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>
41 char name[MAXNICKLEN+2];
55 unsigned char realbuf[512], readbuf[MAX_BUFFER_SIZE], writbuf[MAX_BUFFER_SIZE];
56 unsigned char *buf = realbuf + 4;
57 int nread = 0, nwrite = 0;
74 fatal("Out of memory");
81 tm.tv_sec = i / 1000000;
82 tm.tv_usec = i % 1000000;
83 select(0, NULL, NULL, NULL, &tm);
90 write(sfd, writbuf, nwrite);
99 realbuf[0] = realbuf[1] = realbuf[2] = 0;
100 realbuf[3] = (unsigned char)len;
102 if (nwrite + 4 + len >= MAX_BUFFER_SIZE)
103 fatal("Internal error: send buffer overflow");
104 memcpy(writbuf + nwrite, realbuf, 4 + len);
114 struct user *finduser(unsigned char c)
118 for (u = &me; u; u = u->next)
122 fatal("Protocol error: reference to non-existing user");
123 return NULL; /* so that gcc -Wall doesn't complain */
126 char *get_user_name(unsigned char c)
131 return("the server");
135 for (u = &me; u; u = u->next)
136 if (u->nr == c && u->name && strlen(u->name))
142 void InitNetworkServer(int port)
147 NetworkServer(port, !serveronly);
154 "cannot create network server process - no network games");
159 /* we are parent process -- resume normal operation */
164 BOOL ConnectToServer(char *host, int port)
167 struct sockaddr_in s;
168 struct protoent *tcpproto;
173 if ((s.sin_addr.s_addr = inet_addr(host)) == -1)
175 hp = gethostbyname(host);
177 fatal("Host not found");
178 s.sin_addr = *(struct in_addr *)(hp->h_addr_list[0]);
182 s.sin_addr.s_addr = inet_addr("127.0.0.1");
187 s.sin_port = htons(port);
188 s.sin_family = AF_INET;
189 sfd = socket(PF_INET, SOCK_STREAM, 0);
191 fatal("Out of file descriptors");
192 if ((tcpproto = getprotobyname("tcp")) != NULL)
193 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
195 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) < 0)
199 printf("No rocksndiamonds server on localhost - starting up one ...\n");
201 InitNetworkServer(port);
207 sfd = socket(PF_INET, SOCK_STREAM, 0);
209 fatal("Out of file descriptors");
210 setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
211 if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0)
215 fatal("Can't connect to server");
218 fatal("Can't connect to server");
224 void SendToServer_Nickname(char *nickname)
226 static char msgbuf[300];
228 buf[1] = OP_NICKNAME;
229 memcpy(&buf[2], nickname, strlen(nickname));
230 sendbuf(2 + strlen(nickname));
231 sprintf(msgbuf, "you set your nick to \"%s\"", nickname);
235 void SendToServer_ProtocolVersion()
237 buf[1] = OP_PROTOCOL_VERSION;
238 buf[2] = PROT_VERS_1;
239 buf[3] = PROT_VERS_2;
240 buf[4] = PROT_VERS_3;
245 void SendToServer_NrWanted(int nr_wanted)
247 buf[1] = OP_NUMBER_WANTED;
253 void SendToServer_StartPlaying()
255 unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
257 buf[1] = OP_START_PLAYING;
258 buf[2] = (byte)(level_nr >> 8);
259 buf[3] = (byte)(level_nr & 0xff);
260 buf[4] = (byte)(leveldir_nr >> 8);
261 buf[5] = (byte)(leveldir_nr & 0xff);
263 buf[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
264 buf[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
265 buf[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
266 buf[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
268 strcpy(&buf[10], leveldir[leveldir_nr].name);
270 sendbuf(10 + strlen(leveldir[leveldir_nr].name)+1);
273 void SendToServer_MovePlayer(byte player_action)
275 buf[1] = OP_MOVE_FIGURE;
276 buf[2] = player_action;
281 void handlemessages()
284 struct user *u, *v = NULL;
285 static char msgbuf[300];
287 while (nread >= 4 && nread >= 4 + readbuf[3])
290 if (readbuf[0] || readbuf[1] || readbuf[2])
291 fatal("Wrong server line length");
293 memcpy(buf, &readbuf[4], len);
295 copydown(readbuf, readbuf + 4 + len, nread);
301 int new_client_nr = buf[2];
302 int new_index_nr = new_client_nr - 1;
304 printf("OP_YOUR_NUMBER: %d\n", buf[0]);
305 me.nr = new_client_nr;
307 stored_player[new_index_nr] = *local_player;
308 local_player = &stored_player[new_index_nr];
310 TestPlayer = new_index_nr;
312 if (me.nr > MAX_PLAYERS)
313 Error(ERR_EXIT, "sorry - no more than %d players", MAX_PLAYERS);
315 sprintf(msgbuf, "you get client # %d", new_client_nr);
321 case OP_NUMBER_WANTED:
323 int client_nr_wanted = buf[2];
324 int new_client_nr = buf[3];
325 int new_index_nr = new_client_nr - 1;
327 printf("OP_NUMBER_WANTED: %d\n", buf[0]);
329 if (new_client_nr != client_nr_wanted)
331 char *color[] = { "yellow", "red", "green", "blue" };
333 sprintf(msgbuf, "Sorry ! You are %s player !",
334 color[new_index_nr]);
335 Request(msgbuf, REQ_CONFIRM);
337 sprintf(msgbuf, "cannot switch -- you keep client # %d",
343 if (me.nr != client_nr_wanted)
344 sprintf(msgbuf, "switching to client # %d", new_client_nr);
346 sprintf(msgbuf, "keeping client # %d", new_client_nr);
349 me.nr = new_client_nr;
351 stored_player[new_index_nr] = *local_player;
352 local_player = &stored_player[new_index_nr];
354 TestPlayer = new_index_nr;
360 case OP_PLAYER_CONNECTED:
361 printf("OP_PLAYER_CONNECTED: %d\n", buf[0]);
362 sprintf(msgbuf, "new client %d connected", buf[0]);
365 for (u = &me; u; u = u->next)
368 Error(ERR_EXIT, "multiplayer server sent duplicate player id");
373 v->next = u = mmalloc(sizeof(struct user));
381 printf("OP_NICKNAME: %d\n", buf[0]);
382 u = finduser(buf[0]);
384 sprintf(msgbuf, "client %d calls itself \"%s\"", buf[0], &buf[2]);
386 strncpy(u->name, &buf[2], MAXNICKLEN);
390 printf("OP_GONE: %d\n", buf[0]);
391 u = finduser(buf[0]);
392 sprintf(msgbuf, "client %d (%s) disconnected",
393 buf[0], get_user_name(buf[0]));
396 for (v = &me; v; v = v->next)
403 case OP_BAD_PROTOCOL_VERSION:
404 Error(ERR_RETURN, "protocol version mismatch");
405 Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
406 buf[2], buf[3], PROT_VERS_1, PROT_VERS_2, PROT_VERS_3);
409 case OP_START_PLAYING:
411 int new_level_nr, new_leveldir_nr;
412 unsigned long new_random_seed;
413 unsigned char *new_leveldir_name;
416 if (game_status == PLAYING)
420 new_level_nr = (buf[2] << 8) + buf[3];
421 new_leveldir_nr = (buf[4] << 8) + buf[5];
423 (buf[6] << 24) | (buf[7] << 16) | (buf[8] << 8) | (buf[9]);
424 new_leveldir_name = &buf[10];
426 printf("OP_START_PLAYING: %d\n", buf[0]);
427 sprintf(msgbuf, "client %d starts game [level %d from levedir %d (%s)]\n",
435 if (strcmp(leveldir[new_leveldir_nr].name, new_leveldir_name) != 0)
436 Error(ERR_RETURN, "no such level directory: '%s'",new_leveldir_name);
438 leveldir_nr = new_leveldir_nr;
440 local_player->leveldir_nr = leveldir_nr;
441 LoadPlayerInfo(PLAYER_LEVEL);
442 SavePlayerInfo(PLAYER_SETUP);
444 level_nr = new_level_nr;
447 LoadLevelTape(level_nr);
454 TapeStartRecording();
458 tape.random_seed = new_random_seed;
460 InitRND(new_random_seed);
464 printf("tape.random_seed == %d\n", tape.random_seed);
467 game_status = PLAYING;
479 (buf[2] << 24) | (buf[3] << 16) | (buf[4] << 8) | (buf[5]);
481 if (frame_nr != FrameCounter)
483 Error(ERR_RETURN, "client and servers frame counters out of sync");
484 Error(ERR_RETURN, "frame counter of client is %d", FrameCounter);
485 Error(ERR_RETURN, "frame counter of server is %d", frame_nr);
486 Error(ERR_EXIT, "this should not happen -- please debug");
489 for (i=0; i<MAX_PLAYERS; i++)
491 if (stored_player[i].active)
492 network_player_action[i] = buf[6 + i];
495 network_player_action_received = TRUE;
497 sprintf(msgbuf, "frame %d: client %d moves player [0x%02x]",
498 FrameCounter, buf[0], buf[2]);
505 printf("OP_PAUSE: %d\n", buf[0]);
506 sprintf(msgbuf, "client %d pauses game", buf[0]);
511 printf("OP_CONT: %d\n", buf[0]);
512 sprintf(msgbuf, "client %d continues game", buf[0]);
517 printf("OP_WON: %d\n", buf[0]);
518 sprintf(msgbuf, "client %d wins the game", buf[0]);
523 printf("OP_ZERO: %d\n", buf[0]);
524 sprintf(msgbuf, "client %d resets game counters", buf[0]);
529 printf("OP_MSG: %d\n", buf[0]);
530 sprintf(msgbuf, "client %d sends message", buf[0]);
534 printf("OP_MSG: %d\n", buf[0]);
535 sprintf(msgbuf, "client %d has lost", buf[0]);
539 printf("OP_MSG: %d\n", buf[0]);
540 sprintf(msgbuf, "client %d sets level to %d", buf[0], buf[2]);
548 void HandleNetworking()
550 static struct timeval tv = { 0, 0 };
562 r = select(sfd + 1, &rfds, NULL, NULL, &tv);
564 if (r < 0 && errno != EINTR)
567 fatal("fatal: select() failed");
573 if (FD_ISSET(sfd, &rfds))
577 r = read(sfd, readbuf + nread, MAX_BUFFER_SIZE - nread);
580 fatal("Error reading from server");
582 fatal("Connection to server lost");