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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2010 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "socket.h"
#include "xline.h"
#include "../m_hash.h"
#include "socketengine.h"
#include "main.h"
#include "../spanningtree.h"
#include "utils.h"
#include "treeserver.h"
#include "link.h"
#include "treesocket.h"
#include "resolvers.h"
/** Because most of the I/O gubbins are encapsulated within
* BufferedSocket, we just call the superclass constructor for
* most of the action, and append a few of our own values
* to it.
*/
TreeSocket::TreeSocket(SpanningTreeUtilities* Util, const std::string& shost, int iport, unsigned long maxtime, const std::string &ServerName, const std::string &bindto, Autoconnect* myac, const std::string& hook)
: Utils(Util), IP(shost), myautoconnect(myac)
{
age = ServerInstance->Time();
myhost = ServerName;
capab = new CapabData;
capab->capab_phase = 0;
proto_version = 0;
LinkState = CONNECTING;
if (!hook.empty())
{
ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, hook);
if (!prov)
{
SetError("Could not find hook '" + hook + "' for connection to " + ServerName);
return;
}
AddIOHook(prov->creator);
}
DoConnect(shost, iport, maxtime, bindto);
Utils->timeoutlist[this] = std::pair<std::string, int>(ServerName, maxtime);
SendCapabilities(1);
}
/** When a listening socket gives us a new file descriptor,
* we must associate it with a socket without creating a new
* connection. This constructor is used for this purpose.
*/
TreeSocket::TreeSocket(SpanningTreeUtilities* Util, int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
: BufferedSocket(newfd), Utils(Util)
{
capab = new CapabData;
IP = client->addr();
age = ServerInstance->Time();
LinkState = WAIT_AUTH_1;
capab->capab_phase = 0;
proto_version = 0;
myhost = "inbound from " + IP;
FOREACH_MOD(I_OnHookIO, OnHookIO(this, via));
if (GetIOHook())
GetIOHook()->OnStreamSocketAccept(this, client, server);
SendCapabilities(1);
Utils->timeoutlist[this] = std::pair<std::string, int>(myhost, 30);
}
ServerState TreeSocket::GetLinkState()
{
return this->LinkState;
}
void TreeSocket::CleanNegotiationInfo()
{
delete capab;
capab = NULL;
}
CullResult TreeSocket::cull()
{
Utils->timeoutlist.erase(this);
if (myautoconnect)
Utils->Creator->ConnectServer(myautoconnect, false);
return this->BufferedSocket::cull();
}
TreeSocket::~TreeSocket()
{
if (capab)
delete capab;
}
/** When an outbound connection finishes connecting, we receive
* this event, and must send our SERVER string to the other
* side. If the other side is happy, as outlined in the server
* to server docs on the inspircd.org site, the other side
* will then send back its own server string.
*/
void TreeSocket::OnConnected()
{
if (this->LinkState == CONNECTING)
{
/* we do not need to change state here. */
for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i < Utils->LinkBlocks.end(); ++i)
{
Link* x = *i;
if (x->Name == this->myhost)
{
ServerInstance->SNO->WriteGlobalSno('l', "Connection to \2%s\2[%s] started.", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->IP.c_str()));
capab->OutboundPass = x->SendPass;
this->SendCapabilities(1);
return;
}
}
}
/* There is a (remote) chance that between the /CONNECT and the connection
* being accepted, some muppet has removed the <link> block and rehashed.
* If that happens the connection hangs here until it's closed. Unlikely
* and rather harmless.
*/
ServerInstance->SNO->WriteGlobalSno('l', "Connection to \2%s\2 lost link tag(!)", myhost.c_str());
}
void TreeSocket::OnError(BufferedSocketError e)
{
ServerInstance->SNO->WriteGlobalSno('l', "Connection to \002%s\002 failed with error: %s",
myhost.c_str(), getError().c_str());
ServerInstance->GlobalCulls.AddItem(this);
}
void TreeSocket::SendError(const std::string &errormessage)
{
WriteLine("ERROR :"+errormessage);
DoWrite();
LinkState = DYING;
SetError(errormessage);
}
/** This function forces this server to quit, removing this server
* and any users on it (and servers and users below that, etc etc).
* It's very slow and pretty clunky, but luckily unless your network
* is having a REAL bad hair day, this function shouldnt be called
* too many times a month ;-)
*/
void TreeSocket::SquitServer(std::string &from, TreeServer* Current)
{
ServerInstance->Logs->Log("m_spanningtree",DEBUG,"SquitServer for %s from %s",
Current->GetName().c_str(), from.c_str());
/* recursively squit the servers attached to 'Current'.
* We're going backwards so we don't remove users
* while we still need them ;)
*/
for (unsigned int q = 0; q < Current->ChildCount(); q++)
{
TreeServer* recursive_server = Current->GetChild(q);
this->SquitServer(from,recursive_server);
}
/* Now we've whacked the kids, whack self */
num_lost_servers++;
num_lost_users += Current->QuitUsers(from);
}
/** This is a wrapper function for SquitServer above, which
* does some validation first and passes on the SQUIT to all
* other remaining servers.
*/
void TreeSocket::Squit(TreeServer* Current, const std::string &reason)
{
bool LocalSquit = false;
if ((Current) && (Current != Utils->TreeRoot))
{
DelServerEvent(Utils->Creator, Current->GetName());
parameterlist params;
params.push_back(Current->GetName());
params.push_back(":"+reason);
Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
if (Current->GetParent() == Utils->TreeRoot)
{
ServerInstance->SNO->WriteGlobalSno('l', "Server \002"+Current->GetName()+"\002 split: "+reason);
LocalSquit = true;
}
else
{
ServerInstance->SNO->WriteGlobalSno('L', "Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
}
num_lost_servers = 0;
num_lost_users = 0;
std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
SquitServer(from, Current);
Current->Tidy();
Current->GetParent()->DelChild(Current);
Current->cull();
delete Current;
if (LocalSquit)
ServerInstance->SNO->WriteToSnoMask('l', "Netsplit complete, lost \002%d\002 user%s on \002%d\002 server%s.", num_lost_users, num_lost_users != 1 ? "s" : "", num_lost_servers, num_lost_servers != 1 ? "s" : "");
else
ServerInstance->SNO->WriteToSnoMask('L', "Netsplit complete, lost \002%d\002 user%s on \002%d\002 server%s.", num_lost_users, num_lost_users != 1 ? "s" : "", num_lost_servers, num_lost_servers != 1 ? "s" : "");
}
else
ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Squit from unknown server");
}
/** This function is called when we receive data from a remote
* server.
*/
void TreeSocket::OnDataReady()
{
Utils->Creator->loopCall = true;
std::string line;
while (GetNextLine(line))
{
std::string::size_type rline = line.find('\r');
if (rline != std::string::npos)
line = line.substr(0,rline);
if (line.find('\0') != std::string::npos)
{
SendError("Read null character from socket");
break;
}
ProcessLine(line);
if (!getError().empty())
break;
}
if (LinkState != CONNECTED && recvq.length() > 4096)
SendError("RecvQ overrun (line too long)");
Utils->Creator->loopCall = false;
}
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