X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_permchannels.cpp;h=36dff7a40141d8cbfa028ca2981270ff98d66ac2;hb=8710724b5518ae9858309e548514f76e620a8459;hp=357db554f6a9d181fb73c22c928525ffd0754ec0;hpb=ece985ccb3210a132d67381511642edfb359f5c4;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_permchannels.cpp b/src/modules/m_permchannels.cpp index 357db554f..36dff7a40 100644 --- a/src/modules/m_permchannels.cpp +++ b/src/modules/m_permchannels.cpp @@ -1,19 +1,25 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2008 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2008-2009 Robin Burchell * - * This program is free but copyrighted software; see - * the file COPYING for details. + * 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 support for channel mode +P to provide permanent channels */ +#include "inspircd.h" +#include /** Handles the +P channel mode @@ -21,65 +27,270 @@ class PermChannel : public ModeHandler { public: - PermChannel(InspIRCd* Instance) : ModeHandler(Instance, 'P', 0, 0, false, MODETYPE_CHANNEL, false) { } + PermChannel(Module* Creator) + : ModeHandler(Creator, "permanent", 'P', PARAM_NONE, MODETYPE_CHANNEL) + { + oper = true; + } - ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) + ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string& parameter, bool adding) { - if (adding) + if (adding == channel->IsModeSet(this)) + return MODEACTION_DENY; + + channel->SetMode(this, adding); + if (!adding) + channel->CheckDestroy(); + + return MODEACTION_ALLOW; + } +}; + +// Not in a class due to circular dependancy hell. +static std::string permchannelsconf; +static bool WriteDatabase(PermChannel& permchanmode) +{ + /* + * We need to perform an atomic write so as not to fuck things up. + * So, let's write to a temporary file, flush it, then rename the file.. + * -- w00t + */ + + // If the user has not specified a configuration file then we don't write one. + if (permchannelsconf.empty()) + return true; + + std::string permchannelsnewconf = permchannelsconf + ".tmp"; + std::ofstream stream(permchannelsnewconf.c_str()); + if (!stream.is_open()) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Cannot create database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot create new db: %s (%d)", strerror(errno), errno); + return false; + } + + stream << "# This file is automatically generated by m_permchannels. Any changes will be overwritten." << std::endl + << "" << std::endl; + + for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++) + { + Channel* chan = i->second; + if (!chan->IsModeSet(permchanmode)) + continue; + + stream << "name) + << "\" topic=\"" << ServerConfig::Escape(chan->topic) + << "\" modes=\"" << ServerConfig::Escape(chan->ChanModes(true)) + << "\">" << std::endl; + } + + if (stream.fail()) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Cannot write to new database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot write to new db: %s (%d)", strerror(errno), errno); + return false; + } + stream.close(); + +#ifdef _WIN32 + if (remove(permchannelsconf.c_str())) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Cannot remove old database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot remove old database: %s (%d)", strerror(errno), errno); + return false; + } +#endif + // Use rename to move temporary to new db - this is guarenteed not to fuck up, even in case of a crash. + if (rename(permchannelsnewconf.c_str(), permchannelsconf.c_str()) < 0) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Cannot move new to old database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot replace old with new db: %s (%d)", strerror(errno), errno); + return false; + } + + return true; +} + +class ModulePermanentChannels : public Module +{ + PermChannel p; + bool dirty; +public: + + ModulePermanentChannels() : p(this), dirty(false) + { + } + + void init() CXX11_OVERRIDE + { + ServerInstance->Modules->AddService(p); + Implementation eventlist[] = { I_OnChannelPreDelete, I_OnPostTopicChange, I_OnRawMode, I_OnRehash, I_OnBackgroundTimer }; + ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); + + OnRehash(NULL); + } + + CullResult cull() + { + /* + * DelMode can't remove the +P mode on empty channels, or it will break + * merging modes with remote servers. Remove the empty channels now as + * we know this is not the case. + */ + chan_hash::iterator iter = ServerInstance->chanlist->begin(); + while (iter != ServerInstance->chanlist->end()) { - if (!channel->IsModeSet('P')) + Channel* c = iter->second; + if (c->GetUserCounter() == 0) { - channel->SetMode('P',true); - return MODEACTION_ALLOW; + chan_hash::iterator at = iter; + iter++; + FOREACH_MOD(OnChannelDelete, (c)); + ServerInstance->chanlist->erase(at); + ServerInstance->GlobalCulls.AddItem(c); } + else + iter++; } - else + ServerInstance->Modes->DelMode(&p); + return Module::cull(); + } + + void OnRehash(User *user) CXX11_OVERRIDE + { + permchannelsconf = ServerInstance->Config->ConfValue("permchanneldb")->getString("filename"); + } + + void LoadDatabase() + { + /* + * Process config-defined list of permanent channels. + * -- w00t + */ + ConfigTagList permchannels = ServerInstance->Config->ConfTags("permchannels"); + for (ConfigIter i = permchannels.first; i != permchannels.second; ++i) { - if (channel->IsModeSet('P')) + ConfigTag* tag = i->second; + std::string channel = tag->getString("channel"); + std::string topic = tag->getString("topic"); + std::string modes = tag->getString("modes"); + + if (channel.empty()) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Malformed permchannels tag with empty channel name."); + continue; + } + + Channel *c = ServerInstance->FindChan(channel); + + if (!c) { - channel->SetMode('P',false); - return MODEACTION_ALLOW; + c = new Channel(channel, ServerInstance->Time()); + if (!topic.empty()) + { + c->SetTopic(ServerInstance->FakeClient, topic); + + /* + * Due to the way protocol works in 1.2, we need to hack the topic TS in such a way that this + * topic will always win over others. + * + * This is scheduled for (proper) fixing in a later release, and can be removed at a later date. + */ + c->topicset = 42; + } + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str()); + + if (modes.empty()) + continue; + + irc::spacesepstream list(modes); + std::string modeseq; + std::string par; + + list.GetToken(modeseq); + + // XXX bleh, should we pass this to the mode parser instead? ugly. --w00t + for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n) + { + ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL); + if (mode) + { + if (mode->GetNumParams(true)) + list.GetToken(par); + else + par.clear(); + + mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, c, par, true); + } + } } } + } + + ModResult OnRawMode(User* user, Channel* chan, const char mode, const std::string ¶m, bool adding, int pcnt) CXX11_OVERRIDE + { + if (chan && (chan->IsModeSet(p) || mode == p.GetModeChar())) + dirty = true; - return MODEACTION_DENY; + return MOD_RES_PASSTHRU; } -}; -class ModulePermanentChannels : public Module -{ - PermChannel *p; -public: - - ModulePermanentChannels(InspIRCd* Me) : Module(Me) + void OnPostTopicChange(User*, Channel *c, const std::string&) CXX11_OVERRIDE { - p = new PermChannel(ServerInstance); - if (!ServerInstance->Modes->AddMode(p)) - { - delete p; - throw ModuleException("Could not add new modes!"); - } - Implementation eventlist[] = { I_OnChannelPreDelete }; - ServerInstance->Modules->Attach(eventlist, this, 1); + if (c->IsModeSet(p)) + dirty = true; + } + + void OnBackgroundTimer(time_t) CXX11_OVERRIDE + { + if (dirty) + WriteDatabase(p); + dirty = false; } - virtual ~ModulePermanentChannels() + void Prioritize() { - ServerInstance->Modes->DelMode(p); - delete p; + // XXX: Load the DB here because the order in which modules are init()ed at boot is + // alphabetical, this means we must wait until all modules have done their init() + // to be able to set the modes they provide (e.g.: m_stripcolor is inited after us) + // Prioritize() is called after all module initialization is complete, consequently + // all modes are available now + + static bool loaded = false; + if (loaded) + return; + + loaded = true; + + // Load only when there are no linked servers - we set the TS of the channels we + // create to the current time, this can lead to desync because spanningtree has + // no way of knowing what we do + ProtoServerList serverlist; + ServerInstance->PI->GetServerList(serverlist); + if (serverlist.size() < 2) + { + try + { + LoadDatabase(); + } + catch (CoreException& e) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error loading permchannels database: " + std::string(e.GetReason())); + } + } } - virtual Version GetVersion() + Version GetVersion() CXX11_OVERRIDE { - return Version(1,1,0,0,VF_COMMON|VF_VENDOR,API_VERSION); + return Version("Provides support for channel mode +P to provide permanent channels",VF_VENDOR); } - virtual int OnChannelPreDelete(Channel *c) + ModResult OnChannelPreDelete(Channel *c) CXX11_OVERRIDE { - if (c->IsModeSet('P')) - return 1; + if (c->IsModeSet(p)) + return MOD_RES_DENY; - return 0; + return MOD_RES_PASSTHRU; } };