]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/channels.cpp
Merge pull request #508 from ShutterQuick/inspircd+samodepatch
[user/henk/code/inspircd.git] / src / channels.cpp
index b8406a65a77f69adb0bae09e7d1aa9f461988967..edb4d056a0cbc3d9aeb9a132f5020163af20a242 100644 (file)
@@ -146,8 +146,11 @@ long Channel::GetUserCounter()
 
 Membership* Channel::AddUser(User* user)
 {
-       Membership* memb = new Membership(user, this);
-       userlist[user] = memb;
+       Membership*& memb = userlist[user];
+       if (memb)
+               return NULL;
+
+       memb = new Membership(user, this);
        return memb;
 }
 
@@ -228,14 +231,13 @@ void Channel::SetDefaultModes()
  * add a channel to a user, creating the record for it if needed and linking
  * it to the user record
  */
-Channel* Channel::JoinUser(User* user, std::string cname, bool override, const std::string& key, bool bursting, time_t TS)
+Channel* Channel::JoinUser(LocalUser* user, std::string cname, bool override, const std::string& key)
 {
-       // Fix: unregistered users could be joined using /SAJOIN
-       if (!user || user->registered != REG_ALL)
+       if (user->registered != REG_ALL)
+       {
+               ServerInstance->Logs->Log("CHANNELS", LOG_DEBUG, "Attempted to join unregistered user " + user->uuid + " to channel " + cname);
                return NULL;
-
-       std::string privs;
-       Channel *Ptr;
+       }
 
        /*
         * We don't restrict the number of channels that remote users or users that are override-joining may be in.
@@ -243,7 +245,7 @@ Channel* Channel::JoinUser(User* user, std::string cname, bool override, const s
         * We restrict local operators to OperMaxChans channels.
         * This is a lot more logical than how it was formerly. -- w00t
         */
-       if (IS_LOCAL(user) && !override)
+       if (!override)
        {
                if (user->HasPrivPermission("channels/high-join-limit"))
                {
@@ -266,97 +268,93 @@ Channel* Channel::JoinUser(User* user, std::string cname, bool override, const s
                }
        }
 
+       // Crop channel name if it's too long
        if (cname.length() > ServerInstance->Config->Limits.ChanMax)
                cname.resize(ServerInstance->Config->Limits.ChanMax);
 
-       Ptr = ServerInstance->FindChan(cname);
-       bool created_by_local = false;
+       Channel* chan = ServerInstance->FindChan(cname);
+       bool created_by_local = (chan == NULL); // Flag that will be passed to modules in the OnUserJoin() hook later
+       std::string privs; // Prefix mode(letter)s to give to the joining user
 
-       if (!Ptr)
+       if (!chan)
        {
-               /*
-                * Fix: desync bug was here, don't set @ on remote users - spanningtree handles their permissions. bug #358. -- w00t
-                */
-               if (!IS_LOCAL(user))
-               {
-                       if (!TS)
-                               ServerInstance->Logs->Log("CHANNELS",LOG_DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick.c_str(), cname.c_str());
-               }
-               else
-               {
-                       privs = "o";
-                       created_by_local = true;
-               }
+               privs = "o";
 
-               if (IS_LOCAL(user) && override == false)
+               if (override == false)
                {
+                       // Ask the modules whether they're ok with the join, pass NULL as Channel* as the channel is yet to be created
                        ModResult MOD_RESULT;
                        FIRST_MOD_RESULT(OnUserPreJoin, MOD_RESULT, (user, NULL, cname, privs, key));
                        if (MOD_RESULT == MOD_RES_DENY)
-                               return NULL;
+                               return NULL; // A module wasn't happy with the join, abort
                }
 
-               Ptr = new Channel(cname, TS);
+               chan = new Channel(cname, ServerInstance->Time());
+               // Set the default modes on the channel (<options:defaultmodes>)
+               chan->SetDefaultModes();
        }
        else
        {
                /* Already on the channel */
-               if (Ptr->HasUser(user))
+               if (chan->HasUser(user))
                        return NULL;
 
-               /*
-                * remote users are allowed us to bypass channel modes
-                * and bans (used by servers)
-                */
-               if (IS_LOCAL(user) && override == false)
+               if (override == false)
                {
                        ModResult MOD_RESULT;
-                       FIRST_MOD_RESULT(OnUserPreJoin, MOD_RESULT, (user, Ptr, cname, privs, key));
+                       FIRST_MOD_RESULT(OnUserPreJoin, MOD_RESULT, (user, chan, cname, privs, key));
+
+                       // A module explicitly denied the join and (hopefully) generated a message
+                       // describing the situation, so we may stop here without sending anything
                        if (MOD_RESULT == MOD_RES_DENY)
-                       {
                                return NULL;
-                       }
-                       else if (MOD_RESULT == MOD_RES_PASSTHRU)
+
+                       // If no module returned MOD_RES_DENY or MOD_RES_ALLOW (which is the case
+                       // most of the time) then proceed to check channel modes +k, +i, +l and bans,
+                       // in this order.
+                       // If a module explicitly allowed the join (by returning MOD_RES_ALLOW),
+                       // then this entire section is skipped
+                       if (MOD_RESULT == MOD_RES_PASSTHRU)
                        {
-                               std::string ckey = Ptr->GetModeParameter('k');
-                               bool invited = IS_LOCAL(user)->IsInvited(Ptr);
+                               std::string ckey = chan->GetModeParameter('k');
+                               bool invited = user->IsInvited(chan);
                                bool can_bypass = ServerInstance->Config->InvBypassModes && invited;
 
                                if (!ckey.empty())
                                {
-                                       FIRST_MOD_RESULT(OnCheckKey, MOD_RESULT, (user, Ptr, key));
+                                       FIRST_MOD_RESULT(OnCheckKey, MOD_RESULT, (user, chan, key));
                                        if (!MOD_RESULT.check((ckey == key) || can_bypass))
                                        {
                                                // If no key provided, or key is not the right one, and can't bypass +k (not invited or option not enabled)
-                                               user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), Ptr->name.c_str());
+                                               user->WriteNumeric(ERR_BADCHANNELKEY, "%s %s :Cannot join channel (Incorrect channel key)",user->nick.c_str(), chan->name.c_str());
                                                return NULL;
                                        }
                                }
 
-                               if (Ptr->IsModeSet('i'))
+                               if (chan->IsModeSet('i'))
                                {
-                                       FIRST_MOD_RESULT(OnCheckInvite, MOD_RESULT, (user, Ptr));
+                                       FIRST_MOD_RESULT(OnCheckInvite, MOD_RESULT, (user, chan));
                                        if (!MOD_RESULT.check(invited))
                                        {
-                                               user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), Ptr->name.c_str());
+                                               user->WriteNumeric(ERR_INVITEONLYCHAN, "%s %s :Cannot join channel (Invite only)",user->nick.c_str(), chan->name.c_str());
                                                return NULL;
                                        }
                                }
 
-                               std::string limit = Ptr->GetModeParameter('l');
+                               std::string limit = chan->GetModeParameter('l');
                                if (!limit.empty())
                                {
-                                       FIRST_MOD_RESULT(OnCheckLimit, MOD_RESULT, (user, Ptr));
-                                       if (!MOD_RESULT.check((Ptr->GetUserCounter() < atol(limit.c_str()) || can_bypass)))
+                                       FIRST_MOD_RESULT(OnCheckLimit, MOD_RESULT, (user, chan));
+                                       if (!MOD_RESULT.check((chan->GetUserCounter() < atol(limit.c_str()) || can_bypass)))
                                        {
-                                               user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), Ptr->name.c_str());
+                                               user->WriteNumeric(ERR_CHANNELISFULL, "%s %s :Cannot join channel (Channel is full)",user->nick.c_str(), chan->name.c_str());
                                                return NULL;
                                        }
                                }
 
-                               if (Ptr->IsBanned(user) && !can_bypass)
+                               if (chan->IsBanned(user) && !can_bypass)
                                {
-                                       user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), Ptr->name.c_str());
+                                       user->WriteNumeric(ERR_BANNEDFROMCHAN, "%s %s :Cannot join channel (You're banned)",user->nick.c_str(), chan->name.c_str());
                                        return NULL;
                                }
 
@@ -366,67 +364,78 @@ Channel* Channel::JoinUser(User* user, std::string cname, bool override, const s
                                 */
                                if (invited)
                                {
-                                       IS_LOCAL(user)->RemoveInvite(Ptr);
+                                       user->RemoveInvite(chan);
                                }
                        }
                }
        }
 
-       if (created_by_local)
-       {
-               /* As spotted by jilles, dont bother to set this on remote users */
-               Ptr->SetDefaultModes();
-       }
-
-       return Channel::ForceChan(Ptr, user, privs, bursting, created_by_local);
+       // We figured that this join is allowed and also created the
+       // channel if it didn't exist before, now do the actual join
+       chan->ForceJoin(user, &privs, false, created_by_local);
+       return chan;
 }
 
-Channel* Channel::ForceChan(Channel* Ptr, User* user, const std::string &privs, bool bursting, bool created)
+void Channel::ForceJoin(User* user, const std::string* privs, bool bursting, bool created_by_local)
 {
-       std::string nick = user->nick;
+       Membership* memb = this->AddUser(user);
+       if (!memb)
+               return; // Already on the channel
 
-       Membership* memb = Ptr->AddUser(user);
-       user->chans.insert(Ptr);
+       if (IS_SERVER(user))
+       {
+               ServerInstance->Logs->Log("CHANNELS", LOG_DEBUG, "Attempted to join server user " + user->uuid + " to channel " + this->name);
+               return;
+       }
+
+       user->chans.insert(this);
 
-       for (std::string::const_iterator x = privs.begin(); x != privs.end(); x++)
+       if (privs)
        {
-               const char status = *x;
-               ModeHandler* mh = ServerInstance->Modes->FindMode(status, MODETYPE_CHANNEL);
-               if (mh)
+               // If the user was granted prefix modes (in the OnUserPreJoin hook, or he's a
+               // remote user and his own server set the modes), then set them internally now
+               memb->modes = *privs;
+               for (std::string::const_iterator i = privs->begin(); i != privs->end(); ++i)
                {
-                       /* Set, and make sure that the mode handler knows this mode was now set */
-                       Ptr->SetPrefix(user, mh->GetModeChar(), true);
-                       mh->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, Ptr, nick, true);
+                       ModeHandler* mh = ServerInstance->Modes->FindMode(*i, MODETYPE_CHANNEL);
+                       if (mh)
+                       {
+                               std::string nick = user->nick;
+                               /* Set, and make sure that the mode handler knows this mode was now set */
+                               this->SetPrefix(user, mh->GetModeChar(), true);
+                               mh->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, nick, true);
+                       }
                }
        }
 
+       // Tell modules about this join, they have the chance now to populate except_list with users we won't send the JOIN (and possibly MODE) to
        CUList except_list;
-       FOREACH_MOD(I_OnUserJoin,OnUserJoin(memb, bursting, created, except_list));
+       FOREACH_MOD(I_OnUserJoin,OnUserJoin(memb, bursting, created_by_local, except_list));
 
-       Ptr->WriteAllExcept(user, false, 0, except_list, "JOIN :%s", Ptr->name.c_str());
+       this->WriteAllExcept(user, false, 0, except_list, "JOIN :%s", this->name.c_str());
 
        /* Theyre not the first ones in here, make sure everyone else sees the modes we gave the user */
-       if ((Ptr->GetUserCounter() > 1) && (!memb->modes.empty()))
+       if ((GetUserCounter() > 1) && (!memb->modes.empty()))
        {
                std::string ms = memb->modes;
                for(unsigned int i=0; i < memb->modes.length(); i++)
                        ms.append(" ").append(user->nick);
 
                except_list.insert(user);
-               Ptr->WriteAllExcept(user, !ServerInstance->Config->CycleHostsFromUser, 0, except_list, "MODE %s +%s", Ptr->name.c_str(), ms.c_str());
+               this->WriteAllExcept(user, !ServerInstance->Config->CycleHostsFromUser, 0, except_list, "MODE %s +%s", this->name.c_str(), ms.c_str());
        }
 
        if (IS_LOCAL(user))
        {
-               if (Ptr->topicset)
+               if (this->topicset)
                {
-                       user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), Ptr->name.c_str(), Ptr->topic.c_str());
-                       user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), Ptr->name.c_str(), Ptr->setby.c_str(), (unsigned long)Ptr->topicset);
+                       user->WriteNumeric(RPL_TOPIC, "%s %s :%s", user->nick.c_str(), this->name.c_str(), this->topic.c_str());
+                       user->WriteNumeric(RPL_TOPICTIME, "%s %s %s %lu", user->nick.c_str(), this->name.c_str(), this->setby.c_str(), (unsigned long)this->topicset);
                }
-               Ptr->UserList(user);
+               this->UserList(user);
        }
+
        FOREACH_MOD(I_OnPostJoin,OnPostJoin(memb));
-       return Ptr;
 }
 
 bool Channel::IsBanned(User* user)