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Commit | Line | Data |
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212380e3 AC |
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 | * | |
83294285 | 24 | * $Id: channel.c 3580 2007-11-07 23:45:14Z jilles $ |
212380e3 AC |
25 | */ |
26 | ||
27 | #include "stdinc.h" | |
212380e3 | 28 | #include "channel.h" |
392ae75c | 29 | #include "chmode.h" |
212380e3 AC |
30 | #include "client.h" |
31 | #include "common.h" | |
32 | #include "hash.h" | |
33 | #include "hook.h" | |
4562c604 | 34 | #include "match.h" |
212380e3 AC |
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" | |
4016731b | 43 | #include "logger.h" |
212380e3 | 44 | |
18e4d421 | 45 | struct config_channel_entry ConfigChannel; |
c3d10343 | 46 | rb_dlink_list global_channel_list; |
b617afdc VY |
47 | static rb_bh *channel_heap; |
48 | static rb_bh *ban_heap; | |
49 | static rb_bh *topic_heap; | |
50 | static rb_bh *member_heap; | |
51 | ||
212380e3 AC |
52 | static int channel_capabs[] = { CAP_EX, CAP_IE, |
53 | CAP_SERVICE, | |
54 | CAP_TS6 | |
55 | }; | |
56 | ||
57 | #define NCHCAPS (sizeof(channel_capabs)/sizeof(int)) | |
58 | #define NCHCAP_COMBOS (1 << NCHCAPS) | |
59 | ||
60 | static struct ChCapCombo chcap_combos[NCHCAP_COMBOS]; | |
61 | ||
62 | static void free_topic(struct Channel *chptr); | |
63 | ||
64 | static int h_can_join; | |
0aa36c5f | 65 | static int h_can_send; |
749d8c11 | 66 | int h_get_channel_access; |
212380e3 AC |
67 | |
68 | /* init_channels() | |
69 | * | |
70 | * input - | |
71 | * output - | |
72 | * side effects - initialises the various blockheaps | |
73 | */ | |
74 | void | |
75 | init_channels(void) | |
76 | { | |
c608a061 AC |
77 | channel_heap = rb_bh_create(sizeof(struct Channel), CHANNEL_HEAP_SIZE, "channel_heap"); |
78 | ban_heap = rb_bh_create(sizeof(struct Ban), BAN_HEAP_SIZE, "ban_heap"); | |
79 | topic_heap = rb_bh_create(TOPICLEN + 1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE, "topic_heap"); | |
80 | member_heap = rb_bh_create(sizeof(struct membership), MEMBER_HEAP_SIZE, "member_heap"); | |
212380e3 AC |
81 | |
82 | h_can_join = register_hook("can_join"); | |
0aa36c5f | 83 | h_can_send = register_hook("can_send"); |
749d8c11 | 84 | h_get_channel_access = register_hook("get_channel_access"); |
212380e3 AC |
85 | } |
86 | ||
87 | /* | |
88 | * allocate_channel - Allocates a channel | |
89 | */ | |
90 | struct Channel * | |
91 | allocate_channel(const char *chname) | |
92 | { | |
93 | struct Channel *chptr; | |
398b6a73 | 94 | chptr = rb_bh_alloc(channel_heap); |
47a03750 | 95 | chptr->chname = rb_strdup(chname); |
212380e3 AC |
96 | return (chptr); |
97 | } | |
98 | ||
99 | void | |
100 | free_channel(struct Channel *chptr) | |
101 | { | |
637c4932 | 102 | rb_free(chptr->chname); |
78e6b731 | 103 | rb_free(chptr->mode_lock); |
398b6a73 | 104 | rb_bh_free(channel_heap, chptr); |
212380e3 AC |
105 | } |
106 | ||
107 | struct Ban * | |
765d839d | 108 | allocate_ban(const char *banstr, const char *who, const char *forward) |
212380e3 AC |
109 | { |
110 | struct Ban *bptr; | |
398b6a73 | 111 | bptr = rb_bh_alloc(ban_heap); |
47a03750 VY |
112 | bptr->banstr = rb_strdup(banstr); |
113 | bptr->who = rb_strdup(who); | |
765d839d | 114 | bptr->forward = forward ? rb_strdup(forward) : NULL; |
212380e3 AC |
115 | |
116 | return (bptr); | |
117 | } | |
118 | ||
119 | void | |
120 | free_ban(struct Ban *bptr) | |
121 | { | |
637c4932 VY |
122 | rb_free(bptr->banstr); |
123 | rb_free(bptr->who); | |
765d839d | 124 | rb_free(bptr->forward); |
398b6a73 | 125 | rb_bh_free(ban_heap, bptr); |
212380e3 AC |
126 | } |
127 | ||
27912fd4 AC |
128 | /* |
129 | * send_channel_join() | |
130 | * | |
131 | * input - channel to join, client joining. | |
132 | * output - none | |
133 | * side effects - none | |
134 | */ | |
135 | void | |
136 | send_channel_join(struct Channel *chptr, struct Client *client_p) | |
137 | { | |
138 | if (!IsClient(client_p)) | |
139 | return; | |
140 | ||
92052a5c AC |
141 | sendto_channel_local_with_capability(ALL_MEMBERS, NOCAPS, CLICAP_EXTENDED_JOIN, chptr, ":%s!%s@%s JOIN %s", |
142 | client_p->name, client_p->username, client_p->host, chptr->chname); | |
143 | ||
26e9dd93 | 144 | sendto_channel_local_with_capability(ALL_MEMBERS, CLICAP_EXTENDED_JOIN, NOCAPS, chptr, ":%s!%s@%s JOIN %s %s :%s", |
92052a5c AC |
145 | client_p->name, client_p->username, client_p->host, chptr->chname, |
146 | EmptyString(client_p->user->suser) ? "*" : client_p->user->suser, | |
26e9dd93 | 147 | client_p->info); |
27912fd4 | 148 | } |
212380e3 AC |
149 | |
150 | /* find_channel_membership() | |
151 | * | |
152 | * input - channel to find them in, client to find | |
153 | * output - membership of client in channel, else NULL | |
154 | * side effects - | |
155 | */ | |
156 | struct membership * | |
157 | find_channel_membership(struct Channel *chptr, struct Client *client_p) | |
158 | { | |
159 | struct membership *msptr; | |
330fc5c1 | 160 | rb_dlink_node *ptr; |
212380e3 AC |
161 | |
162 | if(!IsClient(client_p)) | |
163 | return NULL; | |
164 | ||
165 | /* Pick the most efficient list to use to be nice to things like | |
166 | * CHANSERV which could be in a large number of channels | |
167 | */ | |
330fc5c1 | 168 | if(rb_dlink_list_length(&chptr->members) < rb_dlink_list_length(&client_p->user->channel)) |
212380e3 | 169 | { |
5cefa1d6 | 170 | RB_DLINK_FOREACH(ptr, chptr->members.head) |
212380e3 AC |
171 | { |
172 | msptr = ptr->data; | |
173 | ||
174 | if(msptr->client_p == client_p) | |
175 | return msptr; | |
176 | } | |
177 | } | |
178 | else | |
179 | { | |
5cefa1d6 | 180 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) |
212380e3 AC |
181 | { |
182 | msptr = ptr->data; | |
183 | ||
184 | if(msptr->chptr == chptr) | |
185 | return msptr; | |
186 | } | |
187 | } | |
188 | ||
189 | return NULL; | |
190 | } | |
191 | ||
192 | /* find_channel_status() | |
193 | * | |
194 | * input - membership to get status for, whether we can combine flags | |
195 | * output - flags of user on channel | |
196 | * side effects - | |
197 | */ | |
198 | const char * | |
199 | find_channel_status(struct membership *msptr, int combine) | |
200 | { | |
201 | static char buffer[3]; | |
202 | char *p; | |
203 | ||
204 | p = buffer; | |
205 | ||
206 | if(is_chanop(msptr)) | |
207 | { | |
208 | if(!combine) | |
209 | return "@"; | |
210 | *p++ = '@'; | |
211 | } | |
212 | ||
213 | if(is_voiced(msptr)) | |
214 | *p++ = '+'; | |
215 | ||
216 | *p = '\0'; | |
217 | return buffer; | |
218 | } | |
219 | ||
220 | /* add_user_to_channel() | |
221 | * | |
222 | * input - channel to add client to, client to add, channel flags | |
223 | * output - | |
224 | * side effects - user is added to channel | |
225 | */ | |
226 | void | |
227 | add_user_to_channel(struct Channel *chptr, struct Client *client_p, int flags) | |
228 | { | |
229 | struct membership *msptr; | |
230 | ||
231 | s_assert(client_p->user != NULL); | |
232 | if(client_p->user == NULL) | |
233 | return; | |
234 | ||
398b6a73 | 235 | msptr = rb_bh_alloc(member_heap); |
212380e3 AC |
236 | |
237 | msptr->chptr = chptr; | |
238 | msptr->client_p = client_p; | |
239 | msptr->flags = flags; | |
240 | ||
330fc5c1 AC |
241 | rb_dlinkAdd(msptr, &msptr->usernode, &client_p->user->channel); |
242 | rb_dlinkAdd(msptr, &msptr->channode, &chptr->members); | |
212380e3 AC |
243 | |
244 | if(MyClient(client_p)) | |
330fc5c1 | 245 | rb_dlinkAdd(msptr, &msptr->locchannode, &chptr->locmembers); |
212380e3 AC |
246 | } |
247 | ||
248 | /* remove_user_from_channel() | |
249 | * | |
250 | * input - membership pointer to remove from channel | |
251 | * output - | |
252 | * side effects - membership (thus user) is removed from channel | |
253 | */ | |
254 | void | |
255 | remove_user_from_channel(struct membership *msptr) | |
256 | { | |
257 | struct Client *client_p; | |
258 | struct Channel *chptr; | |
259 | s_assert(msptr != NULL); | |
260 | if(msptr == NULL) | |
261 | return; | |
262 | ||
263 | client_p = msptr->client_p; | |
264 | chptr = msptr->chptr; | |
265 | ||
330fc5c1 AC |
266 | rb_dlinkDelete(&msptr->usernode, &client_p->user->channel); |
267 | rb_dlinkDelete(&msptr->channode, &chptr->members); | |
212380e3 AC |
268 | |
269 | if(client_p->servptr == &me) | |
330fc5c1 | 270 | rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers); |
212380e3 | 271 | |
330fc5c1 | 272 | if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0) |
212380e3 AC |
273 | destroy_channel(chptr); |
274 | ||
398b6a73 | 275 | rb_bh_free(member_heap, msptr); |
212380e3 AC |
276 | |
277 | return; | |
278 | } | |
279 | ||
280 | /* remove_user_from_channels() | |
281 | * | |
282 | * input - user to remove from all channels | |
283 | * output - | |
284 | * side effects - user is removed from all channels | |
285 | */ | |
286 | void | |
287 | remove_user_from_channels(struct Client *client_p) | |
288 | { | |
289 | struct Channel *chptr; | |
290 | struct membership *msptr; | |
330fc5c1 | 291 | rb_dlink_node *ptr; |
637c4932 | 292 | rb_dlink_node *next_ptr; |
212380e3 AC |
293 | |
294 | if(client_p == NULL) | |
295 | return; | |
296 | ||
637c4932 | 297 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->user->channel.head) |
212380e3 AC |
298 | { |
299 | msptr = ptr->data; | |
300 | chptr = msptr->chptr; | |
301 | ||
330fc5c1 | 302 | rb_dlinkDelete(&msptr->channode, &chptr->members); |
212380e3 AC |
303 | |
304 | if(client_p->servptr == &me) | |
330fc5c1 | 305 | rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers); |
212380e3 | 306 | |
330fc5c1 | 307 | if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0) |
212380e3 AC |
308 | destroy_channel(chptr); |
309 | ||
398b6a73 | 310 | rb_bh_free(member_heap, msptr); |
212380e3 AC |
311 | } |
312 | ||
313 | client_p->user->channel.head = client_p->user->channel.tail = NULL; | |
314 | client_p->user->channel.length = 0; | |
315 | } | |
316 | ||
317 | /* invalidate_bancache_user() | |
318 | * | |
319 | * input - user to invalidate ban cache for | |
320 | * output - | |
321 | * side effects - ban cache is invalidated for all memberships of that user | |
322 | * to be used after a nick change | |
323 | */ | |
324 | void | |
325 | invalidate_bancache_user(struct Client *client_p) | |
326 | { | |
327 | struct membership *msptr; | |
330fc5c1 | 328 | rb_dlink_node *ptr; |
212380e3 AC |
329 | |
330 | if(client_p == NULL) | |
331 | return; | |
332 | ||
5cefa1d6 | 333 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) |
212380e3 AC |
334 | { |
335 | msptr = ptr->data; | |
336 | msptr->bants = 0; | |
337 | msptr->flags &= ~CHFL_BANNED; | |
338 | } | |
339 | } | |
340 | ||
341 | /* check_channel_name() | |
342 | * | |
343 | * input - channel name | |
344 | * output - 1 if valid channel name, else 0 | |
345 | * side effects - | |
346 | */ | |
347 | int | |
348 | check_channel_name(const char *name) | |
349 | { | |
350 | s_assert(name != NULL); | |
351 | if(name == NULL) | |
352 | return 0; | |
353 | ||
354 | for (; *name; ++name) | |
355 | { | |
356 | if(!IsChanChar(*name)) | |
357 | return 0; | |
358 | } | |
359 | ||
360 | return 1; | |
361 | } | |
362 | ||
363 | /* free_channel_list() | |
364 | * | |
330fc5c1 | 365 | * input - rb_dlink list to free |
212380e3 AC |
366 | * output - |
367 | * side effects - list of b/e/I modes is cleared | |
368 | */ | |
369 | void | |
330fc5c1 | 370 | free_channel_list(rb_dlink_list * list) |
212380e3 | 371 | { |
330fc5c1 | 372 | rb_dlink_node *ptr; |
637c4932 | 373 | rb_dlink_node *next_ptr; |
212380e3 AC |
374 | struct Ban *actualBan; |
375 | ||
637c4932 | 376 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) |
212380e3 AC |
377 | { |
378 | actualBan = ptr->data; | |
379 | free_ban(actualBan); | |
380 | } | |
381 | ||
382 | list->head = list->tail = NULL; | |
383 | list->length = 0; | |
384 | } | |
385 | ||
386 | /* destroy_channel() | |
387 | * | |
388 | * input - channel to destroy | |
389 | * output - | |
390 | * side effects - channel is obliterated | |
391 | */ | |
392 | void | |
393 | destroy_channel(struct Channel *chptr) | |
394 | { | |
637c4932 | 395 | rb_dlink_node *ptr, *next_ptr; |
212380e3 | 396 | |
637c4932 | 397 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head) |
212380e3 AC |
398 | { |
399 | del_invite(chptr, ptr->data); | |
400 | } | |
401 | ||
402 | /* free all bans/exceptions/denies */ | |
403 | free_channel_list(&chptr->banlist); | |
404 | free_channel_list(&chptr->exceptlist); | |
405 | free_channel_list(&chptr->invexlist); | |
fea1ad52 | 406 | free_channel_list(&chptr->quietlist); |
212380e3 AC |
407 | |
408 | /* Free the topic */ | |
409 | free_topic(chptr); | |
410 | ||
330fc5c1 | 411 | rb_dlinkDelete(&chptr->node, &global_channel_list); |
212380e3 AC |
412 | del_from_channel_hash(chptr->chname, chptr); |
413 | free_channel(chptr); | |
414 | } | |
415 | ||
416 | /* channel_pub_or_secret() | |
417 | * | |
418 | * input - channel | |
419 | * output - "=" if public, "@" if secret, else "*" | |
420 | * side effects - | |
421 | */ | |
422 | static const char * | |
423 | channel_pub_or_secret(struct Channel *chptr) | |
424 | { | |
425 | if(PubChannel(chptr)) | |
426 | return ("="); | |
427 | else if(SecretChannel(chptr)) | |
428 | return ("@"); | |
429 | return ("*"); | |
430 | } | |
431 | ||
432 | /* channel_member_names() | |
433 | * | |
434 | * input - channel to list, client to list to, show endofnames | |
435 | * output - | |
436 | * side effects - client is given list of users on channel | |
437 | */ | |
438 | void | |
439 | channel_member_names(struct Channel *chptr, struct Client *client_p, int show_eon) | |
440 | { | |
441 | struct membership *msptr; | |
442 | struct Client *target_p; | |
330fc5c1 | 443 | rb_dlink_node *ptr; |
212380e3 AC |
444 | char lbuf[BUFSIZE]; |
445 | char *t; | |
446 | int mlen; | |
447 | int tlen; | |
448 | int cur_len; | |
449 | int is_member; | |
450 | int stack = IsCapable(client_p, CLICAP_MULTI_PREFIX); | |
451 | ||
452 | if(ShowChannel(client_p, chptr)) | |
453 | { | |
454 | is_member = IsMember(client_p, chptr); | |
455 | ||
b2f0da88 | 456 | cur_len = mlen = rb_sprintf(lbuf, form_str(RPL_NAMREPLY), |
212380e3 AC |
457 | me.name, client_p->name, |
458 | channel_pub_or_secret(chptr), chptr->chname); | |
459 | ||
460 | t = lbuf + cur_len; | |
461 | ||
5cefa1d6 | 462 | RB_DLINK_FOREACH(ptr, chptr->members.head) |
212380e3 AC |
463 | { |
464 | msptr = ptr->data; | |
465 | target_p = msptr->client_p; | |
466 | ||
467 | if(IsInvisible(target_p) && !is_member) | |
468 | continue; | |
469 | ||
470 | /* space, possible "@+" prefix */ | |
471 | if(cur_len + strlen(target_p->name) + 3 >= BUFSIZE - 3) | |
472 | { | |
473 | *(t - 1) = '\0'; | |
474 | sendto_one(client_p, "%s", lbuf); | |
475 | cur_len = mlen; | |
476 | t = lbuf + mlen; | |
477 | } | |
478 | ||
b2f0da88 | 479 | tlen = rb_sprintf(t, "%s%s ", find_channel_status(msptr, stack), |
212380e3 AC |
480 | target_p->name); |
481 | ||
482 | cur_len += tlen; | |
483 | t += tlen; | |
484 | } | |
485 | ||
486 | /* The old behaviour here was to always output our buffer, | |
487 | * even if there are no clients we can show. This happens | |
488 | * when a client does "NAMES" with no parameters, and all | |
489 | * the clients on a -sp channel are +i. I dont see a good | |
490 | * reason for keeping that behaviour, as it just wastes | |
491 | * bandwidth. --anfl | |
492 | */ | |
493 | if(cur_len != mlen) | |
494 | { | |
495 | *(t - 1) = '\0'; | |
496 | sendto_one(client_p, "%s", lbuf); | |
497 | } | |
498 | } | |
499 | ||
500 | if(show_eon) | |
501 | sendto_one(client_p, form_str(RPL_ENDOFNAMES), | |
502 | me.name, client_p->name, chptr->chname); | |
503 | } | |
504 | ||
505 | /* del_invite() | |
506 | * | |
507 | * input - channel to remove invite from, client to remove | |
508 | * output - | |
509 | * side effects - user is removed from invite list, if exists | |
510 | */ | |
511 | void | |
512 | del_invite(struct Channel *chptr, struct Client *who) | |
513 | { | |
330fc5c1 AC |
514 | rb_dlinkFindDestroy(who, &chptr->invites); |
515 | rb_dlinkFindDestroy(chptr, &who->user->invited); | |
212380e3 AC |
516 | } |
517 | ||
518 | /* is_banned() | |
519 | * | |
520 | * input - channel to check bans for, user to check bans against | |
521 | * optional prebuilt buffers | |
522 | * output - 1 if banned, else 0 | |
523 | * side effects - | |
524 | */ | |
525 | int | |
526 | is_banned(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
765d839d | 527 | const char *s, const char *s2, const char **forward) |
212380e3 AC |
528 | { |
529 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
530 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
531 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
532 | char *s3 = NULL; | |
330fc5c1 | 533 | rb_dlink_node *ptr; |
212380e3 AC |
534 | struct Ban *actualBan = NULL; |
535 | struct Ban *actualExcept = NULL; | |
536 | ||
537 | if(!MyClient(who)) | |
538 | return 0; | |
539 | ||
540 | /* if the buffers havent been built, do it here */ | |
541 | if(s == NULL) | |
542 | { | |
b2f0da88 AC |
543 | rb_sprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); |
544 | rb_sprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
212380e3 AC |
545 | |
546 | s = src_host; | |
547 | s2 = src_iphost; | |
548 | } | |
549 | if(who->localClient->mangledhost != NULL) | |
550 | { | |
551 | /* if host mangling mode enabled, also check their real host */ | |
552 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
553 | { | |
b2f0da88 | 554 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); |
212380e3 AC |
555 | s3 = src_althost; |
556 | } | |
557 | /* if host mangling mode not enabled and no other spoof, | |
558 | * also check the mangled form of their host */ | |
559 | else if (!IsDynSpoof(who)) | |
560 | { | |
b2f0da88 | 561 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); |
212380e3 AC |
562 | s3 = src_althost; |
563 | } | |
564 | } | |
565 | ||
5cefa1d6 | 566 | RB_DLINK_FOREACH(ptr, chptr->banlist.head) |
212380e3 AC |
567 | { |
568 | actualBan = ptr->data; | |
569 | if(match(actualBan->banstr, s) || | |
570 | match(actualBan->banstr, s2) || | |
571 | match_cidr(actualBan->banstr, s2) || | |
572 | match_extban(actualBan->banstr, who, chptr, CHFL_BAN) || | |
573 | (s3 != NULL && match(actualBan->banstr, s3))) | |
574 | break; | |
575 | else | |
576 | actualBan = NULL; | |
577 | } | |
578 | ||
579 | if((actualBan != NULL) && ConfigChannel.use_except) | |
580 | { | |
5cefa1d6 | 581 | RB_DLINK_FOREACH(ptr, chptr->exceptlist.head) |
212380e3 AC |
582 | { |
583 | actualExcept = ptr->data; | |
584 | ||
585 | /* theyre exempted.. */ | |
586 | if(match(actualExcept->banstr, s) || | |
587 | match(actualExcept->banstr, s2) || | |
588 | match_cidr(actualExcept->banstr, s2) || | |
589 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
590 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
591 | { | |
592 | /* cache the fact theyre not banned */ | |
593 | if(msptr != NULL) | |
594 | { | |
595 | msptr->bants = chptr->bants; | |
596 | msptr->flags &= ~CHFL_BANNED; | |
597 | } | |
598 | ||
599 | return CHFL_EXCEPTION; | |
600 | } | |
601 | } | |
602 | } | |
603 | ||
604 | /* cache the banned/not banned status */ | |
605 | if(msptr != NULL) | |
606 | { | |
607 | msptr->bants = chptr->bants; | |
608 | ||
609 | if(actualBan != NULL) | |
610 | { | |
611 | msptr->flags |= CHFL_BANNED; | |
612 | return CHFL_BAN; | |
613 | } | |
614 | else | |
615 | { | |
616 | msptr->flags &= ~CHFL_BANNED; | |
617 | return 0; | |
618 | } | |
619 | } | |
620 | ||
765d839d EM |
621 | if (actualBan && actualBan->forward && forward) |
622 | *forward = actualBan->forward; | |
623 | ||
212380e3 AC |
624 | return ((actualBan ? CHFL_BAN : 0)); |
625 | } | |
626 | ||
627 | /* is_quieted() | |
628 | * | |
629 | * input - channel to check bans for, user to check bans against | |
630 | * optional prebuilt buffers | |
631 | * output - 1 if banned, else 0 | |
632 | * side effects - | |
633 | */ | |
634 | int | |
635 | is_quieted(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
636 | const char *s, const char *s2) | |
637 | { | |
638 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
639 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
640 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
641 | char *s3 = NULL; | |
330fc5c1 | 642 | rb_dlink_node *ptr; |
212380e3 AC |
643 | struct Ban *actualBan = NULL; |
644 | struct Ban *actualExcept = NULL; | |
645 | ||
646 | if(!MyClient(who)) | |
647 | return 0; | |
648 | ||
649 | /* if the buffers havent been built, do it here */ | |
650 | if(s == NULL) | |
651 | { | |
b2f0da88 AC |
652 | rb_sprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); |
653 | rb_sprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
212380e3 AC |
654 | |
655 | s = src_host; | |
656 | s2 = src_iphost; | |
657 | } | |
658 | if(who->localClient->mangledhost != NULL) | |
659 | { | |
660 | /* if host mangling mode enabled, also check their real host */ | |
661 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
662 | { | |
b2f0da88 | 663 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); |
212380e3 AC |
664 | s3 = src_althost; |
665 | } | |
666 | /* if host mangling mode not enabled and no other spoof, | |
667 | * also check the mangled form of their host */ | |
668 | else if (!IsDynSpoof(who)) | |
669 | { | |
b2f0da88 | 670 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); |
212380e3 AC |
671 | s3 = src_althost; |
672 | } | |
673 | } | |
674 | ||
5cefa1d6 | 675 | RB_DLINK_FOREACH(ptr, chptr->quietlist.head) |
212380e3 AC |
676 | { |
677 | actualBan = ptr->data; | |
678 | if(match(actualBan->banstr, s) || | |
679 | match(actualBan->banstr, s2) || | |
680 | match_cidr(actualBan->banstr, s2) || | |
681 | match_extban(actualBan->banstr, who, chptr, CHFL_QUIET) || | |
682 | (s3 != NULL && match(actualBan->banstr, s3))) | |
683 | break; | |
684 | else | |
685 | actualBan = NULL; | |
686 | } | |
687 | ||
688 | if((actualBan != NULL) && ConfigChannel.use_except) | |
689 | { | |
5cefa1d6 | 690 | RB_DLINK_FOREACH(ptr, chptr->exceptlist.head) |
212380e3 AC |
691 | { |
692 | actualExcept = ptr->data; | |
693 | ||
694 | /* theyre exempted.. */ | |
695 | if(match(actualExcept->banstr, s) || | |
696 | match(actualExcept->banstr, s2) || | |
697 | match_cidr(actualExcept->banstr, s2) || | |
698 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
699 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
700 | { | |
701 | /* cache the fact theyre not banned */ | |
702 | if(msptr != NULL) | |
703 | { | |
704 | msptr->bants = chptr->bants; | |
705 | msptr->flags &= ~CHFL_BANNED; | |
706 | } | |
707 | ||
708 | return CHFL_EXCEPTION; | |
709 | } | |
710 | } | |
711 | } | |
712 | ||
713 | /* cache the banned/not banned status */ | |
714 | if(msptr != NULL) | |
715 | { | |
716 | msptr->bants = chptr->bants; | |
717 | ||
718 | if(actualBan != NULL) | |
719 | { | |
720 | msptr->flags |= CHFL_BANNED; | |
721 | return CHFL_BAN; | |
722 | } | |
723 | else | |
724 | { | |
725 | msptr->flags &= ~CHFL_BANNED; | |
726 | return 0; | |
727 | } | |
728 | } | |
729 | ||
730 | return ((actualBan ? CHFL_BAN : 0)); | |
731 | } | |
732 | ||
733 | /* can_join() | |
734 | * | |
735 | * input - client to check, channel to check for, key | |
765d839d | 736 | * output - reason for not being able to join, else 0, channel name to forward to |
212380e3 | 737 | * side effects - |
a63f7af7 | 738 | * caveats - this function should only be called on a local user. |
212380e3 AC |
739 | */ |
740 | int | |
765d839d | 741 | can_join(struct Client *source_p, struct Channel *chptr, char *key, char **forward) |
212380e3 | 742 | { |
330fc5c1 AC |
743 | rb_dlink_node *invite = NULL; |
744 | rb_dlink_node *ptr; | |
212380e3 AC |
745 | struct Ban *invex = NULL; |
746 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
747 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
748 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
749 | int use_althost = 0; | |
1ebf4db4 | 750 | int i = 0; |
212380e3 AC |
751 | hook_data_channel moduledata; |
752 | ||
753 | s_assert(source_p->localClient != NULL); | |
754 | ||
8bb19bd7 AC |
755 | moduledata.client = source_p; |
756 | moduledata.chptr = chptr; | |
757 | moduledata.approved = 0; | |
758 | ||
b2f0da88 AC |
759 | rb_sprintf(src_host, "%s!%s@%s", source_p->name, source_p->username, source_p->host); |
760 | rb_sprintf(src_iphost, "%s!%s@%s", source_p->name, source_p->username, source_p->sockhost); | |
212380e3 AC |
761 | if(source_p->localClient->mangledhost != NULL) |
762 | { | |
763 | /* if host mangling mode enabled, also check their real host */ | |
764 | if(!strcmp(source_p->host, source_p->localClient->mangledhost)) | |
765 | { | |
b2f0da88 | 766 | rb_sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->orighost); |
212380e3 AC |
767 | use_althost = 1; |
768 | } | |
769 | /* if host mangling mode not enabled and no other spoof, | |
770 | * also check the mangled form of their host */ | |
771 | else if (!IsDynSpoof(source_p)) | |
772 | { | |
b2f0da88 | 773 | rb_sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->localClient->mangledhost); |
212380e3 AC |
774 | use_althost = 1; |
775 | } | |
776 | } | |
777 | ||
765d839d | 778 | if((is_banned(chptr, source_p, NULL, src_host, src_iphost, forward)) == CHFL_BAN) |
8bb19bd7 AC |
779 | { |
780 | moduledata.approved = ERR_BANNEDFROMCHAN; | |
781 | goto finish_join_check; | |
782 | } | |
212380e3 | 783 | |
765d839d EM |
784 | if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key))) |
785 | { | |
786 | moduledata.approved = ERR_BADCHANNELKEY; | |
787 | goto finish_join_check; | |
788 | } | |
789 | ||
790 | /* All checks from this point on will forward... */ | |
791 | if(forward) | |
792 | *forward = chptr->mode.forward; | |
793 | ||
212380e3 AC |
794 | if(chptr->mode.mode & MODE_INVITEONLY) |
795 | { | |
5cefa1d6 | 796 | RB_DLINK_FOREACH(invite, source_p->user->invited.head) |
212380e3 | 797 | { |
1ebf4db4 | 798 | if(invite->data == chptr) |
212380e3 AC |
799 | break; |
800 | } | |
1ebf4db4 | 801 | if(invite == NULL) |
212380e3 AC |
802 | { |
803 | if(!ConfigChannel.use_invex) | |
8bb19bd7 | 804 | moduledata.approved = ERR_INVITEONLYCHAN; |
5cefa1d6 | 805 | RB_DLINK_FOREACH(ptr, chptr->invexlist.head) |
212380e3 AC |
806 | { |
807 | invex = ptr->data; | |
808 | if(match(invex->banstr, src_host) | |
809 | || match(invex->banstr, src_iphost) | |
810 | || match_cidr(invex->banstr, src_iphost) | |
811 | || match_extban(invex->banstr, source_p, chptr, CHFL_INVEX) | |
812 | || (use_althost && match(invex->banstr, src_althost))) | |
813 | break; | |
814 | } | |
815 | if(ptr == NULL) | |
8bb19bd7 | 816 | moduledata.approved = ERR_INVITEONLYCHAN; |
212380e3 AC |
817 | } |
818 | } | |
819 | ||
212380e3 | 820 | if(chptr->mode.limit && |
330fc5c1 | 821 | rb_dlink_list_length(&chptr->members) >= (unsigned long) chptr->mode.limit) |
1ebf4db4 | 822 | i = ERR_CHANNELISFULL; |
212380e3 | 823 | if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser)) |
1ebf4db4 | 824 | i = ERR_NEEDREGGEDNICK; |
212380e3 | 825 | /* join throttling stuff --nenolod */ |
1ebf4db4 | 826 | else if(chptr->mode.join_num > 0 && chptr->mode.join_time > 0) |
212380e3 | 827 | { |
e3354945 | 828 | if ((rb_current_time() - chptr->join_delta <= |
212380e3 AC |
829 | chptr->mode.join_time) && (chptr->join_count >= |
830 | chptr->mode.join_num)) | |
1ebf4db4 JT |
831 | i = ERR_THROTTLE; |
832 | } | |
833 | ||
834 | /* allow /invite to override +l/+r/+j also -- jilles */ | |
835 | if (i != 0 && invite == NULL) | |
836 | { | |
5cefa1d6 | 837 | RB_DLINK_FOREACH(invite, source_p->user->invited.head) |
1ebf4db4 JT |
838 | { |
839 | if(invite->data == chptr) | |
840 | break; | |
841 | } | |
842 | if (invite == NULL) | |
8bb19bd7 | 843 | moduledata.approved = i; |
212380e3 AC |
844 | } |
845 | ||
8bb19bd7 | 846 | finish_join_check: |
212380e3 AC |
847 | call_hook(h_can_join, &moduledata); |
848 | ||
849 | return moduledata.approved; | |
850 | } | |
851 | ||
852 | /* can_send() | |
853 | * | |
854 | * input - user to check in channel, membership pointer | |
855 | * output - whether can explicitly send or not, else CAN_SEND_NONOP | |
856 | * side effects - | |
857 | */ | |
858 | int | |
859 | can_send(struct Channel *chptr, struct Client *source_p, struct membership *msptr) | |
860 | { | |
0aa36c5f AC |
861 | hook_data_channel_approval moduledata; |
862 | ||
863 | moduledata.approved = CAN_SEND_NONOP; | |
864 | ||
212380e3 AC |
865 | if(IsServer(source_p) || IsService(source_p)) |
866 | return CAN_SEND_OPV; | |
867 | ||
868 | if(MyClient(source_p) && hash_find_resv(chptr->chname) && | |
869 | !IsOper(source_p) && !IsExemptResv(source_p)) | |
0aa36c5f | 870 | moduledata.approved = CAN_SEND_NO; |
212380e3 AC |
871 | |
872 | if(msptr == NULL) | |
873 | { | |
874 | msptr = find_channel_membership(chptr, source_p); | |
875 | ||
876 | if(msptr == NULL) | |
877 | { | |
878 | /* if its +m or +n and theyre not in the channel, | |
879 | * they cant send. we dont check bans here because | |
880 | * theres no possibility of caching them --fl | |
881 | */ | |
882 | if(chptr->mode.mode & MODE_NOPRIVMSGS || chptr->mode.mode & MODE_MODERATED) | |
0aa36c5f | 883 | moduledata.approved = CAN_SEND_NO; |
212380e3 | 884 | else |
0aa36c5f | 885 | moduledata.approved = CAN_SEND_NONOP; |
b697041e AC |
886 | |
887 | return moduledata.approved; | |
212380e3 AC |
888 | } |
889 | } | |
890 | ||
212380e3 | 891 | if(chptr->mode.mode & MODE_MODERATED) |
0aa36c5f | 892 | moduledata.approved = CAN_SEND_NO; |
212380e3 AC |
893 | |
894 | if(MyClient(source_p)) | |
895 | { | |
896 | /* cached can_send */ | |
897 | if(msptr->bants == chptr->bants) | |
898 | { | |
899 | if(can_send_banned(msptr)) | |
0aa36c5f | 900 | moduledata.approved = CAN_SEND_NO; |
212380e3 | 901 | } |
765d839d | 902 | else if(is_banned(chptr, source_p, msptr, NULL, NULL, NULL) == CHFL_BAN |
212380e3 | 903 | || is_quieted(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN) |
0aa36c5f | 904 | moduledata.approved = CAN_SEND_NO; |
212380e3 AC |
905 | } |
906 | ||
e06988c6 AC |
907 | if(is_chanop_voiced(msptr)) |
908 | moduledata.approved = CAN_SEND_OPV; | |
909 | ||
f4b52a0a EM |
910 | moduledata.client = source_p; |
911 | moduledata.chptr = msptr->chptr; | |
912 | moduledata.msptr = msptr; | |
913 | moduledata.target = NULL; | |
914 | ||
0aa36c5f AC |
915 | call_hook(h_can_send, &moduledata); |
916 | ||
917 | return moduledata.approved; | |
212380e3 AC |
918 | } |
919 | ||
15484f02 BG |
920 | /* |
921 | * flood_attack_channel | |
922 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
923 | * says NOTICE must not auto reply | |
924 | * - pointer to source Client | |
925 | * - pointer to target channel | |
926 | * output - 1 if target is under flood attack | |
927 | * side effects - check for flood attack on target chptr | |
928 | */ | |
929 | int | |
930 | flood_attack_channel(int p_or_n, struct Client *source_p, struct Channel *chptr, char *chname) | |
931 | { | |
932 | int delta; | |
933 | ||
934 | if(GlobalSetOptions.floodcount && MyClient(source_p)) | |
935 | { | |
936 | if((chptr->first_received_message_time + 1) < rb_current_time()) | |
937 | { | |
938 | delta = rb_current_time() - chptr->first_received_message_time; | |
939 | chptr->received_number_of_privmsgs -= delta; | |
940 | chptr->first_received_message_time = rb_current_time(); | |
941 | if(chptr->received_number_of_privmsgs <= 0) | |
942 | { | |
943 | chptr->received_number_of_privmsgs = 0; | |
944 | chptr->flood_noticed = 0; | |
945 | } | |
946 | } | |
947 | ||
948 | if((chptr->received_number_of_privmsgs >= GlobalSetOptions.floodcount) | |
949 | || chptr->flood_noticed) | |
950 | { | |
951 | if(chptr->flood_noticed == 0) | |
952 | { | |
953 | sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE, | |
954 | "Possible Flooder %s[%s@%s] on %s target: %s", | |
955 | source_p->name, source_p->username, | |
956 | source_p->orighost, | |
957 | source_p->servptr->name, chptr->chname); | |
958 | chptr->flood_noticed = 1; | |
959 | ||
960 | /* Add a bit of penalty */ | |
961 | chptr->received_number_of_privmsgs += 2; | |
962 | } | |
963 | if(MyClient(source_p) && (p_or_n != 1)) | |
964 | sendto_one(source_p, | |
965 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
966 | me.name, source_p->name, chptr->chname); | |
967 | return 1; | |
968 | } | |
969 | else | |
970 | chptr->received_number_of_privmsgs++; | |
971 | } | |
972 | ||
973 | return 0; | |
974 | } | |
975 | ||
212380e3 AC |
976 | /* find_bannickchange_channel() |
977 | * Input: client to check | |
978 | * Output: channel preventing nick change | |
979 | */ | |
980 | struct Channel * | |
981 | find_bannickchange_channel(struct Client *client_p) | |
982 | { | |
983 | struct Channel *chptr; | |
984 | struct membership *msptr; | |
330fc5c1 | 985 | rb_dlink_node *ptr; |
212380e3 AC |
986 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; |
987 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
988 | ||
989 | if (!MyClient(client_p)) | |
990 | return NULL; | |
991 | ||
b2f0da88 AC |
992 | rb_sprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host); |
993 | rb_sprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost); | |
212380e3 | 994 | |
5cefa1d6 | 995 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) |
212380e3 AC |
996 | { |
997 | msptr = ptr->data; | |
998 | chptr = msptr->chptr; | |
999 | if (is_chanop_voiced(msptr)) | |
1000 | continue; | |
1001 | /* cached can_send */ | |
1002 | if (msptr->bants == chptr->bants) | |
1003 | { | |
1004 | if (can_send_banned(msptr)) | |
1005 | return chptr; | |
1006 | } | |
765d839d | 1007 | else if (is_banned(chptr, client_p, msptr, src_host, src_iphost, NULL) == CHFL_BAN |
212380e3 AC |
1008 | || is_quieted(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN) |
1009 | return chptr; | |
1010 | } | |
1011 | return NULL; | |
1012 | } | |
1013 | ||
1014 | /* void check_spambot_warning(struct Client *source_p) | |
1015 | * Input: Client to check, channel name or NULL if this is a part. | |
1016 | * Output: none | |
1017 | * Side-effects: Updates the client's oper_warn_count_down, warns the | |
1018 | * IRC operators if necessary, and updates join_leave_countdown as | |
1019 | * needed. | |
1020 | */ | |
1021 | void | |
1022 | check_spambot_warning(struct Client *source_p, const char *name) | |
1023 | { | |
1024 | int t_delta; | |
1025 | int decrement_count; | |
1026 | if((GlobalSetOptions.spam_num && | |
1027 | (source_p->localClient->join_leave_count >= GlobalSetOptions.spam_num))) | |
1028 | { | |
1029 | if(source_p->localClient->oper_warn_count_down > 0) | |
1030 | source_p->localClient->oper_warn_count_down--; | |
1031 | else | |
1032 | source_p->localClient->oper_warn_count_down = 0; | |
e0c1f4ec JT |
1033 | if(source_p->localClient->oper_warn_count_down == 0 && |
1034 | name != NULL) | |
212380e3 AC |
1035 | { |
1036 | /* Its already known as a possible spambot */ | |
e0c1f4ec JT |
1037 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, |
1038 | "User %s (%s@%s) trying to join %s is a possible spambot", | |
1039 | source_p->name, | |
1040 | source_p->username, source_p->orighost, name); | |
212380e3 AC |
1041 | source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
1042 | } | |
1043 | } | |
1044 | else | |
1045 | { | |
1046 | if((t_delta = | |
e3354945 | 1047 | (rb_current_time() - source_p->localClient->last_leave_time)) > |
212380e3 AC |
1048 | JOIN_LEAVE_COUNT_EXPIRE_TIME) |
1049 | { | |
1050 | decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); | |
981586df JT |
1051 | if(name != NULL) |
1052 | ; | |
1053 | else if(decrement_count > source_p->localClient->join_leave_count) | |
212380e3 AC |
1054 | source_p->localClient->join_leave_count = 0; |
1055 | else | |
1056 | source_p->localClient->join_leave_count -= decrement_count; | |
1057 | } | |
1058 | else | |
1059 | { | |
e3354945 | 1060 | if((rb_current_time() - |
212380e3 AC |
1061 | (source_p->localClient->last_join_time)) < GlobalSetOptions.spam_time) |
1062 | { | |
1063 | /* oh, its a possible spambot */ | |
1064 | source_p->localClient->join_leave_count++; | |
1065 | } | |
1066 | } | |
1067 | if(name != NULL) | |
e3354945 | 1068 | source_p->localClient->last_join_time = rb_current_time(); |
212380e3 | 1069 | else |
e3354945 | 1070 | source_p->localClient->last_leave_time = rb_current_time(); |
212380e3 AC |
1071 | } |
1072 | } | |
1073 | ||
1074 | /* check_splitmode() | |
1075 | * | |
1076 | * input - | |
1077 | * output - | |
1078 | * side effects - compares usercount and servercount against their split | |
1079 | * values and adjusts splitmode accordingly | |
1080 | */ | |
1081 | void | |
1082 | check_splitmode(void *unused) | |
1083 | { | |
1084 | if(splitchecking && (ConfigChannel.no_join_on_split || ConfigChannel.no_create_on_split)) | |
1085 | { | |
1086 | /* not split, we're being asked to check now because someone | |
1087 | * has left | |
1088 | */ | |
1089 | if(!splitmode) | |
1090 | { | |
1091 | if(eob_count < split_servers || Count.total < split_users) | |
1092 | { | |
1093 | splitmode = 1; | |
1094 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
1095 | "Network split, activating splitmode"); | |
c608a061 | 1096 | check_splitmode_ev = rb_event_addish("check_splitmode", check_splitmode, NULL, 2); |
212380e3 AC |
1097 | } |
1098 | } | |
1099 | /* in splitmode, check whether its finished */ | |
1100 | else if(eob_count >= split_servers && Count.total >= split_users) | |
1101 | { | |
1102 | splitmode = 0; | |
1103 | ||
1104 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
1105 | "Network rejoined, deactivating splitmode"); | |
1106 | ||
c608a061 | 1107 | rb_event_delete(check_splitmode_ev); |
6a309903 | 1108 | check_splitmode_ev = NULL; |
212380e3 AC |
1109 | } |
1110 | } | |
1111 | } | |
1112 | ||
1113 | ||
1114 | /* allocate_topic() | |
1115 | * | |
1116 | * input - channel to allocate topic for | |
1117 | * output - 1 on success, else 0 | |
1118 | * side effects - channel gets a topic allocated | |
1119 | */ | |
1120 | static void | |
1121 | allocate_topic(struct Channel *chptr) | |
1122 | { | |
1123 | void *ptr; | |
1124 | ||
1125 | if(chptr == NULL) | |
1126 | return; | |
1127 | ||
398b6a73 | 1128 | ptr = rb_bh_alloc(topic_heap); |
212380e3 AC |
1129 | |
1130 | /* Basically we allocate one large block for the topic and | |
1131 | * the topic info. We then split it up into two and shove it | |
1132 | * in the chptr | |
1133 | */ | |
1134 | chptr->topic = ptr; | |
1135 | chptr->topic_info = (char *) ptr + TOPICLEN + 1; | |
1136 | *chptr->topic = '\0'; | |
1137 | *chptr->topic_info = '\0'; | |
1138 | } | |
1139 | ||
1140 | /* free_topic() | |
1141 | * | |
1142 | * input - channel which has topic to free | |
1143 | * output - | |
1144 | * side effects - channels topic is free'd | |
1145 | */ | |
1146 | static void | |
1147 | free_topic(struct Channel *chptr) | |
1148 | { | |
1149 | void *ptr; | |
1150 | ||
1151 | if(chptr == NULL || chptr->topic == NULL) | |
1152 | return; | |
1153 | ||
1154 | /* This is safe for now - If you change allocate_topic you | |
1155 | * MUST change this as well | |
1156 | */ | |
1157 | ptr = chptr->topic; | |
398b6a73 | 1158 | rb_bh_free(topic_heap, ptr); |
212380e3 AC |
1159 | chptr->topic = NULL; |
1160 | chptr->topic_info = NULL; | |
1161 | } | |
1162 | ||
1163 | /* set_channel_topic() | |
1164 | * | |
1165 | * input - channel, topic to set, topic info and topic ts | |
1166 | * output - | |
1167 | * side effects - channels topic, topic info and TS are set. | |
1168 | */ | |
1169 | void | |
1170 | set_channel_topic(struct Channel *chptr, const char *topic, const char *topic_info, time_t topicts) | |
1171 | { | |
1172 | if(strlen(topic) > 0) | |
1173 | { | |
1174 | if(chptr->topic == NULL) | |
1175 | allocate_topic(chptr); | |
f427c8b0 VY |
1176 | rb_strlcpy(chptr->topic, topic, TOPICLEN + 1); |
1177 | rb_strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN); | |
212380e3 AC |
1178 | chptr->topic_time = topicts; |
1179 | } | |
1180 | else | |
1181 | { | |
1182 | if(chptr->topic != NULL) | |
1183 | free_topic(chptr); | |
1184 | chptr->topic_time = 0; | |
1185 | } | |
1186 | } | |
1187 | ||
3b8a6350 | 1188 | /* channel_modes() |
212380e3 AC |
1189 | * |
1190 | * inputs - pointer to channel | |
1191 | * - pointer to client | |
f1e35c19 JT |
1192 | * output - string with simple modes |
1193 | * side effects - result from previous calls overwritten | |
212380e3 AC |
1194 | * |
1195 | * Stolen from ShadowIRCd 4 --nenolod | |
1196 | */ | |
1197 | const char * | |
3b8a6350 | 1198 | channel_modes(struct Channel *chptr, struct Client *client_p) |
212380e3 AC |
1199 | { |
1200 | int i; | |
1201 | char buf1[BUFSIZE]; | |
1202 | char buf2[BUFSIZE]; | |
1203 | static char final[BUFSIZE]; | |
1204 | char *mbuf = buf1; | |
1205 | char *pbuf = buf2; | |
1206 | ||
1207 | *mbuf++ = '+'; | |
1208 | *pbuf = '\0'; | |
1209 | ||
efccc22c | 1210 | for (i = 0; i < 256; i++) |
3b8a6350 | 1211 | if(chptr->mode.mode & chmode_flags[i]) |
efccc22c | 1212 | *mbuf++ = i; |
212380e3 | 1213 | |
3b8a6350 | 1214 | if(chptr->mode.limit) |
212380e3 AC |
1215 | { |
1216 | *mbuf++ = 'l'; | |
1217 | ||
f1e35c19 | 1218 | if(!IsClient(client_p) || IsMember(client_p, chptr)) |
3b8a6350 | 1219 | pbuf += rb_sprintf(pbuf, " %d", chptr->mode.limit); |
212380e3 AC |
1220 | } |
1221 | ||
3b8a6350 | 1222 | if(*chptr->mode.key) |
212380e3 AC |
1223 | { |
1224 | *mbuf++ = 'k'; | |
1225 | ||
f1e35c19 | 1226 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) |
3b8a6350 | 1227 | pbuf += rb_sprintf(pbuf, " %s", chptr->mode.key); |
212380e3 AC |
1228 | } |
1229 | ||
3b8a6350 | 1230 | if(chptr->mode.join_num) |
212380e3 AC |
1231 | { |
1232 | *mbuf++ = 'j'; | |
1233 | ||
f1e35c19 | 1234 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) |
3b8a6350 SB |
1235 | pbuf += rb_sprintf(pbuf, " %d:%d", chptr->mode.join_num, |
1236 | chptr->mode.join_time); | |
212380e3 AC |
1237 | } |
1238 | ||
2da6f6eb JT |
1239 | if(*chptr->mode.forward && |
1240 | (ConfigChannel.use_forward || !IsClient(client_p))) | |
212380e3 AC |
1241 | { |
1242 | *mbuf++ = 'f'; | |
1243 | ||
f1e35c19 | 1244 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) |
3b8a6350 | 1245 | pbuf += rb_sprintf(pbuf, " %s", chptr->mode.forward); |
212380e3 AC |
1246 | } |
1247 | ||
1248 | *mbuf = '\0'; | |
1249 | ||
f427c8b0 | 1250 | rb_strlcpy(final, buf1, sizeof final); |
1f9de103 | 1251 | rb_strlcat(final, buf2, sizeof final); |
212380e3 AC |
1252 | return final; |
1253 | } | |
1254 | ||
1255 | /* Now lets do some stuff to keep track of what combinations of | |
1256 | * servers exist... | |
1257 | * Note that the number of combinations doubles each time you add | |
1258 | * something to this list. Each one is only quick if no servers use that | |
1259 | * combination, but if the numbers get too high here MODE will get too | |
1260 | * slow. I suggest if you get more than 7 here, you consider getting rid | |
1261 | * of some and merging or something. If it wasn't for irc+cs we would | |
1262 | * probably not even need to bother about most of these, but unfortunately | |
1263 | * we do. -A1kmm | |
1264 | */ | |
1265 | ||
1266 | /* void init_chcap_usage_counts(void) | |
1267 | * | |
1268 | * Inputs - none | |
1269 | * Output - none | |
1270 | * Side-effects - Initialises the usage counts to zero. Fills in the | |
1271 | * chcap_yes and chcap_no combination tables. | |
1272 | */ | |
1273 | void | |
1274 | init_chcap_usage_counts(void) | |
1275 | { | |
1276 | unsigned long m, c, y, n; | |
1277 | ||
1278 | memset(chcap_combos, 0, sizeof(chcap_combos)); | |
1279 | ||
1280 | /* For every possible combination */ | |
1281 | for (m = 0; m < NCHCAP_COMBOS; m++) | |
1282 | { | |
1283 | /* Check each capab */ | |
1284 | for (c = y = n = 0; c < NCHCAPS; c++) | |
1285 | { | |
1286 | if((m & (1 << c)) == 0) | |
1287 | n |= channel_capabs[c]; | |
1288 | else | |
1289 | y |= channel_capabs[c]; | |
1290 | } | |
1291 | chcap_combos[m].cap_yes = y; | |
1292 | chcap_combos[m].cap_no = n; | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1297 | * Input: serv_p; The client whose capabs to register. | |
1298 | * Output: none | |
1299 | * Side-effects: Increments the usage counts for the correct capab | |
1300 | * combination. | |
1301 | */ | |
1302 | void | |
1303 | set_chcap_usage_counts(struct Client *serv_p) | |
1304 | { | |
1305 | int n; | |
1306 | ||
1307 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1308 | { | |
1309 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1310 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1311 | { | |
1312 | chcap_combos[n].count++; | |
1313 | return; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | /* This should be impossible -A1kmm. */ | |
1318 | s_assert(0); | |
1319 | } | |
1320 | ||
1321 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1322 | * | |
1323 | * Inputs - serv_p; The client whose capabs to register. | |
1324 | * Output - none | |
1325 | * Side-effects - Decrements the usage counts for the correct capab | |
1326 | * combination. | |
1327 | */ | |
1328 | void | |
1329 | unset_chcap_usage_counts(struct Client *serv_p) | |
1330 | { | |
1331 | int n; | |
1332 | ||
1333 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1334 | { | |
1335 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1336 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1337 | { | |
1338 | /* Hopefully capabs can't change dynamically or anything... */ | |
1339 | s_assert(chcap_combos[n].count > 0); | |
1340 | ||
1341 | if(chcap_combos[n].count > 0) | |
1342 | chcap_combos[n].count--; | |
1343 | return; | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | /* This should be impossible -A1kmm. */ | |
1348 | s_assert(0); | |
1349 | } | |
1350 | ||
1351 | /* void send_cap_mode_changes(struct Client *client_p, | |
1352 | * struct Client *source_p, | |
1353 | * struct Channel *chptr, int cap, int nocap) | |
1354 | * Input: The client sending(client_p), the source client(source_p), | |
1355 | * the channel to send mode changes for(chptr) | |
1356 | * Output: None. | |
1357 | * Side-effects: Sends the appropriate mode changes to capable servers. | |
1358 | * | |
1359 | * Reverted back to my original design, except that we now keep a count | |
1360 | * of the number of servers which each combination as an optimisation, so | |
1361 | * the capabs combinations which are not needed are not worked out. -A1kmm | |
1362 | */ | |
1363 | void | |
1364 | send_cap_mode_changes(struct Client *client_p, struct Client *source_p, | |
1365 | struct Channel *chptr, struct ChModeChange mode_changes[], int mode_count) | |
1366 | { | |
1367 | static char modebuf[BUFSIZE]; | |
1368 | static char parabuf[BUFSIZE]; | |
1369 | int i, mbl, pbl, nc, mc, preflen, len; | |
1370 | char *pbuf; | |
1371 | const char *arg; | |
1372 | int dir; | |
1373 | int j; | |
1374 | int cap; | |
1375 | int nocap; | |
1376 | int arglen; | |
1377 | ||
1378 | /* Now send to servers... */ | |
1379 | for (j = 0; j < NCHCAP_COMBOS; j++) | |
1380 | { | |
1381 | if(chcap_combos[j].count == 0) | |
1382 | continue; | |
1383 | ||
1384 | mc = 0; | |
1385 | nc = 0; | |
1386 | pbl = 0; | |
1387 | parabuf[0] = 0; | |
1388 | pbuf = parabuf; | |
1389 | dir = MODE_QUERY; | |
1390 | ||
1391 | cap = chcap_combos[j].cap_yes; | |
1392 | nocap = chcap_combos[j].cap_no; | |
1393 | ||
469c9689 AC |
1394 | mbl = preflen = rb_sprintf(modebuf, ":%s TMODE %ld %s ", |
1395 | use_id(source_p), (long) chptr->channelts, | |
1396 | chptr->chname); | |
212380e3 AC |
1397 | |
1398 | /* loop the list of - modes we have */ | |
1399 | for (i = 0; i < mode_count; i++) | |
1400 | { | |
1401 | /* if they dont support the cap we need, or they do support a cap they | |
1402 | * cant have, then dont add it to the modebuf.. that way they wont see | |
1403 | * the mode | |
1404 | */ | |
1405 | if((mode_changes[i].letter == 0) || | |
1406 | ((cap & mode_changes[i].caps) != mode_changes[i].caps) | |
1407 | || ((nocap & mode_changes[i].nocaps) != mode_changes[i].nocaps)) | |
1408 | continue; | |
1409 | ||
fd44b851 JT |
1410 | if(!EmptyString(mode_changes[i].id)) |
1411 | arg = mode_changes[i].id; | |
1412 | else | |
1413 | arg = mode_changes[i].arg; | |
212380e3 AC |
1414 | |
1415 | if(arg) | |
1416 | { | |
1417 | arglen = strlen(arg); | |
1418 | ||
1419 | /* dont even think about it! --fl */ | |
1420 | if(arglen > MODEBUFLEN - 5) | |
1421 | continue; | |
1422 | } | |
1423 | ||
1424 | /* if we're creeping past the buf size, we need to send it and make | |
1425 | * another line for the other modes | |
1426 | * XXX - this could give away server topology with uids being | |
1427 | * different lengths, but not much we can do, except possibly break | |
1428 | * them as if they were the longest of the nick or uid at all times, | |
1429 | * which even then won't work as we don't always know the uid -A1kmm. | |
1430 | */ | |
1431 | if(arg && ((mc == MAXMODEPARAMSSERV) || | |
1432 | ((mbl + pbl + arglen + 4) > (BUFSIZE - 3)))) | |
1433 | { | |
1434 | if(nc != 0) | |
1435 | sendto_server(client_p, chptr, cap, nocap, | |
1436 | "%s %s", modebuf, parabuf); | |
1437 | nc = 0; | |
1438 | mc = 0; | |
1439 | ||
1440 | mbl = preflen; | |
1441 | pbl = 0; | |
1442 | pbuf = parabuf; | |
1443 | parabuf[0] = 0; | |
1444 | dir = MODE_QUERY; | |
1445 | } | |
1446 | ||
1447 | if(dir != mode_changes[i].dir) | |
1448 | { | |
1449 | modebuf[mbl++] = (mode_changes[i].dir == MODE_ADD) ? '+' : '-'; | |
1450 | dir = mode_changes[i].dir; | |
1451 | } | |
1452 | ||
1453 | modebuf[mbl++] = mode_changes[i].letter; | |
1454 | modebuf[mbl] = 0; | |
1455 | nc++; | |
1456 | ||
1457 | if(arg != NULL) | |
1458 | { | |
b2f0da88 | 1459 | len = rb_sprintf(pbuf, "%s ", arg); |
212380e3 AC |
1460 | pbuf += len; |
1461 | pbl += len; | |
1462 | mc++; | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | if(pbl && parabuf[pbl - 1] == ' ') | |
1467 | parabuf[pbl - 1] = 0; | |
1468 | ||
1469 | if(nc != 0) | |
1470 | sendto_server(client_p, chptr, cap, nocap, "%s %s", modebuf, parabuf); | |
1471 | } | |
1472 | } | |
dca9e552 JT |
1473 | |
1474 | void | |
1475 | resv_chan_forcepart(const char *name, const char *reason, int temp_time) | |
1476 | { | |
1477 | rb_dlink_node *ptr; | |
1478 | rb_dlink_node *next_ptr; | |
1479 | struct Channel *chptr; | |
1480 | struct membership *msptr; | |
1481 | struct Client *target_p; | |
1482 | ||
1483 | if(!ConfigChannel.resv_forcepart) | |
1484 | return; | |
1485 | ||
1486 | /* for each user on our server in the channel list | |
1487 | * send them a PART, and notify opers. | |
1488 | */ | |
1489 | chptr = find_channel(name); | |
1490 | if(chptr != NULL) | |
1491 | { | |
1492 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head) | |
1493 | { | |
1494 | msptr = ptr->data; | |
1495 | target_p = msptr->client_p; | |
1496 | ||
1497 | if(IsExemptResv(target_p)) | |
1498 | continue; | |
1499 | ||
1500 | sendto_server(target_p, chptr, CAP_TS6, NOCAPS, | |
1501 | ":%s PART %s", target_p->id, chptr->chname); | |
1502 | ||
1503 | sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s PART %s :%s", | |
1504 | target_p->name, target_p->username, | |
1505 | target_p->host, chptr->chname, target_p->name); | |
1506 | ||
1507 | remove_user_from_channel(msptr); | |
1508 | ||
1509 | /* notify opers & user they were removed from the channel */ | |
1510 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
1511 | "Forced PART for %s!%s@%s from %s (%s)", | |
1512 | target_p->name, target_p->username, | |
1513 | target_p->host, name, reason); | |
1514 | ||
1515 | if(temp_time > 0) | |
1516 | sendto_one_notice(target_p, ":*** Channel %s is temporarily unavailable on this server.", | |
1517 | name); | |
1518 | else | |
1519 | sendto_one_notice(target_p, ":*** Channel %s is no longer available on this server.", | |
1520 | name); | |
1521 | } | |
1522 | } | |
1523 | } |