SERVER, "socket() failed");
560 saddr.sin_family = AF_INET;
561 saddr.sin_addr.s_addr = htonl(INADDR_ANY);
562 saddr.sin_port = htons(port);
566 setsockopt(lfd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(int));
567 if (bind(lfd, (struct sockaddr *)&saddr, sizeof(saddr)) < 0)
568 Error(ERR_EXIT_NETWORK_SERVER, "bind() failed");
573 #if !defined(TARGET_SDL)
576 /* become a daemon, breaking all ties with the controlling terminal */
577 options.verbose = FALSE;
578 for (i = 0; i < 255; i++)
591 /* open a fake stdin, stdout, stderr, just in case */
592 open("/dev/null", O_RDONLY);
593 open("/dev/null", O_WRONLY);
594 open("/dev/null", O_WRONLY);
600 Error(ERR_NETWORK_SERVER, "started up, listening on port %d", port);
601 Error(ERR_NETWORK_SERVER, "using protocol version %d.%d.%d",
602 PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
609 for (player = first_player; player; player = player->next)
612 #if defined(TARGET_SDL)
613 if ((sl = SDLNet_CheckSockets(fds, 500000)) < 1)
615 Error(ERR_NETWORK_SERVER, SDLNet_GetError());
616 perror("SDLNet_CheckSockets");
623 player = first_player;
626 FD_SET(player->fd, &fds);
627 if (player->fd > mfd)
629 player = player->next;
634 if ((sl = select(mfd + 1, &fds, NULL, NULL, &tv)) < 0)
637 Error(ERR_EXIT_NETWORK_SERVER, "select() failed");
649 /* accept incoming connections */
650 #if defined(TARGET_SDL)
651 if (SDLNet_SocketReady(lfd))
655 newsock = SDLNet_TCP_Accept(lfd);
663 if (FD_ISSET(lfd, &fds))
668 slen = sizeof(saddr);
669 newfd = accept(lfd, (struct sockaddr *)&saddr, &slen);
673 Error(ERR_EXIT_NETWORK_SERVER, "accept() failed");
680 setsockopt(newfd, tcp, TCP_NODELAY, (char *)&on, sizeof(int));
688 player = first_player;
692 #if defined(TARGET_SDL)
693 if (SDLNet_SocketReady(player->fd))
695 if (FD_ISSET(player->fd, &fds))
698 #if defined(TARGET_SDL)
699 /* read only 1 byte, because SDLNet blocks when we want more than is
701 r = SDLNet_TCP_Recv(player->fd, player->readbuffer + player->nread, 1);
703 r = read(player->fd, player->readbuffer + player->nread,
704 MAX_BUFFER_SIZE - player->nread);
710 Error(ERR_NETWORK_SERVER, "EOF from client %d (%s)",
711 player->number, player->player_name);
712 RemovePlayer(player);
717 while (player->nread >= 4 && player->nread >= 4 + player->readbuffer[3])
719 len = player->readbuffer[3];
720 if (player->readbuffer[0] || player->readbuffer[1] || player->readbuffer[2])
723 Error(ERR_NETWORK_SERVER, "crap from client %d (%s)",
724 player->number, player->player_name);
725 RemovePlayer(player);
729 memcpy(buffer, &player->readbuffer[4], len);
730 player->nread -= 4 + len;
731 memmove(player->readbuffer, player->readbuffer + 4 + len, player->nread);
733 buffer[0] = player->number;
734 if (!player->introduced && buffer[1] != OP_PLAYER_NAME)
737 Error(ERR_NETWORK_SERVER, "!(client %d)->introduced && buffer[1]==%d (expected OP_PLAYER_NAME)", buffer[0], buffer[1]);
739 RemovePlayer(player);
747 Handle_OP_PLAYER_NAME(player, len);
750 case OP_PROTOCOL_VERSION:
751 Handle_OP_PROTOCOL_VERSION(player, len);
754 case OP_NUMBER_WANTED:
755 Handle_OP_NUMBER_WANTED(player);
758 case OP_START_PLAYING:
759 Handle_OP_START_PLAYING(player);
762 case OP_PAUSE_PLAYING:
763 Handle_OP_PAUSE_PLAYING(player);
766 case OP_CONTINUE_PLAYING:
767 Handle_OP_CONTINUE_PLAYING(player);
770 case OP_STOP_PLAYING:
771 Handle_OP_STOP_PLAYING(player);
775 Handle_OP_MOVE_PLAYER(player);
778 case OP_BROADCAST_MESSAGE:
781 Error(ERR_NETWORK_SERVER, "client %d (%s) sends message: %s",
782 player->number, player->player_name, &buffer[2]);
783 broadcast(player, len, 0);
788 Error(ERR_NETWORK_SERVER,
789 "unknown opcode %d from client %d (%s)",
790 buffer[0], player->number, player->player_name);
795 if (player && !interrupt)
796 player = player->next;
798 while (player && !interrupt);
802 #endif /* NETWORK_AVALIABLE */