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) 2007-2008, 2010 Craig Edwards <brain@inspircd.org>
9 * Copyright (C) 2007-2008 Dennis Friis <peavey@inspircd.org>
10 * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
12 * This file is part of InspIRCd. InspIRCd is free software: you can
13 * redistribute it and/or modify it under the terms of the GNU General Public
14 * License as published by the Free Software Foundation, version 2.
16 * This program is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
31 #include "treeserver.h"
33 #include "treesocket.h"
36 /** Constructor for outgoing connections.
37 * Because most of the I/O gubbins are encapsulated within
38 * BufferedSocket, we just call DoConnect() for most of the action,
39 * and only do minor initialization tasks ourselves.
41 TreeSocket::TreeSocket(Link* link, Autoconnect* myac, const irc::sockets::sockaddrs& dest)
43 , LinkState(CONNECTING)
47 , age(ServerInstance->Time())
49 capab = new CapabData;
52 capab->capab_phase = 0;
53 capab->remotesa = dest;
55 irc::sockets::sockaddrs bind;
56 memset(&bind, 0, sizeof(bind));
57 if (!link->Bind.empty() && (dest.family() == AF_INET || dest.family() == AF_INET6))
59 if (!irc::sockets::aptosa(link->Bind, 0, bind))
62 SetError("Bind address '" + link->Bind + "' is not a valid IPv4 or IPv6 address");
63 TreeSocket::OnError(I_ERR_BIND);
66 else if (bind.family() != dest.family())
69 SetError("Bind address '" + bind.addr() + "' is not the same address family as destination address '" + dest.addr() + "'");
70 TreeSocket::OnError(I_ERR_BIND);
75 DoConnect(dest, bind, link->Timeout);
76 Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, link->Timeout);
80 /** Constructor for incoming connections
82 TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
83 : BufferedSocket(newfd)
84 , linkID("inbound from " + client->addr())
85 , LinkState(WAIT_AUTH_1)
89 , age(ServerInstance->Time())
91 capab = new CapabData;
92 capab->capab_phase = 0;
93 capab->remotesa = *client;
95 for (ListenSocket::IOHookProvList::iterator i = via->iohookprovs.begin(); i != via->iohookprovs.end(); ++i)
97 ListenSocket::IOHookProvRef& iohookprovref = *i;
101 iohookprovref->OnAccept(this, client, server);
102 // 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
103 if (!getError().empty())
105 TreeSocket::OnError(I_ERR_OTHER);
112 Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, 30);
115 void TreeSocket::CleanNegotiationInfo()
117 // connect is good, reset the autoconnect block (if used)
119 capab->ac->position = -1;
124 CullResult TreeSocket::cull()
126 Utils->timeoutlist.erase(this);
127 if (capab && capab->ac)
128 Utils->Creator->ConnectServer(capab->ac, false);
129 return this->BufferedSocket::cull();
132 TreeSocket::~TreeSocket()
137 /** When an outbound connection finishes connecting, we receive
138 * this event, and must do CAPAB negotiation with the other
139 * side. If the other side is happy, as outlined in the server
140 * to server docs on the inspircd.org site, the other side
141 * will then send back its own SERVER string eventually.
143 void TreeSocket::OnConnected()
145 if (this->LinkState == CONNECTING)
147 if (!capab->link->Hook.empty())
149 ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, "ssl/" + capab->link->Hook);
152 SetError("Could not find hook '" + capab->link->Hook + "' for connection to " + linkID);
155 static_cast<IOHookProvider*>(prov)->OnConnect(this);
158 ServerInstance->SNO->WriteGlobalSno('l', "Connection to \002%s\002[%s] started.", linkID.c_str(),
159 (capab->link->HiddenFromStats ? "<hidden>" : capab->link->IPAddr.c_str()));
160 this->SendCapabilities(1);
164 void TreeSocket::OnError(BufferedSocketError e)
166 ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed with error: %s",
167 linkID.c_str(), getError().c_str());
172 void TreeSocket::SendError(const std::string &errormessage)
174 WriteLine("ERROR :"+errormessage);
177 SetError(errormessage);
180 CmdResult CommandSQuit::HandleServer(TreeServer* server, CommandBase::Params& params)
182 TreeServer* quitting = Utils->FindServer(params[0]);
185 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Squit from unknown server");
189 CmdResult ret = CMD_SUCCESS;
190 if (quitting == server)
193 server = server->GetParent();
195 else if (quitting->GetParent() != server)
196 throw ProtocolException("Attempted to SQUIT a non-directly connected server or the parent");
198 server->SQuitChild(quitting, params[1]);
200 // XXX: Return CMD_FAILURE when servers SQUIT themselves (i.e. :00S SQUIT 00S :Shutting down)
201 // to stop this message from being forwarded.
202 // The squit logic generates a SQUIT message with our sid as the source and sends it to the
203 // remaining servers.
207 /** This function is called when we receive data from a remote
210 void TreeSocket::OnDataReady()
212 Utils->Creator->loopCall = true;
214 while (GetNextLine(line))
216 std::string::size_type rline = line.find('\r');
217 if (rline != std::string::npos)
219 if (line.find('\0') != std::string::npos)
221 SendError("Read null character from socket");
229 catch (CoreException& ex)
231 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error while processing: " + line);
232 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason());
233 SendError(ex.GetReason() + " - check the log file for details");
236 if (!getError().empty())
239 if (LinkState != CONNECTED && recvq.length() > 4096)
240 SendError("RecvQ overrun (line too long)");
241 Utils->Creator->loopCall = false;