X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_redirect.cpp;h=26d6b162b9ec7009daae11c3f8645eeb4df5c6b7;hb=a5d110282a864fd2e91b51ce360a977cd0643657;hp=ee2d3f0049c98b4f006dcc24fbf8fb1018813203;hpb=bab14f0dd2345c9d7dcbc47c918563709e1ac094;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_redirect.cpp b/src/modules/m_redirect.cpp index ee2d3f004..26d6b162b 100644 --- a/src/modules/m_redirect.cpp +++ b/src/modules/m_redirect.cpp @@ -1 +1,182 @@ -/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd: (C) 2002-2007 InspIRCd Development Team * See: http://www.inspircd.org/wiki/index.php/Credits * * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #include "inspircd.h" #include "users.h" #include "channels.h" #include "modules.h" /* $ModDesc: Provides channel mode +L (limit redirection) */ /** Handle channel mode +L */ class Redirect : public ModeHandler { public: Redirect(InspIRCd* Instance) : ModeHandler(Instance, 'L', 1, 0, false, MODETYPE_CHANNEL, false) { } ModePair ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter) { if (channel->IsModeSet('L')) return std::make_pair(true, channel->GetModeParameter('L')); else return std::make_pair(false, parameter); } bool CheckTimeStamp(time_t theirs, time_t ours, const std::string &their_param, const std::string &our_param, chanrec* channel) { /* When TS is equal, the alphabetically later one wins */ return (their_param < our_param); } ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding) { if (adding) { chanrec* c = NULL; if (!ServerInstance->IsChannel(parameter.c_str())) { source->WriteServ("403 %s %s :Invalid channel name",source->nick, parameter.c_str()); parameter.clear(); return MODEACTION_DENY; } c = ServerInstance->FindChan(parameter); if (c) { /* Fix by brain: Dont let a channel be linked to *itself* either */ if (IS_LOCAL(source)) { if ((c == channel) || (c->IsModeSet('L'))) { source->WriteServ("690 %s :Circular or chained +L to %s not allowed (Channel already has +L). Pack of wild dogs has been unleashed.",source->nick,parameter.c_str()); parameter.clear(); return MODEACTION_DENY; } else { for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++) { if ((i->second != channel) && (i->second->IsModeSet('L')) && (irc::string(i->second->GetModeParameter('L').c_str()) == irc::string(channel->name))) { source->WriteServ("690 %s :Circular or chained +L to %s not allowed (Already forwarded here from %s). Angry monkeys dispatched.",source->nick,parameter.c_str(),i->second->name); return MODEACTION_DENY; } } } } } channel->SetMode('L', true); channel->SetModeParam('L', parameter.c_str(), true); return MODEACTION_ALLOW; } else { if (channel->IsModeSet('L')) { channel->SetMode('L', false); return MODEACTION_ALLOW; } } return MODEACTION_DENY; } }; class ModuleRedirect : public Module { Redirect* re; public: ModuleRedirect(InspIRCd* Me) : Module(Me) { re = new Redirect(ServerInstance); if (!ServerInstance->AddMode(re, 'L')) throw ModuleException("Could not add new modes!"); } void Implements(char* List) { List[I_OnUserPreJoin] = 1; } virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname, std::string &privs) { if (chan) { if (chan->IsModeSet('L') && chan->limit) { if (chan->GetUserCounter() >= chan->limit) { std::string channel = chan->GetModeParameter('L'); /* sometimes broken ulines can make circular or chained +L, avoid this */ chanrec* destchan = NULL; destchan = ServerInstance->FindChan(channel); if (destchan && destchan->IsModeSet('L')) { user->WriteServ("470 %s :%s is full, but has a circular redirect (+L), not following redirection to %s", user->nick, cname, channel.c_str()); return 1; } user->WriteServ("470 %s :%s has become full, so you are automatically being transferred to the linked channel %s", user->nick, cname, channel.c_str()); chanrec::JoinUser(ServerInstance, user, channel.c_str(), false, "", ServerInstance->Time(true)); return 1; } } } return 0; } virtual ~ModuleRedirect() { ServerInstance->Modes->DelMode(re); DELETE(re); } virtual Version GetVersion() { return Version(1, 1, 0, 0, VF_COMMON | VF_VENDOR, API_VERSION); } }; MODULE_INIT(ModuleRedirect) \ No newline at end of file +/* + * InspIRCd -- Internet Relay Chat Daemon + * + * Copyright (C) 2012 Shawn Smith + * Copyright (C) 2009 Daniel De Graaf + * Copyright (C) 2007-2008 Robin Burchell + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2004, 2006 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 . + */ + + +#include "inspircd.h" + +/* $ModDesc: Provides channel mode +L (limit redirection) and usermode +L (no forced redirection) */ + +/** Handle channel mode +L + */ +class Redirect : public ModeHandler +{ + public: + Redirect(Module* Creator) : ModeHandler(Creator, "redirect", 'L', PARAM_SETONLY, MODETYPE_CHANNEL) { } + + ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) + { + if (adding) + { + if (IS_LOCAL(source)) + { + if (!ServerInstance->IsChannel(parameter.c_str(), ServerInstance->Config->Limits.ChanMax)) + { + source->WriteNumeric(403, "%s %s :Invalid channel name", source->nick.c_str(), parameter.c_str()); + parameter.clear(); + return MODEACTION_DENY; + } + } + + if (IS_LOCAL(source) && !IS_OPER(source)) + { + Channel* c = ServerInstance->FindChan(parameter); + if (!c) + { + source->WriteNumeric(690, "%s :Target channel %s must exist to be set as a redirect.",source->nick.c_str(),parameter.c_str()); + parameter.clear(); + return MODEACTION_DENY; + } + else if (c->GetPrefixValue(source) < OP_VALUE) + { + source->WriteNumeric(690, "%s :You must be opped on %s to set it as a redirect.",source->nick.c_str(),parameter.c_str()); + parameter.clear(); + return MODEACTION_DENY; + } + } + + if (channel->GetModeParameter('L') == parameter) + return MODEACTION_DENY; + /* + * We used to do some checking for circular +L here, but there is no real need for this any more especially as we + * now catch +L looping in PreJoin. Remove it, since O(n) logic makes me sad, and we catch it anyway. :) -- w00t + */ + channel->SetModeParam('L', parameter); + return MODEACTION_ALLOW; + } + else + { + if (channel->IsModeSet('L')) + { + channel->SetModeParam('L', ""); + return MODEACTION_ALLOW; + } + } + + return MODEACTION_DENY; + + } +}; + +/** Handles usermode +L to stop forced redirection and print an error. +*/ +class AntiRedirect : public SimpleUserModeHandler +{ + public: + AntiRedirect(Module* Creator) : SimpleUserModeHandler(Creator, "antiredirect", 'L') {} +}; + +class ModuleRedirect : public Module +{ + + Redirect re; + AntiRedirect re_u; + bool UseUsermode; + + public: + + ModuleRedirect() + : re(this), re_u(this) + { + } + + void init() + { + /* Setting this here so it isn't changable by rehasing the config later. */ + UseUsermode = ServerInstance->Config->ConfValue("redirect")->getBool("antiredirect"); + + /* Channel mode */ + ServerInstance->Modules->AddService(re); + + /* Check to see if the usermode is enabled in the config */ + if (UseUsermode) + { + /* Log noting that this breaks compatability. */ + ServerInstance->Logs->Log("m_redirect", DEFAULT, "REDIRECT: Enabled usermode +L. This breaks linking with servers that do not have this enabled. This is disabled by default in the 2.0 branch but will be enabled in the next version."); + + /* Try to add the usermode */ + ServerInstance->Modules->AddService(re_u); + } + + Implementation eventlist[] = { I_OnUserPreJoin }; + ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); + } + + virtual ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven) + { + if (chan) + { + if (chan->IsModeSet('L') && chan->IsModeSet('l')) + { + if (chan->GetUserCounter() >= ConvToInt(chan->GetModeParameter('l'))) + { + std::string channel = chan->GetModeParameter('L'); + + /* sometimes broken ulines can make circular or chained +L, avoid this */ + Channel* destchan = NULL; + destchan = ServerInstance->FindChan(channel); + if (destchan && destchan->IsModeSet('L')) + { + user->WriteNumeric(470, "%s %s * :You may not join this channel. A redirect is set, but you may not be redirected as it is a circular loop.", user->nick.c_str(), cname); + return MOD_RES_DENY; + } + /* We check the bool value here to make sure we have it enabled, if we don't then + usermode +L might be assigned to something else. */ + if (UseUsermode && user->IsModeSet('L')) + { + user->WriteNumeric(470, "%s %s %s :Force redirection stopped.", + user->nick.c_str(), cname, channel.c_str()); + return MOD_RES_DENY; + } + else + { + user->WriteNumeric(470, "%s %s %s :You may not join this channel, so you are automatically being transferred to the redirect channel.", user->nick.c_str(), cname, channel.c_str()); + Channel::JoinUser(user, channel.c_str(), false, "", false, ServerInstance->Time()); + return MOD_RES_DENY; + } + } + } + } + return MOD_RES_PASSTHRU; + } + + virtual ~ModuleRedirect() + { + } + + virtual Version GetVersion() + { + return Version("Provides channel mode +L (limit redirection) and user mode +L (no forced redirection)", VF_VENDOR); + } +}; + +MODULE_INIT(ModuleRedirect)