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Update comments for parv[0] removal.
[irc/rqf/shadowircd.git] / modules / core / m_join.c
1 /*
2 * ircd-ratbox: A slightly useful ircd.
3 * m_join.c: Joins a channel.
4 *
5 * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
6 * Copyright (C) 1996-2002 Hybrid Development Team
7 * Copyright (C) 2002-2005 ircd-ratbox development team
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
22 * USA
23 *
24 * $Id: m_join.c 3494 2007-05-27 13:07:27Z jilles $
25 */
26
27 #include "stdinc.h"
28 #include "channel.h"
29 #include "client.h"
30 #include "common.h"
31 #include "hash.h"
32 #include "match.h"
33 #include "ircd.h"
34 #include "numeric.h"
35 #include "send.h"
36 #include "s_serv.h"
37 #include "s_conf.h"
38 #include "s_newconf.h"
39 #include "msg.h"
40 #include "parse.h"
41 #include "modules.h"
42 #include "packet.h"
43 #include "chmode.h"
44
45 static int m_join(struct Client *, struct Client *, int, const char **);
46 static int ms_join(struct Client *, struct Client *, int, const char **);
47 static int ms_sjoin(struct Client *, struct Client *, int, const char **);
48
49 static int h_can_create_channel;
50 static int h_channel_join;
51
52 struct Message join_msgtab = {
53 "JOIN", 0, 0, 0, MFLG_SLOW,
54 {mg_unreg, {m_join, 2}, {ms_join, 2}, mg_ignore, mg_ignore, {m_join, 2}}
55 };
56
57 struct Message sjoin_msgtab = {
58 "SJOIN", 0, 0, 0, MFLG_SLOW,
59 {mg_unreg, mg_ignore, mg_ignore, {ms_sjoin, 4}, mg_ignore, mg_ignore}
60 };
61
62 mapi_clist_av1 join_clist[] = { &join_msgtab, &sjoin_msgtab, NULL };
63
64 mapi_hlist_av1 join_hlist[] = {
65 { "can_create_channel", &h_can_create_channel },
66 { "channel_join", &h_channel_join },
67 { NULL, NULL },
68 };
69
70 DECLARE_MODULE_AV1(join, NULL, NULL, join_clist, join_hlist, NULL, "$Revision: 3494 $");
71
72 static void do_join_0(struct Client *client_p, struct Client *source_p);
73 static int check_channel_name_loc(struct Client *source_p, const char *name);
74
75 static void set_final_mode(struct Mode *mode, struct Mode *oldmode);
76 static void remove_our_modes(struct Channel *chptr, struct Client *source_p);
77
78 static void remove_ban_list(struct Channel *chptr, struct Client *source_p,
79 rb_dlink_list * list, char c, int mems);
80
81 static char modebuf[MODEBUFLEN];
82 static char parabuf[MODEBUFLEN];
83 static const char *para[MAXMODEPARAMS];
84 static char *mbuf;
85 static int pargs;
86
87 /* Check what we will forward to, without sending any notices to the user
88 * -- jilles
89 */
90 static struct Channel *
91 check_forward(struct Client *source_p, struct Channel *chptr,
92 char *key)
93 {
94 int depth = 0, i;
95
96 /* User is +Q */
97 if (IsNoForward(source_p))
98 return NULL;
99
100 while (depth < 16)
101 {
102 chptr = find_channel(chptr->mode.forward);
103 /* Can only forward to existing channels */
104 if (chptr == NULL)
105 return NULL;
106 /* Already on there, show original error message */
107 if (IsMember(source_p, chptr))
108 return NULL;
109 /* Juped. Sending a warning notice would be unfair */
110 if (hash_find_resv(chptr->chname))
111 return NULL;
112 /* Don't forward to +Q channel */
113 if (chptr->mode.mode & MODE_DISFORWARD)
114 return NULL;
115 i = can_join(source_p, chptr, key);
116 if (i == 0)
117 return chptr;
118 if (i != ERR_INVITEONLYCHAN && i != ERR_NEEDREGGEDNICK && i != ERR_THROTTLE && i != ERR_CHANNELISFULL)
119 return NULL;
120 depth++;
121 }
122
123 return NULL;
124 }
125
126 /*
127 * m_join
128 * parv[1] = channel
129 * parv[2] = channel password (key)
130 */
131 static int
132 m_join(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
133 {
134 static char jbuf[BUFSIZE];
135 struct Channel *chptr = NULL;
136 struct ConfItem *aconf;
137 char *name;
138 char *key = NULL;
139 const char *modes;
140 int i, flags = 0;
141 char *p = NULL, *p2 = NULL;
142 char *chanlist;
143 char *mykey;
144 int successful_join_count = 0; /* Number of channels successfully joined */
145
146 jbuf[0] = '\0';
147
148 /* rebuild the list of channels theyre supposed to be joining.
149 * this code has a side effect of losing keys, but..
150 */
151 chanlist = LOCAL_COPY(parv[1]);
152 for(name = rb_strtok_r(chanlist, ",", &p); name; name = rb_strtok_r(NULL, ",", &p))
153 {
154 /* check the length and name of channel is ok */
155 if(!check_channel_name_loc(source_p, name) || (strlen(name) > LOC_CHANNELLEN))
156 {
157 sendto_one_numeric(source_p, ERR_BADCHANNAME,
158 form_str(ERR_BADCHANNAME), (unsigned char *) name);
159 continue;
160 }
161
162 /* join 0 parts all channels */
163 if(*name == '0' && (name[1] == ',' || name[1] == '\0') && name == chanlist)
164 {
165 (void) strcpy(jbuf, "0");
166 continue;
167 }
168
169 /* check it begins with # or &, and local chans are disabled */
170 else if(!IsChannelName(name))
171 {
172 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
173 form_str(ERR_NOSUCHCHANNEL), name);
174 continue;
175 }
176
177 /* see if its resv'd */
178 if(!IsExemptResv(source_p) && (aconf = hash_find_resv(name)))
179 {
180 sendto_one_numeric(source_p, ERR_BADCHANNAME,
181 form_str(ERR_BADCHANNAME), name);
182
183 /* dont warn for opers */
184 if(!IsExemptJupe(source_p) && !IsOper(source_p))
185 sendto_realops_snomask(SNO_SPY, L_NETWIDE,
186 "User %s (%s@%s) is attempting to join locally juped channel %s (%s)",
187 source_p->name, source_p->username,
188 source_p->orighost, name, aconf->passwd);
189 /* dont update tracking for jupe exempt users, these
190 * are likely to be spamtrap leaves
191 */
192 else if(IsExemptJupe(source_p))
193 aconf->port--;
194
195 continue;
196 }
197
198 if(splitmode && !IsOper(source_p) && (*name != '&') &&
199 ConfigChannel.no_join_on_split)
200 {
201 sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
202 me.name, source_p->name, name);
203 continue;
204 }
205
206 if(*jbuf)
207 (void) strcat(jbuf, ",");
208 (void) rb_strlcat(jbuf, name, sizeof(jbuf));
209 }
210
211 if(parc > 2)
212 {
213 mykey = LOCAL_COPY(parv[2]);
214 key = rb_strtok_r(mykey, ",", &p2);
215 }
216
217 for(name = rb_strtok_r(jbuf, ",", &p); name;
218 key = (key) ? rb_strtok_r(NULL, ",", &p2) : NULL, name = rb_strtok_r(NULL, ",", &p))
219 {
220 hook_data_channel_activity hook_info;
221
222 /* JOIN 0 simply parts all channels the user is in */
223 if(*name == '0' && !atoi(name))
224 {
225 if(source_p->user->channel.head == NULL)
226 continue;
227
228 do_join_0(&me, source_p);
229 continue;
230 }
231
232 /* look for the channel */
233 if((chptr = find_channel(name)) != NULL)
234 {
235 if(IsMember(source_p, chptr))
236 continue;
237
238 flags = 0;
239 }
240 else
241 {
242 hook_data_client_approval moduledata;
243
244 moduledata.client = source_p;
245 moduledata.approved = 0;
246
247 call_hook(h_can_create_channel, &moduledata);
248
249 if(moduledata.approved != 0)
250 {
251 sendto_one(source_p, form_str(moduledata.approved),
252 me.name, source_p->name, name);
253 continue;
254 }
255
256 if(splitmode && !IsOper(source_p) && (*name != '&') &&
257 ConfigChannel.no_create_on_split)
258 {
259 sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
260 me.name, source_p->name, name);
261 continue;
262 }
263
264 flags = CHFL_CHANOP;
265 }
266
267 if((rb_dlink_list_length(&source_p->user->channel) >=
268 (unsigned long) ConfigChannel.max_chans_per_user) &&
269 (!IsOper(source_p) ||
270 (rb_dlink_list_length(&source_p->user->channel) >=
271 (unsigned long) ConfigChannel.max_chans_per_user * 3)))
272 {
273 sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
274 me.name, source_p->name, name);
275 if(successful_join_count)
276 source_p->localClient->last_join_time = rb_current_time();
277 return 0;
278 }
279
280 if(flags == 0) /* if channel doesn't exist, don't penalize */
281 successful_join_count++;
282
283 if(chptr == NULL) /* If I already have a chptr, no point doing this */
284 {
285 chptr = get_or_create_channel(source_p, name, NULL);
286
287 if(chptr == NULL)
288 {
289 sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
290 me.name, source_p->name, name);
291 if(successful_join_count > 0)
292 successful_join_count--;
293 continue;
294 }
295 }
296
297 if(!IsOper(source_p) && !IsExemptSpambot(source_p))
298 check_spambot_warning(source_p, name);
299
300 /* can_join checks for +i key, bans etc */
301 if((i = can_join(source_p, chptr, key)))
302 {
303 if ((i != ERR_NEEDREGGEDNICK && i != ERR_THROTTLE && i != ERR_INVITEONLYCHAN && i != ERR_CHANNELISFULL) ||
304 (!ConfigChannel.use_forward || (chptr = check_forward(source_p, chptr, key)) == NULL))
305 {
306 /* might be wrong, but is there any other better location for such?
307 * see extensions/chm_operonly.c for other comments on this
308 * -- dwr
309 */
310 if(i != ERR_CUSTOM)
311 sendto_one(source_p, form_str(i), me.name, source_p->name, name);
312
313 if(successful_join_count > 0)
314 successful_join_count--;
315 continue;
316 }
317
318 sendto_one_numeric(source_p, ERR_LINKCHANNEL, form_str(ERR_LINKCHANNEL), name, chptr->chname);
319 }
320
321 /* add the user to the channel */
322 add_user_to_channel(chptr, source_p, flags);
323 if (chptr->mode.join_num &&
324 rb_current_time() - chptr->join_delta >= chptr->mode.join_time)
325 {
326 chptr->join_count = 0;
327 chptr->join_delta = rb_current_time();
328 }
329 chptr->join_count++;
330
331 /* we send the user their join here, because we could have to
332 * send a mode out next.
333 */
334 sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s JOIN :%s",
335 source_p->name,
336 source_p->username, source_p->host, chptr->chname);
337
338 /* its a new channel, set +nt and burst. */
339 if(flags & CHFL_CHANOP)
340 {
341 chptr->channelts = rb_current_time();
342 chptr->mode.mode |= MODE_TOPICLIMIT;
343 chptr->mode.mode |= MODE_NOPRIVMSGS;
344 modes = channel_modes(chptr, &me);
345
346 sendto_channel_local(ONLY_CHANOPS, chptr, ":%s MODE %s %s",
347 me.name, chptr->chname, modes);
348
349 sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
350 ":%s SJOIN %ld %s %s :@%s",
351 me.id, (long) chptr->channelts,
352 chptr->chname, modes, source_p->id);
353 }
354 else
355 {
356 sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
357 ":%s JOIN %ld %s +",
358 use_id(source_p), (long) chptr->channelts,
359 chptr->chname);
360 }
361
362 del_invite(chptr, source_p);
363
364 if(chptr->topic != NULL)
365 {
366 sendto_one(source_p, form_str(RPL_TOPIC), me.name,
367 source_p->name, chptr->chname, chptr->topic);
368
369 sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
370 me.name, source_p->name, chptr->chname,
371 chptr->topic_info, chptr->topic_time);
372 }
373
374 channel_member_names(chptr, source_p, 1);
375
376 if(successful_join_count)
377 source_p->localClient->last_join_time = rb_current_time();
378
379 hook_info.client = source_p;
380 hook_info.chptr = chptr;
381 hook_info.key = key;
382 call_hook(h_channel_join, &hook_info);
383 }
384
385 return 0;
386 }
387
388 /*
389 * ms_join
390 * parv[1] = channel TS
391 * parv[2] = channel
392 * parv[3] = "+", formerly channel modes but now unused
393 * alternatively, a single "0" parameter parts all channels
394 */
395 static int
396 ms_join(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
397 {
398 struct Channel *chptr;
399 static struct Mode mode;
400 time_t oldts;
401 time_t newts;
402 int isnew;
403 int keep_our_modes = YES;
404 int keep_new_modes = YES;
405 rb_dlink_node *ptr, *next_ptr;
406
407 /* special case for join 0 */
408 if((parv[1][0] == '0') && (parv[1][1] == '\0') && parc == 2)
409 {
410 do_join_0(client_p, source_p);
411 return 0;
412 }
413
414 if(parc < 4)
415 return 0;
416
417 if(!IsChannelName(parv[2]) || !check_channel_name(parv[2]))
418 return 0;
419
420 /* joins for local channels cant happen. */
421 if(parv[2][0] == '&')
422 return 0;
423
424 mbuf = modebuf;
425 mode.key[0] = mode.forward[0] = '\0';
426 mode.mode = mode.limit = mode.join_num = mode.join_time = 0;
427
428 if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
429 return 0;
430
431 newts = atol(parv[1]);
432 oldts = chptr->channelts;
433
434 #ifdef IGNORE_BOGUS_TS
435 if(newts < 800000000)
436 {
437 sendto_realops_snomask(SNO_DEBUG, L_ALL,
438 "*** Bogus TS %ld on %s ignored from %s",
439 (long) newts, chptr->chname, client_p->name);
440 newts = (oldts == 0) ? oldts : 800000000;
441 }
442 #else
443 /* making a channel TS0 */
444 if(!isnew && !newts && oldts)
445 {
446 sendto_channel_local(ALL_MEMBERS, chptr,
447 ":%s NOTICE %s :*** Notice -- TS for %s changed from %ld to 0",
448 me.name, chptr->chname, chptr->chname, (long) oldts);
449 sendto_realops_snomask(SNO_GENERAL, L_ALL,
450 "Server %s changing TS on %s from %ld to 0",
451 source_p->name, chptr->chname, (long) oldts);
452 }
453 #endif
454
455 if(isnew)
456 chptr->channelts = newts;
457 else if(newts == 0 || oldts == 0)
458 chptr->channelts = 0;
459 else if(newts == oldts)
460 ;
461 else if(newts < oldts)
462 {
463 keep_our_modes = NO;
464 chptr->channelts = newts;
465 }
466 else
467 keep_new_modes = NO;
468
469 /* Lost the TS, other side wins, so remove modes on this side */
470 if(!keep_our_modes)
471 {
472 set_final_mode(&mode, &chptr->mode);
473 chptr->mode = mode;
474 remove_our_modes(chptr, source_p);
475 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head)
476 {
477 del_invite(chptr, ptr->data);
478 }
479 /* If setting -j, clear join throttle state -- jilles */
480 chptr->join_count = chptr->join_delta = 0;
481 sendto_channel_local(ALL_MEMBERS, chptr,
482 ":%s NOTICE %s :*** Notice -- TS for %s changed from %ld to %ld",
483 me.name, chptr->chname, chptr->chname,
484 (long) oldts, (long) newts);
485 /* Update capitalization in channel name, this makes the
486 * capitalization timestamped like modes are -- jilles */
487 strcpy(chptr->chname, parv[2]);
488 if(*modebuf != '\0')
489 sendto_channel_local(ALL_MEMBERS, chptr,
490 ":%s MODE %s %s %s",
491 source_p->servptr->name,
492 chptr->chname, modebuf, parabuf);
493 *modebuf = *parabuf = '\0';
494 }
495
496 if(!IsMember(source_p, chptr))
497 {
498 add_user_to_channel(chptr, source_p, CHFL_PEON);
499 if (chptr->mode.join_num &&
500 rb_current_time() - chptr->join_delta >= chptr->mode.join_time)
501 {
502 chptr->join_count = 0;
503 chptr->join_delta = rb_current_time();
504 }
505 chptr->join_count++;
506 sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s JOIN :%s",
507 source_p->name, source_p->username,
508 source_p->host, chptr->chname);
509 }
510
511 sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
512 ":%s JOIN %ld %s +",
513 source_p->id, (long) chptr->channelts, chptr->chname);
514 return 0;
515 }
516
517 static int
518 ms_sjoin(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
519 {
520 static char buf_uid[BUFSIZE];
521 static const char empty_modes[] = "0";
522 struct Channel *chptr;
523 struct Client *target_p, *fakesource_p;
524 time_t newts;
525 time_t oldts;
526 static struct Mode mode, *oldmode;
527 const char *modes;
528 int args = 0;
529 int keep_our_modes = 1;
530 int keep_new_modes = 1;
531 int fl;
532 int isnew;
533 int mlen_uid;
534 int len_nick;
535 int len_uid;
536 int len;
537 int joins = 0;
538 const char *s;
539 char *ptr_uid;
540 char *p;
541 int i, joinc = 0, timeslice = 0;
542 static char empty[] = "";
543 rb_dlink_node *ptr, *next_ptr;
544
545 if(!IsChannelName(parv[2]) || !check_channel_name(parv[2]))
546 return 0;
547
548 /* SJOIN's for local channels can't happen. */
549 if(*parv[2] == '&')
550 return 0;
551
552 modebuf[0] = parabuf[0] = mode.key[0] = mode.forward[0] = '\0';
553 pargs = mode.mode = mode.limit = mode.join_num = mode.join_time = 0;
554
555 /* Hide connecting server on netburst -- jilles */
556 if (ConfigServerHide.flatten_links && !HasSentEob(source_p))
557 fakesource_p = &me;
558 else
559 fakesource_p = source_p;
560
561 mbuf = modebuf;
562 newts = atol(parv[1]);
563
564 s = parv[3];
565 while (*s)
566 {
567 switch (*(s++))
568 {
569 case 'f':
570 rb_strlcpy(mode.forward, parv[4 + args], sizeof(mode.forward));
571 args++;
572 if(parc < 5 + args)
573 return 0;
574 break;
575 case 'j':
576 sscanf(parv[4 + args], "%d:%d", &joinc, &timeslice);
577 args++;
578 mode.join_num = joinc;
579 mode.join_time = timeslice;
580 if(parc < 5 + args)
581 return 0;
582 break;
583 case 'k':
584 rb_strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
585 args++;
586 if(parc < 5 + args)
587 return 0;
588 break;
589 case 'l':
590 mode.limit = atoi(parv[4 + args]);
591 args++;
592 if(parc < 5 + args)
593 return 0;
594 break;
595 default:
596 if(chmode_flags[(int) *s] != 0)
597 {
598 mode.mode |= chmode_flags[(int) *s];
599 }
600 }
601 }
602
603 if(parv[args + 4])
604 {
605 s = parv[args + 4];
606
607 /* remove any leading spaces */
608 while (*s == ' ')
609 s++;
610 }
611 else
612 s = "";
613
614 if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
615 return 0; /* channel name too long? */
616
617
618 oldts = chptr->channelts;
619 oldmode = &chptr->mode;
620
621 #ifdef IGNORE_BOGUS_TS
622 if(newts < 800000000)
623 {
624 sendto_realops_snomask(SNO_DEBUG, L_ALL,
625 "*** Bogus TS %ld on %s ignored from %s",
626 (long) newts, chptr->chname, client_p->name);
627
628 newts = (oldts == 0) ? oldts : 800000000;
629 }
630 #else
631 if(!isnew && !newts && oldts)
632 {
633 sendto_channel_local(ALL_MEMBERS, chptr,
634 ":%s NOTICE %s :*** Notice -- TS for %s "
635 "changed from %ld to 0",
636 me.name, chptr->chname, chptr->chname, (long) oldts);
637 sendto_realops_snomask(SNO_GENERAL, L_ALL,
638 "Server %s changing TS on %s from %ld to 0",
639 source_p->name, chptr->chname, (long) oldts);
640 }
641 #endif
642
643 if(isnew)
644 chptr->channelts = newts;
645
646 else if(newts == 0 || oldts == 0)
647 chptr->channelts = 0;
648 else if(newts == oldts)
649 ;
650 else if(newts < oldts)
651 {
652 /* If configured, kick people trying to join +i/+k
653 * channels by recreating them on split servers.
654 * Don't kick if the source has sent EOB (services
655 * deopping everyone by TS-1 SJOIN).
656 * -- jilles */
657 if (ConfigChannel.kick_on_split_riding &&
658 !HasSentEob(source_p) &&
659 ((mode.mode & MODE_INVITEONLY) ||
660 (mode.key[0] != 0 && irccmp(mode.key, oldmode->key) != 0)))
661 {
662 struct membership *msptr;
663 struct Client *who;
664 int l = rb_dlink_list_length(&chptr->members);
665
666 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head)
667 {
668 msptr = ptr->data;
669 who = msptr->client_p;
670 sendto_one(who, ":%s KICK %s %s :Net Rider",
671 me.name, chptr->chname, who->name);
672
673 sendto_server(NULL, chptr, CAP_TS6, NOCAPS,
674 ":%s KICK %s %s :Net Rider",
675 me.id, chptr->chname,
676 who->id);
677 remove_user_from_channel(msptr);
678 if (--l == 0)
679 break;
680 }
681 if (l == 0)
682 {
683 /* Channel was emptied, create a new one */
684 if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
685 return 0; /* oops! */
686
687 oldmode = &chptr->mode;
688 }
689 }
690 keep_our_modes = NO;
691 chptr->channelts = newts;
692 }
693 else
694 keep_new_modes = NO;
695
696 if(!keep_new_modes)
697 mode = *oldmode;
698 else if(keep_our_modes)
699 {
700 mode.mode |= oldmode->mode;
701 if(oldmode->limit > mode.limit)
702 mode.limit = oldmode->limit;
703 if(strcmp(mode.key, oldmode->key) < 0)
704 strcpy(mode.key, oldmode->key);
705 if(oldmode->join_num > mode.join_num ||
706 (oldmode->join_num == mode.join_num &&
707 oldmode->join_time > mode.join_time))
708 {
709 mode.join_num = oldmode->join_num;
710 mode.join_time = oldmode->join_time;
711 }
712 if(irccmp(mode.forward, oldmode->forward) < 0)
713 strcpy(mode.forward, oldmode->forward);
714 }
715 else
716 {
717 /* If setting -j, clear join throttle state -- jilles */
718 if (!mode.join_num)
719 chptr->join_count = chptr->join_delta = 0;
720 }
721
722 set_final_mode(&mode, oldmode);
723 chptr->mode = mode;
724
725 /* Lost the TS, other side wins, so remove modes on this side */
726 if(!keep_our_modes)
727 {
728 remove_our_modes(chptr, fakesource_p);
729 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head)
730 {
731 del_invite(chptr, ptr->data);
732 }
733
734 if(rb_dlink_list_length(&chptr->banlist) > 0)
735 remove_ban_list(chptr, fakesource_p, &chptr->banlist, 'b', ALL_MEMBERS);
736 if(rb_dlink_list_length(&chptr->exceptlist) > 0)
737 remove_ban_list(chptr, fakesource_p, &chptr->exceptlist,
738 'e', ONLY_CHANOPS);
739 if(rb_dlink_list_length(&chptr->invexlist) > 0)
740 remove_ban_list(chptr, fakesource_p, &chptr->invexlist,
741 'I', ONLY_CHANOPS);
742 if(rb_dlink_list_length(&chptr->quietlist) > 0)
743 remove_ban_list(chptr, fakesource_p, &chptr->quietlist,
744 'q', ALL_MEMBERS);
745 chptr->bants++;
746
747 sendto_channel_local(ALL_MEMBERS, chptr,
748 ":%s NOTICE %s :*** Notice -- TS for %s changed from %ld to %ld",
749 me.name, chptr->chname, chptr->chname,
750 (long) oldts, (long) newts);
751 /* Update capitalization in channel name, this makes the
752 * capitalization timestamped like modes are -- jilles */
753 strcpy(chptr->chname, parv[2]);
754 }
755
756 if(*modebuf != '\0')
757 sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s %s %s",
758 fakesource_p->name, chptr->chname, modebuf, parabuf);
759
760 *modebuf = *parabuf = '\0';
761
762 if(parv[3][0] != '0' && keep_new_modes)
763 modes = channel_modes(chptr, source_p);
764 else
765 modes = empty_modes;
766
767 mlen_uid = rb_sprintf(buf_uid, ":%s SJOIN %ld %s %s :",
768 use_id(source_p), (long) chptr->channelts, parv[2], modes);
769 ptr_uid = buf_uid + mlen_uid;
770
771 mbuf = modebuf;
772 para[0] = para[1] = para[2] = para[3] = empty;
773 pargs = 0;
774 len_nick = len_uid = 0;
775
776 /* if theres a space, theres going to be more than one nick, change the
777 * first space to \0, so s is just the first nick, and point p to the
778 * second nick
779 */
780 if((p = strchr(s, ' ')) != NULL)
781 {
782 *p++ = '\0';
783 }
784
785 *mbuf++ = '+';
786
787 while (s)
788 {
789 fl = 0;
790
791 for (i = 0; i < 2; i++)
792 {
793 if(*s == '@')
794 {
795 fl |= CHFL_CHANOP;
796 s++;
797 }
798 else if(*s == '+')
799 {
800 fl |= CHFL_VOICE;
801 s++;
802 }
803 }
804
805 /* if the client doesnt exist or is fake direction, skip. */
806 if(!(target_p = find_client(s)) ||
807 (target_p->from != client_p) || !IsPerson(target_p))
808 goto nextnick;
809
810 /* we assume for these we can fit at least one nick/uid in.. */
811
812 /* check we can fit another status+nick+space into a buffer */
813 if((mlen_uid + len_uid + IDLEN + 3) > (BUFSIZE - 3))
814 {
815 *(ptr_uid - 1) = '\0';
816 sendto_server(client_p->from, NULL, CAP_TS6, NOCAPS, "%s", buf_uid);
817 ptr_uid = buf_uid + mlen_uid;
818 len_uid = 0;
819 }
820
821 if(keep_new_modes)
822 {
823 if(fl & CHFL_CHANOP)
824 {
825 *ptr_uid++ = '@';
826 len_nick++;
827 len_uid++;
828 }
829 if(fl & CHFL_VOICE)
830 {
831 *ptr_uid++ = '+';
832 len_nick++;
833 len_uid++;
834 }
835 }
836
837 /* copy the nick to the two buffers */
838 len = rb_sprintf(ptr_uid, "%s ", use_id(target_p));
839 ptr_uid += len;
840 len_uid += len;
841
842 if(!keep_new_modes)
843 fl = 0;
844
845 if(!IsMember(target_p, chptr))
846 {
847 add_user_to_channel(chptr, target_p, fl);
848 sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s JOIN :%s",
849 target_p->name,
850 target_p->username, target_p->host, parv[2]);
851 joins++;
852 }
853
854 if(fl & CHFL_CHANOP)
855 {
856 *mbuf++ = 'o';
857 para[pargs++] = target_p->name;
858
859 /* a +ov user.. bleh */
860 if(fl & CHFL_VOICE)
861 {
862 /* its possible the +o has filled up MAXMODEPARAMS, if so, start
863 * a new buffer
864 */
865 if(pargs >= MAXMODEPARAMS)
866 {
867 *mbuf = '\0';
868 sendto_channel_local(ALL_MEMBERS, chptr,
869 ":%s MODE %s %s %s %s %s %s",
870 fakesource_p->name, chptr->chname,
871 modebuf,
872 para[0], para[1], para[2], para[3]);
873 mbuf = modebuf;
874 *mbuf++ = '+';
875 para[0] = para[1] = para[2] = para[3] = NULL;
876 pargs = 0;
877 }
878
879 *mbuf++ = 'v';
880 para[pargs++] = target_p->name;
881 }
882 }
883 else if(fl & CHFL_VOICE)
884 {
885 *mbuf++ = 'v';
886 para[pargs++] = target_p->name;
887 }
888
889 if(pargs >= MAXMODEPARAMS)
890 {
891 *mbuf = '\0';
892 sendto_channel_local(ALL_MEMBERS, chptr,
893 ":%s MODE %s %s %s %s %s %s",
894 fakesource_p->name,
895 chptr->chname,
896 modebuf, para[0], para[1], para[2], para[3]);
897 mbuf = modebuf;
898 *mbuf++ = '+';
899 para[0] = para[1] = para[2] = para[3] = NULL;
900 pargs = 0;
901 }
902
903 nextnick:
904 /* p points to the next nick */
905 s = p;
906
907 /* if there was a trailing space and p was pointing to it, then we
908 * need to exit.. this has the side effect of breaking double spaces
909 * in an sjoin.. but that shouldnt happen anyway
910 */
911 if(s && (*s == '\0'))
912 s = p = NULL;
913
914 /* if p was NULL due to no spaces, s wont exist due to the above, so
915 * we cant check it for spaces.. if there are no spaces, then when
916 * we next get here, s will be NULL
917 */
918 if(s && ((p = strchr(s, ' ')) != NULL))
919 {
920 *p++ = '\0';
921 }
922 }
923
924 *mbuf = '\0';
925 if(pargs)
926 {
927 sendto_channel_local(ALL_MEMBERS, chptr,
928 ":%s MODE %s %s %s %s %s %s",
929 fakesource_p->name, chptr->chname, modebuf,
930 para[0], CheckEmpty(para[1]),
931 CheckEmpty(para[2]), CheckEmpty(para[3]));
932 }
933
934 if(!joins && !(chptr->mode.mode & MODE_PERMANENT) && isnew)
935 {
936 destroy_channel(chptr);
937
938 return 0;
939 }
940
941 /* Keep the colon if we're sending an SJOIN without nicks -- jilles */
942 if (joins)
943 {
944 *(ptr_uid - 1) = '\0';
945 }
946
947 sendto_server(client_p->from, NULL, CAP_TS6, NOCAPS, "%s", buf_uid);
948
949 return 0;
950 }
951
952 /*
953 * do_join_0
954 *
955 * inputs - pointer to client doing join 0
956 * output - NONE
957 * side effects - Use has decided to join 0. This is legacy
958 * from the days when channels were numbers not names. *sigh*
959 * There is a bunch of evilness necessary here due to
960 * anti spambot code.
961 */
962 static void
963 do_join_0(struct Client *client_p, struct Client *source_p)
964 {
965 struct membership *msptr;
966 struct Channel *chptr = NULL;
967 rb_dlink_node *ptr;
968
969 /* Finish the flood grace period... */
970 if(MyClient(source_p) && !IsFloodDone(source_p))
971 flood_endgrace(source_p);
972
973 sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s JOIN 0", use_id(source_p));
974
975 if(source_p->user->channel.head && MyConnect(source_p) &&
976 !IsOper(source_p) && !IsExemptSpambot(source_p))
977 check_spambot_warning(source_p, NULL);
978
979 while((ptr = source_p->user->channel.head))
980 {
981 msptr = ptr->data;
982 chptr = msptr->chptr;
983 sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s PART %s",
984 source_p->name,
985 source_p->username, source_p->host, chptr->chname);
986 remove_user_from_channel(msptr);
987 }
988 }
989
990 static int
991 check_channel_name_loc(struct Client *source_p, const char *name)
992 {
993 s_assert(name != NULL);
994 if(EmptyString(name))
995 return 0;
996
997 if(ConfigFileEntry.disable_fake_channels && !IsOper(source_p))
998 {
999 for(; *name; ++name)
1000 {
1001 if(!IsChanChar(*name) || IsFakeChanChar(*name))
1002 return 0;
1003 }
1004 }
1005 else
1006 {
1007 for(; *name; ++name)
1008 {
1009 if(!IsChanChar(*name))
1010 return 0;
1011 }
1012 }
1013
1014 return 1;
1015 }
1016
1017 static void
1018 set_final_mode(struct Mode *mode, struct Mode *oldmode)
1019 {
1020 int dir = MODE_QUERY;
1021 char *pbuf = parabuf;
1022 int len;
1023 int i;
1024
1025 /* ok, first get a list of modes we need to add */
1026 for (i = 0; i < 256; i++)
1027 {
1028 if((mode->mode & chmode_flags[i]) && !(oldmode->mode & chmode_flags[i]))
1029 {
1030 if(dir != MODE_ADD)
1031 {
1032 *mbuf++ = '+';
1033 dir = MODE_ADD;
1034 }
1035 *mbuf++ = i;
1036 }
1037 }
1038
1039 /* now the ones we need to remove. */
1040 for (i = 0; i < 256; i++)
1041 {
1042 if((oldmode->mode & chmode_flags[i]) && !(mode->mode & chmode_flags[i]))
1043 {
1044 if(dir != MODE_DEL)
1045 {
1046 *mbuf++ = '-';
1047 dir = MODE_DEL;
1048 }
1049 *mbuf++ = i;
1050 }
1051 }
1052
1053 if(oldmode->limit && !mode->limit)
1054 {
1055 if(dir != MODE_DEL)
1056 {
1057 *mbuf++ = '-';
1058 dir = MODE_DEL;
1059 }
1060 *mbuf++ = 'l';
1061 }
1062 if(oldmode->key[0] && !mode->key[0])
1063 {
1064 if(dir != MODE_DEL)
1065 {
1066 *mbuf++ = '-';
1067 dir = MODE_DEL;
1068 }
1069 *mbuf++ = 'k';
1070 len = rb_sprintf(pbuf, "%s ", oldmode->key);
1071 pbuf += len;
1072 }
1073 if(oldmode->join_num && !mode->join_num)
1074 {
1075 if(dir != MODE_DEL)
1076 {
1077 *mbuf++ = '-';
1078 dir = MODE_DEL;
1079 }
1080 *mbuf++ = 'j';
1081 }
1082 if(oldmode->forward[0] && !mode->forward[0])
1083 {
1084 if(dir != MODE_DEL)
1085 {
1086 *mbuf++ = '-';
1087 dir = MODE_DEL;
1088 }
1089 *mbuf++ = 'f';
1090 }
1091 if(mode->limit && oldmode->limit != mode->limit)
1092 {
1093 if(dir != MODE_ADD)
1094 {
1095 *mbuf++ = '+';
1096 dir = MODE_ADD;
1097 }
1098 *mbuf++ = 'l';
1099 len = rb_sprintf(pbuf, "%d ", mode->limit);
1100 pbuf += len;
1101 }
1102 if(mode->key[0] && strcmp(oldmode->key, mode->key))
1103 {
1104 if(dir != MODE_ADD)
1105 {
1106 *mbuf++ = '+';
1107 dir = MODE_ADD;
1108 }
1109 *mbuf++ = 'k';
1110 len = rb_sprintf(pbuf, "%s ", mode->key);
1111 pbuf += len;
1112 }
1113 if(mode->join_num && (oldmode->join_num != mode->join_num || oldmode->join_time != mode->join_time))
1114 {
1115 if(dir != MODE_ADD)
1116 {
1117 *mbuf++ = '+';
1118 dir = MODE_ADD;
1119 }
1120 *mbuf++ = 'j';
1121 len = rb_sprintf(pbuf, "%d:%d ", mode->join_num, mode->join_time);
1122 pbuf += len;
1123 }
1124 if(mode->forward[0] && strcmp(oldmode->forward, mode->forward) && ConfigChannel.use_forward)
1125 {
1126 if(dir != MODE_ADD)
1127 {
1128 *mbuf++ = '+';
1129 dir = MODE_ADD;
1130 }
1131 *mbuf++ = 'f';
1132 len = rb_sprintf(pbuf, "%s ", mode->forward);
1133 pbuf += len;
1134 }
1135 *mbuf = '\0';
1136 }
1137
1138 /*
1139 * remove_our_modes
1140 *
1141 * inputs -
1142 * output -
1143 * side effects -
1144 */
1145 static void
1146 remove_our_modes(struct Channel *chptr, struct Client *source_p)
1147 {
1148 struct membership *msptr;
1149 rb_dlink_node *ptr;
1150 char lmodebuf[MODEBUFLEN];
1151 char *lpara[MAXMODEPARAMS];
1152 int count = 0;
1153 int i;
1154
1155 mbuf = lmodebuf;
1156 *mbuf++ = '-';
1157
1158 for(i = 0; i < MAXMODEPARAMS; i++)
1159 lpara[i] = NULL;
1160
1161 RB_DLINK_FOREACH(ptr, chptr->members.head)
1162 {
1163 msptr = ptr->data;
1164
1165 if(is_chanop(msptr))
1166 {
1167 msptr->flags &= ~CHFL_CHANOP;
1168 lpara[count++] = msptr->client_p->name;
1169 *mbuf++ = 'o';
1170
1171 /* +ov, might not fit so check. */
1172 if(is_voiced(msptr))
1173 {
1174 if(count >= MAXMODEPARAMS)
1175 {
1176 *mbuf = '\0';
1177 sendto_channel_local(ALL_MEMBERS, chptr,
1178 ":%s MODE %s %s %s %s %s %s",
1179 source_p->name, chptr->chname,
1180 lmodebuf, lpara[0], lpara[1],
1181 lpara[2], lpara[3]);
1182
1183 /* preserve the initial '-' */
1184 mbuf = lmodebuf;
1185 *mbuf++ = '-';
1186 count = 0;
1187
1188 for(i = 0; i < MAXMODEPARAMS; i++)
1189 lpara[i] = NULL;
1190 }
1191
1192 msptr->flags &= ~CHFL_VOICE;
1193 lpara[count++] = msptr->client_p->name;
1194 *mbuf++ = 'v';
1195 }
1196 }
1197 else if(is_voiced(msptr))
1198 {
1199 msptr->flags &= ~CHFL_VOICE;
1200 lpara[count++] = msptr->client_p->name;
1201 *mbuf++ = 'v';
1202 }
1203 else
1204 continue;
1205
1206 if(count >= MAXMODEPARAMS)
1207 {
1208 *mbuf = '\0';
1209 sendto_channel_local(ALL_MEMBERS, chptr,
1210 ":%s MODE %s %s %s %s %s %s",
1211 source_p->name, chptr->chname, lmodebuf,
1212 lpara[0], lpara[1], lpara[2], lpara[3]);
1213 mbuf = lmodebuf;
1214 *mbuf++ = '-';
1215 count = 0;
1216
1217 for(i = 0; i < MAXMODEPARAMS; i++)
1218 lpara[i] = NULL;
1219 }
1220 }
1221
1222 if(count != 0)
1223 {
1224 *mbuf = '\0';
1225 sendto_channel_local(ALL_MEMBERS, chptr,
1226 ":%s MODE %s %s %s %s %s %s",
1227 source_p->name, chptr->chname, lmodebuf,
1228 EmptyString(lpara[0]) ? "" : lpara[0],
1229 EmptyString(lpara[1]) ? "" : lpara[1],
1230 EmptyString(lpara[2]) ? "" : lpara[2],
1231 EmptyString(lpara[3]) ? "" : lpara[3]);
1232
1233 }
1234 }
1235
1236 /* remove_ban_list()
1237 *
1238 * inputs - channel, source, list to remove, char of mode, caps needed
1239 * outputs -
1240 * side effects - given list is removed, with modes issued to local clients
1241 */
1242 static void
1243 remove_ban_list(struct Channel *chptr, struct Client *source_p,
1244 rb_dlink_list * list, char c, int mems)
1245 {
1246 static char lmodebuf[BUFSIZE];
1247 static char lparabuf[BUFSIZE];
1248 struct Ban *banptr;
1249 rb_dlink_node *ptr;
1250 rb_dlink_node *next_ptr;
1251 char *pbuf;
1252 int count = 0;
1253 int cur_len, mlen, plen;
1254
1255 pbuf = lparabuf;
1256
1257 cur_len = mlen = rb_sprintf(lmodebuf, ":%s MODE %s -", source_p->name, chptr->chname);
1258 mbuf = lmodebuf + mlen;
1259
1260 RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
1261 {
1262 banptr = ptr->data;
1263
1264 /* trailing space, and the mode letter itself */
1265 plen = strlen(banptr->banstr) + 2;
1266
1267 if(count >= MAXMODEPARAMS || (cur_len + plen) > BUFSIZE - 4)
1268 {
1269 /* remove trailing space */
1270 *mbuf = '\0';
1271 *(pbuf - 1) = '\0';
1272
1273 sendto_channel_local(mems, chptr, "%s %s", lmodebuf, lparabuf);
1274
1275 cur_len = mlen;
1276 mbuf = lmodebuf + mlen;
1277 pbuf = lparabuf;
1278 count = 0;
1279 }
1280
1281 *mbuf++ = c;
1282 cur_len += plen;
1283 pbuf += rb_sprintf(pbuf, "%s ", banptr->banstr);
1284 count++;
1285
1286 free_ban(banptr);
1287 }
1288
1289 *mbuf = '\0';
1290 *(pbuf - 1) = '\0';
1291 sendto_channel_local(mems, chptr, "%s %s", lmodebuf, lparabuf);
1292
1293 list->head = list->tail = NULL;
1294 list->length = 0;
1295 }
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