X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_spanningtree%2Ftreesocket1.cpp;h=6703021a8f5f2b7d59b4d59e042ef3dbe0f97d92;hb=b200104cf2c61465acecaca111e3ec727fc3b954;hp=34b8e112d83f8f859fd4d5ec6b54ff1ff24fc76c;hpb=bfaf7e3b27981a5144faba6d17c6e29fac735dbb;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_spanningtree/treesocket1.cpp b/src/modules/m_spanningtree/treesocket1.cpp index 34b8e112d..370c38d2c 100644 --- a/src/modules/m_spanningtree/treesocket1.cpp +++ b/src/modules/m_spanningtree/treesocket1.cpp @@ -1,293 +1,210 @@ -/* +------------------------------------+ - * | 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) 2009-2010 Daniel De Graaf + * Copyright (C) 2007-2008 Robin Burchell + * Copyright (C) 2007 Craig Edwards + * Copyright (C) 2007 Dennis Friis * - * 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 "wildcard.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/timesynctimer.h 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 */ - - -/** Because most of the I/O gubbins are encapsulated within - * BufferedSocket, we just call the superclass constructor for - * most of the action, and append a few of our own values - * to it. +#include "inspircd.h" +#include "iohook.h" + +#include "main.h" +#include "modules/spanningtree.h" +#include "utils.h" +#include "treeserver.h" +#include "link.h" +#include "treesocket.h" +#include "commands.h" + +/** Constructor for outgoing connections. + * Because most of the I/O gubbins are encapsulated within + * BufferedSocket, we just call DoConnect() for most of the action, + * and only do minor initialization tasks ourselves. */ -TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string shost, int iport, bool listening, unsigned long maxtime, Module* HookMod) - : BufferedSocket(SI, shost, iport, listening, maxtime), Utils(Util), Hook(HookMod) +TreeSocket::TreeSocket(Link* link, Autoconnect* myac, const std::string& ipaddr) + : linkID(link->Name), LinkState(CONNECTING), MyRoot(NULL), proto_version(0) + , burstsent(false), age(ServerInstance->Time()) { - myhost = host; - this->LinkState = LISTENER; - theirchallenge.clear(); - ourchallenge.clear(); - if (listening && Hook) - BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); + capab = new CapabData; + capab->link = link; + capab->ac = myac; + capab->capab_phase = 0; + + DoConnect(ipaddr, link->Port, link->Timeout, link->Bind); + Utils->timeoutlist[this] = std::pair(linkID, link->Timeout); + SendCapabilities(1); } -TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string shost, int iport, bool listening, unsigned long maxtime, const std::string &ServerName, const std::string &bindto, Module* HookMod) - : BufferedSocket(SI, shost, iport, listening, maxtime, bindto), Utils(Util), Hook(HookMod) -{ - myhost = ServerName; - theirchallenge.clear(); - ourchallenge.clear(); - this->LinkState = CONNECTING; - if (Hook) - BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); -} - -/** When a listening socket gives us a new file descriptor, - * we must associate it with a socket without creating a new - * connection. This constructor is used for this purpose. +/** Constructor for incoming connections */ -TreeSocket::TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip, Module* HookMod) - : BufferedSocket(SI, newfd, ip), Utils(Util), Hook(HookMod) +TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) + : BufferedSocket(newfd) + , linkID("inbound from " + client->addr()), LinkState(WAIT_AUTH_1), MyRoot(NULL), proto_version(0) + , burstsent(false), age(ServerInstance->Time()) { - this->LinkState = WAIT_AUTH_1; - theirchallenge.clear(); - ourchallenge.clear(); - sentcapab = false; - /* If we have a transport module hooked to the parent, hook the same module to this - * socket, and set a timer waiting for handshake before we send CAPAB etc. - */ - if (Hook) - BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); + capab = new CapabData; + capab->capab_phase = 0; - Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(Utils->LinkBlocks[0]), this->Utils, 1)); + for (ListenSocket::IOHookProvList::iterator i = via->iohookprovs.begin(); i != via->iohookprovs.end(); ++i) + { + ListenSocket::IOHookProvRef& iohookprovref = *i; + if (!iohookprovref) + continue; + + iohookprovref->OnAccept(this, client, server); + // IOHook could have encountered a fatal error, e.g. if the TLS ClientHello was already in the queue and there was no common TLS version + if (!getError().empty()) + { + TreeSocket::OnError(I_ERR_OTHER); + return; + } + } + + SendCapabilities(1); + + Utils->timeoutlist[this] = std::pair(linkID, 30); } -ServerState TreeSocket::GetLinkState() +void TreeSocket::CleanNegotiationInfo() { - return this->LinkState; + // connect is good, reset the autoconnect block (if used) + if (capab->ac) + capab->ac->position = -1; + delete capab; + capab = NULL; } -Module* TreeSocket::GetHook() +CullResult TreeSocket::cull() { - return this->Hook; + Utils->timeoutlist.erase(this); + if (capab && capab->ac) + Utils->Creator->ConnectServer(capab->ac, false); + return this->BufferedSocket::cull(); } TreeSocket::~TreeSocket() { - if (Hook) - BufferedSocketUnhookRequest(this, (Module*)Utils->Creator, Hook).Send(); + delete capab; } /** When an outbound connection finishes connecting, we receive - * this event, and must send our SERVER string to the other + * this event, and must do CAPAB negotiation with the other * side. If the other side is happy, as outlined in the server * to server docs on the inspircd.org site, the other side - * will then send back its own server string. + * will then send back its own SERVER string eventually. */ -bool TreeSocket::OnConnected() +void TreeSocket::OnConnected() { if (this->LinkState == CONNECTING) { - /* we do not need to change state here. */ - for (std::vector::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++) + if (!capab->link->Hook.empty()) { - if (x->Name == this->myhost) + ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, capab->link->Hook); + if (!prov) { - Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] started.", myhost.c_str(), (x->HiddenFromStats ? "" : this->GetIP().c_str())); - if (Hook) - { - BufferedSocketHookRequest(this, (Module*)Utils->Creator, Hook).Send(); - Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2[%s] using transport \2%s\2", myhost.c_str(), (x->HiddenFromStats ? "" : this->GetIP().c_str()), - x->Hook.c_str()); - } - this->OutboundPass = x->SendPass; - sentcapab = false; - - /* found who we're supposed to be connecting to, send the neccessary gubbins. */ - if (this->GetHook()) - Instance->Timers->AddTimer(new HandshakeTimer(Instance, this, &(*x), this->Utils, 1)); - else - this->SendCapabilities(); - - return true; + SetError("Could not find hook '" + capab->link->Hook + "' for connection to " + linkID); + return; } + static_cast(prov)->OnConnect(this); } - } - /* There is a (remote) chance that between the /CONNECT and the connection - * being accepted, some muppet has removed the block and rehashed. - * If that happens the connection hangs here until it's closed. Unlikely - * and rather harmless. - */ - this->Utils->Creator->RemoteMessage(NULL,"Connection to \2%s\2 lost link tag(!)", myhost.c_str()); - return true; -} - -void TreeSocket::OnError(BufferedSocketError e) -{ - Link* MyLink; - if (this->LinkState == LISTENER) - return; - - switch (e) - { - case I_ERR_CONNECT: - Utils->Creator->RemoteMessage(NULL,"Connection failed: Connection to \002%s\002 refused", myhost.c_str()); - MyLink = Utils->FindLink(myhost); - if (MyLink) - Utils->DoFailOver(MyLink); - break; - case I_ERR_SOCKET: - Utils->Creator->RemoteMessage(NULL,"Connection failed: Could not create socket"); - break; - case I_ERR_BIND: - Utils->Creator->RemoteMessage(NULL,"Connection failed: Error binding socket to address or port"); - break; - case I_ERR_WRITE: - Utils->Creator->RemoteMessage(NULL,"Connection failed: I/O error on connection"); - break; - case I_ERR_NOMOREFDS: - Utils->Creator->RemoteMessage(NULL,"Connection failed: Operating system is out of file descriptors!"); - break; - default: - if ((errno) && (errno != EINPROGRESS) && (errno != EAGAIN)) - Utils->Creator->RemoteMessage(NULL,"Connection to \002%s\002 failed with OS error: %s", myhost.c_str(), strerror(errno)); - break; + ServerInstance->SNO->WriteGlobalSno('l', "Connection to \2%s\2[%s] started.", linkID.c_str(), + (capab->link->HiddenFromStats ? "" : capab->link->IPAddr.c_str())); + this->SendCapabilities(1); } } -int TreeSocket::OnDisconnect() +void TreeSocket::OnError(BufferedSocketError e) { - /* For the same reason as above, we don't - * handle OnDisconnect() - */ - return true; + ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed with error: %s", + linkID.c_str(), getError().c_str()); + LinkState = DYING; + Close(); } void TreeSocket::SendError(const std::string &errormessage) { - /* Display the error locally as well as sending it remotely */ - Utils->Creator->RemoteMessage(NULL, "Sent \2ERROR\2 to %s: %s", (this->InboundServerName.empty() ? "" : this->InboundServerName.c_str()), errormessage.c_str()); - this->WriteLine("ERROR :"+errormessage); - /* One last attempt to make sure the error reaches its target */ - this->FlushWriteBuffer(); + WriteLine("ERROR :"+errormessage); + DoWrite(); + LinkState = DYING; + SetError(errormessage); } -/** This function forces this server to quit, removing this server - * and any users on it (and servers and users below that, etc etc). - * It's very slow and pretty clunky, but luckily unless your network - * is having a REAL bad hair day, this function shouldnt be called - * too many times a month ;-) - */ -void TreeSocket::SquitServer(std::string &from, TreeServer* Current) +CmdResult CommandSQuit::HandleServer(TreeServer* server, std::vector& params) { - /* recursively squit the servers attached to 'Current'. - * We're going backwards so we don't remove users - * while we still need them ;) - */ - for (unsigned int q = 0; q < Current->ChildCount(); q++) + TreeServer* quitting = Utils->FindServer(params[0]); + if (!quitting) { - TreeServer* recursive_server = Current->GetChild(q); - this->SquitServer(from,recursive_server); + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Squit from unknown server"); + return CMD_FAILURE; } - /* Now we've whacked the kids, whack self */ - num_lost_servers++; - num_lost_users += Current->QuitUsers(from); -} -/** This is a wrapper function for SquitServer above, which - * does some validation first and passes on the SQUIT to all - * other remaining servers. - */ -void TreeSocket::Squit(TreeServer* Current, const std::string &reason) -{ - if ((Current) && (Current != Utils->TreeRoot)) + CmdResult ret = CMD_SUCCESS; + if (quitting == server) { - Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server"); - rmode.Send(Instance); - - std::deque params; - params.push_back(Current->GetName()); - params.push_back(":"+reason); - Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName()); - if (Current->GetParent() == Utils->TreeRoot) - { - this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split: "+reason); - } - else - { - this->Instance->SNO->WriteToSnoMask('l',"Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason); - } - num_lost_servers = 0; - num_lost_users = 0; - std::string from = Current->GetParent()->GetName()+" "+Current->GetName(); - SquitServer(from, Current); - Current->Tidy(); - Current->GetParent()->DelChild(Current); - delete Current; - this->Instance->SNO->WriteToSnoMask('l',"Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers); + ret = CMD_FAILURE; + server = server->GetParent(); } - else - Instance->Log(DEFAULT,"Squit from unknown server"); + else if (quitting->GetParent() != server) + throw ProtocolException("Attempted to SQUIT a non-directly connected server or the parent"); + + server->SQuitChild(quitting, params[1]); + + // XXX: Return CMD_FAILURE when servers SQUIT themselves (i.e. :00S SQUIT 00S :Shutting down) + // to stop this message from being forwarded. + // The squit logic generates a SQUIT message with our sid as the source and sends it to the + // remaining servers. + return ret; } /** This function is called when we receive data from a remote - * server. We buffer the data in a std::string (it doesnt stay - * there for long), reading using BufferedSocket::Read() which can - * read up to 16 kilobytes in one operation. - * - * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES - * THE SOCKET OBJECT FOR US. + * server. */ -bool TreeSocket::OnDataReady() +void TreeSocket::OnDataReady() { - const char* data = this->Read(); - /* Check that the data read is a valid pointer and it has some content */ - if (data && *data) + Utils->Creator->loopCall = true; + std::string line; + while (GetNextLine(line)) { - this->in_buffer.append(data); - /* While there is at least one new line in the buffer, - * do something useful (we hope!) with it. - */ - while (in_buffer.find("\n") != std::string::npos) + std::string::size_type rline = line.find('\r'); + if (rline != std::string::npos) + line.erase(rline); + if (line.find('\0') != std::string::npos) { - std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1); - in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n")); - /* Use rfind here not find, as theres more - * chance of the \r being near the end of the - * string, not the start. - */ - if (ret.find("\r") != std::string::npos) - ret = in_buffer.substr(0,in_buffer.find("\r")-1); - /* Process this one, abort if it - * didnt return true. - */ - if (!this->ProcessLine(ret)) - { - return false; - } + SendError("Read null character from socket"); + break; } - return true; + + try + { + ProcessLine(line); + } + catch (CoreException& ex) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error while processing: " + line); + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason()); + SendError(ex.GetReason() + " - check the log file for details"); + } + + if (!getError().empty()) + break; } - /* EAGAIN returns an empty but non-NULL string, so this - * evaluates to TRUE for EAGAIN but to FALSE for EOF. - */ - return (data && !*data); + if (LinkState != CONNECTED && recvq.length() > 4096) + SendError("RecvQ overrun (line too long)"); + Utils->Creator->loopCall = false; }