2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
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.
11 * IRC commands for mode changes (MODE, AWAY, ...)
26 #include "irc-write.h"
37 static bool Client_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
39 static bool Channel_Mode PARAMS(( CLIENT *Client, REQUEST *Req, CLIENT *Origin,
42 static bool Add_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
43 CHANNEL *Channel, const char *Pattern));
44 static bool Del_Ban_Invite PARAMS((int what, CLIENT *Prefix, CLIENT *Client,
45 CHANNEL *Channel, const char *Pattern));
47 static bool Send_ListChange PARAMS((const char *Mode, CLIENT *Prefix,
48 CLIENT *Client, CHANNEL *Channel, const char *Mask));
52 IRC_MODE( CLIENT *Client, REQUEST *Req )
57 assert( Client != NULL );
58 assert( Req != NULL );
61 if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
63 /* Origin for answers */
64 if( Client_Type( Client ) == CLIENT_SERVER )
66 origin = Client_Search( Req->prefix );
67 if( ! origin ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
71 /* Channel or user mode? */
72 cl = NULL; chan = NULL;
73 if (Client_IsValidNick(Req->argv[0]))
74 cl = Client_Search(Req->argv[0]);
75 if (Channel_IsValidName(Req->argv[0]))
76 chan = Channel_Search(Req->argv[0]);
79 return Client_Mode(Client, Req, origin, cl);
81 return Channel_Mode(Client, Req, origin, chan);
83 /* No target found! */
84 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
85 Client_ID(Client), Req->argv[0]);
90 Client_Mode( CLIENT *Client, REQUEST *Req, CLIENT *Origin, CLIENT *Target )
92 /* Handle client mode requests */
94 char the_modes[COMMAND_LEN], x[2], *mode_ptr;
99 /* Is the client allowed to request or change the modes? */
100 if( Client_Type( Client ) == CLIENT_USER )
102 /* Users are only allowed to manipulate their own modes! */
103 if( Target != Client ) return IRC_WriteStrClient( Client, ERR_USERSDONTMATCH_MSG, Client_ID( Client ));
106 /* Mode request: let's answer it :-) */
107 if( Req->argc == 1 ) return IRC_WriteStrClient( Origin, RPL_UMODEIS_MSG, Client_ID( Origin ), Client_Modes( Target ));
110 mode_ptr = Req->argv[mode_arg];
112 /* Initial state: set or unset modes? */
113 if( *mode_ptr == '+' ) set = true;
114 else if( *mode_ptr == '-' ) set = false;
115 else return IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG_MSG, Client_ID( Origin ));
117 /* Prepare reply string */
118 if( set ) strcpy( the_modes, "+" );
119 else strcpy( the_modes, "-" );
128 /* Try next argument if there's any */
130 if( mode_arg < Req->argc ) mode_ptr = Req->argv[mode_arg];
138 if((( *mode_ptr == '+' ) && ( ! set )) || (( *mode_ptr == '-' ) && ( set )))
140 /* Action modifier ("+"/"-") must be changed ... */
141 len = strlen( the_modes ) - 1;
142 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' ))
144 /* Adjust last action modifier in result */
145 the_modes[len] = *mode_ptr;
149 /* Append modifier character to result string */
151 strlcat( the_modes, x, sizeof( the_modes ));
153 if( *mode_ptr == '+' ) set = true;
163 case 'i': /* Invisible */
164 case 's': /* Server messages */
165 case 'w': /* Wallops messages */
170 if( Client_Type( Client ) == CLIENT_SERVER )
173 Client_SetAway( Origin, DEFAULT_AWAY_MSG );
175 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
178 case 'c': /* Receive connect notices
179 * (only settable by IRC operators!) */
180 if(!set || Client_OperByMe(Origin)
181 || Client_Type(Client) == CLIENT_SERVER)
184 ok = IRC_WriteStrClient(Origin,
185 ERR_NOPRIVILEGES_MSG,
189 case 'o': /* IRC operator (only unsettable!) */
190 if(( ! set ) || ( Client_Type( Client ) == CLIENT_SERVER ))
192 Client_SetOperByMe( Target, false );
195 else ok = IRC_WriteStrClient( Origin, ERR_NOPRIVILEGES_MSG, Client_ID( Origin ));
198 case 'r': /* Restricted (only settable) */
199 if(( set ) || ( Client_Type( Client ) == CLIENT_SERVER )) x[0] = 'r';
200 else ok = IRC_WriteStrClient( Origin, ERR_RESTRICTED_MSG, Client_ID( Origin ));
203 case 'x': /* Cloak hostname */
204 if (Client_HasMode(Client, 'r'))
205 IRC_WriteStrClient(Origin,
213 Log( LOG_DEBUG, "Unknown mode \"%c%c\" from \"%s\"!?", set ? '+' : '-', *mode_ptr, Client_ID( Origin ));
214 if( Client_Type( Client ) != CLIENT_SERVER ) ok = IRC_WriteStrClient( Origin, ERR_UMODEUNKNOWNFLAG2_MSG, Client_ID( Origin ), set ? '+' : '-', *mode_ptr );
220 /* Is there a valid mode change? */
221 if( ! x[0] ) continue;
226 if( Client_ModeAdd( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
232 if( Client_ModeDel( Target, x[0] )) strlcat( the_modes, x, sizeof( the_modes ));
237 /* Are there changed modes? */
240 /* Remoce needless action modifier characters */
241 len = strlen( the_modes ) - 1;
242 if(( the_modes[len] == '+' ) || ( the_modes[len] == '-' )) the_modes[len] = '\0';
244 if( Client_Type( Client ) == CLIENT_SERVER )
246 /* Forward modes to other servers */
247 IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
251 /* Send reply to client and inform other servers */
252 ok = IRC_WriteStrClientPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
253 IRC_WriteStrServersPrefix( Client, Origin, "MODE %s :%s", Client_ID( Target ), the_modes );
255 LogDebug("%s \"%s\": Mode change, now \"%s\".",
256 Client_TypeText(Target), Client_Mask(Target),
257 Client_Modes(Target));
260 IRC_SetPenalty( Client, 1 );
266 Channel_Mode_Answer_Request(CLIENT *Origin, CHANNEL *Channel)
268 char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], argadd[CLIENT_PASS_LEN];
269 const char *mode_ptr;
271 /* Member or not? -- That's the question! */
272 if (!Channel_IsMemberOf(Channel, Origin))
273 return IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
274 Client_ID(Origin), Channel_Name(Channel), Channel_Modes(Channel));
276 /* The sender is a member: generate extended reply */
277 strlcpy(the_modes, Channel_Modes(Channel), sizeof(the_modes));
278 mode_ptr = the_modes;
284 snprintf(argadd, sizeof(argadd), " %lu", Channel_MaxUsers(Channel));
285 strlcat(the_args, argadd, sizeof(the_args));
288 strlcat(the_args, " ", sizeof(the_args));
289 strlcat(the_args, Channel_Key(Channel), sizeof(the_args));
295 strlcat(the_modes, the_args, sizeof(the_modes));
297 if (!IRC_WriteStrClient(Origin, RPL_CHANNELMODEIS_MSG,
298 Client_ID(Origin), Channel_Name(Channel),
302 if (!IRC_WriteStrClient(Origin, RPL_CREATIONTIME_MSG,
303 Client_ID(Origin), Channel_Name(Channel),
304 Channel_CreationTime(Channel)))
312 * Handle channel mode and channel-user mode changes
315 Channel_Mode(CLIENT *Client, REQUEST *Req, CLIENT *Origin, CHANNEL *Channel)
317 char the_modes[COMMAND_LEN], the_args[COMMAND_LEN], x[2],
318 argadd[CLIENT_PASS_LEN], *mode_ptr;
319 bool connected, set, skiponce, retval, onchannel;
320 bool modeok = true, use_servermode = false;
321 int mode_arg, arg_arg;
326 if (Channel_IsModeless(Channel))
327 return IRC_WriteStrClient(Client, ERR_NOCHANMODES_MSG,
328 Client_ID(Client), Channel_Name(Channel));
330 /* Mode request: let's answer it :-) */
332 return Channel_Mode_Answer_Request(Origin, Channel);
334 /* Is the user allowed to change modes? */
335 if (Client_Type(Client) == CLIENT_USER) {
336 /* Is the originating user on that channel? */
337 onchannel = Channel_IsMemberOf(Channel, Origin);
339 /* channel operator? */
341 strchr(Channel_UserModes(Channel, Origin), 'o')) {
343 } else if (Conf_OperCanMode) {
344 /* IRC-Operators can use MODE as well */
345 if (Client_OperByMe(Origin)) {
347 if (Conf_OperServerMode)
348 use_servermode = true; /* Change Origin to Server */
352 if (!onchannel && !modeok)
353 return IRC_WriteStrClient(Origin, ERR_NOTONCHANNEL_MSG,
354 Client_ID(Origin), Channel_Name(Channel));
358 mode_ptr = Req->argv[mode_arg];
359 if (Req->argc > mode_arg + 1)
360 arg_arg = mode_arg + 1;
364 /* Initial state: set or unset modes? */
378 /* Prepare reply string */
379 strcpy(the_modes, set ? "+" : "-");
383 connected = CONNECTED;
388 /* Try next argument if there's any */
389 if (arg_arg > mode_arg)
394 if (mode_arg >= Req->argc)
396 mode_ptr = Req->argv[mode_arg];
398 if (Req->argc > mode_arg + 1)
399 arg_arg = mode_arg + 1;
408 if (((*mode_ptr == '+') && !set)
409 || ((*mode_ptr == '-') && set)) {
410 /* Action modifier ("+"/"-") must be changed ... */
411 len = strlen(the_modes) - 1;
412 if (the_modes[len] == '+' || the_modes[len] == '-') {
413 /* Adjust last action modifier in result */
414 the_modes[len] = *mode_ptr;
416 /* Append modifier character to result string */
418 strlcat(the_modes, x, sizeof(the_modes));
420 set = *mode_ptr == '+';
425 /* Are there arguments left? */
426 if (arg_arg >= Req->argc)
434 /* --- Channel modes --- */
435 case 'i': /* Invite only */
436 case 'm': /* Moderated */
437 case 'n': /* Only members can write */
438 case 's': /* Secret channel */
439 case 't': /* Topic locked */
440 case 'z': /* Secure connections only */
444 connected = IRC_WriteStrClient(Origin,
445 ERR_CHANOPRIVSNEEDED_MSG,
446 Client_ID(Origin), Channel_Name(Channel));
448 case 'k': /* Channel key */
453 connected = IRC_WriteStrClient(Origin,
454 ERR_CHANOPRIVSNEEDED_MSG,
456 Channel_Name(Channel));
459 if (arg_arg > mode_arg) {
461 Channel_ModeDel(Channel, 'k');
462 Channel_SetKey(Channel,
464 strlcpy(argadd, Channel_Key(Channel),
468 connected = IRC_WriteStrClient(Origin,
469 ERR_CHANOPRIVSNEEDED_MSG,
471 Channel_Name(Channel));
473 Req->argv[arg_arg][0] = '\0';
476 connected = IRC_WriteStrClient(Origin,
477 ERR_NEEDMOREPARAMS_MSG,
478 Client_ID(Origin), Req->command);
482 case 'l': /* Member limit */
487 connected = IRC_WriteStrClient(Origin,
488 ERR_CHANOPRIVSNEEDED_MSG,
490 Channel_Name(Channel));
493 if (arg_arg > mode_arg) {
495 l = atol(Req->argv[arg_arg]);
496 if (l > 0 && l < 0xFFFF) {
497 Channel_ModeDel(Channel, 'l');
498 Channel_SetMaxUsers(Channel, l);
499 snprintf(argadd, sizeof(argadd),
504 connected = IRC_WriteStrClient(Origin,
505 ERR_CHANOPRIVSNEEDED_MSG,
507 Channel_Name(Channel));
509 Req->argv[arg_arg][0] = '\0';
512 connected = IRC_WriteStrClient(Origin,
513 ERR_NEEDMOREPARAMS_MSG,
514 Client_ID(Origin), Req->command);
518 case 'P': /* Persistent channel */
520 /* Only IRC operators are allowed to
521 * set the 'P' channel mode! */
522 if (set && !(Client_OperByMe(Client)
523 || Client_Type(Client) == CLIENT_SERVER))
524 connected = IRC_WriteStrClient(Origin,
525 ERR_NOPRIVILEGES_MSG,
530 connected = IRC_WriteStrClient(Origin,
531 ERR_CHANOPRIVSNEEDED_MSG,
533 Channel_Name(Channel));
535 /* --- Channel user modes --- */
536 case 'o': /* Channel operator */
537 case 'v': /* Voice */
538 if (arg_arg > mode_arg) {
540 client = Client_Search(Req->argv[arg_arg]);
544 connected = IRC_WriteStrClient(Client,
549 connected = IRC_WriteStrClient(Origin,
550 ERR_CHANOPRIVSNEEDED_MSG,
552 Channel_Name(Channel));
554 Req->argv[arg_arg][0] = '\0';
557 connected = IRC_WriteStrClient(Origin,
558 ERR_NEEDMOREPARAMS_MSG,
559 Client_ID(Origin), Req->command);
563 /* --- Channel lists --- */
564 case 'I': /* Invite lists */
565 case 'b': /* Ban lists */
566 if (arg_arg > mode_arg) {
570 ? Add_Ban_Invite(*mode_ptr, Origin,
573 : Del_Ban_Invite(*mode_ptr, Origin,
577 connected = IRC_WriteStrClient(Origin,
578 ERR_CHANOPRIVSNEEDED_MSG,
580 Channel_Name(Channel));
582 Req->argv[arg_arg][0] = '\0';
585 if (*mode_ptr == 'I')
586 Channel_ShowInvites(Origin, Channel);
588 Channel_ShowBans(Origin, Channel);
593 "Unknown mode \"%c%c\" from \"%s\" on %s!?",
594 set ? '+' : '-', *mode_ptr, Client_ID(Origin),
595 Channel_Name(Channel));
596 if (Client_Type(Client) != CLIENT_SERVER)
597 connected = IRC_WriteStrClient(Origin,
598 ERR_UMODEUNKNOWNFLAG2_MSG,
600 set ? '+' : '-', *mode_ptr);
608 /* Is there a valid mode change? */
612 /* Validate target client */
613 if (client && (!Channel_IsMemberOf(Channel, client))) {
614 if (!IRC_WriteStrClient
615 (Origin, ERR_USERNOTINCHANNEL_MSG,
616 Client_ID(Origin), Client_ID(client),
617 Channel_Name(Channel)))
624 /* Channel-User-Mode */
626 ? Channel_UserModeAdd(Channel, client, x[0])
627 : Channel_UserModeDel(Channel, client, x[0]);
629 strlcat(the_args, " ", sizeof(the_args));
630 strlcat(the_args, Client_ID(client),
632 strlcat(the_modes, x, sizeof(the_modes));
634 ("User \"%s\": Mode change on %s, now \"%s\"",
635 Client_Mask(client), Channel_Name(Channel),
636 Channel_UserModes(Channel, client));
641 ? Channel_ModeAdd(Channel, x[0])
642 : Channel_ModeDel(Channel, x[0]);
644 strlcat(the_modes, x, sizeof(the_modes));
645 LogDebug("Channel %s: Mode change, now \"%s\".",
646 Channel_Name(Channel),
647 Channel_Modes(Channel));
651 /* Are there additional arguments to add? */
653 strlcat(the_args, " ", sizeof(the_args));
654 strlcat(the_args, argadd, sizeof(the_args));
659 /* Are there changed modes? */
661 /* Clean up mode string */
662 len = strlen(the_modes) - 1;
663 if ((the_modes[len] == '+') || (the_modes[len] == '-'))
664 the_modes[len] = '\0';
666 if (Client_Type(Client) == CLIENT_SERVER) {
667 /* MODE requests for local channels from other servers
668 * are definitely invalid! */
669 if (Channel_IsLocal(Channel)) {
670 Log(LOG_ALERT, "Got remote MODE command for local channel!? Ignored.");
674 /* Forward mode changes to channel users and all the
675 * other remote servers: */
676 IRC_WriteStrServersPrefix(Client, Origin,
677 "MODE %s %s%s", Channel_Name(Channel),
678 the_modes, the_args);
679 IRC_WriteStrChannelPrefix(Client, Channel, Origin,
680 false, "MODE %s %s%s", Channel_Name(Channel),
681 the_modes, the_args);
684 Origin = Client_ThisServer();
685 /* Send reply to client and inform other servers and channel users */
686 connected = IRC_WriteStrClientPrefix(Client, Origin,
687 "MODE %s %s%s", Channel_Name(Channel),
688 the_modes, the_args);
689 /* Only forward requests for non-local channels */
690 if (!Channel_IsLocal(Channel))
691 IRC_WriteStrServersPrefix(Client, Origin,
692 "MODE %s %s%s", Channel_Name(Channel),
693 the_modes, the_args);
694 IRC_WriteStrChannelPrefix(Client, Channel, Origin,
695 false, "MODE %s %s%s", Channel_Name(Channel),
696 the_modes, the_args);
700 IRC_SetPenalty(Client, 1);
706 IRC_AWAY( CLIENT *Client, REQUEST *Req )
708 assert( Client != NULL );
709 assert( Req != NULL );
711 if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
713 if(( Req->argc == 1 ) && (Req->argv[0][0] ))
715 Client_SetAway( Client, Req->argv[0] );
716 Client_ModeAdd( Client, 'a' );
717 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :+a", Client_ID( Client ));
718 return IRC_WriteStrClient( Client, RPL_NOWAWAY_MSG, Client_ID( Client ));
722 Client_ModeDel( Client, 'a' );
723 IRC_WriteStrServersPrefix( Client, Client, "MODE %s :-a", Client_ID( Client ));
724 return IRC_WriteStrClient( Client, RPL_UNAWAY_MSG, Client_ID( Client ));
730 Add_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
736 assert( Client != NULL );
737 assert( Channel != NULL );
738 assert( Pattern != NULL );
739 assert(what == 'I' || what == 'b');
741 mask = Lists_MakeMask(Pattern);
743 already = Lists_CheckDupeMask(Channel_GetListInvites(Channel), mask);
746 ret = Channel_AddInvite(Channel, mask, false);
748 ret = Channel_AddBan(Channel, mask);
752 if (already && (Client_Type(Prefix) == CLIENT_SERVER))
756 return Send_ListChange("+I", Prefix, Client, Channel, mask);
757 return Send_ListChange("+b", Prefix, Client, Channel, mask);
762 Del_Ban_Invite(int what, CLIENT *Prefix, CLIENT *Client, CHANNEL *Channel, const char *Pattern)
765 struct list_head *list;
767 assert( Client != NULL );
768 assert( Channel != NULL );
769 assert( Pattern != NULL );
770 assert(what == 'I' || what == 'b');
772 mask = Lists_MakeMask( Pattern );
775 list = Channel_GetListInvites(Channel);
777 list = Channel_GetListBans(Channel);
779 Lists_Del(list, mask);
781 return Send_ListChange( "-I", Prefix, Client, Channel, mask );
782 return Send_ListChange( "-b", Prefix, Client, Channel, mask );
787 Send_ListChange(const char *Mode, CLIENT *Prefix, CLIENT *Client,
788 CHANNEL *Channel, const char *Mask)
792 if( Client_Type( Client ) == CLIENT_USER )
794 /* send confirmation to client */
795 ok = IRC_WriteStrClientPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
799 /* to other servers */
800 IRC_WriteStrServersPrefix( Client, Prefix, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
802 /* and local users in channel */
803 IRC_WriteStrChannelPrefix( Client, Channel, Prefix, false, "MODE %s %s %s", Channel_Name( Channel ), Mode, Mask );
806 } /* Send_ListChange */