2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
6 * Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
7 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
9 * This file is part of InspIRCd. InspIRCd is free software: you can
10 * redistribute it and/or modify it under the terms of the GNU General Public
11 * License as published by the Free Software Foundation, version 2.
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include "socketengine.h"
29 #include "../spanningtree.h"
31 #include "treeserver.h"
33 #include "treesocket.h"
34 #include "resolvers.h"
36 /** Because most of the I/O gubbins are encapsulated within
37 * BufferedSocket, we just call the superclass constructor for
38 * most of the action, and append a few of our own values
41 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, Link* link, Autoconnect* myac, const std::string& ipaddr)
44 age = ServerInstance->Time();
45 linkID = assign(link->Name);
46 capab = new CapabData;
49 capab->capab_phase = 0;
52 ConnectionFailureShown = false;
53 LinkState = CONNECTING;
54 if (!link->Hook.empty())
56 ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, link->Hook);
59 SetError("Could not find hook '" + link->Hook + "' for connection to " + linkID);
62 AddIOHook(prov->creator);
64 DoConnect(ipaddr, link->Port, link->Timeout, link->Bind);
65 Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, link->Timeout);
69 /** When a listening socket gives us a new file descriptor,
70 * we must associate it with a socket without creating a new
71 * connection. This constructor is used for this purpose.
73 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
74 : BufferedSocket(newfd), Utils(Util)
76 capab = new CapabData;
77 capab->capab_phase = 0;
79 age = ServerInstance->Time();
80 LinkState = WAIT_AUTH_1;
82 ConnectionFailureShown = false;
83 linkID = "inbound from " + client->addr();
85 FOREACH_MOD(I_OnHookIO, OnHookIO(this, via));
87 GetIOHook()->OnStreamSocketAccept(this, client, server);
90 Utils->timeoutlist[this] = std::pair<std::string, int>(linkID, 30);
93 ServerState TreeSocket::GetLinkState()
95 return this->LinkState;
98 void TreeSocket::CleanNegotiationInfo()
100 // connect is good, reset the autoconnect block (if used)
102 capab->ac->position = -1;
107 CullResult TreeSocket::cull()
109 Utils->timeoutlist.erase(this);
110 if (capab && capab->ac)
111 Utils->Creator->ConnectServer(capab->ac, false);
112 return this->BufferedSocket::cull();
115 TreeSocket::~TreeSocket()
121 /** When an outbound connection finishes connecting, we receive
122 * this event, and must send our SERVER string to the other
123 * side. If the other side is happy, as outlined in the server
124 * to server docs on the inspircd.org site, the other side
125 * will then send back its own server string.
127 void TreeSocket::OnConnected()
129 if (this->LinkState == CONNECTING)
131 ServerInstance->SNO->WriteGlobalSno('l', "Connection to \2%s\2[%s] started.", linkID.c_str(),
132 (capab->link->HiddenFromStats ? "<hidden>" : capab->link->IPAddr.c_str()));
133 this->SendCapabilities(1);
137 void TreeSocket::OnError(BufferedSocketError e)
139 ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed with error: %s",
140 linkID.c_str(), getError().c_str());
144 void TreeSocket::SendError(const std::string &errormessage)
146 WriteLine("ERROR :"+errormessage);
149 SetError(errormessage);
152 /** This function forces this server to quit, removing this server
153 * and any users on it (and servers and users below that, etc etc).
154 * It's very slow and pretty clunky, but luckily unless your network
155 * is having a REAL bad hair day, this function shouldnt be called
156 * too many times a month ;-)
158 void TreeSocket::SquitServer(std::string &from, TreeServer* Current, int& num_lost_servers, int& num_lost_users)
160 ServerInstance->Logs->Log("m_spanningtree",DEBUG,"SquitServer for %s from %s",
161 Current->GetName().c_str(), from.c_str());
162 /* recursively squit the servers attached to 'Current'.
163 * We're going backwards so we don't remove users
164 * while we still need them ;)
166 for (unsigned int q = 0; q < Current->ChildCount(); q++)
168 TreeServer* recursive_server = Current->GetChild(q);
169 this->SquitServer(from,recursive_server, num_lost_servers, num_lost_users);
171 /* Now we've whacked the kids, whack self */
173 num_lost_users += Current->QuitUsers(from);
176 /** This is a wrapper function for SquitServer above, which
177 * does some validation first and passes on the SQUIT to all
178 * other remaining servers.
180 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
182 bool LocalSquit = false;
184 if ((Current) && (Current != Utils->TreeRoot))
186 DelServerEvent(Utils->Creator, Current->GetName());
188 if (!Current->GetSocket() || Current->GetSocket()->Introduced())
190 parameterlist params;
191 params.push_back(Current->GetName());
192 params.push_back(":"+reason);
193 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
196 if (Current->GetParent() == Utils->TreeRoot)
198 ServerInstance->SNO->WriteGlobalSno('l', "Server \002"+Current->GetName()+"\002 split: "+reason);
203 ServerInstance->SNO->WriteGlobalSno('L', "Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
205 int num_lost_servers = 0;
206 int num_lost_users = 0;
207 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
208 SquitServer(from, Current, num_lost_servers, num_lost_users);
209 ServerInstance->SNO->WriteToSnoMask(LocalSquit ? 'l' : 'L', "Netsplit complete, lost \002%d\002 user%s on \002%d\002 server%s.",
210 num_lost_users, num_lost_users != 1 ? "s" : "", num_lost_servers, num_lost_servers != 1 ? "s" : "");
212 Current->GetParent()->DelChild(Current);
215 if (Current == MyRoot)
222 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Squit from unknown server");
225 /** This function is called when we receive data from a remote
228 void TreeSocket::OnDataReady()
230 Utils->Creator->loopCall = true;
232 while (GetNextLine(line))
234 std::string::size_type rline = line.find('\r');
235 if (rline != std::string::npos)
236 line = line.substr(0,rline);
237 if (line.find('\0') != std::string::npos)
239 SendError("Read null character from socket");
243 if (!getError().empty())
246 if (LinkState != CONNECTED && recvq.length() > 4096)
247 SendError("RecvQ overrun (line too long)");
248 Utils->Creator->loopCall = false;
251 bool TreeSocket::Introduced()
253 return (capab == NULL);