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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 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 "../transport.h"
#include "../m_hash.h"
#include "socketengine.h"
#include "main.h"
#include "utils.h"
#include "treeserver.h"
#include "link.h"
#include "treesocket.h"
#include "resolvers.h"
#include "handshaketimer.h"
/* $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 */
/** 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, std::string shost, int iport, unsigned long maxtime, const std::string &ServerName, const std::string &bindto, Autoconnect* myac, Module* HookMod)
: Utils(Util), IP(shost), myautoconnect(myac)
{
age = ServerInstance->Time();
myhost = ServerName;
capab_phase = 0;
proto_version = 0;
LinkState = CONNECTING;
DoConnect(shost, iport, maxtime, bindto);
Utils->timeoutlist[this] = std::pair<std::string, int>(ServerName, maxtime);
if (HookMod)
BufferedSocketHookRequest(this, Utils->Creator, HookMod).Send();
hstimer = NULL;
}
/** 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, char* ip, Autoconnect* myac, Module* HookMod)
: BufferedSocket(newfd), Utils(Util), IP(ip), myautoconnect(myac)
{
age = ServerInstance->Time();
LinkState = WAIT_AUTH_1;
capab_phase = 0;
proto_version = 0;
/* If we have a transport module hooked to the parent, hook the same module to this
* socket, and set a timer waiting for handshake before we send CAPAB etc.
*/
if (HookMod)
BufferedSocketHookRequest(this, Utils->Creator, HookMod).Send();
hstimer = new HandshakeTimer(ServerInstance, this, &(Utils->LinkBlocks[0]), this->Utils, 1);
ServerInstance->Timers->AddTimer(hstimer);
/* Fix by Brain - inbound sockets need a timeout, too. 30 secs should be pleanty */
Utils->timeoutlist[this] = std::pair<std::string, int>("<unknown>", 30);
}
ServerState TreeSocket::GetLinkState()
{
return this->LinkState;
}
void TreeSocket::CleanNegotiationInfo()
{
ModuleList.clear();
OptModuleList.clear();
CapKeys.clear();
ourchallenge.clear();
theirchallenge.clear();
OutboundPass.clear();
}
TreeSocket::~TreeSocket()
{
if (GetIOHook())
BufferedSocketUnhookRequest(this, Utils->Creator, GetIOHook()).Send();
if (hstimer)
ServerInstance->Timers->DelTimer(hstimer);
Utils->timeoutlist.erase(this);
}
/** 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<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
{
if (x->Name == this->myhost)
{
ServerInstance->SNO->WriteToSnoMask('l', "Connection to \2%s\2[%s] started.", myhost.c_str(), (x->HiddenFromStats ? "<hidden>" : this->IP.c_str()));
this->OutboundPass = x->SendPass;
if (GetIOHook())
{
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());
hstimer = new HandshakeTimer(ServerInstance, this, &(*x), this->Utils, 1);
ServerInstance->Timers->AddTimer(hstimer);
}
else
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->WriteToSnoMask('l', "Connection to \2%s\2 lost link tag(!)", myhost.c_str());
}
void TreeSocket::OnError(BufferedSocketError e)
{
switch (e)
{
case I_ERR_CONNECT:
ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Connection to \002%s\002 refused", myhost.c_str());
Utils->DoFailOver(myautoconnect);
break;
case I_ERR_SOCKET:
ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Could not create socket (%s)", strerror(errno));
break;
case I_ERR_BIND:
ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Error binding socket to address or port (%s)", strerror(errno));
break;
case I_ERR_WRITE:
ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: I/O error on connection (%s)", errno ? strerror(errno) : "Connection closed unexpectedly");
break;
case I_ERR_NOMOREFDS:
ServerInstance->SNO->WriteToSnoMask('l', "Connection failed: Operating system is out of file descriptors!");
break;
default:
if ((errno) && (errno != EINPROGRESS) && (errno != EAGAIN))
ServerInstance->SNO->WriteToSnoMask('l', "Connection to \002%s\002 failed with OS error: %s", myhost.c_str(), strerror(errno));
break;
}
}
void TreeSocket::SendError(const std::string &errormessage)
{
/* Display the error locally as well as sending it remotely */
ServerInstance->SNO->WriteToSnoMask('l', "Sent \2ERROR\2 to %s: %s", (this->InboundServerName.empty() ? this->IP.c_str() : this->InboundServerName.c_str()), errormessage.c_str());
WriteLine("ERROR :"+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))
{
Event rmode((char*)Current->GetName().c_str(), (Module*)Utils->Creator, "lost_server");
rmode.Send(ServerInstance);
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->WriteToSnoMask('l', "Server \002"+Current->GetName()+"\002 split: "+reason);
LocalSquit = true;
}
else
{
ServerInstance->SNO->WriteToSnoMask('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);
delete Current;
if (LocalSquit)
ServerInstance->SNO->WriteToSnoMask('l', "Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
else
ServerInstance->SNO->WriteToSnoMask('L', "Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
}
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;
/* While there is at least one new line in the buffer,
* do something useful (we hope!) with it.
*/
while (recvq.find("\n") != std::string::npos)
{
std::string ret = recvq.substr(0,recvq.find("\n")-1);
recvq = recvq.substr(recvq.find("\n")+1,recvq.length()-recvq.find("\n"));
/* Use rfind here not find, as theres more
* chance of the \r being near the end of the
* string, not the start.
*/
if (ret.find("\r") != std::string::npos)
ret = recvq.substr(0,recvq.find("\r")-1);
/* Process this one, abort if it
* didnt return true.
*/
if (!this->ProcessLine(ret))
{
SetError("ProcessLine returned false");
break;
}
}
Utils->Creator->loopCall = false;
}
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