1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
17 #include "../transport.h"
18 #include "../m_hash.h"
19 #include "socketengine.h"
23 #include "treeserver.h"
25 #include "treesocket.h"
26 #include "resolvers.h"
27 #include "handshaketimer.h"
29 /* $ModDep: 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 m_spanningtree/handshaketimer.h */
32 /** Because most of the I/O gubbins are encapsulated within
33 * BufferedSocket, we just call the superclass constructor for
34 * most of the action, and append a few of our own values
37 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, std::string shost, int iport, unsigned long maxtime, const std::string &ServerName, const std::string &bindto, Autoconnect* myac, Module* HookMod)
38 : Utils(Util), IP(shost), myautoconnect(myac)
40 age = ServerInstance->Time();
44 LinkState = CONNECTING;
45 DoConnect(shost, iport, maxtime, bindto);
46 Utils->timeoutlist[this] = std::pair<std::string, int>(ServerName, maxtime);
48 BufferedSocketHookRequest(this, Utils->Creator, HookMod).Send();
52 /** When a listening socket gives us a new file descriptor,
53 * we must associate it with a socket without creating a new
54 * connection. This constructor is used for this purpose.
56 TreeSocket::TreeSocket(SpanningTreeUtilities* Util, int newfd, char* ip, Autoconnect* myac, Module* HookMod)
57 : BufferedSocket(newfd), Utils(Util), IP(ip), myautoconnect(myac)
59 age = ServerInstance->Time();
60 LinkState = WAIT_AUTH_1;
63 /* If we have a transport module hooked to the parent, hook the same module to this
64 * socket, and set a timer waiting for handshake before we send CAPAB etc.
67 BufferedSocketHookRequest(this, Utils->Creator, HookMod).Send();
69 hstimer = new HandshakeTimer(ServerInstance, this, &(Utils->LinkBlocks[0]), this->Utils, 1);
70 ServerInstance->Timers->AddTimer(hstimer);
72 /* Fix by Brain - inbound sockets need a timeout, too. 30 secs should be pleanty */
73 Utils->timeoutlist[this] = std::pair<std::string, int>("<unknown>", 30);
76 ServerState TreeSocket::GetLinkState()
78 return this->LinkState;
81 void TreeSocket::CleanNegotiationInfo()
84 OptModuleList.clear();
87 theirchallenge.clear();
91 TreeSocket::~TreeSocket()
94 BufferedSocketUnhookRequest(this, Utils->Creator, GetIOHook()).Send();
96 ServerInstance->Timers->DelTimer(hstimer);
97 Utils->timeoutlist.erase(this);
100 /** When an outbound connection finishes connecting, we receive
101 * this event, and must send our SERVER string to the other
102 * side. If the other side is happy, as outlined in the server
103 * to server docs on the inspircd.org site, the other side
104 * will then send back its own server string.
106 void TreeSocket::OnConnected()
108 if (this->LinkState == CONNECTING)
110 /* we do not need to change state here. */
111 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
113 if (x->Name == this->myhost)
115 ServerInstance->SNO->WriteToSnoMask('l', "Connection to \2%s\2[%s] started.", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->IP.c_str()));
116 this->OutboundPass = x->SendPass;
119 ServerInstance->SNO->WriteToSnoMask('l', "Connection to \2%s\2[%s] using transport \2%s\2", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->IP.c_str()), x->Hook.c_str());
120 hstimer = new HandshakeTimer(ServerInstance, this, &(*x), this->Utils, 1);
121 ServerInstance->Timers->AddTimer(hstimer);
124 this->SendCapabilities(1);
129 /* There is a (remote) chance that between the /CONNECT and the connection
130 * being accepted, some muppet has removed the <link> block and rehashed.
131 * If that happens the connection hangs here until it's closed. Unlikely
132 * and rather harmless.
134 ServerInstance->SNO->WriteToSnoMask('l', "Connection to \2%s\2 lost link tag(!)", myhost.c_str());
137 void TreeSocket::OnError(BufferedSocketError e)
142 ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Connection to \002%s\002 refused", myhost.c_str());
143 Utils->DoFailOver(myautoconnect);
146 ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Could not create socket (%s)", strerror(errno));
149 ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Error binding socket to address or port (%s)", strerror(errno));
152 ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: I/O error on connection (%s)", errno ? strerror(errno) : "Connection closed unexpectedly");
154 case I_ERR_NOMOREFDS:
155 ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Operating system is out of file descriptors!");
158 if ((errno) && (errno != EINPROGRESS) && (errno != EAGAIN))
159 ServerInstance->SNO->WriteToSnoMask('l', "Connection to \002%s\002 failed with OS error: %s", myhost.c_str(), strerror(errno));
164 void TreeSocket::SendError(const std::string &errormessage)
166 /* Display the error locally as well as sending it remotely */
167 ServerInstance->SNO->WriteToSnoMask('l', "Sent \2ERROR\2 to %s: %s", (this->InboundServerName.empty() ? this->IP.c_str() : this->InboundServerName.c_str()), errormessage.c_str());
168 WriteLine("ERROR :"+errormessage);
171 /** This function forces this server to quit, removing this server
172 * and any users on it (and servers and users below that, etc etc).
173 * It's very slow and pretty clunky, but luckily unless your network
174 * is having a REAL bad hair day, this function shouldnt be called
175 * too many times a month ;-)
177 void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
179 /* recursively squit the servers attached to 'Current'.
180 * We're going backwards so we don't remove users
181 * while we still need them ;)
183 for (unsigned int q = 0; q < Current->ChildCount(); q++)
185 TreeServer* recursive_server = Current->GetChild(q);
186 this->SquitServer(from,recursive_server);
188 /* Now we've whacked the kids, whack self */
190 num_lost_users += Current->QuitUsers(from);
193 /** This is a wrapper function for SquitServer above, which
194 * does some validation first and passes on the SQUIT to all
195 * other remaining servers.
197 void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
199 bool LocalSquit = false;
201 if ((Current) && (Current != Utils->TreeRoot))
203 Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
204 rmode.Send(ServerInstance);
206 parameterlist params;
207 params.push_back(Current->GetName());
208 params.push_back(":"+reason);
209 Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
210 if (Current->GetParent() == Utils->TreeRoot)
212 ServerInstance->SNO->WriteToSnoMask('l', "Server \002"+Current->GetName()+"\002 split: "+reason);
217 ServerInstance->SNO->WriteToSnoMask('L', "Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
219 num_lost_servers = 0;
221 std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
222 SquitServer(from, Current);
224 Current->GetParent()->DelChild(Current);
227 ServerInstance->SNO->WriteToSnoMask('l', "Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
229 ServerInstance->SNO->WriteToSnoMask('L', "Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
232 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Squit from unknown server");
235 /** This function is called when we receive data from a remote
238 void TreeSocket::OnDataReady()
240 Utils->Creator->loopCall = true;
241 /* While there is at least one new line in the buffer,
242 * do something useful (we hope!) with it.
244 while (recvq.find("\n") != std::string::npos)
246 std::string ret = recvq.substr(0,recvq.find("\n")-1);
247 recvq = recvq.substr(recvq.find("\n")+1,recvq.length()-recvq.find("\n"));
248 /* Use rfind here not find, as theres more
249 * chance of the \r being near the end of the
250 * string, not the start.
252 if (ret.find("\r") != std::string::npos)
253 ret = recvq.substr(0,recvq.find("\r")-1);
254 /* Process this one, abort if it
257 if (!this->ProcessLine(ret))
259 SetError("ProcessLine returned false");
263 Utils->Creator->loopCall = false;