ViewVC Help
View File | Revision Log | Show Annotations | View Changeset | Root Listing
root/svn/ircd-hybrid/branches/8.2.x/src/channel.c
Revision: 572
Committed: Sun Apr 30 16:57:48 2006 UTC (17 years, 11 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid-7.2/src/channel.c
File size: 25197 byte(s)
Log Message:
- Backported changes made in HEAD to get rid of Channel::locmembers.
  This is mainly to save about 5megs of ram on networks like efnet where
  we have about 600k allocated Membership structures.

File Contents

# User Rev Content
1 adx 30 /*
2     * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3     *
4     * Copyright (C) 2002 by the past and present ircd coders, and others.
5     *
6     * This program is free software; you can redistribute it and/or modify
7     * it under the terms of the GNU General Public License as published by
8     * the Free Software Foundation; either version 2 of the License, or
9     * (at your option) any later version.
10     *
11     * This program is distributed in the hope that it will be useful,
12     * but WITHOUT ANY WARRANTY; without even the implied warranty of
13     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14     * GNU General Public License for more details.
15     *
16     * You should have received a copy of the GNU General Public License
17     * along with this program; if not, write to the Free Software
18     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19     * USA
20     */
21    
22     /*! \file channel.c
23     * \brief Responsible for managing channels, members, bans and topics
24 knight 31 * \version $Id$
25 adx 30 */
26    
27     #include "stdinc.h"
28     #include "tools.h"
29     #include "channel.h"
30     #include "channel_mode.h"
31     #include "client.h"
32     #include "common.h"
33     #include "hash.h"
34 michael 371 #include "hostmask.h"
35 adx 30 #include "irc_string.h"
36     #include "sprintf_irc.h"
37     #include "ircd.h"
38     #include "list.h"
39     #include "numeric.h"
40     #include "s_serv.h" /* captab */
41     #include "s_user.h"
42     #include "send.h"
43     #include "s_conf.h" /* ConfigFileEntry, ConfigChannel */
44     #include "event.h"
45     #include "memory.h"
46     #include "balloc.h"
47    
48     struct config_channel_entry ConfigChannel;
49     dlink_list global_channel_list = { NULL, NULL, 0 };
50     dlink_list lazylink_channels = { NULL, NULL, 0 };
51     BlockHeap *ban_heap; /*! \todo ban_heap shouldn't be a global var */
52    
53     static BlockHeap *topic_heap = NULL;
54     static BlockHeap *member_heap = NULL;
55     static BlockHeap *channel_heap = NULL;
56    
57     static char buf[IRCD_BUFSIZE];
58     static char modebuf[MODEBUFLEN];
59     static char parabuf[MODEBUFLEN];
60    
61    
62     /*! \brief Initializes the channel blockheap, adds known channel CAPAB
63     */
64     void
65     init_channels(void)
66     {
67     add_capability("EX", CAP_EX, 1);
68     add_capability("IE", CAP_IE, 1);
69     add_capability("CHW", CAP_CHW, 1);
70    
71     channel_heap = BlockHeapCreate("channel", sizeof(struct Channel), CHANNEL_HEAP_SIZE);
72     ban_heap = BlockHeapCreate("ban", sizeof(struct Ban), BAN_HEAP_SIZE);
73     topic_heap = BlockHeapCreate("topic", TOPICLEN+1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE);
74     member_heap = BlockHeapCreate("member", sizeof(struct Membership), CHANNEL_HEAP_SIZE*2);
75     }
76    
77     /*! \brief adds a user to a channel by adding another link to the
78     * channels member chain.
79     * \param chptr pointer to channel to add client to
80     * \param who pointer to client (who) to add
81     * \param flags flags for chanops etc
82     * \param flood_ctrl whether to count this join in flood calculations
83     */
84     void
85     add_user_to_channel(struct Channel *chptr, struct Client *who,
86     unsigned int flags, int flood_ctrl)
87     {
88     struct Membership *ms = NULL;
89    
90     if (GlobalSetOptions.joinfloodtime > 0)
91     {
92     if (flood_ctrl)
93     chptr->number_joined++;
94    
95     chptr->number_joined -= (CurrentTime - chptr->last_join_time) *
96     (((float)GlobalSetOptions.joinfloodcount) /
97     (float)GlobalSetOptions.joinfloodtime);
98    
99     if (chptr->number_joined <= 0)
100     {
101     chptr->number_joined = 0;
102     ClearJoinFloodNoticed(chptr);
103     }
104     else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount)
105     {
106     chptr->number_joined = GlobalSetOptions.joinfloodcount;
107    
108     if (!IsSetJoinFloodNoticed(chptr))
109     {
110     SetJoinFloodNoticed(chptr);
111     sendto_realops_flags(UMODE_BOTS, L_ALL,
112     "Possible Join Flooder %s on %s target: %s",
113     get_client_name(who, HIDE_IP),
114     who->servptr->name, chptr->chname);
115     }
116     }
117    
118     chptr->last_join_time = CurrentTime;
119     }
120    
121     ms = BlockHeapAlloc(member_heap);
122     ms->client_p = who;
123     ms->chptr = chptr;
124     ms->flags = flags;
125    
126     dlinkAdd(ms, &ms->channode, &chptr->members);
127     dlinkAdd(ms, &ms->usernode, &who->channel);
128     }
129    
130     /*! \brief deletes an user from a channel by removing a link in the
131     * channels member chain.
132     * \param member pointer to Membership struct
133     */
134     void
135     remove_user_from_channel(struct Membership *member)
136     {
137     struct Client *client_p = member->client_p;
138     struct Channel *chptr = member->chptr;
139    
140     dlinkDelete(&member->channode, &chptr->members);
141     dlinkDelete(&member->usernode, &client_p->channel);
142    
143     BlockHeapFree(member_heap, member);
144    
145     if (dlink_list_length(&chptr->members) == 0)
146     destroy_channel(chptr);
147     }
148    
149     /* send_members()
150     *
151     * inputs -
152     * output - NONE
153     * side effects -
154     */
155     static void
156     send_members(struct Client *client_p, struct Channel *chptr,
157     char *lmodebuf, char *lparabuf)
158     {
159     struct Membership *ms;
160     dlink_node *ptr;
161     int tlen; /* length of text to append */
162     char *t, *start; /* temp char pointer */
163    
164     start = t = buf + ircsprintf(buf, ":%s SJOIN %lu %s %s %s:",
165     ID_or_name(&me, client_p),
166     (unsigned long)chptr->channelts,
167     chptr->chname, lmodebuf, lparabuf);
168    
169     DLINK_FOREACH(ptr, chptr->members.head)
170     {
171     ms = ptr->data;
172    
173     tlen = strlen(IsCapable(client_p, CAP_TS6) ?
174     ID(ms->client_p) : ms->client_p->name) + 1; /* nick + space */
175    
176     if (ms->flags & CHFL_CHANOP)
177     tlen++;
178     #ifdef HALFOPS
179 adx 356 else if (ms->flags & CHFL_HALFOP)
180 adx 30 tlen++;
181     #endif
182     if (ms->flags & CHFL_VOICE)
183     tlen++;
184    
185     /* space will be converted into CR, but we also need space for LF..
186     * That's why we use '- 1' here
187     * -adx */
188     if (t + tlen - buf > sizeof(buf) - 1)
189     {
190     *(t - 1) = '\0'; /* kill the space and terminate the string */
191     sendto_one(client_p, "%s", buf);
192     t = start;
193     }
194    
195 adx 356 if ((ms->flags & (CHFL_CHANOP | CHFL_HALFOP)))
196     *t++ = (!(ms->flags & CHFL_CHANOP) && IsCapable(client_p, CAP_HOPS)) ?
197     '%' : '@';
198     if ((ms->flags & CHFL_VOICE))
199     *t++ = '+';
200 adx 30
201     if (IsCapable(client_p, CAP_TS6))
202     strcpy(t, ID(ms->client_p));
203     else
204     strcpy(t, ms->client_p->name);
205     t += strlen(t);
206     *t++ = ' ';
207     }
208    
209     /* should always be non-NULL unless we have a kind of persistent channels */
210     if (chptr->members.head != NULL)
211     t--; /* take the space out */
212     *t = '\0';
213     sendto_one(client_p, "%s", buf);
214     }
215    
216     /*! \brief sends +b/+e/+I
217     * \param client_p client pointer to server
218     * \param chptr pointer to channel
219     * \param top pointer to top of mode link list to send
220     * \param flag char flag flagging type of mode. Currently this can be 'b', e' or 'I'
221     */
222     static void
223     send_mode_list(struct Client *client_p, struct Channel *chptr,
224     dlink_list *top, char flag)
225     {
226     int ts5 = !IsCapable(client_p, CAP_TS6);
227     dlink_node *lp;
228     struct Ban *banptr;
229     char pbuf[IRCD_BUFSIZE];
230     int tlen, mlen, cur_len, count = 0;
231     char *mp = NULL, *pp = pbuf;
232    
233     if (top == NULL || top->length == 0)
234     return;
235    
236     if (ts5)
237     mlen = ircsprintf(buf, ":%s MODE %s +", me.name, chptr->chname);
238     else
239     mlen = ircsprintf(buf, ":%s BMASK %lu %s %c :", me.id,
240     (unsigned long)chptr->channelts, chptr->chname, flag);
241    
242     /* MODE needs additional one byte for space between buf and pbuf */
243     cur_len = mlen + ts5;
244     mp = buf + mlen;
245    
246     DLINK_FOREACH(lp, top->head)
247     {
248     banptr = lp->data;
249    
250     /* must add another b/e/I letter if we use MODE */
251     tlen = banptr->len + 3 + ts5;
252    
253     /*
254     * send buffer and start over if we cannot fit another ban,
255     * or if the target is non-ts6 and we have too many modes in
256     * in this line.
257     */
258     if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2 ||
259     (!IsCapable(client_p, CAP_TS6) &&
260     (count >= MAXMODEPARAMS || pp - pbuf >= MODEBUFLEN)))
261     {
262     *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
263     sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
264    
265     cur_len = mlen + ts5;
266     mp = buf + mlen;
267     pp = pbuf;
268     count = 0;
269     }
270    
271     count++;
272     if (ts5)
273     {
274     *mp++ = flag;
275     *mp = '\0';
276     }
277    
278     pp += ircsprintf(pp, "%s!%s@%s ", banptr->name, banptr->username,
279     banptr->host);
280     cur_len += tlen;
281     }
282    
283     *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
284     sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
285     }
286    
287     /*! \brief send "client_p" a full list of the modes for channel chptr
288     * \param client_p pointer to client client_p
289     * \param chptr pointer to channel pointer
290     */
291     void
292     send_channel_modes(struct Client *client_p, struct Channel *chptr)
293     {
294     if (chptr->chname[0] != '#')
295     return;
296    
297     *modebuf = *parabuf = '\0';
298     channel_modes(chptr, client_p, modebuf, parabuf);
299     send_members(client_p, chptr, modebuf, parabuf);
300    
301     send_mode_list(client_p, chptr, &chptr->banlist, 'b');
302    
303     if (IsCapable(client_p, CAP_EX))
304     send_mode_list(client_p, chptr, &chptr->exceptlist, 'e');
305     if (IsCapable(client_p, CAP_IE))
306     send_mode_list(client_p, chptr, &chptr->invexlist, 'I');
307     }
308    
309     /*! \brief check channel name for invalid characters
310     * \param name pointer to channel name string
311     * \return TRUE (1) if name ok, FALSE (0) otherwise
312     */
313     int
314     check_channel_name(const char *name)
315     {
316     const unsigned char *p = (const unsigned char *)name;
317     assert(name != NULL);
318    
319     for (; *p; ++p)
320     if (!IsChanChar(*p))
321     return 0;
322    
323     return 1;
324     }
325    
326     void
327     remove_ban(struct Ban *bptr, dlink_list *list)
328     {
329     dlinkDelete(&bptr->node, list);
330    
331     MyFree(bptr->name);
332     MyFree(bptr->username);
333     MyFree(bptr->host);
334     MyFree(bptr->who);
335    
336     BlockHeapFree(ban_heap, bptr);
337     }
338    
339     /* free_channel_list()
340     *
341     * inputs - pointer to dlink_list
342     * output - NONE
343     * side effects -
344     */
345     void
346     free_channel_list(dlink_list *list)
347     {
348     dlink_node *ptr = NULL, *next_ptr = NULL;
349    
350     DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
351     remove_ban(ptr->data, list);
352    
353     assert(list->tail == NULL && list->head == NULL);
354     }
355    
356     /*! \brief Get Channel block for chname (and allocate a new channel
357     * block, if it didn't exist before)
358     * \param client_p client pointer
359     * \param chname channel name
360     * \param isnew pointer to int flag whether channel was newly created or not
361     * \return channel block or NULL if illegal name
362     */
363     struct Channel *
364     get_or_create_channel(struct Client *client_p, const char *chname, int *isnew)
365     {
366     struct Channel *chptr = NULL;
367     int len;
368    
369     if (EmptyString(chname))
370     return NULL;
371    
372     if ((len = strlen(chname)) > CHANNELLEN)
373     {
374     if (IsServer(client_p))
375     sendto_realops_flags(UMODE_DEBUG, L_ALL,
376     "*** Long channel name from %s (%d > %d): %s",
377     client_p->name, len, CHANNELLEN, chname);
378     return NULL;
379     }
380    
381     if ((chptr = hash_find_channel(chname)) != NULL)
382     {
383     if (isnew != NULL)
384     *isnew = 0;
385    
386     return chptr;
387     }
388    
389     if (isnew != NULL)
390     *isnew = 1;
391    
392     chptr = BlockHeapAlloc(channel_heap);
393     /* doesn't hurt to set it here */
394     chptr->channelts = chptr->last_join_time = CurrentTime;
395    
396     strlcpy(chptr->chname, chname, sizeof(chptr->chname));
397     dlinkAdd(chptr, &chptr->node, &global_channel_list);
398    
399     hash_add_channel(chptr);
400    
401     return chptr;
402     }
403    
404     /*! \brief walk through this channel, and destroy it.
405     * \param chptr channel pointer
406     */
407     void
408     destroy_channel(struct Channel *chptr)
409     {
410     dlink_node *ptr = NULL, *ptr_next = NULL;
411    
412     DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head)
413     del_invite(chptr, ptr->data);
414    
415     /* free ban/exception/invex lists */
416     free_channel_list(&chptr->banlist);
417     free_channel_list(&chptr->exceptlist);
418     free_channel_list(&chptr->invexlist);
419    
420     /* Free the topic */
421     free_topic(chptr);
422    
423     dlinkDelete(&chptr->node, &global_channel_list);
424     hash_del_channel(chptr);
425    
426     if (ServerInfo.hub)
427     if ((ptr = dlinkFindDelete(&lazylink_channels, chptr)))
428     free_dlink_node(ptr);
429    
430     BlockHeapFree(channel_heap, chptr);
431     }
432    
433     /*!
434     * \param chptr pointer to channel
435     * \return string pointer "=" if public, "@" if secret else "*"
436     */
437     static const char *
438     channel_pub_or_secret(struct Channel *chptr)
439     {
440     if (SecretChannel(chptr))
441     return "@";
442     if (PrivateChannel(chptr))
443     return "*";
444     return "=";
445     }
446    
447     /*! \brief lists all names on given channel
448     * \param source_p pointer to client struct requesting names
449     * \param chptr pointer to channel block
450     * \param show_eon show ENDOFNAMES numeric or not
451     * (don't want it with /names with no params)
452     */
453     void
454     channel_member_names(struct Client *source_p, struct Channel *chptr,
455     int show_eon)
456     {
457     struct Client *target_p = NULL;
458     struct Membership *ms = NULL;
459     dlink_node *ptr = NULL;
460     char lbuf[IRCD_BUFSIZE + 1];
461     char *t = NULL, *start = NULL;
462     int tlen = 0;
463     int is_member = IsMember(source_p, chptr);
464 michael 503 int multi_prefix = (source_p->localClient->cap_active & CAP_MULTI_PREFIX) != 0;
465 adx 30
466     if (PubChannel(chptr) || is_member)
467     {
468     t = lbuf + ircsprintf(lbuf, form_str(RPL_NAMREPLY),
469     me.name, source_p->name,
470     channel_pub_or_secret(chptr),
471     chptr->chname);
472     start = t;
473    
474     DLINK_FOREACH(ptr, chptr->members.head)
475     {
476     ms = ptr->data;
477     target_p = ms->client_p;
478    
479     if (IsInvisible(target_p) && !is_member)
480     continue;
481    
482     tlen = strlen(target_p->name) + 1; /* nick + space */
483    
484 michael 506 if (!multi_prefix)
485     {
486     if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
487     ++tlen;
488     }
489     else
490     {
491     if (ms->flags & CHFL_CHANOP)
492     ++tlen;
493     if (ms->flags & CHFL_HALFOP)
494     ++tlen;
495     if (ms->flags & CHFL_VOICE)
496     ++tlen;
497     }
498    
499 adx 30 if (t + tlen - lbuf > IRCD_BUFSIZE)
500     {
501     *(t - 1) = '\0';
502     sendto_one(source_p, "%s", lbuf);
503     t = start;
504     }
505    
506 michael 503 t += ircsprintf(t, "%s%s ", get_member_status(ms, multi_prefix),
507 adx 30 target_p->name);
508     }
509    
510     if (tlen != 0)
511     {
512     *(t - 1) = '\0';
513     sendto_one(source_p, "%s", lbuf);
514     }
515     }
516    
517     if (show_eon)
518     sendto_one(source_p, form_str(RPL_ENDOFNAMES),
519     me.name, source_p->name, chptr->chname);
520     }
521    
522     /*! \brief adds client to invite list
523     * \param chptr pointer to channel block
524     * \param who pointer to client to add invite to
525     */
526     void
527     add_invite(struct Channel *chptr, struct Client *who)
528     {
529     del_invite(chptr, who);
530    
531     /*
532     * delete last link in chain if the list is max length
533     */
534 michael 317 if (dlink_list_length(&who->localClient->invited) >=
535 adx 30 ConfigChannel.max_chans_per_user)
536 michael 317 del_invite(who->localClient->invited.tail->data, who);
537 adx 30
538     /* add client to channel invite list */
539     dlinkAdd(who, make_dlink_node(), &chptr->invites);
540    
541     /* add channel to the end of the client invite list */
542 michael 317 dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited);
543 adx 30 }
544    
545     /*! \brief Delete Invite block from channel invite list
546     * and client invite list
547     * \param chptr pointer to Channel struct
548     * \param who pointer to client to remove invites from
549     */
550     void
551     del_invite(struct Channel *chptr, struct Client *who)
552     {
553     dlink_node *ptr = NULL;
554    
555 michael 317 if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr)))
556 adx 30 free_dlink_node(ptr);
557    
558     if ((ptr = dlinkFindDelete(&chptr->invites, who)))
559     free_dlink_node(ptr);
560     }
561    
562     /* get_member_status()
563     *
564     * inputs - pointer to struct Membership
565     * - YES if we can combine different flags
566     * output - string either @, +, % or "" depending on whether
567     * chanop, voiced or user
568     * side effects -
569     *
570     * NOTE: Returned string is usually a static buffer
571     * (like in get_client_name)
572     */
573     const char *
574     get_member_status(const struct Membership *ms, int combine)
575     {
576     static char buffer[4];
577     char *p = NULL;
578    
579     if (ms == NULL)
580     return "";
581     p = buffer;
582    
583     if (ms->flags & CHFL_CHANOP)
584     {
585     if (!combine)
586     return "@";
587     *p++ = '@';
588     }
589    
590     #ifdef HALFOPS
591     if (ms->flags & CHFL_HALFOP)
592     {
593     if (!combine)
594     return "%";
595     *p++ = '%';
596     }
597     #endif
598    
599     if (ms->flags & CHFL_VOICE)
600     *p++ = '+';
601     *p = '\0';
602    
603     return buffer;
604     }
605    
606     /*!
607     * \param who pointer to Client to check
608     * \param list pointer to ban list to search
609     * \return 1 if ban found for given n!u\@h mask, 0 otherwise
610     *
611     */
612     static int
613     find_bmask(const struct Client *who, const dlink_list *const list)
614     {
615     const dlink_node *ptr = NULL;
616    
617     DLINK_FOREACH(ptr, list->head)
618     {
619 michael 371 struct Ban *bp = ptr->data;
620 adx 30
621 michael 371 if (match(bp->name, who->name) && match(bp->username, who->username))
622     {
623     switch (bp->type)
624     {
625     case HM_HOST:
626     if (match(bp->host, who->host) || match(bp->host, who->sockhost))
627     return 1;
628     break;
629     case HM_IPV4:
630     if (who->localClient->aftype == AF_INET)
631     if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits))
632     return 1;
633     break;
634     #ifdef IPV6
635     case HM_IPV6:
636     if (who->localClient->aftype == AF_INET6)
637     if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits))
638     return 1;
639     break;
640     #endif
641     default:
642     assert(0);
643     }
644     }
645 adx 30 }
646    
647     return 0;
648     }
649    
650     /*!
651     * \param chptr pointer to channel block
652     * \param who pointer to client to check access fo
653     * \return 0 if not banned, 1 otherwise
654     */
655     int
656     is_banned(struct Channel *chptr, struct Client *who)
657     {
658     assert(IsClient(who));
659    
660     return find_bmask(who, &chptr->banlist) && (!ConfigChannel.use_except ||
661     !find_bmask(who, &chptr->exceptlist));
662     }
663    
664     /*!
665     * \param source_p pointer to client attempting to join
666     * \param chptr pointer to channel
667     * \param key key sent by client attempting to join if present
668     * \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL
669     * or 0 if allowed to join.
670     */
671     int
672     can_join(struct Client *source_p, struct Channel *chptr, const char *key)
673     {
674     if (find_bmask(source_p, &chptr->banlist))
675     if (!ConfigChannel.use_except || !find_bmask(source_p, &chptr->exceptlist))
676     return ERR_BANNEDFROMCHAN;
677    
678     if (chptr->mode.mode & MODE_INVITEONLY)
679 michael 317 if (!dlinkFind(&source_p->localClient->invited, chptr))
680 adx 30 if (!ConfigChannel.use_invex || !find_bmask(source_p, &chptr->invexlist))
681     return ERR_INVITEONLYCHAN;
682    
683     if (chptr->mode.key[0] && (EmptyString(key) || irccmp(chptr->mode.key, key)))
684     return ERR_BADCHANNELKEY;
685    
686     if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
687     chptr->mode.limit)
688     return ERR_CHANNELISFULL;
689    
690     return 0;
691     }
692    
693     int
694     has_member_flags(struct Membership *ms, unsigned int flags)
695     {
696     if (ms != NULL)
697     return ms->flags & flags;
698     return 0;
699     }
700    
701     struct Membership *
702     find_channel_link(struct Client *client_p, struct Channel *chptr)
703     {
704     dlink_node *ptr = NULL;
705    
706     if (!IsClient(client_p))
707     return NULL;
708    
709     DLINK_FOREACH(ptr, client_p->channel.head)
710     if (((struct Membership *)ptr->data)->chptr == chptr)
711     return (struct Membership *)ptr->data;
712    
713     return NULL;
714     }
715    
716     /*!
717     * \param chptr pointer to Channel struct
718     * \param source_p pointer to Client struct
719 michael 454 * \param ms pointer to Membership struct (can be NULL)
720 adx 30 * \return CAN_SEND_OPV if op or voiced on channel\n
721     * CAN_SEND_NONOP if can send to channel but is not an op\n
722     * CAN_SEND_NO if they cannot send to channel\n
723     */
724     int
725 michael 454 can_send(struct Channel *chptr, struct Client *source_p, struct Membership *ms)
726 adx 30 {
727     if (IsServer(source_p))
728     return CAN_SEND_OPV;
729    
730 michael 565 if (MyClient(source_p) && !IsExemptResv(source_p))
731 michael 567 if (!(IsOper(source_p) && ConfigFileEntry.oper_pass_resv))
732     if (!hash_find_resv(chptr->chname) == ConfigChannel.restrict_channels)
733 michael 565 return CAN_SEND_NO;
734 adx 30
735 michael 454 if (ms != NULL || (ms = find_channel_link(source_p, chptr)))
736 adx 30 {
737     if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE))
738     return CAN_SEND_OPV;
739    
740     /* cache can send if quiet_on_ban and banned */
741     if (ConfigChannel.quiet_on_ban && MyClient(source_p))
742     {
743     if (ms->flags & CHFL_BAN_SILENCED)
744     return CAN_SEND_NO;
745    
746     if (!(ms->flags & CHFL_BAN_CHECKED))
747     {
748     if (is_banned(chptr, source_p))
749     {
750     ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED);
751     return CAN_SEND_NO;
752     }
753    
754     ms->flags |= CHFL_BAN_CHECKED;
755     }
756     }
757     }
758 michael 456 else if (chptr->mode.mode & MODE_NOPRIVMSGS)
759     return CAN_SEND_NO;
760 adx 30
761 michael 456 if (chptr->mode.mode & MODE_MODERATED)
762 adx 30 return CAN_SEND_NO;
763    
764     return CAN_SEND_NONOP;
765     }
766    
767     /*! \brief Updates the client's oper_warn_count_down, warns the
768     * IRC operators if necessary, and updates
769     * join_leave_countdown as needed.
770     * \param source_p pointer to struct Client to check
771     * \param name channel name or NULL if this is a part.
772     */
773     void
774     check_spambot_warning(struct Client *source_p, const char *name)
775     {
776     int t_delta = 0;
777     int decrement_count = 0;
778    
779     if ((GlobalSetOptions.spam_num &&
780     (source_p->localClient->join_leave_count >=
781     GlobalSetOptions.spam_num)))
782     {
783     if (source_p->localClient->oper_warn_count_down > 0)
784     source_p->localClient->oper_warn_count_down--;
785     else
786     source_p->localClient->oper_warn_count_down = 0;
787    
788     if (source_p->localClient->oper_warn_count_down == 0)
789     {
790     /* Its already known as a possible spambot */
791     if (name != NULL)
792     sendto_realops_flags(UMODE_BOTS, L_ALL,
793     "User %s (%s@%s) trying to join %s is a possible spambot",
794     source_p->name, source_p->username,
795     source_p->host, name);
796     else
797     sendto_realops_flags(UMODE_BOTS, L_ALL,
798     "User %s (%s@%s) is a possible spambot",
799     source_p->name, source_p->username,
800     source_p->host);
801     source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
802     }
803     }
804     else
805     {
806     if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) >
807     JOIN_LEAVE_COUNT_EXPIRE_TIME)
808     {
809     decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
810     if (decrement_count > source_p->localClient->join_leave_count)
811     source_p->localClient->join_leave_count = 0;
812     else
813     source_p->localClient->join_leave_count -= decrement_count;
814     }
815     else
816     {
817     if ((CurrentTime - (source_p->localClient->last_join_time)) <
818     GlobalSetOptions.spam_time)
819     {
820     /* oh, its a possible spambot */
821     source_p->localClient->join_leave_count++;
822     }
823     }
824    
825     if (name != NULL)
826     source_p->localClient->last_join_time = CurrentTime;
827     else
828     source_p->localClient->last_leave_time = CurrentTime;
829     }
830     }
831    
832     /*! \brief compares usercount and servercount against their split
833     * values and adjusts splitmode accordingly
834     * \param unused Unused address pointer
835     */
836     void
837     check_splitmode(void *unused)
838     {
839     if (splitchecking && (ConfigChannel.no_join_on_split ||
840     ConfigChannel.no_create_on_split))
841     {
842     const unsigned int server = dlink_list_length(&global_serv_list);
843    
844     if (!splitmode && ((server < split_servers) || (Count.total < split_users)))
845     {
846     splitmode = 1;
847    
848     sendto_realops_flags(UMODE_ALL,L_ALL,
849     "Network split, activating splitmode");
850     eventAddIsh("check_splitmode", check_splitmode, NULL, 10);
851     }
852     else if (splitmode && (server > split_servers) && (Count.total > split_users))
853     {
854     splitmode = 0;
855    
856     sendto_realops_flags(UMODE_ALL, L_ALL,
857     "Network rejoined, deactivating splitmode");
858     eventDelete(check_splitmode, NULL);
859     }
860     }
861     }
862    
863     /*! \brief Allocates a new topic
864     * \param chptr Channel to allocate a new topic for
865     */
866     static void
867     allocate_topic(struct Channel *chptr)
868     {
869     void *ptr = NULL;
870    
871     if (chptr == NULL)
872     return;
873    
874     ptr = BlockHeapAlloc(topic_heap);
875    
876     /* Basically we allocate one large block for the topic and
877     * the topic info. We then split it up into two and shove it
878     * in the chptr
879     */
880     chptr->topic = ptr;
881     chptr->topic_info = (char *)ptr + TOPICLEN+1;
882     *chptr->topic = '\0';
883     *chptr->topic_info = '\0';
884     }
885    
886     void
887     free_topic(struct Channel *chptr)
888     {
889     void *ptr = NULL;
890     assert(chptr);
891     if (chptr->topic == NULL)
892     return;
893    
894     /*
895     * If you change allocate_topic you MUST change this as well
896     */
897     ptr = chptr->topic;
898     BlockHeapFree(topic_heap, ptr);
899     chptr->topic = NULL;
900     chptr->topic_info = NULL;
901     }
902    
903     /*! \brief Sets the channel topic for chptr
904     * \param chptr Pointer to struct Channel
905     * \param topic The topic string
906     * \param topic_info n!u\@h formatted string of the topic setter
907     * \param topicts timestamp on the topic
908     */
909     void
910     set_channel_topic(struct Channel *chptr, const char *topic,
911     const char *topic_info, time_t topicts)
912     {
913     if (!EmptyString(topic))
914     {
915     if (chptr->topic == NULL)
916     allocate_topic(chptr);
917    
918     strlcpy(chptr->topic, topic, TOPICLEN+1);
919     strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN);
920     chptr->topic_time = topicts;
921     }
922     else
923     {
924 michael 337 /*
925     * Do not reset chptr->topic_time here, it's required for
926     * bursting topics properly.
927     */
928 adx 30 if (chptr->topic != NULL)
929     free_topic(chptr);
930     }
931     }

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision