2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2013, 2017-2019 Sadie Powell <sadie@witchery.services>
5 * Copyright (C) 2012-2016 Attila Molnar <attilamolnar@hush.com>
6 * Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
7 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
8 * Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
9 * Copyright (C) 2007-2008, 2010 Craig Edwards <brain@inspircd.org>
10 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
11 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
13 * This file is part of InspIRCd. InspIRCd is free software: you can
14 * redistribute it and/or modify it under the terms of the GNU General Public
15 * License as published by the Free Software Foundation, version 2.
17 * This program is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
19 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program. If not, see <http://www.gnu.org/licenses/>.
32 #include "treeserver.h"
34 #include "treesocket.h"
37 /** Constructor for outgoing connections.
38 * Because most of the I/O gubbins are encapsulated within
39 * BufferedSocket, we just call DoConnect() for most of the action,
40 * and only do minor initialization tasks ourselves.
42 TreeSocket::TreeSocket(Link* link, Autoconnect* myac, const irc::sockets::sockaddrs& dest)
43 : linkID(link->Name), LinkState(CONNECTING), MyRoot(NULL), proto_version(0)
44 , burstsent(false), age(ServerInstance->Time())
46 capab = new CapabData;
49 capab->capab_phase = 0;
51 irc::sockets::sockaddrs bind;
52 memset(&bind, 0, sizeof(bind));
53 if (!link->Bind.empty() && (dest.family() == AF_INET || dest.family() == AF_INET6))
55 if (!irc::sockets::aptosa(link->Bind, 0, bind))
58 SetError("Bind address '" + link->Bind + "' is not a valid IPv4 or IPv6 address");
59 TreeSocket::OnError(I_ERR_BIND);
62 else if (bind.family() != dest.family())
65 SetError("Bind address '" + bind.addr() + "' is not the same address family as destination address '" + dest.addr() + "'");
66 TreeSocket::OnError(I_ERR_BIND);
71 DoConnect(dest, bind, link->Timeout);
72 Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, link->Timeout);
76 /** Constructor for incoming connections
78 TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
79 : BufferedSocket(newfd)
80 , linkID("inbound from " + client->addr()), LinkState(WAIT_AUTH_1), MyRoot(NULL), proto_version(0)
81 , burstsent(false), age(ServerInstance->Time())
83 capab = new CapabData;
84 capab->capab_phase = 0;
86 for (ListenSocket::IOHookProvList::iterator i = via->iohookprovs.begin(); i != via->iohookprovs.end(); ++i)
88 ListenSocket::IOHookProvRef& iohookprovref = *i;
92 iohookprovref->OnAccept(this, client, server);
93 // 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
94 if (!getError().empty())
96 TreeSocket::OnError(I_ERR_OTHER);
103 Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, 30);
106 void TreeSocket::CleanNegotiationInfo()
108 // connect is good, reset the autoconnect block (if used)
110 capab->ac->position = -1;
115 CullResult TreeSocket::cull()
117 Utils->timeoutlist.erase(this);
118 if (capab && capab->ac)
119 Utils->Creator->ConnectServer(capab->ac, false);
120 return this->BufferedSocket::cull();
123 TreeSocket::~TreeSocket()
128 /** When an outbound connection finishes connecting, we receive
129 * this event, and must do CAPAB negotiation with the other
130 * side. If the other side is happy, as outlined in the server
131 * to server docs on the inspircd.org site, the other side
132 * will then send back its own SERVER string eventually.
134 void TreeSocket::OnConnected()
136 if (this->LinkState == CONNECTING)
138 if (!capab->link->Hook.empty())
140 ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, capab->link->Hook);
143 SetError("Could not find hook '" + capab->link->Hook + "' for connection to " + linkID);
146 static_cast<IOHookProvider*>(prov)->OnConnect(this);
149 ServerInstance->SNO->WriteGlobalSno('l', "Connection to \002%s\002[%s] started.", linkID.c_str(),
150 (capab->link->HiddenFromStats ? "<hidden>" : capab->link->IPAddr.c_str()));
151 this->SendCapabilities(1);
155 void TreeSocket::OnError(BufferedSocketError e)
157 ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed with error: %s",
158 linkID.c_str(), getError().c_str());
163 void TreeSocket::SendError(const std::string &errormessage)
165 WriteLine("ERROR :"+errormessage);
168 SetError(errormessage);
171 CmdResult CommandSQuit::HandleServer(TreeServer* server, CommandBase::Params& params)
173 TreeServer* quitting = Utils->FindServer(params[0]);
176 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Squit from unknown server");
180 CmdResult ret = CMD_SUCCESS;
181 if (quitting == server)
184 server = server->GetParent();
186 else if (quitting->GetParent() != server)
187 throw ProtocolException("Attempted to SQUIT a non-directly connected server or the parent");
189 server->SQuitChild(quitting, params[1]);
191 // XXX: Return CMD_FAILURE when servers SQUIT themselves (i.e. :00S SQUIT 00S :Shutting down)
192 // to stop this message from being forwarded.
193 // The squit logic generates a SQUIT message with our sid as the source and sends it to the
194 // remaining servers.
198 /** This function is called when we receive data from a remote
201 void TreeSocket::OnDataReady()
203 Utils->Creator->loopCall = true;
205 while (GetNextLine(line))
207 std::string::size_type rline = line.find('\r');
208 if (rline != std::string::npos)
210 if (line.find('\0') != std::string::npos)
212 SendError("Read null character from socket");
220 catch (CoreException& ex)
222 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error while processing: " + line);
223 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason());
224 SendError(ex.GetReason() + " - check the log file for details");
227 if (!getError().empty())
230 if (LinkState != CONNECTED && recvq.length() > 4096)
231 SendError("RecvQ overrun (line too long)");
232 Utils->Creator->loopCall = false;