X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fmode.cpp;h=89ff37fa1e7fd0b709bd411c220abdf15cf6b1f4;hb=4e3d7a6e30eadf714483994681b8b2534229f4a8;hp=8351ab2e0bde21d22a941a54e8d10a2a12c5b62d;hpb=272349a3e921ac880ad94f09508160915f7ffe9c;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/mode.cpp b/src/mode.cpp index 8351ab2e0..89ff37fa1 100644 --- a/src/mode.cpp +++ b/src/mode.cpp @@ -1,75 +1,68 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev. - * E-mail: - * - * - * - * Written by Craig Edwards, Craig McLure, and others. - * This program is free but copyrighted software; see - * the file COPYING for details. + * Copyright (C) 2012 Shawn Smith + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2007, 2009 Dennis Friis + * Copyright (C) 2006-2008 Robin Burchell + * Copyright (C) 2008 Thomas Stagner + * Copyright (C) 2004-2008 Craig Edwards + * Copyright (C) 2006 Oliver Lupton * - * --------------------------------------------------- + * This file is part of InspIRCd. InspIRCd is free software: you can + * redistribute it and/or modify it under the terms of the GNU General Public + * License as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ -using namespace std; -#include "inspircd_config.h" #include "inspircd.h" -#include "configreader.h" -#include -#include "hash_map.h" -#include "connection.h" -#include "users.h" -#include "modules.h" -#include "inspstring.h" - -#include "commands.h" -#include "mode.h" /* +s (secret) */ -#include "modes/cmode_s.h" /* +p (private) */ -#include "modes/cmode_p.h" -/* +b (bans) */ -#include "modes/cmode_b.h" /* +m (moderated) */ -#include "modes/cmode_m.h" /* +t (only (half) ops can change topic) */ -#include "modes/cmode_t.h" /* +n (no external messages) */ -#include "modes/cmode_n.h" /* +i (invite only) */ -#include "modes/cmode_i.h" +/* +w (see wallops) */ +/* +i (invisible) */ +#include "modes/simplemodes.h" +/* +b (bans) */ +#include "modes/cmode_b.h" /* +k (keyed channel) */ #include "modes/cmode_k.h" /* +l (channel user limit) */ #include "modes/cmode_l.h" /* +o (channel op) */ #include "modes/cmode_o.h" -/* +h (channel halfop) */ -#include "modes/cmode_h.h" /* +v (channel voice) */ #include "modes/cmode_v.h" - -/* +s (server notices) */ -#include "modes/umode_s.h" -/* +w (see wallops) */ -#include "modes/umode_w.h" -/* +i (invisible) */ -#include "modes/umode_i.h" /* +o (operator) */ #include "modes/umode_o.h" -/* +n (notice mask - our implementation of snomasks) */ -#include "modes/umode_n.h" +/* +s (server notice masks) */ +#include "modes/umode_s.h" -ModeHandler::ModeHandler(InspIRCd* Instance, char modeletter, int parameters_on, int parameters_off, bool listmode, ModeType type, bool operonly, char mprefix) - : ServerInstance(Instance), mode(modeletter), n_params_on(parameters_on), n_params_off(parameters_off), list(listmode), m_type(type), oper(operonly), prefix(mprefix) +ModeHandler::ModeHandler(Module* Creator, const std::string& Name, char modeletter, ParamSpec Params, ModeType type) + : ServiceProvider(Creator, Name, SERVICE_MODE), m_paramtype(TR_TEXT), + parameters_taken(Params), mode(modeletter), prefix(0), oper(false), + list(false), m_type(type), levelrequired(HALFOP_VALUE) { } +CullResult ModeHandler::cull() +{ + if (ServerInstance->Modes) + ServerInstance->Modes->DelMode(this); + return classbase::cull(); +} + ModeHandler::~ModeHandler() { } @@ -84,58 +77,110 @@ unsigned int ModeHandler::GetPrefixRank() return 0; } -ModeType ModeHandler::GetModeType() +int ModeHandler::GetNumParams(bool adding) { - return m_type; + switch (parameters_taken) + { + case PARAM_ALWAYS: + return 1; + case PARAM_SETONLY: + return adding ? 1 : 0; + case PARAM_NONE: + break; + } + return 0; } -bool ModeHandler::NeedsOper() +std::string ModeHandler::GetUserParameter(User* user) { - return oper; + return ""; } -char ModeHandler::GetPrefix() +ModResult ModeHandler::AccessCheck(User*, Channel*, std::string &, bool) { - return prefix; + return MOD_RES_PASSTHRU; } -int ModeHandler::GetNumParams(bool adding) +ModeAction ModeHandler::OnModeChange(User*, User*, Channel*, std::string&, bool) { - return adding ? n_params_on : n_params_off; + return MODEACTION_DENY; } -char ModeHandler::GetModeChar() +void ModeHandler::DisplayList(User*, Channel*) { - return mode; } -ModeAction ModeHandler::OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding) +void ModeHandler::DisplayEmptyList(User*, Channel*) { - return MODEACTION_DENY; } -ModePair ModeHandler::ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter) +void ModeHandler::OnParameterMissing(User* user, User* dest, Channel* channel) { - if (dest) - { - return std::make_pair(dest->IsModeSet(this->mode), ""); - } - else - { - return std::make_pair(channel->IsModeSet(this->mode), ""); - } } -void ModeHandler::DisplayList(userrec* user, chanrec* channel) +bool ModeHandler::ResolveModeConflict(std::string& theirs, const std::string& ours, Channel*) +{ + return (theirs < ours); +} + +ModeAction SimpleUserModeHandler::OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) { + /* We're either trying to add a mode we already have or + remove a mode we don't have, deny. */ + if (dest->IsModeSet(this->GetModeChar()) == adding) + return MODEACTION_DENY; + + /* adding will be either true or false, depending on if we + are adding or removing the mode, since we already checked + to make sure we aren't adding a mode we have or that we + aren't removing a mode we don't have, we don't have to do any + other checks here to see if it's true or false, just add or + remove the mode */ + dest->SetMode(this->GetModeChar(), adding); + + return MODEACTION_ALLOW; +} + + +ModeAction SimpleChannelModeHandler::OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) +{ + /* We're either trying to add a mode we already have or + remove a mode we don't have, deny. */ + if (channel->IsModeSet(this->GetModeChar()) == adding) + return MODEACTION_DENY; + + /* adding will be either true or false, depending on if we + are adding or removing the mode, since we already checked + to make sure we aren't adding a mode we have or that we + aren't removing a mode we don't have, we don't have to do any + other checks here to see if it's true or false, just add or + remove the mode */ + channel->SetMode(this->GetModeChar(), adding); + + return MODEACTION_ALLOW; +} + +ModeAction ParamChannelModeHandler::OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) +{ + if (adding && !ParamValidate(parameter)) + return MODEACTION_DENY; + std::string now = channel->GetModeParameter(this); + if (parameter == now) + return MODEACTION_DENY; + if (adding) + channel->SetModeParam(this, parameter); + else + channel->SetModeParam(this, ""); + return MODEACTION_ALLOW; } -bool ModeHandler::CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel) +bool ParamChannelModeHandler::ParamValidate(std::string& parameter) { - return (ours < theirs); + return true; } -ModeWatcher::ModeWatcher(InspIRCd* Instance, char modeletter, ModeType type) : ServerInstance(Instance), mode(modeletter), m_type(type) +ModeWatcher::ModeWatcher(Module* Creator, char modeletter, ModeType type) + : mode(modeletter), m_type(type), creator(Creator) { } @@ -153,18 +198,18 @@ ModeType ModeWatcher::GetModeType() return m_type; } -bool ModeWatcher::BeforeMode(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding, ModeType type) +bool ModeWatcher::BeforeMode(User*, User*, Channel*, std::string&, bool, ModeType) { return true; } -void ModeWatcher::AfterMode(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter, bool adding, ModeType type) +void ModeWatcher::AfterMode(User*, User*, Channel*, const std::string&, bool, ModeType) { } -userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,int status) +User* ModeParser::SanityChecks(User *user, const char *dest, Channel *chan, int) { - userrec *d; + User *d; if ((!user) || (!dest) || (!chan) || (!*dest)) { return NULL; @@ -172,360 +217,390 @@ userrec* ModeParser::SanityChecks(userrec *user,const char *dest,chanrec *chan,i d = ServerInstance->FindNick(dest); if (!d) { - user->WriteServ("401 %s %s :No such nick/channel",user->nick, dest); + user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), dest); return NULL; } return d; } -const char* ModeParser::Grant(userrec *d,chanrec *chan,int MASK) +void ModeParser::DisplayCurrentModes(User *user, User* targetuser, Channel* targetchannel, const char* text) { - if (!chan) - return ""; - - for (std::vector::const_iterator i = d->chans.begin(); i != d->chans.end(); i++) + if (targetchannel) { - ucrec* n = (ucrec*)(*i); - if (n->channel == chan) + /* Display channel's current mode string */ + user->WriteNumeric(RPL_CHANNELMODEIS, "%s %s +%s",user->nick.c_str(), targetchannel->name.c_str(), targetchannel->ChanModes(targetchannel->HasUser(user))); + user->WriteNumeric(RPL_CHANNELCREATED, "%s %s %lu", user->nick.c_str(), targetchannel->name.c_str(), (unsigned long)targetchannel->age); + return; + } + else + { + if (targetuser == user || user->HasPrivPermission("users/auspex")) { - if (n->uc_modes & MASK) - { - return ""; - } - n->uc_modes = n->uc_modes | MASK; - switch (MASK) - { - case UCMODE_OP: - n->channel->AddOppedUser(d); - break; - case UCMODE_HOP: - n->channel->AddHalfoppedUser(d); - break; - case UCMODE_VOICE: - n->channel->AddVoicedUser(d); - break; - } - ServerInstance->Log(DEBUG,"grant: %s %s",n->channel->name,d->nick); - return d->nick; + /* Display user's current mode string */ + user->WriteNumeric(RPL_UMODEIS, "%s :+%s",targetuser->nick.c_str(),targetuser->FormatModes()); + if (IS_OPER(targetuser)) + user->WriteNumeric(RPL_SNOMASKIS, "%s +%s :Server notice mask", targetuser->nick.c_str(), targetuser->FormatNoticeMasks()); + return; + } + else + { + user->WriteNumeric(ERR_USERSDONTMATCH, "%s :Can't view modes for other users", user->nick.c_str()); + return; } } - return ""; } -const char* ModeParser::Revoke(userrec *d,chanrec *chan,int MASK) +ModeAction ModeParser::TryMode(User* user, User* targetuser, Channel* chan, bool adding, const unsigned char modechar, + std::string ¶meter, bool SkipACL) { - if (!chan) - return ""; + ModeType type = chan ? MODETYPE_CHANNEL : MODETYPE_USER; + unsigned char mask = chan ? MASK_CHANNEL : MASK_USER; + + ModeHandler *mh = FindMode(modechar, type); + int pcnt = mh->GetNumParams(adding); - for (std::vector::const_iterator i = d->chans.begin(); i != d->chans.end(); i++) + // crop mode parameter size to 250 characters + if (parameter.length() > 250 && adding) + parameter = parameter.substr(0, 250); + + ModResult MOD_RESULT; + FIRST_MOD_RESULT(OnRawMode, MOD_RESULT, (user, chan, modechar, parameter, adding, pcnt)); + + if (IS_LOCAL(user) && (MOD_RESULT == MOD_RES_DENY)) + return MODEACTION_DENY; + + if (chan && !SkipACL && (MOD_RESULT != MOD_RES_ALLOW)) { - ucrec* n = (ucrec*)(*i); - if (n->channel == chan) + MOD_RESULT = mh->AccessCheck(user, chan, parameter, adding); + + if (MOD_RESULT == MOD_RES_DENY) + return MODEACTION_DENY; + if (MOD_RESULT == MOD_RES_PASSTHRU) { - if ((n->uc_modes & MASK) == 0) - { - return ""; - } - n->uc_modes ^= MASK; - switch (MASK) + unsigned int neededrank = mh->GetLevelRequired(); + /* Compare our rank on the channel against the rank of the required prefix, + * allow if >= ours. Because mIRC and xchat throw a tizz if the modes shown + * in NAMES(X) are not in rank order, we know the most powerful mode is listed + * first, so we don't need to iterate, we just look up the first instead. + */ + unsigned int ourrank = chan->GetPrefixValue(user); + if (ourrank < neededrank) { - case UCMODE_OP: - n->channel->DelOppedUser(d); - break; - case UCMODE_HOP: - n->channel->DelHalfoppedUser(d); - break; - case UCMODE_VOICE: - n->channel->DelVoicedUser(d); - break; + ModeHandler* neededmh = NULL; + for(char c='A'; c <= 'z'; c++) + { + ModeHandler *privmh = FindMode(c, MODETYPE_CHANNEL); + if (privmh && privmh->GetPrefixRank() >= neededrank) + { + // this mode is sufficient to allow this action + if (!neededmh || privmh->GetPrefixRank() < neededmh->GetPrefixRank()) + neededmh = privmh; + } + } + if (neededmh) + user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must have channel %s access or above to %sset channel mode %c", + user->nick.c_str(), chan->name.c_str(), neededmh->name.c_str(), adding ? "" : "un", modechar); + else + user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You cannot %sset channel mode %c", + user->nick.c_str(), chan->name.c_str(), adding ? "" : "un", modechar); + return MODEACTION_DENY; } - ServerInstance->Log(DEBUG,"revoke: %s %s",n->channel->name,d->nick); - return d->nick; } } - return ""; -} -void ModeParser::DisplayCurrentModes(userrec *user, userrec* targetuser, chanrec* targetchannel, const char* text) -{ - if (targetchannel) + unsigned char handler_id = (modechar - 'A') | mask; + + for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) { - /* Display channel's current mode string */ - user->WriteServ("324 %s %s +%s",user->nick, targetchannel->name, targetchannel->ChanModes(targetchannel->HasUser(user))); - user->WriteServ("329 %s %s %d", user->nick, targetchannel->name, targetchannel->created); - return; + if ((*watchers)->BeforeMode(user, targetuser, chan, parameter, adding, type) == false) + return MODEACTION_DENY; + /* A module whacked the parameter completely, and there was one. abort. */ + if (pcnt && parameter.empty()) + return MODEACTION_DENY; } - else if (targetuser) + + if (IS_LOCAL(user) && !IS_OPER(user)) { - /* Display user's current mode string */ - user->WriteServ("221 %s :+%s",targetuser->nick,targetuser->FormatModes()); - user->WriteServ("008 %s :+%s", targetuser->nick, targetuser->FormatNoticeMasks()); - return; + char* disabled = (type == MODETYPE_CHANNEL) ? ServerInstance->Config->DisabledCModes : ServerInstance->Config->DisabledUModes; + if (disabled[modechar - 'A']) + { + user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - %s mode %c has been locked by the administrator", + user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar); + return MODEACTION_DENY; + } } - /* No such nick/channel */ - user->WriteServ("401 %s %s :No such nick/channel",user->nick, text); - return; -} - -void ModeParser::Process(const char** parameters, int pcnt, userrec *user, bool servermode) -{ - std::string target = parameters[0]; - ModeType type = MODETYPE_USER; - unsigned char mask = 0; - chanrec* targetchannel = ServerInstance->FindChan(parameters[0]); - userrec* targetuser = ServerInstance->FindNick(parameters[0]); + if (adding && IS_LOCAL(user) && mh->NeedsOper() && !user->HasModePermission(modechar, type)) + { + /* It's an oper only mode, and they don't have access to it. */ + if (IS_OPER(user)) + { + user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Oper type %s does not have access to set %s mode %c", + user->nick.c_str(), user->oper->NameStr(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar); + } + else + { + user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Only operators may set %s mode %c", + user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar); + } + return MODEACTION_DENY; + } - ServerInstance->Log(DEBUG,"ModeParser::Process start"); + if (mh->GetTranslateType() == TR_NICK) + { + User* prefixtarget; + if (IS_LOCAL(user)) + prefixtarget = ServerInstance->FindNickOnly(parameter); + else + prefixtarget = ServerInstance->FindNick(parameter); - /* Special case for displaying the list for listmodes, - * e.g. MODE #chan b, or MODE #chan +b without a parameter - */ - if ((targetchannel) && (pcnt == 2)) - { - ServerInstance->Log(DEBUG,"Spool list"); - const char* mode = parameters[1]; - if (*mode == '+') - mode++; - unsigned char handler_id = ((*mode) - 65) | MASK_CHANNEL; - ModeHandler* mh = modehandlers[handler_id]; - if ((mh) && (mh->IsListMode())) + if (!prefixtarget) { - mh->DisplayList(user, targetchannel); - return; + user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel", user->nick.c_str(), parameter.c_str()); + return MODEACTION_DENY; } } - if (pcnt == 1) + if (mh->GetPrefixRank() && chan) + { + User* user_to_prefix = ServerInstance->FindNick(parameter); + if (!user_to_prefix) + return MODEACTION_DENY; + if (!chan->SetPrefix(user_to_prefix, modechar, adding)) + return MODEACTION_DENY; + } + + /* Call the handler for the mode */ + ModeAction ma = mh->OnModeChange(user, targetuser, chan, parameter, adding); + + if (pcnt && parameter.empty()) + return MODEACTION_DENY; + + if (ma != MODEACTION_ALLOW) + return ma; + + for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) + (*watchers)->AfterMode(user, targetuser, chan, parameter, adding, type); + + return MODEACTION_ALLOW; +} + +void ModeParser::Process(const std::vector& parameters, User *user, bool merge) +{ + const std::string& target = parameters[0]; + Channel* targetchannel = ServerInstance->FindChan(target); + User* targetuser = NULL; + if (!targetchannel) + { + if (IS_LOCAL(user)) + targetuser = ServerInstance->FindNickOnly(target); + else + targetuser = ServerInstance->FindNick(target); + } + ModeType type = targetchannel ? MODETYPE_CHANNEL : MODETYPE_USER; + + LastParse.clear(); + LastParseParams.clear(); + LastParseTranslate.clear(); + + if ((!targetchannel) && ((!targetuser) || (IS_SERVER(targetuser)))) { - ServerInstance->Log(DEBUG,"Mode list request"); - this->DisplayCurrentModes(user, targetuser, targetchannel, parameters[0]); + user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(),target.c_str()); + return; } - else if (pcnt > 1) + if (parameters.size() == 1) { - ServerInstance->Log(DEBUG,"More than one parameter"); + this->DisplayCurrentModes(user, targetuser, targetchannel, target.c_str()); + return; + } - if (targetchannel) + ModResult MOD_RESULT; + FIRST_MOD_RESULT(OnPreMode, MOD_RESULT, (user, targetuser, targetchannel, parameters)); + + bool SkipAccessChecks = false; + + if (!IS_LOCAL(user) || ServerInstance->ULine(user->server) || MOD_RESULT == MOD_RES_ALLOW) + SkipAccessChecks = true; + else if (MOD_RESULT == MOD_RES_DENY) + return; + + if (targetuser && !SkipAccessChecks && user != targetuser) + { + user->WriteNumeric(ERR_USERSDONTMATCH, "%s :Can't change mode for other users", user->nick.c_str()); + return; + } + + std::string mode_sequence = parameters[1]; + + std::string output_mode; + std::ostringstream output_parameters; + LastParseParams.push_back(output_mode); + LastParseTranslate.push_back(TR_TEXT); + + bool adding = true; + char output_pm = '\0'; // current output state, '+' or '-' + unsigned int param_at = 2; + + for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++) + { + unsigned char modechar = *letter; + if (modechar == '+' || modechar == '-') { - type = MODETYPE_CHANNEL; - mask = MASK_CHANNEL; + adding = (modechar == '+'); + continue; + } - /* Extra security checks on channel modes - * (e.g. are they a (half)op? - */ + ModeHandler *mh = this->FindMode(modechar, type); + if (!mh) + { + /* No mode handler? Unknown mode character then. */ + user->WriteServ("%d %s %c :is unknown mode char to me", type == MODETYPE_CHANNEL ? 472 : 501, user->nick.c_str(), modechar); + continue; + } - if ((IS_LOCAL(user)) && (targetchannel->GetStatus(user) < STATUS_HOP)) + std::string parameter; + int pcnt = mh->GetNumParams(adding); + if (pcnt && param_at == parameters.size()) + { + /* No parameter, continue to the next mode */ + mh->OnParameterMissing(user, targetuser, targetchannel); + continue; + } + else if (pcnt) + { + parameter = parameters[param_at++]; + /* Make sure the user isn't trying to slip in an invalid parameter */ + if ((parameter.empty()) || (parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos)) + continue; + if (merge && targetchannel && targetchannel->IsModeSet(modechar) && !mh->IsListMode()) { - /* We don't have halfop */ - ServerInstance->Log(DEBUG,"The user is not a halfop or above, checking other reasons for being able to set the modes"); + std::string ours = targetchannel->GetModeParameter(modechar); + if (!mh->ResolveModeConflict(parameter, ours, targetchannel)) + /* we won the mode merge, don't apply this mode */ + continue; + } + } - /* Are we a uline or is it a servermode? */ - if ((!ServerInstance->ULine(user->server)) && (!servermode)) - { - /* Not enough permission: - * NOT a uline and NOT a servermode, - * OR, NOT halfop or above. - */ - user->WriteServ("482 %s %s :You're not a channel (half)operator",user->nick, targetchannel->name); - return; - } + ModeAction ma = TryMode(user, targetuser, targetchannel, adding, modechar, parameter, SkipAccessChecks); + + if (ma != MODEACTION_ALLOW) + continue; + + char needed_pm = adding ? '+' : '-'; + if (needed_pm != output_pm) + { + output_pm = needed_pm; + output_mode.append(1, output_pm); + } + output_mode.append(1, modechar); + + if (pcnt) + { + TranslateType tt = mh->GetTranslateType(); + if (tt == TR_NICK) + { + User* u = ServerInstance->FindNick(parameter); + if (u) + parameter = u->nick; } + output_parameters << " " << parameter; + LastParseParams.push_back(parameter); + LastParseTranslate.push_back(tt); } - else if (targetuser) + + if ( (output_mode.length() + output_parameters.str().length() > 450) + || (output_mode.length() > 100) + || (LastParseParams.size() > ServerInstance->Config->Limits.MaxModes)) { - type = MODETYPE_USER; - mask = MASK_USER; + /* mode sequence is getting too long */ + break; + } + } + + LastParseParams[0] = output_mode; + + if (!output_mode.empty()) + { + LastParse = targetchannel ? targetchannel->name : targetuser->nick; + LastParse.append(" "); + LastParse.append(output_mode); + LastParse.append(output_parameters.str()); + + if (targetchannel) + { + targetchannel->WriteChannel(user, "MODE %s", LastParse.c_str()); + FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, LastParseParams, LastParseTranslate)); } else { - /* No such nick/channel */ - user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[0]); - return; + targetuser->WriteFrom(user, "MODE %s", LastParse.c_str()); + FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, LastParseParams, LastParseTranslate)); } + } + else if (targetchannel && parameters.size() == 2) + { + /* Special case for displaying the list for listmodes, + * e.g. MODE #chan b, or MODE #chan +b without a parameter + */ + this->DisplayListModes(user, targetchannel, mode_sequence); + } +} - std::string mode_sequence = parameters[1]; - std::string parameter = ""; - std::ostringstream parameter_list; - std::string output_sequence = ""; - bool adding = true, state_change = false; - unsigned char handler_id = 0; - int parameter_counter = 2; /* Index of first parameter */ +void ModeParser::DisplayListModes(User* user, Channel* chan, std::string &mode_sequence) +{ + seq++; - /* A mode sequence that doesnt start with + or -. Assume +. - Thanks for the suggestion spike (bug#132) */ - if ((*mode_sequence.begin() != '+') && (*mode_sequence.begin() != '-')) - mode_sequence.insert(0, "+"); + for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++) + { + unsigned char mletter = *letter; + if (mletter == '+') + continue; - for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++) - { - unsigned char modechar = *letter; + /* Ensure the user doesnt request the same mode twice, + * so they cant flood themselves off out of idiocy. + */ + if (sent[mletter] == seq) + continue; - ServerInstance->Log(DEBUG,"Process letter %c", modechar); + sent[mletter] = seq; - switch (modechar) - { - /* NB: - * For + and - mode characters, we don't just stick the character into the output sequence. - * This is because the user may do something dumb, like: +-+ooo or +oo-+. To prevent this - * appearing in the output sequence, we store a flag which says there was a state change, - * which is set on any + or -, however, the + or - that we finish on is only appended to - * the output stream in the event it is followed by a non "+ or -" character, such as o or v. - */ - case '+': - /* The following expression prevents: +o+o nick nick, compressing it to +oo nick nick, - * however, will allow the + if it is the first item in the sequence, regardless. - */ - if ((!adding) || (!output_sequence.length())) - state_change = true; - adding = true; - continue; - break; - case '-': - if ((adding) || (!output_sequence.length())) - state_change = true; - adding = false; - continue; - break; - default: - - /** - * Watch carefully for the sleight of hand trick. - * 65 is the ascii value of 'A'. We take this from - * the char we're looking at to get a number between - * 1 and 127. We then logic-or it to get the hashed - * position, dependent on wether its a channel or - * a user mode. This is a little stranger, but a lot - * faster, than using a map of pairs. - */ - handler_id = (modechar - 65) | mask; - - if (modehandlers[handler_id]) - { - bool abort = false; + ModeHandler *mh = this->FindMode(mletter, MODETYPE_CHANNEL); - for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) - { - if ((*watchers)->BeforeMode(user, targetuser, targetchannel, parameter, adding, type) == MODEACTION_DENY) - abort = true; - } - if ((modehandlers[handler_id]->GetModeType() == type) && (!abort)) - { - if (modehandlers[handler_id]->GetNumParams(adding)) - { - /* This mode expects a parameter, do we have any parameters left in our list to use? */ - if (parameter_counter < pcnt) - { - parameter = parameters[parameter_counter++]; - - /* Yerk, invalid! */ - if ((parameter.rfind(':') != std::string::npos) || (parameter.rfind(' ') != std::string::npos)) - parameter = ""; - } - else - { - /* No parameter, continue to the next mode */ - continue; - } - } - - /* It's an oper only mode, check if theyre an oper. If they arent, - * eat any parameter that came with the mode, and continue to next - */ - if ((IS_LOCAL(user)) && (modehandlers[handler_id]->NeedsOper()) && (!*user->oper)) - continue; - - /* Call the handler for the mode */ - ModeAction ma = modehandlers[handler_id]->OnModeChange(user, targetuser, targetchannel, parameter, adding); - - if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter == "")) - { - /* The handler nuked the parameter and they are supposed to have one. - * We CANT continue now, even if they actually returned MODEACTION_ALLOW, - * so we bail to the next mode character. - */ - continue; - } - - if (ma == MODEACTION_ALLOW) - { - /* We're about to output a valid mode letter - was there previously a pending state-change? */ - if (state_change) - output_sequence.append(adding ? "+" : "-"); - - /* Add the mode letter */ - output_sequence.push_back(modechar); - - /* Is there a valid parameter for this mode? If so add it to the parameter list */ - if ((modehandlers[handler_id]->GetNumParams(adding)) && (parameter != "")) - { - parameter_list << " " << parameter; - /* Does this mode have a prefix? */ - if (modehandlers[handler_id]->GetPrefix() && targetchannel) - { - userrec* user_to_prefix = ServerInstance->FindNick(parameter); - if (user_to_prefix) - targetchannel->SetPrefix(user_to_prefix, modehandlers[handler_id]->GetPrefix(), - modehandlers[handler_id]->GetPrefixRank(), adding); - } - } - - /* Call all the AfterMode events in the mode watchers for this mode */ - for (ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) - (*watchers)->AfterMode(user, targetuser, targetchannel, parameter, adding, type); - - /* Reset the state change flag */ - state_change = false; - } - } - } - else - { - /* No mode handler? Unknown mode character then. */ - user->WriteServ("472 %s %c :is unknown mode char to me",user->nick, modechar); - } - break; - } + if (!mh || !mh->IsListMode()) + return; + + ModResult MOD_RESULT; + FIRST_MOD_RESULT(OnRawMode, MOD_RESULT, (user, chan, mletter, "", true, 0)); + if (MOD_RESULT == MOD_RES_DENY) + continue; + + bool display = true; + if (!user->HasPrivPermission("channels/auspex") && ServerInstance->Config->HideModeLists[mletter] && (chan->GetPrefixValue(user) < HALFOP_VALUE)) + { + user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You do not have access to view the +%c list", + user->nick.c_str(), chan->name.c_str(), mletter); + display = false; } - /* Was there at least one valid mode in the sequence? */ - if (output_sequence != "") + + unsigned char handler_id = (mletter - 'A') | MASK_CHANNEL; + + for(ModeWatchIter watchers = modewatchers[handler_id].begin(); watchers != modewatchers[handler_id].end(); watchers++) { - if (servermode) - { - if (type == MODETYPE_CHANNEL) - { - targetchannel->WriteChannelWithServ(ServerInstance->Config->ServerName, "MODE %s %s%s", targetchannel->name, output_sequence.c_str(), parameter_list.str().c_str()); - } - else - { - targetuser->WriteServ("MODE %s %s",targetuser->nick,output_sequence.c_str()); - } - } - else - { - if (type == MODETYPE_CHANNEL) - { - ServerInstance->Log(DEBUG,"Write output sequence and parameters to channel: %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str()); - targetchannel->WriteChannel(user,"MODE %s %s%s",targetchannel->name,output_sequence.c_str(),parameter_list.str().c_str()); - FOREACH_MOD(I_OnMode,OnMode(user, targetchannel, TYPE_CHANNEL, output_sequence + parameter_list.str())); - } - else - { - user->WriteTo(targetuser,"MODE %s %s",targetuser->nick,output_sequence.c_str()); - FOREACH_MOD(I_OnMode,OnMode(user, targetuser, TYPE_USER, output_sequence)); - } - } + std::string dummyparam; + + if (!((*watchers)->BeforeMode(user, NULL, chan, dummyparam, true, MODETYPE_CHANNEL))) + display = false; } + if (display) + mh->DisplayList(user, chan); + else + mh->DisplayEmptyList(user, chan); } } - -void cmd_mode::Handle (const char** parameters, int pcnt, userrec *user) +const std::string& ModeParser::GetLastParse() { - if (!user) - return; - - ServerInstance->Modes->Process(parameters, pcnt, user, false); - - return; + return LastParse; } void ModeParser::CleanMask(std::string &mask) @@ -533,12 +608,15 @@ void ModeParser::CleanMask(std::string &mask) std::string::size_type pos_of_pling = mask.find_first_of('!'); std::string::size_type pos_of_at = mask.find_first_of('@'); std::string::size_type pos_of_dot = mask.find_first_of('.'); - std::string::size_type pos_of_colon = mask.find_first_of(':'); /* Because ipv6 addresses are colon delimited */ + std::string::size_type pos_of_colons = mask.find("::"); /* Because ipv6 addresses are colon delimited -- double so it treats extban as nick */ + + if (mask.length() >= 2 && mask[1] == ':') + return; // if it's an extban, don't even try guess how it needs to be formed. if ((pos_of_pling == std::string::npos) && (pos_of_at == std::string::npos)) { - /* Just a nick, or just a host */ - if ((pos_of_dot == std::string::npos) && (pos_of_colon == std::string::npos)) + /* Just a nick, or just a host - or clearly ipv6 (starting with :) */ + if ((pos_of_dot == std::string::npos) && (pos_of_colons == std::string::npos) && mask[0] != ':') { /* It has no '.' in it, it must be a nick. */ mask.append("!*@*"); @@ -561,7 +639,7 @@ void ModeParser::CleanMask(std::string &mask) } } -bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter) +bool ModeParser::AddMode(ModeHandler* mh) { unsigned char mask = 0; unsigned char pos = 0; @@ -570,13 +648,17 @@ bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter) * If they do that, thats their problem, and if i ever EVER see an * official InspIRCd developer do that, i'll beat them with a paddle! */ - if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z')) + if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z') || (mh->GetPrefix() > 126)) return false; /* A mode prefix of ',' is not acceptable, it would fuck up server to server. * A mode prefix of ':' will fuck up both server to server, and client to server. + * A mode prefix of '#' will mess up /whois and /privmsg */ - if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':')) + if ((mh->GetPrefix() == ',') || (mh->GetPrefix() == ':') || (mh->GetPrefix() == '#')) + return false; + + if (mh->GetPrefix() && FindPrefix(mh->GetPrefix())) return false; mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; @@ -586,7 +668,49 @@ bool ModeParser::AddMode(ModeHandler* mh, unsigned const char modeletter) return false; modehandlers[pos] = mh; - ServerInstance->Log(DEBUG,"ModeParser::AddMode: added mode %c",mh->GetModeChar()); + return true; +} + +bool ModeParser::DelMode(ModeHandler* mh) +{ + unsigned char mask = 0; + unsigned char pos = 0; + + if ((mh->GetModeChar() < 'A') || (mh->GetModeChar() > 'z')) + return false; + + mh->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; + pos = (mh->GetModeChar()-65) | mask; + + if (modehandlers[pos] != mh) + return false; + + /* Note: We can't stack here, as we have modes potentially being removed across many different channels. + * To stack here we have to make the algorithm slower. Discuss. + */ + switch (mh->GetModeType()) + { + case MODETYPE_USER: + for (user_hash::iterator i = ServerInstance->Users->clientlist->begin(); i != ServerInstance->Users->clientlist->end(); ) + { + User* user = i->second; + ++i; + mh->RemoveMode(user); + } + break; + case MODETYPE_CHANNEL: + for (chan_hash::iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); ) + { + // The channel may not be in the hash after RemoveMode(), see m_permchannels + Channel* chan = i->second; + ++i; + mh->RemoveMode(chan); + } + break; + } + + modehandlers[pos] = NULL; + return true; } @@ -666,7 +790,7 @@ ModeHandler* ModeParser::FindPrefix(unsigned const char pfxletter) return NULL; } -std::string ModeParser::ChanModes() +std::string ModeParser::GiveModeList(ModeMasks m) { std::string type1; /* Listmodes EXCEPT those with a prefix */ std::string type2; /* Modes that take a param when adding or removing */ @@ -675,10 +799,10 @@ std::string ModeParser::ChanModes() for (unsigned char mode = 'A'; mode <= 'z'; mode++) { - unsigned char pos = (mode-65) | MASK_CHANNEL; + unsigned char pos = (mode-65) | m; /* One parameter when adding */ if (modehandlers[pos]) - { + { if (modehandlers[pos]->GetNumParams(true)) { if ((modehandlers[pos]->IsListMode()) && (!modehandlers[pos]->GetPrefix())) @@ -708,23 +832,16 @@ std::string ModeParser::ChanModes() type4 += modehandlers[pos]->GetModeChar(); } } - } return type1 + "," + type2 + "," + type3 + "," + type4; } -bool ModeParser::PrefixComparison(const prefixtype one, const prefixtype two) -{ - return one.second > two.second; -} - -std::string ModeParser::BuildPrefixes() +std::string ModeParser::BuildPrefixes(bool lettersAndModes) { - std::string mletters = ""; - std::string mprefixes = ""; - pfxcontainer pfx; - std::map prefix_to_mode; + std::string mletters; + std::string mprefixes; + std::map > prefixes; for (unsigned char mode = 'A'; mode <= 'z'; mode++) { @@ -732,20 +849,18 @@ std::string ModeParser::BuildPrefixes() if ((modehandlers[pos]) && (modehandlers[pos]->GetPrefix())) { - pfx.push_back(std::make_pair(modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetPrefixRank())); - prefix_to_mode[modehandlers[pos]->GetPrefix()] = modehandlers[pos]->GetModeChar(); + prefixes[modehandlers[pos]->GetPrefixRank()] = std::make_pair( + modehandlers[pos]->GetPrefix(), modehandlers[pos]->GetModeChar()); } } - sort(pfx.begin(), pfx.end(), ModeParser::PrefixComparison); - - for (pfxcontainer::iterator n = pfx.begin(); n != pfx.end(); n++) + for(std::map >::reverse_iterator n = prefixes.rbegin(); n != prefixes.rend(); n++) { - mletters = mletters + n->first; - mprefixes = mprefixes + prefix_to_mode.find(n->first)->second; + mletters = mletters + n->second.first; + mprefixes = mprefixes + n->second.second; } - return "(" + mprefixes + ")" + mletters; + return lettersAndModes ? "(" + mprefixes + ")" + mletters : mletters; } bool ModeParser::AddModeWatcher(ModeWatcher* mw) @@ -763,7 +878,6 @@ bool ModeParser::AddModeWatcher(ModeWatcher* mw) pos = (mw->GetModeChar()-65) | mask; modewatchers[pos].push_back(mw); - ServerInstance->Log(DEBUG,"ModeParser::AddModeWatcher: watching mode %c",mw->GetModeChar()); return true; } @@ -776,54 +890,124 @@ bool ModeParser::DelModeWatcher(ModeWatcher* mw) if (!mw) return false; - if ((mw->GetModeType() < 'A') || (mw->GetModeType() > 'z')) + if ((mw->GetModeChar() < 'A') || (mw->GetModeChar() > 'z')) return false; mw->GetModeType() == MODETYPE_USER ? mask = MASK_USER : mask = MASK_CHANNEL; pos = (mw->GetModeChar()-65) | mask; - ModeWatchIter a = find(modewatchers[pos].begin(),modewatchers[pos].end(),mw); + ModeWatchIter a = std::find(modewatchers[pos].begin(),modewatchers[pos].end(),mw); if (a == modewatchers[pos].end()) + { return false; + } modewatchers[pos].erase(a); - ServerInstance->Log(DEBUG,"ModeParser::DelModeWatcher: stopped watching mode %c",mw->GetModeChar()); return true; } -ModeParser::ModeParser(InspIRCd* Instance) : ServerInstance(Instance) +/** This default implementation can remove simple user modes + */ +void ModeHandler::RemoveMode(User* user, irc::modestacker* stack) { - /* Clear mode list */ - memset(modehandlers, 0, sizeof(modehandlers)); - memset(modewatchers, 0, sizeof(modewatchers)); + if (user->IsModeSet(this->GetModeChar())) + { + if (stack) + { + stack->Push(this->GetModeChar()); + } + else + { + std::vector parameters; + parameters.push_back(user->nick); + parameters.push_back("-"); + parameters[1].push_back(this->GetModeChar()); + ServerInstance->Modes->Process(parameters, ServerInstance->FakeClient); + } + } +} - /* Initialise the RFC mode letters */ +/** This default implementation can remove simple channel modes + * (no parameters) + */ +void ModeHandler::RemoveMode(Channel* channel, irc::modestacker* stack) +{ + if (channel->IsModeSet(this->GetModeChar())) + { + if (stack) + { + stack->Push(this->GetModeChar()); + } + else + { + std::vector parameters; + parameters.push_back(channel->name); + parameters.push_back("-"); + parameters[1].push_back(this->GetModeChar()); + ServerInstance->SendMode(parameters, ServerInstance->FakeClient); + } + } +} - /* Start with channel simple modes, no params */ - this->AddMode(new ModeChannelSecret(Instance), 's'); - this->AddMode(new ModeChannelPrivate(Instance), 'p'); - this->AddMode(new ModeChannelModerated(Instance), 'm'); - this->AddMode(new ModeChannelTopicOps(Instance), 't'); - this->AddMode(new ModeChannelNoExternal(Instance), 'n'); - this->AddMode(new ModeChannelInviteOnly(Instance), 'i'); +struct builtin_modes +{ + ModeChannelSecret s; + ModeChannelPrivate p; + ModeChannelModerated m; + ModeChannelTopicOps t; - /* Cannel modes with params */ - this->AddMode(new ModeChannelKey(Instance), 'k'); - this->AddMode(new ModeChannelLimit(Instance), 'l'); + ModeChannelNoExternal n; + ModeChannelInviteOnly i; + ModeChannelKey k; + ModeChannelLimit l; - /* Channel listmodes */ - this->AddMode(new ModeChannelBan(Instance), 'b'); - this->AddMode(new ModeChannelOp(Instance), 'o'); - this->AddMode(new ModeChannelHalfOp(Instance), 'h'); - this->AddMode(new ModeChannelVoice(Instance), 'v'); + ModeChannelBan b; + ModeChannelOp o; + ModeChannelVoice v; + + ModeUserWallops uw; + ModeUserInvisible ui; + ModeUserOperator uo; + ModeUserServerNoticeMask us; + + void init(ModeParser* modes) + { + modes->AddMode(&s); + modes->AddMode(&p); + modes->AddMode(&m); + modes->AddMode(&t); + modes->AddMode(&n); + modes->AddMode(&i); + modes->AddMode(&k); + modes->AddMode(&l); + modes->AddMode(&b); + modes->AddMode(&o); + modes->AddMode(&v); + modes->AddMode(&uw); + modes->AddMode(&ui); + modes->AddMode(&uo); + modes->AddMode(&us); + } +}; - /* Now for usermodes */ - this->AddMode(new ModeUserServerNotice(Instance), 's'); - this->AddMode(new ModeUserWallops(Instance), 'w'); - this->AddMode(new ModeUserInvisible(Instance), 'i'); - this->AddMode(new ModeUserOperator(Instance), 'o'); - this->AddMode(new ModeUserServerNoticeMask(Instance), 'n'); +static builtin_modes static_modes; + +ModeParser::ModeParser() +{ + /* Clear mode handler list */ + memset(modehandlers, 0, sizeof(modehandlers)); + + /* Last parse string */ + LastParse.clear(); + + seq = 0; + memset(&sent, 0, sizeof(sent)); + + static_modes.init(this); } +ModeParser::~ModeParser() +{ +}