2 * Netris -- A free networked version of T*tris
3 * Copyright (C) 1994,1995,1996 Mark H. Weaver <mhw@netris.org>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 * $Id: game.c,v 1.39 1999/05/16 06:56:27 mhw Exp $
28 #include <sys/types.h>
29 #include <netinet/in.h>
31 #include <sys/socket.h>
38 #define HEADER_SIZE sizeof(netint4[3])
40 static struct option options[] = {
41 { "wait", 0, 0, 'w' },
42 { "port", 1, 0, 'p' },
43 { "quadra", 1, 0, 'q' },
44 { "min-players", 1, 0, 'm' },
45 { "max-players", 1, 0, 'x' },
46 { "continuous", 1, 0, 'c' },
47 { "speed", 1, 0, 'i' },
48 { "seed", 1, 0, 's' },
49 { "verbose", 0, 0, 'v' },
50 { "info", 0, 0, 'H' },
51 { "help", 0, 0, 'h' },
55 static char minplayers = 2;
56 static char maxplayers = 8;
57 static char playercount;
58 static char verbose = 0;
60 struct sockaddr_in addr;
62 MyEventType NetGenFunc(EventGenRec *gen, MyEvent *event);
63 static EventGenRec netGen[MAX_SCREENS] = {
64 { NULL, 0, FT_read, -1, NetGenFunc, EM_net, 0, "\0", 0, HEADER_SIZE }
67 static MyEventType AlarmGenFunc(EventGenRec *gen, MyEvent *event);
68 static EventGenRec alarmGen = {
69 &alarmGen, 0, FT_read, -1, AlarmGenFunc, EM_alarm
72 static MyEventType ConnGenFunc(EventGenRec *gen, MyEvent *event);
73 static EventGenRec connGen = {
74 NULL, 0, FT_read, -1, ConnGenFunc, EM_connect
77 static EventGenRec *nextGen = &alarmGen;
79 static sigjmp_buf close_env;
82 void SendPacketTo(short playa, short uid, NetPacketType type, int size, void *data)
86 if (netGen[playa].fd >= 0) {
88 fprintf(stderr, ": send %d from %d to %d\n", type, uid, playa);
89 header[0] = hton4(uid);
90 header[1] = hton4(type);
91 header[2] = hton4(size + HEADER_SIZE);
92 if (MyWrite(netGen[playa].fd, header, HEADER_SIZE) != HEADER_SIZE)
93 die("write (header)");
94 if (size > 0 && data && MyWrite(netGen[playa].fd, data, size) != size)
99 static MyEventType AlarmGenFunc(EventGenRec *gen, MyEvent *event)
104 void SCloseNet(short playa)
105 { //kick some connection's ass!
108 if (netGen[playa].fd >= 0) {
109 if (Players[playa].alive >= 0) {
110 SendPacketTo(playa, 0, NP_endConn, 0, NULL);
111 do {} while (WaitMyEvent(&event, EM_net) != E_lostConn);
112 } //say bye to player
113 close(netGen[playa].fd);
114 netGen[playa].fd = -1;
116 if (netGen[playa].next)
117 RemoveEventGen(&netGen[playa]);
121 { //nou oogjes dicht en snaveltjes toe
124 fprintf(stderr, "- Closing connections...\n");
125 for (i = 1; i < MAX_SCREENS; i++)
126 SCloseNet(i); //bye everybuddy
127 fprintf(stderr, "* All Done\n\n");
130 MyEventType NetGenFunc(EventGenRec *gen, MyEvent *event)
133 short uid, type, size;
134 netint4 *data = (netint4*)&(gen->buf);
136 result = MyRead(gen->fd, gen->buf + gen->bufSize,
137 gen->bufGoal - gen->bufSize);
139 fprintf(stderr, "- Closed connection to player #%d\n", gen->player);
142 gen->bufSize += result;
143 if (gen->bufSize < gen->bufGoal)
145 // *ugly* memcpy(data, gen->buf, sizeof(data));
146 uid = ntoh4(data[0]);
147 type = ntoh4(data[1]);
148 size = ntoh4(data[2]);
150 if (gen->bufSize < gen->bufGoal)
153 gen->bufGoal = HEADER_SIZE;
154 event->u.net.sender = gen->player;
155 event->u.net.uid = uid;
156 event->u.net.type = type;
157 event->u.net.size = size - HEADER_SIZE;
158 event->u.net.data = gen->buf + HEADER_SIZE;
159 if (type == NP_endConn) {
160 fprintf(stderr, "- Quit player #%d\n", gen->player);
162 } //client sent quit signal
167 static MyEventType ConnGenFunc(EventGenRec *gen, MyEvent *event)
173 addrLen = sizeof(addr);
174 for (new = 1; new <= MAX_SCREENS; new++)
175 if (netGen[new].fd < 0) break;
176 if (new > maxplayers) return;
178 if ((netGen[new].fd =
179 accept(gen->fd, (struct sockaddr *)&addr, &addrLen)) < 0)
181 fprintf(stderr, "+ Connection: %s\n", inet_ntoa(addr.sin_addr));
184 setsockopt(netGen[new].fd, SOL_SOCKET, SO_LINGER,(void *)&val2,
186 AddEventGen(&netGen[new]);
187 netGen[new].player = event->u.net.uid = new;
188 { //new connection; netGen already initialized in GenFunc
189 struct hostent *host;
191 sprintf(Players[new].host, "%s", inet_ntoa(addr.sin_addr));
192 if (addr.sin_family == AF_INET) {
193 host = gethostbyaddr((void *)&addr.sin_addr,
194 sizeof(struct in_addr), AF_INET);
196 strncpy(Players[new].host, host->h_name,
197 sizeof(Players[new].host) - 1);
198 Players[new].host[sizeof(Players[new].host) - 1] = 0;
199 } //set player's hostname
205 void CountPlayers(void)
206 { //count number of players/teams
209 for (i = 1; i < MAX_SCREENS; i++) if (Players[i].alive > 0) {
210 if (Players[i].team < 128) for (j = 1; j < i; j++)
211 if (Players[j].alive > 0 && (Players[j].team == Players[i].team)) {
214 } //player of same team counted before
219 int StartServer(void)
222 netint2 currentpiece[MAX_SCREENS];
223 int playersReady = 0;
226 char teams[10][7] = {
227 "", "Green", "Cyan", "Blue", "Purple",
228 "Red", "Grey", "White", "*Orange"
232 switch (WaitMyEvent(&event, EM_any)) {
233 case E_lostConn: //client went away :(
234 Players[event.u.net.sender].alive = -1;
235 for (i = 1; i < MAX_SCREENS; i++)
236 if (Players[i].alive >= 0)
237 SendPacketTo(i, event.u.net.sender,
238 NP_part, sizeof(Players[0].alive),
239 &Players[event.u.net.sender].alive);
240 SCloseNet(event.u.net.sender);
243 if (verbose) fprintf(stderr, ": %d sent %d\n",
244 netGen[event.u.net.sender].fd, event.u.net.type);
245 switch(event.u.net.type) {
247 // if (event.u.net.type != NP_hello) ByeClient(new);
249 netint4 versiondata[2];
254 memcpy(versiondata, event.u.net.data,
255 sizeof(versiondata));
256 major = ntoh4(versiondata[0]);
257 protocolVersion = ntoh4(versiondata[1]);
258 if (major != MAJOR_VERSION
259 || protocolVersion != PROTOCOL_VERSION) {
260 snprintf(data, sizeof(data),
261 "Version mismatch: received %d.%d",
262 major, protocolVersion);
263 fprintf(stderr, "= Wrong version player #%d (%s)\n",
264 event.u.net.sender, data);
265 SendPacketTo(event.u.net.sender, 0, NP_error,
266 strlen(data)+1, data);
267 SCloseNet(event.u.net.sender);
269 fprintf(stderr, "* Accepted player #%d\n",
274 //receive player details and return other players
275 memcpy(&Players[event.u.net.sender],
276 event.u.net.data, event.u.net.size);
277 if (Players[event.u.net.sender].team < 1
278 || Players[event.u.net.sender].team > 7) {
281 for (team = 1; team < 7; team++) {
282 for (i = 1; i < MAX_SCREENS; i++)
283 if ((Players[i].alive > 0) && (Players[i].team == team))
285 if (i==MAX_SCREENS) break;
287 Players[event.u.net.sender].team = team;
288 SendPacketTo(event.u.net.sender, event.u.net.sender, NP_team,
289 sizeof(Players[event.u.net.sender].team),
290 &Players[event.u.net.sender].team);
292 if (Game.started < 2)
293 Players[event.u.net.sender].flags |= SCF_paused;
294 if (!Game.continuous && Game.started >= 2) {
296 strcpy(data, "Can't join: Game has already started");
297 fprintf(stderr, "- Can't join player #%d in "
298 "non-continuous game\n", event.u.net.sender);
299 SendPacketTo(event.u.net.sender, 0, NP_error,
300 strlen(data)+1, data);
301 // SCloseNet(event.u.net.sender, 0);
303 } //can't join started game
314 memcpy(&data, &Players[event.u.net.sender].flags,
315 sizeof(data.playerflags));
316 memcpy(&data.gravity, &Game,
317 sizeof(data) - sizeof(data.playerflags));
318 SendPacketTo(event.u.net.sender, 0, NP_gamedata,
319 sizeof(data), &data);
320 } //send game options
321 for (i = 1; i < MAX_SCREENS; i++)
322 if (netGen[i].fd >= 0 && i != event.u.net.sender) {
323 SendPacketTo(event.u.net.sender, i,
324 NP_newPlayer, sizeof(_Player), &Players[i]);
325 SendPacketTo(event.u.net.sender, i, NP_newPiece,
326 sizeof(Players[i].curShape), &Players[i].curShape);
327 SendPacketTo(i, event.u.net.sender, NP_newPlayer,
328 sizeof(_Player), &Players[event.u.net.sender]);
329 } //send (to) players
330 fprintf(stderr, "> Joined player #%d: %s <%s> (%s)\n",
332 Players[event.u.net.sender].name,
333 Players[event.u.net.sender].host,
334 teams[Players[event.u.net.sender].team]);
335 if (++playersReady >= minplayers) {
336 if (Game.started > 1)
337 SendPacketTo(event.u.net.sender, 0,
340 fprintf(stderr, "* Starting game (%010d)\n",
342 for (i = 1; i < MAX_SCREENS; i++)
343 SendPacketTo(i, 0, NP_start, 0, NULL);
345 } //first goahead (to all)*/
347 break; //NP_playerdata
349 memcpy(&Players[event.u.net.sender].curShape,
350 event.u.net.data, sizeof(Players[0].curShape));
353 Players[event.u.net.sender].alive = 0;
354 fprintf(stderr, "< Player #%d died\n",
356 //check for unpaused game
359 Players[event.u.net.sender].flags ^= SCF_paused;
360 paused = Game.started < 1;
361 for (i = 1; i < MAX_SCREENS; i++)
362 if (Players[i].alive > 0)
363 paused |= Players[i].flags & SCF_paused;
364 fprintf(stderr, "* Player #%d (un)paused (pause=%d)\n",
365 event.u.net.sender, paused);
366 if (paused) paused = 1;
369 default: //relay data to all players
371 // if (event.u.net.type >= NP_pause)
372 if (event.u.net.type >= NP_rotright
375 for (i = 1; i < MAX_SCREENS; i++)
376 if (i != event.u.net.sender)
377 if (event.u.net.type != NP_giveJunk ||
378 Players[i].team != Players[event.u.net.sender].team)
379 SendPacketTo(i, event.u.net.sender,
380 event.u.net.type, event.u.net.size,
386 { //new connection; netGen already initialized in GenFunc
387 char serverdata[255];
389 sprintf(serverdata, "Netris server %s", version_string);
390 SendPacketTo(event.u.net.uid, event.u.net.uid, NP_hello,
391 strlen(serverdata)+1, serverdata);
396 if (Game.started < 1) {
397 if (playercount > 1) {
398 fprintf(stderr, "* Game (%010d) ready to start\n", Game.seed);
401 } //game not yet started
403 if (playercount < 2) {
404 fprintf(stderr, "* Stopping game\n");
405 if (Game.seed) Game.seed++;
406 if (Game.started > 1) for (i = 1; i < MAX_SCREENS; i++)
407 if (Players[i].alive >= 0) {
408 Players[i].alive = 1;
409 Players[i].flags |= SCF_paused;
410 SendPacketTo(i, 0, NP_stop,
411 sizeof(Game.seed), &Game.seed);
412 } //transmit game stop and set players not ready
415 } //too few players for game
416 if (Game.started == 1 && !paused) {
418 fprintf(stderr, "* Game starts\n");
419 for (i = 1; i < MAX_SCREENS; i++)
420 if (Players[i].alive > 0)
421 SendPacketTo(i, 0, NP_start, 0, NULL);
422 } //everybody ready to start
423 } //game (ready to) start(ed)
425 fprintf(stderr, "* Exiting server\n");
432 "NETRIS Server %s\t(c) 2002 Shiar <shiar@shiar.org>\n\n",
440 "Usage: netris <options>\n"
442 " -h, --help\t\tPrint this usage information\n"
443 " -H, --info\t\tShow distribution and warranty information\n"
445 " -p, --port <port>\tSet port number (default is %d)\n"
447 " -s, --seed <seed>\tStart with given random seed\n"
448 " -i, --speed <sec>\tSet the initial step-down interval, in seconds\n"
449 " -m, --min-players <2>\tNumber of players required before starting the game\n"
450 " -x, --max-players <8>\tMaximum number of players allowed in the game\n"
451 " -c, --continuous\tDon'n quit the game\n"
459 file_out = fopen(CONFIG_FILE, "w");
460 if (file_out == NULL) {
461 perror("Error writing config file");
465 fprintf(file_out, "### NETRIS %s Config file ###\n\n", version_string);
468 fprintf(stderr, "Wrote new game configuration to %s\n", CONFIG_FILE);
471 void HandleOption(char tag, char *value)
480 case 'c': //min-players
481 Game.continuous = atoi(value);
483 case 'm': //min-players
484 minplayers = atoi(value);
486 case 'x': //max-players
487 maxplayers = atoi(value);
488 if (maxplayers >= MAX_SCREENS)
489 maxplayers = MAX_SCREENS;
491 case 'q': //quadra-style gravity
494 case 'i': //speed (of level 1)
495 Game.initspeed = atof(value) * 1e6;
498 Game.seed = atoi(value);
510 void ReadConf(char *filename)
516 char tag[81], value[81];
518 file_in = fopen(filename, "r");
520 while (fgets(buf, 512, file_in) != NULL) {
521 if ((ch = strchr(buf, '#')))
522 *ch = '\0'; // truncate string from # char
523 for (i = strlen(buf)-1; i >= 0; i--)
524 if (buf[i] == ' ' || buf[i] == '\t'
525 || buf[i] == '\n' || buf[i] == 13)
529 sscanf(buf, "%80[^= \t] = %80[^\n]", tag, value);
530 for (i = 0; options[i].name; i++){
531 if (!strcasecmp(options[i].name, tag)) {
532 HandleOption(options[i].val, value);
540 fprintf(stderr, "Unable to open config file %s.\n", filename);
545 void CatchInt(int sig)
547 siglongjmp(close_env, 1);
550 int main(int argc, char **argv)
554 if (sigsetjmp(close_env, 1)) exit(0);
555 signal(SIGINT, CatchInt);
558 Game.initspeed = DEFAULT_INTERVAL;
564 for (i = 1; i < MAX_SCREENS; i++)
565 Players[i].alive = -1;
568 // if (getopt(argc, argv, "f:") == 'f')
571 ReadConf(CONFIG_FILE);
572 while ((ch = getopt_long(
573 argc, argv, "hHvqp:i:s:c:m:x:", options, NULL
575 HandleOption(ch, optarg);
587 for (i = 1; i < MAX_SCREENS; i++)
588 memcpy(&netGen[i], &netGen[0], sizeof(EventGenRec));
596 memset(&addr, 0, sizeof(addr));
597 addr.sin_family = AF_INET;
598 addr.sin_port = htons(port);
599 addr.sin_addr.s_addr = htonl(INADDR_ANY);
600 if ((connGen.fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
603 setsockopt(connGen.fd, SOL_SOCKET, SO_REUSEADDR,
604 (void *)&val1, sizeof(val1));
605 if (bind(connGen.fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
607 if (listen(connGen.fd, 1) < 0)
610 AddEventGen(&connGen);
611 } //setup listening sock
613 StartServer(); //server loop