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 *mmalloc(int n)
78 fatal("Out of memory");
82 static void u_sleep(int i)
85 tm.tv_sec = i / 1000000;
86 tm.tv_usec = i % 1000000;
87 select(0, NULL, NULL, NULL, &tm);
90 static void flushbuf()
94 write(sfd, writbuf, nwrite);
99 static void sendbuf(int len)
103 realbuf[0] = realbuf[1] = realbuf[2] = 0;
104 realbuf[3] = (unsigned char)len;
106 if (nwrite + 4 + len >= MAX_BUFFER_SIZE)
107 fatal("Internal error: send buffer overflow");
108 memcpy(writbuf + nwrite, realbuf, 4 + len);
118 struct user *finduser(unsigned char c)
122 for (u = &me; u; u = u->next)
126 fatal("Protocol error: reference to non-existing user");
127 return NULL; /* so that gcc -Wall doesn't complain */
130 char *get_user_name(unsigned char c)
135 return("the server");
139 for (u = &me; u; u = u->next)
140 if (u->nr == c && u->name && strlen(u->name))
146 static void StartNetworkServer(int port)
151 NetworkServer(port, serveronly);
158 "cannot create network server process - no network games");
163 /* we are parent process -- resume normal operation */
168 BOOL ConnectToServer(char *host, int port)
171 struct sockaddr_in s;
172 struct protoent *tcpproto;
177 if ((s.sin_addr.s_addr = inet_addr(host)) == -1)
179 hp = gethostbyname(host);
181 fatal("Host not found");
182 s.sin_addr = *(struct in_addr *)(hp->h_addr_list[0]);
186 s.sin_addr.s_addr = inet_addr("127.0.0.1");
191 s.sin_port = htons(port);
192 s.sin_family = AF_INET;
193 sfd = socket(PF_INET, SOCK_STREAM, 0);
195 fatal("Out of file descriptors");
196 if ((tcpproto = getprotobyname("tcp")) != NULL)
197 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
199 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) < 0)
203 printf("No rocksndiamonds server on localhost - starting up one ...\n");
205 StartNetworkServer(port);
211 sfd = socket(PF_INET, SOCK_STREAM, 0);
213 fatal("Out of file descriptors");
214 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
215 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0)
219 fatal("Can't connect to server");
222 fatal("Can't connect to server");
228 void SendToServer_Nickname(char *nickname)
230 static char msgbuf[300];
232 buf[1] = OP_NICKNAME;
233 memcpy(&buf[2], nickname, strlen(nickname));
234 sendbuf(2 + strlen(nickname));
235 sprintf(msgbuf, "you set your nick to \"%s\"", nickname);
239 void SendToServer_ProtocolVersion()
241 buf[1] = OP_PROTOCOL_VERSION;
242 buf[2] = PROT_VERS_1;
243 buf[3] = PROT_VERS_2;
244 buf[4] = PROT_VERS_3;
249 void SendToServer_NrWanted(int nr_wanted)
251 buf[1] = OP_NUMBER_WANTED;
257 void SendToServer_StartPlaying()
259 unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
261 buf[1] = OP_START_PLAYING;
262 buf[2] = (byte)(level_nr >> 8);
263 buf[3] = (byte)(level_nr & 0xff);
264 buf[4] = (byte)(leveldir_nr >> 8);
265 buf[5] = (byte)(leveldir_nr & 0xff);
267 buf[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
268 buf[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
269 buf[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
270 buf[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
272 strcpy(&buf[10], leveldir[leveldir_nr].name);
274 sendbuf(10 + strlen(leveldir[leveldir_nr].name)+1);
277 void SendToServer_PausePlaying()
279 buf[1] = OP_PAUSE_PLAYING;
284 void SendToServer_ContinuePlaying()
286 buf[1] = OP_CONTINUE_PLAYING;
291 void SendToServer_StopPlaying()
293 buf[1] = OP_STOP_PLAYING;
298 void SendToServer_MovePlayer(byte player_action)
300 buf[1] = OP_MOVE_FIGURE;
301 buf[2] = player_action;
306 static void Handle_OP_BAD_PROTOCOL_VERSION()
308 Error(ERR_RETURN, "protocol version mismatch");
309 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
310 buf[2], buf[3], PROT_VERS_1, PROT_VERS_2, PROT_VERS_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;
329 old_local_player->local = FALSE;
331 local_player = new_local_player;
334 TestPlayer = new_index_nr;
336 if (me.nr > MAX_PLAYERS)
337 Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS);
339 sprintf(msgbuf, "you get client # %d", new_client_nr);
343 static void Handle_OP_NUMBER_WANTED()
345 int client_nr_wanted = buf[2];
346 int old_client_nr = buf[0];
347 int new_client_nr = buf[3];
348 int old_index_nr = old_client_nr - 1;
349 int new_index_nr = new_client_nr - 1;
350 int index_nr_wanted = client_nr_wanted - 1;
351 struct PlayerInfo *old_player = &stored_player[old_index_nr];
352 struct PlayerInfo *new_player = &stored_player[new_index_nr];
354 printf("OP_NUMBER_WANTED: %d\n", buf[0]);
356 if (new_client_nr == client_nr_wanted) /* switching succeeded */
360 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
362 sprintf(msgbuf, "client %d switches to # %d",
363 old_client_nr, new_client_nr);
366 else if (old_client_nr == me.nr) /* local player keeps his nr */
368 sprintf(msgbuf, "keeping client # %d", new_client_nr);
372 if (old_client_nr != new_client_nr)
374 /* copy existing player settings and change to new player */
376 *new_player = *old_player;
377 old_player->connected = FALSE;
378 old_player->local = FALSE;
381 u = finduser(old_client_nr);
382 u->nr = new_client_nr;
384 if (old_client_nr == local_player->client_nr) /* local player switched */
385 local_player = new_player;
389 TestPlayer = new_index_nr;
391 else if (old_client_nr == me.nr) /* failed -- local player? */
393 char *color[] = { "yellow", "red", "green", "blue" };
395 sprintf(msgbuf, "Sorry ! %s player still exists ! You are %s player !",
396 color[index_nr_wanted], color[new_index_nr]);
397 Request(msgbuf, REQ_CONFIRM);
399 sprintf(msgbuf, "cannot switch -- you keep client # %d",
405 static void Handle_OP_NICKNAME(unsigned int len)
409 printf("OP_NICKNAME: %d\n", buf[0]);
410 u = finduser(buf[0]);
412 sprintf(msgbuf, "client %d calls itself \"%s\"", buf[0], &buf[2]);
414 strncpy(u->name, &buf[2], MAXNICKLEN);
417 static void Handle_OP_PLAYER_CONNECTED()
419 struct user *u, *v = NULL;
420 int new_client_nr = buf[0];
421 int new_index_nr = new_client_nr - 1;
423 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
424 sprintf(msgbuf, "new client %d connected", new_client_nr);
427 for (u = &me; u; u = u->next)
429 if (u->nr == new_client_nr)
430 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
435 v->next = u = mmalloc(sizeof(struct user));
436 u->nr = new_client_nr;
440 stored_player[new_index_nr].connected = TRUE;
443 static void Handle_OP_PLAYER_DISCONNECTED()
447 printf("OP_PLAYER_DISCONNECTED: %d\n", buf[0]);
448 u = finduser(buf[0]);
449 sprintf(msgbuf, "client %d (%s) disconnected",
450 buf[0], get_user_name(buf[0]));
453 for (v = &me; v; v = v->next)
459 static void Handle_OP_START_PLAYING()
461 int new_level_nr, new_leveldir_nr;
462 unsigned long new_random_seed;
463 unsigned char *new_leveldir_name;
466 if (game_status == PLAYING)
470 new_level_nr = (buf[2] << 8) + buf[3];
471 new_leveldir_nr = (buf[4] << 8) + buf[5];
473 (buf[6] << 24) | (buf[7] << 16) | (buf[8] << 8) | (buf[9]);
474 new_leveldir_name = &buf[10];
476 printf("OP_START_PLAYING: %d\n", buf[0]);
477 sprintf(msgbuf, "client %d starts game [level %d from levedir %d (%s)]\n",
485 if (strcmp(leveldir[new_leveldir_nr].name, new_leveldir_name) != 0)
486 Error(ERR_RETURN, "no such level directory: '%s'",new_leveldir_name);
488 leveldir_nr = new_leveldir_nr;
490 local_player->leveldir_nr = leveldir_nr;
491 LoadPlayerInfo(PLAYER_LEVEL);
492 SavePlayerInfo(PLAYER_SETUP);
494 level_nr = new_level_nr;
497 LoadLevelTape(level_nr);
505 TapeStartRecording();
510 tape.random_seed = new_random_seed;
512 InitRND(new_random_seed);
516 printf("tape.random_seed == %d\n", tape.random_seed);
519 game_status = PLAYING;
523 static void Handle_OP_PAUSE_PLAYING()
525 printf("OP_PAUSE_PLAYING: %d\n", buf[0]);
526 sprintf(msgbuf, "client %d pauses game", buf[0]);
530 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
533 static void Handle_OP_CONTINUE_PLAYING()
535 printf("OP_CONTINUE_PLAYING: %d\n", buf[0]);
536 sprintf(msgbuf, "client %d continues game", buf[0]);
539 tape.pausing = FALSE;
540 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
543 static void Handle_OP_STOP_PLAYING()
545 printf("OP_STOP_PLAYING: %d\n", buf[0]);
546 sprintf(msgbuf, "client %d stops game", buf[0]);
549 game_status = MAINMENU;
553 static void Handle_OP_MOVE_FIGURE(unsigned int len)
558 if (!network_playing)
562 (buf[2] << 24) | (buf[3] << 16) | (buf[4] << 8) | (buf[5]);
564 if (frame_nr != FrameCounter)
566 Error(ERR_RETURN, "client and servers frame counters out of sync");
567 Error(ERR_RETURN, "frame counter of client is %d", FrameCounter);
568 Error(ERR_RETURN, "frame counter of server is %d", frame_nr);
569 Error(ERR_EXIT, "this should not happen -- please debug");
572 /* copy valid player actions */
573 for (i=0; i<MAX_PLAYERS; i++)
574 network_player_action[i] =
575 (i < len - 6 && stored_player[i].active ? buf[6 + i] : 0);
577 network_player_action_received = TRUE;
580 sprintf(msgbuf, "frame %d: client %d moves player [0x%02x]",
581 FrameCounter, buf[0], buf[2]);
586 static void handlemessages()
590 while (nread >= 4 && nread >= 4 + readbuf[3])
593 if (readbuf[0] || readbuf[1] || readbuf[2])
594 fatal("Wrong server line length");
596 memcpy(buf, &readbuf[4], len);
598 copydown(readbuf, readbuf + 4 + len, nread);
602 case OP_BAD_PROTOCOL_VERSION:
603 Handle_OP_BAD_PROTOCOL_VERSION();
607 Handle_OP_YOUR_NUMBER();
610 case OP_NUMBER_WANTED:
611 Handle_OP_NUMBER_WANTED();
615 Handle_OP_NICKNAME(len);
618 case OP_PLAYER_CONNECTED:
619 Handle_OP_PLAYER_CONNECTED();
622 case OP_PLAYER_DISCONNECTED:
623 Handle_OP_PLAYER_DISCONNECTED();
626 case OP_START_PLAYING:
627 Handle_OP_START_PLAYING();
630 case OP_PAUSE_PLAYING:
631 Handle_OP_PAUSE_PLAYING();
634 case OP_CONTINUE_PLAYING:
635 Handle_OP_CONTINUE_PLAYING();
638 case OP_STOP_PLAYING:
639 Handle_OP_STOP_PLAYING();
643 Handle_OP_MOVE_FIGURE(len);
647 printf("OP_WON: %d\n", buf[0]);
648 sprintf(msgbuf, "client %d wins the game", buf[0]);
653 printf("OP_ZERO: %d\n", buf[0]);
654 sprintf(msgbuf, "client %d resets game counters", buf[0]);
659 printf("OP_MSG: %d\n", buf[0]);
660 sprintf(msgbuf, "client %d sends message", buf[0]);
664 printf("OP_MSG: %d\n", buf[0]);
665 sprintf(msgbuf, "client %d has lost", buf[0]);
669 printf("OP_MSG: %d\n", buf[0]);
670 sprintf(msgbuf, "client %d sets level to %d", buf[0], buf[2]);
678 void HandleNetworking()
680 static struct timeval tv = { 0, 0 };
689 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
691 if (r < 0 && errno != EINTR)
694 fatal("fatal: select() failed");
700 if (FD_ISSET(sfd, &rfds))
704 r = read(sfd, readbuf + nread, MAX_BUFFER_SIZE - nread);
707 fatal("Error reading from server");
709 fatal("Connection to server lost");