/*
* InspIRCd -- Internet Relay Chat Daemon
*
+ * Copyright (C) 2019 Matt Schatz <genius3000@g3k.solutions>
+ * Copyright (C) 2013, 2018 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2012-2013 Attila Molnar <attilamolnar@hush.com>
+ * Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ * Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
- * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
- * Copyright (C) 2005 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2005, 2007, 2010 Craig Edwards <brain@inspircd.org>
*
* 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
#include "inspircd.h"
-/* $ModDesc: Implements config tags which allow blocking of joins to channels */
+enum
+{
+ // InspIRCd-specific.
+ ERR_BADCHANNEL = 926
+};
+
+struct BadChannel
+{
+ bool allowopers;
+ std::string name;
+ std::string reason;
+ std::string redirect;
+
+ BadChannel(const std::string& Name, const std::string& Redirect, const std::string& Reason, bool AllowOpers)
+ : allowopers(AllowOpers)
+ , name(Name)
+ , reason(Reason)
+ , redirect(Redirect)
+ {
+ }
+};
+
+typedef std::vector<BadChannel> BadChannels;
+typedef std::vector<std::string> GoodChannels;
class ModuleDenyChannels : public Module
{
+ private:
+ BadChannels badchannels;
+ GoodChannels goodchannels;
+ UserModeReference antiredirectmode;
+ ChanModeReference redirectmode;
+
public:
- void init()
+ ModuleDenyChannels()
+ : antiredirectmode(this, "antiredirect")
+ , redirectmode(this, "redirect")
{
- Implementation eventlist[] = { I_OnUserPreJoin, I_OnRehash };
- ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
}
- virtual void OnRehash(User* user)
+ void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
- /* check for redirect validity and loops/chains */
- ConfigTagList tags = ServerInstance->Config->ConfTags("badchan");
+ GoodChannels goodchans;
+ ConfigTagList tags = ServerInstance->Config->ConfTags("goodchan");
+ for (ConfigIter iter = tags.first; iter != tags.second; ++iter)
+ {
+ ConfigTag* tag = iter->second;
+
+ // Ensure that we have the <goodchan:name> parameter.
+ const std::string name = tag->getString("name");
+ if (name.empty())
+ throw ModuleException("<goodchan:name> is a mandatory field, at " + tag->getTagLocation());
+
+ goodchans.push_back(name);
+ }
+
+ BadChannels badchans;
+ tags = ServerInstance->Config->ConfTags("badchan");
for (ConfigIter i = tags.first; i != tags.second; ++i)
{
- std::string name = i->second->getString("name");
- std::string redirect = i->second->getString("redirect");
+ ConfigTag* tag = i->second;
+
+ // Ensure that we have the <badchan:name> parameter.
+ const std::string name = tag->getString("name");
+ if (name.empty())
+ throw ModuleException("<badchan:name> is a mandatory field, at " + tag->getTagLocation());
+ // Ensure that we have the <badchan:reason> parameter.
+ const std::string reason = tag->getString("reason");
+ if (reason.empty())
+ throw ModuleException("<badchan:reason> is a mandatory field, at " + tag->getTagLocation());
+
+ const std::string redirect = tag->getString("redirect");
if (!redirect.empty())
{
+ // Ensure that <badchan:redirect> contains a channel name.
+ if (!ServerInstance->IsChannel(redirect))
+ throw ModuleException("<badchan:redirect> is not a valid channel name, at " + tag->getTagLocation());
- if (!ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
- {
- if (user)
- user->WriteServ("NOTICE %s :Invalid badchan redirect '%s'", user->nick.c_str(), redirect.c_str());
- throw ModuleException("Invalid badchan redirect, not a channel");
- }
+ // We defer the rest of the validation of the redirect channel until we have
+ // finished parsing all of the badchans.
+ }
+
+ badchans.push_back(BadChannel(name, redirect, reason, tag->getBool("allowopers")));
+ }
+
+ // Now we have all of the badchan information recorded we can check that all redirect
+ // channels can actually be redirected to.
+ for (BadChannels::const_iterator i = badchans.begin(); i != badchans.end(); ++i)
+ {
+ const BadChannel& badchan = *i;
- for (ConfigIter j = tags.first; j != tags.second; ++j)
+ // If there is no redirect channel we have nothing to do.
+ if (badchan.redirect.empty())
+ continue;
+
+ // If the redirect channel is whitelisted then it is okay.
+ bool whitelisted = false;
+ for (GoodChannels::const_iterator j = goodchans.begin(); j != goodchans.end(); ++j)
+ {
+ if (InspIRCd::Match(badchan.redirect, *j))
{
- if (InspIRCd::Match(redirect, j->second->getString("name")))
- {
- bool goodchan = false;
- ConfigTagList goodchans = ServerInstance->Config->ConfTags("badchan");
- for (ConfigIter k = goodchans.first; k != goodchans.second; ++k)
- {
- if (InspIRCd::Match(redirect, k->second->getString("name")))
- goodchan = true;
- }
-
- if (!goodchan)
- {
- /* <badchan:redirect> is a badchan */
- if (user)
- user->WriteServ("NOTICE %s :Badchan %s redirects to badchan %s", user->nick.c_str(), name.c_str(), redirect.c_str());
- throw ModuleException("Badchan redirect loop");
- }
- }
+ whitelisted = true;
+ break;
}
}
+
+ if (whitelisted)
+ continue;
+
+ // If the redirect channel is not blacklisted then it is okay.
+ for (BadChannels::const_iterator j = badchans.begin(); j != badchans.end(); ++j)
+ if (InspIRCd::Match(badchan.redirect, j->name))
+ throw ModuleException("<badchan:redirect> cannot be a blacklisted channel name");
}
- }
- virtual ~ModuleDenyChannels()
- {
+ // The config file contained no errors so we can apply the new configuration.
+ badchannels.swap(badchans);
+ goodchannels.swap(goodchans);
}
- virtual Version GetVersion()
+ Version GetVersion() CXX11_OVERRIDE
{
- return Version("Implements config tags which allow blocking of joins to channels", VF_VENDOR);
+ return Version("Allows the server administrator to prevent users from joining channels matching a glob.", VF_VENDOR);
}
- virtual ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
+ ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
{
- ConfigTagList tags = ServerInstance->Config->ConfTags("badchan");
- for (ConfigIter j = tags.first; j != tags.second; ++j)
+ for (BadChannels::const_iterator j = badchannels.begin(); j != badchannels.end(); ++j)
{
- if (InspIRCd::Match(cname, j->second->getString("name")))
- {
- if (IS_OPER(user) && j->second->getBool("allowopers"))
- {
+ const BadChannel& badchan = *j;
+
+ // If the channel does not match the current entry we have nothing else to do.
+ if (!InspIRCd::Match(cname, badchan.name))
+ continue;
+
+ // If the user is an oper and opers are allowed to enter this blacklisted channel
+ // then allow the join.
+ if (user->IsOper() && badchan.allowopers)
+ return MOD_RES_PASSTHRU;
+
+ // If the channel matches a whitelist then allow the join.
+ for (GoodChannels::const_iterator i = goodchannels.begin(); i != goodchannels.end(); ++i)
+ if (InspIRCd::Match(cname, *i))
return MOD_RES_PASSTHRU;
- }
- else
- {
- std::string reason = j->second->getString("reason");
- std::string redirect = j->second->getString("redirect");
-
- ConfigTagList goodchans = ServerInstance->Config->ConfTags("goodchan");
- for (ConfigIter i = goodchans.first; i != goodchans.second; ++i)
- {
- if (InspIRCd::Match(cname, i->second->getString("name")))
- {
- return MOD_RES_PASSTHRU;
- }
- }
-
- if (ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
- {
- /* simple way to avoid potential loops: don't redirect to +L channels */
- Channel *newchan = ServerInstance->FindChan(redirect);
- if ((!newchan) || (!(newchan->IsModeSet('L'))))
- {
- user->WriteNumeric(926, "%s %s :Channel %s is forbidden, redirecting to %s: %s",user->nick.c_str(),cname,cname,redirect.c_str(), reason.c_str());
- Channel::JoinUser(user,redirect.c_str(),false,"",false,ServerInstance->Time());
- return MOD_RES_DENY;
- }
- }
-
- user->WriteNumeric(926, "%s %s :Channel %s is forbidden: %s",user->nick.c_str(),cname,cname,reason.c_str());
- return MOD_RES_DENY;
- }
+
+ // If there is no redirect chan, the user has enabled the antiredirect mode, or
+ // the target channel redirects elsewhere we just tell the user and deny the join.
+ Channel* target = NULL;
+ if (badchan.redirect.empty() || user->IsModeSet(antiredirectmode)
+ || ((target = ServerInstance->FindChan(badchan.redirect)) && target->IsModeSet(redirectmode)))
+ {
+ user->WriteNumeric(ERR_BADCHANNEL, cname, InspIRCd::Format("Channel %s is forbidden: %s",
+ cname.c_str(), badchan.reason.c_str()));
+ return MOD_RES_DENY;
}
+
+ // Redirect the user to the target channel.
+ user->WriteNumeric(ERR_BADCHANNEL, cname, InspIRCd::Format("Channel %s is forbidden, redirecting to %s: %s",
+ cname.c_str(), badchan.redirect.c_str(), badchan.reason.c_str()));
+ Channel::JoinUser(user, badchan.redirect);
+ return MOD_RES_DENY;
}
return MOD_RES_PASSTHRU;
}
projects / user / henk / code / inspircd.git / blobdiff