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1.1 tomglok 1: /*
2: * ngIRCd -- The Next Generation IRC Daemon
3: * Copyright (c)2001-2014 Alexander Barton (alex@barton.de) and Contributors.
4: *
5: * This program is free software; you can redistribute it and/or modify
6: * it under the terms of the GNU General Public License as published by
7: * the Free Software Foundation; either version 2 of the License, or
8: * (at your option) any later version.
9: * Please read the file COPYING, README and AUTHORS for more information.
10: */
11:
12: #define __channel_c__
13:
14: #include "portab.h"
15:
16: /**
17: * @file
18: * Channel management
19: */
20:
21: #include <assert.h>
22: #include <stdlib.h>
23: #include <string.h>
24: #include <errno.h>
25: #include <stdio.h>
26: #include <strings.h>
27: #include <time.h>
28:
29: #include "conn-func.h"
30:
31: #include "channel.h"
32:
33: #include "irc-write.h"
34: #include "conf.h"
35: #include "hash.h"
36: #include "log.h"
37: #include "messages.h"
38: #include "match.h"
39: #include "parse.h"
40: #include "irc-mode.h"
41:
42: #define REMOVE_PART 0
43: #define REMOVE_QUIT 1
44: #define REMOVE_KICK 2
45:
46: static CHANNEL *My_Channels;
47: static CL2CHAN *My_Cl2Chan;
48:
49: static CL2CHAN *Get_Cl2Chan PARAMS(( CHANNEL *Chan, CLIENT *Client ));
50: static CL2CHAN *Add_Client PARAMS(( CHANNEL *Chan, CLIENT *Client ));
51: static bool Remove_Client PARAMS(( int Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, const char *Reason, bool InformServer ));
52: static CL2CHAN *Get_First_Cl2Chan PARAMS(( CLIENT *Client, CHANNEL *Chan ));
53: static CL2CHAN *Get_Next_Cl2Chan PARAMS(( CL2CHAN *Start, CLIENT *Client, CHANNEL *Chan ));
54: static void Delete_Channel PARAMS(( CHANNEL *Chan ));
55: static void Free_Channel PARAMS(( CHANNEL *Chan ));
56: static void Set_KeyFile PARAMS((CHANNEL *Chan, const char *KeyFile));
57:
58:
59: GLOBAL void
60: Channel_Init( void )
61: {
62: My_Channels = NULL;
63: My_Cl2Chan = NULL;
64: } /* Channel_Init */
65:
66:
67: GLOBAL struct list_head *
68: Channel_GetListBans(CHANNEL *c)
69: {
70: assert(c != NULL);
71: return &c->list_bans;
72: }
73:
74:
75: GLOBAL struct list_head *
76: Channel_GetListExcepts(CHANNEL *c)
77: {
78: assert(c != NULL);
79: return &c->list_excepts;
80: }
81:
82:
83: GLOBAL struct list_head *
84: Channel_GetListInvites(CHANNEL *c)
85: {
86: assert(c != NULL);
87: return &c->list_invites;
88: }
89:
90:
91: /**
92: * Generate predefined persistent channels and &SERVER
93: */
94: GLOBAL void
95: Channel_InitPredefined( void )
96: {
97: CHANNEL *new_chan;
98: REQUEST Req;
99: const struct Conf_Channel *conf_chan;
100: char *c;
101: char modes[COMMAND_LEN], name[CHANNEL_NAME_LEN];
102: size_t i, n, channel_count = array_length(&Conf_Channels, sizeof(*conf_chan));
103:
104: conf_chan = array_start(&Conf_Channels);
105:
106: assert(channel_count == 0 || conf_chan != NULL);
107:
108: for (i = 0; i < channel_count; i++, conf_chan++) {
109: if (!conf_chan->name[0])
110: continue;
111: if (!Channel_IsValidName(conf_chan->name)) {
112: Log(LOG_ERR,
113: "Can't create pre-defined channel: invalid name: \"%s\"",
114: conf_chan->name);
115: continue;
116: }
117:
118: new_chan = Channel_Search(conf_chan->name);
119: if (new_chan) {
120: Log(LOG_INFO,
121: "Can't create pre-defined channel \"%s\": name already in use.",
122: conf_chan->name);
123: Set_KeyFile(new_chan, conf_chan->keyfile);
124: continue;
125: }
126:
127: new_chan = Channel_Create(conf_chan->name);
128: if (!new_chan) {
129: Log(LOG_ERR, "Can't create pre-defined channel \"%s\"!",
130: conf_chan->name);
131: continue;
132: }
133: Channel_ModeAdd(new_chan, 'P');
134:
135: if (conf_chan->topic[0])
136: Channel_SetTopic(new_chan, NULL, conf_chan->topic);
137:
138: /* Evaluate modes strings with fake requests */
139: if (conf_chan->modes_num) {
140: /* Prepare fake request structure */
141: strlcpy(name, conf_chan->name, sizeof(name));
142: Log(LOG_INFO, "Evaluating predefined channel modes for \"%s\".", name);
143: Req.argv[0] = name;
144: Req.prefix = Client_ID(Client_ThisServer());
145: Req.command = "MODE";
146:
147: /* Iterate over channel modes strings */
148: for (n = 0; n < conf_chan->modes_num; n++) {
149: Req.argc = 1;
150: strlcpy(modes, conf_chan->modes[n], sizeof(modes));
151: Log(LOG_DEBUG, "Evaluate \"MODE %s %s\".", name, modes);
152: c = strtok(modes, " ");
153: while (c && Req.argc < 15) {
154: Req.argv[Req.argc++] = c;
155: c = strtok(0, " ");
156: }
157:
158: if (Req.argc > 1) {
159: /* Handling of legacy "Key" and "MaxUsers" settings:
160: * Enforce setting the respective mode(s), to support
161: * the legacy "Mode = kl" notation, which was valid but
162: * is an invalid MODE string: key and limit are missing!
163: * So set them manually when "k" or "l" are detected in
164: * the first MODE parameter ... */
165: if (Req.argc > 1 && strchr(Req.argv[1], 'k')) {
166: Channel_SetKey(new_chan, conf_chan->key);
167: Channel_ModeAdd(new_chan, 'k');
168: }
169: if (strchr(Req.argv[1], 'l')) {
170: Channel_SetMaxUsers(new_chan, conf_chan->maxusers);
171: Channel_ModeAdd(new_chan, 'l');
172: }
173:
174: IRC_MODE(Client_ThisServer(), &Req);
175: }
176:
177: /* Original channel modes srings are no longer needed */
178: free(conf_chan->modes[n]);
179: }
180: }
181:
182: Set_KeyFile(new_chan, conf_chan->keyfile);
183:
184: Log(LOG_INFO,
185: "Created pre-defined channel \"%s\", mode \"%s\" (key \"%s\", limit %d).",
186: new_chan->name, new_chan->modes, new_chan->key,
187: new_chan->maxusers);
188: }
189: if (channel_count)
190: array_free(&Conf_Channels);
191:
192: /* Make sure the local &SERVER channel exists */
193: if (!Channel_Search("&SERVER")) {
194: new_chan = Channel_Create("&SERVER");
195: if (new_chan) {
196: Channel_SetModes(new_chan, "mnPt");
197: Channel_SetTopic(new_chan, Client_ThisServer(),
198: "Server Messages");
199: } else
200: Log(LOG_ERR, "Failed to create \"&SERVER\" channel!");
201: } else
202: LogDebug("Required channel \"&SERVER\" already exists, ok.");
203: } /* Channel_InitPredefined */
204:
205:
206: static void
207: Free_Channel(CHANNEL *chan)
208: {
209: array_free(&chan->topic);
210: array_free(&chan->keyfile);
211: Lists_Free(&chan->list_bans);
212: Lists_Free(&chan->list_excepts);
213: Lists_Free(&chan->list_invites);
214:
215: free(chan);
216: }
217:
218:
219: GLOBAL void
220: Channel_Exit( void )
221: {
222: CHANNEL *c, *c_next;
223: CL2CHAN *cl2chan, *cl2chan_next;
224:
225: /* free struct Channel */
226: c = My_Channels;
227: while (c) {
228: c_next = c->next;
229: Free_Channel(c);
230: c = c_next;
231: }
232:
233: /* Free Channel allocation table */
234: cl2chan = My_Cl2Chan;
235: while (cl2chan) {
236: cl2chan_next = cl2chan->next;
237: free(cl2chan);
238: cl2chan = cl2chan_next;
239: }
240: } /* Channel_Exit */
241:
242:
243: /**
244: * Join Channel
245: * This function lets a client join a channel. First, the function
246: * checks that the specified channel name is valid and that the client
247: * isn't already a member. If the specified channel doesn't exist,
248: * a new channel is created. Client is added to channel by function
249: * Add_Client().
250: */
251: GLOBAL bool
252: Channel_Join( CLIENT *Client, const char *Name )
253: {
254: CHANNEL *chan;
255:
256: assert(Client != NULL);
257: assert(Name != NULL);
258:
259: /* Check that the channel name is valid */
260: if (! Channel_IsValidName(Name)) {
261: IRC_WriteErrClient(Client, ERR_NOSUCHCHANNEL_MSG,
262: Client_ID(Client), Name);
263: return false;
264: }
265:
266: chan = Channel_Search(Name);
267: if(chan) {
268: /* Check if the client is already in the channel */
269: if (Get_Cl2Chan(chan, Client))
270: return false;
271: } else {
272: /* If the specified channel does not exist, the channel
273: * is now created */
274: chan = Channel_Create(Name);
275: if (!chan)
276: return false;
277: }
278:
279: /* Add user to Channel */
280: if (! Add_Client(chan, Client))
281: return false;
282:
283: return true;
284: } /* Channel_Join */
285:
286:
287: /**
288: * Part client from channel.
289: * This function lets a client part from a channel. First, the function checks
290: * if the channel exists and the client is a member of it and sends out
291: * appropriate error messages if not. The real work is done by the function
292: * Remove_Client().
293: */
294: GLOBAL bool
295: Channel_Part(CLIENT * Client, CLIENT * Origin, const char *Name, const char *Reason)
296: {
297: CHANNEL *chan;
298:
299: assert(Client != NULL);
300: assert(Name != NULL);
301: assert(Reason != NULL);
302:
303: /* Check that specified channel exists */
304: chan = Channel_Search(Name);
305: if (!chan) {
306: IRC_WriteErrClient(Client, ERR_NOSUCHCHANNEL_MSG,
307: Client_ID(Client), Name);
308: return false;
309: }
310:
311: /* Check that the client is in the channel */
312: if (!Get_Cl2Chan(chan, Client)) {
313: IRC_WriteErrClient(Client, ERR_NOTONCHANNEL_MSG,
314: Client_ID(Client), Name);
315: return false;
316: }
317:
318: if (Conf_MorePrivacy)
319: Reason = "";
320:
321: /* Part client from channel */
322: if (!Remove_Client(REMOVE_PART, chan, Client, Origin, Reason, true))
323: return false;
324: else
325: return true;
326: } /* Channel_Part */
327:
328:
329: /**
330: * Kick user from Channel
331: */
332: GLOBAL void
333: Channel_Kick(CLIENT *Peer, CLIENT *Target, CLIENT *Origin, const char *Name,
334: const char *Reason )
335: {
336: CHANNEL *chan;
337: bool can_kick = false;
338:
339: assert(Peer != NULL);
340: assert(Target != NULL);
341: assert(Origin != NULL);
342: assert(Name != NULL);
343: assert(Reason != NULL);
344:
345: /* Check that channel exists */
346: chan = Channel_Search( Name );
347: if (!chan) {
348: IRC_WriteErrClient(Origin, ERR_NOSUCHCHANNEL_MSG,
349: Client_ID(Origin), Name);
350: return;
351: }
352:
353: if (Client_Type(Peer) != CLIENT_SERVER &&
354: Client_Type(Origin) != CLIENT_SERVICE) {
355: /* Check that user is on the specified channel */
356: if (!Channel_IsMemberOf(chan, Origin)) {
357: IRC_WriteErrClient(Origin, ERR_NOTONCHANNEL_MSG,
358: Client_ID(Origin), Name);
359: return;
360: }
361: }
362:
363: /* Check that the client to be kicked is on the specified channel */
364: if (!Channel_IsMemberOf(chan, Target)) {
365: IRC_WriteErrClient(Origin, ERR_USERNOTINCHANNEL_MSG,
366: Client_ID(Origin), Client_ID(Target), Name );
367: return;
368: }
369:
370: if(Client_Type(Peer) == CLIENT_USER) {
371: /* Channel mode 'Q' and user mode 'q' on target: nobody but
372: * IRC Operators and servers can kick the target user */
373: if ((Channel_HasMode(chan, 'Q')
374: || Client_HasMode(Target, 'q')
375: || Client_Type(Target) == CLIENT_SERVICE)
376: && !Client_HasMode(Origin, 'o')) {
377: IRC_WriteErrClient(Origin, ERR_KICKDENY_MSG,
378: Client_ID(Origin), Name,
379: Client_ID(Target));
380: return;
381: }
382:
383: /* Check if client has the rights to kick target */
384:
385: /* Owner can kick everyone */
386: if (Channel_UserHasMode(chan, Peer, 'q'))
387: can_kick = true;
388:
389: /* Admin can't kick owner */
390: else if (Channel_UserHasMode(chan, Peer, 'a') &&
391: !Channel_UserHasMode(chan, Target, 'q'))
392: can_kick = true;
393:
394: /* Op can't kick owner | admin */
395: else if (Channel_UserHasMode(chan, Peer, 'o') &&
396: !Channel_UserHasMode(chan, Target, 'q') &&
397: !Channel_UserHasMode(chan, Target, 'a'))
398: can_kick = true;
399:
400: /* Half Op can't kick owner | admin | op */
401: else if (Channel_UserHasMode(chan, Peer, 'h') &&
402: !Channel_UserHasMode(chan, Target, 'q') &&
403: !Channel_UserHasMode(chan, Target, 'a') &&
404: !Channel_UserHasMode(chan, Target, 'o'))
405: can_kick = true;
406:
407: /* IRC operators & IRCd with OperCanMode enabled
408: * can kick anyways regardless of privilege */
409: else if(Client_HasMode(Origin, 'o') && Conf_OperCanMode)
410: can_kick = true;
411:
412: if(!can_kick) {
413: IRC_WriteErrClient(Origin, ERR_CHANOPPRIVTOOLOW_MSG,
414: Client_ID(Origin), Name);
415: return;
416: }
417: }
418:
419: /* Kick Client from channel */
420: Remove_Client( REMOVE_KICK, chan, Target, Origin, Reason, true);
421: } /* Channel_Kick */
422:
423:
424: GLOBAL void
425: Channel_Quit( CLIENT *Client, const char *Reason )
426: {
427: CHANNEL *c, *next_c;
428:
429: assert( Client != NULL );
430: assert( Reason != NULL );
431:
432: if (Conf_MorePrivacy)
433: Reason = "";
434:
435: IRC_WriteStrRelatedPrefix( Client, Client, false, "QUIT :%s", Reason );
436:
437: c = My_Channels;
438: while( c )
439: {
440: next_c = c->next;
441: Remove_Client( REMOVE_QUIT, c, Client, Client, Reason, false );
442: c = next_c;
443: }
444: } /* Channel_Quit */
445:
446:
447: /**
448: * Get number of channels this server knows and that are "visible" to
449: * the given client. If no client is given, all channels will be counted.
450: *
451: * @param Client The client to check or NULL.
452: * @return Number of channels visible to the client.
453: */
454: GLOBAL unsigned long
455: Channel_CountVisible (CLIENT *Client)
456: {
457: CHANNEL *c;
458: unsigned long count = 0;
459:
460: c = My_Channels;
461: while(c) {
462: if (Client) {
463: if (!Channel_HasMode(c, 's')
464: || Channel_IsMemberOf(c, Client))
465: count++;
466: } else
467: count++;
468: c = c->next;
469: }
470: return count;
471: }
472:
473:
474: GLOBAL unsigned long
475: Channel_MemberCount( CHANNEL *Chan )
476: {
477: CL2CHAN *cl2chan;
478: unsigned long count = 0;
479:
480: assert( Chan != NULL );
481:
482: cl2chan = My_Cl2Chan;
483: while( cl2chan )
484: {
485: if( cl2chan->channel == Chan ) count++;
486: cl2chan = cl2chan->next;
487: }
488: return count;
489: } /* Channel_MemberCount */
490:
491:
492: GLOBAL int
493: Channel_CountForUser( CLIENT *Client )
494: {
495: /* Count number of channels a user is member of. */
496:
497: CL2CHAN *cl2chan;
498: int count = 0;
499:
500: assert( Client != NULL );
501:
502: cl2chan = My_Cl2Chan;
503: while( cl2chan )
504: {
505: if( cl2chan->client == Client ) count++;
506: cl2chan = cl2chan->next;
507: }
508:
509: return count;
510: } /* Channel_CountForUser */
511:
512:
513: GLOBAL const char *
514: Channel_Name( const CHANNEL *Chan )
515: {
516: assert( Chan != NULL );
517: return Chan->name;
518: } /* Channel_Name */
519:
520:
521: GLOBAL char *
522: Channel_Modes( CHANNEL *Chan )
523: {
524: assert( Chan != NULL );
525: return Chan->modes;
526: } /* Channel_Modes */
527:
528:
529: GLOBAL bool
530: Channel_HasMode( CHANNEL *Chan, char Mode )
531: {
532: assert( Chan != NULL );
533: return strchr( Chan->modes, Mode ) != NULL;
534: } /* Channel_HasMode */
535:
536:
537: GLOBAL char *
538: Channel_Key( CHANNEL *Chan )
539: {
540: assert( Chan != NULL );
541: return Chan->key;
542: } /* Channel_Key */
543:
544:
545: GLOBAL unsigned long
546: Channel_MaxUsers( CHANNEL *Chan )
547: {
548: assert( Chan != NULL );
549: return Chan->maxusers;
550: } /* Channel_MaxUsers */
551:
552:
553: GLOBAL CHANNEL *
554: Channel_First( void )
555: {
556: return My_Channels;
557: } /* Channel_First */
558:
559:
560: GLOBAL CHANNEL *
561: Channel_Next( CHANNEL *Chan )
562: {
563: assert( Chan != NULL );
564: return Chan->next;
565: } /* Channel_Next */
566:
567:
568: GLOBAL CHANNEL *
569: Channel_Search( const char *Name )
570: {
571: /* Search channel structure */
572:
573: CHANNEL *c;
574: UINT32 search_hash;
575:
576: assert( Name != NULL );
577:
578: search_hash = Hash( Name );
579: c = My_Channels;
580: while( c )
581: {
582: if( search_hash == c->hash )
583: {
584: /* hash hit */
585: if( strcasecmp( Name, c->name ) == 0 ) return c;
586: }
587: c = c->next;
588: }
589: return NULL;
590: } /* Channel_Search */
591:
592:
593: GLOBAL CL2CHAN *
594: Channel_FirstMember( CHANNEL *Chan )
595: {
596: assert( Chan != NULL );
597: return Get_First_Cl2Chan( NULL, Chan );
598: } /* Channel_FirstMember */
599:
600:
601: GLOBAL CL2CHAN *
602: Channel_NextMember( CHANNEL *Chan, CL2CHAN *Cl2Chan )
603: {
604: assert( Chan != NULL );
605: assert( Cl2Chan != NULL );
606: return Get_Next_Cl2Chan( Cl2Chan->next, NULL, Chan );
607: } /* Channel_NextMember */
608:
609:
610: GLOBAL CL2CHAN *
611: Channel_FirstChannelOf( CLIENT *Client )
612: {
613: assert( Client != NULL );
614: return Get_First_Cl2Chan( Client, NULL );
615: } /* Channel_FirstChannelOf */
616:
617:
618: GLOBAL CL2CHAN *
619: Channel_NextChannelOf( CLIENT *Client, CL2CHAN *Cl2Chan )
620: {
621: assert( Client != NULL );
622: assert( Cl2Chan != NULL );
623: return Get_Next_Cl2Chan( Cl2Chan->next, Client, NULL );
624: } /* Channel_NextChannelOf */
625:
626:
627: GLOBAL CLIENT *
628: Channel_GetClient( CL2CHAN *Cl2Chan )
629: {
630: assert( Cl2Chan != NULL );
631: return Cl2Chan->client;
632: } /* Channel_GetClient */
633:
634:
635: GLOBAL CHANNEL *
636: Channel_GetChannel( CL2CHAN *Cl2Chan )
637: {
638: assert( Cl2Chan != NULL );
639: return Cl2Chan->channel;
640: } /* Channel_GetChannel */
641:
642:
643: GLOBAL bool
644: Channel_IsValidName( const char *Name )
645: {
646: assert( Name != NULL );
647:
648: #ifdef STRICT_RFC
649: if (strlen(Name) <= 1)
650: return false;
651: #endif
652: if (strchr("#&+", Name[0]) == NULL)
653: return false;
654: if (strlen(Name) >= CHANNEL_NAME_LEN)
655: return false;
656:
657: return Name[strcspn(Name, " ,:\007")] == 0;
658: } /* Channel_IsValidName */
659:
660:
661: GLOBAL bool
662: Channel_ModeAdd( CHANNEL *Chan, char Mode )
663: {
664: /* set Mode.
665: * If the channel already had this mode, return false.
666: * If the channel mode was newly set return true.
667: */
668:
669: char x[2];
670:
671: assert( Chan != NULL );
672:
673: x[0] = Mode; x[1] = '\0';
674: if( ! Channel_HasMode( Chan, x[0] ))
675: {
676: /* Channel does not have this mode yet, set it */
677: strlcat( Chan->modes, x, sizeof( Chan->modes ));
678: return true;
679: }
680: else return false;
681: } /* Channel_ModeAdd */
682:
683:
684: GLOBAL bool
685: Channel_ModeDel( CHANNEL *Chan, char Mode )
686: {
687: /* Delete mode.
688: * if the mode was removed return true.
689: * if the channel did not have the mode, return false.
690: */
691: char *p;
692:
693: assert( Chan != NULL );
694:
695: p = strchr( Chan->modes, Mode );
696: if( ! p ) return false;
697:
698: /* Channel has mode -> delete */
699: while( *p )
700: {
701: *p = *(p + 1);
702: p++;
703: }
704: return true;
705: } /* Channel_ModeDel */
706:
707:
708: GLOBAL bool
709: Channel_UserModeAdd( CHANNEL *Chan, CLIENT *Client, char Mode )
710: {
711: /* Set Channel-User-Mode.
712: * if mode was newly set, return true.
713: * if the User already had this channel-mode, return false.
714: */
715:
716: CL2CHAN *cl2chan;
717: char x[2];
718:
719: assert( Chan != NULL );
720: assert( Client != NULL );
721:
722: cl2chan = Get_Cl2Chan( Chan, Client );
723: assert( cl2chan != NULL );
724:
725: x[0] = Mode; x[1] = '\0';
726: if( ! strchr( cl2chan->modes, x[0] ))
727: {
728: /* mode not set, -> set it */
729: strlcat( cl2chan->modes, x, sizeof( cl2chan->modes ));
730: return true;
731: }
732: else return false;
733: } /* Channel_UserModeAdd */
734:
735:
736: GLOBAL bool
737: Channel_UserModeDel( CHANNEL *Chan, CLIENT *Client, char Mode )
738: {
739: /* Delete Channel-User-Mode.
740: * If Mode was removed, return true.
741: * If User did not have the Channel-Mode, return false.
742: */
743:
744: CL2CHAN *cl2chan;
745: char *p;
746:
747: assert( Chan != NULL );
748: assert( Client != NULL );
749:
750: cl2chan = Get_Cl2Chan( Chan, Client );
751: assert( cl2chan != NULL );
752:
753: p = strchr( cl2chan->modes, Mode );
754: if( ! p ) return false;
755:
756: /* Client has Mode -> delete */
757: while( *p )
758: {
759: *p = *(p + 1);
760: p++;
761: }
762: return true;
763: } /* Channel_UserModeDel */
764:
765:
766: GLOBAL char *
767: Channel_UserModes( CHANNEL *Chan, CLIENT *Client )
768: {
769: /* return Users' Channel-Modes */
770:
771: CL2CHAN *cl2chan;
772:
773: assert( Chan != NULL );
774: assert( Client != NULL );
775:
776: cl2chan = Get_Cl2Chan( Chan, Client );
777: assert( cl2chan != NULL );
778:
779: return cl2chan->modes;
780: } /* Channel_UserModes */
781:
782:
783: GLOBAL bool
784: Channel_UserHasMode( CHANNEL *Chan, CLIENT *Client, char Mode )
785: {
786: return strchr(Channel_UserModes(Chan, Client), Mode) != NULL;
787: } /* Channel_UserHasMode */
788:
789:
790: GLOBAL bool
791: Channel_IsMemberOf( CHANNEL *Chan, CLIENT *Client )
792: {
793: /* Test if Client is on Channel Chan */
794:
795: assert( Chan != NULL );
796: assert( Client != NULL );
797: return Get_Cl2Chan(Chan, Client) != NULL;
798: } /* Channel_IsMemberOf */
799:
800:
801: GLOBAL char *
802: Channel_Topic( CHANNEL *Chan )
803: {
804: char *ret;
805: assert( Chan != NULL );
806: ret = array_start(&Chan->topic);
807: return ret ? ret : "";
808: } /* Channel_Topic */
809:
810:
811: #ifndef STRICT_RFC
812:
813: GLOBAL unsigned int
814: Channel_TopicTime(CHANNEL *Chan)
815: {
816: assert(Chan != NULL);
817: return (unsigned int) Chan->topic_time;
818: } /* Channel_TopicTime */
819:
820:
821: GLOBAL char *
822: Channel_TopicWho(CHANNEL *Chan)
823: {
824: assert(Chan != NULL);
825: return Chan->topic_who;
826: } /* Channel_TopicWho */
827:
828:
829: GLOBAL unsigned int
830: Channel_CreationTime(CHANNEL *Chan)
831: {
832: assert(Chan != NULL);
833: return (unsigned int) Chan->creation_time;
834: } /* Channel_CreationTime */
835:
836: #endif
837:
838:
839: GLOBAL void
840: Channel_SetTopic(CHANNEL *Chan, CLIENT *Client, const char *Topic)
841: {
842: size_t len;
843: assert( Chan != NULL );
844: assert( Topic != NULL );
845:
846: len = strlen(Topic);
847: if (len < array_bytes(&Chan->topic))
848: array_free(&Chan->topic);
849:
850: if (len >= COMMAND_LEN || !array_copyb(&Chan->topic, Topic, len+1))
851: Log(LOG_WARNING, "could not set new Topic \"%s\" on %s: %s",
852: Topic, Chan->name, strerror(errno));
853: #ifndef STRICT_RFC
854: Chan->topic_time = time(NULL);
855: if (Client != NULL && Client_Type(Client) != CLIENT_SERVER)
856: strlcpy(Chan->topic_who, Client_ID(Client),
857: sizeof Chan->topic_who);
858: else
859: strlcpy(Chan->topic_who, DEFAULT_TOPIC_ID,
860: sizeof Chan->topic_who);
861: #else
862: (void) Client;
863: #endif
864: } /* Channel_SetTopic */
865:
866:
867: GLOBAL void
868: Channel_SetModes( CHANNEL *Chan, const char *Modes )
869: {
870: assert( Chan != NULL );
871: assert( Modes != NULL );
872:
873: strlcpy( Chan->modes, Modes, sizeof( Chan->modes ));
874: } /* Channel_SetModes */
875:
876:
877: GLOBAL void
878: Channel_SetKey( CHANNEL *Chan, const char *Key )
879: {
880: assert( Chan != NULL );
881: assert( Key != NULL );
882:
883: strlcpy( Chan->key, Key, sizeof( Chan->key ));
884: LogDebug("Channel %s: Key is now \"%s\".", Chan->name, Chan->key );
885: } /* Channel_SetKey */
886:
887:
888: GLOBAL void
889: Channel_SetMaxUsers(CHANNEL *Chan, unsigned long Count)
890: {
891: assert( Chan != NULL );
892:
893: Chan->maxusers = Count;
894: LogDebug("Channel %s: Member limit is now %lu.", Chan->name, Chan->maxusers );
895: } /* Channel_SetMaxUsers */
896:
897:
898: /**
899: * Check if a client is allowed to send to a specific channel.
900: *
901: * @param Chan The channel to check.
902: * @param From The client that wants to send.
903: * @return true if the client is allowed to send, false otherwise.
904: */
905: static bool
906: Can_Send_To_Channel(CHANNEL *Chan, CLIENT *From)
907: {
908: bool is_member, has_voice, is_halfop, is_op, is_chanadmin, is_owner;
909:
910: is_member = has_voice = is_halfop = is_op = is_chanadmin = is_owner = false;
911:
912: /* The server itself always can send messages :-) */
913: if (Client_ThisServer() == From)
914: return true;
915:
916: if (Channel_IsMemberOf(Chan, From)) {
917: is_member = true;
918: if (Channel_UserHasMode(Chan, From, 'v'))
919: has_voice = true;
920: if (Channel_UserHasMode(Chan, From, 'h'))
921: is_halfop = true;
922: if (Channel_UserHasMode(Chan, From, 'o'))
923: is_op = true;
924: if (Channel_UserHasMode(Chan, From, 'a'))
925: is_chanadmin = true;
926: if (Channel_UserHasMode(Chan, From, 'q'))
927: is_owner = true;
928: }
929:
930: /*
931: * Is the client allowed to write to channel?
932: *
933: * If channel mode n set: non-members cannot send to channel.
934: * If channel mode m set: need voice.
935: */
936: if (Channel_HasMode(Chan, 'n') && !is_member)
937: return false;
938:
939: if (Channel_HasMode(Chan, 'M') && !Client_HasMode(From, 'R')
940: && !Client_HasMode(From, 'o'))
941: return false;
942:
943: if (has_voice || is_halfop || is_op || is_chanadmin || is_owner)
944: return true;
945:
946: if (Channel_HasMode(Chan, 'm'))
947: return false;
948:
949: if (Lists_Check(&Chan->list_excepts, From))
950: return true;
951:
952: return !Lists_Check(&Chan->list_bans, From);
953: }
954:
955:
956: GLOBAL bool
957: Channel_Write(CHANNEL *Chan, CLIENT *From, CLIENT *Client, const char *Command,
958: bool SendErrors, const char *Text)
959: {
960: if (!Can_Send_To_Channel(Chan, From)) {
961: if (! SendErrors)
962: return CONNECTED; /* no error, see RFC 2812 */
963: if (Channel_HasMode(Chan, 'M'))
964: return IRC_WriteErrClient(From, ERR_NEEDREGGEDNICK_MSG,
965: Client_ID(From), Channel_Name(Chan));
966: else
967: return IRC_WriteErrClient(From, ERR_CANNOTSENDTOCHAN_MSG,
968: Client_ID(From), Channel_Name(Chan));
969: }
970:
971: if (Client_Conn(From) > NONE)
972: Conn_UpdateIdle(Client_Conn(From));
973:
974: IRC_WriteStrChannelPrefix(Client, Chan, From, true, "%s %s :%s",
975: Command, Channel_Name(Chan), Text);
976: return CONNECTED;
977: }
978:
979:
980: GLOBAL CHANNEL *
981: Channel_Create( const char *Name )
982: {
983: /* Create new CHANNEL structure and add it to linked list */
984: CHANNEL *c;
985:
986: assert( Name != NULL );
987:
988: c = (CHANNEL *)malloc( sizeof( CHANNEL ));
989: if( ! c )
990: {
991: Log( LOG_EMERG, "Can't allocate memory! [New_Chan]" );
992: return NULL;
993: }
994: memset( c, 0, sizeof( CHANNEL ));
995: strlcpy( c->name, Name, sizeof( c->name ));
996: c->hash = Hash( c->name );
997: c->next = My_Channels;
998: #ifndef STRICT_RFC
999: c->creation_time = time(NULL);
1000: #endif
1001: My_Channels = c;
1002: LogDebug("Created new channel structure for \"%s\".", Name);
1003: return c;
1004: } /* Channel_Create */
1005:
1006:
1007: static CL2CHAN *
1008: Get_Cl2Chan( CHANNEL *Chan, CLIENT *Client )
1009: {
1010: CL2CHAN *cl2chan;
1011:
1012: assert( Chan != NULL );
1013: assert( Client != NULL );
1014:
1015: cl2chan = My_Cl2Chan;
1016: while( cl2chan )
1017: {
1018: if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) return cl2chan;
1019: cl2chan = cl2chan->next;
1020: }
1021: return NULL;
1022: } /* Get_Cl2Chan */
1023:
1024:
1025: static CL2CHAN *
1026: Add_Client( CHANNEL *Chan, CLIENT *Client )
1027: {
1028: CL2CHAN *cl2chan;
1029:
1030: assert( Chan != NULL );
1031: assert( Client != NULL );
1032:
1033: /* Create new CL2CHAN structure */
1034: cl2chan = (CL2CHAN *)malloc( sizeof( CL2CHAN ));
1035: if( ! cl2chan )
1036: {
1037: Log( LOG_EMERG, "Can't allocate memory! [Add_Client]" );
1038: return NULL;
1039: }
1040: cl2chan->channel = Chan;
1041: cl2chan->client = Client;
1042: strcpy( cl2chan->modes, "" );
1043:
1044: /* concatenate */
1045: cl2chan->next = My_Cl2Chan;
1046: My_Cl2Chan = cl2chan;
1047:
1048: LogDebug("User \"%s\" joined channel \"%s\".", Client_Mask(Client), Chan->name);
1049:
1050: return cl2chan;
1051: } /* Add_Client */
1052:
1053:
1054: static bool
1055: Remove_Client( int Type, CHANNEL *Chan, CLIENT *Client, CLIENT *Origin, const char *Reason, bool InformServer )
1056: {
1057: CL2CHAN *cl2chan, *last_cl2chan;
1058: CHANNEL *c;
1059:
1060: assert( Chan != NULL );
1061: assert( Client != NULL );
1062: assert( Origin != NULL );
1063: assert( Reason != NULL );
1064:
1065: /* Do not inform other servers if the channel is local to this server,
1066: * regardless of what the caller requested! */
1067: if(InformServer)
1068: InformServer = !Channel_IsLocal(Chan);
1069:
1070: last_cl2chan = NULL;
1071: cl2chan = My_Cl2Chan;
1072: while( cl2chan )
1073: {
1074: if(( cl2chan->channel == Chan ) && ( cl2chan->client == Client )) break;
1075: last_cl2chan = cl2chan;
1076: cl2chan = cl2chan->next;
1077: }
1078: if( ! cl2chan ) return false;
1079:
1080: c = cl2chan->channel;
1081: assert( c != NULL );
1082:
1083: /* maintain cl2chan list */
1084: if( last_cl2chan ) last_cl2chan->next = cl2chan->next;
1085: else My_Cl2Chan = cl2chan->next;
1086: free( cl2chan );
1087:
1088: switch( Type )
1089: {
1090: case REMOVE_QUIT:
1091: /* QUIT: other servers have already been notified,
1092: * see Client_Destroy(); so only inform other clients
1093: * in same channel. */
1094: assert( InformServer == false );
1095: LogDebug("User \"%s\" left channel \"%s\" (%s).",
1096: Client_Mask( Client ), c->name, Reason );
1097: break;
1098: case REMOVE_KICK:
1099: /* User was KICKed: inform other servers (public
1100: * channels) and all users in the channel */
1101: if( InformServer )
1102: IRC_WriteStrServersPrefix( Client_NextHop( Origin ),
1103: Origin, "KICK %s %s :%s", c->name, Client_ID( Client ), Reason);
1104: IRC_WriteStrChannelPrefix(Client, c, Origin, false, "KICK %s %s :%s",
1105: c->name, Client_ID( Client ), Reason );
1106: if ((Client_Conn(Client) > NONE) &&
1107: (Client_Type(Client) == CLIENT_USER))
1108: {
1109: IRC_WriteStrClientPrefix(Client, Origin, "KICK %s %s :%s",
1110: c->name, Client_ID( Client ), Reason);
1111: }
1112: LogDebug("User \"%s\" has been kicked off \"%s\" by \"%s\": %s.",
1113: Client_Mask( Client ), c->name, Client_ID(Origin), Reason);
1114: break;
1115: default: /* PART */
1116: if (Conf_MorePrivacy)
1117: Reason = "";
1118:
1119: if (InformServer)
1120: IRC_WriteStrServersPrefix(Origin, Client, "PART %s :%s", c->name, Reason);
1121:
1122: IRC_WriteStrChannelPrefix(Origin, c, Client, false, "PART %s :%s",
1123: c->name, Reason);
1124:
1125: if ((Client_Conn(Origin) > NONE) &&
1126: (Client_Type(Origin) == CLIENT_USER))
1127: {
1128: IRC_WriteStrClientPrefix( Origin, Client, "PART %s :%s", c->name, Reason);
1129: LogDebug("User \"%s\" left channel \"%s\" (%s).",
1130: Client_Mask(Client), c->name, Reason);
1131: }
1132: }
1133:
1134: /* When channel is empty and is not pre-defined, delete */
1135: if( ! Channel_HasMode( Chan, 'P' ))
1136: {
1137: if( ! Get_First_Cl2Chan( NULL, Chan )) Delete_Channel( Chan );
1138: }
1139:
1140: return true;
1141: } /* Remove_Client */
1142:
1143:
1144: GLOBAL bool
1145: Channel_AddBan(CHANNEL *c, const char *mask, const char *who )
1146: {
1147: struct list_head *h = Channel_GetListBans(c);
1148: LogDebug("Adding \"%s\" to \"%s\" ban list", mask, Channel_Name(c));
1149: return Lists_Add(h, mask, time(NULL), who, false);
1150: }
1151:
1152:
1153: GLOBAL bool
1154: Channel_AddExcept(CHANNEL *c, const char *mask, const char *who )
1155: {
1156: struct list_head *h = Channel_GetListExcepts(c);
1157: LogDebug("Adding \"%s\" to \"%s\" exception list", mask, Channel_Name(c));
1158: return Lists_Add(h, mask, time(NULL), who, false);
1159: }
1160:
1161:
1162: GLOBAL bool
1163: Channel_AddInvite(CHANNEL *c, const char *mask, bool onlyonce, const char *who )
1164: {
1165: struct list_head *h = Channel_GetListInvites(c);
1166: LogDebug("Adding \"%s\" to \"%s\" invite list", mask, Channel_Name(c));
1167: return Lists_Add(h, mask, time(NULL), who, onlyonce);
1168: }
1169:
1170:
1171: static bool
1172: ShowChannelList(struct list_head *head, CLIENT *Client, CHANNEL *Channel,
1173: char *msg, char *msg_end)
1174: {
1175: struct list_elem *e;
1176:
1177: assert (Client != NULL);
1178: assert (Channel != NULL);
1179:
1180: e = Lists_GetFirst(head);
1181: while (e) {
1182: if (!IRC_WriteStrClient(Client, msg, Client_ID(Client),
1183: Channel_Name(Channel),
1184: Lists_GetMask(e),
1185: Lists_GetReason(e),
1186: Lists_GetValidity(e)))
1187: return DISCONNECTED;
1188: e = Lists_GetNext(e);
1189: }
1190:
1191: return IRC_WriteStrClient(Client, msg_end, Client_ID(Client),
1192: Channel_Name(Channel));
1193: }
1194:
1195:
1196: GLOBAL bool
1197: Channel_ShowBans( CLIENT *Client, CHANNEL *Channel )
1198: {
1199: struct list_head *h;
1200:
1201: assert( Channel != NULL );
1202:
1203: h = Channel_GetListBans(Channel);
1204: return ShowChannelList(h, Client, Channel, RPL_BANLIST_MSG,
1205: RPL_ENDOFBANLIST_MSG);
1206: }
1207:
1208:
1209: GLOBAL bool
1210: Channel_ShowExcepts( CLIENT *Client, CHANNEL *Channel )
1211: {
1212: struct list_head *h;
1213:
1214: assert( Channel != NULL );
1215:
1216: h = Channel_GetListExcepts(Channel);
1217: return ShowChannelList(h, Client, Channel, RPL_EXCEPTLIST_MSG,
1218: RPL_ENDOFEXCEPTLIST_MSG);
1219: }
1220:
1221:
1222: GLOBAL bool
1223: Channel_ShowInvites( CLIENT *Client, CHANNEL *Channel )
1224: {
1225: struct list_head *h;
1226:
1227: assert( Channel != NULL );
1228:
1229: h = Channel_GetListInvites(Channel);
1230: return ShowChannelList(h, Client, Channel, RPL_INVITELIST_MSG,
1231: RPL_ENDOFINVITELIST_MSG);
1232: }
1233:
1234:
1235: /**
1236: * Log a message to the local &SERVER channel, if it exists.
1237: */
1238: GLOBAL void
1239: Channel_LogServer(const char *msg)
1240: {
1241: CHANNEL *sc;
1242: CLIENT *c;
1243:
1244: assert(msg != NULL);
1245:
1246: sc = Channel_Search("&SERVER");
1247: if (!sc)
1248: return;
1249:
1250: c = Client_ThisServer();
1251: Channel_Write(sc, c, c, "PRIVMSG", false, msg);
1252: } /* Channel_LogServer */
1253:
1254:
1255: GLOBAL bool
1256: Channel_CheckKey(CHANNEL *Chan, CLIENT *Client, const char *Key)
1257: {
1258: char *file_name, line[COMMAND_LEN], *nick, *pass;
1259: FILE *fd;
1260:
1261: assert(Chan != NULL);
1262: assert(Client != NULL);
1263: assert(Key != NULL);
1264:
1265: if (!Channel_HasMode(Chan, 'k'))
1266: return true;
1267: if (*Key == '\0')
1268: return false;
1269: if (strcmp(Chan->key, Key) == 0)
1270: return true;
1271:
1272: file_name = array_start(&Chan->keyfile);
1273: if (!file_name)
1274: return false;
1275: fd = fopen(file_name, "r");
1276: if (!fd) {
1277: Log(LOG_ERR, "Can't open channel key file \"%s\" for %s: %s",
1278: file_name, Chan->name, strerror(errno));
1279: return false;
1280: }
1281:
1282: while (fgets(line, (int)sizeof(line), fd) != NULL) {
1283: ngt_TrimStr(line);
1284: if (! (nick = strchr(line, ':')))
1285: continue;
1286: *nick++ = '\0';
1287: if (!Match(line, Client_User(Client)))
1288: continue;
1289: if (! (pass = strchr(nick, ':')))
1290: continue;
1291: *pass++ = '\0';
1292: if (!Match(nick, Client_ID(Client)))
1293: continue;
1294: if (strcmp(Key, pass) != 0)
1295: continue;
1296:
1297: fclose(fd);
1298: return true;
1299: }
1300: fclose(fd);
1301: return false;
1302: } /* Channel_CheckKey */
1303:
1304:
1305: static CL2CHAN *
1306: Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan )
1307: {
1308: return Get_Next_Cl2Chan( My_Cl2Chan, Client, Chan );
1309: } /* Get_First_Cl2Chan */
1310:
1311:
1312: static CL2CHAN *
1313: Get_Next_Cl2Chan( CL2CHAN *Start, CLIENT *Client, CHANNEL *Channel )
1314: {
1315: CL2CHAN *cl2chan;
1316:
1317: assert( Client != NULL || Channel != NULL );
1318:
1319: cl2chan = Start;
1320: while( cl2chan )
1321: {
1322: if(( Client ) && ( cl2chan->client == Client )) return cl2chan;
1323: if(( Channel ) && ( cl2chan->channel == Channel )) return cl2chan;
1324: cl2chan = cl2chan->next;
1325: }
1326: return NULL;
1327: } /* Get_Next_Cl2Chan */
1328:
1329:
1330: /**
1331: * Remove a channel and free all of its data structures.
1332: */
1333: static void
1334: Delete_Channel(CHANNEL *Chan)
1335: {
1336: CHANNEL *chan, *last_chan;
1337:
1338: last_chan = NULL;
1339: chan = My_Channels;
1340: while (chan) {
1341: if (chan == Chan)
1342: break;
1343: last_chan = chan;
1344: chan = chan->next;
1345: }
1346:
1347: assert(chan != NULL);
1348: if (!chan)
1349: return;
1350:
1351: /* maintain channel list */
1352: if (last_chan)
1353: last_chan->next = chan->next;
1354: else
1355: My_Channels = chan->next;
1356:
1357: LogDebug("Freed channel structure for \"%s\".", Chan->name);
1358: Free_Channel(Chan);
1359: } /* Delete_Channel */
1360:
1361:
1362: static void
1363: Set_KeyFile(CHANNEL *Chan, const char *KeyFile)
1364: {
1365: size_t len;
1366:
1367: assert(Chan != NULL);
1368: assert(KeyFile != NULL);
1369:
1370: len = strlen(KeyFile);
1371: if (len < array_bytes(&Chan->keyfile)) {
1372: Log(LOG_INFO, "Channel key file of %s removed.", Chan->name);
1373: array_free(&Chan->keyfile);
1374: }
1375:
1376: if (len < 1)
1377: return;
1378:
1379: if (!array_copyb(&Chan->keyfile, KeyFile, len+1))
1380: Log(LOG_WARNING,
1381: "Could not set new channel key file \"%s\" for %s: %s",
1382: KeyFile, Chan->name, strerror(errno));
1383: else
1384: Log(LOG_INFO|LOG_snotice,
1385: "New local channel key file \"%s\" for %s activated.",
1386: KeyFile, Chan->name);
1387: } /* Set_KeyFile */
1388:
1389:
1390: /* -eof- */