X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_permchannels.cpp;h=3e2e18a8e73abf6f9b14d4bf2e0960cc1afead01;hb=6d03943426dcce76ba66567a9b18425a5ebb4c0c;hp=304192ca820854f48d48e5622bcaf57410b77039;hpb=d185decae97752368d5cf62311cbc0d1a52aa22c;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_permchannels.cpp b/src/modules/m_permchannels.cpp index 304192ca8..3e2e18a8e 100644 --- a/src/modules/m_permchannels.cpp +++ b/src/modules/m_permchannels.cpp @@ -2,8 +2,8 @@ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * - * InspIRCd: (C) 2002-2008 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * InspIRCd: (C) 2002-2009 InspIRCd Development Team + * See: http://wiki.inspircd.org/Credits * * This program is free but copyrighted software; see * the file COPYING for details. @@ -15,21 +15,119 @@ /* $ModDesc: Provides support for channel mode +P to provide permanent channels */ +// Not in a class due to circular dependancy hell. +static std::string permchannelsconf; +static bool WriteDatabase() +{ + 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; + } + + // Now, let's write. + for (chan_hash::const_iterator i = ServerInstance->chanlist->begin(); i != ServerInstance->chanlist->end(); i++) + { + Channel* chan = i->second; + if (!chan->IsModeSet('P')) + continue; + + char line[1024]; + const char* items[] = + { + "\n" + }; + + int lpos = 0, item = 0, ipos = 0; + while (lpos < 1022 && item < 7) + { + 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[lpos++] = '\\'; + } + line[lpos++] = c; + } + line[--lpos] = 0; + fputs(line, 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; + } + + // 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, 'P', PARAM_NONE, MODETYPE_CHANNEL) { } - ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding, bool) + 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')) { channel->SetMode('P',true); + + // Save permchannels db if needed. + WriteDatabase(); return MODEACTION_ALLOW; } } @@ -37,7 +135,33 @@ class PermChannel : public ModeHandler { if (channel->IsModeSet('P')) { + if (channel->GetUserCounter() == 0 && !IS_FAKE(source)) + { + /* + * 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; + } + + /* for servers, remove +P (to avoid desyncs) but don't bother trying to delete. */ channel->SetMode('P',false); + + // Save permchannels db if needed. + WriteDatabase(); return MODEACTION_ALLOW; } } @@ -48,38 +172,136 @@ class PermChannel : public ModeHandler class ModulePermanentChannels : public Module { - PermChannel *p; + PermChannel p; public: - ModulePermanentChannels(InspIRCd* Me) : Module(Me) + ModulePermanentChannels() : p(this) { - p = new PermChannel(ServerInstance); - if (!ServerInstance->Modes->AddMode(p)) - { - delete p; + if (!ServerInstance->Modes->AddMode(&p)) throw ModuleException("Could not add new modes!"); - } - Implementation eventlist[] = { I_OnChannelPreDelete }; - ServerInstance->Modules->Attach(eventlist, this, 1); + Implementation eventlist[] = { I_OnChannelPreDelete, I_OnPostTopicChange, I_OnRawMode }; + ServerInstance->Modules->Attach(eventlist, this, 3); + + OnRehash(NULL); } virtual ~ModulePermanentChannels() { - ServerInstance->Modes->DelMode(p); - delete p; + ServerInstance->Modes->DelMode(&p); + /* + * 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()) + { + Channel* c = iter->second; + if (c->GetUserCounter() == 0) + { + chan_hash::iterator at = iter; + iter++; + ServerInstance->chanlist->erase(at); + delete c; + } + else + iter++; + } + } + + virtual void OnRehash(User *user) + { + /* + * Process config-defined list of permanent channels. + * -- w00t + */ + ConfigReader MyConf; + + permchannelsconf = MyConf.ReadValue("permchanneldb", "filename", "", 0, false); + + for (int i = 0; i < MyConf.Enumerate("permchannels"); 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); + + if (channel.empty()) + { + ServerInstance->Logs->Log("blah", DEBUG, "Malformed permchannels tag with empty channel name."); + continue; + } + + Channel *c = ServerInstance->FindChan(channel); + + if (!c) + { + c = new Channel(channel, ServerInstance->Time()); + if (!topic.empty()) + { + c->SetTopic(NULL, topic, true); + + /* + * 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("blah", 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); + } + } + } + } + } + + virtual ModResult OnRawMode(User* user, Channel* chan, const char mode, const std::string ¶m, bool adding, int pcnt) + { + if (chan && chan->IsModeSet('P')) + WriteDatabase(); + + return MOD_RES_PASSTHRU; + } + + virtual void OnPostTopicChange(User*, Channel *c, const std::string&) + { + if (c->IsModeSet('P')) + WriteDatabase(); } virtual Version GetVersion() { - return Version(1,2,0,0,VF_COMMON|VF_VENDOR,API_VERSION); + return Version("Provides support for channel mode +P to provide permanent channels",VF_COMMON|VF_VENDOR,API_VERSION); } - 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; } };