X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_spanningtree%2Fuid.cpp;h=72361af382377ba9cea33357f7dd83b47b9a1fb2;hb=a6433b37967e22e19658967ae4e798febea86356;hp=0c456471935ab10593ca60ad738f4068f4816b50;hpb=1609ed5d3a53781586543893bace5a4eb612d8b5;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_spanningtree/uid.cpp b/src/modules/m_spanningtree/uid.cpp index 0c4564719..72361af38 100644 --- a/src/modules/m_spanningtree/uid.cpp +++ b/src/modules/m_spanningtree/uid.cpp @@ -1,157 +1,172 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2008 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * Copyright (C) 2010 Daniel De Graaf + * Copyright (C) 2008 Robin Burchell + * Copyright (C) 2008 Craig Edwards * - * This program is free but copyrighted software; see - * the file COPYING for details. + * 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 + * License as published by the Free Software Foundation, version 2. * - * --------------------------------------------------- + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . */ + #include "inspircd.h" -#include "commands/cmd_whois.h" -#include "commands/cmd_stats.h" -#include "socket.h" -#include "xline.h" -#include "transport.h" -#include "m_hash.h" -#include "socketengine.h" - -#include "m_spanningtree/main.h" -#include "m_spanningtree/utils.h" -#include "m_spanningtree/treeserver.h" -#include "m_spanningtree/link.h" -#include "m_spanningtree/treesocket.h" -#include "m_spanningtree/resolvers.h" -#include "m_spanningtree/handshaketimer.h" - -/* $ModDep: m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_hash.h m_spanningtree/handshaketimer.h */ - -bool TreeSocket::ParseUID(const std::string &source, std::deque ¶ms) +#include "commands.h" + +#include "utils.h" +#include "treeserver.h" + +CmdResult CommandUID::HandleServer(TreeServer* remoteserver, std::vector& params) { - /** Do we have enough parameters: - * 1 2 3 4 5 6 7 8 9 10 - * UID uuid age nick host dhost ident +modestr +snomasks ip.string signon :gecos + /** + * 0 1 2 3 4 5 6 7 8 9 (n-1) + * UID uuid age nick host dhost ident ip.string signon +modes (modepara) :gecos */ - if (params.size() != 11) - { - if (!params.empty()) - this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction ("+params[0]+" with only "+ - ConvToStr(params.size())+" of 10 parameters?)"); - return true; - } - - time_t age_t = ConvToInt(params[1]); - time_t signon = ConvToInt(params[9]); + time_t age_t = ServerCommand::ExtractTS(params[1]); + time_t signon = ServerCommand::ExtractTS(params[7]); std::string empty; - - TreeServer* remoteserver = Utils->FindServer(source); - - if (!remoteserver) + const std::string& modestr = params[8]; + + // Check if the length of the uuid is correct and confirm the sid portion of the uuid matches the sid of the server introducing the user + if (params[0].length() != UIDGenerator::UUID_LENGTH || params[0].compare(0, 3, remoteserver->GetID())) + throw ProtocolException("Bogus UUID"); + // Sanity check on mode string: must begin with '+' + if (modestr[0] != '+') + throw ProtocolException("Invalid mode string"); + + // See if there is a nick collision + User* collideswith = ServerInstance->FindNickOnly(params[2]); + if ((collideswith) && (collideswith->registered != REG_ALL)) { - this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Unknown server "+source+")"); - return true; + // User that the incoming user is colliding with is not fully registered, we force nick change the + // unregistered user to their uuid and tell them what happened + collideswith->WriteFrom(collideswith, "NICK %s", collideswith->uuid.c_str()); + collideswith->WriteNumeric(ERR_NICKNAMEINUSE, "%s :Nickname overruled.", collideswith->nick.c_str()); + + // Clear the bit before calling User::ChangeNick() to make it NOT run the OnUserPostNick() hook + collideswith->registered &= ~REG_NICK; + collideswith->ChangeNick(collideswith->uuid); } - - /* Check parameters for validity before introducing the client, discovered by dmb */ - if (!age_t) - { - this->WriteLine(std::string(":")+this->Instance->Config->GetSID()+" KILL "+params[0]+" :Invalid client introduction (Invalid TS?)"); - return true; - } - - /* check for collision */ - user_hash::iterator iter = this->Instance->Users->clientlist->find(params[2]); - - if (iter != this->Instance->Users->clientlist->end()) + else if (collideswith) { - /* - * Nick collision. - */ - Instance->Logs->Log("m_spanningtree",DEBUG,"*** Collision on %s", params[2].c_str()); - int collide = this->DoCollision(iter->second, age_t, params[5], params[8], params[0]); + // The user on this side is registered, handle the collision + bool they_change = Utils->DoCollision(collideswith, remoteserver, age_t, params[5], params[6], params[0]); + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Collision on %s %d", params[2].c_str(), they_change); - if (collide == 2) + if (they_change) { - /* remote client changed, make sure we change their nick for the hash too */ + // The client being introduced needs to change nick to uuid, change the nick in the message before + // processing/forwarding it. Also change the nick TS to CommandSave::SavedTimestamp. + age_t = CommandSave::SavedTimestamp; + params[1] = ConvToStr(CommandSave::SavedTimestamp); params[2] = params[0]; } } - /* IMPORTANT NOTE: For remote users, we pass the UUID in the constructor. This automatically - * sets it up in the UUID hash for us. + /* For remote users, we pass the UUID they sent to the constructor. + * If the UUID already exists User::User() throws an exception which causes this connection to be closed. */ - User* _new = NULL; - try - { - _new = new User(this->Instance, params[0]); - } - catch (...) - { - SendError("Protocol violation - Duplicate UUID '" + params[0] + "' on introduction of new user"); - return false; - } - (*(this->Instance->Users->clientlist))[params[2]] = _new; - _new->SetFd(FD_MAGIC_NUMBER); - _new->nick.assign(params[2], 0, MAXBUF); - _new->host.assign(params[3], 0, 64); - _new->dhost.assign(params[4], 0, 64); - _new->server = this->Instance->FindServerNamePtr(remoteserver->GetName().c_str()); - _new->ident.assign(params[5], 0, MAXBUF); - _new->fullname.assign(params[10], 0, MAXBUF); + RemoteUser* _new = new RemoteUser(params[0], remoteserver); + ServerInstance->Users->clientlist[params[2]] = _new; + _new->nick = params[2]; + _new->host = params[3]; + _new->dhost = params[4]; + _new->ident = params[5]; + _new->fullname = params.back(); _new->registered = REG_ALL; _new->signon = signon; _new->age = age_t; - /* we need to remove the + from the modestring, so we can do our stuff */ - std::string::size_type pos_after_plus = params[6].find_first_not_of('+'); - if (pos_after_plus != std::string::npos) - params[6] = params[6].substr(pos_after_plus); + unsigned int paramptr = 9; - for (std::string::iterator v = params[6].begin(); v != params[6].end(); v++) + for (std::string::const_iterator v = modestr.begin(); v != modestr.end(); ++v) { - /* For each mode thats set, increase counter */ - ModeHandler* mh = Instance->Modes->FindMode(*v, MODETYPE_USER); + // Accept more '+' chars, for now + if (*v == '+') + continue; + + /* For each mode thats set, find the mode handler and set it on the new user */ + ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER); + if (!mh) + throw ProtocolException("Unrecognised mode '" + std::string(1, *v) + "'"); - if (mh) + if (mh->GetNumParams(true)) { - mh->OnModeChange(_new, _new, NULL, empty, true); - _new->SetMode(*v, true); - mh->ChangeCount(1); + if (paramptr >= params.size() - 1) + throw ProtocolException("Out of parameters while processing modes"); + std::string mp = params[paramptr++]; + /* IMPORTANT NOTE: + * All modes are assumed to succeed here as they are being set by a remote server. + * Modes CANNOT FAIL here. If they DO fail, then the failure is ignored. This is important + * to note as all but one modules currently cannot ever fail in this situation, except for + * m_servprotect which specifically works this way to prevent the mode being set ANYWHERE + * but here, at client introduction. You may safely assume this behaviour is standard and + * will not change in future versions if you want to make use of this protective behaviour + * yourself. + */ + mh->OnModeChange(_new, _new, NULL, mp, true); } + else + mh->OnModeChange(_new, _new, NULL, empty, true); + _new->SetMode(mh, true); } - _new->ProcessNoticeMasks(params[7].c_str()); + _new->SetClientIP(params[6].c_str()); - /* now we've done with modes processing, put the + back for remote servers */ - params[6] = "+" + params[6]; - -#ifdef SUPPORT_IP6LINKS - if (params[8].find_first_of(":") != std::string::npos) - _new->SetSockAddr(AF_INET6, params[8].c_str(), 0); - else -#endif - _new->SetSockAddr(AF_INET, params[8].c_str(), 0); - - Instance->Users->AddGlobalClone(_new); + ServerInstance->Users->AddClone(_new); + remoteserver->UserCount++; bool dosend = true; - if ((this->Utils->quiet_bursts && remoteserver->bursting) || this->Instance->SilentULine(_new->server)) + if ((Utils->quiet_bursts && remoteserver->IsBehindBursting()) || _new->server->IsSilentULine()) dosend = false; if (dosend) - this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s] [%s]", _new->server, _new->nick.c_str(), _new->ident.c_str(), _new->host.c_str(), _new->GetIPString(), _new->fullname.c_str()); + ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s (%s) [%s]", remoteserver->GetName().c_str(), _new->GetFullRealHost().c_str(), _new->GetIPString().c_str(), _new->fullname.c_str()); + + FOREACH_MOD(OnPostConnect, (_new)); + + return CMD_SUCCESS; +} - params[10] = ":" + params[10]; - Utils->DoOneToAllButSender(source, "UID", params, source); +CmdResult CommandFHost::HandleRemote(RemoteUser* src, std::vector& params) +{ + src->ChangeDisplayedHost(params[0]); + return CMD_SUCCESS; +} - Instance->PI->Introduce(_new); - FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new)); +CmdResult CommandFIdent::HandleRemote(RemoteUser* src, std::vector& params) +{ + src->ChangeIdent(params[0]); + return CMD_SUCCESS; +} - return true; +CmdResult CommandFName::HandleRemote(RemoteUser* src, std::vector& params) +{ + src->ChangeName(params[0]); + return CMD_SUCCESS; } +CommandUID::Builder::Builder(User* user) + : CmdBuilder(TreeServer::Get(user)->GetID(), "UID") +{ + push(user->uuid); + push_int(user->age); + push(user->nick); + push(user->host); + push(user->dhost); + push(user->ident); + push(user->GetIPString()); + push_int(user->signon); + push('+').push_raw(user->FormatModes(true)); + push_last(user->fullname); +}