1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
3 | |
3 | * |
|
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4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | Copyright (C) 1992 Frank Tore Johansen |
5 | * Copyright (©) 1992,2007 Frank Tore Johansen |
5 | |
6 | * |
6 | This program is free software; you can redistribute it and/or modify |
7 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
7 | it under the terms of the GNU General Public License as published by |
8 | * under the terms of the GNU General Public License as published by the Free |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | * Software Foundation; either version 2 of the License, or (at your option) |
9 | (at your option) any later version. |
10 | * any later version. |
10 | |
11 | * |
11 | This program is distributed in the hope that it will be useful, |
12 | * This program is distributed in the hope that it will be useful, but |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
14 | GNU General Public License for more details. |
15 | * for more details. |
15 | |
16 | * |
16 | You should have received a copy of the GNU General Public License |
17 | * You should have received a copy of the GNU General Public License along |
17 | along with this program; if not, write to the Free Software |
18 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | |
20 | * |
20 | The author can be reached via e-mail to mark@pyramid.com |
21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
21 | */ |
22 | */ |
22 | |
23 | |
23 | /** |
24 | /** |
24 | * \file |
25 | * \file |
25 | * Low-level socket-related functions. |
26 | * Low-level socket-related functions. |
26 | * |
27 | * |
… | |
… | |
51 | #define SOCKET_TIMEOUT2 20 * 1000 |
52 | #define SOCKET_TIMEOUT2 20 * 1000 |
52 | |
53 | |
53 | void |
54 | void |
54 | client::flush () |
55 | client::flush () |
55 | { |
56 | { |
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57 | if (destroyed ()) |
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58 | return; |
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59 | |
56 | #ifdef __linux__ |
60 | #ifdef __linux__ |
57 | // check time of last ack, and, if too old, kill connection |
61 | // check time of last ack, and, if too old, kill connection |
58 | struct tcp_info tcpi; |
62 | struct tcp_info tcpi; |
59 | socklen_t len = sizeof (tcpi); |
63 | socklen_t len = sizeof (tcpi); |
60 | |
64 | |
… | |
… | |
182 | |
186 | |
183 | /** |
187 | /** |
184 | * Dispatch table for the server. |
188 | * Dispatch table for the server. |
185 | */ |
189 | */ |
186 | static struct packet_type packets[] = { |
190 | static struct packet_type packets[] = { |
187 | {"ncom", PC(NewPlayerCmd) PF_PLAYING }, |
191 | {"ncom", PC(NewPlayerCmd) PF_PLAYING | PF_COMMAND6 }, |
188 | {"command", PC(PlayerCmd) PF_PLAYING }, |
192 | {"command", PC(PlayerCmd) PF_PLAYING | PF_COMMAND0 }, |
189 | |
193 | |
190 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
194 | {"examine", PC(ExamineCmd) PF_PLAYING }, |
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195 | {"ex", PC(ExCmd) PF_PLAYING }, |
191 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
196 | {"apply", PC(ApplyCmd) PF_PLAYING }, |
192 | {"reply", PC(ReplyCmd) 0 }, |
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|
193 | {"lookat", PC(LookAt) PF_PLAYING }, |
197 | {"lookat", PC(LookAt) PF_PLAYING }, |
194 | {"lock", PC(LockItem) PF_PLAYING }, |
198 | {"lock", PC(LockItem) PF_PLAYING }, |
195 | {"mark", PC(MarkItem) PF_PLAYING }, |
199 | {"mark", PC(MarkItem) PF_PLAYING }, |
196 | {"move", PC(MoveCmd) PF_PLAYING }, |
200 | {"move", PC(MoveCmd) PF_PLAYING }, |
197 | {"ext", PC(ExtCmd) 0 }, /* CF+ */ |
201 | {"ext", PC(ExtCmd) 0 }, // CF+ |
198 | {"mapredraw", PC(MapRedrawCmd) 0 }, /* Added: phil */ |
202 | {"mapredraw", PC(MapRedrawCmd) 0 }, |
199 | {"mapinfo", PC(MapInfoCmd) 0 }, /* CF+ */ |
203 | {"mapinfo", PC(MapInfoCmd) 0 }, // CF+ |
200 | |
204 | |
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205 | {"reply", SC(ReplyCmd) 0 }, |
201 | {"exti", SC(ExtiCmd) 0 }, /* CF+ */ |
206 | {"exti", SC(ExtiCmd) 0 }, // CF+ |
202 | {"addme", SC(AddMeCmd) 0 }, |
207 | {"addme", SC(AddMeCmd) 0 }, |
203 | {"askface", SC(SendFaceCmd) 0 }, /* Added: phil */ |
208 | {"askface", SC(AskFaceCmd) 0 }, |
204 | {"requestinfo", SC(RequestInfo) 0 }, |
209 | {"requestinfo", SC(RequestInfo) 0 }, |
205 | {"setfacemode", SC(SetFaceMode) 0 }, |
210 | {"setfacemode", SC(SetFaceMode) 0 }, |
206 | {"setsound", SC(SetSound) 0 }, |
211 | {"setsound", SC(SetSound) 0 }, |
207 | {"setup", SC(SetUp) 0 }, |
212 | {"setup", SC(SetUp) 0 }, |
208 | {"version", SC(VersionCmd) 0 }, |
213 | {"version", SC(VersionCmd) 0 }, |
… | |
… | |
213 | |
218 | |
214 | bool |
219 | bool |
215 | client::may_execute (const packet_type *pkt) const |
220 | client::may_execute (const packet_type *pkt) const |
216 | { |
221 | { |
217 | return (!(pkt->flags & PF_PLAYER) || pl) |
222 | return (!(pkt->flags & PF_PLAYER) || pl) |
218 | && (!(pkt->flags & PF_PLAYING) || (pl && pl->state == ST_PLAYING)); |
223 | && (!(pkt->flags & PF_PLAYING) || state == ST_PLAYING); |
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224 | } |
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225 | |
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226 | // HACK: some commands currently should be executed |
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227 | // even when the player is frozen. this hack detects |
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228 | // those commands. it should be folded into may_execute, |
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229 | // but kept seperate to emphasise the hack aspect, i.e. |
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230 | // do it better, then remove. |
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231 | static bool |
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232 | always_immediate (const client *ns, const packet_type *pkt, const char *data, int len) |
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233 | { |
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234 | if (!(pkt->flags & (PF_COMMAND0 | PF_COMMAND6))) |
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235 | return false; |
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236 | |
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237 | if (!ns->pl || !ns->pl->ob || !ns->pl->ob->map) |
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238 | return false; |
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239 | |
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240 | if (pkt->flags & PF_COMMAND6) |
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241 | { |
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242 | data += 6; |
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243 | len -= 6; |
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244 | } |
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245 | |
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246 | if (len > 4 && !strncmp (data, "say " , 4)) |
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247 | return true; |
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248 | if (len > 5 && !strncmp (data, "chat ", 5)) |
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249 | return true; |
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250 | |
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251 | return false; |
219 | } |
252 | } |
220 | |
253 | |
221 | void |
254 | void |
222 | client::execute (const packet_type *pkt, char *data, int datalen) |
255 | client::execute (const packet_type *pkt, char *data, int datalen) |
223 | { |
256 | { |
224 | if (may_execute (pkt)) |
257 | if (may_execute (pkt) || always_immediate (this, pkt, data, datalen)) |
225 | { |
258 | { |
226 | //TODO: only one format |
259 | //TODO: only one format |
227 | if (pkt->flags & PF_PLAYER) |
260 | if (pkt->flags & PF_PLAYER) |
228 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
261 | ((void (*)(char *, int, player *))pkt->cb)((char *)data, datalen, pl); |
229 | else |
262 | else |
… | |
… | |
270 | } |
303 | } |
271 | |
304 | |
272 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
305 | for (packet_type *pkt = packets; pkt < packets + (sizeof (packets) / sizeof (packets[0])); ++pkt) |
273 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
306 | if (!strcmp ((char *)inbuf + 2, pkt->name)) |
274 | { |
307 | { |
275 | if (pkt->flags & PF_PLAYER) |
308 | if (pkt->flags & PF_PLAYER && !always_immediate (this, pkt, data, datalen)) |
276 | queue_command (pkt, data, datalen); |
309 | queue_command (pkt, data, datalen); |
277 | else |
310 | else |
278 | execute (pkt, data, datalen); |
311 | execute (pkt, data, datalen); |
279 | |
312 | |
280 | goto next_packet; |
313 | goto next_packet; |
… | |
… | |
294 | // callback called when socket is either readable or writable |
327 | // callback called when socket is either readable or writable |
295 | void |
328 | void |
296 | client::socket_cb (iow &w, int got) |
329 | client::socket_cb (iow &w, int got) |
297 | { |
330 | { |
298 | //TODO remove when we have better socket cleanup logic |
331 | //TODO remove when we have better socket cleanup logic |
299 | if (status == Ns_Dead) |
332 | if (destroyed ()) |
300 | { |
333 | { |
301 | socket_ev.poll (0); |
334 | socket_ev.poll (0); |
302 | return; |
335 | return; |
303 | } |
336 | } |
304 | |
337 | |
… | |
… | |
377 | */ |
410 | */ |
378 | void |
411 | void |
379 | client::send (void *buf_, int len) |
412 | client::send (void *buf_, int len) |
380 | { |
413 | { |
381 | char *buf = (char *)buf_; |
414 | char *buf = (char *)buf_; |
382 | char *pos = buf; |
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383 | int amt = 0; |
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384 | |
415 | |
385 | if (status == Ns_Dead || !buf) |
416 | if (destroyed () || !buf) |
386 | return; |
417 | return; |
387 | |
418 | |
388 | if ((len + outputbuffer.len) > SOCKETBUFSIZE) |
419 | if (len + outputbuffer.len > SOCKETBUFSIZE) |
389 | { |
420 | { |
390 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
421 | LOG (llevDebug, "socket on fd %d has overrun internal buffer - marking as dead\n", fd); |
391 | destroy (); |
422 | // shutdown the socket, this is safer than destroying it immediately |
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423 | // as lots of code in the callchain might still access the map etc. |
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424 | shutdown (fd, SHUT_RDWR); |
392 | return; |
425 | return; |
393 | } |
426 | } |
394 | |
427 | |
395 | int avail, end; |
428 | int avail, end; |
396 | |
429 | |
… | |
… | |
421 | * shortcut function. |
454 | * shortcut function. |
422 | */ |
455 | */ |
423 | void |
456 | void |
424 | client::send_packet (packet &sl) |
457 | client::send_packet (packet &sl) |
425 | { |
458 | { |
426 | if (status == Ns_Dead) |
459 | if (destroyed ()) |
427 | return; |
460 | return; |
428 | |
461 | |
429 | if (sl.length () >= MAXSOCKBUF) |
462 | if (sl.length () >= MAXSOCKBUF) |
430 | { |
463 | { |
431 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
464 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", sl.length ()); |
… | |
… | |
472 | va_end (ap); |
505 | va_end (ap); |
473 | |
506 | |
474 | send_packet (sl); |
507 | send_packet (sl); |
475 | } |
508 | } |
476 | |
509 | |
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510 | void |
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511 | client::send_drawinfo (const char *msg, int flags) |
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512 | { |
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513 | send_packet_printf ("drawinfo %d %s", flags, msg); |
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514 | } |
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515 | |
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516 | void |
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517 | client::send_msg (int color, const char *type, const char *msg) |
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518 | { |
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519 | if (can_msg) |
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520 | send_packet_printf ("msg %d %s %s", color, type, msg); |
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521 | else if (color < 0) |
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522 | return; // client cannot handle this |
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523 | else if (strchr (msg, '<') || strchr (msg, '&')) |
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524 | { |
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525 | //TODO: should escape/modify to old syntax |
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526 | send_packet_printf ("drawinfo %d %s", color, msg); |
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527 | } |
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528 | else |
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529 | send_packet_printf ("drawinfo %d %s", color, msg); |
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530 | } |
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531 | |
477 | /*********************************************************************** |
532 | /*********************************************************************** |
478 | * |
533 | * |
479 | * packet functions/utilities |
534 | * packet functions/utilities |
480 | * |
535 | * |
481 | **********************************************************************/ |
536 | **********************************************************************/ |
… | |
… | |
485 | reset (); |
540 | reset (); |
486 | |
541 | |
487 | int len = strlen (name); |
542 | int len = strlen (name); |
488 | memcpy (cur, name, len); cur += len; |
543 | memcpy (cur, name, len); cur += len; |
489 | *cur++ = ' '; |
544 | *cur++ = ' '; |
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545 | } |
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546 | |
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547 | packet &packet::operator <<(const ber32 v) |
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548 | { |
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549 | enum { maxlen = 32 / 7 + 1}; |
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550 | uint8 buf[maxlen]; |
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551 | uint8 *p = buf + maxlen; |
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552 | uint32 val = v.val; |
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553 | |
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554 | *--p = val & 0x7F; |
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555 | |
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556 | while (val > 0x7F) |
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557 | { |
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558 | val >>= 7; |
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559 | *--p = (val & 0x7F) | 0x80; |
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560 | } |
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561 | |
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562 | return *this << data (p, buf + maxlen - p); |
490 | } |
563 | } |
491 | |
564 | |
492 | packet &packet::operator <<(const data &v) |
565 | packet &packet::operator <<(const data &v) |
493 | { |
566 | { |
494 | if (room () < v.len) |
567 | if (room () < v.len) |