]> git.netwichtig.de Git - user/henk/code/inspircd.git/blobdiff - src/users.cpp
Add support for blocking tag messages with the deaf mode.
[user/henk/code/inspircd.git] / src / users.cpp
index 7fba57faa8b59b5825ea6dc40398c4633f1dedd3..7029accc052a6c38ae6ee23cafb5f943c59d2671 100644 (file)
@@ -1,13 +1,24 @@
 /*
  * InspIRCd -- Internet Relay Chat Daemon
  *
- *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
- *   Copyright (C) 2006-2009 Robin Burchell <robin+git@viroteck.net>
- *   Copyright (C) 2006-2007, 2009 Dennis Friis <peavey@inspircd.org>
- *   Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
+ *   Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
+ *   Copyright (C) 2018 systocrat <systocrat@outlook.com>
+ *   Copyright (C) 2018 Dylan Frank <b00mx0r@aureus.pw>
+ *   Copyright (C) 2013, 2016-2021 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
+ *   Copyright (C) 2013 ChrisTX <xpipe@hotmail.de>
+ *   Copyright (C) 2013 Adam <Adam@anope.org>
+ *   Copyright (C) 2012-2016, 2018 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2012 DjSlash <djslash@djslash.org>
+ *   Copyright (C) 2011 jackmcbarn <jackmcbarn@inspircd.org>
+ *   Copyright (C) 2009-2011 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
- *   Copyright (C) 2008 Oliver Lupton <oliverlupton@gmail.com>
- *   Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
+ *   Copyright (C) 2008 John Brooks <special@inspircd.org>
+ *   Copyright (C) 2007, 2009 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2006-2009 Robin Burchell <robin+git@viroteck.net>
+ *   Copyright (C) 2004, 2006-2009 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"
-#include <stdarg.h>
-#include "socketengine.h"
 #include "xline.h"
 
-already_sent_t LocalUser::already_sent_id = 0;
+ClientProtocol::MessageList LocalUser::sendmsglist;
 
 bool User::IsNoticeMaskSet(unsigned char sm)
 {
@@ -37,70 +46,97 @@ bool User::IsNoticeMaskSet(unsigned char sm)
        return (snomasks[sm-65]);
 }
 
-bool User::IsModeSet(unsigned char m)
+bool User::IsModeSet(unsigned char m) const
 {
        ModeHandler* mh = ServerInstance->Modes->FindMode(m, MODETYPE_USER);
        return (mh && modes[mh->GetId()]);
 }
 
-const char* User::FormatModes(bool showparameters)
+std::string User::GetModeLetters(bool includeparams) const
 {
-       static std::string data;
+       std::string ret(1, '+');
        std::string params;
-       data.clear();
 
-       for (unsigned char n = 0; n < 64; n++)
+       for (unsigned char i = 'A'; i <= 'z'; i++)
        {
-               ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
-               if (mh && IsModeSet(mh))
+               const ModeHandler* const mh = ServerInstance->Modes.FindMode(i, MODETYPE_USER);
+               if ((!mh) || (!IsModeSet(mh)))
+                       continue;
+
+               ret.push_back(mh->GetModeChar());
+               if ((includeparams) && (mh->NeedsParam(true)))
                {
-                       data.push_back(n + 65);
-                       if (showparameters && mh->GetNumParams(true))
-                       {
-                               std::string p = mh->GetUserParameter(this);
-                               if (p.length())
-                                       params.append(" ").append(p);
-                       }
+                       const std::string val = mh->GetUserParameter(this);
+                       if (!val.empty())
+                               params.append(1, ' ').append(val);
                }
        }
-       data += params;
-       return data.c_str();
+
+       ret += params;
+       return ret;
 }
 
-User::User(const std::string& uid, Server* srv, int type)
-       : uuid(uid), server(srv), usertype(type)
+User::User(const std::string& uid, Server* srv, UserType type)
+       : age(ServerInstance->Time())
+       , signon(0)
+       , uuid(uid)
+       , server(srv)
+       , registered(REG_NONE)
+       , quitting(false)
+       , usertype(type)
 {
-       age = ServerInstance->Time();
-       signon = 0;
-       registered = 0;
-       quitting = false;
        client_sa.sa.sa_family = AF_UNSPEC;
 
        ServerInstance->Logs->Log("USERS", LOG_DEBUG, "New UUID for user: %s", uuid.c_str());
 
-       if (!ServerInstance->Users->uuidlist.insert(std::make_pair(uuid, this)).second)
-               throw CoreException("Duplicate UUID "+std::string(uuid)+" in User constructor");
+       if (srv->IsULine())
+               ServerInstance->Users.all_ulines.push_back(this);
+
+       // Do not insert FakeUsers into the uuidlist so FindUUID() won't return them which is the desired behavior
+       if (type != USERTYPE_SERVER)
+       {
+               if (!ServerInstance->Users.uuidlist.insert(std::make_pair(uuid, this)).second)
+                       throw CoreException("Duplicate UUID in User constructor: " + uuid);
+       }
 }
 
 LocalUser::LocalUser(int myfd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* servaddr)
-       : User(ServerInstance->UIDGen.GetUID(), ServerInstance->FakeClient->server, USERTYPE_LOCAL), eh(this),
-       bytes_in(0), bytes_out(0), cmds_in(0), cmds_out(0), nping(0), CommandFloodPenalty(0),
-       already_sent(0)
-{
-       exempt = quitting_sendq = false;
-       idle_lastmsg = 0;
-       ident = "unknown";
-       lastping = 0;
+       : User(ServerInstance->UIDGen.GetUID(), ServerInstance->FakeClient->server, USERTYPE_LOCAL)
+       , eh(this)
+       , serializer(NULL)
+       , bytes_in(0)
+       , bytes_out(0)
+       , cmds_in(0)
+       , cmds_out(0)
+       , quitting_sendq(false)
+       , lastping(true)
+       , exempt(false)
+       , nextping(0)
+       , idle_lastmsg(0)
+       , CommandFloodPenalty(0)
+       , already_sent(0)
+{
+       signon = ServerInstance->Time();
+       // The user's default nick is their UUID
+       nick = uuid;
+       ident = uuid;
        eh.SetFd(myfd);
        memcpy(&client_sa, client, sizeof(irc::sockets::sockaddrs));
        memcpy(&server_sa, servaddr, sizeof(irc::sockets::sockaddrs));
-       dhost = host = GetIPString();
+       ChangeRealHost(GetIPString(), true);
+}
+
+LocalUser::LocalUser(int myfd, const std::string& uid, Serializable::Data& data)
+       : User(uid, ServerInstance->FakeClient->server, USERTYPE_LOCAL)
+       , eh(this)
+       , already_sent(0)
+{
+       eh.SetFd(myfd);
+       Deserialize(data);
 }
 
 User::~User()
 {
-       if (ServerInstance->FindUUID(uuid))
-               ServerInstance->Logs->Log("USERS", LOG_DEFAULT, "User destructor for %s called without cull", uuid.c_str());
 }
 
 const std::string& User::MakeHost()
@@ -108,8 +144,7 @@ const std::string& User::MakeHost()
        if (!this->cached_makehost.empty())
                return this->cached_makehost;
 
-       // XXX: Is there really a need to cache this?
-       this->cached_makehost = ident + "@" + host;
+       this->cached_makehost = ident + "@" + GetRealHost();
        return this->cached_makehost;
 }
 
@@ -118,7 +153,6 @@ const std::string& User::MakeHostIP()
        if (!this->cached_hostip.empty())
                return this->cached_hostip;
 
-       // XXX: Is there really a need to cache this?
        this->cached_hostip = ident + "@" + this->GetIPString();
        return this->cached_hostip;
 }
@@ -128,8 +162,7 @@ const std::string& User::GetFullHost()
        if (!this->cached_fullhost.empty())
                return this->cached_fullhost;
 
-       // XXX: Is there really a need to cache this?
-       this->cached_fullhost = nick + "!" + ident + "@" + dhost;
+       this->cached_fullhost = nick + "!" + ident + "@" + GetDisplayedHost();
        return this->cached_fullhost;
 }
 
@@ -138,46 +171,25 @@ const std::string& User::GetFullRealHost()
        if (!this->cached_fullrealhost.empty())
                return this->cached_fullrealhost;
 
-       // XXX: Is there really a need to cache this?
-       this->cached_fullrealhost = nick + "!" + ident + "@" + host;
+       this->cached_fullrealhost = nick + "!" + ident + "@" + GetRealHost();
        return this->cached_fullrealhost;
 }
 
-InviteList& LocalUser::GetInviteList()
-{
-       RemoveExpiredInvites();
-       return invites;
-}
-
-bool LocalUser::RemoveInvite(Channel* chan)
-{
-       Invitation* inv = Invitation::Find(chan, this);
-       if (inv)
-       {
-               delete inv;
-               return true;
-       }
-       return false;
-}
-
-void LocalUser::RemoveExpiredInvites()
-{
-       Invitation::Find(NULL, this);
-}
-
-bool User::HasModePermission(unsigned char, ModeType)
+bool User::HasModePermission(const ModeHandler* mh) const
 {
        return true;
 }
 
-bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
+bool LocalUser::HasModePermission(const ModeHandler* mh) const
 {
        if (!this->IsOper())
                return false;
 
-       if (mode < 'A' || mode > ('A' + 64)) return false;
+       const unsigned char mode = mh->GetModeChar();
+       if (!ModeParser::IsModeChar(mode))
+               return false;
 
-       return ((type == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
+       return ((mh->GetModeType() == MODETYPE_USER ? oper->AllowedUserModes : oper->AllowedChanModes))[(mode - 'A')];
 
 }
 /*
@@ -187,12 +199,12 @@ bool LocalUser::HasModePermission(unsigned char mode, ModeType type)
  * allowing remote kills, etc - but if they have access to the src, they most likely have
  * access to the conf - so it's an end to a means either way.
  */
-bool User::HasPermission(const std::string&)
+bool User::HasCommandPermission(const std::string&)
 {
        return true;
 }
 
-bool LocalUser::HasPermission(const std::string &command)
+bool LocalUser::HasCommandPermission(const std::string& command)
 {
        // are they even an oper at all?
        if (!this->IsOper())
@@ -200,41 +212,33 @@ bool LocalUser::HasPermission(const std::string &command)
                return false;
        }
 
-       if (oper->AllowedOperCommands.find(command) != oper->AllowedOperCommands.end())
-               return true;
-       else if (oper->AllowedOperCommands.find("*") != oper->AllowedOperCommands.end())
-               return true;
-
-       return false;
+       return oper->AllowedOperCommands.Contains(command);
 }
 
-bool User::HasPrivPermission(const std::string &privstr, bool noisy)
+bool User::HasPrivPermission(const std::string& privstr)
 {
        return true;
 }
 
-bool LocalUser::HasPrivPermission(const std::string &privstr, bool noisy)
+bool LocalUser::HasPrivPermission(const std::string& privstr)
 {
        if (!this->IsOper())
-       {
-               if (noisy)
-                       this->WriteNotice("You are not an oper");
                return false;
-       }
 
-       if (oper->AllowedPrivs.find(privstr) != oper->AllowedPrivs.end())
-       {
-               return true;
-       }
-       else if (oper->AllowedPrivs.find("*") != oper->AllowedPrivs.end())
-       {
-               return true;
-       }
+       return oper->AllowedPrivs.Contains(privstr);
+}
 
-       if (noisy)
-               this->WriteNotice("Oper type " + oper->name + " does not have access to priv " + privstr);
+bool User::HasSnomaskPermission(char chr) const
+{
+       return true;
+}
 
-       return false;
+bool LocalUser::HasSnomaskPermission(char chr) const
+{
+       if (!this->IsOper() || !ModeParser::IsModeChar(chr))
+               return false;
+
+       return this->oper->AllowedSnomasks[chr - 'A'];
 }
 
 void UserIOHandler::OnDataReady()
@@ -249,49 +253,68 @@ void UserIOHandler::OnDataReady()
                        user->nick.c_str(), (unsigned long)recvq.length(), user->MyClass->GetRecvqMax());
                return;
        }
+
        unsigned long sendqmax = ULONG_MAX;
        if (!user->HasPrivPermission("users/flood/increased-buffers"))
                sendqmax = user->MyClass->GetSendqSoftMax();
+
        unsigned long penaltymax = ULONG_MAX;
        if (!user->HasPrivPermission("users/flood/no-fakelag"))
                penaltymax = user->MyClass->GetPenaltyThreshold() * 1000;
 
+       // The cleaned message sent by the user or empty if not found yet.
+       std::string line;
+
+       // The position of the most \n character or npos if not found yet.
+       std::string::size_type eolpos;
+
+       // The position within the recvq of the current character.
+       std::string::size_type qpos;
+
        while (user->CommandFloodPenalty < penaltymax && getSendQSize() < sendqmax)
        {
-               std::string line;
-               line.reserve(ServerInstance->Config->Limits.MaxLine);
-               std::string::size_type qpos = 0;
-               while (qpos < recvq.length())
+               // Check the newly received data for an EOL.
+               eolpos = recvq.find('\n', checked_until);
+               if (eolpos == std::string::npos)
+               {
+                       checked_until = recvq.length();
+                       return;
+               }
+
+               // We've found a line! Clean it up and move it to the line buffer.
+               line.reserve(eolpos);
+               for (qpos = 0; qpos < eolpos; ++qpos)
                {
-                       char c = recvq[qpos++];
+                       char c = recvq[qpos];
                        switch (c)
                        {
-                       case '\0':
-                               c = ' ';
-                               break;
-                       case '\r':
-                               continue;
-                       case '\n':
-                               goto eol_found;
+                               case '\0':
+                                       c = ' ';
+                                       break;
+                               case '\r':
+                                       continue;
                        }
-                       if (line.length() < ServerInstance->Config->Limits.MaxLine - 2)
-                               line.push_back(c);
+
+                       line.push_back(c);
                }
-               // if we got here, the recvq ran out before we found a newline
-               return;
-eol_found:
+
                // just found a newline. Terminate the string, and pull it out of recvq
-               recvq = recvq.substr(qpos);
+               recvq.erase(0, eolpos + 1);
+               checked_until = 0;
 
                // TODO should this be moved to when it was inserted in recvq?
                ServerInstance->stats.Recv += qpos;
                user->bytes_in += qpos;
                user->cmds_in++;
 
-               ServerInstance->Parser->ProcessBuffer(line, user);
+               ServerInstance->Parser.ProcessBuffer(user, line);
                if (user->quitting)
                        return;
+
+               // clear() does not reclaim memory associated with the string, so our .reserve() call is safe
+               line.clear();
        }
+
        if (user->CommandFloodPenalty >= penaltymax && !user->MyClass->fakelag)
                ServerInstance->Users->QuitUser(user, "Excess Flood");
 }
@@ -314,9 +337,25 @@ void UserIOHandler::AddWriteBuf(const std::string &data)
        WriteData(data);
 }
 
-void UserIOHandler::OnError(BufferedSocketError)
+void UserIOHandler::SwapInternals(UserIOHandler& other)
 {
-       ServerInstance->Users->QuitUser(user, getError());
+       StreamSocket::SwapInternals(other);
+       std::swap(checked_until, other.checked_until);
+}
+
+bool UserIOHandler::OnSetEndPoint(const irc::sockets::sockaddrs& server, const irc::sockets::sockaddrs& client)
+{
+       memcpy(&user->server_sa, &server, sizeof(irc::sockets::sockaddrs));
+       user->SetClientIP(client);
+       return !user->quitting;
+}
+
+void UserIOHandler::OnError(BufferedSocketError sockerr)
+{
+       ModResult res;
+       FIRST_MOD_RESULT(OnConnectionFail, res, (user, sockerr));
+       if (res != MOD_RES_ALLOW)
+               ServerInstance->Users->QuitUser(user, getError());
 }
 
 CullResult User::cull()
@@ -324,16 +363,17 @@ CullResult User::cull()
        if (!quitting)
                ServerInstance->Users->QuitUser(this, "Culled without QuitUser");
 
-       if (client_sa.sa.sa_family != AF_UNSPEC)
+       if (client_sa.family() != AF_UNSPEC)
                ServerInstance->Users->RemoveCloneCounts(this);
 
+       if (server->IsULine())
+               stdalgo::erase(ServerInstance->Users->all_ulines, this);
+
        return Extensible::cull();
 }
 
 CullResult LocalUser::cull()
 {
-       ServerInstance->Users->local_users.erase(this);
-       ClearInvites();
        eh.cull();
        return User::cull();
 }
@@ -342,102 +382,95 @@ CullResult FakeUser::cull()
 {
        // Fake users don't quit, they just get culled.
        quitting = true;
-       // Fake users are not inserted into UserManager::clientlist, they're only in the uuidlist
-       ServerInstance->Users->uuidlist.erase(uuid);
+       // Fake users are not inserted into UserManager::clientlist or uuidlist, so we don't need to modify those here
        return User::cull();
 }
 
 void User::Oper(OperInfo* info)
 {
        ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
-       if (this->IsModeSet(opermh))
-               this->UnOper();
-
-       this->SetMode(opermh, true);
+       if (opermh)
+       {
+               if (this->IsModeSet(opermh))
+                       this->UnOper();
+               this->SetMode(opermh, true);
+       }
        this->oper = info;
-       this->WriteCommand("MODE", "+o");
+
+       LocalUser* localuser = IS_LOCAL(this);
+       if (localuser)
+       {
+               Modes::ChangeList changelist;
+               changelist.push_add(opermh);
+               ClientProtocol::Events::Mode modemsg(ServerInstance->FakeClient, NULL, localuser, changelist);
+               localuser->Send(modemsg);
+       }
+
        FOREACH_MOD(OnOper, (this, info->name));
 
        std::string opername;
        if (info->oper_block)
                opername = info->oper_block->getString("name");
 
-       if (IS_LOCAL(this))
-       {
-               LocalUser* l = IS_LOCAL(this);
-               std::string vhost = oper->getConfig("vhost");
-               if (!vhost.empty())
-                       l->ChangeDisplayedHost(vhost.c_str());
-               std::string opClass = oper->getConfig("class");
-               if (!opClass.empty())
-                       l->SetClass(opClass);
-       }
-
-       ServerInstance->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s (using oper '%s')",
-               nick.c_str(), ident.c_str(), host.c_str(), oper->name.c_str(), opername.c_str());
-       this->WriteNumeric(RPL_YOUAREOPER, ":You are now %s %s", strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->name.c_str());
+       ServerInstance->SNO->WriteToSnoMask('o', "%s (%s@%s) is now a server operator of type %s (using oper '%s')",
+               nick.c_str(), ident.c_str(), GetRealHost().c_str(), oper->name.c_str(), opername.c_str());
+       this->WriteNumeric(RPL_YOUAREOPER, InspIRCd::Format("You are now %s %s", strchr("aeiouAEIOU", oper->name[0]) ? "an" : "a", oper->name.c_str()));
 
-       ServerInstance->Logs->Log("OPER", LOG_DEFAULT, "%s opered as type: %s", GetFullRealHost().c_str(), oper->name.c_str());
        ServerInstance->Users->all_opers.push_back(this);
 
        // Expand permissions from config for faster lookup
-       if (IS_LOCAL(this))
+       if (localuser)
                oper->init();
 
        FOREACH_MOD(OnPostOper, (this, oper->name, opername));
 }
 
+namespace
+{
+       bool ParseModeList(std::bitset<64>& modeset, ConfigTag* tag, const std::string& field)
+       {
+               std::string modes;
+               bool hasmodes = tag->readString(field, modes);
+               for (std::string::const_iterator iter = modes.begin(); iter != modes.end(); ++iter)
+               {
+                       const char& chr = *iter;
+                       if (chr == '*')
+                               modeset.set();
+                       else if (ModeParser::IsModeChar(chr))
+                               modeset.set(chr - 'A');
+                       else
+                               ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "'%c' is not a valid value for <class:%s>, ignoring...", chr, field.c_str());
+               }
+               return hasmodes;
+       }
+}
+
 void OperInfo::init()
 {
-       AllowedOperCommands.clear();
-       AllowedPrivs.clear();
+       AllowedOperCommands.Clear();
+       AllowedPrivs.Clear();
        AllowedUserModes.reset();
        AllowedChanModes.reset();
+       AllowedSnomasks.reset();
        AllowedUserModes['o' - 'A'] = true; // Call me paranoid if you want.
 
+       bool defaultsnomasks = true;
        for(std::vector<reference<ConfigTag> >::iterator iter = class_blocks.begin(); iter != class_blocks.end(); ++iter)
        {
                ConfigTag* tag = *iter;
-               std::string mycmd, mypriv;
-               /* Process commands */
-               irc::spacesepstream CommandList(tag->getString("commands"));
-               while (CommandList.GetToken(mycmd))
-               {
-                       AllowedOperCommands.insert(mycmd);
-               }
 
-               irc::spacesepstream PrivList(tag->getString("privs"));
-               while (PrivList.GetToken(mypriv))
-               {
-                       AllowedPrivs.insert(mypriv);
-               }
+               AllowedOperCommands.AddList(tag->getString("commands"));
+               AllowedPrivs.AddList(tag->getString("privs"));
 
-               std::string modes = tag->getString("usermodes");
-               for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
-               {
-                       if (*c == '*')
-                       {
-                               this->AllowedUserModes.set();
-                       }
-                       else if (*c >= 'A' && *c < 'z')
-                       {
-                               this->AllowedUserModes[*c - 'A'] = true;
-                       }
-               }
-
-               modes = tag->getString("chanmodes");
-               for (std::string::const_iterator c = modes.begin(); c != modes.end(); ++c)
-               {
-                       if (*c == '*')
-                       {
-                               this->AllowedChanModes.set();
-                       }
-                       else if (*c >= 'A' && *c < 'z')
-                       {
-                               this->AllowedChanModes[*c - 'A'] = true;
-                       }
-               }
+               ParseModeList(AllowedChanModes, tag, "chanmodes");
+               ParseModeList(AllowedUserModes, tag, "usermodes");
+               if (ParseModeList(AllowedSnomasks, tag, "snomasks"))
+                       defaultsnomasks = false;
        }
+
+       // Compatibility for older configs that don't have the snomasks field.
+       if (defaultsnomasks)
+               AllowedSnomasks.set();
 }
 
 void User::UnOper()
@@ -452,29 +485,30 @@ void User::UnOper()
         */
        oper = NULL;
 
+       // Remove the user from the oper list
+       stdalgo::vector::swaperase(ServerInstance->Users->all_opers, this);
 
-       /* Remove all oper only modes from the user when the deoper - Bug #466*/
-       std::string moderemove("-");
+       // If the user is quitting we shouldn't remove any modes as it results in
+       // mode messages being broadcast across the network.
+       if (quitting)
+               return;
 
-       for (unsigned char letter = 'A'; letter <= 'z'; letter++)
+       /* Remove all oper only modes from the user when the deoper - Bug #466*/
+       Modes::ChangeList changelist;
+       const ModeParser::ModeHandlerMap& usermodes = ServerInstance->Modes->GetModes(MODETYPE_USER);
+       for (ModeParser::ModeHandlerMap::const_iterator i = usermodes.begin(); i != usermodes.end(); ++i)
        {
-               ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_USER);
-               if (mh && mh->NeedsOper())
-                       moderemove += letter;
+               ModeHandler* mh = i->second;
+               if (mh->NeedsOper())
+                       changelist.push_remove(mh);
        }
 
-
-       std::vector<std::string> parameters;
-       parameters.push_back(this->nick);
-       parameters.push_back(moderemove);
-
-       ServerInstance->Modes->Process(parameters, this);
-
-       // Remove the user from the oper list
-       stdalgo::vector::swaperase(ServerInstance->Users->all_opers, this);
+       ServerInstance->Modes->Process(this, NULL, this, changelist);
 
        ModeHandler* opermh = ServerInstance->Modes->FindMode('o', MODETYPE_USER);
-       this->SetMode(opermh, false);
+       if (opermh)
+               this->SetMode(opermh, false);
+       FOREACH_MOD(OnPostDeoper, (this));
 }
 
 /*
@@ -491,7 +525,7 @@ void LocalUser::CheckClass(bool clone_count)
        }
        else if (a->type == CC_DENY)
        {
-               ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection"));
+               ServerInstance->Users->QuitUser(this, a->config->getString("reason", "Unauthorised connection", 1));
                return;
        }
        else if (clone_count)
@@ -501,19 +535,25 @@ void LocalUser::CheckClass(bool clone_count)
                {
                        ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (local)");
                        if (a->maxconnwarn)
-                               ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString().c_str());
+                       {
+                               ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum local connections for the %s class (%ld) exceeded by %s",
+                                       a->name.c_str(), a->GetMaxLocal(), this->GetIPString().c_str());
+                       }
                        return;
                }
                else if ((a->GetMaxGlobal()) && (clonecounts.global > a->GetMaxGlobal()))
                {
                        ServerInstance->Users->QuitUser(this, "No more connections allowed from your host via this connect class (global)");
                        if (a->maxconnwarn)
-                               ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString().c_str());
+                       {
+                               ServerInstance->SNO->WriteToSnoMask('a', "WARNING: maximum global connections for the %s class (%ld) exceeded by %s",
+                               a->name.c_str(), a->GetMaxGlobal(), this->GetIPString().c_str());
+                       }
                        return;
                }
        }
 
-       this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
+       this->nextping = ServerInstance->Time() + a->GetPingTime();
 }
 
 bool LocalUser::CheckLines(bool doZline)
@@ -545,7 +585,7 @@ void LocalUser::FullConnect()
        /*
         * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT.
         * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
-        * may put the user into a totally seperate class with different restrictions! so we *must* check again.
+        * may put the user into a totally separate class with different restrictions! so we *must* check again.
         * Don't remove this! -- w00t
         */
        MyClass = NULL;
@@ -556,50 +596,23 @@ void LocalUser::FullConnect()
        if (quitting)
                return;
 
-       this->WriteNumeric(RPL_WELCOME, ":Welcome to the %s IRC Network %s", ServerInstance->Config->Network.c_str(), GetFullRealHost().c_str());
-       this->WriteNumeric(RPL_YOURHOSTIS, ":Your host is %s, running version %s", ServerInstance->Config->ServerName.c_str(), INSPIRCD_BRANCH);
-       this->WriteNumeric(RPL_SERVERCREATED, ":This server was created %s %s", __TIME__, __DATE__);
-
-       const std::string& modelist = ServerInstance->Modes->GetModeListFor004Numeric();
-       this->WriteNumeric(RPL_SERVERVERSION, "%s %s %s", ServerInstance->Config->ServerName.c_str(), INSPIRCD_BRANCH, modelist.c_str());
-
-       ServerInstance->ISupport.SendTo(this);
-
-       /* Now registered */
-       if (ServerInstance->Users->unregistered_count)
-               ServerInstance->Users->unregistered_count--;
-
-       /* Trigger MOTD and LUSERS output, give modules a chance too */
-       ModResult MOD_RESULT;
-       std::string command("LUSERS");
-       std::vector<std::string> parameters;
-       FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
-       if (!MOD_RESULT)
-               ServerInstance->Parser->CallHandler(command, parameters, this);
-
-       MOD_RESULT = MOD_RES_PASSTHRU;
-       command = "MOTD";
-       FIRST_MOD_RESULT(OnPreCommand, MOD_RESULT, (command, parameters, this, true, command));
-       if (!MOD_RESULT)
-               ServerInstance->Parser->CallHandler(command, parameters, this);
-
-       if (ServerInstance->Config->RawLog)
-               WriteServ("PRIVMSG %s :*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.", nick.c_str());
-
        /*
         * We don't set REG_ALL until triggering OnUserConnect, so some module events don't spew out stuff
         * for a user that doesn't exist yet.
         */
        FOREACH_MOD(OnUserConnect, (this));
 
+       /* Now registered */
+       if (ServerInstance->Users->unregistered_count)
+               ServerInstance->Users->unregistered_count--;
        this->registered = REG_ALL;
 
        FOREACH_MOD(OnPostConnect, (this));
 
        ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d (class %s): %s (%s) [%s]",
-               this->GetServerPort(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->fullname.c_str());
+               this->server_sa.port(), this->MyClass->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->GetRealName().c_str());
        ServerInstance->Logs->Log("BANCACHE", LOG_DEBUG, "BanCache: Adding NEGATIVE hit for " + this->GetIPString());
-       ServerInstance->BanCache->AddHit(this->GetIPString(), "", "");
+       ServerInstance->BanCache.AddHit(this->GetIPString(), "", "");
        // reset the flood penalty (which could have been raised due to things like auto +x)
        CommandFloodPenalty = 0;
 }
@@ -607,13 +620,14 @@ void LocalUser::FullConnect()
 void User::InvalidateCache()
 {
        /* Invalidate cache */
+       cachedip.clear();
        cached_fullhost.clear();
        cached_hostip.clear();
        cached_makehost.clear();
        cached_fullrealhost.clear();
 }
 
-bool User::ChangeNick(const std::string& newnick, bool force, time_t newts)
+bool User::ChangeNick(const std::string& newnick, time_t newts)
 {
        if (quitting)
        {
@@ -621,21 +635,10 @@ bool User::ChangeNick(const std::string& newnick, bool force, time_t newts)
                return false;
        }
 
-       if (!force)
+       User* const InUse = ServerInstance->FindNickOnly(newnick);
+       if (InUse == this)
        {
-               ModResult MOD_RESULT;
-               FIRST_MOD_RESULT(OnUserPreNick, MOD_RESULT, (this, newnick));
-
-               if (MOD_RESULT == MOD_RES_DENY)
-               {
-                       ServerInstance->stats.Collisions++;
-                       return false;
-               }
-       }
-
-       if (assign(newnick) == assign(nick))
-       {
-               // case change, don't need to check Q:lines and such
+               // case change, don't need to check campers
                // and, if it's identical including case, we can leave right now
                // We also don't update the nick TS if it's a case change, either
                if (newnick == nick)
@@ -643,42 +646,6 @@ bool User::ChangeNick(const std::string& newnick, bool force, time_t newts)
        }
        else
        {
-               /*
-                * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
-                * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
-                * Thanks Kein for finding this. -- w00t
-                *
-                * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
-                *              -- w00t
-                */
-               if (IS_LOCAL(this) && !force)
-               {
-                       XLine* mq = ServerInstance->XLines->MatchesLine("Q",newnick);
-                       if (mq)
-                       {
-                               if (this->registered == REG_ALL)
-                               {
-                                       ServerInstance->SNO->WriteGlobalSno('a', "Q-Lined nickname %s from %s: %s",
-                                               newnick.c_str(), GetFullRealHost().c_str(), mq->reason.c_str());
-                               }
-                               this->WriteNumeric(ERR_ERRONEUSNICKNAME, "%s :Invalid nickname: %s", newnick.c_str(), mq->reason.c_str());
-                               return false;
-                       }
-
-                       if (ServerInstance->Config->RestrictBannedUsers)
-                       {
-                               for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
-                               {
-                                       Channel* chan = (*i)->chan;
-                                       if (chan->GetPrefixValue(this) < VOICE_VALUE && chan->IsBanned(this))
-                                       {
-                                               this->WriteNumeric(ERR_CANNOTSENDTOCHAN, "%s :Cannot send to channel (you're banned)", chan->name.c_str());
-                                               return false;
-                                       }
-                               }
-                       }
-               }
-
                /*
                 * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
                 * then we have a potential collide. Check whether someone else is camping on the nick
@@ -688,26 +655,18 @@ bool User::ChangeNick(const std::string& newnick, bool force, time_t newts)
                 * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
                 * because the nick is already (rightfully) in use. -- w00t
                 */
-               User* InUse = ServerInstance->FindNickOnly(newnick);
-               if (InUse && (InUse != this))
+               if (InUse)
                {
                        if (InUse->registered != REG_ALL)
                        {
                                /* force the camper to their UUID, and ask them to re-send a NICK. */
-                               InUse->WriteFrom(InUse, "NICK %s", InUse->uuid.c_str());
-                               InUse->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname overruled.", InUse->nick.c_str());
-
-                               ServerInstance->Users->clientlist.erase(InUse->nick);
-                               ServerInstance->Users->clientlist[InUse->uuid] = InUse;
-
-                               InUse->nick = InUse->uuid;
-                               InUse->InvalidateCache();
-                               InUse->registered &= ~REG_NICK;
+                               LocalUser* const localuser = static_cast<LocalUser*>(InUse);
+                               localuser->OverruleNick();
                        }
                        else
                        {
                                /* No camping, tell the incoming user  to stop trying to change nick ;p */
-                               this->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname is already in use.", newnick.c_str());
+                               this->WriteNumeric(ERR_NICKNAMEINUSE, newnick, "Nickname is already in use.");
                                return false;
                        }
                }
@@ -716,8 +675,12 @@ bool User::ChangeNick(const std::string& newnick, bool force, time_t newts)
        }
 
        if (this->registered == REG_ALL)
-               this->WriteCommon("NICK %s",newnick.c_str());
-       std::string oldnick = nick;
+       {
+               ClientProtocol::Messages::Nick nickmsg(this, newnick);
+               ClientProtocol::Event nickevent(ServerInstance->GetRFCEvents().nick, nickmsg);
+               this->WriteCommonRaw(nickevent, true);
+       }
+       const std::string oldnick = nick;
        nick = newnick;
 
        InvalidateCache();
@@ -730,24 +693,24 @@ bool User::ChangeNick(const std::string& newnick, bool force, time_t newts)
        return true;
 }
 
-int LocalUser::GetServerPort()
+void LocalUser::OverruleNick()
 {
-       switch (this->server_sa.sa.sa_family)
        {
-               case AF_INET6:
-                       return htons(this->server_sa.in6.sin6_port);
-               case AF_INET:
-                       return htons(this->server_sa.in4.sin_port);
+               ClientProtocol::Messages::Nick nickmsg(this, this->uuid);
+               this->Send(ServerInstance->GetRFCEvents().nick, nickmsg);
        }
-       return 0;
+       this->WriteNumeric(ERR_NICKNAMEINUSE, this->nick, "Nickname overruled.");
+
+       // Clear the bit before calling ChangeNick() to make it NOT run the OnUserPostNick() hook
+       this->registered &= ~REG_NICK;
+       this->ChangeNick(this->uuid);
 }
 
 const std::string& User::GetIPString()
 {
-       int port;
        if (cachedip.empty())
        {
-               irc::sockets::satoap(client_sa, cachedip, port);
+               cachedip = client_sa.addr();
                /* IP addresses starting with a : on irc are a Bad Thing (tm) */
                if (cachedip[0] == ':')
                        cachedip.insert(cachedip.begin(),1,'0');
@@ -756,10 +719,30 @@ const std::string& User::GetIPString()
        return cachedip;
 }
 
+const std::string& User::GetHost(bool uncloak) const
+{
+       return uncloak ? GetRealHost() : GetDisplayedHost();
+}
+
+const std::string& User::GetDisplayedHost() const
+{
+       return displayhost.empty() ? realhost : displayhost;
+}
+
+const std::string& User::GetRealHost() const
+{
+       return realhost;
+}
+
+const std::string& User::GetRealName() const
+{
+       return realname;
+}
+
 irc::sockets::cidr_mask User::GetCIDRMask()
 {
-       int range = 0;
-       switch (client_sa.sa.sa_family)
+       unsigned char range = 0;
+       switch (client_sa.family())
        {
                case AF_INET6:
                        range = ServerInstance->Config->c_ipv6_range;
@@ -771,269 +754,229 @@ irc::sockets::cidr_mask User::GetCIDRMask()
        return irc::sockets::cidr_mask(client_sa, range);
 }
 
-bool User::SetClientIP(const char* sip, bool recheck_eline)
+bool User::SetClientIP(const std::string& address)
 {
-       cachedip.clear();
-       cached_hostip.clear();
-       return irc::sockets::aptosa(sip, 0, client_sa);
+       irc::sockets::sockaddrs sa;
+       if (!irc::sockets::aptosa(address, client_sa.port(), sa))
+               return false;
+
+       User::SetClientIP(sa);
+       return true;
 }
 
-void User::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
+void User::SetClientIP(const irc::sockets::sockaddrs& sa)
 {
-       cachedip.clear();
-       cached_hostip.clear();
+       const std::string oldip(GetIPString());
        memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs));
+       this->InvalidateCache();
+
+       // If the users hostname was their IP then update it.
+       if (GetRealHost() == oldip)
+               ChangeRealHost(GetIPString(), false);
+       if (GetDisplayedHost() == oldip)
+               ChangeDisplayedHost(GetIPString());
 }
 
-bool LocalUser::SetClientIP(const char* sip, bool recheck_eline)
+bool LocalUser::SetClientIP(const std::string& address)
 {
        irc::sockets::sockaddrs sa;
-       if (!irc::sockets::aptosa(sip, 0, sa))
-               // Invalid
+       if (!irc::sockets::aptosa(address, client_sa.port(), sa))
                return false;
 
-       LocalUser::SetClientIP(sa, recheck_eline);
+       LocalUser::SetClientIP(sa);
        return true;
 }
 
-void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa, bool recheck_eline)
+void LocalUser::SetClientIP(const irc::sockets::sockaddrs& sa)
 {
-       if (sa != client_sa)
-       {
-               User::SetClientIP(sa);
-               if (recheck_eline)
-                       this->exempt = (ServerInstance->XLines->MatchesLine("E", this) != NULL);
-
-               FOREACH_MOD(OnSetUserIP, (this));
-       }
-}
+       if (sa == client_sa)
+               return;
 
-static std::string wide_newline("\r\n");
+       ServerInstance->Users->RemoveCloneCounts(this);
+       User::SetClientIP(sa);
+       ServerInstance->Users->AddClone(this);
 
-void User::Write(const std::string& text)
-{
-}
+       // Recheck the connect class.
+       this->MyClass = NULL;
+       this->SetClass();
+       this->CheckClass();
 
-void User::Write(const char *text, ...)
-{
+       if (!quitting)
+               FOREACH_MOD(OnSetUserIP, (this));
 }
 
-void LocalUser::Write(const std::string& text)
+void LocalUser::Write(const ClientProtocol::SerializedMessage& text)
 {
        if (!SocketEngine::BoundsCheckFd(&eh))
                return;
 
-       if (text.length() > ServerInstance->Config->Limits.MaxLine - 2)
+       if (ServerInstance->Config->RawLog)
        {
-               // this should happen rarely or never. Crop the string at 512 and try again.
-               std::string try_again = text.substr(0, ServerInstance->Config->Limits.MaxLine - 2);
-               Write(try_again);
-               return;
-       }
+               if (text.empty())
+                       return;
 
-       ServerInstance->Logs->Log("USEROUTPUT", LOG_RAWIO, "C[%s] O %s", uuid.c_str(), text.c_str());
+               std::string::size_type nlpos = text.find_first_of("\r\n", 0, 2);
+               if (nlpos == std::string::npos)
+                       nlpos = text.length(); // TODO is this ok, test it
+
+               ServerInstance->Logs->Log("USEROUTPUT", LOG_RAWIO, "C[%s] O %.*s", uuid.c_str(), (int) nlpos, text.c_str());
+       }
 
        eh.AddWriteBuf(text);
-       eh.AddWriteBuf(wide_newline);
 
-       ServerInstance->stats.Sent += text.length() + 2;
-       this->bytes_out += text.length() + 2;
+       const size_t bytessent = text.length() + 2;
+       ServerInstance->stats.Sent += bytessent;
+       this->bytes_out += bytessent;
        this->cmds_out++;
 }
 
-/** Write()
- */
-void LocalUser::Write(const char *text, ...)
-{
-       std::string textbuffer;
-       VAFORMAT(textbuffer, text, text);
-       this->Write(textbuffer);
-}
-
-void User::WriteServ(const std::string& text)
+void LocalUser::Send(ClientProtocol::Event& protoev)
 {
-       this->Write(":%s %s",ServerInstance->Config->ServerName.c_str(),text.c_str());
-}
+       if (!serializer)
+       {
+               ServerInstance->Logs->Log("USERS", LOG_DEBUG, "BUG: LocalUser::Send() called on %s who does not have a serializer!",
+                       GetFullRealHost().c_str());
+               return;
+       }
 
-/** WriteServ()
- *  Same as Write(), except `text' is prefixed with `:server.name '.
- */
-void User::WriteServ(const char* text, ...)
-{
-       std::string textbuffer;
-       VAFORMAT(textbuffer, text, text);
-       this->WriteServ(textbuffer);
+       // In the most common case a static LocalUser field, sendmsglist, is passed to the event to be
+       // populated. The list is cleared before returning.
+       // To handle re-enters, if sendmsglist is non-empty upon entering the method then a temporary
+       // list is used instead of the static one.
+       if (sendmsglist.empty())
+       {
+               Send(protoev, sendmsglist);
+               sendmsglist.clear();
+       }
+       else
+       {
+               ClientProtocol::MessageList msglist;
+               Send(protoev, msglist);
+       }
 }
 
-void User::WriteCommand(const char* command, const std::string& text)
+void LocalUser::Send(ClientProtocol::Event& protoev, ClientProtocol::MessageList& msglist)
 {
-       this->WriteServ(command + (this->registered & REG_NICK ? " " + this->nick : " *") + " " + text);
+       // Modules can personalize the messages sent per user for the event
+       protoev.GetMessagesForUser(this, msglist);
+       for (ClientProtocol::MessageList::const_iterator i = msglist.begin(); i != msglist.end(); ++i)
+       {
+               ClientProtocol::Message& curr = **i;
+               ModResult res;
+               FIRST_MOD_RESULT(OnUserWrite, res, (this, curr));
+               if (res != MOD_RES_DENY)
+                       Write(serializer->SerializeForUser(this, curr));
+       }
 }
 
-void User::WriteNumeric(unsigned int numeric, const char* text, ...)
+void User::WriteNumeric(const Numeric::Numeric& numeric)
 {
-       std::string textbuffer;
-       VAFORMAT(textbuffer, text, text);
-       this->WriteNumeric(numeric, textbuffer);
-}
+       LocalUser* const localuser = IS_LOCAL(this);
+       if (!localuser)
+               return;
 
-void User::WriteNumeric(unsigned int numeric, const std::string &text)
-{
        ModResult MOD_RESULT;
 
-       FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric, text));
+       FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric));
 
        if (MOD_RESULT == MOD_RES_DENY)
                return;
 
-       const std::string message = InspIRCd::Format(":%s %03u %s %s", ServerInstance->Config->ServerName.c_str(),
-               numeric, this->registered & REG_NICK ? this->nick.c_str() : "*", text.c_str());
-       this->Write(message);
+       ClientProtocol::Messages::Numeric numericmsg(numeric, localuser);
+       localuser->Send(ServerInstance->GetRFCEvents().numeric, numericmsg);
 }
 
-void User::WriteFrom(User *user, const std::string &text)
+void User::WriteRemoteNotice(const std::string& text)
 {
-       const std::string message = ":" + user->GetFullHost() + " " + text;
-       this->Write(message);
+       ServerInstance->PI->SendMessage(this, text, MSG_NOTICE);
 }
 
-
-/* write text from an originating user to originating user */
-
-void User::WriteFrom(User *user, const char* text, ...)
+void LocalUser::WriteRemoteNotice(const std::string& text)
 {
-       std::string textbuffer;
-       VAFORMAT(textbuffer, text, text);
-       this->WriteFrom(user, textbuffer);
-}
-
-void User::WriteCommon(const char* text, ...)
-{
-       if (this->registered != REG_ALL || quitting)
-               return;
-
-       std::string textbuffer;
-       VAFORMAT(textbuffer, text, text);
-       textbuffer = ":" + this->GetFullHost() + " " + textbuffer;
-       this->WriteCommonRaw(textbuffer, true);
+       WriteNotice(text);
 }
 
-void User::WriteCommonRaw(const std::string &line, bool include_self)
+namespace
 {
-       if (this->registered != REG_ALL || quitting)
-               return;
-
-       LocalUser::already_sent_id++;
-
-       IncludeChanList include_c(chans.begin(), chans.end());
-       std::map<User*,bool> exceptions;
-
-       exceptions[this] = include_self;
-
-       FOREACH_MOD(OnBuildNeighborList, (this, include_c, exceptions));
-
-       for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
+       class WriteCommonRawHandler : public User::ForEachNeighborHandler
        {
-               LocalUser* u = IS_LOCAL(i->first);
-               if (u && !u->quitting)
+               ClientProtocol::Event& ev;
+
+               void Execute(LocalUser* user) CXX11_OVERRIDE
                {
-                       u->already_sent = LocalUser::already_sent_id;
-                       if (i->second)
-                               u->Write(line);
+                       user->Send(ev);
                }
-       }
-       for (IncludeChanList::const_iterator v = include_c.begin(); v != include_c.end(); ++v)
-       {
-               Channel* c = (*v)->chan;
-               const UserMembList* ulist = c->GetUsers();
-               for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
+
+        public:
+               WriteCommonRawHandler(ClientProtocol::Event& protoev)
+                       : ev(protoev)
                {
-                       LocalUser* u = IS_LOCAL(i->first);
-                       if (u && u->already_sent != LocalUser::already_sent_id)
-                       {
-                               u->already_sent = LocalUser::already_sent_id;
-                               u->Write(line);
-                       }
                }
-       }
+       };
 }
 
-void User::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
+void User::WriteCommonRaw(ClientProtocol::Event& protoev, bool include_self)
 {
-       if (this->registered != REG_ALL)
-               return;
-
-       already_sent_t uniq_id = ++LocalUser::already_sent_id;
+       WriteCommonRawHandler handler(protoev);
+       ForEachNeighbor(handler, include_self);
+}
 
-       const std::string normalMessage = ":" + this->GetFullHost() + " QUIT :" + normal_text;
-       const std::string operMessage = ":" + this->GetFullHost() + " QUIT :" + oper_text;
+void User::ForEachNeighbor(ForEachNeighborHandler& handler, bool include_self)
+{
+       // The basic logic for visiting the neighbors of a user is to iterate the channel list of the user
+       // and visit all users on those channels. Because two users may share more than one common channel,
+       // we must skip users that we have already visited.
+       // To do this, we make use of a global counter and an integral 'already_sent' field in LocalUser.
+       // The global counter is incremented every time we do something for each neighbor of a user. Then,
+       // before visiting a member we examine user->already_sent. If it's equal to the current counter, we
+       // skip the member. Otherwise, we set it to the current counter and visit the member.
 
-       IncludeChanList include_c(chans.begin(), chans.end());
-       std::map<User*,bool> exceptions;
+       // Ask modules to build a list of exceptions.
+       // Mods may also exclude entire channels by erasing them from include_chans.
+       IncludeChanList include_chans(chans.begin(), chans.end());
+       std::map<User*, bool> exceptions;
+       exceptions[this] = include_self;
+       FOREACH_MOD(OnBuildNeighborList, (this, include_chans, exceptions));
 
-       FOREACH_MOD(OnBuildNeighborList, (this, include_c, exceptions));
+       // Get next id, guaranteed to differ from the already_sent field of all users
+       const already_sent_t newid = ServerInstance->Users.NextAlreadySentId();
 
-       for (std::map<User*,bool>::iterator i = exceptions.begin(); i != exceptions.end(); ++i)
+       // Handle exceptions first
+       for (std::map<User*, bool>::const_iterator i = exceptions.begin(); i != exceptions.end(); ++i)
        {
-               LocalUser* u = IS_LOCAL(i->first);
-               if (u && !u->quitting)
+               LocalUser* curr = IS_LOCAL(i->first);
+               if (curr)
                {
-                       u->already_sent = uniq_id;
-                       if (i->second)
-                               u->Write(u->IsOper() ? operMessage : normalMessage);
+                       // Mark as visited to ensure we won't visit again if there is a common channel
+                       curr->already_sent = newid;
+                       // Always treat quitting users as excluded
+                       if ((i->second) && (!curr->quitting))
+                               handler.Execute(curr);
                }
        }
-       for (IncludeChanList::const_iterator v = include_c.begin(); v != include_c.end(); ++v)
+
+       // Now consider the real neighbors
+       for (IncludeChanList::const_iterator i = include_chans.begin(); i != include_chans.end(); ++i)
        {
-               const UserMembList* ulist = (*v)->chan->GetUsers();
-               for (UserMembList::const_iterator i = ulist->begin(); i != ulist->end(); i++)
+               Channel* chan = (*i)->chan;
+               const Channel::MemberMap& userlist = chan->GetUsers();
+               for (Channel::MemberMap::const_iterator j = userlist.begin(); j != userlist.end(); ++j)
                {
-                       LocalUser* u = IS_LOCAL(i->first);
-                       if (u && (u->already_sent != uniq_id))
+                       LocalUser* curr = IS_LOCAL(j->first);
+                       // User not yet visited?
+                       if ((curr) && (curr->already_sent != newid))
                        {
-                               u->already_sent = uniq_id;
-                               u->Write(u->IsOper() ? operMessage : normalMessage);
+                               // Mark as visited and execute function
+                               curr->already_sent = newid;
+                               handler.Execute(curr);
                        }
                }
        }
 }
 
-void LocalUser::SendText(const std::string& line)
+void User::WriteRemoteNumeric(const Numeric::Numeric& numeric)
 {
-       Write(line);
-}
-
-void RemoteUser::SendText(const std::string& line)
-{
-       ServerInstance->PI->PushToClient(this, line);
-}
-
-void FakeUser::SendText(const std::string& line)
-{
-}
-
-void User::SendText(const char *text, ...)
-{
-       std::string line;
-       VAFORMAT(line, text, text);
-       SendText(line);
-}
-
-void User::SendText(const std::string& linePrefix, std::stringstream& textStream)
-{
-       std::string line;
-       std::string word;
-       while (textStream >> word)
-       {
-               size_t lineLength = linePrefix.length() + line.length() + word.length() + 3; // "\s\n\r"
-               if (lineLength > ServerInstance->Config->Limits.MaxLine)
-               {
-                       SendText(linePrefix + line);
-                       line.clear();
-               }
-               line += " " + word;
-       }
-       SendText(linePrefix + line);
+       WriteNumeric(numeric);
 }
 
 /* return 0 or 1 depending if users u and u2 share one or more common channels
@@ -1051,7 +994,7 @@ void User::SendText(const std::string& linePrefix, std::stringstream& textStream
 bool User::SharesChannelWith(User *other)
 {
        /* Outer loop */
-       for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
+       for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); ++i)
        {
                /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
                 * by replacing it with a map::find which *should* be more efficient
@@ -1062,48 +1005,84 @@ bool User::SharesChannelWith(User *other)
        return false;
 }
 
-bool User::ChangeName(const std::string& gecos)
+bool User::ChangeRealName(const std::string& real)
 {
-       if (!this->fullname.compare(gecos))
+       if (!this->realname.compare(real))
                return true;
 
        if (IS_LOCAL(this))
        {
                ModResult MOD_RESULT;
-               FIRST_MOD_RESULT(OnChangeLocalUserGECOS, MOD_RESULT, (IS_LOCAL(this),gecos));
+               FIRST_MOD_RESULT(OnPreChangeRealName, MOD_RESULT, (IS_LOCAL(this), real));
                if (MOD_RESULT == MOD_RES_DENY)
                        return false;
-               FOREACH_MOD(OnChangeName, (this,gecos));
        }
-       this->fullname.assign(gecos, 0, ServerInstance->Config->Limits.MaxGecos);
+       FOREACH_MOD(OnChangeRealName, (this, real));
+       this->realname.assign(real, 0, ServerInstance->Config->Limits.MaxReal);
 
        return true;
 }
 
 bool User::ChangeDisplayedHost(const std::string& shost)
 {
-       if (dhost == shost)
+       if (GetDisplayedHost() == shost)
                return true;
 
-       if (IS_LOCAL(this))
+       LocalUser* luser = IS_LOCAL(this);
+       if (luser)
        {
                ModResult MOD_RESULT;
-               FIRST_MOD_RESULT(OnChangeLocalUserHost, MOD_RESULT, (IS_LOCAL(this),shost));
+               FIRST_MOD_RESULT(OnPreChangeHost, MOD_RESULT, (luser, shost));
                if (MOD_RESULT == MOD_RES_DENY)
                        return false;
        }
 
        FOREACH_MOD(OnChangeHost, (this,shost));
 
-       this->dhost.assign(shost, 0, ServerInstance->Config->Limits.MaxHost);
+       if (realhost == shost)
+               this->displayhost.clear();
+       else
+               this->displayhost.assign(shost, 0, ServerInstance->Config->Limits.MaxHost);
+
        this->InvalidateCache();
 
-       if (IS_LOCAL(this))
-               this->WriteNumeric(RPL_YOURDISPLAYEDHOST, "%s :is now your displayed host", this->dhost.c_str());
+       if (IS_LOCAL(this) && this->registered != REG_NONE)
+               this->WriteNumeric(RPL_YOURDISPLAYEDHOST, this->GetDisplayedHost(), "is now your displayed host");
 
        return true;
 }
 
+void User::ChangeRealHost(const std::string& host, bool resetdisplay)
+{
+       // If the real host is the new host and we are not resetting the
+       // display host then we have nothing to do.
+       const bool changehost = (realhost != host);
+       if (!changehost && !resetdisplay)
+               return;
+
+       // If the displayhost is not set and we are not resetting it then
+       // we need to copy it to the displayhost field.
+       if (displayhost.empty() && !resetdisplay)
+               displayhost = realhost;
+
+       // If the displayhost is the new host or we are resetting it then
+       // we clear its contents to save memory.
+       else if (displayhost == host || resetdisplay)
+               displayhost.clear();
+
+       // If we are just resetting the display host then we don't need to
+       // do anything else.
+       if (!changehost)
+               return;
+
+       // Don't call the OnChangeRealHost event when initialising a user.
+       if (!realhost.empty())
+               FOREACH_MOD(OnChangeRealHost, (this, host));
+
+       realhost = host;
+       this->InvalidateCache();
+}
+
 bool User::ChangeIdent(const std::string& newident)
 {
        if (this->ident == newident)
@@ -1126,53 +1105,66 @@ bool User::ChangeIdent(const std::string& newident)
  */
 void LocalUser::SetClass(const std::string &explicit_name)
 {
-       ConnectClass *found = NULL;
-
-       ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Setting connect class for UID %s", this->uuid.c_str());
+       ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Setting connect class for %s (%s) ...",
+               this->uuid.c_str(), this->GetFullRealHost().c_str());
 
+       ConnectClass *found = NULL;
        if (!explicit_name.empty())
        {
-               for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
+               for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
                {
                        ConnectClass* c = *i;
 
                        if (explicit_name == c->name)
                        {
-                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Explicitly set to %s", explicit_name.c_str());
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Connect class explicitly set to %s",
+                                       explicit_name.c_str());
                                found = c;
                        }
                }
        }
        else
        {
-               for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
+               for (ServerConfig::ClassVector::const_iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); ++i)
                {
                        ConnectClass* c = *i;
-                       ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Checking %s", c->GetName().c_str());
+                       ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Checking the %s connect class ...",
+                                       c->GetName().c_str());
 
                        ModResult MOD_RESULT;
                        FIRST_MOD_RESULT(OnSetConnectClass, MOD_RESULT, (this,c));
                        if (MOD_RESULT == MOD_RES_DENY)
                                continue;
+
                        if (MOD_RESULT == MOD_RES_ALLOW)
                        {
-                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class forced by module to %s", c->GetName().c_str());
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class was explicitly chosen by a module",
+                                       c->GetName().c_str());
                                found = c;
                                break;
                        }
 
                        if (c->type == CC_NAMED)
+                       {
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as neither <connect:allow> nor <connect:deny> are set",
+                                               c->GetName().c_str());
                                continue;
+                       }
 
                        bool regdone = (registered != REG_NONE);
                        if (c->config->getBool("registered", regdone) != regdone)
+                       {
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as it requires that the user is %s",
+                                               c->GetName().c_str(), regdone ? "not fully connected" : "fully connected");
                                continue;
+                       }
 
                        /* check if host matches.. */
                        if (!InspIRCd::MatchCIDR(this->GetIPString(), c->GetHost(), NULL) &&
-                           !InspIRCd::MatchCIDR(this->host, c->GetHost(), NULL))
+                               !InspIRCd::MatchCIDR(this->GetRealHost(), c->GetHost(), NULL))
                        {
-                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "No host match (for %s)", c->GetHost().c_str());
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as neither the host (%s) nor the IP (%s) matches %s",
+                                       c->GetName().c_str(), this->GetRealHost().c_str(), this->GetIPString().c_str(), c->GetHost().c_str());
                                continue;
                        }
 
@@ -1182,31 +1174,29 @@ void LocalUser::SetClass(const std::string &explicit_name)
                         */
                        if (c->limit && (c->GetReferenceCount() >= c->limit))
                        {
-                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "OOPS: Connect class limit (%lu) hit, denying", c->limit);
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as it has reached its user limit (%lu)",
+                                               c->GetName().c_str(), c->limit);
                                continue;
                        }
 
-                       /* if it requires a port ... */
-                       int port = c->config->getInt("port");
-                       if (port)
+                       /* if it requires a port and our port doesn't match, fail */
+                       if (!c->ports.empty() && !c->ports.count(this->server_sa.port()))
                        {
-                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Requires port (%d)", port);
-
-                               /* and our port doesn't match, fail. */
-                               if (this->GetServerPort() != port)
-                                       continue;
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as the connection port (%d) is not any of %s",
+                                       c->GetName().c_str(), this->server_sa.port(), stdalgo::string::join(c->ports).c_str());
+                               continue;
                        }
 
-                       if (regdone && !c->config->getString("password").empty())
+                       if (regdone && !c->password.empty() && !ServerInstance->PassCompare(this, c->password, password, c->passwordhash))
                        {
-                               if (!ServerInstance->PassCompare(this, c->config->getString("password"), password, c->config->getString("hash")))
-                               {
-                                       ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Bad password, skipping");
-                                       continue;
-                               }
+                               ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as requires a password and %s",
+                                       c->GetName().c_str(), password.empty() ? "one was not provided" : "the provided password was incorrect");
+                               continue;
                        }
 
                        /* we stop at the first class that meets ALL critera. */
+                       ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is suitable for %s (%s)",
+                               c->GetName().c_str(), this->uuid.c_str(), this->GetFullRealHost().c_str());
                        found = c;
                        break;
                }
@@ -1224,46 +1214,91 @@ void LocalUser::SetClass(const std::string &explicit_name)
 void User::PurgeEmptyChannels()
 {
        // firstly decrement the count on each channel
-       for (UCListIter i = this->chans.begin(); i != this->chans.end(); )
+       for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); )
        {
                Channel* c = (*i)->chan;
                ++i;
                c->DelUser(this);
        }
+}
 
-       this->UnOper();
+void User::WriteNotice(const std::string& text)
+{
+       LocalUser* const localuser = IS_LOCAL(this);
+       if (!localuser)
+               return;
+
+       ClientProtocol::Messages::Privmsg msg(ClientProtocol::Messages::Privmsg::nocopy, ServerInstance->FakeClient, localuser, text, MSG_NOTICE);
+       localuser->Send(ServerInstance->GetRFCEvents().privmsg, msg);
 }
 
 const std::string& FakeUser::GetFullHost()
 {
-       if (!ServerInstance->Config->HideWhoisServer.empty())
-               return ServerInstance->Config->HideWhoisServer;
+       if (!ServerInstance->Config->HideServer.empty())
+               return ServerInstance->Config->HideServer;
        return server->GetName();
 }
 
 const std::string& FakeUser::GetFullRealHost()
 {
-       if (!ServerInstance->Config->HideWhoisServer.empty())
-               return ServerInstance->Config->HideWhoisServer;
+       if (!ServerInstance->Config->HideServer.empty())
+               return ServerInstance->Config->HideServer;
        return server->GetName();
 }
 
 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask)
-       : config(tag), type(t), fakelag(true), name("unnamed"), registration_timeout(0), host(mask),
-       pingtime(0), softsendqmax(0), hardsendqmax(0), recvqmax(0),
-       penaltythreshold(0), commandrate(0), maxlocal(0), maxglobal(0), maxconnwarn(true), maxchans(ServerInstance->Config->MaxChans),
-       limit(0), resolvehostnames(true)
+       : config(tag)
+       , type(t)
+       , fakelag(true)
+       , name("unnamed")
+       , registration_timeout(0)
+       , host(mask)
+       , pingtime(0)
+       , softsendqmax(0)
+       , hardsendqmax(0)
+       , recvqmax(0)
+       , penaltythreshold(0)
+       , commandrate(0)
+       , maxlocal(0)
+       , maxglobal(0)
+       , maxconnwarn(true)
+       , maxchans(0)
+       , limit(0)
+       , resolvehostnames(true)
 {
 }
 
 ConnectClass::ConnectClass(ConfigTag* tag, char t, const std::string& mask, const ConnectClass& parent)
-       : config(tag), type(t), fakelag(parent.fakelag), name("unnamed"),
-       registration_timeout(parent.registration_timeout), host(mask), pingtime(parent.pingtime),
-       softsendqmax(parent.softsendqmax), hardsendqmax(parent.hardsendqmax), recvqmax(parent.recvqmax),
-       penaltythreshold(parent.penaltythreshold), commandrate(parent.commandrate),
-       maxlocal(parent.maxlocal), maxglobal(parent.maxglobal), maxconnwarn(parent.maxconnwarn), maxchans(parent.maxchans),
-       limit(parent.limit), resolvehostnames(parent.resolvehostnames)
 {
+       Update(&parent);
+       name = "unnamed";
+       type = t;
+       host = mask;
+
+       // Connect classes can inherit from each other but this is problematic for modules which can't use
+       // ConnectClass::Update so we build a hybrid tag containing all of the values set on this class as
+       // well as the parent class.
+       ConfigItems* items = NULL;
+       config = ConfigTag::create(tag->tag, tag->src_name, tag->src_line, items);
+
+       const ConfigItems& parentkeys = parent.config->getItems();
+       for (ConfigItems::const_iterator piter = parentkeys.begin(); piter != parentkeys.end(); ++piter)
+       {
+               // The class name and parent name are not inherited
+               if (stdalgo::string::equalsci(piter->first, "name") || stdalgo::string::equalsci(piter->first, "parent"))
+                       continue;
+
+               // Store the item in the config tag. If this item also
+               // exists in the child it will be overwritten.
+               (*items)[piter->first] = piter->second;
+       }
+
+       const ConfigItems& childkeys = tag->getItems();
+       for (ConfigItems::const_iterator citer = childkeys.begin(); citer != childkeys.end(); ++citer)
+       {
+               // This will overwrite the parent value if present.
+               (*items)[citer->first] = citer->second;
+       }
 }
 
 void ConnectClass::Update(const ConnectClass* src)
@@ -1286,4 +1321,7 @@ void ConnectClass::Update(const ConnectClass* src)
        maxchans = src->maxchans;
        limit = src->limit;
        resolvehostnames = src->resolvehostnames;
+       ports = src->ports;
+       password = src->password;
+       passwordhash = src->passwordhash;
 }