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-rw-r--r--src/modules/m_denychans.cpp49
1 files changed, 46 insertions, 3 deletions
diff --git a/src/modules/m_denychans.cpp b/src/modules/m_denychans.cpp
index 969aa8b5b..3a5ea7462 100644
--- a/src/modules/m_denychans.cpp
+++ b/src/modules/m_denychans.cpp
@@ -36,6 +36,44 @@ class ModuleDenyChannels : public Module
{
delete Conf;
Conf = new ConfigReader(ServerInstance);
+ /* check for redirect validity and loops/chains */
+ for (int i =0; i < Conf->Enumerate("badchan"); i++)
+ {
+ std::string name = Conf->ReadValue("badchan","name",i);
+ std::string redirect = Conf->ReadValue("badchan","redirect",i);
+
+ if (!redirect.empty())
+ {
+
+ if (!ServerInstance->IsChannel(redirect.c_str()))
+ {
+ if (user)
+ user->WriteServ("Notice %s :Invalid badchan redirect '%s'", user->nick, redirect.c_str());
+ throw ModuleException("Invalid badchan redirect, not a channel");
+ }
+
+ for (int j =0; j < Conf->Enumerate("badchan"); j++)
+ {
+ if (match(redirect.c_str(), Conf->ReadValue("badchan","name",j).c_str()))
+ {
+ bool goodchan = false;
+ for (int k =0; k < Conf->Enumerate("goodchan"); k++)
+ {
+ if (match(redirect.c_str(), Conf->ReadValue("goodchan","name",k).c_str()))
+ goodchan = true;
+ }
+
+ if (!goodchan)
+ {
+ /* <badchan:redirect> is a badchan */
+ if (user)
+ user->WriteServ("NOTICE %s :Badchan %s redirects to badchan %s", user->nick, name.c_str(), redirect.c_str());
+ throw ModuleException("Badchan redirect loop");
+ }
+ }
+ }
+ }
+ }
}
virtual ~ModuleDenyChannels()
@@ -74,9 +112,14 @@ class ModuleDenyChannels : public Module
if (ServerInstance->IsChannel(redirect.c_str()))
{
- user->WriteServ("926 %s %s :Channel %s is forbidden, redirecting to %s: %s",user->nick,cname,cname,redirect.c_str(), reason.c_str());
- Channel::JoinUser(ServerInstance,user,redirect.c_str(),false,"",false,ServerInstance->Time(true));
- return 1;
+ /* simple way to avoid potential loops: don't redirect to +L channels */
+ Channel *newchan = ServerInstance->FindChan(redirect);
+ if ((!newchan) || (!(newchan->IsModeSet('L'))))
+ {
+ user->WriteServ("926 %s %s :Channel %s is forbidden, redirecting to %s: %s",user->nick,cname,cname,redirect.c_str(), reason.c_str());
+ Channel::JoinUser(ServerInstance,user,redirect.c_str(),false,"",false,ServerInstance->Time(true));
+ return 1;
+ }
}
user->WriteServ("926 %s %s :Channel %s is forbidden: %s",user->nick,cname,cname,reason.c_str());