]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/channels.cpp
Change the syntax of FOREACH macros to be less dumb.
[user/henk/code/inspircd.git] / src / channels.cpp
index 855fd0e150e0297d2658b9e5bd0f353b080e8b7f..d82ad6c233b4345d838d61b41113df96c72c503d 100644 (file)
  */
 
 
-/* $Core */
-
 #include "inspircd.h"
+#include "listmode.h"
 #include <cstdarg>
 #include "mode.h"
 
+namespace
+{
+       ChanModeReference ban(NULL, "ban");
+       ChanModeReference inviteonlymode(NULL, "inviteonly");
+       ChanModeReference keymode(NULL, "key");
+       ChanModeReference limitmode(NULL, "limit");
+       ChanModeReference secretmode(NULL, "secret");
+       ChanModeReference privatemode(NULL, "private");
+       UserModeReference invisiblemode(NULL, "invisible");
+}
+
 Channel::Channel(const std::string &cname, time_t ts)
 {
-       chan_hash::iterator findchan = ServerInstance->chanlist->find(cname);
-       if (findchan != ServerInstance->chanlist->end())
+       if (!ServerInstance->chanlist->insert(std::make_pair(cname, this)).second)
                throw CoreException("Cannot create duplicate channel " + cname);
 
-       (*(ServerInstance->chanlist))[cname.c_str()] = this;
-       this->name.assign(cname, 0, ServerInstance->Config->Limits.ChanMax);
+       this->name = cname;
        this->age = ts ? ts : ServerInstance->Time();
 
-       maxbans = topicset = 0;
+       topicset = 0;
        modes.reset();
 }
 
-void Channel::SetMode(char mode,bool mode_on)
-{
-       modes[mode-65] = mode_on;
-}
-
 void Channel::SetMode(ModeHandler* mh, bool on)
 {
        modes[mh->GetModeChar() - 65] = on;
 }
 
-void Channel::SetModeParam(char mode, const std::string& parameter)
+void Channel::SetModeParam(ModeHandler* mh, const std::string& parameter)
 {
-       CustomModeList::iterator n = custom_mode_params.find(mode);
-       // always erase, even if changing, so that the map gets the new value
-       if (n != custom_mode_params.end())
-               custom_mode_params.erase(n);
+       char mode = mh->GetModeChar();
        if (parameter.empty())
        {
+               custom_mode_params.erase(mode);
                modes[mode-65] = false;
        }
        else
@@ -70,19 +71,6 @@ void Channel::SetModeParam(char mode, const std::string& parameter)
        }
 }
 
-void Channel::SetModeParam(ModeHandler* mode, const std::string& parameter)
-{
-       SetModeParam(mode->GetModeChar(), parameter);
-}
-
-std::string Channel::GetModeParameter(char mode)
-{
-       CustomModeList::iterator n = custom_mode_params.find(mode);
-       if (n != custom_mode_params.end())
-               return n->second;
-       return "";
-}
-
 std::string Channel::GetModeParameter(ModeHandler* mode)
 {
        CustomModeList::iterator n = custom_mode_params.find(mode->GetModeChar());
@@ -91,96 +79,64 @@ std::string Channel::GetModeParameter(ModeHandler* mode)
        return "";
 }
 
-int Channel::SetTopic(User *u, std::string &ntopic, bool forceset)
+void Channel::SetTopic(User* u, const std::string& ntopic)
 {
-       if (!u)
-               u = ServerInstance->FakeClient;
-       if (IS_LOCAL(u) && !forceset)
-       {
-               ModResult res;
-               FIRST_MOD_RESULT(OnPreTopicChange, res, (u,this,ntopic));
-
-               if (res == MOD_RES_DENY)
-                       return CMD_FAILURE;
-               if (res != MOD_RES_ALLOW)
-               {
-                       if (!this->HasUser(u))
-                       {
-                               u->WriteNumeric(442, "%s %s :You're not on that channel!",u->nick.c_str(), this->name.c_str());
-                               return CMD_FAILURE;
-                       }
-                       if (IsModeSet('t') && !ServerInstance->OnCheckExemption(u,this,"topiclock").check(GetPrefixValue(u) >= HALFOP_VALUE))
-                       {
-                               u->WriteNumeric(482, "%s %s :You do not have access to change the topic on this channel", u->nick.c_str(), this->name.c_str());
-                               return CMD_FAILURE;
-                       }
-               }
-       }
-
        this->topic.assign(ntopic, 0, ServerInstance->Config->Limits.MaxTopic);
-       if (u)
-       {
-               this->setby.assign(ServerInstance->Config->FullHostInTopic ? u->GetFullHost() : u->nick, 0, 128);
-               this->WriteChannel(u, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
-       }
-       else
-       {
-               this->setby.assign(ServerInstance->Config->ServerName);
-               this->WriteChannelWithServ(ServerInstance->Config->ServerName, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
-       }
-
+       this->setby.assign(ServerInstance->Config->FullHostInTopic ? u->GetFullHost() : u->nick, 0, 128);
+       this->WriteChannel(u, "TOPIC %s :%s", this->name.c_str(), this->topic.c_str());
        this->topicset = ServerInstance->Time();
 
-       FOREACH_MOD(I_OnPostTopicChange,OnPostTopicChange(u, this, this->topic));
-
-       return CMD_SUCCESS;
-}
-
-long Channel::GetUserCounter()
-{
-       return userlist.size();
+       FOREACH_MOD(OnPostTopicChange, (u, this, this->topic));
 }
 
 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;
 }
 
 void Channel::DelUser(User* user)
 {
-       UserMembIter a = userlist.find(user);
+       UserMembIter it = userlist.find(user);
+       if (it != userlist.end())
+               DelUser(it);
+}
 
-       if (a != userlist.end())
-       {
-               a->second->cull();
-               delete a->second;
-               userlist.erase(a);
-       }
+void Channel::CheckDestroy()
+{
+       if (!userlist.empty())
+               return;
 
-       if (userlist.empty())
-       {
-               ModResult res;
-               FIRST_MOD_RESULT(OnChannelPreDelete, res, (this));
-               if (res == MOD_RES_DENY)
-                       return;
-               chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
-               /* kill the record */
-               if (iter != ServerInstance->chanlist->end())
-               {
-                       FOREACH_MOD(I_OnChannelDelete, OnChannelDelete(this));
-                       ServerInstance->chanlist->erase(iter);
-               }
+       ModResult res;
+       FIRST_MOD_RESULT(OnChannelPreDelete, res, (this));
+       if (res == MOD_RES_DENY)
+               return;
 
-               ClearInvites();
-               ServerInstance->GlobalCulls.AddItem(this);
+       chan_hash::iterator iter = ServerInstance->chanlist->find(this->name);
+       /* kill the record */
+       if (iter != ServerInstance->chanlist->end())
+       {
+               FOREACH_MOD(OnChannelDelete, (this));
+               ServerInstance->chanlist->erase(iter);
        }
+
+       ClearInvites();
+       ServerInstance->GlobalCulls.AddItem(this);
 }
 
-bool Channel::HasUser(User* user)
+void Channel::DelUser(const UserMembIter& membiter)
 {
-       return (userlist.find(user) != userlist.end());
+       Membership* memb = membiter->second;
+       memb->cull();
+       delete memb;
+       userlist.erase(membiter);
+
+       // If this channel became empty then it should be removed
+       CheckDestroy();
 }
 
 Membership* Channel::GetUser(User* user)
@@ -191,14 +147,9 @@ Membership* Channel::GetUser(User* user)
        return i->second;
 }
 
-const UserMembList* Channel::GetUsers()
-{
-       return &userlist;
-}
-
 void Channel::SetDefaultModes()
 {
-       ServerInstance->Logs->Log("CHANNELS", DEBUG, "SetDefaultModes %s",
+       ServerInstance->Logs->Log("CHANNELS", LOG_DEBUG, "SetDefaultModes %s",
                ServerInstance->Config->DefaultModes.c_str());
        irc::spacesepstream list(ServerInstance->Config->DefaultModes);
        std::string modeseq;
@@ -225,15 +176,13 @@ 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, const char* cn, bool override, const char* 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 || !cn || 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;
-
-       char cname[MAXBUF];
-       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.
@@ -241,13 +190,13 @@ Channel* Channel::JoinUser(User *user, const char* cn, bool override, const char
         * 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"))
                {
                        if (user->chans.size() >= ServerInstance->Config->OperMaxChans)
                        {
-                               user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
+                               user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cname.c_str());
                                return NULL;
                        }
                }
@@ -258,101 +207,99 @@ Channel* Channel::JoinUser(User *user, const char* cn, bool override, const char
                                maxchans = ServerInstance->Config->MaxChans;
                        if (user->chans.size() >= maxchans)
                        {
-                               user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cn);
+                               user->WriteNumeric(ERR_TOOMANYCHANNELS, "%s %s :You are on too many channels",user->nick.c_str(), cname.c_str());
                                return NULL;
                        }
                }
        }
 
-       strlcpy(cname, cn, ServerInstance->Config->Limits.ChanMax);
-       Ptr = ServerInstance->FindChan(cname);
-       bool created_by_local = false;
+       // Crop channel name if it's too long
+       if (cname.length() > ServerInstance->Config->Limits.ChanMax)
+               cname.resize(ServerInstance->Config->Limits.ChanMax);
 
-       if (!Ptr)
+       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 (!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",DEBUG,"*** BUG *** Channel::JoinUser called for REMOTE user '%s' on channel '%s' but no TS given!", user->nick.c_str(), cn);
-               }
-               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 ? key : ""));
+                       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 ? 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->name.c_str());
+                               std::string ckey = chan->GetModeParameter(keymode);
+                               bool invited = user->IsInvited(chan);
                                bool can_bypass = ServerInstance->Config->InvBypassModes && invited;
 
                                if (!ckey.empty())
                                {
-                                       FIRST_MOD_RESULT(OnCheckKey, MOD_RESULT, (user, Ptr, key ? key : ""));
-                                       if (!MOD_RESULT.check((key && ckey == key) || can_bypass))
+                                       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(inviteonlymode))
                                {
-                                       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(limitmode);
                                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;
                                }
 
@@ -362,67 +309,78 @@ Channel* Channel::JoinUser(User *user, const char* cn, bool override, const char
                                 */
                                if (invited)
                                {
-                                       IS_LOCAL(user)->RemoveInvite(Ptr->name.c_str());
+                                       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;
+       if (IS_SERVER(user))
+       {
+               ServerInstance->Logs->Log("CHANNELS", LOG_DEBUG, "Attempted to join server user " + user->uuid + " to channel " + this->name);
+               return;
+       }
+
+       Membership* memb = this->AddUser(user);
+       if (!memb)
+               return; // Already on the channel
 
-       Membership* memb = Ptr->AddUser(user);
-       user->chans.insert(Ptr);
+       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(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;
+
+       FOREACH_MOD(OnPostJoin, (memb));
 }
 
 bool Channel::IsBanned(User* user)
@@ -433,10 +391,15 @@ bool Channel::IsBanned(User* user)
        if (result != MOD_RES_PASSTHRU)
                return (result == MOD_RES_DENY);
 
-       for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
+       ListModeBase* banlm = static_cast<ListModeBase*>(*ban);
+       const ListModeBase::ModeList* bans = banlm->GetList(this);
+       if (bans)
        {
-               if (CheckBan(user, i->data))
-                       return true;
+               for (ListModeBase::ModeList::const_iterator it = bans->begin(); it != bans->end(); it++)
+               {
+                       if (CheckBan(user, it->mask))
+                               return true;
+               }
        }
        return false;
 }
@@ -449,17 +412,16 @@ bool Channel::CheckBan(User* user, const std::string& mask)
                return (result == MOD_RES_DENY);
 
        // extbans were handled above, if this is one it obviously didn't match
-       if (mask[1] == ':')
+       if ((mask.length() <= 2) || (mask[1] == ':'))
                return false;
 
        std::string::size_type at = mask.find('@');
        if (at == std::string::npos)
                return false;
 
-       char tomatch[MAXBUF];
-       snprintf(tomatch, MAXBUF, "%s!%s", user->nick.c_str(), user->ident.c_str());
+       const std::string nickIdent = user->nick + "!" + user->ident;
        std::string prefix = mask.substr(0, at);
-       if (InspIRCd::Match(tomatch, prefix, NULL))
+       if (InspIRCd::Match(nickIdent, prefix, NULL))
        {
                std::string suffix = mask.substr(at + 1);
                if (InspIRCd::Match(user->host, suffix, NULL) ||
@@ -476,12 +438,15 @@ ModResult Channel::GetExtBanStatus(User *user, char type)
        FIRST_MOD_RESULT(OnExtBanCheck, rv, (user, this, type));
        if (rv != MOD_RES_PASSTHRU)
                return rv;
-       for (BanList::iterator i = this->bans.begin(); i != this->bans.end(); i++)
+
+       ListModeBase* banlm = static_cast<ListModeBase*>(*ban);
+       const ListModeBase::ModeList* bans = banlm->GetList(this);
+       if (bans)
+
        {
-               if (i->data[0] == type && i->data[1] == ':')
+               for (ListModeBase::ModeList::const_iterator it = bans->begin(); it != bans->end(); ++it)
                {
-                       std::string val = i->data.substr(2);
-                       if (CheckBan(user, val))
+                       if (CheckBan(user, it->mask))
                                return MOD_RES_DENY;
                }
        }
@@ -489,61 +454,54 @@ ModResult Channel::GetExtBanStatus(User *user, char type)
 }
 
 /* Channel::PartUser
- * remove a channel from a users record, and return the number of users left.
- * Therefore, if this function returns 0 the caller should delete the Channel.
+ * Remove a channel from a users record, remove the reference to the Membership object
+ * from the channel and destroy it.
  */
 void Channel::PartUser(User *user, std::string &reason)
 {
-       if (!user)
-               return;
-
-       Membership* memb = GetUser(user);
+       UserMembIter membiter = userlist.find(user);
 
-       if (memb)
+       if (membiter != userlist.end())
        {
+               Membership* memb = membiter->second;
                CUList except_list;
-               FOREACH_MOD(I_OnUserPart,OnUserPart(memb, reason, except_list));
+               FOREACH_MOD(OnUserPart, (memb, reason, except_list));
 
                WriteAllExcept(user, false, 0, except_list, "PART %s%s%s", this->name.c_str(), reason.empty() ? "" : " :", reason.c_str());
 
+               // Remove this channel from the user's chanlist
                user->chans.erase(this);
-               this->RemoveAllPrefixes(user);
+               // Remove the Membership from this channel's userlist and destroy it
+               this->DelUser(membiter);
        }
-
-       this->DelUser(user);
 }
 
-void Channel::KickUser(User *src, User *user, const char* reason)
+void Channel::KickUser(User* src, User* victim, const std::string& reason, Membership* srcmemb)
 {
-       if (!src || !user || !reason)
+       UserMembIter victimiter = userlist.find(victim);
+       Membership* memb = ((victimiter != userlist.end()) ? victimiter->second : NULL);
+
+       if (!memb)
+       {
+               src->WriteNumeric(ERR_USERNOTINCHANNEL, "%s %s %s :They are not on that channel",src->nick.c_str(), victim->nick.c_str(), this->name.c_str());
                return;
+       }
 
-       Membership* memb = GetUser(user);
+       // Do the following checks only if the KICK is done by a local user;
+       // each server enforces its own rules.
        if (IS_LOCAL(src))
        {
-               if (!memb)
-               {
-                       src->WriteNumeric(ERR_USERNOTINCHANNEL, "%s %s %s :They are not on that channel",src->nick.c_str(), user->nick.c_str(), this->name.c_str());
-                       return;
-               }
-               if ((ServerInstance->ULine(user->server)) && (!ServerInstance->ULine(src->server)))
-               {
-                       src->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :Only a u-line may kick a u-line from a channel.",src->nick.c_str(), this->name.c_str());
-                       return;
-               }
-
+               // Modules are allowed to explicitly allow or deny kicks done by local users
                ModResult res;
-               if (ServerInstance->ULine(src->server))
-                       res = MOD_RES_ALLOW;
-               else
-                       FIRST_MOD_RESULT(OnUserPreKick, res, (src,memb,reason));
-
+               FIRST_MOD_RESULT(OnUserPreKick, res, (src,memb,reason));
                if (res == MOD_RES_DENY)
                        return;
 
                if (res == MOD_RES_PASSTHRU)
                {
-                       unsigned int them = this->GetPrefixValue(src);
+                       if (!srcmemb)
+                               srcmemb = GetUser(src);
+                       unsigned int them = srcmemb ? srcmemb->getRank() : 0;
                        unsigned int req = HALFOP_VALUE;
                        for (std::string::size_type i = 0; i < memb->modes.length(); i++)
                        {
@@ -561,78 +519,48 @@ void Channel::KickUser(User *src, User *user, const char* reason)
                }
        }
 
-       if (memb)
-       {
-               CUList except_list;
-               FOREACH_MOD(I_OnUserKick,OnUserKick(src, memb, reason, except_list));
-
-               WriteAllExcept(src, false, 0, except_list, "KICK %s %s :%s", name.c_str(), user->nick.c_str(), reason);
+       CUList except_list;
+       FOREACH_MOD(OnUserKick, (src, memb, reason, except_list));
 
-               user->chans.erase(this);
-               this->RemoveAllPrefixes(user);
-       }
+       WriteAllExcept(src, false, 0, except_list, "KICK %s %s :%s", name.c_str(), victim->nick.c_str(), reason.c_str());
 
-       this->DelUser(user);
+       victim->chans.erase(this);
+       this->DelUser(victimiter);
 }
 
 void Channel::WriteChannel(User* user, const char* text, ...)
 {
-       char textbuffer[MAXBUF];
-       va_list argsPtr;
-
-       if (!user || !text)
-               return;
-
-       va_start(argsPtr, text);
-       vsnprintf(textbuffer, MAXBUF, text, argsPtr);
-       va_end(argsPtr);
-
-       this->WriteChannel(user, std::string(textbuffer));
+       std::string textbuffer;
+       VAFORMAT(textbuffer, text, text);
+       this->WriteChannel(user, textbuffer);
 }
 
 void Channel::WriteChannel(User* user, const std::string &text)
 {
-       char tb[MAXBUF];
-
-       if (!user)
-               return;
-
-       snprintf(tb,MAXBUF,":%s %s", user->GetFullHost().c_str(), text.c_str());
-       std::string out = tb;
+       const std::string message = ":" + user->GetFullHost() + " " + text;
 
        for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
        {
                if (IS_LOCAL(i->first))
-                       i->first->Write(out);
+                       i->first->Write(message);
        }
 }
 
 void Channel::WriteChannelWithServ(const std::string& ServName, const char* text, ...)
 {
-       char textbuffer[MAXBUF];
-       va_list argsPtr;
-
-       if (!text)
-               return;
-
-       va_start(argsPtr, text);
-       vsnprintf(textbuffer, MAXBUF, text, argsPtr);
-       va_end(argsPtr);
-
-       this->WriteChannelWithServ(ServName, std::string(textbuffer));
+       std::string textbuffer;
+       VAFORMAT(textbuffer, text, text);
+       this->WriteChannelWithServ(ServName, textbuffer);
 }
 
 void Channel::WriteChannelWithServ(const std::string& ServName, const std::string &text)
 {
-       char tb[MAXBUF];
-
-       snprintf(tb,MAXBUF,":%s %s", ServName.empty() ? ServerInstance->Config->ServerName.c_str() : ServName.c_str(), text.c_str());
-       std::string out = tb;
+       const std::string message = ":" + (ServName.empty() ? ServerInstance->Config->ServerName : ServName) + " " + text;
 
        for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
        {
                if (IS_LOCAL(i->first))
-                       i->first->Write(out);
+                       i->first->Write(message);
        }
 }
 
@@ -640,44 +568,23 @@ void Channel::WriteChannelWithServ(const std::string& ServName, const std::strin
  * for the sender (for privmsg etc) */
 void Channel::WriteAllExceptSender(User* user, bool serversource, char status, const char* text, ...)
 {
-       char textbuffer[MAXBUF];
-       va_list argsPtr;
-
-       if (!text)
-               return;
-
-       va_start(argsPtr, text);
-       vsnprintf(textbuffer, MAXBUF, text, argsPtr);
-       va_end(argsPtr);
-
-       this->WriteAllExceptSender(user, serversource, status, std::string(textbuffer));
+       std::string textbuffer;
+       VAFORMAT(textbuffer, text, text);
+       this->WriteAllExceptSender(user, serversource, status, textbuffer);
 }
 
 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const char* text, ...)
 {
-       char textbuffer[MAXBUF];
-       va_list argsPtr;
-
-       if (!text)
-               return;
-
-       int offset = snprintf(textbuffer,MAXBUF,":%s ", serversource ? ServerInstance->Config->ServerName.c_str() : user->GetFullHost().c_str());
-
-       va_start(argsPtr, text);
-       vsnprintf(textbuffer + offset, MAXBUF - offset, text, argsPtr);
-       va_end(argsPtr);
-
-       this->RawWriteAllExcept(user, serversource, status, except_list, std::string(textbuffer));
+       std::string textbuffer;
+       VAFORMAT(textbuffer, text, text);
+       textbuffer = ":" + (serversource ? ServerInstance->Config->ServerName : user->GetFullHost()) + " " + textbuffer;
+       this->RawWriteAllExcept(user, serversource, status, except_list, textbuffer);
 }
 
 void Channel::WriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &text)
 {
-       char tb[MAXBUF];
-
-       snprintf(tb,MAXBUF,":%s %s", serversource ? ServerInstance->Config->ServerName.c_str() : user->GetFullHost().c_str(), text.c_str());
-       std::string out = tb;
-
-       this->RawWriteAllExcept(user, serversource, status, except_list, std::string(tb));
+       const std::string message = ":" + (serversource ? ServerInstance->Config->ServerName : user->GetFullHost()) + " " + text;
+       this->RawWriteAllExcept(user, serversource, status, except_list, message);
 }
 
 void Channel::RawWriteAllExcept(User* user, bool serversource, char status, CUList &except_list, const std::string &out)
@@ -709,59 +616,41 @@ void Channel::WriteAllExceptSender(User* user, bool serversource, char status, c
        this->WriteAllExcept(user, serversource, status, except_list, std::string(text));
 }
 
-/*
- * return a count of the users on a specific channel accounting for
- * invisible users who won't increase the count. e.g. for /LIST
- */
-int Channel::CountInvisible()
-{
-       int count = 0;
-       for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
-       {
-               if (!(i->first->IsModeSet('i')))
-                       count++;
-       }
-
-       return count;
-}
-
-char* Channel::ChanModes(bool showkey)
+const char* Channel::ChanModes(bool showkey)
 {
-       static char scratch[MAXBUF];
-       static char sparam[MAXBUF];
-       char* offset = scratch;
-       std::string extparam;
+       static std::string scratch;
+       std::string sparam;
 
-       *scratch = '\0';
-       *sparam = '\0';
+       scratch.clear();
 
        /* This was still iterating up to 190, Channel::modes is only 64 elements -- Om */
        for(int n = 0; n < 64; n++)
        {
                if(this->modes[n])
                {
-                       *offset++ = n + 65;
-                       extparam.clear();
+                       scratch.push_back(n + 65);
+                       ModeHandler* mh = ServerInstance->Modes->FindMode(n+'A', MODETYPE_CHANNEL);
+                       if (!mh)
+                               continue;
+
                        if (n == 'k' - 65 && !showkey)
                        {
-                               extparam = "<key>";
+                               sparam += " <key>";
                        }
                        else
                        {
-                               extparam = this->GetModeParameter(n + 65);
-                       }
-                       if (!extparam.empty())
-                       {
-                               charlcat(sparam,' ',MAXBUF);
-                               strlcat(sparam,extparam.c_str(),MAXBUF);
+                               const std::string param = this->GetModeParameter(mh);
+                               if (!param.empty())
+                               {
+                                       sparam += ' ';
+                                       sparam += param;
+                               }
                        }
                }
        }
 
-       /* Null terminate scratch */
-       *offset = '\0';
-       strlcat(scratch,sparam,MAXBUF);
-       return scratch;
+       scratch += sparam;
+       return scratch.c_str();
 }
 
 /* compile a userlist of a channel into a string, each nick seperated by
@@ -769,31 +658,33 @@ char* Channel::ChanModes(bool showkey)
  */
 void Channel::UserList(User *user)
 {
-       char list[MAXBUF];
-       size_t dlen, curlen;
-
-       if (!IS_LOCAL(user))
-               return;
-
-       if (this->IsModeSet('s') && !this->HasUser(user) && !user->HasPrivPermission("channels/auspex"))
+       if (this->IsModeSet(secretmode) && !this->HasUser(user) && !user->HasPrivPermission("channels/auspex"))
        {
                user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), this->name.c_str());
                return;
        }
 
-       dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=',  this->name.c_str());
+       std::string list = user->nick;
+       list.push_back(' ');
+       list.push_back(this->IsModeSet(secretmode) ? '@' : this->IsModeSet(privatemode) ? '*' : '=');
+       list.push_back(' ');
+       list.append(this->name).append(" :");
+       std::string::size_type pos = list.size();
 
-       int numusers = 0;
-       char* ptr = list + dlen;
+       bool has_one = false;
 
        /* Improvement by Brain - this doesnt change in value, so why was it inside
         * the loop?
         */
        bool has_user = this->HasUser(user);
 
-       for (UserMembIter i = userlist.begin(); i != userlist.end(); i++)
+       std::string prefixlist;
+       std::string nick;
+       for (UserMembIter i = userlist.begin(); i != userlist.end(); ++i)
        {
-               if ((!has_user) && (i->first->IsModeSet('i')))
+               if (i->first->quitting)
+                       continue;
+               if ((!has_user) && (i->first->IsModeSet(invisiblemode)))
                {
                        /*
                         * user is +i, and source not on the channel, does not show
@@ -802,72 +693,39 @@ void Channel::UserList(User *user)
                        continue;
                }
 
-               std::string prefixlist = this->GetPrefixChar(i->first);
-               std::string nick = i->first->nick;
+               prefixlist = this->GetPrefixChar(i->first);
+               nick = i->first->nick;
 
-               FOREACH_MOD(I_OnNamesListItem, OnNamesListItem(user, i->second, prefixlist, nick));
+               FOREACH_MOD(OnNamesListItem, (user, i->second, prefixlist, nick));
 
                /* Nick was nuked, a module wants us to skip it */
                if (nick.empty())
                        continue;
 
-               size_t ptrlen = 0;
-
-               if (curlen + prefixlist.length() + nick.length() + 1 > 480)
+               if (list.size() + prefixlist.length() + nick.length() + 1 > 480)
                {
                        /* list overflowed into multiple numerics */
-                       user->WriteNumeric(RPL_NAMREPLY, std::string(list));
-
-                       /* reset our lengths */
-                       dlen = curlen = snprintf(list,MAXBUF,"%s %c %s :", user->nick.c_str(), this->IsModeSet('s') ? '@' : this->IsModeSet('p') ? '*' : '=', this->name.c_str());
-                       ptr = list + dlen;
+                       user->WriteNumeric(RPL_NAMREPLY, list);
 
-                       numusers = 0;
+                       // Erase all nicks, keep the constant part
+                       list.erase(pos);
+                       has_one = false;
                }
 
-               ptrlen = snprintf(ptr, MAXBUF, "%s%s ", prefixlist.c_str(), nick.c_str());
-
-               curlen += ptrlen;
-               ptr += ptrlen;
+               list.append(prefixlist).append(nick).push_back(' ');
 
-               numusers++;
+               has_one = true;
        }
 
        /* if whats left in the list isnt empty, send it */
-       if (numusers)
+       if (has_one)
        {
-               user->WriteNumeric(RPL_NAMREPLY, std::string(list));
+               user->WriteNumeric(RPL_NAMREPLY, list);
        }
 
        user->WriteNumeric(RPL_ENDOFNAMES, "%s %s :End of /NAMES list.", user->nick.c_str(), this->name.c_str());
 }
 
-long Channel::GetMaxBans()
-{
-       /* Return the cached value if there is one */
-       if (this->maxbans)
-               return this->maxbans;
-
-       /* If there isnt one, we have to do some O(n) hax to find it the first time. (ick) */
-       for (std::map<std::string,int>::iterator n = ServerInstance->Config->maxbans.begin(); n != ServerInstance->Config->maxbans.end(); n++)
-       {
-               if (InspIRCd::Match(this->name, n->first, NULL))
-               {
-                       this->maxbans = n->second;
-                       return n->second;
-               }
-       }
-
-       /* Screw it, just return the default of 64 */
-       this->maxbans = 64;
-       return this->maxbans;
-}
-
-void Channel::ResetMaxBans()
-{
-       this->maxbans = 0;
-}
-
 /* returns the status character for a given user on a channel, e.g. @ for op,
  * % for halfop etc. If the user has several modes set, the highest mode
  * the user has must be returned.
@@ -963,22 +821,13 @@ bool Channel::SetPrefix(User* user, char prefix, bool adding)
        return adding;
 }
 
-void Channel::RemoveAllPrefixes(User* user)
-{
-       UserMembIter m = userlist.find(user);
-       if (m != userlist.end())
-       {
-               m->second->modes.clear();
-       }
-}
-
 void Invitation::Create(Channel* c, LocalUser* u, time_t timeout)
 {
        if ((timeout != 0) && (ServerInstance->Time() >= timeout))
                // Expired, don't bother
                return;
 
-       ServerInstance->Logs->Log("INVITATION", DEBUG, "Invitation::Create chan=%s user=%s", c->name.c_str(), u->uuid.c_str());
+       ServerInstance->Logs->Log("INVITATION", LOG_DEBUG, "Invitation::Create chan=%s user=%s", c->name.c_str(), u->uuid.c_str());
 
        Invitation* inv = Invitation::Find(c, u, false);
        if (inv)
@@ -986,20 +835,20 @@ void Invitation::Create(Channel* c, LocalUser* u, time_t timeout)
                 if ((inv->expiry == 0) || (inv->expiry > timeout))
                        return;
                inv->expiry = timeout;
-               ServerInstance->Logs->Log("INVITATION", DEBUG, "Invitation::Create changed expiry in existing invitation %p", (void*) inv);
+               ServerInstance->Logs->Log("INVITATION", LOG_DEBUG, "Invitation::Create changed expiry in existing invitation %p", (void*) inv);
        }
        else
        {
                inv = new Invitation(c, u, timeout);
                c->invites.push_back(inv);
                u->invites.push_back(inv);
-               ServerInstance->Logs->Log("INVITATION", DEBUG, "Invitation::Create created new invitation %p", (void*) inv);
+               ServerInstance->Logs->Log("INVITATION", LOG_DEBUG, "Invitation::Create created new invitation %p", (void*) inv);
        }
 }
 
 Invitation* Invitation::Find(Channel* c, LocalUser* u, bool check_expired)
 {
-       ServerInstance->Logs->Log("INVITATION", DEBUG, "Invitation::Find chan=%s user=%s check_expired=%d", c ? c->name.c_str() : "NULL", u ? u->uuid.c_str() : "NULL", check_expired);
+       ServerInstance->Logs->Log("INVITATION", LOG_DEBUG, "Invitation::Find chan=%s user=%s check_expired=%d", c ? c->name.c_str() : "NULL", u ? u->uuid.c_str() : "NULL", check_expired);
        if (!u || u->invites.empty())
                return NULL;
 
@@ -1014,7 +863,7 @@ Invitation* Invitation::Find(Channel* c, LocalUser* u, bool check_expired)
                {
                        /* Expired invite, remove it. */
                        std::string expiration = ServerInstance->TimeString(inv->expiry);
-                       ServerInstance->Logs->Log("INVITATION", DEBUG, "Invitation::Find ecountered expired entry: %p expired %s", (void*) inv, expiration.c_str());
+                       ServerInstance->Logs->Log("INVITATION", LOG_DEBUG, "Invitation::Find ecountered expired entry: %p expired %s", (void*) inv, expiration.c_str());
                        i = locallist.erase(i);
                        inv->cull();
                        delete inv;
@@ -1032,7 +881,7 @@ Invitation* Invitation::Find(Channel* c, LocalUser* u, bool check_expired)
        }
 
        locallist.swap(u->invites);
-       ServerInstance->Logs->Log("INVITATION", DEBUG, "Invitation::Find result=%p", (void*) result);
+       ServerInstance->Logs->Log("INVITATION", LOG_DEBUG, "Invitation::Find result=%p", (void*) result);
        return result;
 }
 
@@ -1049,7 +898,7 @@ Invitation::~Invitation()
 
 void InviteBase::ClearInvites()
 {
-       ServerInstance->Logs->Log("INVITEBASE", DEBUG, "InviteBase::ClearInvites %p", (void*) this);
+       ServerInstance->Logs->Log("INVITEBASE", LOG_DEBUG, "InviteBase::ClearInvites %p", (void*) this);
        InviteList locallist;
        locallist.swap(invites);
        for (InviteList::const_iterator i = locallist.begin(); i != locallist.end(); ++i)