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