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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 AC |
28 | #include "channel.h" |
29 | #include "client.h" | |
30 | #include "common.h" | |
31 | #include "hash.h" | |
32 | #include "hook.h" | |
4562c604 | 33 | #include "match.h" |
212380e3 AC |
34 | #include "ircd.h" |
35 | #include "numeric.h" | |
36 | #include "s_serv.h" /* captab */ | |
37 | #include "s_user.h" | |
38 | #include "send.h" | |
39 | #include "whowas.h" | |
40 | #include "s_conf.h" /* ConfigFileEntry, ConfigChannel */ | |
41 | #include "s_newconf.h" | |
4016731b | 42 | #include "logger.h" |
212380e3 | 43 | |
18e4d421 | 44 | struct config_channel_entry ConfigChannel; |
c3d10343 | 45 | rb_dlink_list global_channel_list; |
b617afdc VY |
46 | static rb_bh *channel_heap; |
47 | static rb_bh *ban_heap; | |
48 | static rb_bh *topic_heap; | |
49 | static rb_bh *member_heap; | |
50 | ||
212380e3 AC |
51 | static int channel_capabs[] = { CAP_EX, CAP_IE, |
52 | CAP_SERVICE, | |
53 | CAP_TS6 | |
54 | }; | |
55 | ||
56 | #define NCHCAPS (sizeof(channel_capabs)/sizeof(int)) | |
57 | #define NCHCAP_COMBOS (1 << NCHCAPS) | |
58 | ||
59 | static struct ChCapCombo chcap_combos[NCHCAP_COMBOS]; | |
60 | ||
61 | static void free_topic(struct Channel *chptr); | |
62 | ||
63 | static int h_can_join; | |
64 | ||
65 | /* init_channels() | |
66 | * | |
67 | * input - | |
68 | * output - | |
69 | * side effects - initialises the various blockheaps | |
70 | */ | |
71 | void | |
72 | init_channels(void) | |
73 | { | |
c608a061 AC |
74 | channel_heap = rb_bh_create(sizeof(struct Channel), CHANNEL_HEAP_SIZE, "channel_heap"); |
75 | ban_heap = rb_bh_create(sizeof(struct Ban), BAN_HEAP_SIZE, "ban_heap"); | |
76 | topic_heap = rb_bh_create(TOPICLEN + 1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE, "topic_heap"); | |
77 | member_heap = rb_bh_create(sizeof(struct membership), MEMBER_HEAP_SIZE, "member_heap"); | |
212380e3 AC |
78 | |
79 | h_can_join = register_hook("can_join"); | |
80 | } | |
81 | ||
82 | /* | |
83 | * allocate_channel - Allocates a channel | |
84 | */ | |
85 | struct Channel * | |
86 | allocate_channel(const char *chname) | |
87 | { | |
88 | struct Channel *chptr; | |
398b6a73 | 89 | chptr = rb_bh_alloc(channel_heap); |
47a03750 | 90 | chptr->chname = rb_strdup(chname); |
212380e3 AC |
91 | return (chptr); |
92 | } | |
93 | ||
94 | void | |
95 | free_channel(struct Channel *chptr) | |
96 | { | |
637c4932 | 97 | rb_free(chptr->chname); |
398b6a73 | 98 | rb_bh_free(channel_heap, chptr); |
212380e3 AC |
99 | } |
100 | ||
101 | struct Ban * | |
102 | allocate_ban(const char *banstr, const char *who) | |
103 | { | |
104 | struct Ban *bptr; | |
398b6a73 | 105 | bptr = rb_bh_alloc(ban_heap); |
47a03750 VY |
106 | bptr->banstr = rb_strdup(banstr); |
107 | bptr->who = rb_strdup(who); | |
212380e3 AC |
108 | |
109 | return (bptr); | |
110 | } | |
111 | ||
112 | void | |
113 | free_ban(struct Ban *bptr) | |
114 | { | |
637c4932 VY |
115 | rb_free(bptr->banstr); |
116 | rb_free(bptr->who); | |
398b6a73 | 117 | rb_bh_free(ban_heap, bptr); |
212380e3 AC |
118 | } |
119 | ||
120 | ||
121 | /* find_channel_membership() | |
122 | * | |
123 | * input - channel to find them in, client to find | |
124 | * output - membership of client in channel, else NULL | |
125 | * side effects - | |
126 | */ | |
127 | struct membership * | |
128 | find_channel_membership(struct Channel *chptr, struct Client *client_p) | |
129 | { | |
130 | struct membership *msptr; | |
330fc5c1 | 131 | rb_dlink_node *ptr; |
212380e3 AC |
132 | |
133 | if(!IsClient(client_p)) | |
134 | return NULL; | |
135 | ||
136 | /* Pick the most efficient list to use to be nice to things like | |
137 | * CHANSERV which could be in a large number of channels | |
138 | */ | |
330fc5c1 | 139 | if(rb_dlink_list_length(&chptr->members) < rb_dlink_list_length(&client_p->user->channel)) |
212380e3 | 140 | { |
5cefa1d6 | 141 | RB_DLINK_FOREACH(ptr, chptr->members.head) |
212380e3 AC |
142 | { |
143 | msptr = ptr->data; | |
144 | ||
145 | if(msptr->client_p == client_p) | |
146 | return msptr; | |
147 | } | |
148 | } | |
149 | else | |
150 | { | |
5cefa1d6 | 151 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) |
212380e3 AC |
152 | { |
153 | msptr = ptr->data; | |
154 | ||
155 | if(msptr->chptr == chptr) | |
156 | return msptr; | |
157 | } | |
158 | } | |
159 | ||
160 | return NULL; | |
161 | } | |
162 | ||
163 | /* find_channel_status() | |
164 | * | |
165 | * input - membership to get status for, whether we can combine flags | |
166 | * output - flags of user on channel | |
167 | * side effects - | |
168 | */ | |
169 | const char * | |
170 | find_channel_status(struct membership *msptr, int combine) | |
171 | { | |
172 | static char buffer[3]; | |
173 | char *p; | |
174 | ||
175 | p = buffer; | |
176 | ||
177 | if(is_chanop(msptr)) | |
178 | { | |
179 | if(!combine) | |
180 | return "@"; | |
181 | *p++ = '@'; | |
182 | } | |
183 | ||
184 | if(is_voiced(msptr)) | |
185 | *p++ = '+'; | |
186 | ||
187 | *p = '\0'; | |
188 | return buffer; | |
189 | } | |
190 | ||
191 | /* add_user_to_channel() | |
192 | * | |
193 | * input - channel to add client to, client to add, channel flags | |
194 | * output - | |
195 | * side effects - user is added to channel | |
196 | */ | |
197 | void | |
198 | add_user_to_channel(struct Channel *chptr, struct Client *client_p, int flags) | |
199 | { | |
200 | struct membership *msptr; | |
201 | ||
202 | s_assert(client_p->user != NULL); | |
203 | if(client_p->user == NULL) | |
204 | return; | |
205 | ||
398b6a73 | 206 | msptr = rb_bh_alloc(member_heap); |
212380e3 AC |
207 | |
208 | msptr->chptr = chptr; | |
209 | msptr->client_p = client_p; | |
210 | msptr->flags = flags; | |
211 | ||
330fc5c1 AC |
212 | rb_dlinkAdd(msptr, &msptr->usernode, &client_p->user->channel); |
213 | rb_dlinkAdd(msptr, &msptr->channode, &chptr->members); | |
212380e3 AC |
214 | |
215 | if(MyClient(client_p)) | |
330fc5c1 | 216 | rb_dlinkAdd(msptr, &msptr->locchannode, &chptr->locmembers); |
212380e3 AC |
217 | } |
218 | ||
219 | /* remove_user_from_channel() | |
220 | * | |
221 | * input - membership pointer to remove from channel | |
222 | * output - | |
223 | * side effects - membership (thus user) is removed from channel | |
224 | */ | |
225 | void | |
226 | remove_user_from_channel(struct membership *msptr) | |
227 | { | |
228 | struct Client *client_p; | |
229 | struct Channel *chptr; | |
230 | s_assert(msptr != NULL); | |
231 | if(msptr == NULL) | |
232 | return; | |
233 | ||
234 | client_p = msptr->client_p; | |
235 | chptr = msptr->chptr; | |
236 | ||
330fc5c1 AC |
237 | rb_dlinkDelete(&msptr->usernode, &client_p->user->channel); |
238 | rb_dlinkDelete(&msptr->channode, &chptr->members); | |
212380e3 AC |
239 | |
240 | if(client_p->servptr == &me) | |
330fc5c1 | 241 | rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers); |
212380e3 | 242 | |
330fc5c1 | 243 | if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0) |
212380e3 AC |
244 | destroy_channel(chptr); |
245 | ||
398b6a73 | 246 | rb_bh_free(member_heap, msptr); |
212380e3 AC |
247 | |
248 | return; | |
249 | } | |
250 | ||
251 | /* remove_user_from_channels() | |
252 | * | |
253 | * input - user to remove from all channels | |
254 | * output - | |
255 | * side effects - user is removed from all channels | |
256 | */ | |
257 | void | |
258 | remove_user_from_channels(struct Client *client_p) | |
259 | { | |
260 | struct Channel *chptr; | |
261 | struct membership *msptr; | |
330fc5c1 | 262 | rb_dlink_node *ptr; |
637c4932 | 263 | rb_dlink_node *next_ptr; |
212380e3 AC |
264 | |
265 | if(client_p == NULL) | |
266 | return; | |
267 | ||
637c4932 | 268 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->user->channel.head) |
212380e3 AC |
269 | { |
270 | msptr = ptr->data; | |
271 | chptr = msptr->chptr; | |
272 | ||
330fc5c1 | 273 | rb_dlinkDelete(&msptr->channode, &chptr->members); |
212380e3 AC |
274 | |
275 | if(client_p->servptr == &me) | |
330fc5c1 | 276 | rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers); |
212380e3 | 277 | |
330fc5c1 | 278 | if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0) |
212380e3 AC |
279 | destroy_channel(chptr); |
280 | ||
398b6a73 | 281 | rb_bh_free(member_heap, msptr); |
212380e3 AC |
282 | } |
283 | ||
284 | client_p->user->channel.head = client_p->user->channel.tail = NULL; | |
285 | client_p->user->channel.length = 0; | |
286 | } | |
287 | ||
288 | /* invalidate_bancache_user() | |
289 | * | |
290 | * input - user to invalidate ban cache for | |
291 | * output - | |
292 | * side effects - ban cache is invalidated for all memberships of that user | |
293 | * to be used after a nick change | |
294 | */ | |
295 | void | |
296 | invalidate_bancache_user(struct Client *client_p) | |
297 | { | |
298 | struct membership *msptr; | |
330fc5c1 | 299 | rb_dlink_node *ptr; |
212380e3 AC |
300 | |
301 | if(client_p == NULL) | |
302 | return; | |
303 | ||
5cefa1d6 | 304 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) |
212380e3 AC |
305 | { |
306 | msptr = ptr->data; | |
307 | msptr->bants = 0; | |
308 | msptr->flags &= ~CHFL_BANNED; | |
309 | } | |
310 | } | |
311 | ||
312 | /* check_channel_name() | |
313 | * | |
314 | * input - channel name | |
315 | * output - 1 if valid channel name, else 0 | |
316 | * side effects - | |
317 | */ | |
318 | int | |
319 | check_channel_name(const char *name) | |
320 | { | |
321 | s_assert(name != NULL); | |
322 | if(name == NULL) | |
323 | return 0; | |
324 | ||
325 | for (; *name; ++name) | |
326 | { | |
327 | if(!IsChanChar(*name)) | |
328 | return 0; | |
329 | } | |
330 | ||
331 | return 1; | |
332 | } | |
333 | ||
334 | /* free_channel_list() | |
335 | * | |
330fc5c1 | 336 | * input - rb_dlink list to free |
212380e3 AC |
337 | * output - |
338 | * side effects - list of b/e/I modes is cleared | |
339 | */ | |
340 | void | |
330fc5c1 | 341 | free_channel_list(rb_dlink_list * list) |
212380e3 | 342 | { |
330fc5c1 | 343 | rb_dlink_node *ptr; |
637c4932 | 344 | rb_dlink_node *next_ptr; |
212380e3 AC |
345 | struct Ban *actualBan; |
346 | ||
637c4932 | 347 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head) |
212380e3 AC |
348 | { |
349 | actualBan = ptr->data; | |
350 | free_ban(actualBan); | |
351 | } | |
352 | ||
353 | list->head = list->tail = NULL; | |
354 | list->length = 0; | |
355 | } | |
356 | ||
357 | /* destroy_channel() | |
358 | * | |
359 | * input - channel to destroy | |
360 | * output - | |
361 | * side effects - channel is obliterated | |
362 | */ | |
363 | void | |
364 | destroy_channel(struct Channel *chptr) | |
365 | { | |
637c4932 | 366 | rb_dlink_node *ptr, *next_ptr; |
212380e3 | 367 | |
637c4932 | 368 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head) |
212380e3 AC |
369 | { |
370 | del_invite(chptr, ptr->data); | |
371 | } | |
372 | ||
373 | /* free all bans/exceptions/denies */ | |
374 | free_channel_list(&chptr->banlist); | |
375 | free_channel_list(&chptr->exceptlist); | |
376 | free_channel_list(&chptr->invexlist); | |
fea1ad52 | 377 | free_channel_list(&chptr->quietlist); |
212380e3 AC |
378 | |
379 | /* Free the topic */ | |
380 | free_topic(chptr); | |
381 | ||
330fc5c1 | 382 | rb_dlinkDelete(&chptr->node, &global_channel_list); |
212380e3 AC |
383 | del_from_channel_hash(chptr->chname, chptr); |
384 | free_channel(chptr); | |
385 | } | |
386 | ||
387 | /* channel_pub_or_secret() | |
388 | * | |
389 | * input - channel | |
390 | * output - "=" if public, "@" if secret, else "*" | |
391 | * side effects - | |
392 | */ | |
393 | static const char * | |
394 | channel_pub_or_secret(struct Channel *chptr) | |
395 | { | |
396 | if(PubChannel(chptr)) | |
397 | return ("="); | |
398 | else if(SecretChannel(chptr)) | |
399 | return ("@"); | |
400 | return ("*"); | |
401 | } | |
402 | ||
403 | /* channel_member_names() | |
404 | * | |
405 | * input - channel to list, client to list to, show endofnames | |
406 | * output - | |
407 | * side effects - client is given list of users on channel | |
408 | */ | |
409 | void | |
410 | channel_member_names(struct Channel *chptr, struct Client *client_p, int show_eon) | |
411 | { | |
412 | struct membership *msptr; | |
413 | struct Client *target_p; | |
330fc5c1 | 414 | rb_dlink_node *ptr; |
212380e3 AC |
415 | char lbuf[BUFSIZE]; |
416 | char *t; | |
417 | int mlen; | |
418 | int tlen; | |
419 | int cur_len; | |
420 | int is_member; | |
421 | int stack = IsCapable(client_p, CLICAP_MULTI_PREFIX); | |
422 | ||
423 | if(ShowChannel(client_p, chptr)) | |
424 | { | |
425 | is_member = IsMember(client_p, chptr); | |
426 | ||
b2f0da88 | 427 | cur_len = mlen = rb_sprintf(lbuf, form_str(RPL_NAMREPLY), |
212380e3 AC |
428 | me.name, client_p->name, |
429 | channel_pub_or_secret(chptr), chptr->chname); | |
430 | ||
431 | t = lbuf + cur_len; | |
432 | ||
5cefa1d6 | 433 | RB_DLINK_FOREACH(ptr, chptr->members.head) |
212380e3 AC |
434 | { |
435 | msptr = ptr->data; | |
436 | target_p = msptr->client_p; | |
437 | ||
438 | if(IsInvisible(target_p) && !is_member) | |
439 | continue; | |
440 | ||
441 | /* space, possible "@+" prefix */ | |
442 | if(cur_len + strlen(target_p->name) + 3 >= BUFSIZE - 3) | |
443 | { | |
444 | *(t - 1) = '\0'; | |
445 | sendto_one(client_p, "%s", lbuf); | |
446 | cur_len = mlen; | |
447 | t = lbuf + mlen; | |
448 | } | |
449 | ||
b2f0da88 | 450 | tlen = rb_sprintf(t, "%s%s ", find_channel_status(msptr, stack), |
212380e3 AC |
451 | target_p->name); |
452 | ||
453 | cur_len += tlen; | |
454 | t += tlen; | |
455 | } | |
456 | ||
457 | /* The old behaviour here was to always output our buffer, | |
458 | * even if there are no clients we can show. This happens | |
459 | * when a client does "NAMES" with no parameters, and all | |
460 | * the clients on a -sp channel are +i. I dont see a good | |
461 | * reason for keeping that behaviour, as it just wastes | |
462 | * bandwidth. --anfl | |
463 | */ | |
464 | if(cur_len != mlen) | |
465 | { | |
466 | *(t - 1) = '\0'; | |
467 | sendto_one(client_p, "%s", lbuf); | |
468 | } | |
469 | } | |
470 | ||
471 | if(show_eon) | |
472 | sendto_one(client_p, form_str(RPL_ENDOFNAMES), | |
473 | me.name, client_p->name, chptr->chname); | |
474 | } | |
475 | ||
476 | /* del_invite() | |
477 | * | |
478 | * input - channel to remove invite from, client to remove | |
479 | * output - | |
480 | * side effects - user is removed from invite list, if exists | |
481 | */ | |
482 | void | |
483 | del_invite(struct Channel *chptr, struct Client *who) | |
484 | { | |
330fc5c1 AC |
485 | rb_dlinkFindDestroy(who, &chptr->invites); |
486 | rb_dlinkFindDestroy(chptr, &who->user->invited); | |
212380e3 AC |
487 | } |
488 | ||
489 | /* is_banned() | |
490 | * | |
491 | * input - channel to check bans for, user to check bans against | |
492 | * optional prebuilt buffers | |
493 | * output - 1 if banned, else 0 | |
494 | * side effects - | |
495 | */ | |
496 | int | |
497 | is_banned(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
498 | const char *s, const char *s2) | |
499 | { | |
500 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
501 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
502 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
503 | char *s3 = NULL; | |
330fc5c1 | 504 | rb_dlink_node *ptr; |
212380e3 AC |
505 | struct Ban *actualBan = NULL; |
506 | struct Ban *actualExcept = NULL; | |
507 | ||
508 | if(!MyClient(who)) | |
509 | return 0; | |
510 | ||
511 | /* if the buffers havent been built, do it here */ | |
512 | if(s == NULL) | |
513 | { | |
b2f0da88 AC |
514 | rb_sprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); |
515 | rb_sprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
212380e3 AC |
516 | |
517 | s = src_host; | |
518 | s2 = src_iphost; | |
519 | } | |
520 | if(who->localClient->mangledhost != NULL) | |
521 | { | |
522 | /* if host mangling mode enabled, also check their real host */ | |
523 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
524 | { | |
b2f0da88 | 525 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); |
212380e3 AC |
526 | s3 = src_althost; |
527 | } | |
528 | /* if host mangling mode not enabled and no other spoof, | |
529 | * also check the mangled form of their host */ | |
530 | else if (!IsDynSpoof(who)) | |
531 | { | |
b2f0da88 | 532 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); |
212380e3 AC |
533 | s3 = src_althost; |
534 | } | |
535 | } | |
536 | ||
5cefa1d6 | 537 | RB_DLINK_FOREACH(ptr, chptr->banlist.head) |
212380e3 AC |
538 | { |
539 | actualBan = ptr->data; | |
540 | if(match(actualBan->banstr, s) || | |
541 | match(actualBan->banstr, s2) || | |
542 | match_cidr(actualBan->banstr, s2) || | |
543 | match_extban(actualBan->banstr, who, chptr, CHFL_BAN) || | |
544 | (s3 != NULL && match(actualBan->banstr, s3))) | |
545 | break; | |
546 | else | |
547 | actualBan = NULL; | |
548 | } | |
549 | ||
550 | if((actualBan != NULL) && ConfigChannel.use_except) | |
551 | { | |
5cefa1d6 | 552 | RB_DLINK_FOREACH(ptr, chptr->exceptlist.head) |
212380e3 AC |
553 | { |
554 | actualExcept = ptr->data; | |
555 | ||
556 | /* theyre exempted.. */ | |
557 | if(match(actualExcept->banstr, s) || | |
558 | match(actualExcept->banstr, s2) || | |
559 | match_cidr(actualExcept->banstr, s2) || | |
560 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
561 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
562 | { | |
563 | /* cache the fact theyre not banned */ | |
564 | if(msptr != NULL) | |
565 | { | |
566 | msptr->bants = chptr->bants; | |
567 | msptr->flags &= ~CHFL_BANNED; | |
568 | } | |
569 | ||
570 | return CHFL_EXCEPTION; | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
575 | /* cache the banned/not banned status */ | |
576 | if(msptr != NULL) | |
577 | { | |
578 | msptr->bants = chptr->bants; | |
579 | ||
580 | if(actualBan != NULL) | |
581 | { | |
582 | msptr->flags |= CHFL_BANNED; | |
583 | return CHFL_BAN; | |
584 | } | |
585 | else | |
586 | { | |
587 | msptr->flags &= ~CHFL_BANNED; | |
588 | return 0; | |
589 | } | |
590 | } | |
591 | ||
592 | return ((actualBan ? CHFL_BAN : 0)); | |
593 | } | |
594 | ||
595 | /* is_quieted() | |
596 | * | |
597 | * input - channel to check bans for, user to check bans against | |
598 | * optional prebuilt buffers | |
599 | * output - 1 if banned, else 0 | |
600 | * side effects - | |
601 | */ | |
602 | int | |
603 | is_quieted(struct Channel *chptr, struct Client *who, struct membership *msptr, | |
604 | const char *s, const char *s2) | |
605 | { | |
606 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
607 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
608 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
609 | char *s3 = NULL; | |
330fc5c1 | 610 | rb_dlink_node *ptr; |
212380e3 AC |
611 | struct Ban *actualBan = NULL; |
612 | struct Ban *actualExcept = NULL; | |
613 | ||
614 | if(!MyClient(who)) | |
615 | return 0; | |
616 | ||
617 | /* if the buffers havent been built, do it here */ | |
618 | if(s == NULL) | |
619 | { | |
b2f0da88 AC |
620 | rb_sprintf(src_host, "%s!%s@%s", who->name, who->username, who->host); |
621 | rb_sprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost); | |
212380e3 AC |
622 | |
623 | s = src_host; | |
624 | s2 = src_iphost; | |
625 | } | |
626 | if(who->localClient->mangledhost != NULL) | |
627 | { | |
628 | /* if host mangling mode enabled, also check their real host */ | |
629 | if(!strcmp(who->host, who->localClient->mangledhost)) | |
630 | { | |
b2f0da88 | 631 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost); |
212380e3 AC |
632 | s3 = src_althost; |
633 | } | |
634 | /* if host mangling mode not enabled and no other spoof, | |
635 | * also check the mangled form of their host */ | |
636 | else if (!IsDynSpoof(who)) | |
637 | { | |
b2f0da88 | 638 | rb_sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost); |
212380e3 AC |
639 | s3 = src_althost; |
640 | } | |
641 | } | |
642 | ||
5cefa1d6 | 643 | RB_DLINK_FOREACH(ptr, chptr->quietlist.head) |
212380e3 AC |
644 | { |
645 | actualBan = ptr->data; | |
646 | if(match(actualBan->banstr, s) || | |
647 | match(actualBan->banstr, s2) || | |
648 | match_cidr(actualBan->banstr, s2) || | |
649 | match_extban(actualBan->banstr, who, chptr, CHFL_QUIET) || | |
650 | (s3 != NULL && match(actualBan->banstr, s3))) | |
651 | break; | |
652 | else | |
653 | actualBan = NULL; | |
654 | } | |
655 | ||
656 | if((actualBan != NULL) && ConfigChannel.use_except) | |
657 | { | |
5cefa1d6 | 658 | RB_DLINK_FOREACH(ptr, chptr->exceptlist.head) |
212380e3 AC |
659 | { |
660 | actualExcept = ptr->data; | |
661 | ||
662 | /* theyre exempted.. */ | |
663 | if(match(actualExcept->banstr, s) || | |
664 | match(actualExcept->banstr, s2) || | |
665 | match_cidr(actualExcept->banstr, s2) || | |
666 | match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) || | |
667 | (s3 != NULL && match(actualExcept->banstr, s3))) | |
668 | { | |
669 | /* cache the fact theyre not banned */ | |
670 | if(msptr != NULL) | |
671 | { | |
672 | msptr->bants = chptr->bants; | |
673 | msptr->flags &= ~CHFL_BANNED; | |
674 | } | |
675 | ||
676 | return CHFL_EXCEPTION; | |
677 | } | |
678 | } | |
679 | } | |
680 | ||
681 | /* cache the banned/not banned status */ | |
682 | if(msptr != NULL) | |
683 | { | |
684 | msptr->bants = chptr->bants; | |
685 | ||
686 | if(actualBan != NULL) | |
687 | { | |
688 | msptr->flags |= CHFL_BANNED; | |
689 | return CHFL_BAN; | |
690 | } | |
691 | else | |
692 | { | |
693 | msptr->flags &= ~CHFL_BANNED; | |
694 | return 0; | |
695 | } | |
696 | } | |
697 | ||
698 | return ((actualBan ? CHFL_BAN : 0)); | |
699 | } | |
700 | ||
701 | /* can_join() | |
702 | * | |
703 | * input - client to check, channel to check for, key | |
704 | * output - reason for not being able to join, else 0 | |
705 | * side effects - | |
706 | */ | |
707 | int | |
708 | can_join(struct Client *source_p, struct Channel *chptr, char *key) | |
709 | { | |
330fc5c1 AC |
710 | rb_dlink_node *invite = NULL; |
711 | rb_dlink_node *ptr; | |
212380e3 AC |
712 | struct Ban *invex = NULL; |
713 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; | |
714 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
715 | char src_althost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
716 | int use_althost = 0; | |
1ebf4db4 | 717 | int i = 0; |
212380e3 AC |
718 | hook_data_channel moduledata; |
719 | ||
720 | s_assert(source_p->localClient != NULL); | |
721 | ||
b2f0da88 AC |
722 | rb_sprintf(src_host, "%s!%s@%s", source_p->name, source_p->username, source_p->host); |
723 | rb_sprintf(src_iphost, "%s!%s@%s", source_p->name, source_p->username, source_p->sockhost); | |
212380e3 AC |
724 | if(source_p->localClient->mangledhost != NULL) |
725 | { | |
726 | /* if host mangling mode enabled, also check their real host */ | |
727 | if(!strcmp(source_p->host, source_p->localClient->mangledhost)) | |
728 | { | |
b2f0da88 | 729 | rb_sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->orighost); |
212380e3 AC |
730 | use_althost = 1; |
731 | } | |
732 | /* if host mangling mode not enabled and no other spoof, | |
733 | * also check the mangled form of their host */ | |
734 | else if (!IsDynSpoof(source_p)) | |
735 | { | |
b2f0da88 | 736 | rb_sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->localClient->mangledhost); |
212380e3 AC |
737 | use_althost = 1; |
738 | } | |
739 | } | |
740 | ||
741 | if((is_banned(chptr, source_p, NULL, src_host, src_iphost)) == CHFL_BAN) | |
742 | return (ERR_BANNEDFROMCHAN); | |
743 | ||
744 | if(chptr->mode.mode & MODE_INVITEONLY) | |
745 | { | |
5cefa1d6 | 746 | RB_DLINK_FOREACH(invite, source_p->user->invited.head) |
212380e3 | 747 | { |
1ebf4db4 | 748 | if(invite->data == chptr) |
212380e3 AC |
749 | break; |
750 | } | |
1ebf4db4 | 751 | if(invite == NULL) |
212380e3 AC |
752 | { |
753 | if(!ConfigChannel.use_invex) | |
754 | return (ERR_INVITEONLYCHAN); | |
5cefa1d6 | 755 | RB_DLINK_FOREACH(ptr, chptr->invexlist.head) |
212380e3 AC |
756 | { |
757 | invex = ptr->data; | |
758 | if(match(invex->banstr, src_host) | |
759 | || match(invex->banstr, src_iphost) | |
760 | || match_cidr(invex->banstr, src_iphost) | |
761 | || match_extban(invex->banstr, source_p, chptr, CHFL_INVEX) | |
762 | || (use_althost && match(invex->banstr, src_althost))) | |
763 | break; | |
764 | } | |
765 | if(ptr == NULL) | |
766 | return (ERR_INVITEONLYCHAN); | |
767 | } | |
768 | } | |
769 | ||
770 | if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key))) | |
771 | return (ERR_BADCHANNELKEY); | |
772 | ||
773 | if(chptr->mode.limit && | |
330fc5c1 | 774 | rb_dlink_list_length(&chptr->members) >= (unsigned long) chptr->mode.limit) |
1ebf4db4 | 775 | i = ERR_CHANNELISFULL; |
212380e3 | 776 | if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser)) |
1ebf4db4 | 777 | i = ERR_NEEDREGGEDNICK; |
212380e3 | 778 | /* join throttling stuff --nenolod */ |
1ebf4db4 | 779 | else if(chptr->mode.join_num > 0 && chptr->mode.join_time > 0) |
212380e3 | 780 | { |
e3354945 | 781 | if ((rb_current_time() - chptr->join_delta <= |
212380e3 AC |
782 | chptr->mode.join_time) && (chptr->join_count >= |
783 | chptr->mode.join_num)) | |
1ebf4db4 JT |
784 | i = ERR_THROTTLE; |
785 | } | |
786 | ||
787 | /* allow /invite to override +l/+r/+j also -- jilles */ | |
788 | if (i != 0 && invite == NULL) | |
789 | { | |
5cefa1d6 | 790 | RB_DLINK_FOREACH(invite, source_p->user->invited.head) |
1ebf4db4 JT |
791 | { |
792 | if(invite->data == chptr) | |
793 | break; | |
794 | } | |
795 | if (invite == NULL) | |
796 | return i; | |
212380e3 AC |
797 | } |
798 | ||
799 | moduledata.client = source_p; | |
800 | moduledata.chptr = chptr; | |
801 | moduledata.approved = 0; | |
802 | ||
803 | call_hook(h_can_join, &moduledata); | |
804 | ||
805 | return moduledata.approved; | |
806 | } | |
807 | ||
808 | /* can_send() | |
809 | * | |
810 | * input - user to check in channel, membership pointer | |
811 | * output - whether can explicitly send or not, else CAN_SEND_NONOP | |
812 | * side effects - | |
813 | */ | |
814 | int | |
815 | can_send(struct Channel *chptr, struct Client *source_p, struct membership *msptr) | |
816 | { | |
817 | if(IsServer(source_p) || IsService(source_p)) | |
818 | return CAN_SEND_OPV; | |
819 | ||
820 | if(MyClient(source_p) && hash_find_resv(chptr->chname) && | |
821 | !IsOper(source_p) && !IsExemptResv(source_p)) | |
822 | return CAN_SEND_NO; | |
823 | ||
824 | if(msptr == NULL) | |
825 | { | |
826 | msptr = find_channel_membership(chptr, source_p); | |
827 | ||
828 | if(msptr == NULL) | |
829 | { | |
830 | /* if its +m or +n and theyre not in the channel, | |
831 | * they cant send. we dont check bans here because | |
832 | * theres no possibility of caching them --fl | |
833 | */ | |
834 | if(chptr->mode.mode & MODE_NOPRIVMSGS || chptr->mode.mode & MODE_MODERATED) | |
835 | return CAN_SEND_NO; | |
836 | else | |
837 | return CAN_SEND_NONOP; | |
838 | } | |
839 | } | |
840 | ||
841 | if(is_chanop_voiced(msptr)) | |
842 | return CAN_SEND_OPV; | |
843 | ||
844 | if(chptr->mode.mode & MODE_MODERATED) | |
845 | return CAN_SEND_NO; | |
846 | ||
847 | if(MyClient(source_p)) | |
848 | { | |
849 | /* cached can_send */ | |
850 | if(msptr->bants == chptr->bants) | |
851 | { | |
852 | if(can_send_banned(msptr)) | |
853 | return CAN_SEND_NO; | |
854 | } | |
855 | else if(is_banned(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN | |
856 | || is_quieted(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN) | |
857 | return CAN_SEND_NO; | |
858 | } | |
859 | ||
860 | return CAN_SEND_NONOP; | |
861 | } | |
862 | ||
863 | /* find_bannickchange_channel() | |
864 | * Input: client to check | |
865 | * Output: channel preventing nick change | |
866 | */ | |
867 | struct Channel * | |
868 | find_bannickchange_channel(struct Client *client_p) | |
869 | { | |
870 | struct Channel *chptr; | |
871 | struct membership *msptr; | |
330fc5c1 | 872 | rb_dlink_node *ptr; |
212380e3 AC |
873 | char src_host[NICKLEN + USERLEN + HOSTLEN + 6]; |
874 | char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6]; | |
875 | ||
876 | if (!MyClient(client_p)) | |
877 | return NULL; | |
878 | ||
b2f0da88 AC |
879 | rb_sprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host); |
880 | rb_sprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost); | |
212380e3 | 881 | |
5cefa1d6 | 882 | RB_DLINK_FOREACH(ptr, client_p->user->channel.head) |
212380e3 AC |
883 | { |
884 | msptr = ptr->data; | |
885 | chptr = msptr->chptr; | |
886 | if (is_chanop_voiced(msptr)) | |
887 | continue; | |
888 | /* cached can_send */ | |
889 | if (msptr->bants == chptr->bants) | |
890 | { | |
891 | if (can_send_banned(msptr)) | |
892 | return chptr; | |
893 | } | |
894 | else if (is_banned(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN | |
895 | || is_quieted(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN) | |
896 | return chptr; | |
897 | } | |
898 | return NULL; | |
899 | } | |
900 | ||
901 | /* void check_spambot_warning(struct Client *source_p) | |
902 | * Input: Client to check, channel name or NULL if this is a part. | |
903 | * Output: none | |
904 | * Side-effects: Updates the client's oper_warn_count_down, warns the | |
905 | * IRC operators if necessary, and updates join_leave_countdown as | |
906 | * needed. | |
907 | */ | |
908 | void | |
909 | check_spambot_warning(struct Client *source_p, const char *name) | |
910 | { | |
911 | int t_delta; | |
912 | int decrement_count; | |
913 | if((GlobalSetOptions.spam_num && | |
914 | (source_p->localClient->join_leave_count >= GlobalSetOptions.spam_num))) | |
915 | { | |
916 | if(source_p->localClient->oper_warn_count_down > 0) | |
917 | source_p->localClient->oper_warn_count_down--; | |
918 | else | |
919 | source_p->localClient->oper_warn_count_down = 0; | |
920 | if(source_p->localClient->oper_warn_count_down == 0) | |
921 | { | |
922 | /* Its already known as a possible spambot */ | |
923 | if(name != NULL) | |
f2c1b06b | 924 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, |
212380e3 AC |
925 | "User %s (%s@%s) trying to join %s is a possible spambot", |
926 | source_p->name, | |
63aecfb9 | 927 | source_p->username, source_p->orighost, name); |
212380e3 | 928 | else |
f2c1b06b | 929 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, |
212380e3 AC |
930 | "User %s (%s@%s) is a possible spambot", |
931 | source_p->name, | |
63aecfb9 | 932 | source_p->username, source_p->orighost); |
212380e3 AC |
933 | source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN; |
934 | } | |
935 | } | |
936 | else | |
937 | { | |
938 | if((t_delta = | |
e3354945 | 939 | (rb_current_time() - source_p->localClient->last_leave_time)) > |
212380e3 AC |
940 | JOIN_LEAVE_COUNT_EXPIRE_TIME) |
941 | { | |
942 | decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME); | |
943 | if(decrement_count > source_p->localClient->join_leave_count) | |
944 | source_p->localClient->join_leave_count = 0; | |
945 | else | |
946 | source_p->localClient->join_leave_count -= decrement_count; | |
947 | } | |
948 | else | |
949 | { | |
e3354945 | 950 | if((rb_current_time() - |
212380e3 AC |
951 | (source_p->localClient->last_join_time)) < GlobalSetOptions.spam_time) |
952 | { | |
953 | /* oh, its a possible spambot */ | |
954 | source_p->localClient->join_leave_count++; | |
955 | } | |
956 | } | |
957 | if(name != NULL) | |
e3354945 | 958 | source_p->localClient->last_join_time = rb_current_time(); |
212380e3 | 959 | else |
e3354945 | 960 | source_p->localClient->last_leave_time = rb_current_time(); |
212380e3 AC |
961 | } |
962 | } | |
963 | ||
964 | /* check_splitmode() | |
965 | * | |
966 | * input - | |
967 | * output - | |
968 | * side effects - compares usercount and servercount against their split | |
969 | * values and adjusts splitmode accordingly | |
970 | */ | |
971 | void | |
972 | check_splitmode(void *unused) | |
973 | { | |
974 | if(splitchecking && (ConfigChannel.no_join_on_split || ConfigChannel.no_create_on_split)) | |
975 | { | |
976 | /* not split, we're being asked to check now because someone | |
977 | * has left | |
978 | */ | |
979 | if(!splitmode) | |
980 | { | |
981 | if(eob_count < split_servers || Count.total < split_users) | |
982 | { | |
983 | splitmode = 1; | |
984 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
985 | "Network split, activating splitmode"); | |
c608a061 | 986 | check_splitmode_ev = rb_event_addish("check_splitmode", check_splitmode, NULL, 2); |
212380e3 AC |
987 | } |
988 | } | |
989 | /* in splitmode, check whether its finished */ | |
990 | else if(eob_count >= split_servers && Count.total >= split_users) | |
991 | { | |
992 | splitmode = 0; | |
993 | ||
994 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
995 | "Network rejoined, deactivating splitmode"); | |
996 | ||
c608a061 | 997 | rb_event_delete(check_splitmode_ev); |
6a309903 | 998 | check_splitmode_ev = NULL; |
212380e3 AC |
999 | } |
1000 | } | |
1001 | } | |
1002 | ||
1003 | ||
1004 | /* allocate_topic() | |
1005 | * | |
1006 | * input - channel to allocate topic for | |
1007 | * output - 1 on success, else 0 | |
1008 | * side effects - channel gets a topic allocated | |
1009 | */ | |
1010 | static void | |
1011 | allocate_topic(struct Channel *chptr) | |
1012 | { | |
1013 | void *ptr; | |
1014 | ||
1015 | if(chptr == NULL) | |
1016 | return; | |
1017 | ||
398b6a73 | 1018 | ptr = rb_bh_alloc(topic_heap); |
212380e3 AC |
1019 | |
1020 | /* Basically we allocate one large block for the topic and | |
1021 | * the topic info. We then split it up into two and shove it | |
1022 | * in the chptr | |
1023 | */ | |
1024 | chptr->topic = ptr; | |
1025 | chptr->topic_info = (char *) ptr + TOPICLEN + 1; | |
1026 | *chptr->topic = '\0'; | |
1027 | *chptr->topic_info = '\0'; | |
1028 | } | |
1029 | ||
1030 | /* free_topic() | |
1031 | * | |
1032 | * input - channel which has topic to free | |
1033 | * output - | |
1034 | * side effects - channels topic is free'd | |
1035 | */ | |
1036 | static void | |
1037 | free_topic(struct Channel *chptr) | |
1038 | { | |
1039 | void *ptr; | |
1040 | ||
1041 | if(chptr == NULL || chptr->topic == NULL) | |
1042 | return; | |
1043 | ||
1044 | /* This is safe for now - If you change allocate_topic you | |
1045 | * MUST change this as well | |
1046 | */ | |
1047 | ptr = chptr->topic; | |
398b6a73 | 1048 | rb_bh_free(topic_heap, ptr); |
212380e3 AC |
1049 | chptr->topic = NULL; |
1050 | chptr->topic_info = NULL; | |
1051 | } | |
1052 | ||
1053 | /* set_channel_topic() | |
1054 | * | |
1055 | * input - channel, topic to set, topic info and topic ts | |
1056 | * output - | |
1057 | * side effects - channels topic, topic info and TS are set. | |
1058 | */ | |
1059 | void | |
1060 | set_channel_topic(struct Channel *chptr, const char *topic, const char *topic_info, time_t topicts) | |
1061 | { | |
1062 | if(strlen(topic) > 0) | |
1063 | { | |
1064 | if(chptr->topic == NULL) | |
1065 | allocate_topic(chptr); | |
f427c8b0 VY |
1066 | rb_strlcpy(chptr->topic, topic, TOPICLEN + 1); |
1067 | rb_strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN); | |
212380e3 AC |
1068 | chptr->topic_time = topicts; |
1069 | } | |
1070 | else | |
1071 | { | |
1072 | if(chptr->topic != NULL) | |
1073 | free_topic(chptr); | |
1074 | chptr->topic_time = 0; | |
1075 | } | |
1076 | } | |
1077 | ||
212380e3 AC |
1078 | /* channel_modes() |
1079 | * | |
1080 | * inputs - pointer to channel | |
1081 | * - pointer to client | |
f1e35c19 JT |
1082 | * output - string with simple modes |
1083 | * side effects - result from previous calls overwritten | |
212380e3 AC |
1084 | * |
1085 | * Stolen from ShadowIRCd 4 --nenolod | |
1086 | */ | |
1087 | const char * | |
1088 | channel_modes(struct Channel *chptr, struct Client *client_p) | |
1089 | { | |
1090 | int i; | |
1091 | char buf1[BUFSIZE]; | |
1092 | char buf2[BUFSIZE]; | |
1093 | static char final[BUFSIZE]; | |
1094 | char *mbuf = buf1; | |
1095 | char *pbuf = buf2; | |
1096 | ||
1097 | *mbuf++ = '+'; | |
1098 | *pbuf = '\0'; | |
1099 | ||
efccc22c VY |
1100 | for (i = 0; i < 256; i++) |
1101 | if(chptr->mode.mode & chmode_flags[i]) | |
1102 | *mbuf++ = i; | |
212380e3 AC |
1103 | |
1104 | if(chptr->mode.limit) | |
1105 | { | |
1106 | *mbuf++ = 'l'; | |
1107 | ||
f1e35c19 | 1108 | if(!IsClient(client_p) || IsMember(client_p, chptr)) |
b2f0da88 | 1109 | pbuf += rb_sprintf(pbuf, " %d", chptr->mode.limit); |
212380e3 AC |
1110 | } |
1111 | ||
1112 | if(*chptr->mode.key) | |
1113 | { | |
1114 | *mbuf++ = 'k'; | |
1115 | ||
f1e35c19 | 1116 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) |
b2f0da88 | 1117 | pbuf += rb_sprintf(pbuf, " %s", chptr->mode.key); |
212380e3 AC |
1118 | } |
1119 | ||
1120 | if(chptr->mode.join_num) | |
1121 | { | |
1122 | *mbuf++ = 'j'; | |
1123 | ||
f1e35c19 | 1124 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) |
b2f0da88 | 1125 | pbuf += rb_sprintf(pbuf, " %d:%d", chptr->mode.join_num, |
212380e3 AC |
1126 | chptr->mode.join_time); |
1127 | } | |
1128 | ||
f1e35c19 | 1129 | if(*chptr->mode.forward && (ConfigChannel.use_forward || !IsClient(client_p))) |
212380e3 AC |
1130 | { |
1131 | *mbuf++ = 'f'; | |
1132 | ||
f1e35c19 | 1133 | if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr)) |
b2f0da88 | 1134 | pbuf += rb_sprintf(pbuf, " %s", chptr->mode.forward); |
212380e3 AC |
1135 | } |
1136 | ||
1137 | *mbuf = '\0'; | |
1138 | ||
f427c8b0 | 1139 | rb_strlcpy(final, buf1, sizeof final); |
1f9de103 | 1140 | rb_strlcat(final, buf2, sizeof final); |
212380e3 AC |
1141 | return final; |
1142 | } | |
1143 | ||
1144 | /* Now lets do some stuff to keep track of what combinations of | |
1145 | * servers exist... | |
1146 | * Note that the number of combinations doubles each time you add | |
1147 | * something to this list. Each one is only quick if no servers use that | |
1148 | * combination, but if the numbers get too high here MODE will get too | |
1149 | * slow. I suggest if you get more than 7 here, you consider getting rid | |
1150 | * of some and merging or something. If it wasn't for irc+cs we would | |
1151 | * probably not even need to bother about most of these, but unfortunately | |
1152 | * we do. -A1kmm | |
1153 | */ | |
1154 | ||
1155 | /* void init_chcap_usage_counts(void) | |
1156 | * | |
1157 | * Inputs - none | |
1158 | * Output - none | |
1159 | * Side-effects - Initialises the usage counts to zero. Fills in the | |
1160 | * chcap_yes and chcap_no combination tables. | |
1161 | */ | |
1162 | void | |
1163 | init_chcap_usage_counts(void) | |
1164 | { | |
1165 | unsigned long m, c, y, n; | |
1166 | ||
1167 | memset(chcap_combos, 0, sizeof(chcap_combos)); | |
1168 | ||
1169 | /* For every possible combination */ | |
1170 | for (m = 0; m < NCHCAP_COMBOS; m++) | |
1171 | { | |
1172 | /* Check each capab */ | |
1173 | for (c = y = n = 0; c < NCHCAPS; c++) | |
1174 | { | |
1175 | if((m & (1 << c)) == 0) | |
1176 | n |= channel_capabs[c]; | |
1177 | else | |
1178 | y |= channel_capabs[c]; | |
1179 | } | |
1180 | chcap_combos[m].cap_yes = y; | |
1181 | chcap_combos[m].cap_no = n; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1186 | * Input: serv_p; The client whose capabs to register. | |
1187 | * Output: none | |
1188 | * Side-effects: Increments the usage counts for the correct capab | |
1189 | * combination. | |
1190 | */ | |
1191 | void | |
1192 | set_chcap_usage_counts(struct Client *serv_p) | |
1193 | { | |
1194 | int n; | |
1195 | ||
1196 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1197 | { | |
1198 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1199 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1200 | { | |
1201 | chcap_combos[n].count++; | |
1202 | return; | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | /* This should be impossible -A1kmm. */ | |
1207 | s_assert(0); | |
1208 | } | |
1209 | ||
1210 | /* void set_chcap_usage_counts(struct Client *serv_p) | |
1211 | * | |
1212 | * Inputs - serv_p; The client whose capabs to register. | |
1213 | * Output - none | |
1214 | * Side-effects - Decrements the usage counts for the correct capab | |
1215 | * combination. | |
1216 | */ | |
1217 | void | |
1218 | unset_chcap_usage_counts(struct Client *serv_p) | |
1219 | { | |
1220 | int n; | |
1221 | ||
1222 | for (n = 0; n < NCHCAP_COMBOS; n++) | |
1223 | { | |
1224 | if(IsCapable(serv_p, chcap_combos[n].cap_yes) && | |
1225 | NotCapable(serv_p, chcap_combos[n].cap_no)) | |
1226 | { | |
1227 | /* Hopefully capabs can't change dynamically or anything... */ | |
1228 | s_assert(chcap_combos[n].count > 0); | |
1229 | ||
1230 | if(chcap_combos[n].count > 0) | |
1231 | chcap_combos[n].count--; | |
1232 | return; | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | /* This should be impossible -A1kmm. */ | |
1237 | s_assert(0); | |
1238 | } | |
1239 | ||
1240 | /* void send_cap_mode_changes(struct Client *client_p, | |
1241 | * struct Client *source_p, | |
1242 | * struct Channel *chptr, int cap, int nocap) | |
1243 | * Input: The client sending(client_p), the source client(source_p), | |
1244 | * the channel to send mode changes for(chptr) | |
1245 | * Output: None. | |
1246 | * Side-effects: Sends the appropriate mode changes to capable servers. | |
1247 | * | |
1248 | * Reverted back to my original design, except that we now keep a count | |
1249 | * of the number of servers which each combination as an optimisation, so | |
1250 | * the capabs combinations which are not needed are not worked out. -A1kmm | |
1251 | */ | |
1252 | void | |
1253 | send_cap_mode_changes(struct Client *client_p, struct Client *source_p, | |
1254 | struct Channel *chptr, struct ChModeChange mode_changes[], int mode_count) | |
1255 | { | |
1256 | static char modebuf[BUFSIZE]; | |
1257 | static char parabuf[BUFSIZE]; | |
1258 | int i, mbl, pbl, nc, mc, preflen, len; | |
1259 | char *pbuf; | |
1260 | const char *arg; | |
1261 | int dir; | |
1262 | int j; | |
1263 | int cap; | |
1264 | int nocap; | |
1265 | int arglen; | |
1266 | ||
1267 | /* Now send to servers... */ | |
1268 | for (j = 0; j < NCHCAP_COMBOS; j++) | |
1269 | { | |
1270 | if(chcap_combos[j].count == 0) | |
1271 | continue; | |
1272 | ||
1273 | mc = 0; | |
1274 | nc = 0; | |
1275 | pbl = 0; | |
1276 | parabuf[0] = 0; | |
1277 | pbuf = parabuf; | |
1278 | dir = MODE_QUERY; | |
1279 | ||
1280 | cap = chcap_combos[j].cap_yes; | |
1281 | nocap = chcap_combos[j].cap_no; | |
1282 | ||
469c9689 AC |
1283 | mbl = preflen = rb_sprintf(modebuf, ":%s TMODE %ld %s ", |
1284 | use_id(source_p), (long) chptr->channelts, | |
1285 | chptr->chname); | |
212380e3 AC |
1286 | |
1287 | /* loop the list of - modes we have */ | |
1288 | for (i = 0; i < mode_count; i++) | |
1289 | { | |
1290 | /* if they dont support the cap we need, or they do support a cap they | |
1291 | * cant have, then dont add it to the modebuf.. that way they wont see | |
1292 | * the mode | |
1293 | */ | |
1294 | if((mode_changes[i].letter == 0) || | |
1295 | ((cap & mode_changes[i].caps) != mode_changes[i].caps) | |
1296 | || ((nocap & mode_changes[i].nocaps) != mode_changes[i].nocaps)) | |
1297 | continue; | |
1298 | ||
fd44b851 JT |
1299 | if(!EmptyString(mode_changes[i].id)) |
1300 | arg = mode_changes[i].id; | |
1301 | else | |
1302 | arg = mode_changes[i].arg; | |
212380e3 AC |
1303 | |
1304 | if(arg) | |
1305 | { | |
1306 | arglen = strlen(arg); | |
1307 | ||
1308 | /* dont even think about it! --fl */ | |
1309 | if(arglen > MODEBUFLEN - 5) | |
1310 | continue; | |
1311 | } | |
1312 | ||
1313 | /* if we're creeping past the buf size, we need to send it and make | |
1314 | * another line for the other modes | |
1315 | * XXX - this could give away server topology with uids being | |
1316 | * different lengths, but not much we can do, except possibly break | |
1317 | * them as if they were the longest of the nick or uid at all times, | |
1318 | * which even then won't work as we don't always know the uid -A1kmm. | |
1319 | */ | |
1320 | if(arg && ((mc == MAXMODEPARAMSSERV) || | |
1321 | ((mbl + pbl + arglen + 4) > (BUFSIZE - 3)))) | |
1322 | { | |
1323 | if(nc != 0) | |
1324 | sendto_server(client_p, chptr, cap, nocap, | |
1325 | "%s %s", modebuf, parabuf); | |
1326 | nc = 0; | |
1327 | mc = 0; | |
1328 | ||
1329 | mbl = preflen; | |
1330 | pbl = 0; | |
1331 | pbuf = parabuf; | |
1332 | parabuf[0] = 0; | |
1333 | dir = MODE_QUERY; | |
1334 | } | |
1335 | ||
1336 | if(dir != mode_changes[i].dir) | |
1337 | { | |
1338 | modebuf[mbl++] = (mode_changes[i].dir == MODE_ADD) ? '+' : '-'; | |
1339 | dir = mode_changes[i].dir; | |
1340 | } | |
1341 | ||
1342 | modebuf[mbl++] = mode_changes[i].letter; | |
1343 | modebuf[mbl] = 0; | |
1344 | nc++; | |
1345 | ||
1346 | if(arg != NULL) | |
1347 | { | |
b2f0da88 | 1348 | len = rb_sprintf(pbuf, "%s ", arg); |
212380e3 AC |
1349 | pbuf += len; |
1350 | pbl += len; | |
1351 | mc++; | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | if(pbl && parabuf[pbl - 1] == ' ') | |
1356 | parabuf[pbl - 1] = 0; | |
1357 | ||
1358 | if(nc != 0) | |
1359 | sendto_server(client_p, chptr, cap, nocap, "%s %s", modebuf, parabuf); | |
1360 | } | |
1361 | } |