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212380e3 | 1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * channel.c: Controls channels. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
1ebf4db4 | 24 | * $Id: channel.c 3259 2007-03-15 18:09:08Z jilles $ |
212380e3 | 25 | */ |
26 | ||
27 | #include "stdinc.h" | |
28 | #include "tools.h" | |
29 | #include "channel.h" | |
30 | #include "client.h" | |
31 | #include "common.h" | |
32 | #include "hash.h" | |
33 | #include "hook.h" | |
34 | #include "irc_string.h" | |
35 | #include "sprintf_irc.h" | |
36 | #include "ircd.h" | |
37 | #include "numeric.h" | |
38 | #include "s_serv.h" /* captab */ | |
39 | #include "s_user.h" | |
40 | #include "send.h" | |
41 | #include "whowas.h" | |
42 | #include "s_conf.h" /* ConfigFileEntry, ConfigChannel */ | |
43 | #include "s_newconf.h" | |
44 | #include "event.h" | |
45 | #include "memory.h" | |
46 | #include "balloc.h" | |
47 | #include "s_log.h" | |
48 | ||
49 | extern dlink_list global_channel_list; | |
50 | ||
51 | extern struct config_channel_entry ConfigChannel; | |
52 | extern BlockHeap *channel_heap; | |
53 | extern BlockHeap *ban_heap; | |
54 | extern BlockHeap *topic_heap; | |
55 | extern BlockHeap *member_heap; | |
56 | ||
57 | static int channel_capabs[] = { CAP_EX, CAP_IE, | |
58 | CAP_SERVICE, | |
59 | CAP_TS6 | |
60 | }; | |
61 | ||
62 | #define NCHCAPS (sizeof(channel_capabs)/sizeof(int)) | |
63 | #define NCHCAP_COMBOS (1 << NCHCAPS) | |
64 | ||
65 | static struct ChCapCombo chcap_combos[NCHCAP_COMBOS]; | |
66 | ||
67 | static void free_topic(struct Channel *chptr); | |
68 | ||
69 | static int h_can_join; | |
70 | ||
71 | /* init_channels() | |
72 | * | |
73 | * input - | |
74 | * output - | |
75 | * side effects - initialises the various blockheaps | |
76 | */ | |
77 | void | |
78 | init_channels(void) | |
79 | { | |
80 | channel_heap = BlockHeapCreate(sizeof(struct Channel), CHANNEL_HEAP_SIZE); | |
81 | ban_heap = BlockHeapCreate(sizeof(struct Ban), BAN_HEAP_SIZE); | |
82 | topic_heap = BlockHeapCreate(TOPICLEN + 1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE); | |
83 | member_heap = BlockHeapCreate(sizeof(struct membership), MEMBER_HEAP_SIZE); | |
84 | ||
85 | h_can_join = register_hook("can_join"); | |
86 | } | |
87 | ||
88 | /* | |
89 | * allocate_channel - Allocates a channel | |
90 | */ | |
91 | struct Channel * | |
92 | allocate_channel(const char *chname) | |
93 | { | |
94 | struct Channel *chptr; | |
95 | chptr = BlockHeapAlloc(channel_heap); | |
96 | DupNString(chptr->chname, chname, CHANNELLEN); | |
97 | return (chptr); | |
98 | } | |
99 | ||
100 | void | |
101 | free_channel(struct Channel *chptr) | |
102 | { | |
103 | MyFree(chptr->chname); | |
104 | BlockHeapFree(channel_heap, chptr); | |
105 | } | |
106 | ||
107 | struct Ban * | |
108 | allocate_ban(const char *banstr, const char *who) | |
109 | { | |
110 | struct Ban *bptr; | |
111 | bptr = BlockHeapAlloc(ban_heap); | |
112 | DupNString(bptr->banstr, banstr, BANLEN); | |
113 | DupNString(bptr->who, who, BANLEN); | |
114 | ||
115 | return (bptr); | |
116 | } | |
117 | ||
118 | void | |
119 | free_ban(struct Ban *bptr) | |
120 | { | |
121 | MyFree(bptr->banstr); | |
122 | MyFree(bptr->who); | |
123 | BlockHeapFree(ban_heap, bptr); | |
124 | } | |
125 | ||
126 | ||
127 | /* find_channel_membership() | |
128 | * | |
129 | * input - channel to find them in, client to find | |
130 | * output - membership of client in channel, else NULL | |
131 | * side effects - | |
132 | */ | |
133 | struct membership * | |
134 | find_channel_membership(struct Channel *chptr, struct Client *client_p) | |
135 | { | |
136 | struct membership *msptr; | |
137 | dlink_node *ptr; | |
138 | ||
139 | if(!IsClient(client_p)) | |
140 | return NULL; | |
141 | ||
142 | /* Pick the most efficient list to use to be nice to things like | |
143 | * CHANSERV which could be in a large number of channels | |
144 | */ | |
145 | if(dlink_list_length(&chptr->members) < dlink_list_length(&client_p->user->channel)) | |
146 | { | |
147 | DLINK_FOREACH(ptr, chptr->members.head) | |
148 | { | |
149 | msptr = ptr->data; | |
150 | ||
151 | if(msptr->client_p == client_p) | |
152 | return msptr; | |
153 | } | |
154 | } | |
155 | else | |
156 | { | |
157 | DLINK_FOREACH(ptr, client_p->user->channel.head) | |
158 | { | |
159 | msptr = ptr->data; | |
160 | ||
161 | if(msptr->chptr == chptr) | |
162 | return msptr; | |
163 | } | |
164 | } | |
165 | ||
166 | return NULL; | |
167 | } | |
168 | ||
169 | /* find_channel_status() | |
170 | * | |
171 | * input - membership to get status for, whether we can combine flags | |
172 | * output - flags of user on channel | |
173 | * side effects - | |
174 | */ | |
175 | const char * | |
176 | find_channel_status(struct membership *msptr, int combine) | |
177 | { | |
178 | static char buffer[3]; | |
179 | char *p; | |
180 | ||
181 | p = buffer; | |
182 | ||
183 | if(is_chanop(msptr)) | |
184 | { | |
185 | if(!combine) | |
186 | return "@"; | |
187 | *p++ = '@'; | |
188 | } | |
189 | ||
190 | if(is_voiced(msptr)) | |
191 | *p++ = '+'; | |
192 | ||
193 | *p = '\0'; | |
194 | return buffer; | |
195 | } | |
196 | ||
197 | /* add_user_to_channel() | |
198 | * | |
199 | * input - channel to add client to, client to add, channel flags | |
200 | * output - | |
201 | * side effects - user is added to channel | |
202 | */ | |
203 | void | |
204 | add_user_to_channel(struct Channel *chptr, struct Client *client_p, int flags) | |
205 | { | |
206 | struct membership *msptr; | |
207 | ||
208 | s_assert(client_p->user != NULL); | |
209 | if(client_p->user == NULL) | |
210 | return; | |
211 | ||
212 | msptr = BlockHeapAlloc(member_heap); | |
213 | ||
214 | msptr->chptr = chptr; | |
215 | msptr->client_p = client_p; | |
216 | msptr->flags = flags; | |
217 | ||
218 | dlinkAdd(msptr, &msptr->usernode, &client_p->user->channel); | |
219 | dlinkAdd(msptr, &msptr->channode, &chptr->members); | |
220 | ||
221 | if(MyClient(client_p)) | |
222 | dlinkAdd(msptr, &msptr->locchannode, &chptr->locmembers); | |
223 | } | |
224 | ||
225 | /* remove_user_from_channel() | |
226 | * | |
227 | * input - membership pointer to remove from channel | |
228 | * output - | |
229 | * side effects - membership (thus user) is removed from channel | |
230 | */ | |
231 | void | |
232 | remove_user_from_channel(struct membership *msptr) | |
233 | { | |
234 | struct Client *client_p; | |
235 | struct Channel *chptr; | |
236 | s_assert(msptr != NULL); | |
237 | if(msptr == NULL) | |
238 | return; | |
239 | ||
240 | client_p = msptr->client_p; | |
241 | chptr = msptr->chptr; | |
242 | ||
243 | dlinkDelete(&msptr->usernode, &client_p->user->channel); | |
244 | dlinkDelete(&msptr->channode, &chptr->members); | |
245 | ||
246 | if(client_p->servptr == &me) | |
247 | dlinkDelete(&msptr->locchannode, &chptr->locmembers); | |
248 | ||
249 | chptr->users_last = CurrentTime; | |
250 | ||
251 | if(!(chptr->mode.mode & MODE_PERMANENT) && dlink_list_length(&chptr->members) <= 0) | |
252 | destroy_channel(chptr); | |
253 | ||
254 | BlockHeapFree(member_heap, msptr); | |
255 | ||
256 | return; | |
257 | } | |
258 | ||
259 | /* remove_user_from_channels() | |
260 | * | |
261 | * input - user to remove from all channels | |
262 | * output - | |
263 | * side effects - user is removed from all channels | |
264 | */ | |
265 | void | |
266 | remove_user_from_channels(struct Client *client_p) | |
267 | { | |
268 | struct Channel *chptr; | |
269 | struct membership *msptr; | |
270 | dlink_node *ptr; | |
271 | dlink_node *next_ptr; | |
272 | ||
273 | if(client_p == NULL) | |
274 | return; | |
275 | ||
276 | DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->user->channel.head) | |
277 | { | |
278 | msptr = ptr->data; | |
279 | chptr = msptr->chptr; | |
280 | ||
281 | dlinkDelete(&msptr->channode, &chptr->members); | |
282 | ||
283 | if(client_p->servptr == &me) | |
284 | dlinkDelete(&msptr->locchannode, &chptr->locmembers); | |
285 | ||
286 | chptr->users_last = CurrentTime; | |
287 | ||
288 | if(!(chptr->mode.mode & MODE_PERMANENT) && dlink_list_length(&chptr->members) <= 0) | |
289 | destroy_channel(chptr); | |
290 | ||
291 | BlockHeapFree(member_heap, msptr); | |
292 | } | |
293 | ||
294 | client_p->user->channel.head = client_p->user->channel.tail = NULL; | |
295 | client_p->user->channel.length = 0; | |
296 | } | |
297 | ||
298 | /* invalidate_bancache_user() | |
299 | * | |
300 | * input - user to invalidate ban cache for | |
301 | * output - | |
302 | * side effects - ban cache is invalidated for all memberships of that user | |
303 | * to be used after a nick change | |
304 | */ | |
305 | void | |
306 | invalidate_bancache_user(struct Client *client_p) | |
307 | { | |
308 | struct membership *msptr; | |
309 | dlink_node *ptr; | |
310 | ||
311 | if(client_p == NULL) | |
312 | return; | |
313 | ||
314 | DLINK_FOREACH(ptr, client_p->user->channel.head) | |
315 | { | |
316 | msptr = ptr->data; | |
317 | msptr->bants = 0; | |
318 | msptr->flags &= ~CHFL_BANNED; | |
319 | } | |
320 | } | |
321 | ||
322 | /* check_channel_name() | |
323 | * | |
324 | * input - channel name | |
325 | * output - 1 if valid channel name, else 0 | |
326 | * side effects - | |
327 | */ | |
328 | int | |
329 | check_channel_name(const char *name) | |
330 | { | |
331 | s_assert(name != NULL); | |
332 | if(name == NULL) | |
333 | return 0; | |
334 | ||
335 | for (; *name; ++name) | |
336 | { | |
337 | if(!IsChanChar(*name)) | |
338 | return 0; | |
339 | } | |
340 | ||
341 | return 1; | |
342 | } | |
343 | ||
344 | /* free_channel_list() | |
345 | * | |
346 | * input - dlink list to free | |
347 | * output - | |
348 | * side effects - list of b/e/I modes is cleared | |
349 | */ | |
350 | void | |
351 | free_channel_list(dlink_list * list) | |
352 | { | |
353 | dlink_node *ptr; | |
354 | dlink_node *next_ptr; | |
355 | struct Ban *actualBan; | |
356 | ||
357 | DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) | |
358 | { | |
359 | actualBan = ptr->data; | |
360 | free_ban(actualBan); | |
361 | } | |
362 | ||
363 | list->head = list->tail = NULL; | |
364 | list->length = 0; | |
365 | } | |
366 | ||
367 | /* destroy_channel() | |
368 | * | |
369 | * input - channel to destroy | |
370 | * output - | |
371 | * side effects - channel is obliterated | |
372 | */ | |
373 | void | |
374 | destroy_channel(struct Channel *chptr) | |
375 | { | |
376 | dlink_node *ptr, *next_ptr; | |
377 | ||
378 | DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head) | |
379 | { | |
380 | del_invite(chptr, ptr->data); | |
381 | } | |
382 | ||
383 | /* free all bans/exceptions/denies */ | |
384 | free_channel_list(&chptr->banlist); | |
385 | free_channel_list(&chptr->exceptlist); | |
386 | free_channel_list(&chptr->invexlist); | |
387 | ||
388 | /* Free the topic */ | |
389 | free_topic(chptr); | |
390 | ||
391 | dlinkDelete(&chptr->node, &global_channel_list); | |
392 | del_from_channel_hash(chptr->chname, chptr); | |
393 | free_channel(chptr); | |
394 | } | |
395 | ||
396 | /* channel_pub_or_secret() | |
397 | * | |
398 | * input - channel | |
399 | * output - "=" if public, "@" if secret, else "*" | |
400 | * side effects - | |
401 | */ | |
402 | static const char * | |
403 | channel_pub_or_secret(struct Channel *chptr) | |
404 | { | |
405 | if(PubChannel(chptr)) | |
406 | return ("="); | |
407 | else if(SecretChannel(chptr)) | |
408 | return ("@"); | |
409 | return ("*"); | |
410 | } | |
411 | ||
412 | /* channel_member_names() | |
413 | * | |
414 | * input - channel to list, client to list to, show endofnames | |
415 | * output - | |
416 | * side effects - client is given list of users on channel | |
417 | */ | |
418 | void | |
419 | channel_member_names(struct Channel *chptr, struct Client *client_p, int show_eon) | |
420 | { | |
421 | struct membership *msptr; | |
422 | struct Client *target_p; | |
423 | dlink_node *ptr; | |
424 | char lbuf[BUFSIZE]; | |
425 | char *t; | |
426 | int mlen; | |
427 | int tlen; | |
428 | int cur_len; | |
429 | int is_member; | |
430 | int stack = IsCapable(client_p, CLICAP_MULTI_PREFIX); | |
431 | ||
432 | if(ShowChannel(client_p, chptr)) | |
433 | { | |
434 | is_member = IsMember(client_p, chptr); | |
435 | ||
436 | cur_len = mlen = ircsprintf(lbuf, form_str(RPL_NAMREPLY), | |
437 | me.name, client_p->name, | |
438 | channel_pub_or_secret(chptr), chptr->chname); | |
439 | ||
440 | t = lbuf + cur_len; | |
441 | ||
442 | DLINK_FOREACH(ptr, chptr->members.head) | |
443 | { | |
444 | msptr = ptr->data; | |
445 | target_p = msptr->client_p; | |
446 | ||
447 | if(IsInvisible(target_p) && !is_member) | |
448 | continue; | |
449 | ||
450 | /* space, possible "@+" prefix */ | |
451 | if(cur_len + strlen(target_p->name) + 3 >= BUFSIZE - 3) | |
452 | { | |
453 | *(t - 1) = '\0'; | |
454 | sendto_one(client_p, "%s", lbuf); | |
455 | cur_len = mlen; | |
456 | t = lbuf + mlen; | |
457 | } | |
458 | ||
459 | tlen = ircsprintf(t, "%s%s ", find_channel_status(msptr, stack), | |
460 | target_p->name); | |
461 | ||
462 | cur_len += tlen; | |
463 | t += tlen; | |
464 | } | |
465 | ||
466 | /* The old behaviour here was to always output our buffer, | |
467 | * even if there are no clients we can show. This happens | |
468 | * when a client does "NAMES" with no parameters, and all | |
469 | * the clients on a -sp channel are +i. I dont see a good | |
470 | * reason for keeping that behaviour, as it just wastes | |
471 | * bandwidth. --anfl | |
472 | */ | |
473 | if(cur_len != mlen) | |
474 | { | |
475 | *(t - 1) = '\0'; | |
476 | sendto_one(client_p, "%s", lbuf); | |
477 | } | |
478 | } | |
479 | ||
480 | if(show_eon) | |
481 | sendto_one(client_p, form_str(RPL_ENDOFNAMES), | |
482 | me.name, client_p->name, chptr->chname); | |
483 | } | |
484 | ||
485 | /* del_invite() | |
486 | * | |
487 | * input - channel to remove invite from, client to remove | |
488 | * output - | |
489 | * side effects - user is removed from invite list, if exists | |
490 | */ | |
491 | void | |
492 | del_invite(struct Channel *chptr, struct Client *who) | |
493 | { | |
494 | dlinkFindDestroy(who, &chptr->invites); | |
495 | dlinkFindDestroy(chptr, &who->user->invited); | |
496 | } | |
497 | ||
498 | /* is_banned() | |
499 | * | |
500 | * input - channel to check bans for, user to check bans against | |
501 | * optional prebuilt buffers | |
502 | * output - 1 if banned, else 0 | |
503 | * side effects - | |
504 | */ | |
505 | int | |
506 | is_banned(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
507 | const char *s, const char *s2) | |
508 | { | |
509 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
510 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
511 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
512 | char *s3 = NULL; | |
513 | dlink_node *ptr; | |
514 | struct Ban *actualBan = NULL; | |
515 | struct Ban *actualExcept = NULL; | |
516 | ||
517 | if(!MyClient(who)) | |
518 | return 0; | |
519 | ||
520 | /* if the buffers havent been built, do it here */ | |
521 | if(s == NULL) | |
522 | { | |
523 | ircsprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); | |
524 | ircsprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
525 | ||
526 | s = src_host; | |
527 | s2 = src_iphost; | |
528 | } | |
529 | if(who->localClient->mangledhost != NULL) | |
530 | { | |
531 | /* if host mangling mode enabled, also check their real host */ | |
532 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
533 | { | |
534 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); | |
535 | s3 = src_althost; | |
536 | } | |
537 | /* if host mangling mode not enabled and no other spoof, | |
538 | * also check the mangled form of their host */ | |
539 | else if (!IsDynSpoof(who)) | |
540 | { | |
541 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); | |
542 | s3 = src_althost; | |
543 | } | |
544 | } | |
545 | ||
546 | DLINK_FOREACH(ptr, chptr->banlist.head) | |
547 | { | |
548 | actualBan = ptr->data; | |
549 | if(match(actualBan->banstr, s) || | |
550 | match(actualBan->banstr, s2) || | |
551 | match_cidr(actualBan->banstr, s2) || | |
552 | match_extban(actualBan->banstr, who, chptr, CHFL_BAN) || | |
553 | (s3 != NULL && match(actualBan->banstr, s3))) | |
554 | break; | |
555 | else | |
556 | actualBan = NULL; | |
557 | } | |
558 | ||
559 | if((actualBan != NULL) && ConfigChannel.use_except) | |
560 | { | |
561 | DLINK_FOREACH(ptr, chptr->exceptlist.head) | |
562 | { | |
563 | actualExcept = ptr->data; | |
564 | ||
565 | /* theyre exempted.. */ | |
566 | if(match(actualExcept->banstr, s) || | |
567 | match(actualExcept->banstr, s2) || | |
568 | match_cidr(actualExcept->banstr, s2) || | |
569 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
570 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
571 | { | |
572 | /* cache the fact theyre not banned */ | |
573 | if(msptr != NULL) | |
574 | { | |
575 | msptr->bants = chptr->bants; | |
576 | msptr->flags &= ~CHFL_BANNED; | |
577 | } | |
578 | ||
579 | return CHFL_EXCEPTION; | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
584 | /* cache the banned/not banned status */ | |
585 | if(msptr != NULL) | |
586 | { | |
587 | msptr->bants = chptr->bants; | |
588 | ||
589 | if(actualBan != NULL) | |
590 | { | |
591 | msptr->flags |= CHFL_BANNED; | |
592 | return CHFL_BAN; | |
593 | } | |
594 | else | |
595 | { | |
596 | msptr->flags &= ~CHFL_BANNED; | |
597 | return 0; | |
598 | } | |
599 | } | |
600 | ||
601 | return ((actualBan ? CHFL_BAN : 0)); | |
602 | } | |
603 | ||
604 | /* is_quieted() | |
605 | * | |
606 | * input - channel to check bans for, user to check bans against | |
607 | * optional prebuilt buffers | |
608 | * output - 1 if banned, else 0 | |
609 | * side effects - | |
610 | */ | |
611 | int | |
612 | is_quieted(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
613 | const char *s, const char *s2) | |
614 | { | |
615 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
616 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
617 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
618 | char *s3 = NULL; | |
619 | dlink_node *ptr; | |
620 | struct Ban *actualBan = NULL; | |
621 | struct Ban *actualExcept = NULL; | |
622 | ||
623 | if(!MyClient(who)) | |
624 | return 0; | |
625 | ||
626 | /* if the buffers havent been built, do it here */ | |
627 | if(s == NULL) | |
628 | { | |
629 | ircsprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); | |
630 | ircsprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
631 | ||
632 | s = src_host; | |
633 | s2 = src_iphost; | |
634 | } | |
635 | if(who->localClient->mangledhost != NULL) | |
636 | { | |
637 | /* if host mangling mode enabled, also check their real host */ | |
638 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
639 | { | |
640 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); | |
641 | s3 = src_althost; | |
642 | } | |
643 | /* if host mangling mode not enabled and no other spoof, | |
644 | * also check the mangled form of their host */ | |
645 | else if (!IsDynSpoof(who)) | |
646 | { | |
647 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); | |
648 | s3 = src_althost; | |
649 | } | |
650 | } | |
651 | ||
652 | DLINK_FOREACH(ptr, chptr->quietlist.head) | |
653 | { | |
654 | actualBan = ptr->data; | |
655 | if(match(actualBan->banstr, s) || | |
656 | match(actualBan->banstr, s2) || | |
657 | match_cidr(actualBan->banstr, s2) || | |
658 | match_extban(actualBan->banstr, who, chptr, CHFL_QUIET) || | |
659 | (s3 != NULL && match(actualBan->banstr, s3))) | |
660 | break; | |
661 | else | |
662 | actualBan = NULL; | |
663 | } | |
664 | ||
665 | if((actualBan != NULL) && ConfigChannel.use_except) | |
666 | { | |
667 | DLINK_FOREACH(ptr, chptr->exceptlist.head) | |
668 | { | |
669 | actualExcept = ptr->data; | |
670 | ||
671 | /* theyre exempted.. */ | |
672 | if(match(actualExcept->banstr, s) || | |
673 | match(actualExcept->banstr, s2) || | |
674 | match_cidr(actualExcept->banstr, s2) || | |
675 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
676 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
677 | { | |
678 | /* cache the fact theyre not banned */ | |
679 | if(msptr != NULL) | |
680 | { | |
681 | msptr->bants = chptr->bants; | |
682 | msptr->flags &= ~CHFL_BANNED; | |
683 | } | |
684 | ||
685 | return CHFL_EXCEPTION; | |
686 | } | |
687 | } | |
688 | } | |
689 | ||
690 | /* cache the banned/not banned status */ | |
691 | if(msptr != NULL) | |
692 | { | |
693 | msptr->bants = chptr->bants; | |
694 | ||
695 | if(actualBan != NULL) | |
696 | { | |
697 | msptr->flags |= CHFL_BANNED; | |
698 | return CHFL_BAN; | |
699 | } | |
700 | else | |
701 | { | |
702 | msptr->flags &= ~CHFL_BANNED; | |
703 | return 0; | |
704 | } | |
705 | } | |
706 | ||
707 | return ((actualBan ? CHFL_BAN : 0)); | |
708 | } | |
709 | ||
710 | /* can_join() | |
711 | * | |
712 | * input - client to check, channel to check for, key | |
713 | * output - reason for not being able to join, else 0 | |
714 | * side effects - | |
715 | */ | |
716 | int | |
717 | can_join(struct Client *source_p, struct Channel *chptr, char *key) | |
718 | { | |
1ebf4db4 | 719 | dlink_node *invite = NULL; |
212380e3 | 720 | dlink_node *ptr; |
721 | struct Ban *invex = NULL; | |
722 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
723 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
724 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
725 | int use_althost = 0; | |
1ebf4db4 | 726 | int i = 0; |
212380e3 | 727 | hook_data_channel moduledata; |
728 | ||
729 | s_assert(source_p->localClient != NULL); | |
730 | ||
731 | ircsprintf(src_host, "%s!%s@%s", source_p->name, source_p->username, source_p->host); | |
732 | ircsprintf(src_iphost, "%s!%s@%s", source_p->name, source_p->username, source_p->sockhost); | |
733 | if(source_p->localClient->mangledhost != NULL) | |
734 | { | |
735 | /* if host mangling mode enabled, also check their real host */ | |
736 | if(!strcmp(source_p->host, source_p->localClient->mangledhost)) | |
737 | { | |
738 | ircsprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->orighost); | |
739 | use_althost = 1; | |
740 | } | |
741 | /* if host mangling mode not enabled and no other spoof, | |
742 | * also check the mangled form of their host */ | |
743 | else if (!IsDynSpoof(source_p)) | |
744 | { | |
745 | ircsprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->localClient->mangledhost); | |
746 | use_althost = 1; | |
747 | } | |
748 | } | |
749 | ||
750 | if((is_banned(chptr, source_p, NULL, src_host, src_iphost)) == CHFL_BAN) | |
751 | return (ERR_BANNEDFROMCHAN); | |
752 | ||
753 | if(chptr->mode.mode & MODE_INVITEONLY) | |
754 | { | |
1ebf4db4 | 755 | DLINK_FOREACH(invite, source_p->user->invited.head) |
212380e3 | 756 | { |
1ebf4db4 | 757 | if(invite->data == chptr) |
212380e3 | 758 | break; |
759 | } | |
1ebf4db4 | 760 | if(invite == NULL) |
212380e3 | 761 | { |
762 | if(!ConfigChannel.use_invex) | |
763 | return (ERR_INVITEONLYCHAN); | |
764 | DLINK_FOREACH(ptr, chptr->invexlist.head) | |
765 | { | |
766 | invex = ptr->data; | |
767 | if(match(invex->banstr, src_host) | |
768 | || match(invex->banstr, src_iphost) | |
769 | || match_cidr(invex->banstr, src_iphost) | |
770 | || match_extban(invex->banstr, source_p, chptr, CHFL_INVEX) | |
771 | || (use_althost && match(invex->banstr, src_althost))) | |
772 | break; | |
773 | } | |
774 | if(ptr == NULL) | |
775 | return (ERR_INVITEONLYCHAN); | |
776 | } | |
777 | } | |
778 | ||
779 | if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key))) | |
780 | return (ERR_BADCHANNELKEY); | |
781 | ||
782 | if(chptr->mode.limit && | |
783 | dlink_list_length(&chptr->members) >= (unsigned long) chptr->mode.limit) | |
1ebf4db4 | 784 | i = ERR_CHANNELISFULL; |
212380e3 | 785 | if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser)) |
1ebf4db4 | 786 | i = ERR_NEEDREGGEDNICK; |
212380e3 | 787 | /* join throttling stuff --nenolod */ |
1ebf4db4 | 788 | else if(chptr->mode.join_num > 0 && chptr->mode.join_time > 0) |
212380e3 | 789 | { |
790 | if ((CurrentTime - chptr->join_delta <= | |
791 | chptr->mode.join_time) && (chptr->join_count >= | |
792 | chptr->mode.join_num)) | |
1ebf4db4 | 793 | i = ERR_THROTTLE; |
794 | } | |
795 | ||
796 | /* allow /invite to override +l/+r/+j also -- jilles */ | |
797 | if (i != 0 && invite == NULL) | |
798 | { | |
799 | DLINK_FOREACH(invite, source_p->user->invited.head) | |
800 | { | |
801 | if(invite->data == chptr) | |
802 | break; | |
803 | } | |
804 | if (invite == NULL) | |
805 | return i; | |
212380e3 | 806 | } |
807 | ||
808 | moduledata.client = source_p; | |
809 | moduledata.chptr = chptr; | |
810 | moduledata.approved = 0; | |
811 | ||
812 | call_hook(h_can_join, &moduledata); | |
813 | ||
814 | return moduledata.approved; | |
815 | } | |
816 | ||
817 | /* can_send() | |
818 | * | |
819 | * input - user to check in channel, membership pointer | |
820 | * output - whether can explicitly send or not, else CAN_SEND_NONOP | |
821 | * side effects - | |
822 | */ | |
823 | int | |
824 | can_send(struct Channel *chptr, struct Client *source_p, struct membership *msptr) | |
825 | { | |
826 | if(IsServer(source_p) || IsService(source_p)) | |
827 | return CAN_SEND_OPV; | |
828 | ||
829 | if(MyClient(source_p) && hash_find_resv(chptr->chname) && | |
830 | !IsOper(source_p) && !IsExemptResv(source_p)) | |
831 | return CAN_SEND_NO; | |
832 | ||
833 | if(msptr == NULL) | |
834 | { | |
835 | msptr = find_channel_membership(chptr, source_p); | |
836 | ||
837 | if(msptr == NULL) | |
838 | { | |
839 | /* if its +m or +n and theyre not in the channel, | |
840 | * they cant send. we dont check bans here because | |
841 | * theres no possibility of caching them --fl | |
842 | */ | |
843 | if(chptr->mode.mode & MODE_NOPRIVMSGS || chptr->mode.mode & MODE_MODERATED) | |
844 | return CAN_SEND_NO; | |
845 | else | |
846 | return CAN_SEND_NONOP; | |
847 | } | |
848 | } | |
849 | ||
850 | if(is_chanop_voiced(msptr)) | |
851 | return CAN_SEND_OPV; | |
852 | ||
853 | if(chptr->mode.mode & MODE_MODERATED) | |
854 | return CAN_SEND_NO; | |
855 | ||
856 | if(MyClient(source_p)) | |
857 | { | |
858 | /* cached can_send */ | |
859 | if(msptr->bants == chptr->bants) | |
860 | { | |
861 | if(can_send_banned(msptr)) | |
862 | return CAN_SEND_NO; | |
863 | } | |
864 | else if(is_banned(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN | |
865 | || is_quieted(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN) | |
866 | return CAN_SEND_NO; | |
867 | } | |
868 | ||
869 | return CAN_SEND_NONOP; | |
870 | } | |
871 | ||
872 | /* find_bannickchange_channel() | |
873 | * Input: client to check | |
874 | * Output: channel preventing nick change | |
875 | */ | |
876 | struct Channel * | |
877 | find_bannickchange_channel(struct Client *client_p) | |
878 | { | |
879 | struct Channel *chptr; | |
880 | struct membership *msptr; | |
881 | dlink_node *ptr; | |
882 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
883 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
884 | ||
885 | if (!MyClient(client_p)) | |
886 | return NULL; | |
887 | ||
888 | ircsprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host); | |
889 | ircsprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost); | |
890 | ||
891 | DLINK_FOREACH(ptr, client_p->user->channel.head) | |
892 | { | |
893 | msptr = ptr->data; | |
894 | chptr = msptr->chptr; | |
895 | if (is_chanop_voiced(msptr)) | |
896 | continue; | |
897 | /* cached can_send */ | |
898 | if (msptr->bants == chptr->bants) | |
899 | { | |
900 | if (can_send_banned(msptr)) | |
901 | return chptr; | |
902 | } | |
903 | else if (is_banned(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN | |
904 | || is_quieted(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN) | |
905 | return chptr; | |
906 | } | |
907 | return NULL; | |
908 | } | |
909 | ||
910 | /* void check_spambot_warning(struct Client *source_p) | |
911 | * Input: Client to check, channel name or NULL if this is a part. | |
912 | * Output: none | |
913 | * Side-effects: Updates the client's oper_warn_count_down, warns the | |
914 | * IRC operators if necessary, and updates join_leave_countdown as | |
915 | * needed. | |
916 | */ | |
917 | void | |
918 | check_spambot_warning(struct Client *source_p, const char *name) | |
919 | { | |
920 | int t_delta; | |
921 | int decrement_count; | |
922 | if((GlobalSetOptions.spam_num && | |
923 | (source_p->localClient->join_leave_count >= GlobalSetOptions.spam_num))) | |
924 | { | |
925 | if(source_p->localClient->oper_warn_count_down > 0) | |
926 | source_p->localClient->oper_warn_count_down--; | |
927 | else | |
928 | source_p->localClient->oper_warn_count_down = 0; | |
929 | if(source_p->localClient->oper_warn_count_down == 0) | |
930 | { | |
931 | /* Its already known as a possible spambot */ | |
932 | if(name != NULL) | |
933 | sendto_realops_snomask(SNO_BOTS, L_ALL, | |
934 | "User %s (%s@%s) trying to join %s is a possible spambot", | |
935 | source_p->name, | |
63aecfb9 | 936 | source_p->username, source_p->orighost, name); |
212380e3 | 937 | else |
938 | sendto_realops_snomask(SNO_BOTS, L_ALL, | |
939 | "User %s (%s@%s) is a possible spambot", | |
940 | source_p->name, | |
63aecfb9 | 941 | source_p->username, source_p->orighost); |
212380e3 | 942 | source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
943 | } | |
944 | } | |
945 | else | |
946 | { | |
947 | if((t_delta = | |
948 | (CurrentTime - source_p->localClient->last_leave_time)) > | |
949 | JOIN_LEAVE_COUNT_EXPIRE_TIME) | |
950 | { | |
951 | decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); | |
952 | if(decrement_count > source_p->localClient->join_leave_count) | |
953 | source_p->localClient->join_leave_count = 0; | |
954 | else | |
955 | source_p->localClient->join_leave_count -= decrement_count; | |
956 | } | |
957 | else | |
958 | { | |
959 | if((CurrentTime - | |
960 | (source_p->localClient->last_join_time)) < GlobalSetOptions.spam_time) | |
961 | { | |
962 | /* oh, its a possible spambot */ | |
963 | source_p->localClient->join_leave_count++; | |
964 | } | |
965 | } | |
966 | if(name != NULL) | |
967 | source_p->localClient->last_join_time = CurrentTime; | |
968 | else | |
969 | source_p->localClient->last_leave_time = CurrentTime; | |
970 | } | |
971 | } | |
972 | ||
973 | /* check_splitmode() | |
974 | * | |
975 | * input - | |
976 | * output - | |
977 | * side effects - compares usercount and servercount against their split | |
978 | * values and adjusts splitmode accordingly | |
979 | */ | |
980 | void | |
981 | check_splitmode(void *unused) | |
982 | { | |
983 | if(splitchecking && (ConfigChannel.no_join_on_split || ConfigChannel.no_create_on_split)) | |
984 | { | |
985 | /* not split, we're being asked to check now because someone | |
986 | * has left | |
987 | */ | |
988 | if(!splitmode) | |
989 | { | |
990 | if(eob_count < split_servers || Count.total < split_users) | |
991 | { | |
992 | splitmode = 1; | |
993 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
994 | "Network split, activating splitmode"); | |
995 | eventAddIsh("check_splitmode", check_splitmode, NULL, 2); | |
996 | } | |
997 | } | |
998 | /* in splitmode, check whether its finished */ | |
999 | else if(eob_count >= split_servers && Count.total >= split_users) | |
1000 | { | |
1001 | splitmode = 0; | |
1002 | ||
1003 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
1004 | "Network rejoined, deactivating splitmode"); | |
1005 | ||
1006 | eventDelete(check_splitmode, NULL); | |
1007 | } | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | ||
1012 | /* allocate_topic() | |
1013 | * | |
1014 | * input - channel to allocate topic for | |
1015 | * output - 1 on success, else 0 | |
1016 | * side effects - channel gets a topic allocated | |
1017 | */ | |
1018 | static void | |
1019 | allocate_topic(struct Channel *chptr) | |
1020 | { | |
1021 | void *ptr; | |
1022 | ||
1023 | if(chptr == NULL) | |
1024 | return; | |
1025 | ||
1026 | ptr = BlockHeapAlloc(topic_heap); | |
1027 | ||
1028 | /* Basically we allocate one large block for the topic and | |
1029 | * the topic info. We then split it up into two and shove it | |
1030 | * in the chptr | |
1031 | */ | |
1032 | chptr->topic = ptr; | |
1033 | chptr->topic_info = (char *) ptr + TOPICLEN + 1; | |
1034 | *chptr->topic = '\0'; | |
1035 | *chptr->topic_info = '\0'; | |
1036 | } | |
1037 | ||
1038 | /* free_topic() | |
1039 | * | |
1040 | * input - channel which has topic to free | |
1041 | * output - | |
1042 | * side effects - channels topic is free'd | |
1043 | */ | |
1044 | static void | |
1045 | free_topic(struct Channel *chptr) | |
1046 | { | |
1047 | void *ptr; | |
1048 | ||
1049 | if(chptr == NULL || chptr->topic == NULL) | |
1050 | return; | |
1051 | ||
1052 | /* This is safe for now - If you change allocate_topic you | |
1053 | * MUST change this as well | |
1054 | */ | |
1055 | ptr = chptr->topic; | |
1056 | BlockHeapFree(topic_heap, ptr); | |
1057 | chptr->topic = NULL; | |
1058 | chptr->topic_info = NULL; | |
1059 | } | |
1060 | ||
1061 | /* set_channel_topic() | |
1062 | * | |
1063 | * input - channel, topic to set, topic info and topic ts | |
1064 | * output - | |
1065 | * side effects - channels topic, topic info and TS are set. | |
1066 | */ | |
1067 | void | |
1068 | set_channel_topic(struct Channel *chptr, const char *topic, const char *topic_info, time_t topicts) | |
1069 | { | |
1070 | if(strlen(topic) > 0) | |
1071 | { | |
1072 | if(chptr->topic == NULL) | |
1073 | allocate_topic(chptr); | |
1074 | strlcpy(chptr->topic, topic, TOPICLEN + 1); | |
1075 | strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN); | |
1076 | chptr->topic_time = topicts; | |
1077 | } | |
1078 | else | |
1079 | { | |
1080 | if(chptr->topic != NULL) | |
1081 | free_topic(chptr); | |
1082 | chptr->topic_time = 0; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | static const struct mode_letter | |
1087 | { | |
1088 | const unsigned int mode; | |
1089 | const unsigned char letter; | |
1090 | } flags[] = | |
1091 | { | |
1092 | {MODE_INVITEONLY, 'i'}, | |
1093 | {MODE_MODERATED, 'm'}, | |
1094 | {MODE_NOPRIVMSGS, 'n'}, | |
1095 | {MODE_PRIVATE, 'p'}, | |
1096 | {MODE_SECRET, 's'}, | |
1097 | {MODE_TOPICLIMIT, 't'}, | |
1098 | {MODE_NOCOLOR, 'c'}, | |
1099 | {MODE_FREEINVITE, 'g'}, | |
1100 | {MODE_OPMODERATE, 'z'}, | |
1101 | {MODE_EXLIMIT, 'L'}, | |
1102 | {MODE_PERMANENT, 'P'}, | |
1103 | {MODE_FREETARGET, 'F'}, | |
1104 | {MODE_DISFORWARD, 'Q'}, | |
1105 | {MODE_REGONLY, 'r'}, | |
1106 | {0, '\0'} | |
1107 | }; | |
1108 | ||
1109 | /* channel_modes() | |
1110 | * | |
1111 | * inputs - pointer to channel | |
1112 | * - pointer to client | |
1113 | * output - NONE | |
1114 | * side effects - write the "simple" list of channel modes for channel | |
1115 | * chptr onto buffer mbuf with the parameters in pbuf. | |
1116 | * | |
1117 | * Stolen from ShadowIRCd 4 --nenolod | |
1118 | */ | |
1119 | const char * | |
1120 | channel_modes(struct Channel *chptr, struct Client *client_p) | |
1121 | { | |
1122 | int i; | |
1123 | char buf1[BUFSIZE]; | |
1124 | char buf2[BUFSIZE]; | |
1125 | static char final[BUFSIZE]; | |
1126 | char *mbuf = buf1; | |
1127 | char *pbuf = buf2; | |
1128 | ||
1129 | *mbuf++ = '+'; | |
1130 | *pbuf = '\0'; | |
1131 | ||
1132 | for (i = 0; flags[i].mode; ++i) | |
1133 | if(chptr->mode.mode & flags[i].mode) | |
1134 | *mbuf++ = flags[i].letter; | |
1135 | ||
1136 | if(chptr->mode.limit) | |
1137 | { | |
1138 | *mbuf++ = 'l'; | |
1139 | ||
1140 | if(IsMember(client_p, chptr) || IsServer(client_p) || IsMe(client_p)) | |
1141 | pbuf += ircsprintf(pbuf, "%d ", chptr->mode.limit); | |
1142 | } | |
1143 | ||
1144 | if(*chptr->mode.key) | |
1145 | { | |
1146 | *mbuf++ = 'k'; | |
1147 | ||
1148 | if(*pbuf || IsMember(client_p, chptr) || IsServer(client_p) || IsMe(client_p)) | |
1149 | pbuf += ircsprintf(pbuf, "%s ", chptr->mode.key); | |
1150 | } | |
1151 | ||
1152 | if(chptr->mode.join_num) | |
1153 | { | |
1154 | *mbuf++ = 'j'; | |
1155 | ||
1156 | if(*pbuf || IsMember(client_p, chptr) || IsServer(client_p) || IsMe(client_p)) | |
1157 | pbuf += ircsprintf(pbuf, "%d:%d ", chptr->mode.join_num, | |
1158 | chptr->mode.join_time); | |
1159 | } | |
1160 | ||
1161 | if(*chptr->mode.forward && (ConfigChannel.use_forward || IsServer(client_p) || IsMe(client_p))) | |
1162 | { | |
1163 | *mbuf++ = 'f'; | |
1164 | ||
1165 | if(*pbuf || IsMember(client_p, chptr) || IsServer(client_p) || IsMe(client_p)) | |
1166 | pbuf += ircsprintf(pbuf, "%s ", chptr->mode.forward); | |
1167 | } | |
1168 | ||
1169 | *mbuf = '\0'; | |
1170 | ||
1171 | ircsprintf(final, "%s %s", buf1, buf2); | |
1172 | return final; | |
1173 | } | |
1174 | ||
1175 | /* Now lets do some stuff to keep track of what combinations of | |
1176 | * servers exist... | |
1177 | * Note that the number of combinations doubles each time you add | |
1178 | * something to this list. Each one is only quick if no servers use that | |
1179 | * combination, but if the numbers get too high here MODE will get too | |
1180 | * slow. I suggest if you get more than 7 here, you consider getting rid | |
1181 | * of some and merging or something. If it wasn't for irc+cs we would | |
1182 | * probably not even need to bother about most of these, but unfortunately | |
1183 | * we do. -A1kmm | |
1184 | */ | |
1185 | ||
1186 | /* void init_chcap_usage_counts(void) | |
1187 | * | |
1188 | * Inputs - none | |
1189 | * Output - none | |
1190 | * Side-effects - Initialises the usage counts to zero. Fills in the | |
1191 | * chcap_yes and chcap_no combination tables. | |
1192 | */ | |
1193 | void | |
1194 | init_chcap_usage_counts(void) | |
1195 | { | |
1196 | unsigned long m, c, y, n; | |
1197 | ||
1198 | memset(chcap_combos, 0, sizeof(chcap_combos)); | |
1199 | ||
1200 | /* For every possible combination */ | |
1201 | for (m = 0; m < NCHCAP_COMBOS; m++) | |
1202 | { | |
1203 | /* Check each capab */ | |
1204 | for (c = y = n = 0; c < NCHCAPS; c++) | |
1205 | { | |
1206 | if((m & (1 << c)) == 0) | |
1207 | n |= channel_capabs[c]; | |
1208 | else | |
1209 | y |= channel_capabs[c]; | |
1210 | } | |
1211 | chcap_combos[m].cap_yes = y; | |
1212 | chcap_combos[m].cap_no = n; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1217 | * Input: serv_p; The client whose capabs to register. | |
1218 | * Output: none | |
1219 | * Side-effects: Increments the usage counts for the correct capab | |
1220 | * combination. | |
1221 | */ | |
1222 | void | |
1223 | set_chcap_usage_counts(struct Client *serv_p) | |
1224 | { | |
1225 | int n; | |
1226 | ||
1227 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1228 | { | |
1229 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1230 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1231 | { | |
1232 | chcap_combos[n].count++; | |
1233 | return; | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | /* This should be impossible -A1kmm. */ | |
1238 | s_assert(0); | |
1239 | } | |
1240 | ||
1241 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1242 | * | |
1243 | * Inputs - serv_p; The client whose capabs to register. | |
1244 | * Output - none | |
1245 | * Side-effects - Decrements the usage counts for the correct capab | |
1246 | * combination. | |
1247 | */ | |
1248 | void | |
1249 | unset_chcap_usage_counts(struct Client *serv_p) | |
1250 | { | |
1251 | int n; | |
1252 | ||
1253 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1254 | { | |
1255 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1256 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1257 | { | |
1258 | /* Hopefully capabs can't change dynamically or anything... */ | |
1259 | s_assert(chcap_combos[n].count > 0); | |
1260 | ||
1261 | if(chcap_combos[n].count > 0) | |
1262 | chcap_combos[n].count--; | |
1263 | return; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | /* This should be impossible -A1kmm. */ | |
1268 | s_assert(0); | |
1269 | } | |
1270 | ||
1271 | /* void send_cap_mode_changes(struct Client *client_p, | |
1272 | * struct Client *source_p, | |
1273 | * struct Channel *chptr, int cap, int nocap) | |
1274 | * Input: The client sending(client_p), the source client(source_p), | |
1275 | * the channel to send mode changes for(chptr) | |
1276 | * Output: None. | |
1277 | * Side-effects: Sends the appropriate mode changes to capable servers. | |
1278 | * | |
1279 | * Reverted back to my original design, except that we now keep a count | |
1280 | * of the number of servers which each combination as an optimisation, so | |
1281 | * the capabs combinations which are not needed are not worked out. -A1kmm | |
1282 | */ | |
1283 | void | |
1284 | send_cap_mode_changes(struct Client *client_p, struct Client *source_p, | |
1285 | struct Channel *chptr, struct ChModeChange mode_changes[], int mode_count) | |
1286 | { | |
1287 | static char modebuf[BUFSIZE]; | |
1288 | static char parabuf[BUFSIZE]; | |
1289 | int i, mbl, pbl, nc, mc, preflen, len; | |
1290 | char *pbuf; | |
1291 | const char *arg; | |
1292 | int dir; | |
1293 | int j; | |
1294 | int cap; | |
1295 | int nocap; | |
1296 | int arglen; | |
1297 | ||
1298 | /* Now send to servers... */ | |
1299 | for (j = 0; j < NCHCAP_COMBOS; j++) | |
1300 | { | |
1301 | if(chcap_combos[j].count == 0) | |
1302 | continue; | |
1303 | ||
1304 | mc = 0; | |
1305 | nc = 0; | |
1306 | pbl = 0; | |
1307 | parabuf[0] = 0; | |
1308 | pbuf = parabuf; | |
1309 | dir = MODE_QUERY; | |
1310 | ||
1311 | cap = chcap_combos[j].cap_yes; | |
1312 | nocap = chcap_combos[j].cap_no; | |
1313 | ||
1314 | if(cap & CAP_TS6) | |
1315 | mbl = preflen = ircsprintf(modebuf, ":%s TMODE %ld %s ", | |
1316 | use_id(source_p), (long) chptr->channelts, | |
1317 | chptr->chname); | |
1318 | else | |
1319 | mbl = preflen = ircsprintf(modebuf, ":%s MODE %s ", | |
1320 | source_p->name, chptr->chname); | |
1321 | ||
1322 | /* loop the list of - modes we have */ | |
1323 | for (i = 0; i < mode_count; i++) | |
1324 | { | |
1325 | /* if they dont support the cap we need, or they do support a cap they | |
1326 | * cant have, then dont add it to the modebuf.. that way they wont see | |
1327 | * the mode | |
1328 | */ | |
1329 | if((mode_changes[i].letter == 0) || | |
1330 | ((cap & mode_changes[i].caps) != mode_changes[i].caps) | |
1331 | || ((nocap & mode_changes[i].nocaps) != mode_changes[i].nocaps)) | |
1332 | continue; | |
1333 | ||
1334 | if((cap & CAP_TS6) && !EmptyString(mode_changes[i].id)) | |
1335 | arg = mode_changes[i].id; | |
1336 | else | |
1337 | arg = mode_changes[i].arg; | |
1338 | ||
1339 | if(arg) | |
1340 | { | |
1341 | arglen = strlen(arg); | |
1342 | ||
1343 | /* dont even think about it! --fl */ | |
1344 | if(arglen > MODEBUFLEN - 5) | |
1345 | continue; | |
1346 | } | |
1347 | ||
1348 | /* if we're creeping past the buf size, we need to send it and make | |
1349 | * another line for the other modes | |
1350 | * XXX - this could give away server topology with uids being | |
1351 | * different lengths, but not much we can do, except possibly break | |
1352 | * them as if they were the longest of the nick or uid at all times, | |
1353 | * which even then won't work as we don't always know the uid -A1kmm. | |
1354 | */ | |
1355 | if(arg && ((mc == MAXMODEPARAMSSERV) || | |
1356 | ((mbl + pbl + arglen + 4) > (BUFSIZE - 3)))) | |
1357 | { | |
1358 | if(nc != 0) | |
1359 | sendto_server(client_p, chptr, cap, nocap, | |
1360 | "%s %s", modebuf, parabuf); | |
1361 | nc = 0; | |
1362 | mc = 0; | |
1363 | ||
1364 | mbl = preflen; | |
1365 | pbl = 0; | |
1366 | pbuf = parabuf; | |
1367 | parabuf[0] = 0; | |
1368 | dir = MODE_QUERY; | |
1369 | } | |
1370 | ||
1371 | if(dir != mode_changes[i].dir) | |
1372 | { | |
1373 | modebuf[mbl++] = (mode_changes[i].dir == MODE_ADD) ? '+' : '-'; | |
1374 | dir = mode_changes[i].dir; | |
1375 | } | |
1376 | ||
1377 | modebuf[mbl++] = mode_changes[i].letter; | |
1378 | modebuf[mbl] = 0; | |
1379 | nc++; | |
1380 | ||
1381 | if(arg != NULL) | |
1382 | { | |
1383 | len = ircsprintf(pbuf, "%s ", arg); | |
1384 | pbuf += len; | |
1385 | pbl += len; | |
1386 | mc++; | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | if(pbl && parabuf[pbl - 1] == ' ') | |
1391 | parabuf[pbl - 1] = 0; | |
1392 | ||
1393 | if(nc != 0) | |
1394 | sendto_server(client_p, chptr, cap, nocap, "%s %s", modebuf, parabuf); | |
1395 | } | |
1396 | } |