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];
230 buf[1] = OP_NICKNAME;
231 memcpy(&buf[2], nickname, strlen(nickname));
232 sendbuf(2 + strlen(nickname));
233 sprintf(msgbuf, "you set your nick to \"%s\"", nickname);
237 void SendToServer_ProtocolVersion()
239 buf[1] = OP_PROTOCOL_VERSION;
240 buf[2] = PROT_VERS_1;
241 buf[3] = PROT_VERS_2;
242 buf[4] = PROT_VERS_3;
247 void SendToServer_NrWanted(int nr_wanted)
249 buf[1] = OP_NUMBER_WANTED;
255 void SendToServer_StartPlaying()
257 unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
259 buf[1] = OP_START_PLAYING;
260 buf[2] = (byte)(level_nr >> 8);
261 buf[3] = (byte)(level_nr & 0xff);
262 buf[4] = (byte)(leveldir_nr >> 8);
263 buf[5] = (byte)(leveldir_nr & 0xff);
265 buf[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
266 buf[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
267 buf[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
268 buf[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
270 strcpy(&buf[10], leveldir[leveldir_nr].name);
272 sendbuf(10 + strlen(leveldir[leveldir_nr].name)+1);
275 void SendToServer_PausePlaying()
277 buf[1] = OP_PAUSE_PLAYING;
282 void SendToServer_ContinuePlaying()
284 buf[1] = OP_CONTINUE_PLAYING;
289 void SendToServer_StopPlaying()
291 buf[1] = OP_STOP_PLAYING;
296 void SendToServer_MovePlayer(byte player_action)
298 buf[1] = OP_MOVE_FIGURE;
299 buf[2] = player_action;
304 static void Handle_OP_BAD_PROTOCOL_VERSION()
306 Error(ERR_WARN, "protocol version mismatch");
307 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
308 buf[2], buf[3], PROT_VERS_1, PROT_VERS_2, PROT_VERS_3);
311 static void Handle_OP_YOUR_NUMBER()
313 int new_client_nr = buf[2];
314 int new_index_nr = new_client_nr - 1;
315 struct PlayerInfo *old_local_player = local_player;
316 struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
318 printf("OP_YOUR_NUMBER: %d\n", buf[0]);
319 me.nr = new_client_nr;
321 if (old_local_player != new_local_player)
323 /* copy existing player settings and change to new player */
325 *new_local_player = *old_local_player;
326 old_local_player->connected = FALSE;
328 local_player = new_local_player;
331 TestPlayer = new_index_nr;
333 if (me.nr > MAX_PLAYERS)
334 Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS);
336 sprintf(msgbuf, "you get client # %d", new_client_nr);
340 static void Handle_OP_NUMBER_WANTED()
342 int client_nr_wanted = buf[2];
343 int old_client_nr = buf[0];
344 int new_client_nr = buf[3];
345 int old_index_nr = old_client_nr - 1;
346 int new_index_nr = new_client_nr - 1;
347 int index_nr_wanted = client_nr_wanted - 1;
348 struct PlayerInfo *old_player = &stored_player[old_index_nr];
349 struct PlayerInfo *new_player = &stored_player[new_index_nr];
351 printf("OP_NUMBER_WANTED: %d\n", buf[0]);
353 if (new_client_nr == client_nr_wanted) /* switching succeeded */
357 if (old_client_nr != client_nr_wanted) /* client's nr has changed */
359 sprintf(msgbuf, "client %d switches to # %d",
360 old_client_nr, new_client_nr);
363 else if (old_client_nr == me.nr) /* local player keeps his nr */
365 sprintf(msgbuf, "keeping client # %d", new_client_nr);
369 if (old_client_nr != new_client_nr)
371 /* copy existing player settings and change to new player */
373 *new_player = *old_player;
374 old_player->connected = FALSE;
377 u = finduser(old_client_nr);
378 u->nr = new_client_nr;
380 if (old_player == local_player) /* local player switched */
381 local_player = new_player;
384 TestPlayer = new_index_nr;
386 else if (old_client_nr == me.nr) /* failed -- local player? */
388 char *color[] = { "yellow", "red", "green", "blue" };
390 sprintf(msgbuf, "Sorry ! %s player still exists ! You are %s player !",
391 color[index_nr_wanted], color[new_index_nr]);
392 Request(msgbuf, REQ_CONFIRM);
394 sprintf(msgbuf, "cannot switch -- you keep client # %d",
400 static void Handle_OP_NICKNAME(unsigned int len)
404 printf("OP_NICKNAME: %d\n", buf[0]);
405 u = finduser(buf[0]);
407 sprintf(msgbuf, "client %d calls itself \"%s\"", buf[0], &buf[2]);
409 strncpy(u->name, &buf[2], MAXNICKLEN);
412 static void Handle_OP_PLAYER_CONNECTED()
414 struct user *u, *v = NULL;
415 int new_client_nr = buf[0];
416 int new_index_nr = new_client_nr - 1;
418 printf("OP_PLAYER_CONNECTED: %d\n", new_client_nr);
419 sprintf(msgbuf, "new client %d connected", new_client_nr);
422 for (u = &me; u; u = u->next)
424 if (u->nr == new_client_nr)
425 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
430 v->next = u = checked_malloc(sizeof(struct user));
431 u->nr = new_client_nr;
435 stored_player[new_index_nr].connected = TRUE;
438 static void Handle_OP_PLAYER_DISCONNECTED()
442 printf("OP_PLAYER_DISCONNECTED: %d\n", buf[0]);
443 u = finduser(buf[0]);
444 sprintf(msgbuf, "client %d (%s) disconnected",
445 buf[0], get_user_name(buf[0]));
448 for (v = &me; v; v = v->next)
454 static void Handle_OP_START_PLAYING()
456 int new_level_nr, new_leveldir_nr;
457 unsigned long new_random_seed;
458 unsigned char *new_leveldir_name;
461 if (game_status == PLAYING)
465 new_level_nr = (buf[2] << 8) + buf[3];
466 new_leveldir_nr = (buf[4] << 8) + buf[5];
468 (buf[6] << 24) | (buf[7] << 16) | (buf[8] << 8) | (buf[9]);
469 new_leveldir_name = &buf[10];
471 printf("OP_START_PLAYING: %d\n", buf[0]);
472 sprintf(msgbuf, "client %d starts game [level %d from levedir %d (%s)]\n",
480 if (strcmp(leveldir[new_leveldir_nr].name, new_leveldir_name) != 0)
481 Error(ERR_WARN, "no such level directory: '%s'",new_leveldir_name);
483 leveldir_nr = new_leveldir_nr;
486 local_player->leveldir_nr = leveldir_nr;
495 LoadPlayerInfo(PLAYER_LEVEL);
496 SavePlayerInfo(PLAYER_SETUP);
500 level_nr = new_level_nr;
513 if (setup.autorecord)
514 TapeStartRecording();
519 tape.random_seed = new_random_seed;
521 InitRND(new_random_seed);
525 printf("tape.random_seed == %d\n", tape.random_seed);
528 game_status = PLAYING;
532 static void Handle_OP_PAUSE_PLAYING()
534 printf("OP_PAUSE_PLAYING: %d\n", buf[0]);
535 sprintf(msgbuf, "client %d pauses game", buf[0]);
539 DrawVideoDisplay(VIDEO_STATE_PAUSE_ON,0);
542 static void Handle_OP_CONTINUE_PLAYING()
544 printf("OP_CONTINUE_PLAYING: %d\n", buf[0]);
545 sprintf(msgbuf, "client %d continues game", buf[0]);
548 tape.pausing = FALSE;
549 DrawVideoDisplay(VIDEO_STATE_PAUSE_OFF,0);
552 static void Handle_OP_STOP_PLAYING()
554 printf("OP_STOP_PLAYING: %d\n", buf[0]);
555 sprintf(msgbuf, "client %d stops game", buf[0]);
558 game_status = MAINMENU;
562 static void Handle_OP_MOVE_FIGURE(unsigned int len)
567 if (!network_playing)
571 (buf[2] << 24) | (buf[3] << 16) | (buf[4] << 8) | (buf[5]);
573 if (frame_nr != FrameCounter)
575 Error(ERR_RETURN, "client and servers frame counters out of sync");
576 Error(ERR_RETURN, "frame counter of client is %d", FrameCounter);
577 Error(ERR_RETURN, "frame counter of server is %d", frame_nr);
578 Error(ERR_EXIT, "this should not happen -- please debug");
581 /* copy valid player actions */
582 for (i=0; i<MAX_PLAYERS; i++)
583 stored_player[i].effective_action =
584 (i < len - 6 && stored_player[i].active ? buf[6 + i] : 0);
586 network_player_action_received = TRUE;
589 sprintf(msgbuf, "frame %d: client %d moves player [0x%02x]",
590 FrameCounter, buf[0], buf[2]);
595 static void HandleNetworkingMessages()
599 while (nread >= 4 && nread >= 4 + readbuf[3])
602 if (readbuf[0] || readbuf[1] || readbuf[2])
603 Error(ERR_EXIT, "wrong network server line length");
605 memcpy(buf, &readbuf[4], len);
607 memmove(readbuf, readbuf + 4 + len, nread);
611 case OP_BAD_PROTOCOL_VERSION:
612 Handle_OP_BAD_PROTOCOL_VERSION();
616 Handle_OP_YOUR_NUMBER();
619 case OP_NUMBER_WANTED:
620 Handle_OP_NUMBER_WANTED();
624 Handle_OP_NICKNAME(len);
627 case OP_PLAYER_CONNECTED:
628 Handle_OP_PLAYER_CONNECTED();
631 case OP_PLAYER_DISCONNECTED:
632 Handle_OP_PLAYER_DISCONNECTED();
635 case OP_START_PLAYING:
636 Handle_OP_START_PLAYING();
639 case OP_PAUSE_PLAYING:
640 Handle_OP_PAUSE_PLAYING();
643 case OP_CONTINUE_PLAYING:
644 Handle_OP_CONTINUE_PLAYING();
647 case OP_STOP_PLAYING:
648 Handle_OP_STOP_PLAYING();
652 Handle_OP_MOVE_FIGURE(len);
656 printf("OP_WON: %d\n", buf[0]);
657 sprintf(msgbuf, "client %d wins the game", buf[0]);
662 printf("OP_ZERO: %d\n", buf[0]);
663 sprintf(msgbuf, "client %d resets game counters", buf[0]);
668 printf("OP_MSG: %d\n", buf[0]);
669 sprintf(msgbuf, "client %d sends message", buf[0]);
673 printf("OP_MSG: %d\n", buf[0]);
674 sprintf(msgbuf, "client %d has lost", buf[0]);
678 printf("OP_MSG: %d\n", buf[0]);
679 sprintf(msgbuf, "client %d sets level to %d", buf[0], buf[2]);
687 void HandleNetworking()
689 static struct timeval tv = { 0, 0 };
698 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
700 if (r < 0 && errno != EINTR)
701 Error(ERR_EXIT, "HandleNetworking(): select() failed");
706 if (FD_ISSET(sfd, &rfds))
710 r = read(sfd, readbuf + nread, MAX_BUFFER_SIZE - nread);
713 Error(ERR_EXIT, "error reading from network server");
716 Error(ERR_EXIT, "connection to network server lost");
720 HandleNetworkingMessages();