/*
 *  anytun
 *
 *  The secure anycast tunneling protocol (satp) defines a protocol used
 *  for communication between any combination of unicast and anycast
 *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
 *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
 *  ethernet, ip, arp ...). satp directly includes cryptography and
 *  message authentication based on the methodes used by SRTP.  It is
 *  intended to deliver a generic, scaleable and secure solution for
 *  tunneling and relaying of packets of any protocol.
 *
 *
 *  Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl, 
 *                          Christian Pointner <satp@wirdorange.org>
 *
 *  This file is part of Anytun.
 *
 *  Anytun is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 3 as
 *  published by the Free Software Foundation.
 *
 *  Anytun is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with anytun.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <iostream>
#include <fstream>
#include <poll.h>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>
#include <string>

#include "datatypes.h"

#include "log.h"
#include "signalController.h"
#include "options.h"

#include "syncServer.h"
#include "daemon.hpp"

void syncOnConnect(SyncTcpConnection * connptr)
{
  std::ifstream file( gOpt.getFileName().c_str() );
  if( file.is_open() )
	{
	   std::string line;
		 while (! file.eof() )
		 {
		   getline (file,line);
			 connptr->Send(line);
		 }
	 file.close();
	}
}

void syncListener()
{
 boost::asio::io_service io_service;
  try
  {
		SyncTcpConnection::proto::resolver resolver(io_service);
		SyncTcpConnection::proto::endpoint e;
		if(gOpt.getBindToAddr()!="")
		{
			SyncTcpConnection::proto::resolver::query query(gOpt.getBindToAddr(), gOpt.getBindToPort());
			e = *resolver.resolve(query);
		} else {
			SyncTcpConnection::proto::resolver::query query(gOpt.getBindToPort());
			e = *resolver.resolve(query);
		}


    SyncServer server(io_service,e);
		server.onConnect=boost::bind(syncOnConnect,_1);
    io_service.run();
  }
  catch (std::exception& e)
  {
    std::string addr = gOpt.getBindToAddr() == "" ? "*" : gOpt.getBindToAddr();
    cLog.msg(Log::PRIO_ERR) << "cannot bind to " << addr << ":" << gOpt.getBindToPort()
                            << " (" << e.what() << ") exiting.." << std::endl;
    //return false;
  }
  //return true;
}

int main(int argc, char* argv[])
{
  bool daemonized=false;
  try 
  {
    cLog.addTarget("syslog:7,anytun-controld,daemon");
    cLog.msg(Log::PRIO_NOTICE) << "anytun-controld started...";
  
    try 
    {
      bool result = gOpt.parse(argc, argv);
      if(!result) {
        cLog.msg(Log::PRIO_NOTICE) << "printing help text and exitting";
        gOpt.printUsage();
        exit(0);
      }
    }
    catch(syntax_error& e)
    {
      std::cerr << e << std::endl;
      cLog.msg(Log::PRIO_NOTICE) << "exitting after syntax error";
      gOpt.printUsage();
      exit(-1);
    }
       
    std::ifstream file( gOpt.getFileName().c_str() );
    if( file.is_open() )
      file.close();
    else {
      std::cout << "ERROR: unable to open file!" << std::endl;
      exit(-1);
    }
    
    PrivInfo privs(gOpt.getUsername(), gOpt.getGroupname());

    std::ofstream pidFile;
    if(gOpt.getPidFile() != "") {
      pidFile.open(gOpt.getPidFile().c_str());
      if(!pidFile.is_open()) {
        std::cout << "can't open pid file" << std::endl;
      }
    }
    
    if(gOpt.getChrootDir() != "")
      do_chroot(gOpt.getChrootDir());
    
    privs.drop();

    if(gOpt.getDaemonize()) {
      daemonize();
      daemonized = true;
    }

    if(pidFile.is_open()) {
      pid_t pid = getpid();
      pidFile << pid;
      pidFile.close();
    }

    gSignalController.init();
    
    boost::thread * syncListenerThread;
    syncListenerThread = new boost::thread(boost::bind(syncListener));
    
    int ret = gSignalController.run();
    
    return ret;
  }
  catch(std::runtime_error& e)
  {
    if(daemonized)
      cLog.msg(Log::PRIO_ERR) << "uncaught runtime error, exiting: " << e.what();
    else
      std::cout << "uncaught runtime error, exiting: " << e.what() << std::endl;
  }
  catch(std::exception& e)
  {
    if(daemonized)
      cLog.msg(Log::PRIO_ERR) << "uncaught exception, exiting: " << e.what();
    else
      std::cout << "uncaught exception, exiting: " << e.what() << std::endl;
  }
}