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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
*
* Written by Craig Edwards, Craig McLure, and others.
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
using namespace std;
#include <stdio.h>
#include <string>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "inspircd.h"
/* $ModDesc: Provides support for RFC 1413 ident lookups */
// Version 1.5.0.0 - Updated to use InspSocket, faster and neater.
class RFC1413 : public InspSocket
{
protected:
Server* Srv; // Server* class used for core communications
userrec* u; // user record that the lookup is associated with
sockaddr_in sock_us; // our port number
sockaddr_in sock_them; // their port number
socklen_t uslen; // length of our port number
socklen_t themlen; // length of their port number
char ident_request[128]; // buffer used to make up the request string
public:
// The destructor makes damn sure the socket is freed :)
RFC1413(userrec* user, int maxtime, Server* S) : InspSocket(user->host, 113, false, maxtime), Srv(S), u(user)
{
Srv->Log(DEBUG,"Ident: associated with user "+std::string(user->nick));
}
virtual void OnTimeout()
{
// When we timeout, the connection failed within the allowed timeframe,
// so we just display a notice, and tidy off the ident_data.
u->Shrink("ident_data");
Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Could not find your ident, using "+std::string(u->ident)+" instead.");
}
virtual bool OnDataReady()
{
std::string databuf = this->Read();
if (databuf != "")
{
char ibuf[1024];
strlcpy(ibuf,databuf.c_str(),1024);
Srv->Log(DEBUG,"Received ident response");
char* savept;
char* section = strtok_r(ibuf,":",&savept);
while (section)
{
if (strstr(section,"USERID"))
{
section = strtok_r(NULL,":",&savept);
if (section)
{
// ID type, usually UNIX or OTHER... we dont want it, so read the next token
section = strtok_r(NULL,":",&savept);
if (section)
{
while (*section == ' ') section++; // strip leading spaces
int t = strlen(section);
for (int j = 0; j < t; j++)
if ((section[j] < 33) || (section[j]>126))
section[j] = '\0'; // truncate at invalid chars
if (strlen(section))
{
strlcpy(u->ident,section,IDENTMAX);
Srv->Log(DEBUG,"IDENT SET: "+std::string(u->ident));
Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Found your ident: "+std::string(u->ident));
}
return false;
}
}
}
section = strtok_r(NULL,":",&savept);
}
}
return false;
}
virtual void OnClose()
{
// tidy up after ourselves when the connection is done.
// We receive this event straight after a timeout, too.
u->Shrink("ident_data");
}
virtual bool OnConnected()
{
uslen = sizeof(sock_us);
themlen = sizeof(sock_them);
if ((getsockname(this->u->fd,(sockaddr*)&sock_us,&uslen) || getpeername(this->u->fd, (sockaddr*)&sock_them, &themlen)))
{
Srv->Log(DEBUG,"Ident: failed to get socket names, bailing");
return false;
}
else
{
// send the request in the following format: theirsocket,oursocket
snprintf(ident_request,127,"%d,%d\r\n",ntohs(sock_them.sin_port),ntohs(sock_us.sin_port));
this->Write(ident_request);
Srv->Log(DEBUG,"Sent ident request, waiting for reply");
return true;
}
}
};
class ModuleIdent : public Module
{
ConfigReader* Conf;
Server* Srv;
int IdentTimeout;
public:
void ReadSettings()
{
Conf = new ConfigReader;
IdentTimeout = Conf->ReadInteger("ident","timeout",0,true);
if (!IdentTimeout)
IdentTimeout = 1;
delete Conf;
}
ModuleIdent(Server* Me)
: Module::Module(Me)
{
Srv = Me;
ReadSettings();
}
void Implements(char* List)
{
List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
}
virtual void OnRehash(std::string parameter)
{
ReadSettings();
}
virtual void OnUserRegister(userrec* user)
{
// when the new user connects, before they authenticate with USER/NICK/PASS, we do
// their ident lookup. We do this by instantiating an object of type RFC1413, which
// is derived from InspSocket, and inserting it into the socket engine using the
// Server::AddSocket() call.
Srv->SendServ(user->fd,"NOTICE "+std::string(user->nick)+" :*** Looking up your ident...");
RFC1413* ident = new RFC1413(user, IdentTimeout, Srv);
user->Extend("ident_data", (char*)ident);
Srv->AddSocket(ident);
}
virtual bool OnCheckReady(userrec* user)
{
// The socket engine will clean up their ident request for us when it completes,
// either due to timeout or due to closing, so, we just hold them until they dont
// have an ident field any more.
RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
return (!ident);
}
virtual void OnUserDisconnect(userrec* user)
{
// when the user quits tidy up any ident lookup they have pending to keep things tidy.
// When we call RemoveSocket, the abstractions tied into the system evnetually work their
// way to RFC1459::OnClose(), which shrinks off the ident_data for us, so we dont need
// to do it here. If we don't tidy this up, there may still be lingering idents for users
// who have quit, as class RFC1459 is only loosely bound to userrec* via a pair of pointers
// and this would leave at least one of the invalid ;)
RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
if (ident)
{
Srv->RemoveSocket(ident);
}
}
virtual ~ModuleIdent()
{
}
virtual Version GetVersion()
{
return Version(1,5,0,0,VF_VENDOR);
}
};
class ModuleIdentFactory : public ModuleFactory
{
public:
ModuleIdentFactory()
{
}
~ModuleIdentFactory()
{
}
virtual Module * CreateModule(Server* Me)
{
return new ModuleIdent(Me);
}
};
extern "C" void * init_module( void )
{
return new ModuleIdentFactory;
}
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