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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 3574 2007-10-27 21:56:53Z jilles $ | |
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 | free_channel_list(&chptr->quietlist); | |
388 | ||
389 | /* Free the topic */ | |
390 | free_topic(chptr); | |
391 | ||
392 | dlinkDelete(&chptr->node, &global_channel_list); | |
393 | del_from_channel_hash(chptr->chname, chptr); | |
394 | free_channel(chptr); | |
395 | } | |
396 | ||
397 | /* channel_pub_or_secret() | |
398 | * | |
399 | * input - channel | |
400 | * output - "=" if public, "@" if secret, else "*" | |
401 | * side effects - | |
402 | */ | |
403 | static const char * | |
404 | channel_pub_or_secret(struct Channel *chptr) | |
405 | { | |
406 | if(PubChannel(chptr)) | |
407 | return ("="); | |
408 | else if(SecretChannel(chptr)) | |
409 | return ("@"); | |
410 | return ("*"); | |
411 | } | |
412 | ||
413 | /* channel_member_names() | |
414 | * | |
415 | * input - channel to list, client to list to, show endofnames | |
416 | * output - | |
417 | * side effects - client is given list of users on channel | |
418 | */ | |
419 | void | |
420 | channel_member_names(struct Channel *chptr, struct Client *client_p, int show_eon) | |
421 | { | |
422 | struct membership *msptr; | |
423 | struct Client *target_p; | |
424 | dlink_node *ptr; | |
425 | char lbuf[BUFSIZE]; | |
426 | char *t; | |
427 | int mlen; | |
428 | int tlen; | |
429 | int cur_len; | |
430 | int is_member; | |
431 | int stack = IsCapable(client_p, CLICAP_MULTI_PREFIX); | |
432 | ||
433 | if(ShowChannel(client_p, chptr)) | |
434 | { | |
435 | is_member = IsMember(client_p, chptr); | |
436 | ||
437 | cur_len = mlen = ircsprintf(lbuf, form_str(RPL_NAMREPLY), | |
438 | me.name, client_p->name, | |
439 | channel_pub_or_secret(chptr), chptr->chname); | |
440 | ||
441 | t = lbuf + cur_len; | |
442 | ||
443 | DLINK_FOREACH(ptr, chptr->members.head) | |
444 | { | |
445 | msptr = ptr->data; | |
446 | target_p = msptr->client_p; | |
447 | ||
448 | if(IsInvisible(target_p) && !is_member) | |
449 | continue; | |
450 | ||
451 | /* space, possible "@+" prefix */ | |
452 | if(cur_len + strlen(target_p->name) + 3 >= BUFSIZE - 3) | |
453 | { | |
454 | *(t - 1) = '\0'; | |
455 | sendto_one(client_p, "%s", lbuf); | |
456 | cur_len = mlen; | |
457 | t = lbuf + mlen; | |
458 | } | |
459 | ||
460 | tlen = ircsprintf(t, "%s%s ", find_channel_status(msptr, stack), | |
461 | target_p->name); | |
462 | ||
463 | cur_len += tlen; | |
464 | t += tlen; | |
465 | } | |
466 | ||
467 | /* The old behaviour here was to always output our buffer, | |
468 | * even if there are no clients we can show. This happens | |
469 | * when a client does "NAMES" with no parameters, and all | |
470 | * the clients on a -sp channel are +i. I dont see a good | |
471 | * reason for keeping that behaviour, as it just wastes | |
472 | * bandwidth. --anfl | |
473 | */ | |
474 | if(cur_len != mlen) | |
475 | { | |
476 | *(t - 1) = '\0'; | |
477 | sendto_one(client_p, "%s", lbuf); | |
478 | } | |
479 | } | |
480 | ||
481 | if(show_eon) | |
482 | sendto_one(client_p, form_str(RPL_ENDOFNAMES), | |
483 | me.name, client_p->name, chptr->chname); | |
484 | } | |
485 | ||
486 | /* del_invite() | |
487 | * | |
488 | * input - channel to remove invite from, client to remove | |
489 | * output - | |
490 | * side effects - user is removed from invite list, if exists | |
491 | */ | |
492 | void | |
493 | del_invite(struct Channel *chptr, struct Client *who) | |
494 | { | |
495 | dlinkFindDestroy(who, &chptr->invites); | |
496 | dlinkFindDestroy(chptr, &who->user->invited); | |
497 | } | |
498 | ||
499 | /* is_banned() | |
500 | * | |
501 | * input - channel to check bans for, user to check bans against | |
502 | * optional prebuilt buffers | |
503 | * output - 1 if banned, else 0 | |
504 | * side effects - | |
505 | */ | |
506 | int | |
507 | is_banned(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
508 | const char *s, const char *s2) | |
509 | { | |
510 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
511 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
512 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
513 | char *s3 = NULL; | |
514 | dlink_node *ptr; | |
515 | struct Ban *actualBan = NULL; | |
516 | struct Ban *actualExcept = NULL; | |
517 | ||
518 | if(!MyClient(who)) | |
519 | return 0; | |
520 | ||
521 | /* if the buffers havent been built, do it here */ | |
522 | if(s == NULL) | |
523 | { | |
524 | ircsprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); | |
525 | ircsprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
526 | ||
527 | s = src_host; | |
528 | s2 = src_iphost; | |
529 | } | |
530 | if(who->localClient->mangledhost != NULL) | |
531 | { | |
532 | /* if host mangling mode enabled, also check their real host */ | |
533 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
534 | { | |
535 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); | |
536 | s3 = src_althost; | |
537 | } | |
538 | /* if host mangling mode not enabled and no other spoof, | |
539 | * also check the mangled form of their host */ | |
540 | else if (!IsDynSpoof(who)) | |
541 | { | |
542 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); | |
543 | s3 = src_althost; | |
544 | } | |
545 | } | |
546 | ||
547 | DLINK_FOREACH(ptr, chptr->banlist.head) | |
548 | { | |
549 | actualBan = ptr->data; | |
550 | if(match(actualBan->banstr, s) || | |
551 | match(actualBan->banstr, s2) || | |
552 | match_cidr(actualBan->banstr, s2) || | |
553 | match_extban(actualBan->banstr, who, chptr, CHFL_BAN) || | |
554 | (s3 != NULL && match(actualBan->banstr, s3))) | |
555 | break; | |
556 | else | |
557 | actualBan = NULL; | |
558 | } | |
559 | ||
560 | if((actualBan != NULL) && ConfigChannel.use_except) | |
561 | { | |
562 | DLINK_FOREACH(ptr, chptr->exceptlist.head) | |
563 | { | |
564 | actualExcept = ptr->data; | |
565 | ||
566 | /* theyre exempted.. */ | |
567 | if(match(actualExcept->banstr, s) || | |
568 | match(actualExcept->banstr, s2) || | |
569 | match_cidr(actualExcept->banstr, s2) || | |
570 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
571 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
572 | { | |
573 | /* cache the fact theyre not banned */ | |
574 | if(msptr != NULL) | |
575 | { | |
576 | msptr->bants = chptr->bants; | |
577 | msptr->flags &= ~CHFL_BANNED; | |
578 | } | |
579 | ||
580 | return CHFL_EXCEPTION; | |
581 | } | |
582 | } | |
583 | } | |
584 | ||
585 | /* cache the banned/not banned status */ | |
586 | if(msptr != NULL) | |
587 | { | |
588 | msptr->bants = chptr->bants; | |
589 | ||
590 | if(actualBan != NULL) | |
591 | { | |
592 | msptr->flags |= CHFL_BANNED; | |
593 | return CHFL_BAN; | |
594 | } | |
595 | else | |
596 | { | |
597 | msptr->flags &= ~CHFL_BANNED; | |
598 | return 0; | |
599 | } | |
600 | } | |
601 | ||
602 | return ((actualBan ? CHFL_BAN : 0)); | |
603 | } | |
604 | ||
605 | /* is_quieted() | |
606 | * | |
607 | * input - channel to check bans for, user to check bans against | |
608 | * optional prebuilt buffers | |
609 | * output - 1 if banned, else 0 | |
610 | * side effects - | |
611 | */ | |
612 | int | |
613 | is_quieted(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
614 | const char *s, const char *s2) | |
615 | { | |
616 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
617 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
618 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
619 | char *s3 = NULL; | |
620 | dlink_node *ptr; | |
621 | struct Ban *actualBan = NULL; | |
622 | struct Ban *actualExcept = NULL; | |
623 | ||
624 | if(!MyClient(who)) | |
625 | return 0; | |
626 | ||
627 | /* if the buffers havent been built, do it here */ | |
628 | if(s == NULL) | |
629 | { | |
630 | ircsprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); | |
631 | ircsprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
632 | ||
633 | s = src_host; | |
634 | s2 = src_iphost; | |
635 | } | |
636 | if(who->localClient->mangledhost != NULL) | |
637 | { | |
638 | /* if host mangling mode enabled, also check their real host */ | |
639 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
640 | { | |
641 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); | |
642 | s3 = src_althost; | |
643 | } | |
644 | /* if host mangling mode not enabled and no other spoof, | |
645 | * also check the mangled form of their host */ | |
646 | else if (!IsDynSpoof(who)) | |
647 | { | |
648 | ircsprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); | |
649 | s3 = src_althost; | |
650 | } | |
651 | } | |
652 | ||
653 | DLINK_FOREACH(ptr, chptr->quietlist.head) | |
654 | { | |
655 | actualBan = ptr->data; | |
656 | if(match(actualBan->banstr, s) || | |
657 | match(actualBan->banstr, s2) || | |
658 | match_cidr(actualBan->banstr, s2) || | |
659 | match_extban(actualBan->banstr, who, chptr, CHFL_QUIET) || | |
660 | (s3 != NULL && match(actualBan->banstr, s3))) | |
661 | break; | |
662 | else | |
663 | actualBan = NULL; | |
664 | } | |
665 | ||
666 | if((actualBan != NULL) && ConfigChannel.use_except) | |
667 | { | |
668 | DLINK_FOREACH(ptr, chptr->exceptlist.head) | |
669 | { | |
670 | actualExcept = ptr->data; | |
671 | ||
672 | /* theyre exempted.. */ | |
673 | if(match(actualExcept->banstr, s) || | |
674 | match(actualExcept->banstr, s2) || | |
675 | match_cidr(actualExcept->banstr, s2) || | |
676 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
677 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
678 | { | |
679 | /* cache the fact theyre not banned */ | |
680 | if(msptr != NULL) | |
681 | { | |
682 | msptr->bants = chptr->bants; | |
683 | msptr->flags &= ~CHFL_BANNED; | |
684 | } | |
685 | ||
686 | return CHFL_EXCEPTION; | |
687 | } | |
688 | } | |
689 | } | |
690 | ||
691 | /* cache the banned/not banned status */ | |
692 | if(msptr != NULL) | |
693 | { | |
694 | msptr->bants = chptr->bants; | |
695 | ||
696 | if(actualBan != NULL) | |
697 | { | |
698 | msptr->flags |= CHFL_BANNED; | |
699 | return CHFL_BAN; | |
700 | } | |
701 | else | |
702 | { | |
703 | msptr->flags &= ~CHFL_BANNED; | |
704 | return 0; | |
705 | } | |
706 | } | |
707 | ||
708 | return ((actualBan ? CHFL_BAN : 0)); | |
709 | } | |
710 | ||
711 | /* can_join() | |
712 | * | |
713 | * input - client to check, channel to check for, key | |
714 | * output - reason for not being able to join, else 0 | |
715 | * side effects - | |
716 | */ | |
717 | int | |
718 | can_join(struct Client *source_p, struct Channel *chptr, char *key) | |
719 | { | |
720 | dlink_node *invite = NULL; | |
721 | dlink_node *ptr; | |
722 | struct Ban *invex = NULL; | |
723 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
724 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
725 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
726 | int use_althost = 0; | |
727 | int i = 0; | |
728 | hook_data_channel moduledata; | |
729 | ||
730 | s_assert(source_p->localClient != NULL); | |
731 | ||
732 | ircsprintf(src_host, "%s!%s@%s", source_p->name, source_p->username, source_p->host); | |
733 | ircsprintf(src_iphost, "%s!%s@%s", source_p->name, source_p->username, source_p->sockhost); | |
734 | if(source_p->localClient->mangledhost != NULL) | |
735 | { | |
736 | /* if host mangling mode enabled, also check their real host */ | |
737 | if(!strcmp(source_p->host, source_p->localClient->mangledhost)) | |
738 | { | |
739 | ircsprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->orighost); | |
740 | use_althost = 1; | |
741 | } | |
742 | /* if host mangling mode not enabled and no other spoof, | |
743 | * also check the mangled form of their host */ | |
744 | else if (!IsDynSpoof(source_p)) | |
745 | { | |
746 | ircsprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->localClient->mangledhost); | |
747 | use_althost = 1; | |
748 | } | |
749 | } | |
750 | ||
751 | if((is_banned(chptr, source_p, NULL, src_host, src_iphost)) == CHFL_BAN) | |
752 | return (ERR_BANNEDFROMCHAN); | |
753 | ||
754 | if(chptr->mode.mode & MODE_INVITEONLY) | |
755 | { | |
756 | DLINK_FOREACH(invite, source_p->user->invited.head) | |
757 | { | |
758 | if(invite->data == chptr) | |
759 | break; | |
760 | } | |
761 | if(invite == NULL) | |
762 | { | |
763 | if(!ConfigChannel.use_invex) | |
764 | return (ERR_INVITEONLYCHAN); | |
765 | DLINK_FOREACH(ptr, chptr->invexlist.head) | |
766 | { | |
767 | invex = ptr->data; | |
768 | if(match(invex->banstr, src_host) | |
769 | || match(invex->banstr, src_iphost) | |
770 | || match_cidr(invex->banstr, src_iphost) | |
771 | || match_extban(invex->banstr, source_p, chptr, CHFL_INVEX) | |
772 | || (use_althost && match(invex->banstr, src_althost))) | |
773 | break; | |
774 | } | |
775 | if(ptr == NULL) | |
776 | return (ERR_INVITEONLYCHAN); | |
777 | } | |
778 | } | |
779 | ||
780 | if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key))) | |
781 | return (ERR_BADCHANNELKEY); | |
782 | ||
783 | if(chptr->mode.limit && | |
784 | dlink_list_length(&chptr->members) >= (unsigned long) chptr->mode.limit) | |
785 | i = ERR_CHANNELISFULL; | |
786 | if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser)) | |
787 | i = ERR_NEEDREGGEDNICK; | |
788 | /* join throttling stuff --nenolod */ | |
789 | else if(chptr->mode.join_num > 0 && chptr->mode.join_time > 0) | |
790 | { | |
791 | if ((CurrentTime - chptr->join_delta <= | |
792 | chptr->mode.join_time) && (chptr->join_count >= | |
793 | chptr->mode.join_num)) | |
794 | i = ERR_THROTTLE; | |
795 | } | |
796 | ||
797 | /* allow /invite to override +l/+r/+j also -- jilles */ | |
798 | if (i != 0 && invite == NULL) | |
799 | { | |
800 | DLINK_FOREACH(invite, source_p->user->invited.head) | |
801 | { | |
802 | if(invite->data == chptr) | |
803 | break; | |
804 | } | |
805 | if (invite == NULL) | |
806 | return i; | |
807 | } | |
808 | ||
809 | moduledata.client = source_p; | |
810 | moduledata.chptr = chptr; | |
811 | moduledata.approved = 0; | |
812 | ||
813 | call_hook(h_can_join, &moduledata); | |
814 | ||
815 | return moduledata.approved; | |
816 | } | |
817 | ||
818 | /* can_send() | |
819 | * | |
820 | * input - user to check in channel, membership pointer | |
821 | * output - whether can explicitly send or not, else CAN_SEND_NONOP | |
822 | * side effects - | |
823 | */ | |
824 | int | |
825 | can_send(struct Channel *chptr, struct Client *source_p, struct membership *msptr) | |
826 | { | |
827 | if(IsServer(source_p) || IsService(source_p)) | |
828 | return CAN_SEND_OPV; | |
829 | ||
830 | if(MyClient(source_p) && hash_find_resv(chptr->chname) && | |
831 | !IsOper(source_p) && !IsExemptResv(source_p)) | |
832 | return CAN_SEND_NO; | |
833 | ||
834 | if(msptr == NULL) | |
835 | { | |
836 | msptr = find_channel_membership(chptr, source_p); | |
837 | ||
838 | if(msptr == NULL) | |
839 | { | |
840 | /* if its +m or +n and theyre not in the channel, | |
841 | * they cant send. we dont check bans here because | |
842 | * theres no possibility of caching them --fl | |
843 | */ | |
844 | if(chptr->mode.mode & MODE_NOPRIVMSGS || chptr->mode.mode & MODE_MODERATED) | |
845 | return CAN_SEND_NO; | |
846 | else | |
847 | return CAN_SEND_NONOP; | |
848 | } | |
849 | } | |
850 | ||
851 | if(is_chanop_voiced(msptr)) | |
852 | return CAN_SEND_OPV; | |
853 | ||
854 | if(chptr->mode.mode & MODE_MODERATED) | |
855 | return CAN_SEND_NO; | |
856 | ||
857 | if(MyClient(source_p)) | |
858 | { | |
859 | /* cached can_send */ | |
860 | if(msptr->bants == chptr->bants) | |
861 | { | |
862 | if(can_send_banned(msptr)) | |
863 | return CAN_SEND_NO; | |
864 | } | |
865 | else if(is_banned(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN | |
866 | || is_quieted(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN) | |
867 | return CAN_SEND_NO; | |
868 | } | |
869 | ||
870 | return CAN_SEND_NONOP; | |
871 | } | |
872 | ||
873 | /* find_bannickchange_channel() | |
874 | * Input: client to check | |
875 | * Output: channel preventing nick change | |
876 | */ | |
877 | struct Channel * | |
878 | find_bannickchange_channel(struct Client *client_p) | |
879 | { | |
880 | struct Channel *chptr; | |
881 | struct membership *msptr; | |
882 | dlink_node *ptr; | |
883 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
884 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
885 | ||
886 | if (!MyClient(client_p)) | |
887 | return NULL; | |
888 | ||
889 | ircsprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host); | |
890 | ircsprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost); | |
891 | ||
892 | DLINK_FOREACH(ptr, client_p->user->channel.head) | |
893 | { | |
894 | msptr = ptr->data; | |
895 | chptr = msptr->chptr; | |
896 | if (is_chanop_voiced(msptr)) | |
897 | continue; | |
898 | /* cached can_send */ | |
899 | if (msptr->bants == chptr->bants) | |
900 | { | |
901 | if (can_send_banned(msptr)) | |
902 | return chptr; | |
903 | } | |
904 | else if (is_banned(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN | |
905 | || is_quieted(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN) | |
906 | return chptr; | |
907 | } | |
908 | return NULL; | |
909 | } | |
910 | ||
911 | /* void check_spambot_warning(struct Client *source_p) | |
912 | * Input: Client to check, channel name or NULL if this is a part. | |
913 | * Output: none | |
914 | * Side-effects: Updates the client's oper_warn_count_down, warns the | |
915 | * IRC operators if necessary, and updates join_leave_countdown as | |
916 | * needed. | |
917 | */ | |
918 | void | |
919 | check_spambot_warning(struct Client *source_p, const char *name) | |
920 | { | |
921 | int t_delta; | |
922 | int decrement_count; | |
923 | if((GlobalSetOptions.spam_num && | |
924 | (source_p->localClient->join_leave_count >= GlobalSetOptions.spam_num))) | |
925 | { | |
926 | if(source_p->localClient->oper_warn_count_down > 0) | |
927 | source_p->localClient->oper_warn_count_down--; | |
928 | else | |
929 | source_p->localClient->oper_warn_count_down = 0; | |
930 | if(source_p->localClient->oper_warn_count_down == 0) | |
931 | { | |
932 | /* Its already known as a possible spambot */ | |
933 | if(name != NULL) | |
934 | sendto_realops_snomask(SNO_BOTS, L_ALL, | |
935 | "User %s (%s@%s) trying to join %s is a possible spambot", | |
936 | source_p->name, | |
937 | source_p->username, source_p->orighost, name); | |
938 | else | |
939 | sendto_realops_snomask(SNO_BOTS, L_ALL, | |
940 | "User %s (%s@%s) is a possible spambot", | |
941 | source_p->name, | |
942 | source_p->username, source_p->orighost); | |
943 | source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; | |
944 | } | |
945 | } | |
946 | else | |
947 | { | |
948 | if((t_delta = | |
949 | (CurrentTime - source_p->localClient->last_leave_time)) > | |
950 | JOIN_LEAVE_COUNT_EXPIRE_TIME) | |
951 | { | |
952 | decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); | |
953 | if(decrement_count > source_p->localClient->join_leave_count) | |
954 | source_p->localClient->join_leave_count = 0; | |
955 | else | |
956 | source_p->localClient->join_leave_count -= decrement_count; | |
957 | } | |
958 | else | |
959 | { | |
960 | if((CurrentTime - | |
961 | (source_p->localClient->last_join_time)) < GlobalSetOptions.spam_time) | |
962 | { | |
963 | /* oh, its a possible spambot */ | |
964 | source_p->localClient->join_leave_count++; | |
965 | } | |
966 | } | |
967 | if(name != NULL) | |
968 | source_p->localClient->last_join_time = CurrentTime; | |
969 | else | |
970 | source_p->localClient->last_leave_time = CurrentTime; | |
971 | } | |
972 | } | |
973 | ||
974 | /* check_splitmode() | |
975 | * | |
976 | * input - | |
977 | * output - | |
978 | * side effects - compares usercount and servercount against their split | |
979 | * values and adjusts splitmode accordingly | |
980 | */ | |
981 | void | |
982 | check_splitmode(void *unused) | |
983 | { | |
984 | if(splitchecking && (ConfigChannel.no_join_on_split || ConfigChannel.no_create_on_split)) | |
985 | { | |
986 | /* not split, we're being asked to check now because someone | |
987 | * has left | |
988 | */ | |
989 | if(!splitmode) | |
990 | { | |
991 | if(eob_count < split_servers || Count.total < split_users) | |
992 | { | |
993 | splitmode = 1; | |
994 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
995 | "Network split, activating splitmode"); | |
996 | eventAddIsh("check_splitmode", check_splitmode, NULL, 2); | |
997 | } | |
998 | } | |
999 | /* in splitmode, check whether its finished */ | |
1000 | else if(eob_count >= split_servers && Count.total >= split_users) | |
1001 | { | |
1002 | splitmode = 0; | |
1003 | ||
1004 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
1005 | "Network rejoined, deactivating splitmode"); | |
1006 | ||
1007 | eventDelete(check_splitmode, NULL); | |
1008 | } | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | ||
1013 | /* allocate_topic() | |
1014 | * | |
1015 | * input - channel to allocate topic for | |
1016 | * output - 1 on success, else 0 | |
1017 | * side effects - channel gets a topic allocated | |
1018 | */ | |
1019 | static void | |
1020 | allocate_topic(struct Channel *chptr) | |
1021 | { | |
1022 | void *ptr; | |
1023 | ||
1024 | if(chptr == NULL) | |
1025 | return; | |
1026 | ||
1027 | ptr = BlockHeapAlloc(topic_heap); | |
1028 | ||
1029 | /* Basically we allocate one large block for the topic and | |
1030 | * the topic info. We then split it up into two and shove it | |
1031 | * in the chptr | |
1032 | */ | |
1033 | chptr->topic = ptr; | |
1034 | chptr->topic_info = (char *) ptr + TOPICLEN + 1; | |
1035 | *chptr->topic = '\0'; | |
1036 | *chptr->topic_info = '\0'; | |
1037 | } | |
1038 | ||
1039 | /* free_topic() | |
1040 | * | |
1041 | * input - channel which has topic to free | |
1042 | * output - | |
1043 | * side effects - channels topic is free'd | |
1044 | */ | |
1045 | static void | |
1046 | free_topic(struct Channel *chptr) | |
1047 | { | |
1048 | void *ptr; | |
1049 | ||
1050 | if(chptr == NULL || chptr->topic == NULL) | |
1051 | return; | |
1052 | ||
1053 | /* This is safe for now - If you change allocate_topic you | |
1054 | * MUST change this as well | |
1055 | */ | |
1056 | ptr = chptr->topic; | |
1057 | BlockHeapFree(topic_heap, ptr); | |
1058 | chptr->topic = NULL; | |
1059 | chptr->topic_info = NULL; | |
1060 | } | |
1061 | ||
1062 | /* set_channel_topic() | |
1063 | * | |
1064 | * input - channel, topic to set, topic info and topic ts | |
1065 | * output - | |
1066 | * side effects - channels topic, topic info and TS are set. | |
1067 | */ | |
1068 | void | |
1069 | set_channel_topic(struct Channel *chptr, const char *topic, const char *topic_info, time_t topicts) | |
1070 | { | |
1071 | if(strlen(topic) > 0) | |
1072 | { | |
1073 | if(chptr->topic == NULL) | |
1074 | allocate_topic(chptr); | |
1075 | strlcpy(chptr->topic, topic, TOPICLEN + 1); | |
1076 | strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN); | |
1077 | chptr->topic_time = topicts; | |
1078 | } | |
1079 | else | |
1080 | { | |
1081 | if(chptr->topic != NULL) | |
1082 | free_topic(chptr); | |
1083 | chptr->topic_time = 0; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | static const struct mode_letter | |
1088 | { | |
1089 | const unsigned int mode; | |
1090 | const unsigned char letter; | |
1091 | } flags[] = | |
1092 | { | |
1093 | {MODE_INVITEONLY, 'i'}, | |
1094 | {MODE_MODERATED, 'm'}, | |
1095 | {MODE_NOPRIVMSGS, 'n'}, | |
1096 | {MODE_PRIVATE, 'p'}, | |
1097 | {MODE_SECRET, 's'}, | |
1098 | {MODE_TOPICLIMIT, 't'}, | |
1099 | {MODE_NOCOLOR, 'c'}, | |
1100 | {MODE_FREEINVITE, 'g'}, | |
1101 | {MODE_OPMODERATE, 'z'}, | |
1102 | {MODE_EXLIMIT, 'L'}, | |
1103 | {MODE_PERMANENT, 'P'}, | |
1104 | {MODE_FREETARGET, 'F'}, | |
1105 | {MODE_DISFORWARD, 'Q'}, | |
1106 | {MODE_REGONLY, 'r'}, | |
1107 | {0, '\0'} | |
1108 | }; | |
1109 | ||
1110 | /* channel_modes() | |
1111 | * | |
1112 | * inputs - pointer to channel | |
1113 | * - pointer to client | |
1114 | * output - string with simple modes | |
1115 | * side effects - result from previous calls overwritten | |
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(!IsClient(client_p) || IsMember(client_p, chptr)) | |
1141 | pbuf += ircsprintf(pbuf, " %d", chptr->mode.limit); | |
1142 | } | |
1143 | ||
1144 | if(*chptr->mode.key) | |
1145 | { | |
1146 | *mbuf++ = 'k'; | |
1147 | ||
1148 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) | |
1149 | pbuf += ircsprintf(pbuf, " %s", chptr->mode.key); | |
1150 | } | |
1151 | ||
1152 | if(chptr->mode.join_num) | |
1153 | { | |
1154 | *mbuf++ = 'j'; | |
1155 | ||
1156 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) | |
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 || !IsClient(client_p))) | |
1162 | { | |
1163 | *mbuf++ = 'f'; | |
1164 | ||
1165 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) | |
1166 | pbuf += ircsprintf(pbuf, " %s", chptr->mode.forward); | |
1167 | } | |
1168 | ||
1169 | *mbuf = '\0'; | |
1170 | ||
1171 | strlcpy(final, buf1, sizeof final); | |
1172 | strlcat(final, buf2, sizeof final); | |
1173 | return final; | |
1174 | } | |
1175 | ||
1176 | /* Now lets do some stuff to keep track of what combinations of | |
1177 | * servers exist... | |
1178 | * Note that the number of combinations doubles each time you add | |
1179 | * something to this list. Each one is only quick if no servers use that | |
1180 | * combination, but if the numbers get too high here MODE will get too | |
1181 | * slow. I suggest if you get more than 7 here, you consider getting rid | |
1182 | * of some and merging or something. If it wasn't for irc+cs we would | |
1183 | * probably not even need to bother about most of these, but unfortunately | |
1184 | * we do. -A1kmm | |
1185 | */ | |
1186 | ||
1187 | /* void init_chcap_usage_counts(void) | |
1188 | * | |
1189 | * Inputs - none | |
1190 | * Output - none | |
1191 | * Side-effects - Initialises the usage counts to zero. Fills in the | |
1192 | * chcap_yes and chcap_no combination tables. | |
1193 | */ | |
1194 | void | |
1195 | init_chcap_usage_counts(void) | |
1196 | { | |
1197 | unsigned long m, c, y, n; | |
1198 | ||
1199 | memset(chcap_combos, 0, sizeof(chcap_combos)); | |
1200 | ||
1201 | /* For every possible combination */ | |
1202 | for (m = 0; m < NCHCAP_COMBOS; m++) | |
1203 | { | |
1204 | /* Check each capab */ | |
1205 | for (c = y = n = 0; c < NCHCAPS; c++) | |
1206 | { | |
1207 | if((m & (1 << c)) == 0) | |
1208 | n |= channel_capabs[c]; | |
1209 | else | |
1210 | y |= channel_capabs[c]; | |
1211 | } | |
1212 | chcap_combos[m].cap_yes = y; | |
1213 | chcap_combos[m].cap_no = n; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1218 | * Input: serv_p; The client whose capabs to register. | |
1219 | * Output: none | |
1220 | * Side-effects: Increments the usage counts for the correct capab | |
1221 | * combination. | |
1222 | */ | |
1223 | void | |
1224 | set_chcap_usage_counts(struct Client *serv_p) | |
1225 | { | |
1226 | int n; | |
1227 | ||
1228 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1229 | { | |
1230 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1231 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1232 | { | |
1233 | chcap_combos[n].count++; | |
1234 | return; | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | /* This should be impossible -A1kmm. */ | |
1239 | s_assert(0); | |
1240 | } | |
1241 | ||
1242 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1243 | * | |
1244 | * Inputs - serv_p; The client whose capabs to register. | |
1245 | * Output - none | |
1246 | * Side-effects - Decrements the usage counts for the correct capab | |
1247 | * combination. | |
1248 | */ | |
1249 | void | |
1250 | unset_chcap_usage_counts(struct Client *serv_p) | |
1251 | { | |
1252 | int n; | |
1253 | ||
1254 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1255 | { | |
1256 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1257 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1258 | { | |
1259 | /* Hopefully capabs can't change dynamically or anything... */ | |
1260 | s_assert(chcap_combos[n].count > 0); | |
1261 | ||
1262 | if(chcap_combos[n].count > 0) | |
1263 | chcap_combos[n].count--; | |
1264 | return; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | /* This should be impossible -A1kmm. */ | |
1269 | s_assert(0); | |
1270 | } | |
1271 | ||
1272 | /* void send_cap_mode_changes(struct Client *client_p, | |
1273 | * struct Client *source_p, | |
1274 | * struct Channel *chptr, int cap, int nocap) | |
1275 | * Input: The client sending(client_p), the source client(source_p), | |
1276 | * the channel to send mode changes for(chptr) | |
1277 | * Output: None. | |
1278 | * Side-effects: Sends the appropriate mode changes to capable servers. | |
1279 | * | |
1280 | * Reverted back to my original design, except that we now keep a count | |
1281 | * of the number of servers which each combination as an optimisation, so | |
1282 | * the capabs combinations which are not needed are not worked out. -A1kmm | |
1283 | */ | |
1284 | void | |
1285 | send_cap_mode_changes(struct Client *client_p, struct Client *source_p, | |
1286 | struct Channel *chptr, struct ChModeChange mode_changes[], int mode_count) | |
1287 | { | |
1288 | static char modebuf[BUFSIZE]; | |
1289 | static char parabuf[BUFSIZE]; | |
1290 | int i, mbl, pbl, nc, mc, preflen, len; | |
1291 | char *pbuf; | |
1292 | const char *arg; | |
1293 | int dir; | |
1294 | int j; | |
1295 | int cap; | |
1296 | int nocap; | |
1297 | int arglen; | |
1298 | ||
1299 | /* Now send to servers... */ | |
1300 | for (j = 0; j < NCHCAP_COMBOS; j++) | |
1301 | { | |
1302 | if(chcap_combos[j].count == 0) | |
1303 | continue; | |
1304 | ||
1305 | mc = 0; | |
1306 | nc = 0; | |
1307 | pbl = 0; | |
1308 | parabuf[0] = 0; | |
1309 | pbuf = parabuf; | |
1310 | dir = MODE_QUERY; | |
1311 | ||
1312 | cap = chcap_combos[j].cap_yes; | |
1313 | nocap = chcap_combos[j].cap_no; | |
1314 | ||
1315 | if(cap & CAP_TS6) | |
1316 | mbl = preflen = ircsprintf(modebuf, ":%s TMODE %ld %s ", | |
1317 | use_id(source_p), (long) chptr->channelts, | |
1318 | chptr->chname); | |
1319 | else | |
1320 | mbl = preflen = ircsprintf(modebuf, ":%s MODE %s ", | |
1321 | source_p->name, chptr->chname); | |
1322 | ||
1323 | /* loop the list of - modes we have */ | |
1324 | for (i = 0; i < mode_count; i++) | |
1325 | { | |
1326 | /* if they dont support the cap we need, or they do support a cap they | |
1327 | * cant have, then dont add it to the modebuf.. that way they wont see | |
1328 | * the mode | |
1329 | */ | |
1330 | if((mode_changes[i].letter == 0) || | |
1331 | ((cap & mode_changes[i].caps) != mode_changes[i].caps) | |
1332 | || ((nocap & mode_changes[i].nocaps) != mode_changes[i].nocaps)) | |
1333 | continue; | |
1334 | ||
1335 | if((cap & CAP_TS6) && !EmptyString(mode_changes[i].id)) | |
1336 | arg = mode_changes[i].id; | |
1337 | else | |
1338 | arg = mode_changes[i].arg; | |
1339 | ||
1340 | if(arg) | |
1341 | { | |
1342 | arglen = strlen(arg); | |
1343 | ||
1344 | /* dont even think about it! --fl */ | |
1345 | if(arglen > MODEBUFLEN - 5) | |
1346 | continue; | |
1347 | } | |
1348 | ||
1349 | /* if we're creeping past the buf size, we need to send it and make | |
1350 | * another line for the other modes | |
1351 | * XXX - this could give away server topology with uids being | |
1352 | * different lengths, but not much we can do, except possibly break | |
1353 | * them as if they were the longest of the nick or uid at all times, | |
1354 | * which even then won't work as we don't always know the uid -A1kmm. | |
1355 | */ | |
1356 | if(arg && ((mc == MAXMODEPARAMSSERV) || | |
1357 | ((mbl + pbl + arglen + 4) > (BUFSIZE - 3)))) | |
1358 | { | |
1359 | if(nc != 0) | |
1360 | sendto_server(client_p, chptr, cap, nocap, | |
1361 | "%s %s", modebuf, parabuf); | |
1362 | nc = 0; | |
1363 | mc = 0; | |
1364 | ||
1365 | mbl = preflen; | |
1366 | pbl = 0; | |
1367 | pbuf = parabuf; | |
1368 | parabuf[0] = 0; | |
1369 | dir = MODE_QUERY; | |
1370 | } | |
1371 | ||
1372 | if(dir != mode_changes[i].dir) | |
1373 | { | |
1374 | modebuf[mbl++] = (mode_changes[i].dir == MODE_ADD) ? '+' : '-'; | |
1375 | dir = mode_changes[i].dir; | |
1376 | } | |
1377 | ||
1378 | modebuf[mbl++] = mode_changes[i].letter; | |
1379 | modebuf[mbl] = 0; | |
1380 | nc++; | |
1381 | ||
1382 | if(arg != NULL) | |
1383 | { | |
1384 | len = ircsprintf(pbuf, "%s ", arg); | |
1385 | pbuf += len; | |
1386 | pbl += len; | |
1387 | mc++; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | if(pbl && parabuf[pbl - 1] == ' ') | |
1392 | parabuf[pbl - 1] = 0; | |
1393 | ||
1394 | if(nc != 0) | |
1395 | sendto_server(client_p, chptr, cap, nocap, "%s %s", modebuf, parabuf); | |
1396 | } | |
1397 | } |