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.
26 #include <sys/types.h>
27 #include <netinet/in.h>
29 #include <sys/socket.h>
36 #define HEADER_SIZE sizeof(netint4[3])
38 static struct option options[] = {
39 { "wait", 0, 0, 'w' },
40 { "port", 1, 0, 'p' },
41 { "quadra", 1, 0, 'q' },
42 { "min-players", 1, 0, 'm' },
43 { "max-players", 1, 0, 'x' },
44 { "continuous", 1, 0, 'c' },
45 { "speed", 1, 0, 'i' },
46 { "seed", 1, 0, 's' },
47 { "verbose", 0, 0, 'v' },
48 { "info", 0, 0, 'H' },
49 { "help", 0, 0, 'h' },
53 static char minplayers = 2;
54 static char maxplayers = 8;
55 static char playercount;
56 static char verbose = 0;
58 struct sockaddr_in addr;
60 MyEventType NetGenFunc(EventGenRec *gen, MyEvent *event);
61 static EventGenRec netGen[MAX_SCREENS] = {
62 { NULL, 0, FT_read, -1, NetGenFunc, EM_net, 0, "\0", 0, HEADER_SIZE }
65 static MyEventType AlarmGenFunc(EventGenRec *gen, MyEvent *event);
66 static EventGenRec alarmGen = {
67 &alarmGen, 0, FT_read, -1, AlarmGenFunc, EM_alarm
70 static MyEventType ConnGenFunc(EventGenRec *gen, MyEvent *event);
71 static EventGenRec connGen = {
72 NULL, 0, FT_read, -1, ConnGenFunc, EM_connect
75 static EventGenRec *nextGen = &alarmGen;
77 static sigjmp_buf close_env;
80 void SendPacketTo(short playa, short uid, NetPacketType type, int size, void *data)
84 if (netGen[playa].fd >= 0) {
86 fprintf(stderr, ": send %d from %d to %d\n", type, uid, playa);
87 header[0] = hton4(uid);
88 header[1] = hton4(type);
89 header[2] = hton4(size + HEADER_SIZE);
90 if (MyWrite(netGen[playa].fd, header, HEADER_SIZE) != HEADER_SIZE)
91 die("write (header)");
92 if (size > 0 && data && MyWrite(netGen[playa].fd, data, size) != size)
97 static MyEventType AlarmGenFunc(EventGenRec *gen, MyEvent *event)
102 void SCloseNet(short playa)
103 { //kick some connection's ass!
106 if (netGen[playa].fd >= 0) {
107 if (Players[playa].alive >= 0) {
108 SendPacketTo(playa, 0, NP_endConn, 0, NULL);
109 do {} while (WaitMyEvent(&event, EM_net) != E_lostConn);
110 } //say bye to player
111 close(netGen[playa].fd);
112 netGen[playa].fd = -1;
114 if (netGen[playa].next)
115 RemoveEventGen(&netGen[playa]);
119 { //nou oogjes dicht en snaveltjes toe
122 fprintf(stderr, "- Closing connections...\n");
123 for (i = 1; i < MAX_SCREENS; i++)
124 SCloseNet(i); //bye everybuddy
125 fprintf(stderr, "* All Done\n\n");
128 MyEventType NetGenFunc(EventGenRec *gen, MyEvent *event)
131 short uid, type, size;
132 netint4 *data = (netint4*)&(gen->buf);
134 result = MyRead(gen->fd, gen->buf + gen->bufSize,
135 gen->bufGoal - gen->bufSize);
137 fprintf(stderr, "- Closed connection to player #%d\n", gen->player);
140 gen->bufSize += result;
141 if (gen->bufSize < gen->bufGoal)
143 // *ugly* memcpy(data, gen->buf, sizeof(data));
144 uid = ntoh4(data[0]);
145 type = ntoh4(data[1]);
146 size = ntoh4(data[2]);
148 if (gen->bufSize < gen->bufGoal)
151 gen->bufGoal = HEADER_SIZE;
152 event->u.net.sender = gen->player;
153 event->u.net.uid = uid;
154 event->u.net.type = type;
155 event->u.net.size = size - HEADER_SIZE;
156 event->u.net.data = gen->buf + HEADER_SIZE;
157 if (type == NP_endConn) {
158 fprintf(stderr, "- Quit player #%d\n", gen->player);
160 } //client sent quit signal
165 static MyEventType ConnGenFunc(EventGenRec *gen, MyEvent *event)
171 addrLen = sizeof(addr);
172 for (new = 1; new <= MAX_SCREENS; new++)
173 if (netGen[new].fd < 0) break;
174 if (new > maxplayers) return;
176 if ((netGen[new].fd =
177 accept(gen->fd, (struct sockaddr *)&addr, &addrLen)) < 0)
179 fprintf(stderr, "+ Connection: %s\n", inet_ntoa(addr.sin_addr));
182 setsockopt(netGen[new].fd, SOL_SOCKET, SO_LINGER,(void *)&val2,
184 AddEventGen(&netGen[new]);
185 netGen[new].player = event->u.net.uid = new;
186 { //new connection; netGen already initialized in GenFunc
187 struct hostent *host;
189 sprintf(Players[new].host, "%s", inet_ntoa(addr.sin_addr));
190 if (addr.sin_family == AF_INET) {
191 host = gethostbyaddr((void *)&addr.sin_addr,
192 sizeof(struct in_addr), AF_INET);
194 strncpy(Players[new].host, host->h_name,
195 sizeof(Players[new].host) - 1);
196 Players[new].host[sizeof(Players[new].host) - 1] = 0;
197 } //set player's hostname
203 void CountPlayers(void)
204 { //count number of players/teams
207 for (i = 1; i < MAX_SCREENS; i++) if (Players[i].alive > 0) {
208 if (Players[i].team < 128) for (j = 1; j < i; j++)
209 if (Players[j].alive > 0 && (Players[j].team == Players[i].team)) {
212 } //player of same team counted before
217 int StartServer(void)
220 netint2 currentpiece[MAX_SCREENS];
221 int playersReady = 0;
224 char teams[10][7] = {
225 "", "Green", "Cyan", "Blue", "Purple",
226 "Red", "Grey", "White", "*Orange"
230 switch (WaitMyEvent(&event, EM_any)) {
231 case E_lostConn: //client went away :(
232 Players[event.u.net.sender].alive = -1;
233 for (i = 1; i < MAX_SCREENS; i++)
234 if (Players[i].alive >= 0)
235 SendPacketTo(i, event.u.net.sender,
236 NP_part, sizeof(Players[0].alive),
237 &Players[event.u.net.sender].alive);
238 SCloseNet(event.u.net.sender);
241 if (verbose) fprintf(stderr, ": %d sent %d\n",
242 netGen[event.u.net.sender].fd, event.u.net.type);
243 switch(event.u.net.type) {
245 // if (event.u.net.type != NP_hello) ByeClient(new);
247 netint4 versiondata[2];
252 memcpy(versiondata, event.u.net.data,
253 sizeof(versiondata));
254 major = ntoh4(versiondata[0]);
255 protocolVersion = ntoh4(versiondata[1]);
256 if (major != MAJOR_VERSION
257 || protocolVersion != PROTOCOL_VERSION) {
258 snprintf(data, sizeof(data),
259 "Version mismatch: received %d.%d",
260 major, protocolVersion);
261 fprintf(stderr, "= Wrong version player #%d (%s)\n",
262 event.u.net.sender, data);
263 SendPacketTo(event.u.net.sender, 0, NP_error,
264 strlen(data)+1, data);
265 SCloseNet(event.u.net.sender);
267 fprintf(stderr, "* Accepted player #%d\n",
272 //receive player details and return other players
273 memcpy(&Players[event.u.net.sender],
274 event.u.net.data, event.u.net.size);
275 if (Players[event.u.net.sender].team < 1
276 || Players[event.u.net.sender].team > 7) {
279 for (team = 1; team < 7; team++) {
280 for (i = 1; i < MAX_SCREENS; i++)
281 if ((Players[i].alive > 0) && (Players[i].team == team))
283 if (i==MAX_SCREENS) break;
285 Players[event.u.net.sender].team = team;
286 SendPacketTo(event.u.net.sender, event.u.net.sender, NP_team,
287 sizeof(Players[event.u.net.sender].team),
288 &Players[event.u.net.sender].team);
290 if (Game.started < 2)
291 Players[event.u.net.sender].flags |= SCF_paused;
292 if (!Game.continuous && Game.started >= 2) {
294 strcpy(data, "Can't join: Game has already started");
295 fprintf(stderr, "- Can't join player #%d in "
296 "non-continuous game\n", event.u.net.sender);
297 SendPacketTo(event.u.net.sender, 0, NP_error,
298 strlen(data)+1, data);
299 // SCloseNet(event.u.net.sender, 0);
301 } //can't join started game
312 memcpy(&data, &Players[event.u.net.sender].flags,
313 sizeof(data.playerflags));
314 memcpy(&data.gravity, &Game,
315 sizeof(data) - sizeof(data.playerflags));
316 SendPacketTo(event.u.net.sender, 0, NP_gamedata,
317 sizeof(data), &data);
318 } //send game options
319 for (i = 1; i < MAX_SCREENS; i++)
320 if (netGen[i].fd >= 0 && i != event.u.net.sender) {
321 SendPacketTo(event.u.net.sender, i,
322 NP_newPlayer, sizeof(_Player), &Players[i]);
323 SendPacketTo(event.u.net.sender, i, NP_newPiece,
324 sizeof(Players[i].curShape), &Players[i].curShape);
325 SendPacketTo(i, event.u.net.sender, NP_newPlayer,
326 sizeof(_Player), &Players[event.u.net.sender]);
327 } //send (to) players
328 fprintf(stderr, "> Joined player #%d: %s <%s> (%s)\n",
330 Players[event.u.net.sender].name,
331 Players[event.u.net.sender].host,
332 teams[Players[event.u.net.sender].team]);
333 if (++playersReady >= minplayers) {
334 if (Game.started > 1)
335 SendPacketTo(event.u.net.sender, 0,
338 fprintf(stderr, "* Starting game (%010d)\n",
340 for (i = 1; i < MAX_SCREENS; i++)
341 SendPacketTo(i, 0, NP_start, 0, NULL);
343 } //first goahead (to all)*/
345 break; //NP_playerdata
347 memcpy(&Players[event.u.net.sender].curShape,
348 event.u.net.data, sizeof(Players[0].curShape));
351 Players[event.u.net.sender].alive = 0;
352 fprintf(stderr, "< Player #%d died\n",
354 //check for unpaused game
357 Players[event.u.net.sender].flags ^= SCF_paused;
358 paused = Game.started < 1;
359 for (i = 1; i < MAX_SCREENS; i++)
360 if (Players[i].alive > 0)
361 paused |= Players[i].flags & SCF_paused;
362 fprintf(stderr, "* Player #%d (un)paused (pause=%d)\n",
363 event.u.net.sender, paused);
364 if (paused) paused = 1;
367 default: //relay data to all players
369 // if (event.u.net.type >= NP_pause)
370 if (event.u.net.type >= NP_rotright
373 for (i = 1; i < MAX_SCREENS; i++)
374 if (i != event.u.net.sender)
375 if (event.u.net.type != NP_giveJunk ||
376 Players[i].team != Players[event.u.net.sender].team)
377 SendPacketTo(i, event.u.net.sender,
378 event.u.net.type, event.u.net.size,
384 { //new connection; netGen already initialized in GenFunc
385 char serverdata[255];
387 sprintf(serverdata, "Netris server %s", version_string);
388 SendPacketTo(event.u.net.uid, event.u.net.uid, NP_hello,
389 strlen(serverdata)+1, serverdata);
394 if (Game.started < 1) {
395 if (playercount > 1) {
396 fprintf(stderr, "* Game (%010d) ready to start\n", Game.seed);
399 } //game not yet started
401 if (playercount < 2) {
402 fprintf(stderr, "* Stopping game\n");
403 if (Game.seed) Game.seed++;
404 if (Game.started > 1) for (i = 1; i < MAX_SCREENS; i++)
405 if (Players[i].alive >= 0) {
406 Players[i].alive = 1;
407 Players[i].flags |= SCF_paused;
408 SendPacketTo(i, 0, NP_stop,
409 sizeof(Game.seed), &Game.seed);
410 } //transmit game stop and set players not ready
413 } //too few players for game
414 if (Game.started == 1 && !paused) {
416 fprintf(stderr, "* Game starts\n");
417 for (i = 1; i < MAX_SCREENS; i++)
418 if (Players[i].alive > 0)
419 SendPacketTo(i, 0, NP_start, 0, NULL);
420 } //everybody ready to start
421 } //game (ready to) start(ed)
423 fprintf(stderr, "* Exiting server\n");
430 "NETRIS Server %s\t(c) 2002 Shiar <shiar@shiar.org>\n\n",
438 "Usage: netris <options>\n"
440 " -h, --help\t\tPrint this usage information\n"
441 " -H, --info\t\tShow distribution and warranty information\n"
443 " -p, --port <port>\tSet port number (default is %d)\n"
445 " -s, --seed <seed>\tStart with given random seed\n"
446 " -i, --speed <sec>\tSet the initial step-down interval, in seconds\n"
447 " -m, --min-players <2>\tNumber of players required before starting the game\n"
448 " -x, --max-players <8>\tMaximum number of players allowed in the game\n"
449 " -c, --continuous\tDon'n quit the game\n"
457 file_out = fopen(CONFIG_FILE, "w");
458 if (file_out == NULL) {
459 perror("Error writing config file");
463 fprintf(file_out, "### NETRIS %s Config file ###\n\n", version_string);
466 fprintf(stderr, "Wrote new game configuration to %s\n", CONFIG_FILE);
469 void HandleOption(char tag, char *value)
478 case 'c': //min-players
479 Game.continuous = atoi(value);
481 case 'm': //min-players
482 minplayers = atoi(value);
484 case 'x': //max-players
485 maxplayers = atoi(value);
486 if (maxplayers >= MAX_SCREENS)
487 maxplayers = MAX_SCREENS;
489 case 'q': //quadra-style gravity
492 case 'i': //speed (of level 1)
493 Game.initspeed = atof(value) * 1e6;
496 Game.seed = atoi(value);
508 void ReadConf(char *filename)
514 char tag[81], value[81];
516 file_in = fopen(filename, "r");
518 while (fgets(buf, 512, file_in) != NULL) {
519 if ((ch = strchr(buf, '#')))
520 *ch = '\0'; // truncate string from # char
521 for (i = strlen(buf)-1; i >= 0; i--)
522 if (buf[i] == ' ' || buf[i] == '\t'
523 || buf[i] == '\n' || buf[i] == 13)
527 sscanf(buf, "%80[^= \t] = %80[^\n]", tag, value);
528 for (i = 0; options[i].name; i++){
529 if (!strcasecmp(options[i].name, tag)) {
530 HandleOption(options[i].val, value);
538 fprintf(stderr, "Unable to open config file %s.\n", filename);
543 void CatchInt(int sig)
545 siglongjmp(close_env, 1);
548 int main(int argc, char **argv)
552 if (sigsetjmp(close_env, 1)) exit(0);
553 signal(SIGINT, CatchInt);
556 Game.initspeed = DEFAULT_INTERVAL;
562 for (i = 1; i < MAX_SCREENS; i++)
563 Players[i].alive = -1;
566 // if (getopt(argc, argv, "f:") == 'f')
569 ReadConf(CONFIG_FILE);
570 while ((ch = getopt_long(
571 argc, argv, "hHvqp:i:s:c:m:x:", options, NULL
573 HandleOption(ch, optarg);
585 for (i = 1; i < MAX_SCREENS; i++)
586 memcpy(&netGen[i], &netGen[0], sizeof(EventGenRec));
594 memset(&addr, 0, sizeof(addr));
595 addr.sin_family = AF_INET;
596 addr.sin_port = htons(port);
597 addr.sin_addr.s_addr = htonl(INADDR_ANY);
598 if ((connGen.fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
601 setsockopt(connGen.fd, SOL_SOCKET, SO_REUSEADDR,
602 (void *)&val1, sizeof(val1));
603 if (bind(connGen.fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
605 if (listen(connGen.fd, 1) < 0)
608 AddEventGen(&connGen);
609 } //setup listening sock
611 StartServer(); //server loop