/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2010 Daniel De Graaf * Copyright (C) 2008 Robin Burchell * Copyright (C) 2008 Craig Edwards * * 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.h" #include "utils.h" #include "link.h" #include "treesocket.h" #include "treeserver.h" #include "resolvers.h" CmdResult CommandUID::Handle(const parameterlist ¶ms, User* serversrc) { SpanningTreeUtilities* Utils = ((ModuleSpanningTree*)(Module*)creator)->Utils; /** Do we have enough parameters: * 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 */ time_t age_t = ConvToInt(params[1]); time_t signon = ConvToInt(params[7]); std::string empty; std::string modestr(params[8]); TreeServer* remoteserver = Utils->FindServer(serversrc->server); if (!remoteserver) return CMD_INVALID; /* Is this a valid UID, and not misrouted? */ if (params[0].length() != 9 || params[0].substr(0,3) != serversrc->uuid) return CMD_INVALID; /* Check parameters for validity before introducing the client, discovered by dmb */ if (!age_t) return CMD_INVALID; if (!signon) return CMD_INVALID; if (modestr[0] != '+') return CMD_INVALID; TreeSocket* sock = remoteserver->GetRoute()->GetSocket(); /* check for collision */ User* const collideswith = ServerInstance->FindNickOnly(params[2]); if ((collideswith) && (collideswith->registered != REG_ALL)) { // 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(433, "%s %s :Nickname overruled.", collideswith->nick.c_str(), 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, true); } else if (collideswith) { /* * Nick collision. */ int collide = sock->DoCollision(collideswith, age_t, params[5], params[6], params[0]); ServerInstance->Logs->Log("m_spanningtree",DEBUG,"*** Collision on %s, collide=%d", params[2].c_str(), collide); if (collide != 1) { /* remote client lost, make sure we change their nick for the hash too * * This alters the line that will be sent to other servers, which * commands normally shouldn't do; hence the required const_cast. */ const_cast(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. */ User* _new = NULL; try { _new = new RemoteUser(params[0], remoteserver->GetName()); } catch (...) { ServerInstance->Logs->Log("m_spanningtree", DEFAULT, "Duplicate UUID %s in client introduction", params[0].c_str()); return CMD_INVALID; } (*(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[params.size() - 1]; _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 = modestr.find_first_not_of('+'); if (pos_after_plus != std::string::npos) modestr = modestr.substr(pos_after_plus); unsigned int paramptr = 9; for (std::string::iterator v = modestr.begin(); v != modestr.end(); v++) { /* For each mode thats set, increase counter */ ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER); if (mh) { if (mh->GetNumParams(true)) { if (paramptr >= params.size() - 1) return CMD_INVALID; 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(*v, true); } } /* now we've done with modes processing, put the + back for remote servers */ if (modestr[0] != '+') modestr = "+" + modestr; _new->SetClientIP(params[6].c_str()); ServerInstance->Users->AddGlobalClone(_new); remoteserver->SetUserCount(1); // increment by 1 bool dosend = true; if ((Utils->quiet_bursts && remoteserver->bursting) || ServerInstance->SilentULine(_new->server)) dosend = false; if (dosend) ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s (%s) [%s]", _new->server.c_str(), _new->GetFullRealHost().c_str(), _new->GetIPString(), _new->fullname.c_str()); FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new)); return CMD_SUCCESS; } CmdResult CommandFHost::Handle(const parameterlist ¶ms, User* src) { if (IS_SERVER(src)) return CMD_FAILURE; src->ChangeDisplayedHost(params[0].c_str()); return CMD_SUCCESS; } CmdResult CommandFIdent::Handle(const parameterlist ¶ms, User* src) { if (IS_SERVER(src)) return CMD_FAILURE; src->ChangeIdent(params[0].c_str()); return CMD_SUCCESS; } CmdResult CommandFName::Handle(const parameterlist ¶ms, User* src) { if (IS_SERVER(src)) return CMD_FAILURE; src->ChangeName(params[0].c_str()); return CMD_SUCCESS; }