X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_permchannels.cpp;h=e86b3cbf6d171dece2453c8e50e110680ad9c980;hb=4c751dbbe8945e5efc230a59b0ed51c2ba10cf92;hp=7cd0b4914af46dd334ec1fee37a0c5f7ba4984ef;hpb=fd3898589e42f62c008bc958ba74adff5781a551;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_permchannels.cpp b/src/modules/m_permchannels.cpp index 7cd0b4914..e86b3cbf6 100644 --- a/src/modules/m_permchannels.cpp +++ b/src/modules/m_permchannels.cpp @@ -1,36 +1,185 @@ -/* +------------------------------------+ - * | 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 */ +struct ListModeData +{ + std::string modes; + std::string params; +}; + +// Not in a class due to circular dependancy hell. +static std::string permchannelsconf; +static bool WriteDatabase(Module* mod, bool save_listmodes) +{ + FILE *f; + + if (permchannelsconf.empty()) + { + // Fake success. + return true; + } + + std::string tempname = permchannelsconf + ".tmp"; + + /* + * We need to perform an atomic write so as not to fuck things up. + * So, let's write to a temporary file, flush and sync the FD, then rename the file.. + * -- w00t + */ + f = fopen(tempname.c_str(), "w"); + if (!f) + { + ServerInstance->Logs->Log("m_permchannels",DEFAULT, "permchannels: Cannot create database! %s (%d)", strerror(errno), errno); + ServerInstance->SNO->WriteToSnoMask('a', "database: cannot create new db: %s (%d)", strerror(errno), errno); + return false; + } + + fputs("# Permchannels DB\n# This file is autogenerated; any changes will be overwritten!\n\n", f); + // Now, let's write. + std::string line; + for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++) + { + Channel* chan = i->second; + if (!chan->IsModeSet('P')) + continue; + + std::string chanmodes = chan->ChanModes(true); + if (save_listmodes) + { + ListModeData lm; + + // Bans are managed by the core, so we have to process them separately + lm.modes = std::string(chan->bans.size(), 'b'); + for (BanList::const_iterator j = chan->bans.begin(); j != chan->bans.end(); ++j) + { + lm.params += j->data; + lm.params += ' '; + } + + // All other listmodes are managed by modules, so we need to ask them (call their + // OnSyncChannel() handler) to give our ProtoSendMode() a list of modes that are + // set on the channel. The ListModeData struct is passed as an opaque pointer + // that will be passed back to us by the module handling the mode. + FOREACH_MOD(I_OnSyncChannel, OnSyncChannel(chan, mod, &lm)); + + if (!lm.modes.empty()) + { + // Remove the last space + lm.params.erase(lm.params.end()-1); + + // If there is at least a space in chanmodes (that is, a non-listmode has a parameter) + // insert the listmode mode letters before the space. Otherwise just append them. + std::string::size_type p = chanmodes.find(' '); + if (p == std::string::npos) + chanmodes += lm.modes; + else + chanmodes.insert(p, lm.modes); + + // Append the listmode parameters (the masks themselves) + chanmodes += ' '; + chanmodes += lm.params; + } + } + + std::string chants = ConvToStr(chan->age); + std::string topicts = ConvToStr(chan->topicset); + const char* items[] = + { + "\n" + }; + + line.clear(); + int item = 0, ipos = 0; + while (item < 13) + { + char c = items[item][ipos++]; + if (c == 0) + { + // end of this string; hop to next string, insert a quote + item++; + ipos = 0; + c = '"'; + } + else if (c == '\\' || c == '"') + { + line += '\\'; + } + line += c; + } + + // Erase last '"' + line.erase(line.end()-1); + fputs(line.c_str(), f); + } + + int write_error = 0; + write_error = ferror(f); + write_error |= fclose(f); + if (write_error) + { + ServerInstance->Logs->Log("m_permchannels",DEFAULT, "permchannels: 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; + } + +#ifdef _WIN32 + remove(permchannelsconf.c_str()); +#endif + // Use rename to move temporary to new db - this is guarenteed not to fuck up, even in case of a crash. + if (rename(tempname.c_str(), permchannelsconf.c_str()) < 0) + { + ServerInstance->Logs->Log("m_permchannels",DEFAULT, "permchannels: 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; +} + + /** Handles the +P channel mode */ 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, bool sm) + ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) { - if (!source->HasPrivPermission("channels/set-permanent")) - { - source->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - You do not have the required operator privileges", source->nick.c_str()); - return MODEACTION_DENY; - } - if (adding) { if (!channel->IsModeSet('P')) @@ -43,30 +192,11 @@ class PermChannel : public ModeHandler { if (channel->IsModeSet('P')) { - if (channel->GetUserCounter() == 0 && !sm) + channel->SetMode(this,false); + if (channel->GetUserCounter() == 0) { - /* - * ugh, ugh, UGH! - * - * We can't delete this channel the way things work at the moment, - * because of the following scenario: - * s1:#c <-> s2:#c - * - * s1 has a user in #c, s2 does not. s2 has +P set. s2 has a losing TS. - * - * On netmerge, s2 loses, so s2 removes all modes (including +P) which - * would subsequently delete the channel here causing big fucking problems. - * - * I don't think there's really a way around this, so just deny -P on a 0 user chan. - * -- w00t - * - * delete channel; - */ - return MODEACTION_DENY; + channel->DelUser(ServerInstance->FakeClient); } - - /* for servers, remove +P (to avoid desyncs) but don't bother trying to delete. */ - channel->SetMode('P',false); return MODEACTION_ALLOW; } } @@ -77,45 +207,76 @@ class PermChannel : public ModeHandler class ModulePermanentChannels : public Module { - PermChannel *p; + PermChannel p; + bool dirty; + bool loaded; + bool save_listmodes; public: - ModulePermanentChannels(InspIRCd* Me) : Module(Me) + ModulePermanentChannels() + : p(this), dirty(false), loaded(false) + { + } + + void init() { - p = new PermChannel(ServerInstance); - if (!ServerInstance->Modes->AddMode(p)) + 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()) { - delete p; - throw ModuleException("Could not add new modes!"); + Channel* c = iter->second; + if (c->GetUserCounter() == 0) + { + chan_hash::iterator at = iter; + iter++; + FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(c)); + ServerInstance->chanlist->erase(at); + ServerInstance->GlobalCulls.AddItem(c); + } + else + iter++; } - Implementation eventlist[] = { I_OnChannelPreDelete }; - ServerInstance->Modules->Attach(eventlist, this, 1); - - OnRehash(NULL, ""); + ServerInstance->Modes->DelMode(&p); + return Module::cull(); } - virtual ~ModulePermanentChannels() + virtual void OnRehash(User *user) { - ServerInstance->Modes->DelMode(p); - delete p; + ConfigTag* tag = ServerInstance->Config->ConfValue("permchanneldb"); + permchannelsconf = tag->getString("filename"); + save_listmodes = tag->getBool("listmodes"); } - virtual void OnRehash(User *user, const std::string ¶meter) + void LoadDatabase() { /* * Process config-defined list of permanent channels. * -- w00t */ - ConfigReader MyConf(ServerInstance); - for (int i = 0; i < MyConf.Enumerate("permchannels"); i++) + ConfigTagList permchannels = ServerInstance->Config->ConfTags("permchannels"); + for (ConfigIter i = permchannels.first; i != permchannels.second; ++i) { - std::string channel = MyConf.ReadValue("permchannels", "channel", i); - std::string topic = MyConf.ReadValue("permchannels", "topic", i); - std::string modes = MyConf.ReadValue("permchannels", "modes", i); + 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()) + if ((channel.empty()) || (channel.length() > ServerInstance->Config->Limits.ChanMax)) { - ServerInstance->Logs->Log("blah", DEBUG, "Malformed permchannels tag with empty channel name."); + ServerInstance->Logs->Log("m_permchannels", DEFAULT, "Ignoring permchannels tag with empty or too long channel name (\"" + channel + "\")"); continue; } @@ -123,10 +284,19 @@ public: if (!c) { - c = new Channel(ServerInstance, channel, ServerInstance->Time()); - if (!topic.empty()) - c->SetTopic(NULL, topic, true); - ServerInstance->Logs->Log("blah", DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str()); + time_t TS = tag->getInt("ts"); + c = new Channel(channel, ((TS > 0) ? TS : ServerInstance->Time())); + + c->SetTopic(NULL, topic, true); + c->setby = tag->getString("topicsetby"); + if (c->setby.empty()) + c->setby = ServerInstance->Config->ServerName; + unsigned int topicset = tag->getInt("topicts"); + // SetTopic() sets the topic TS to now, if there was no topicts saved then don't overwrite that with a 0 + if (topicset > 0) + c->topicset = topicset; + + ServerInstance->Logs->Log("m_permchannels", DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str()); if (modes.empty()) continue; @@ -155,17 +325,87 @@ public: } } + virtual ModResult OnRawMode(User* user, Channel* chan, const char mode, const std::string ¶m, bool adding, int pcnt) + { + if (chan && (chan->IsModeSet('P') || mode == 'P')) + dirty = true; + + return MOD_RES_PASSTHRU; + } + + virtual void OnPostTopicChange(User*, Channel *c, const std::string&) + { + if (c->IsModeSet('P')) + dirty = true; + } + + void OnBackgroundTimer(time_t) + { + if (dirty) + WriteDatabase(this, save_listmodes); + dirty = false; + } + + void Prioritize() + { + // 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 + 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("m_permchannels", DEFAULT, "Error loading permchannels database: " + std::string(e.GetReason())); + } + } + } + + void ProtoSendMode(void* opaque, TargetTypeFlags type, void* target, const std::vector& modes, const std::vector& translate) + { + // We never pass an empty modelist but better be sure + if (modes.empty()) + return; + + ListModeData* lm = static_cast(opaque); + + // Append the mode letters without the trailing '+' (for example "IIII", "gg") + lm->modes.append(modes[0].begin()+1, modes[0].end()); + + // Append the parameters + for (std::vector::const_iterator i = modes.begin()+1; i != modes.end(); ++i) + { + lm->params += *i; + lm->params += ' '; + } + } + virtual Version GetVersion() { - return Version("$Id$",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) + virtual ModResult OnChannelPreDelete(Channel *c) { if (c->IsModeSet('P')) - return 1; + return MOD_RES_DENY; - return 0; + return MOD_RES_PASSTHRU; } };