/[svn]/ircd-hybrid-7.2/modules/core/m_join.c
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Contents of /ircd-hybrid-7.2/modules/core/m_join.c

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Revision 853 - (show annotations)
Thu Feb 22 06:01:30 2007 UTC (14 years, 1 month ago) by db
File MIME type: text/x-chdr
File size: 18514 byte(s)
- fix typo in ircd_parser.y regenerate y.tab.c and lex.yy.c
- fix order shown in CLIEXIT
- remove mode parsing in ms_join
- reflect addiction cconn_full flag


1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * m_join.c: Joins a channel.
4 *
5 * Copyright (C) 2002 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #include "tools.h"
27 #include "handlers.h"
28 #include "channel.h"
29 #include "channel_mode.h"
30 #include "client.h"
31 #include "common.h" /* bleah */
32 #include "hash.h"
33 #include "irc_string.h"
34 #include "sprintf_irc.h"
35 #include "ircd.h"
36 #include "list.h"
37 #include "numeric.h"
38 #include "send.h"
39 #include "s_serv.h"
40 #include "s_conf.h"
41 #include "msg.h"
42 #include "parse.h"
43 #include "modules.h"
44
45
46 static void m_join(struct Client *, struct Client *, int, char **);
47 static void ms_join(struct Client *, struct Client *, int, char **);
48 static void do_join_0(struct Client *client_p, struct Client *source_p);
49
50 static void set_final_mode(struct Mode *, struct Mode *);
51 static void remove_our_modes(struct Channel *, struct Client *);
52 static void remove_a_mode(struct Channel *, struct Client *, int, char);
53
54 static char modebuf[MODEBUFLEN];
55 static char parabuf[MODEBUFLEN];
56 static char sendbuf[MODEBUFLEN];
57 static char *mbuf;
58
59 struct Message join_msgtab = {
60 "JOIN", 0, 0, 2, 0, MFLG_SLOW, 0,
61 {m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore}
62 };
63
64 #ifndef STATIC_MODULES
65 void
66 _modinit(void)
67 {
68 mod_add_cmd(&join_msgtab);
69 }
70
71 void
72 _moddeinit(void)
73 {
74 mod_del_cmd(&join_msgtab);
75 }
76
77 const char *_version = "$Revision$";
78 #endif
79
80 /* last0() stolen from ircu */
81 static char *
82 last0(struct Client *client_p, struct Client *source_p, char *chanlist)
83 {
84 char *p;
85 int join0 = 0;
86
87 for (p = chanlist; *p; ++p) /* find last "JOIN 0" */
88 {
89 if (*p == '0' && (*(p + 1) == ',' || *(p + 1) == '\0'))
90 {
91 if ((*p + 1) == ',')
92 ++p;
93
94 chanlist = p + 1;
95 join0 = 1;
96 }
97 else
98 {
99 while (*p != ',' && *p != '\0') /* skip past channel name */
100 ++p;
101
102 if (*p == '\0') /* hit the end */
103 break;
104 }
105 }
106
107 if (join0)
108 do_join_0(client_p, source_p);
109
110 return chanlist;
111 }
112
113 /* m_join()
114 * parv[0] = sender prefix
115 * parv[1] = channel
116 * parv[2] = channel password (key)
117 */
118 static void
119 m_join(struct Client *client_p, struct Client *source_p,
120 int parc, char *parv[])
121 {
122 char *p = NULL;
123 char *key_list = NULL;
124 char *chan_list = NULL;
125 char *chan = NULL;
126 struct Channel *chptr = NULL;
127 int i = 0;
128 unsigned int flags = 0;
129
130 if (EmptyString(parv[1]))
131 {
132 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
133 me.name, source_p->name, "JOIN");
134 return;
135 }
136
137 assert(client_p == source_p);
138
139 key_list = parv[2];
140 chan_list = last0(client_p, source_p, parv[1]);
141
142 for (chan = strtoken(&p, chan_list, ","); chan;
143 chan = strtoken(&p, NULL, ","))
144 {
145 char *key = NULL;
146
147 /* If we have any more keys, take the first for this channel. */
148 if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
149 *key_list++ = '\0';
150
151 /* Empty keys are the same as no keys. */
152 if (key && *key == '\0')
153 key = NULL;
154
155 if (!check_channel_name(chan, 1))
156 {
157 sendto_one(source_p, form_str(ERR_BADCHANNAME),
158 me.name, source_p->name, chan);
159 continue;
160 }
161
162 if (ConfigChannel.disable_local_channels && (*chan == '&'))
163 {
164 sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
165 me.name, source_p->name, chan);
166 continue;
167 }
168
169 if (!IsExemptResv(source_p) &&
170 !(IsOper(source_p) && ConfigFileEntry.oper_pass_resv) &&
171 (!hash_find_resv(chan) == ConfigChannel.restrict_channels))
172 {
173 sendto_one(source_p, form_str(ERR_BADCHANNAME),
174 me.name, source_p->name, chan);
175 sendto_realops_flags(UMODE_SPY, L_ALL,
176 "User %s (%s@%s) is attempting to join locally juped channel %s",
177 source_p->name, source_p->username, source_p->host, chan);
178 continue;
179 }
180
181 if ((dlink_list_length(&source_p->channel) >= ConfigChannel.max_chans_per_user) &&
182 (!IsOper(source_p) || (dlink_list_length(&source_p->channel) >=
183 ConfigChannel.max_chans_per_user * 3)))
184 {
185 sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
186 me.name, source_p->name, chan);
187 break;
188 }
189
190 if ((chptr = hash_find_channel(chan)) != NULL)
191 {
192 if (IsMember(source_p, chptr))
193 continue;
194
195 if (splitmode && !IsOper(source_p) && (*chan != '&') &&
196 ConfigChannel.no_join_on_split)
197 {
198 sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
199 me.name, source_p->name, chan);
200 continue;
201 }
202
203 /*
204 * This should never be the case unless there is some sort of
205 * persistant channels.
206 */
207 if (dlink_list_length(&chptr->members) == 0)
208 flags = CHFL_CHANOP;
209 else
210 flags = 0;
211 }
212 else
213 {
214 if (splitmode && !IsOper(source_p) && (*chan != '&') &&
215 (ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split))
216 {
217 sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
218 me.name, source_p->name, chan);
219 continue;
220 }
221
222 flags = CHFL_CHANOP;
223 chptr = make_channel(chan);
224 }
225
226 if (!IsOper(source_p))
227 check_spambot_warning(source_p, chptr->chname);
228
229 /*
230 * can_join checks for +i key, bans.
231 */
232 if ((i = can_join(source_p, chptr, key)))
233 {
234 sendto_one(source_p, form_str(i), me.name,
235 source_p->name, chptr->chname);
236 continue;
237 }
238
239 add_user_to_channel(chptr, source_p, flags, YES);
240
241 /*
242 * Set timestamp if appropriate, and propagate
243 */
244 if (flags & CHFL_CHANOP)
245 {
246 chptr->channelts = CurrentTime;
247 chptr->mode.mode |= MODE_TOPICLIMIT;
248 chptr->mode.mode |= MODE_NOPRIVMSGS;
249
250 sendto_server(client_p, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
251 ":%s SJOIN %lu %s +nt :@%s",
252 me.id, (unsigned long)chptr->channelts,
253 chptr->chname, source_p->id);
254 sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6, LL_ICLIENT,
255 ":%s SJOIN %lu %s +nt :@%s",
256 me.name, (unsigned long)chptr->channelts,
257 chptr->chname, source_p->name);
258 /*
259 * notify all other users on the new channel
260 */
261 sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
262 source_p->name, source_p->username,
263 source_p->host, chptr->chname);
264 sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s +nt",
265 me.name, chptr->chname);
266 }
267 else
268 {
269 sendto_server(client_p, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
270 ":%s JOIN %lu %s +",
271 source_p->id, (unsigned long)chptr->channelts,
272 chptr->chname);
273 sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6, LL_ICLIENT,
274 ":%s SJOIN %lu %s + :%s",
275 me.name, (unsigned long)chptr->channelts,
276 chptr->chname, source_p->name);
277
278 sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
279 source_p->name, source_p->username,
280 source_p->host, chptr->chname);
281 }
282
283 del_invite(chptr, source_p);
284
285 if (chptr->topic != NULL)
286 {
287 sendto_one(source_p, form_str(RPL_TOPIC), me.name,
288 source_p->name, chptr->chname, chptr->topic);
289
290 sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
291 me.name, source_p->name, chptr->chname,
292 chptr->topic_info, chptr->topic_time);
293 }
294
295 channel_member_names(source_p, chptr, 1);
296
297 source_p->localClient->last_join_time = CurrentTime;
298 }
299 }
300
301 /* ms_join()
302 *
303 * inputs - parv[0] = uid
304 * parv[1] = ts
305 * parv[2] = channel name
306 * parv[3] = modes (Deprecated)
307 * output - none
308 * side effects - handles remote JOIN's sent by servers. In TSora
309 * remote clients are joined using SJOIN, hence a
310 * JOIN sent by a server on behalf of a client is an error.
311 * here, the initial code is in to take an extra parameter
312 * and use it for the TimeStamp on a new channel.
313 */
314 static void
315 ms_join(struct Client *client_p, struct Client *source_p,
316 int parc, char *parv[])
317 {
318 time_t newts = 0;
319 time_t oldts = 0;
320 int args = 0;
321 int keep_our_modes = 1;
322 int keep_new_modes = 1;
323 int isnew = 0;
324 const char *servername = NULL;
325 struct Channel *chptr = NULL;
326 struct Mode mode, *oldmode;
327
328 if (parc == 2 && !irccmp(parv[1], "0"))
329 {
330 do_join_0(client_p, source_p);
331 return;
332 }
333
334 if (parc < 4 || *parv[2] == '&')
335 return;
336
337 if (!check_channel_name(parv[2], 0))
338 {
339 sendto_realops_flags(UMODE_DEBUG, L_ALL,
340 "*** Too long or invalid channel name from %s: %s",
341 client_p->name, parv[2]);
342 return;
343 }
344
345 mbuf = modebuf;
346 mode.mode = mode.limit = 0;
347 mode.key[0] = '\0';
348
349 if ((chptr = hash_find_channel(parv[2])) == NULL)
350 {
351 isnew = 1;
352 chptr = make_channel(parv[2]);
353 }
354
355 newts = atol(parv[1]);
356 oldts = chptr->channelts;
357 oldmode = &chptr->mode;
358
359 if (ConfigFileEntry.ignore_bogus_ts)
360 {
361 if (newts < 800000000)
362 {
363 sendto_realops_flags(UMODE_DEBUG, L_ALL,
364 "*** Bogus TS %lu on %s ignored from %s",
365 (unsigned long)newts, chptr->chname,
366 client_p->name);
367
368 newts = (oldts == 0) ? 0 : 800000000;
369 }
370 }
371 else
372 {
373 if (!newts && !isnew && oldts)
374 {
375 sendto_channel_local(ALL_MEMBERS, NO, chptr,
376 ":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
377 me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
378 sendto_realops_flags(UMODE_ALL, L_ALL,
379 "Server %s changing TS on %s from %lu to 0",
380 source_p->name, chptr->chname, (unsigned long)oldts);
381 }
382 }
383
384 if (isnew)
385 chptr->channelts = newts;
386 else if (newts == 0 || oldts == 0)
387 chptr->channelts = 0;
388 else if (newts == oldts)
389 ;
390 else if (newts < oldts)
391 {
392 keep_our_modes = NO;
393 chptr->channelts = newts;
394 }
395 else
396 keep_new_modes = NO;
397
398 if (!keep_new_modes)
399 mode = *oldmode;
400 else if (keep_our_modes)
401 {
402 mode.mode |= oldmode->mode;
403 if (oldmode->limit > mode.limit)
404 mode.limit = oldmode->limit;
405 if (strcmp(mode.key, oldmode->key) < 0)
406 strcpy(mode.key, oldmode->key);
407 }
408
409 set_final_mode(&mode, oldmode);
410 chptr->mode = mode;
411
412 /* Lost the TS, other side wins, so remove modes on this side */
413 if (!keep_our_modes)
414 {
415 remove_our_modes(chptr, source_p);
416 sendto_channel_local(ALL_MEMBERS, NO, chptr,
417 ":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
418 me.name, chptr->chname, chptr->chname,
419 (unsigned long)oldts, (unsigned long)newts);
420 }
421
422 if (*modebuf != '\0')
423 {
424 servername = (ConfigServerHide.hide_servers || IsHidden(source_p)) ?
425 me.name : source_p->name;
426
427 /* This _SHOULD_ be to ALL_MEMBERS
428 * It contains only +imnpstlk, etc */
429 sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s",
430 servername, chptr->chname, modebuf, parabuf);
431 }
432
433 if (!IsMember(source_p, chptr))
434 {
435 add_user_to_channel(chptr, source_p, 0, YES);
436 sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
437 source_p->name, source_p->username,
438 source_p->host, chptr->chname);
439 }
440
441 sendto_server(client_p, NULL, chptr, CAP_TS6, NOCAPS, NOFLAGS,
442 ":%s JOIN %lu %s +",
443 ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
444 sendto_server(client_p, NULL, chptr, NOCAPS, CAP_TS6, NOFLAGS,
445 ":%s SJOIN %lu %s + :%s",
446 source_p->servptr->name, (unsigned long)chptr->channelts,
447 chptr->chname, source_p->name);
448 }
449
450 /* do_join_0()
451 *
452 * inputs - pointer to client doing join 0
453 * output - NONE
454 * side effects - Use has decided to join 0. This is legacy
455 * from the days when channels were numbers not names. *sigh*
456 * There is a bunch of evilness necessary here due to
457 * anti spambot code.
458 */
459 static void
460 do_join_0(struct Client *client_p, struct Client *source_p)
461 {
462 struct Channel *chptr = NULL;
463 dlink_node *ptr = NULL, *ptr_next = NULL;
464
465 if (source_p->channel.head && MyConnect(source_p) && !IsOper(source_p))
466 check_spambot_warning(source_p, NULL);
467
468 DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head)
469 {
470 chptr = ((struct Membership *)ptr->data)->chptr;
471
472 sendto_server(client_p, NULL, chptr, CAP_TS6, NOCAPS, NOFLAGS,
473 ":%s PART %s", ID(source_p), chptr->chname);
474 sendto_server(client_p, NULL, chptr, NOCAPS, CAP_TS6, NOFLAGS,
475 ":%s PART %s", source_p->name, chptr->chname);
476 sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s PART %s",
477 source_p->name, source_p->username,
478 source_p->host, chptr->chname);
479
480 remove_user_from_channel(ptr->data);
481 }
482 }
483
484 /* set_final_mode()
485 *
486 * inputs - pointer to mode to setup
487 * - pointer to old mode
488 * output - NONE
489 * side effects -
490 */
491 static const struct mode_letter
492 {
493 unsigned int mode;
494 unsigned char letter;
495 } flags[] = {
496 { MODE_NOPRIVMSGS, 'n' },
497 { MODE_TOPICLIMIT, 't' },
498 { MODE_SECRET, 's' },
499 { MODE_MODERATED, 'm' },
500 { MODE_INVITEONLY, 'i' },
501 { MODE_PRIVATE, 'p' },
502 { 0, '\0' }
503 };
504
505 static void
506 set_final_mode(struct Mode *mode, struct Mode *oldmode)
507 {
508 char *pbuf = parabuf;
509 int what = 0;
510 int len;
511 int i;
512
513 for (i = 0; flags[i].letter; i++)
514 {
515 if ((flags[i].mode & mode->mode) &&
516 !(flags[i].mode & oldmode->mode))
517 {
518 if (what != 1)
519 {
520 *mbuf++ = '+';
521 what = 1;
522 }
523 *mbuf++ = flags[i].letter;
524 }
525 }
526
527 for (i = 0; flags[i].letter; i++)
528 {
529 if ((flags[i].mode & oldmode->mode) &&
530 !(flags[i].mode & mode->mode))
531 {
532 if (what != -1)
533 {
534 *mbuf++ = '-';
535 what = -1;
536 }
537 *mbuf++ = flags[i].letter;
538 }
539 }
540
541 if (oldmode->limit != 0 && mode->limit == 0)
542 {
543 if (what != -1)
544 {
545 *mbuf++ = '-';
546 what = -1;
547 }
548 *mbuf++ = 'l';
549 }
550
551 if (oldmode->key[0] && !mode->key[0])
552 {
553 if (what != -1)
554 {
555 *mbuf++ = '-';
556 what = -1;
557 }
558 *mbuf++ = 'k';
559 len = ircsprintf(pbuf, "%s ", oldmode->key);
560 pbuf += len;
561 }
562
563 if (mode->limit != 0 && oldmode->limit != mode->limit)
564 {
565 if (what != 1)
566 {
567 *mbuf++ = '+';
568 what = 1;
569 }
570 *mbuf++ = 'l';
571 len = ircsprintf(pbuf, "%d ", mode->limit);
572 pbuf += len;
573 }
574
575 if (mode->key[0] && strcmp(oldmode->key, mode->key))
576 {
577 if (what != 1)
578 {
579 *mbuf++ = '+';
580 what = 1;
581 }
582 *mbuf++ = 'k';
583 len = ircsprintf(pbuf, "%s ", mode->key);
584 pbuf += len;
585 }
586 *mbuf = '\0';
587 }
588
589 /* remove_our_modes()
590 *
591 * inputs - pointer to channel to remove modes from
592 * - client pointer
593 * output - NONE
594 * side effects - Go through the local members, remove all their
595 * chanop modes etc., this side lost the TS.
596 */
597 static void
598 remove_our_modes(struct Channel *chptr, struct Client *source_p)
599 {
600 remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
601 #ifdef HALFOPS
602 remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
603 #endif
604 remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
605 }
606
607 /* remove_a_mode()
608 *
609 * inputs -
610 * output - NONE
611 * side effects - remove ONE mode from a channel
612 */
613 static void
614 remove_a_mode(struct Channel *chptr, struct Client *source_p,
615 int mask, char flag)
616 {
617 dlink_node *ptr;
618 struct Membership *ms;
619 char lmodebuf[MODEBUFLEN];
620 const char *lpara[MAXMODEPARAMS];
621 int count = 0;
622 int lcount;
623
624 mbuf = lmodebuf;
625 *mbuf++ = '-';
626
627 for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
628 lpara[lcount] = "";
629 sendbuf[0] = '\0';
630
631 DLINK_FOREACH(ptr, chptr->members.head)
632 {
633 ms = ptr->data;
634
635 if ((ms->flags & mask) == 0)
636 continue;
637
638 ms->flags &= ~mask;
639
640 lpara[count++] = ms->client_p->name;
641
642 *mbuf++ = flag;
643
644 if (count >= MAXMODEPARAMS)
645 {
646 for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
647 {
648 if (*lpara[lcount] == '\0')
649 break;
650
651 strlcat(sendbuf, " ", sizeof(sendbuf));
652 strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
653 lpara[lcount] = "";
654 }
655
656 *mbuf = '\0';
657 sendto_channel_local(ALL_MEMBERS, NO, chptr,
658 ":%s MODE %s %s%s",
659 (IsHidden(source_p) ||
660 ConfigServerHide.hide_servers) ?
661 me.name : source_p->name,
662 chptr->chname, lmodebuf, sendbuf);
663 mbuf = lmodebuf;
664 *mbuf++ = '-';
665 count = 0;
666 sendbuf[0] = '\0';
667 }
668 }
669
670 if (count != 0)
671 {
672 *mbuf = '\0';
673 for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
674 {
675 if (*lpara[lcount] == '\0')
676 break;
677
678 strlcat(sendbuf, " ", sizeof(sendbuf));
679 strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
680 }
681 sendto_channel_local(ALL_MEMBERS, NO, chptr,
682 ":%s MODE %s %s%s",
683 (IsHidden(source_p) || ConfigServerHide.hide_servers) ?
684 me.name : source_p->name,
685 chptr->chname, lmodebuf, sendbuf);
686 }
687 }
688

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