1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
10 * Written by Craig Edwards, Craig McLure, and others.
11 * This program is free but copyrighted software; see
12 * the file COPYING for details.
14 * ---------------------------------------------------
19 #include "inspircd_config.h"
21 #include "configreader.h"
24 #include "connection.h"
27 #include "inspstring.h"
33 #include "modes/cmode_s.h"
35 #include "modes/cmode_p.h"
37 #include "modes/cmode_b.h"
39 #include "modes/cmode_m.h"
40 /* +t (only (half) ops can change topic) */
41 #include "modes/cmode_t.h"
42 /* +n (no external messages) */
43 #include "modes/cmode_n.h"
44 /* +i (invite only) */
45 #include "modes/cmode_i.h"
46 /* +k (keyed channel) */
47 #include "modes/cmode_k.h"
48 /* +l (channel user limit) */
49 #include "modes/cmode_l.h"
51 #include "modes/cmode_o.h"
52 /* +h (channel halfop) */
53 #include "modes/cmode_h.h"
54 /* +v (channel voice) */
55 #include "modes/cmode_v.h"
57 /* +s (server notices) */
58 #include "modes/umode_s.h"
59 /* +w (see wallops) */
60 #include "modes/umode_w.h"
62 #include "modes/umode_i.h"
64 #include "modes/umode_o.h"
65 /* +n (notice mask - our implementation of snomasks) */
66 #include "modes/umode_n.h"
68 ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix)
69 : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix)
73 ModeHandler::~ModeHandler()
77 bool ModeHandler::IsListMode()
82 unsigned int ModeHandler::GetPrefixRank()
87 ModeType ModeHandler::GetModeType()
92 bool ModeHandler::NeedsOper()
97 char ModeHandler::GetPrefix()
102 int ModeHandler::GetNumParams(bool adding)
104 return adding ? n_params_on : n_params_off;
107 char ModeHandler::GetModeChar()
112 ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)
114 return MODEACTION_DENY;
117 ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter)
121 return std::make_pair(dest->IsModeSet(this->mode), "");
125 return std::make_pair(channel->IsModeSet(this->mode), "");
129 void ModeHandler::DisplayList(userrec* user, chanrec* channel)
133 bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel)
135 return (ours < theirs);
138 ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type)
142 ModeWatcher::~ModeWatcher()
146 char ModeWatcher::GetModeChar()
151 ModeType ModeWatcher::GetModeType()
156 bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding, ModeType type)
161 void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter, bool adding, ModeType type)
165 userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status)
168 if ((!user) || (!dest) || (!chan) || (!*dest))
172 d = ServerInstance->FindNick(dest);
175 user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest);
181 const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK)
186 for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
188 ucrec* n = (ucrec*)(*i);
189 if (n->channel == chan)
191 if (n->uc_modes & MASK)
195 n->uc_modes = n->uc_modes | MASK;
199 n->channel->AddOppedUser(d);
202 n->channel->AddHalfoppedUser(d);
205 n->channel->AddVoicedUser(d);
208 ServerInstance->Log(DEBUG,"grant: %s %s",n->channel->name,d->nick);
215 const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK)
220 for (std::vector<ucrec*>::const_iterator i = d->chans.begin(); i != d->chans.end(); i++)
222 ucrec* n = (ucrec*)(*i);
223 if (n->channel == chan)
225 if ((n->uc_modes & MASK) == 0)
233 n->channel->DelOppedUser(d);
236 n->channel->DelHalfoppedUser(d);
239 n->channel->DelVoicedUser(d);
242 ServerInstance->Log(DEBUG,"revoke: %s %s",n->channel->name,d->nick);
249 void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text)
253 /* Display channel's current mode string */
254 user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user)));
255 user->WriteServ("329 %s %s %d", user->nick, targetchannel->name, targetchannel->created);
260 /* Display user's current mode string */
261 user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes());
262 user->WriteServ("008 %s :+%s", targetuser->nick, targetuser->FormatNoticeMasks());
266 /* No such nick/channel */
267 user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
271 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
273 std::string target = parameters[0];
274 ModeType type = MODETYPE_USER;
275 unsigned char mask = 0;
276 chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
277 userrec* targetuser = ServerInstance->FindNick(parameters[0]);
279 ServerInstance->Log(DEBUG,"ModeParser::Process start");
281 /* Special case for displaying the list for listmodes,
282 * e.g. MODE #chan b, or MODE #chan +b without a parameter
284 if ((targetchannel) && (pcnt == 2))
286 ServerInstance->Log(DEBUG,"Spool list");
287 const char* mode = parameters[1];
290 unsigned char handler_id = ((*mode) - 65) | MASK_CHANNEL;
291 ModeHandler* mh = modehandlers[handler_id];
292 if ((mh) && (mh->IsListMode()))
294 mh->DisplayList(user, targetchannel);
301 ServerInstance->Log(DEBUG,"Mode list request");
302 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
306 ServerInstance->Log(DEBUG,"More than one parameter");
310 type = MODETYPE_CHANNEL;
313 /* Extra security checks on channel modes
314 * (e.g. are they a (half)op?
317 if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
319 /* We don't have halfop */
320 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
322 /* Are we a uline or is it a servermode? */
323 if ((!ServerInstance->ULine(user->server)) && (!servermode))
325 /* Not enough permission:
326 * NOT a uline and NOT a servermode,
327 * OR, NOT halfop or above.
329 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
336 type = MODETYPE_USER;
341 /* No such nick/channel */
342 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
346 std::string mode_sequence = parameters[1];
347 std::string parameter = "";
348 std::ostringstream parameter_list;
349 std::string output_sequence = "";
350 bool adding = true, state_change = false;
351 unsigned char handler_id = 0;
352 int parameter_counter = 2; /* Index of first parameter */
354 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
355 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
356 mode_sequence.insert(0, "+");
358 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
360 unsigned char modechar = *letter;
362 ServerInstance->Log(DEBUG,"Process letter %c", modechar);
367 * For + and - mode characters, we don't just stick the character into the output sequence.
368 * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
369 * appearing in the output sequence, we store a flag which says there was a state change,
370 * which is set on any + or -, however, the + or - that we finish on is only appended to
371 * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
374 /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
375 * however, will allow the + if it is the first item in the sequence, regardless.
377 if ((!adding) || (!output_sequence.length()))
383 if ((adding) || (!output_sequence.length()))
391 * Watch carefully for the sleight of hand trick.
392 * 65 is the ascii value of 'A'. We take this from
393 * the char we're looking at to get a number between
394 * 1 and 127. We then logic-or it to get the hashed
395 * position, dependent on wether its a channel or
396 * a user mode. This is a little stranger, but a lot
397 * faster, than using a map of pairs.
399 handler_id = (modechar - 65) | mask;
401 if (modehandlers[handler_id])
405 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
407 if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
410 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
412 if (modehandlers[handler_id]->GetNumParams(adding))
414 /* This mode expects a parameter, do we have any parameters left in our list to use? */
415 if (parameter_counter < pcnt)
417 parameter = parameters[parameter_counter++];
420 if ((parameter.rfind(':') != std::string::npos) || (parameter.rfind(' ') != std::string::npos))
425 /* No parameter, continue to the next mode */
430 /* It's an oper only mode, check if theyre an oper. If they arent,
431 * eat any parameter that came with the mode, and continue to next
433 if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
436 /* Call the handler for the mode */
437 ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
439 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
441 /* The handler nuked the parameter and they are supposed to have one.
442 * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
443 * so we bail to the next mode character.
448 if (ma == MODEACTION_ALLOW)
450 /* We're about to output a valid mode letter - was there previously a pending state-change? */
452 output_sequence.append(adding ? "+" : "-");
454 /* Add the mode letter */
455 output_sequence.push_back(modechar);
457 /* Is there a valid parameter for this mode? If so add it to the parameter list */
458 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
460 parameter_list << " " << parameter;
461 /* Does this mode have a prefix? */
462 if (modehandlers[handler_id]->GetPrefix() && targetchannel)
464 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
466 targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
467 modehandlers[handler_id]->GetPrefixRank(), adding);
471 /* Call all the AfterMode events in the mode watchers for this mode */
472 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
473 (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
475 /* Reset the state change flag */
476 state_change = false;
482 /* No mode handler? Unknown mode character then. */
483 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
488 /* Was there at least one valid mode in the sequence? */
489 if (output_sequence != "")
493 if (type == MODETYPE_CHANNEL)
495 targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
499 targetuser->WriteServ("MODE %s %s",targetuser->nick,output_sequence.c_str());
504 if (type == MODETYPE_CHANNEL)
506 ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
507 targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
508 FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
512 user->WriteTo(targetuser,"MODE %s %s",targetuser->nick,output_sequence.c_str());
513 FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence));
521 void cmd_mode::Handle (const char** parameters, int pcnt, userrec *user)
526 ServerInstance->Modes->Process(parameters, pcnt, user, false);
531 void ModeParser::CleanMask(std::string &mask)
533 std::string::size_type pos_of_pling = mask.find_first_of('!');
534 std::string::size_type pos_of_at = mask.find_first_of('@');
535 std::string::size_type pos_of_dot = mask.find_first_of('.');
536 std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
538 if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
540 /* Just a nick, or just a host */
541 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
543 /* It has no '.' in it, it must be a nick. */
548 /* Got a dot in it? Has to be a host */
549 mask = "*!*@" + mask;
552 else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
554 /* Has an @ but no !, its a user@host */
557 else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
559 /* Has a ! but no @, it must be a nick!ident */
564 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
566 unsigned char mask = 0;
567 unsigned char pos = 0;
569 /* Yes, i know, this might let people declare modes like '_' or '^'.
570 * If they do that, thats their problem, and if i ever EVER see an
571 * official InspIRCd developer do that, i'll beat them with a paddle!
573 if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
576 /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
577 * A mode prefix of ':' will fuck up both server to server, and client to server.
579 if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':'))
582 mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
583 pos = (mh->GetModeChar()-65) | mask;
585 if (modehandlers[pos])
588 modehandlers[pos] = mh;
589 ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
593 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
595 unsigned char mask = 0;
596 unsigned char pos = 0;
598 if ((modeletter < 'A') || (modeletter > 'z'))
601 mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
602 pos = (modeletter-65) | mask;
604 return modehandlers[pos];
607 std::string ModeParser::UserModeList()
612 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
614 unsigned char pos = (mode-65) | MASK_USER;
616 if (modehandlers[pos])
617 modestr[pointer++] = mode;
619 modestr[pointer++] = 0;
623 std::string ModeParser::ChannelModeList()
628 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
630 unsigned char pos = (mode-65) | MASK_CHANNEL;
632 if (modehandlers[pos])
633 modestr[pointer++] = mode;
635 modestr[pointer++] = 0;
639 std::string ModeParser::ParaModeList()
644 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
646 unsigned char pos = (mode-65) | MASK_CHANNEL;
648 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
649 modestr[pointer++] = mode;
651 modestr[pointer++] = 0;
655 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
657 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
659 unsigned char pos = (mode-65) | MASK_CHANNEL;
661 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
663 return modehandlers[pos];
669 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
674 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
676 unsigned char pos = (mode-65) | MASK_CHANNEL;
677 ModeHandler* mh = modehandlers[pos];
678 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
681 ret = mh->ModeSet(NULL, user, channel, user->nick);
685 pars.append(user->nick);
686 types.push_back(mh->GetModeChar());
694 std::string ModeParser::ChanModes()
696 std::string type1; /* Listmodes EXCEPT those with a prefix */
697 std::string type2; /* Modes that take a param when adding or removing */
698 std::string type3; /* Modes that only take a param when adding */
699 std::string type4; /* Modes that dont take a param */
701 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
703 unsigned char pos = (mode-65) | MASK_CHANNEL;
704 /* One parameter when adding */
705 if (modehandlers[pos])
707 if (modehandlers[pos]->GetNumParams(true))
709 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
711 type1 += modehandlers[pos]->GetModeChar();
715 /* ... and one parameter when removing */
716 if (modehandlers[pos]->GetNumParams(false))
718 /* But not a list mode */
719 if (!modehandlers[pos]->GetPrefix())
721 type2 += modehandlers[pos]->GetModeChar();
726 /* No parameters when removing */
727 type3 += modehandlers[pos]->GetModeChar();
733 type4 += modehandlers[pos]->GetModeChar();
739 return type1 + "," + type2 + "," + type3 + "," + type4;
742 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
744 return one.second > two.second;
747 std::string ModeParser::BuildPrefixes()
749 std::string mletters = "";
750 std::string mprefixes = "";
752 std::map<char,char> prefix_to_mode;
754 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
756 unsigned char pos = (mode-65) | MASK_CHANNEL;
758 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
760 pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
761 prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
765 sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
767 for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
769 mletters = mletters + n->first;
770 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
773 return "(" + mprefixes + ")" + mletters;
776 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
778 unsigned char mask = 0;
779 unsigned char pos = 0;
784 if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
787 mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
788 pos = (mw->GetModeChar()-65) | mask;
790 modewatchers[pos].push_back(mw);
791 ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
796 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
798 unsigned char mask = 0;
799 unsigned char pos = 0;
804 if ((mw->GetModeType() < 'A') || (mw->GetModeType() > 'z'))
807 mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
808 pos = (mw->GetModeChar()-65) | mask;
810 ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
812 if (a == modewatchers[pos].end())
815 modewatchers[pos].erase(a);
816 ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
821 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
823 /* Clear mode list */
824 memset(modehandlers, 0, sizeof(modehandlers));
825 memset(modewatchers, 0, sizeof(modewatchers));
827 /* Initialise the RFC mode letters */
829 /* Start with channel simple modes, no params */
830 this->AddMode(new ModeChannelSecret(Instance), 's');
831 this->AddMode(new ModeChannelPrivate(Instance), 'p');
832 this->AddMode(new ModeChannelModerated(Instance), 'm');
833 this->AddMode(new ModeChannelTopicOps(Instance), 't');
834 this->AddMode(new ModeChannelNoExternal(Instance), 'n');
835 this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
837 /* Cannel modes with params */
838 this->AddMode(new ModeChannelKey(Instance), 'k');
839 this->AddMode(new ModeChannelLimit(Instance), 'l');
841 /* Channel listmodes */
842 this->AddMode(new ModeChannelBan(Instance), 'b');
843 this->AddMode(new ModeChannelOp(Instance), 'o');
844 this->AddMode(new ModeChannelHalfOp(Instance), 'h');
845 this->AddMode(new ModeChannelVoice(Instance), 'v');
847 /* Now for usermodes */
848 this->AddMode(new ModeUserServerNotice(Instance), 's');
849 this->AddMode(new ModeUserWallops(Instance), 'w');
850 this->AddMode(new ModeUserInvisible(Instance), 'i');
851 this->AddMode(new ModeUserOperator(Instance), 'o');
852 this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');