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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 | * | |
24 | * $Id: channel.c 3580 2007-11-07 23:45:14Z jilles $ | |
25 | */ | |
26 | ||
27 | #include "stdinc.h" | |
28 | #include "channel.h" | |
29 | #include "client.h" | |
30 | #include "common.h" | |
31 | #include "hash.h" | |
32 | #include "hook.h" | |
33 | #include "match.h" | |
34 | #include "ircd.h" | |
35 | #include "numeric.h" | |
36 | #include "s_serv.h" /* captab */ | |
37 | #include "s_user.h" | |
38 | #include "send.h" | |
39 | #include "whowas.h" | |
40 | #include "s_conf.h" /* ConfigFileEntry, ConfigChannel */ | |
41 | #include "s_newconf.h" | |
42 | #include "logger.h" | |
43 | ||
44 | extern rb_bh *channel_heap; | |
45 | extern rb_bh *ban_heap; | |
46 | extern rb_bh *topic_heap; | |
47 | extern rb_bh *member_heap; | |
48 | ||
49 | static int channel_capabs[] = { CAP_EX, CAP_IE, | |
50 | CAP_SERVICE, | |
51 | CAP_TS6 | |
52 | }; | |
53 | ||
54 | #define NCHCAPS (sizeof(channel_capabs)/sizeof(int)) | |
55 | #define NCHCAP_COMBOS (1 << NCHCAPS) | |
56 | ||
57 | static struct ChCapCombo chcap_combos[NCHCAP_COMBOS]; | |
58 | ||
59 | static void free_topic(struct Channel *chptr); | |
60 | ||
61 | static int h_can_join; | |
62 | ||
63 | /* init_channels() | |
64 | * | |
65 | * input - | |
66 | * output - | |
67 | * side effects - initialises the various blockheaps | |
68 | */ | |
69 | void | |
70 | init_channels(void) | |
71 | { | |
72 | channel_heap = rb_bh_create(sizeof(struct Channel), CHANNEL_HEAP_SIZE, "channel_heap"); | |
73 | ban_heap = rb_bh_create(sizeof(struct Ban), BAN_HEAP_SIZE, "ban_heap"); | |
74 | topic_heap = rb_bh_create(TOPICLEN + 1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE, "topic_heap"); | |
75 | member_heap = rb_bh_create(sizeof(struct membership), MEMBER_HEAP_SIZE, "member_heap"); | |
76 | ||
77 | h_can_join = register_hook("can_join"); | |
78 | } | |
79 | ||
80 | /* | |
81 | * allocate_channel - Allocates a channel | |
82 | */ | |
83 | struct Channel * | |
84 | allocate_channel(const char *chname) | |
85 | { | |
86 | struct Channel *chptr; | |
87 | chptr = rb_bh_alloc(channel_heap); | |
88 | chptr->chname = rb_strdup(chname); | |
89 | return (chptr); | |
90 | } | |
91 | ||
92 | void | |
93 | free_channel(struct Channel *chptr) | |
94 | { | |
95 | rb_free(chptr->chname); | |
96 | rb_bh_free(channel_heap, chptr); | |
97 | } | |
98 | ||
99 | struct Ban * | |
100 | allocate_ban(const char *banstr, const char *who) | |
101 | { | |
102 | struct Ban *bptr; | |
103 | bptr = rb_bh_alloc(ban_heap); | |
104 | bptr->banstr = rb_strdup(banstr); | |
105 | bptr->who = rb_strdup(who); | |
106 | ||
107 | return (bptr); | |
108 | } | |
109 | ||
110 | void | |
111 | free_ban(struct Ban *bptr) | |
112 | { | |
113 | rb_free(bptr->banstr); | |
114 | rb_free(bptr->who); | |
115 | rb_bh_free(ban_heap, bptr); | |
116 | } | |
117 | ||
118 | ||
119 | /* find_channel_membership() | |
120 | * | |
121 | * input - channel to find them in, client to find | |
122 | * output - membership of client in channel, else NULL | |
123 | * side effects - | |
124 | */ | |
125 | struct membership * | |
126 | find_channel_membership(struct Channel *chptr, struct Client *client_p) | |
127 | { | |
128 | struct membership *msptr; | |
129 | rb_dlink_node *ptr; | |
130 | ||
131 | if(!IsClient(client_p)) | |
132 | return NULL; | |
133 | ||
134 | /* Pick the most efficient list to use to be nice to things like | |
135 | * CHANSERV which could be in a large number of channels | |
136 | */ | |
137 | if(rb_dlink_list_length(&chptr->members) < rb_dlink_list_length(&client_p->user->channel)) | |
138 | { | |
139 | RB_DLINK_FOREACH(ptr, chptr->members.head) | |
140 | { | |
141 | msptr = ptr->data; | |
142 | ||
143 | if(msptr->client_p == client_p) | |
144 | return msptr; | |
145 | } | |
146 | } | |
147 | else | |
148 | { | |
149 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) | |
150 | { | |
151 | msptr = ptr->data; | |
152 | ||
153 | if(msptr->chptr == chptr) | |
154 | return msptr; | |
155 | } | |
156 | } | |
157 | ||
158 | return NULL; | |
159 | } | |
160 | ||
161 | /* find_channel_status() | |
162 | * | |
163 | * input - membership to get status for, whether we can combine flags | |
164 | * output - flags of user on channel | |
165 | * side effects - | |
166 | */ | |
167 | const char * | |
168 | find_channel_status(struct membership *msptr, int combine) | |
169 | { | |
170 | static char buffer[3]; | |
171 | char *p; | |
172 | ||
173 | p = buffer; | |
174 | ||
175 | if(is_chanop(msptr)) | |
176 | { | |
177 | if(!combine) | |
178 | return "@"; | |
179 | *p++ = '@'; | |
180 | } | |
181 | ||
182 | if(is_voiced(msptr)) | |
183 | *p++ = '+'; | |
184 | ||
185 | *p = '\0'; | |
186 | return buffer; | |
187 | } | |
188 | ||
189 | /* add_user_to_channel() | |
190 | * | |
191 | * input - channel to add client to, client to add, channel flags | |
192 | * output - | |
193 | * side effects - user is added to channel | |
194 | */ | |
195 | void | |
196 | add_user_to_channel(struct Channel *chptr, struct Client *client_p, int flags) | |
197 | { | |
198 | struct membership *msptr; | |
199 | ||
200 | s_assert(client_p->user != NULL); | |
201 | if(client_p->user == NULL) | |
202 | return; | |
203 | ||
204 | msptr = rb_bh_alloc(member_heap); | |
205 | ||
206 | msptr->chptr = chptr; | |
207 | msptr->client_p = client_p; | |
208 | msptr->flags = flags; | |
209 | ||
210 | rb_dlinkAdd(msptr, &msptr->usernode, &client_p->user->channel); | |
211 | rb_dlinkAdd(msptr, &msptr->channode, &chptr->members); | |
212 | ||
213 | if(MyClient(client_p)) | |
214 | rb_dlinkAdd(msptr, &msptr->locchannode, &chptr->locmembers); | |
215 | } | |
216 | ||
217 | /* remove_user_from_channel() | |
218 | * | |
219 | * input - membership pointer to remove from channel | |
220 | * output - | |
221 | * side effects - membership (thus user) is removed from channel | |
222 | */ | |
223 | void | |
224 | remove_user_from_channel(struct membership *msptr) | |
225 | { | |
226 | struct Client *client_p; | |
227 | struct Channel *chptr; | |
228 | s_assert(msptr != NULL); | |
229 | if(msptr == NULL) | |
230 | return; | |
231 | ||
232 | client_p = msptr->client_p; | |
233 | chptr = msptr->chptr; | |
234 | ||
235 | rb_dlinkDelete(&msptr->usernode, &client_p->user->channel); | |
236 | rb_dlinkDelete(&msptr->channode, &chptr->members); | |
237 | ||
238 | if(client_p->servptr == &me) | |
239 | rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers); | |
240 | ||
241 | chptr->users_last = rb_current_time(); | |
242 | ||
243 | if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0) | |
244 | destroy_channel(chptr); | |
245 | ||
246 | rb_bh_free(member_heap, msptr); | |
247 | ||
248 | return; | |
249 | } | |
250 | ||
251 | /* remove_user_from_channels() | |
252 | * | |
253 | * input - user to remove from all channels | |
254 | * output - | |
255 | * side effects - user is removed from all channels | |
256 | */ | |
257 | void | |
258 | remove_user_from_channels(struct Client *client_p) | |
259 | { | |
260 | struct Channel *chptr; | |
261 | struct membership *msptr; | |
262 | rb_dlink_node *ptr; | |
263 | rb_dlink_node *next_ptr; | |
264 | ||
265 | if(client_p == NULL) | |
266 | return; | |
267 | ||
268 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->user->channel.head) | |
269 | { | |
270 | msptr = ptr->data; | |
271 | chptr = msptr->chptr; | |
272 | ||
273 | rb_dlinkDelete(&msptr->channode, &chptr->members); | |
274 | ||
275 | if(client_p->servptr == &me) | |
276 | rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers); | |
277 | ||
278 | chptr->users_last = rb_current_time(); | |
279 | ||
280 | if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0) | |
281 | destroy_channel(chptr); | |
282 | ||
283 | rb_bh_free(member_heap, msptr); | |
284 | } | |
285 | ||
286 | client_p->user->channel.head = client_p->user->channel.tail = NULL; | |
287 | client_p->user->channel.length = 0; | |
288 | } | |
289 | ||
290 | /* invalidate_bancache_user() | |
291 | * | |
292 | * input - user to invalidate ban cache for | |
293 | * output - | |
294 | * side effects - ban cache is invalidated for all memberships of that user | |
295 | * to be used after a nick change | |
296 | */ | |
297 | void | |
298 | invalidate_bancache_user(struct Client *client_p) | |
299 | { | |
300 | struct membership *msptr; | |
301 | rb_dlink_node *ptr; | |
302 | ||
303 | if(client_p == NULL) | |
304 | return; | |
305 | ||
306 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) | |
307 | { | |
308 | msptr = ptr->data; | |
309 | msptr->bants = 0; | |
310 | msptr->flags &= ~CHFL_BANNED; | |
311 | } | |
312 | } | |
313 | ||
314 | /* check_channel_name() | |
315 | * | |
316 | * input - channel name | |
317 | * output - 1 if valid channel name, else 0 | |
318 | * side effects - | |
319 | */ | |
320 | int | |
321 | check_channel_name(const char *name) | |
322 | { | |
323 | s_assert(name != NULL); | |
324 | if(name == NULL) | |
325 | return 0; | |
326 | ||
327 | for (; *name; ++name) | |
328 | { | |
329 | if(!IsChanChar(*name)) | |
330 | return 0; | |
331 | } | |
332 | ||
333 | return 1; | |
334 | } | |
335 | ||
336 | /* free_channel_list() | |
337 | * | |
338 | * input - rb_dlink list to free | |
339 | * output - | |
340 | * side effects - list of b/e/I modes is cleared | |
341 | */ | |
342 | void | |
343 | free_channel_list(rb_dlink_list * list) | |
344 | { | |
345 | rb_dlink_node *ptr; | |
346 | rb_dlink_node *next_ptr; | |
347 | struct Ban *actualBan; | |
348 | ||
349 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) | |
350 | { | |
351 | actualBan = ptr->data; | |
352 | free_ban(actualBan); | |
353 | } | |
354 | ||
355 | list->head = list->tail = NULL; | |
356 | list->length = 0; | |
357 | } | |
358 | ||
359 | /* destroy_channel() | |
360 | * | |
361 | * input - channel to destroy | |
362 | * output - | |
363 | * side effects - channel is obliterated | |
364 | */ | |
365 | void | |
366 | destroy_channel(struct Channel *chptr) | |
367 | { | |
368 | rb_dlink_node *ptr, *next_ptr; | |
369 | ||
370 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head) | |
371 | { | |
372 | del_invite(chptr, ptr->data); | |
373 | } | |
374 | ||
375 | /* free all bans/exceptions/denies */ | |
376 | free_channel_list(&chptr->banlist); | |
377 | free_channel_list(&chptr->exceptlist); | |
378 | free_channel_list(&chptr->invexlist); | |
379 | free_channel_list(&chptr->quietlist); | |
380 | ||
381 | /* Free the topic */ | |
382 | free_topic(chptr); | |
383 | ||
384 | rb_dlinkDelete(&chptr->node, &global_channel_list); | |
385 | del_from_channel_hash(chptr->chname, chptr); | |
386 | free_channel(chptr); | |
387 | } | |
388 | ||
389 | /* channel_pub_or_secret() | |
390 | * | |
391 | * input - channel | |
392 | * output - "=" if public, "@" if secret, else "*" | |
393 | * side effects - | |
394 | */ | |
395 | static const char * | |
396 | channel_pub_or_secret(struct Channel *chptr) | |
397 | { | |
398 | if(PubChannel(chptr)) | |
399 | return ("="); | |
400 | else if(SecretChannel(chptr)) | |
401 | return ("@"); | |
402 | return ("*"); | |
403 | } | |
404 | ||
405 | /* channel_member_names() | |
406 | * | |
407 | * input - channel to list, client to list to, show endofnames | |
408 | * output - | |
409 | * side effects - client is given list of users on channel | |
410 | */ | |
411 | void | |
412 | channel_member_names(struct Channel *chptr, struct Client *client_p, int show_eon) | |
413 | { | |
414 | struct membership *msptr; | |
415 | struct Client *target_p; | |
416 | rb_dlink_node *ptr; | |
417 | char lbuf[BUFSIZE]; | |
418 | char *t; | |
419 | int mlen; | |
420 | int tlen; | |
421 | int cur_len; | |
422 | int is_member; | |
423 | int stack = IsCapable(client_p, CLICAP_MULTI_PREFIX); | |
424 | ||
425 | if(ShowChannel(client_p, chptr)) | |
426 | { | |
427 | is_member = IsMember(client_p, chptr); | |
428 | ||
429 | cur_len = mlen = rb_sprintf(lbuf, form_str(RPL_NAMREPLY), | |
430 | me.name, client_p->name, | |
431 | channel_pub_or_secret(chptr), chptr->chname); | |
432 | ||
433 | t = lbuf + cur_len; | |
434 | ||
435 | RB_DLINK_FOREACH(ptr, chptr->members.head) | |
436 | { | |
437 | msptr = ptr->data; | |
438 | target_p = msptr->client_p; | |
439 | ||
440 | if(IsInvisible(target_p) && !is_member) | |
441 | continue; | |
442 | ||
443 | /* space, possible "@+" prefix */ | |
444 | if(cur_len + strlen(target_p->name) + 3 >= BUFSIZE - 3) | |
445 | { | |
446 | *(t - 1) = '\0'; | |
447 | sendto_one(client_p, "%s", lbuf); | |
448 | cur_len = mlen; | |
449 | t = lbuf + mlen; | |
450 | } | |
451 | ||
452 | tlen = rb_sprintf(t, "%s%s ", find_channel_status(msptr, stack), | |
453 | target_p->name); | |
454 | ||
455 | cur_len += tlen; | |
456 | t += tlen; | |
457 | } | |
458 | ||
459 | /* The old behaviour here was to always output our buffer, | |
460 | * even if there are no clients we can show. This happens | |
461 | * when a client does "NAMES" with no parameters, and all | |
462 | * the clients on a -sp channel are +i. I dont see a good | |
463 | * reason for keeping that behaviour, as it just wastes | |
464 | * bandwidth. --anfl | |
465 | */ | |
466 | if(cur_len != mlen) | |
467 | { | |
468 | *(t - 1) = '\0'; | |
469 | sendto_one(client_p, "%s", lbuf); | |
470 | } | |
471 | } | |
472 | ||
473 | if(show_eon) | |
474 | sendto_one(client_p, form_str(RPL_ENDOFNAMES), | |
475 | me.name, client_p->name, chptr->chname); | |
476 | } | |
477 | ||
478 | /* del_invite() | |
479 | * | |
480 | * input - channel to remove invite from, client to remove | |
481 | * output - | |
482 | * side effects - user is removed from invite list, if exists | |
483 | */ | |
484 | void | |
485 | del_invite(struct Channel *chptr, struct Client *who) | |
486 | { | |
487 | rb_dlinkFindDestroy(who, &chptr->invites); | |
488 | rb_dlinkFindDestroy(chptr, &who->user->invited); | |
489 | } | |
490 | ||
491 | /* is_banned() | |
492 | * | |
493 | * input - channel to check bans for, user to check bans against | |
494 | * optional prebuilt buffers | |
495 | * output - 1 if banned, else 0 | |
496 | * side effects - | |
497 | */ | |
498 | int | |
499 | is_banned(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
500 | const char *s, const char *s2) | |
501 | { | |
502 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
503 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
504 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
505 | char *s3 = NULL; | |
506 | rb_dlink_node *ptr; | |
507 | struct Ban *actualBan = NULL; | |
508 | struct Ban *actualExcept = NULL; | |
509 | ||
510 | if(!MyClient(who)) | |
511 | return 0; | |
512 | ||
513 | /* if the buffers havent been built, do it here */ | |
514 | if(s == NULL) | |
515 | { | |
516 | rb_sprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); | |
517 | rb_sprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
518 | ||
519 | s = src_host; | |
520 | s2 = src_iphost; | |
521 | } | |
522 | if(who->localClient->mangledhost != NULL) | |
523 | { | |
524 | /* if host mangling mode enabled, also check their real host */ | |
525 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
526 | { | |
527 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); | |
528 | s3 = src_althost; | |
529 | } | |
530 | /* if host mangling mode not enabled and no other spoof, | |
531 | * also check the mangled form of their host */ | |
532 | else if (!IsDynSpoof(who)) | |
533 | { | |
534 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); | |
535 | s3 = src_althost; | |
536 | } | |
537 | } | |
538 | ||
539 | RB_DLINK_FOREACH(ptr, chptr->banlist.head) | |
540 | { | |
541 | actualBan = ptr->data; | |
542 | if(match(actualBan->banstr, s) || | |
543 | match(actualBan->banstr, s2) || | |
544 | match_cidr(actualBan->banstr, s2) || | |
545 | match_extban(actualBan->banstr, who, chptr, CHFL_BAN) || | |
546 | (s3 != NULL && match(actualBan->banstr, s3))) | |
547 | break; | |
548 | else | |
549 | actualBan = NULL; | |
550 | } | |
551 | ||
552 | if((actualBan != NULL) && ConfigChannel.use_except) | |
553 | { | |
554 | RB_DLINK_FOREACH(ptr, chptr->exceptlist.head) | |
555 | { | |
556 | actualExcept = ptr->data; | |
557 | ||
558 | /* theyre exempted.. */ | |
559 | if(match(actualExcept->banstr, s) || | |
560 | match(actualExcept->banstr, s2) || | |
561 | match_cidr(actualExcept->banstr, s2) || | |
562 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
563 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
564 | { | |
565 | /* cache the fact theyre not banned */ | |
566 | if(msptr != NULL) | |
567 | { | |
568 | msptr->bants = chptr->bants; | |
569 | msptr->flags &= ~CHFL_BANNED; | |
570 | } | |
571 | ||
572 | return CHFL_EXCEPTION; | |
573 | } | |
574 | } | |
575 | } | |
576 | ||
577 | /* cache the banned/not banned status */ | |
578 | if(msptr != NULL) | |
579 | { | |
580 | msptr->bants = chptr->bants; | |
581 | ||
582 | if(actualBan != NULL) | |
583 | { | |
584 | msptr->flags |= CHFL_BANNED; | |
585 | return CHFL_BAN; | |
586 | } | |
587 | else | |
588 | { | |
589 | msptr->flags &= ~CHFL_BANNED; | |
590 | return 0; | |
591 | } | |
592 | } | |
593 | ||
594 | return ((actualBan ? CHFL_BAN : 0)); | |
595 | } | |
596 | ||
597 | /* is_quieted() | |
598 | * | |
599 | * input - channel to check bans for, user to check bans against | |
600 | * optional prebuilt buffers | |
601 | * output - 1 if banned, else 0 | |
602 | * side effects - | |
603 | */ | |
604 | int | |
605 | is_quieted(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
606 | const char *s, const char *s2) | |
607 | { | |
608 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
609 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
610 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
611 | char *s3 = NULL; | |
612 | rb_dlink_node *ptr; | |
613 | struct Ban *actualBan = NULL; | |
614 | struct Ban *actualExcept = NULL; | |
615 | ||
616 | if(!MyClient(who)) | |
617 | return 0; | |
618 | ||
619 | /* if the buffers havent been built, do it here */ | |
620 | if(s == NULL) | |
621 | { | |
622 | rb_sprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); | |
623 | rb_sprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
624 | ||
625 | s = src_host; | |
626 | s2 = src_iphost; | |
627 | } | |
628 | if(who->localClient->mangledhost != NULL) | |
629 | { | |
630 | /* if host mangling mode enabled, also check their real host */ | |
631 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
632 | { | |
633 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); | |
634 | s3 = src_althost; | |
635 | } | |
636 | /* if host mangling mode not enabled and no other spoof, | |
637 | * also check the mangled form of their host */ | |
638 | else if (!IsDynSpoof(who)) | |
639 | { | |
640 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); | |
641 | s3 = src_althost; | |
642 | } | |
643 | } | |
644 | ||
645 | RB_DLINK_FOREACH(ptr, chptr->quietlist.head) | |
646 | { | |
647 | actualBan = ptr->data; | |
648 | if(match(actualBan->banstr, s) || | |
649 | match(actualBan->banstr, s2) || | |
650 | match_cidr(actualBan->banstr, s2) || | |
651 | match_extban(actualBan->banstr, who, chptr, CHFL_QUIET) || | |
652 | (s3 != NULL && match(actualBan->banstr, s3))) | |
653 | break; | |
654 | else | |
655 | actualBan = NULL; | |
656 | } | |
657 | ||
658 | if((actualBan != NULL) && ConfigChannel.use_except) | |
659 | { | |
660 | RB_DLINK_FOREACH(ptr, chptr->exceptlist.head) | |
661 | { | |
662 | actualExcept = ptr->data; | |
663 | ||
664 | /* theyre exempted.. */ | |
665 | if(match(actualExcept->banstr, s) || | |
666 | match(actualExcept->banstr, s2) || | |
667 | match_cidr(actualExcept->banstr, s2) || | |
668 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
669 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
670 | { | |
671 | /* cache the fact theyre not banned */ | |
672 | if(msptr != NULL) | |
673 | { | |
674 | msptr->bants = chptr->bants; | |
675 | msptr->flags &= ~CHFL_BANNED; | |
676 | } | |
677 | ||
678 | return CHFL_EXCEPTION; | |
679 | } | |
680 | } | |
681 | } | |
682 | ||
683 | /* cache the banned/not banned status */ | |
684 | if(msptr != NULL) | |
685 | { | |
686 | msptr->bants = chptr->bants; | |
687 | ||
688 | if(actualBan != NULL) | |
689 | { | |
690 | msptr->flags |= CHFL_BANNED; | |
691 | return CHFL_BAN; | |
692 | } | |
693 | else | |
694 | { | |
695 | msptr->flags &= ~CHFL_BANNED; | |
696 | return 0; | |
697 | } | |
698 | } | |
699 | ||
700 | return ((actualBan ? CHFL_BAN : 0)); | |
701 | } | |
702 | ||
703 | /* can_join() | |
704 | * | |
705 | * input - client to check, channel to check for, key | |
706 | * output - reason for not being able to join, else 0 | |
707 | * side effects - | |
708 | */ | |
709 | int | |
710 | can_join(struct Client *source_p, struct Channel *chptr, char *key) | |
711 | { | |
712 | rb_dlink_node *invite = NULL; | |
713 | rb_dlink_node *ptr; | |
714 | struct Ban *invex = NULL; | |
715 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
716 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
717 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
718 | int use_althost = 0; | |
719 | int i = 0; | |
720 | hook_data_channel moduledata; | |
721 | ||
722 | s_assert(source_p->localClient != NULL); | |
723 | ||
724 | rb_sprintf(src_host, "%s!%s@%s", source_p->name, source_p->username, source_p->host); | |
725 | rb_sprintf(src_iphost, "%s!%s@%s", source_p->name, source_p->username, source_p->sockhost); | |
726 | if(source_p->localClient->mangledhost != NULL) | |
727 | { | |
728 | /* if host mangling mode enabled, also check their real host */ | |
729 | if(!strcmp(source_p->host, source_p->localClient->mangledhost)) | |
730 | { | |
731 | rb_sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->orighost); | |
732 | use_althost = 1; | |
733 | } | |
734 | /* if host mangling mode not enabled and no other spoof, | |
735 | * also check the mangled form of their host */ | |
736 | else if (!IsDynSpoof(source_p)) | |
737 | { | |
738 | rb_sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->localClient->mangledhost); | |
739 | use_althost = 1; | |
740 | } | |
741 | } | |
742 | ||
743 | if((is_banned(chptr, source_p, NULL, src_host, src_iphost)) == CHFL_BAN) | |
744 | return (ERR_BANNEDFROMCHAN); | |
745 | ||
746 | if(chptr->mode.mode & MODE_INVITEONLY) | |
747 | { | |
748 | RB_DLINK_FOREACH(invite, source_p->user->invited.head) | |
749 | { | |
750 | if(invite->data == chptr) | |
751 | break; | |
752 | } | |
753 | if(invite == NULL) | |
754 | { | |
755 | if(!ConfigChannel.use_invex) | |
756 | return (ERR_INVITEONLYCHAN); | |
757 | RB_DLINK_FOREACH(ptr, chptr->invexlist.head) | |
758 | { | |
759 | invex = ptr->data; | |
760 | if(match(invex->banstr, src_host) | |
761 | || match(invex->banstr, src_iphost) | |
762 | || match_cidr(invex->banstr, src_iphost) | |
763 | || match_extban(invex->banstr, source_p, chptr, CHFL_INVEX) | |
764 | || (use_althost && match(invex->banstr, src_althost))) | |
765 | break; | |
766 | } | |
767 | if(ptr == NULL) | |
768 | return (ERR_INVITEONLYCHAN); | |
769 | } | |
770 | } | |
771 | ||
772 | if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key))) | |
773 | return (ERR_BADCHANNELKEY); | |
774 | ||
775 | if(chptr->mode.limit && | |
776 | rb_dlink_list_length(&chptr->members) >= (unsigned long) chptr->mode.limit) | |
777 | i = ERR_CHANNELISFULL; | |
778 | if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser)) | |
779 | i = ERR_NEEDREGGEDNICK; | |
780 | /* join throttling stuff --nenolod */ | |
781 | else if(chptr->mode.join_num > 0 && chptr->mode.join_time > 0) | |
782 | { | |
783 | if ((rb_current_time() - chptr->join_delta <= | |
784 | chptr->mode.join_time) && (chptr->join_count >= | |
785 | chptr->mode.join_num)) | |
786 | i = ERR_THROTTLE; | |
787 | } | |
788 | ||
789 | /* allow /invite to override +l/+r/+j also -- jilles */ | |
790 | if (i != 0 && invite == NULL) | |
791 | { | |
792 | RB_DLINK_FOREACH(invite, source_p->user->invited.head) | |
793 | { | |
794 | if(invite->data == chptr) | |
795 | break; | |
796 | } | |
797 | if (invite == NULL) | |
798 | return i; | |
799 | } | |
800 | ||
801 | moduledata.client = source_p; | |
802 | moduledata.chptr = chptr; | |
803 | moduledata.approved = 0; | |
804 | ||
805 | call_hook(h_can_join, &moduledata); | |
806 | ||
807 | return moduledata.approved; | |
808 | } | |
809 | ||
810 | /* can_send() | |
811 | * | |
812 | * input - user to check in channel, membership pointer | |
813 | * output - whether can explicitly send or not, else CAN_SEND_NONOP | |
814 | * side effects - | |
815 | */ | |
816 | int | |
817 | can_send(struct Channel *chptr, struct Client *source_p, struct membership *msptr) | |
818 | { | |
819 | if(IsServer(source_p) || IsService(source_p)) | |
820 | return CAN_SEND_OPV; | |
821 | ||
822 | if(MyClient(source_p) && hash_find_resv(chptr->chname) && | |
823 | !IsOper(source_p) && !IsExemptResv(source_p)) | |
824 | return CAN_SEND_NO; | |
825 | ||
826 | if(msptr == NULL) | |
827 | { | |
828 | msptr = find_channel_membership(chptr, source_p); | |
829 | ||
830 | if(msptr == NULL) | |
831 | { | |
832 | /* if its +m or +n and theyre not in the channel, | |
833 | * they cant send. we dont check bans here because | |
834 | * theres no possibility of caching them --fl | |
835 | */ | |
836 | if(chptr->mode.mode & MODE_NOPRIVMSGS || chptr->mode.mode & MODE_MODERATED) | |
837 | return CAN_SEND_NO; | |
838 | else | |
839 | return CAN_SEND_NONOP; | |
840 | } | |
841 | } | |
842 | ||
843 | if(is_chanop_voiced(msptr)) | |
844 | return CAN_SEND_OPV; | |
845 | ||
846 | if(chptr->mode.mode & MODE_MODERATED) | |
847 | return CAN_SEND_NO; | |
848 | ||
849 | if(MyClient(source_p)) | |
850 | { | |
851 | /* cached can_send */ | |
852 | if(msptr->bants == chptr->bants) | |
853 | { | |
854 | if(can_send_banned(msptr)) | |
855 | return CAN_SEND_NO; | |
856 | } | |
857 | else if(is_banned(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN | |
858 | || is_quieted(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN) | |
859 | return CAN_SEND_NO; | |
860 | } | |
861 | ||
862 | return CAN_SEND_NONOP; | |
863 | } | |
864 | ||
865 | /* find_bannickchange_channel() | |
866 | * Input: client to check | |
867 | * Output: channel preventing nick change | |
868 | */ | |
869 | struct Channel * | |
870 | find_bannickchange_channel(struct Client *client_p) | |
871 | { | |
872 | struct Channel *chptr; | |
873 | struct membership *msptr; | |
874 | rb_dlink_node *ptr; | |
875 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
876 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
877 | ||
878 | if (!MyClient(client_p)) | |
879 | return NULL; | |
880 | ||
881 | rb_sprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host); | |
882 | rb_sprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost); | |
883 | ||
884 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) | |
885 | { | |
886 | msptr = ptr->data; | |
887 | chptr = msptr->chptr; | |
888 | if (is_chanop_voiced(msptr)) | |
889 | continue; | |
890 | /* cached can_send */ | |
891 | if (msptr->bants == chptr->bants) | |
892 | { | |
893 | if (can_send_banned(msptr)) | |
894 | return chptr; | |
895 | } | |
896 | else if (is_banned(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN | |
897 | || is_quieted(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN) | |
898 | return chptr; | |
899 | } | |
900 | return NULL; | |
901 | } | |
902 | ||
903 | /* void check_spambot_warning(struct Client *source_p) | |
904 | * Input: Client to check, channel name or NULL if this is a part. | |
905 | * Output: none | |
906 | * Side-effects: Updates the client's oper_warn_count_down, warns the | |
907 | * IRC operators if necessary, and updates join_leave_countdown as | |
908 | * needed. | |
909 | */ | |
910 | void | |
911 | check_spambot_warning(struct Client *source_p, const char *name) | |
912 | { | |
913 | int t_delta; | |
914 | int decrement_count; | |
915 | if((GlobalSetOptions.spam_num && | |
916 | (source_p->localClient->join_leave_count >= GlobalSetOptions.spam_num))) | |
917 | { | |
918 | if(source_p->localClient->oper_warn_count_down > 0) | |
919 | source_p->localClient->oper_warn_count_down--; | |
920 | else | |
921 | source_p->localClient->oper_warn_count_down = 0; | |
922 | if(source_p->localClient->oper_warn_count_down == 0) | |
923 | { | |
924 | /* Its already known as a possible spambot */ | |
925 | if(name != NULL) | |
926 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, | |
927 | "User %s (%s@%s) trying to join %s is a possible spambot", | |
928 | source_p->name, | |
929 | source_p->username, source_p->orighost, name); | |
930 | else | |
931 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, | |
932 | "User %s (%s@%s) is a possible spambot", | |
933 | source_p->name, | |
934 | source_p->username, source_p->orighost); | |
935 | source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; | |
936 | } | |
937 | } | |
938 | else | |
939 | { | |
940 | if((t_delta = | |
941 | (rb_current_time() - source_p->localClient->last_leave_time)) > | |
942 | JOIN_LEAVE_COUNT_EXPIRE_TIME) | |
943 | { | |
944 | decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); | |
945 | if(decrement_count > source_p->localClient->join_leave_count) | |
946 | source_p->localClient->join_leave_count = 0; | |
947 | else | |
948 | source_p->localClient->join_leave_count -= decrement_count; | |
949 | } | |
950 | else | |
951 | { | |
952 | if((rb_current_time() - | |
953 | (source_p->localClient->last_join_time)) < GlobalSetOptions.spam_time) | |
954 | { | |
955 | /* oh, its a possible spambot */ | |
956 | source_p->localClient->join_leave_count++; | |
957 | } | |
958 | } | |
959 | if(name != NULL) | |
960 | source_p->localClient->last_join_time = rb_current_time(); | |
961 | else | |
962 | source_p->localClient->last_leave_time = rb_current_time(); | |
963 | } | |
964 | } | |
965 | ||
966 | /* check_splitmode() | |
967 | * | |
968 | * input - | |
969 | * output - | |
970 | * side effects - compares usercount and servercount against their split | |
971 | * values and adjusts splitmode accordingly | |
972 | */ | |
973 | void | |
974 | check_splitmode(void *unused) | |
975 | { | |
976 | if(splitchecking && (ConfigChannel.no_join_on_split || ConfigChannel.no_create_on_split)) | |
977 | { | |
978 | /* not split, we're being asked to check now because someone | |
979 | * has left | |
980 | */ | |
981 | if(!splitmode) | |
982 | { | |
983 | if(eob_count < split_servers || Count.total < split_users) | |
984 | { | |
985 | splitmode = 1; | |
986 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
987 | "Network split, activating splitmode"); | |
988 | check_splitmode_ev = rb_event_addish("check_splitmode", check_splitmode, NULL, 2); | |
989 | } | |
990 | } | |
991 | /* in splitmode, check whether its finished */ | |
992 | else if(eob_count >= split_servers && Count.total >= split_users) | |
993 | { | |
994 | splitmode = 0; | |
995 | ||
996 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
997 | "Network rejoined, deactivating splitmode"); | |
998 | ||
999 | rb_event_delete(check_splitmode_ev); | |
1000 | } | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | ||
1005 | /* allocate_topic() | |
1006 | * | |
1007 | * input - channel to allocate topic for | |
1008 | * output - 1 on success, else 0 | |
1009 | * side effects - channel gets a topic allocated | |
1010 | */ | |
1011 | static void | |
1012 | allocate_topic(struct Channel *chptr) | |
1013 | { | |
1014 | void *ptr; | |
1015 | ||
1016 | if(chptr == NULL) | |
1017 | return; | |
1018 | ||
1019 | ptr = rb_bh_alloc(topic_heap); | |
1020 | ||
1021 | /* Basically we allocate one large block for the topic and | |
1022 | * the topic info. We then split it up into two and shove it | |
1023 | * in the chptr | |
1024 | */ | |
1025 | chptr->topic = ptr; | |
1026 | chptr->topic_info = (char *) ptr + TOPICLEN + 1; | |
1027 | *chptr->topic = '\0'; | |
1028 | *chptr->topic_info = '\0'; | |
1029 | } | |
1030 | ||
1031 | /* free_topic() | |
1032 | * | |
1033 | * input - channel which has topic to free | |
1034 | * output - | |
1035 | * side effects - channels topic is free'd | |
1036 | */ | |
1037 | static void | |
1038 | free_topic(struct Channel *chptr) | |
1039 | { | |
1040 | void *ptr; | |
1041 | ||
1042 | if(chptr == NULL || chptr->topic == NULL) | |
1043 | return; | |
1044 | ||
1045 | /* This is safe for now - If you change allocate_topic you | |
1046 | * MUST change this as well | |
1047 | */ | |
1048 | ptr = chptr->topic; | |
1049 | rb_bh_free(topic_heap, ptr); | |
1050 | chptr->topic = NULL; | |
1051 | chptr->topic_info = NULL; | |
1052 | } | |
1053 | ||
1054 | /* set_channel_topic() | |
1055 | * | |
1056 | * input - channel, topic to set, topic info and topic ts | |
1057 | * output - | |
1058 | * side effects - channels topic, topic info and TS are set. | |
1059 | */ | |
1060 | void | |
1061 | set_channel_topic(struct Channel *chptr, const char *topic, const char *topic_info, time_t topicts) | |
1062 | { | |
1063 | if(strlen(topic) > 0) | |
1064 | { | |
1065 | if(chptr->topic == NULL) | |
1066 | allocate_topic(chptr); | |
1067 | rb_strlcpy(chptr->topic, topic, TOPICLEN + 1); | |
1068 | rb_strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN); | |
1069 | chptr->topic_time = topicts; | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | if(chptr->topic != NULL) | |
1074 | free_topic(chptr); | |
1075 | chptr->topic_time = 0; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | const struct mode_letter chmode_flags[] = | |
1080 | { | |
1081 | {MODE_INVITEONLY, 'i'}, | |
1082 | {MODE_MODERATED, 'm'}, | |
1083 | {MODE_NOPRIVMSGS, 'n'}, | |
1084 | {MODE_PRIVATE, 'p'}, | |
1085 | {MODE_SECRET, 's'}, | |
1086 | {MODE_TOPICLIMIT, 't'}, | |
1087 | {MODE_NOCOLOR, 'c'}, | |
1088 | {MODE_FREEINVITE, 'g'}, | |
1089 | {MODE_OPMODERATE, 'z'}, | |
1090 | {MODE_EXLIMIT, 'L'}, | |
1091 | {MODE_PERMANENT, 'P'}, | |
1092 | {MODE_FREETARGET, 'F'}, | |
1093 | {MODE_DISFORWARD, 'Q'}, | |
1094 | {MODE_REGONLY, 'r'}, | |
1095 | {0, '\0'} | |
1096 | }; | |
1097 | ||
1098 | /* channel_modes() | |
1099 | * | |
1100 | * inputs - pointer to channel | |
1101 | * - pointer to client | |
1102 | * output - string with simple modes | |
1103 | * side effects - result from previous calls overwritten | |
1104 | * | |
1105 | * Stolen from ShadowIRCd 4 --nenolod | |
1106 | */ | |
1107 | const char * | |
1108 | channel_modes(struct Channel *chptr, struct Client *client_p) | |
1109 | { | |
1110 | int i; | |
1111 | char buf1[BUFSIZE]; | |
1112 | char buf2[BUFSIZE]; | |
1113 | static char final[BUFSIZE]; | |
1114 | char *mbuf = buf1; | |
1115 | char *pbuf = buf2; | |
1116 | ||
1117 | *mbuf++ = '+'; | |
1118 | *pbuf = '\0'; | |
1119 | ||
1120 | for (i = 0; chmode_flags[i].mode; ++i) | |
1121 | if(chptr->mode.mode & chmode_flags[i].mode) | |
1122 | *mbuf++ = chmode_flags[i].letter; | |
1123 | ||
1124 | if(chptr->mode.limit) | |
1125 | { | |
1126 | *mbuf++ = 'l'; | |
1127 | ||
1128 | if(!IsClient(client_p) || IsMember(client_p, chptr)) | |
1129 | pbuf += rb_sprintf(pbuf, " %d", chptr->mode.limit); | |
1130 | } | |
1131 | ||
1132 | if(*chptr->mode.key) | |
1133 | { | |
1134 | *mbuf++ = 'k'; | |
1135 | ||
1136 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) | |
1137 | pbuf += rb_sprintf(pbuf, " %s", chptr->mode.key); | |
1138 | } | |
1139 | ||
1140 | if(chptr->mode.join_num) | |
1141 | { | |
1142 | *mbuf++ = 'j'; | |
1143 | ||
1144 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) | |
1145 | pbuf += rb_sprintf(pbuf, " %d:%d", chptr->mode.join_num, | |
1146 | chptr->mode.join_time); | |
1147 | } | |
1148 | ||
1149 | if(*chptr->mode.forward && (ConfigChannel.use_forward || !IsClient(client_p))) | |
1150 | { | |
1151 | *mbuf++ = 'f'; | |
1152 | ||
1153 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) | |
1154 | pbuf += rb_sprintf(pbuf, " %s", chptr->mode.forward); | |
1155 | } | |
1156 | ||
1157 | *mbuf = '\0'; | |
1158 | ||
1159 | rb_strlcpy(final, buf1, sizeof final); | |
1160 | rb_strlcat(final, buf2, sizeof final); | |
1161 | return final; | |
1162 | } | |
1163 | ||
1164 | /* Now lets do some stuff to keep track of what combinations of | |
1165 | * servers exist... | |
1166 | * Note that the number of combinations doubles each time you add | |
1167 | * something to this list. Each one is only quick if no servers use that | |
1168 | * combination, but if the numbers get too high here MODE will get too | |
1169 | * slow. I suggest if you get more than 7 here, you consider getting rid | |
1170 | * of some and merging or something. If it wasn't for irc+cs we would | |
1171 | * probably not even need to bother about most of these, but unfortunately | |
1172 | * we do. -A1kmm | |
1173 | */ | |
1174 | ||
1175 | /* void init_chcap_usage_counts(void) | |
1176 | * | |
1177 | * Inputs - none | |
1178 | * Output - none | |
1179 | * Side-effects - Initialises the usage counts to zero. Fills in the | |
1180 | * chcap_yes and chcap_no combination tables. | |
1181 | */ | |
1182 | void | |
1183 | init_chcap_usage_counts(void) | |
1184 | { | |
1185 | unsigned long m, c, y, n; | |
1186 | ||
1187 | memset(chcap_combos, 0, sizeof(chcap_combos)); | |
1188 | ||
1189 | /* For every possible combination */ | |
1190 | for (m = 0; m < NCHCAP_COMBOS; m++) | |
1191 | { | |
1192 | /* Check each capab */ | |
1193 | for (c = y = n = 0; c < NCHCAPS; c++) | |
1194 | { | |
1195 | if((m & (1 << c)) == 0) | |
1196 | n |= channel_capabs[c]; | |
1197 | else | |
1198 | y |= channel_capabs[c]; | |
1199 | } | |
1200 | chcap_combos[m].cap_yes = y; | |
1201 | chcap_combos[m].cap_no = n; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1206 | * Input: serv_p; The client whose capabs to register. | |
1207 | * Output: none | |
1208 | * Side-effects: Increments the usage counts for the correct capab | |
1209 | * combination. | |
1210 | */ | |
1211 | void | |
1212 | set_chcap_usage_counts(struct Client *serv_p) | |
1213 | { | |
1214 | int n; | |
1215 | ||
1216 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1217 | { | |
1218 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1219 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1220 | { | |
1221 | chcap_combos[n].count++; | |
1222 | return; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | /* This should be impossible -A1kmm. */ | |
1227 | s_assert(0); | |
1228 | } | |
1229 | ||
1230 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1231 | * | |
1232 | * Inputs - serv_p; The client whose capabs to register. | |
1233 | * Output - none | |
1234 | * Side-effects - Decrements the usage counts for the correct capab | |
1235 | * combination. | |
1236 | */ | |
1237 | void | |
1238 | unset_chcap_usage_counts(struct Client *serv_p) | |
1239 | { | |
1240 | int n; | |
1241 | ||
1242 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1243 | { | |
1244 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1245 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1246 | { | |
1247 | /* Hopefully capabs can't change dynamically or anything... */ | |
1248 | s_assert(chcap_combos[n].count > 0); | |
1249 | ||
1250 | if(chcap_combos[n].count > 0) | |
1251 | chcap_combos[n].count--; | |
1252 | return; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | /* This should be impossible -A1kmm. */ | |
1257 | s_assert(0); | |
1258 | } | |
1259 | ||
1260 | /* void send_cap_mode_changes(struct Client *client_p, | |
1261 | * struct Client *source_p, | |
1262 | * struct Channel *chptr, int cap, int nocap) | |
1263 | * Input: The client sending(client_p), the source client(source_p), | |
1264 | * the channel to send mode changes for(chptr) | |
1265 | * Output: None. | |
1266 | * Side-effects: Sends the appropriate mode changes to capable servers. | |
1267 | * | |
1268 | * Reverted back to my original design, except that we now keep a count | |
1269 | * of the number of servers which each combination as an optimisation, so | |
1270 | * the capabs combinations which are not needed are not worked out. -A1kmm | |
1271 | */ | |
1272 | void | |
1273 | send_cap_mode_changes(struct Client *client_p, struct Client *source_p, | |
1274 | struct Channel *chptr, struct ChModeChange mode_changes[], int mode_count) | |
1275 | { | |
1276 | static char modebuf[BUFSIZE]; | |
1277 | static char parabuf[BUFSIZE]; | |
1278 | int i, mbl, pbl, nc, mc, preflen, len; | |
1279 | char *pbuf; | |
1280 | const char *arg; | |
1281 | int dir; | |
1282 | int j; | |
1283 | int cap; | |
1284 | int nocap; | |
1285 | int arglen; | |
1286 | ||
1287 | /* Now send to servers... */ | |
1288 | for (j = 0; j < NCHCAP_COMBOS; j++) | |
1289 | { | |
1290 | if(chcap_combos[j].count == 0) | |
1291 | continue; | |
1292 | ||
1293 | mc = 0; | |
1294 | nc = 0; | |
1295 | pbl = 0; | |
1296 | parabuf[0] = 0; | |
1297 | pbuf = parabuf; | |
1298 | dir = MODE_QUERY; | |
1299 | ||
1300 | cap = chcap_combos[j].cap_yes; | |
1301 | nocap = chcap_combos[j].cap_no; | |
1302 | ||
1303 | if(cap & CAP_TS6) | |
1304 | mbl = preflen = rb_sprintf(modebuf, ":%s TMODE %ld %s ", | |
1305 | use_id(source_p), (long) chptr->channelts, | |
1306 | chptr->chname); | |
1307 | else | |
1308 | mbl = preflen = rb_sprintf(modebuf, ":%s MODE %s ", | |
1309 | source_p->name, chptr->chname); | |
1310 | ||
1311 | /* loop the list of - modes we have */ | |
1312 | for (i = 0; i < mode_count; i++) | |
1313 | { | |
1314 | /* if they dont support the cap we need, or they do support a cap they | |
1315 | * cant have, then dont add it to the modebuf.. that way they wont see | |
1316 | * the mode | |
1317 | */ | |
1318 | if((mode_changes[i].letter == 0) || | |
1319 | ((cap & mode_changes[i].caps) != mode_changes[i].caps) | |
1320 | || ((nocap & mode_changes[i].nocaps) != mode_changes[i].nocaps)) | |
1321 | continue; | |
1322 | ||
1323 | if((cap & CAP_TS6) && !EmptyString(mode_changes[i].id)) | |
1324 | arg = mode_changes[i].id; | |
1325 | else | |
1326 | arg = mode_changes[i].arg; | |
1327 | ||
1328 | if(arg) | |
1329 | { | |
1330 | arglen = strlen(arg); | |
1331 | ||
1332 | /* dont even think about it! --fl */ | |
1333 | if(arglen > MODEBUFLEN - 5) | |
1334 | continue; | |
1335 | } | |
1336 | ||
1337 | /* if we're creeping past the buf size, we need to send it and make | |
1338 | * another line for the other modes | |
1339 | * XXX - this could give away server topology with uids being | |
1340 | * different lengths, but not much we can do, except possibly break | |
1341 | * them as if they were the longest of the nick or uid at all times, | |
1342 | * which even then won't work as we don't always know the uid -A1kmm. | |
1343 | */ | |
1344 | if(arg && ((mc == MAXMODEPARAMSSERV) || | |
1345 | ((mbl + pbl + arglen + 4) > (BUFSIZE - 3)))) | |
1346 | { | |
1347 | if(nc != 0) | |
1348 | sendto_server(client_p, chptr, cap, nocap, | |
1349 | "%s %s", modebuf, parabuf); | |
1350 | nc = 0; | |
1351 | mc = 0; | |
1352 | ||
1353 | mbl = preflen; | |
1354 | pbl = 0; | |
1355 | pbuf = parabuf; | |
1356 | parabuf[0] = 0; | |
1357 | dir = MODE_QUERY; | |
1358 | } | |
1359 | ||
1360 | if(dir != mode_changes[i].dir) | |
1361 | { | |
1362 | modebuf[mbl++] = (mode_changes[i].dir == MODE_ADD) ? '+' : '-'; | |
1363 | dir = mode_changes[i].dir; | |
1364 | } | |
1365 | ||
1366 | modebuf[mbl++] = mode_changes[i].letter; | |
1367 | modebuf[mbl] = 0; | |
1368 | nc++; | |
1369 | ||
1370 | if(arg != NULL) | |
1371 | { | |
1372 | len = rb_sprintf(pbuf, "%s ", arg); | |
1373 | pbuf += len; | |
1374 | pbl += len; | |
1375 | mc++; | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | if(pbl && parabuf[pbl - 1] == ' ') | |
1380 | parabuf[pbl - 1] = 0; | |
1381 | ||
1382 | if(nc != 0) | |
1383 | sendto_server(client_p, chptr, cap, nocap, "%s %s", modebuf, parabuf); | |
1384 | } | |
1385 | } |