2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2013, 2017-2020 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)
44 , LinkState(CONNECTING)
48 , age(ServerInstance->Time())
50 capab = new CapabData;
53 capab->capab_phase = 0;
54 capab->remotesa = dest;
56 irc::sockets::sockaddrs bind;
57 memset(&bind, 0, sizeof(bind));
58 if (!link->Bind.empty() && (dest.family() == AF_INET || dest.family() == AF_INET6))
60 if (!irc::sockets::aptosa(link->Bind, 0, bind))
63 SetError("Bind address '" + link->Bind + "' is not a valid IPv4 or IPv6 address");
64 TreeSocket::OnError(I_ERR_BIND);
67 else if (bind.family() != dest.family())
70 SetError("Bind address '" + bind.addr() + "' is not the same address family as destination address '" + dest.addr() + "'");
71 TreeSocket::OnError(I_ERR_BIND);
76 DoConnect(dest, bind, link->Timeout);
77 Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, link->Timeout);
81 /** Constructor for incoming connections
83 TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
84 : BufferedSocket(newfd)
85 , linkID("inbound from " + client->addr())
86 , LinkState(WAIT_AUTH_1)
90 , age(ServerInstance->Time())
92 capab = new CapabData;
93 capab->capab_phase = 0;
94 capab->remotesa = *client;
96 for (ListenSocket::IOHookProvList::iterator i = via->iohookprovs.begin(); i != via->iohookprovs.end(); ++i)
98 ListenSocket::IOHookProvRef& iohookprovref = *i;
102 iohookprovref->OnAccept(this, client, server);
103 // 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
104 if (!getError().empty())
106 TreeSocket::OnError(I_ERR_OTHER);
113 Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, 30);
116 void TreeSocket::CleanNegotiationInfo()
118 // connect is good, reset the autoconnect block (if used)
120 capab->ac->position = -1;
125 CullResult TreeSocket::cull()
127 Utils->timeoutlist.erase(this);
128 if (capab && capab->ac)
129 Utils->Creator->ConnectServer(capab->ac, false);
130 return this->BufferedSocket::cull();
133 TreeSocket::~TreeSocket()
138 /** When an outbound connection finishes connecting, we receive
139 * this event, and must do CAPAB negotiation with the other
140 * side. If the other side is happy, as outlined in the server
141 * to server docs on the inspircd.org site, the other side
142 * will then send back its own SERVER string eventually.
144 void TreeSocket::OnConnected()
146 if (this->LinkState == CONNECTING)
148 if (!capab->link->Hook.empty())
150 ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, capab->link->Hook);
153 SetError("Could not find hook '" + capab->link->Hook + "' for connection to " + linkID);
156 static_cast<IOHookProvider*>(prov)->OnConnect(this);
159 ServerInstance->SNO->WriteGlobalSno('l', "Connection to \002%s\002[%s] started.", linkID.c_str(),
160 (capab->link->HiddenFromStats ? "<hidden>" : capab->link->IPAddr.c_str()));
161 this->SendCapabilities(1);
165 void TreeSocket::OnError(BufferedSocketError e)
167 ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed with error: %s",
168 linkID.c_str(), getError().c_str());
173 void TreeSocket::SendError(const std::string &errormessage)
175 WriteLine("ERROR :"+errormessage);
178 SetError(errormessage);
181 CmdResult CommandSQuit::HandleServer(TreeServer* server, CommandBase::Params& params)
183 TreeServer* quitting = Utils->FindServer(params[0]);
186 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Squit from unknown server");
190 CmdResult ret = CMD_SUCCESS;
191 if (quitting == server)
194 server = server->GetParent();
196 else if (quitting->GetParent() != server)
197 throw ProtocolException("Attempted to SQUIT a non-directly connected server or the parent");
199 server->SQuitChild(quitting, params[1]);
201 // XXX: Return CMD_FAILURE when servers SQUIT themselves (i.e. :00S SQUIT 00S :Shutting down)
202 // to stop this message from being forwarded.
203 // The squit logic generates a SQUIT message with our sid as the source and sends it to the
204 // remaining servers.
208 /** This function is called when we receive data from a remote
211 void TreeSocket::OnDataReady()
213 Utils->Creator->loopCall = true;
215 while (GetNextLine(line))
217 std::string::size_type rline = line.find('\r');
218 if (rline != std::string::npos)
220 if (line.find('\0') != std::string::npos)
222 SendError("Read null character from socket");
230 catch (CoreException& ex)
232 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error while processing: " + line);
233 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason());
234 SendError(ex.GetReason() + " - check the log file for details");
237 if (!getError().empty())
240 if (LinkState != CONNECTED && recvq.length() > 4096)
241 SendError("RecvQ overrun (line too long)");
242 Utils->Creator->loopCall = false;