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 if (*targetuser->oper)
263 user->WriteServ("008 %s +%s :Server notice mask", targetuser->nick, targetuser->FormatNoticeMasks());
267 /* No such nick/channel */
268 user->WriteServ("401 %s %s :No such nick/channel",user->nick, text);
272 void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode)
274 std::string target = parameters[0];
275 ModeType type = MODETYPE_USER;
276 unsigned char mask = 0;
277 chanrec* targetchannel = ServerInstance->FindChan(parameters[0]);
278 userrec* targetuser = ServerInstance->FindNick(parameters[0]);
280 ServerInstance->Log(DEBUG,"ModeParser::Process start");
282 /* Special case for displaying the list for listmodes,
283 * e.g. MODE #chan b, or MODE #chan +b without a parameter
285 if ((targetchannel) && (pcnt == 2))
287 ServerInstance->Log(DEBUG,"Spool list");
288 const char* mode = parameters[1];
291 unsigned char handler_id = ((*mode) - 65) | MASK_CHANNEL;
292 ModeHandler* mh = modehandlers[handler_id];
293 if ((mh) && (mh->IsListMode()))
295 mh->DisplayList(user, targetchannel);
302 ServerInstance->Log(DEBUG,"Mode list request");
303 this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]);
307 ServerInstance->Log(DEBUG,"More than one parameter");
311 type = MODETYPE_CHANNEL;
314 /* Extra security checks on channel modes
315 * (e.g. are they a (half)op?
318 if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP))
320 /* We don't have halfop */
321 ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes");
323 /* Are we a uline or is it a servermode? */
324 if ((!ServerInstance->ULine(user->server)) && (!servermode))
326 /* Not enough permission:
327 * NOT a uline and NOT a servermode,
328 * OR, NOT halfop or above.
330 user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name);
337 type = MODETYPE_USER;
342 /* No such nick/channel */
343 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]);
347 std::string mode_sequence = parameters[1];
348 std::string parameter = "";
349 std::ostringstream parameter_list;
350 std::string output_sequence = "";
351 bool adding = true, state_change = false;
352 unsigned char handler_id = 0;
353 int parameter_counter = 2; /* Index of first parameter */
355 /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */
356 if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-'))
357 mode_sequence.insert(0, "+");
359 for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
361 unsigned char modechar = *letter;
363 ServerInstance->Log(DEBUG,"Process letter %c", modechar);
368 * For + and - mode characters, we don't just stick the character into the output sequence.
369 * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this
370 * appearing in the output sequence, we store a flag which says there was a state change,
371 * which is set on any + or -, however, the + or - that we finish on is only appended to
372 * the output stream in the event it is followed by a non "+ or -" character, such as o or v.
375 /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick,
376 * however, will allow the + if it is the first item in the sequence, regardless.
378 if ((!adding) || (!output_sequence.length()))
384 if ((adding) || (!output_sequence.length()))
392 * Watch carefully for the sleight of hand trick.
393 * 65 is the ascii value of 'A'. We take this from
394 * the char we're looking at to get a number between
395 * 1 and 127. We then logic-or it to get the hashed
396 * position, dependent on wether its a channel or
397 * a user mode. This is a little stranger, but a lot
398 * faster, than using a map of pairs.
400 handler_id = (modechar - 65) | mask;
402 if (modehandlers[handler_id])
406 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
408 if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY)
411 if ((modehandlers[handler_id]->GetModeType() == type) && (!abort))
413 if (modehandlers[handler_id]->GetNumParams(adding))
415 /* This mode expects a parameter, do we have any parameters left in our list to use? */
416 if (parameter_counter < pcnt)
418 parameter = parameters[parameter_counter++];
421 if ((parameter.rfind(':') != std::string::npos) || (parameter.rfind(' ') != std::string::npos))
426 /* No parameter, continue to the next mode */
431 /* It's an oper only mode, check if theyre an oper. If they arent,
432 * eat any parameter that came with the mode, and continue to next
434 if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper))
436 user->WriteServ("481 %s :Permission Denied- Only IRC operators may %sset %s mode %c", user->nick,
437 adding ? "" : "un", type == MODETYPE_CHANNEL ? "channel" : "user",
438 modehandlers[handler_id]->GetModeChar());
442 /* Call the handler for the mode */
443 ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding);
445 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == ""))
447 /* The handler nuked the parameter and they are supposed to have one.
448 * We CANT continue now, even if they actually returned MODEACTION_ALLOW,
449 * so we bail to the next mode character.
454 if (ma == MODEACTION_ALLOW)
456 /* We're about to output a valid mode letter - was there previously a pending state-change? */
458 output_sequence.append(adding ? "+" : "-");
460 /* Add the mode letter */
461 output_sequence.push_back(modechar);
463 /* Is there a valid parameter for this mode? If so add it to the parameter list */
464 if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != ""))
466 parameter_list << " " << parameter;
467 /* Does this mode have a prefix? */
468 if (modehandlers[handler_id]->GetPrefix() && targetchannel)
470 userrec* user_to_prefix = ServerInstance->FindNick(parameter);
472 targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(),
473 modehandlers[handler_id]->GetPrefixRank(), adding);
477 /* Call all the AfterMode events in the mode watchers for this mode */
478 for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++)
479 (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type);
481 /* Reset the state change flag */
482 state_change = false;
488 /* No mode handler? Unknown mode character then. */
489 user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar);
494 /* Was there at least one valid mode in the sequence? */
495 if (output_sequence != "")
499 if (type == MODETYPE_CHANNEL)
501 targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str());
505 targetuser->WriteServ("MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
510 if (type == MODETYPE_CHANNEL)
512 ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
513 targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str());
514 FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str()));
518 user->WriteTo(targetuser,"MODE %s %s%s",targetuser->nick,output_sequence.c_str(), parameter_list.str().c_str());
519 FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence));
527 void cmd_mode::Handle (const char** parameters, int pcnt, userrec *user)
532 ServerInstance->Modes->Process(parameters, pcnt, user, false);
537 void ModeParser::CleanMask(std::string &mask)
539 std::string::size_type pos_of_pling = mask.find_first_of('!');
540 std::string::size_type pos_of_at = mask.find_first_of('@');
541 std::string::size_type pos_of_dot = mask.find_first_of('.');
542 std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */
544 if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos))
546 /* Just a nick, or just a host */
547 if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos))
549 /* It has no '.' in it, it must be a nick. */
554 /* Got a dot in it? Has to be a host */
555 mask = "*!*@" + mask;
558 else if ((pos_of_pling == std::string::npos) && (pos_of_at != std::string::npos))
560 /* Has an @ but no !, its a user@host */
563 else if ((pos_of_pling != std::string::npos) && (pos_of_at == std::string::npos))
565 /* Has a ! but no @, it must be a nick!ident */
570 bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter)
572 unsigned char mask = 0;
573 unsigned char pos = 0;
575 /* Yes, i know, this might let people declare modes like '_' or '^'.
576 * If they do that, thats their problem, and if i ever EVER see an
577 * official InspIRCd developer do that, i'll beat them with a paddle!
579 if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z'))
582 /* A mode prefix of ',' is not acceptable, it would fuck up server to server.
583 * A mode prefix of ':' will fuck up both server to server, and client to server.
585 if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':'))
588 mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
589 pos = (mh->GetModeChar()-65) | mask;
591 if (modehandlers[pos])
594 modehandlers[pos] = mh;
595 ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar());
599 ModeHandler* ModeParser::FindMode(unsigned const char modeletter, ModeType mt)
601 unsigned char mask = 0;
602 unsigned char pos = 0;
604 if ((modeletter < 'A') || (modeletter > 'z'))
607 mt == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
608 pos = (modeletter-65) | mask;
610 return modehandlers[pos];
613 std::string ModeParser::UserModeList()
618 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
620 unsigned char pos = (mode-65) | MASK_USER;
622 if (modehandlers[pos])
623 modestr[pointer++] = mode;
625 modestr[pointer++] = 0;
629 std::string ModeParser::ChannelModeList()
634 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
636 unsigned char pos = (mode-65) | MASK_CHANNEL;
638 if (modehandlers[pos])
639 modestr[pointer++] = mode;
641 modestr[pointer++] = 0;
645 std::string ModeParser::ParaModeList()
650 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
652 unsigned char pos = (mode-65) | MASK_CHANNEL;
654 if ((modehandlers[pos]) && (modehandlers[pos]->GetNumParams(true)))
655 modestr[pointer++] = mode;
657 modestr[pointer++] = 0;
661 ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter)
663 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
665 unsigned char pos = (mode-65) | MASK_CHANNEL;
667 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix() == pfxletter))
669 return modehandlers[pos];
675 std::string ModeParser::ModeString(userrec* user, chanrec* channel)
680 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
682 unsigned char pos = (mode-65) | MASK_CHANNEL;
683 ModeHandler* mh = modehandlers[pos];
684 if ((mh) && (mh->GetNumParams(true)) && (mh->GetNumParams(false)))
687 ret = mh->ModeSet(NULL, user, channel, user->nick);
691 pars.append(user->nick);
692 types.push_back(mh->GetModeChar());
700 std::string ModeParser::ChanModes()
702 std::string type1; /* Listmodes EXCEPT those with a prefix */
703 std::string type2; /* Modes that take a param when adding or removing */
704 std::string type3; /* Modes that only take a param when adding */
705 std::string type4; /* Modes that dont take a param */
707 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
709 unsigned char pos = (mode-65) | MASK_CHANNEL;
710 /* One parameter when adding */
711 if (modehandlers[pos])
713 if (modehandlers[pos]->GetNumParams(true))
715 if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix()))
717 type1 += modehandlers[pos]->GetModeChar();
721 /* ... and one parameter when removing */
722 if (modehandlers[pos]->GetNumParams(false))
724 /* But not a list mode */
725 if (!modehandlers[pos]->GetPrefix())
727 type2 += modehandlers[pos]->GetModeChar();
732 /* No parameters when removing */
733 type3 += modehandlers[pos]->GetModeChar();
739 type4 += modehandlers[pos]->GetModeChar();
745 return type1 + "," + type2 + "," + type3 + "," + type4;
748 bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two)
750 return one.second > two.second;
753 std::string ModeParser::BuildPrefixes()
755 std::string mletters = "";
756 std::string mprefixes = "";
758 std::map<char,char> prefix_to_mode;
760 for (unsigned char mode = 'A'; mode <= 'z'; mode++)
762 unsigned char pos = (mode-65) | MASK_CHANNEL;
764 if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix()))
766 pfx.push_back(std::make_pair<char,unsigned int>(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank()));
767 prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar();
771 sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison);
773 for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++)
775 mletters = mletters + n->first;
776 mprefixes = mprefixes + prefix_to_mode.find(n->first)->second;
779 return "(" + mprefixes + ")" + mletters;
782 bool ModeParser::AddModeWatcher(ModeWatcher* mw)
784 unsigned char mask = 0;
785 unsigned char pos = 0;
790 if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z'))
793 mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
794 pos = (mw->GetModeChar()-65) | mask;
796 modewatchers[pos].push_back(mw);
797 ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar());
802 bool ModeParser::DelModeWatcher(ModeWatcher* mw)
804 unsigned char mask = 0;
805 unsigned char pos = 0;
810 if ((mw->GetModeType() < 'A') || (mw->GetModeType() > 'z'))
813 mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL;
814 pos = (mw->GetModeChar()-65) | mask;
816 ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw);
818 if (a == modewatchers[pos].end())
821 modewatchers[pos].erase(a);
822 ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar());
827 ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance)
829 /* Clear mode list */
830 memset(modehandlers, 0, sizeof(modehandlers));
831 memset(modewatchers, 0, sizeof(modewatchers));
833 /* Initialise the RFC mode letters */
835 /* Start with channel simple modes, no params */
836 this->AddMode(new ModeChannelSecret(Instance), 's');
837 this->AddMode(new ModeChannelPrivate(Instance), 'p');
838 this->AddMode(new ModeChannelModerated(Instance), 'm');
839 this->AddMode(new ModeChannelTopicOps(Instance), 't');
840 this->AddMode(new ModeChannelNoExternal(Instance), 'n');
841 this->AddMode(new ModeChannelInviteOnly(Instance), 'i');
843 /* Cannel modes with params */
844 this->AddMode(new ModeChannelKey(Instance), 'k');
845 this->AddMode(new ModeChannelLimit(Instance), 'l');
847 /* Channel listmodes */
848 this->AddMode(new ModeChannelBan(Instance), 'b');
849 this->AddMode(new ModeChannelOp(Instance), 'o');
850 this->AddMode(new ModeChannelHalfOp(Instance), 'h');
851 this->AddMode(new ModeChannelVoice(Instance), 'v');
853 /* Now for usermodes */
854 this->AddMode(new ModeUserServerNotice(Instance), 's');
855 this->AddMode(new ModeUserWallops(Instance), 'w');
856 this->AddMode(new ModeUserInvisible(Instance), 'i');
857 this->AddMode(new ModeUserOperator(Instance), 'o');
858 this->AddMode(new ModeUserServerNoticeMask(Instance), 'n');