xrdp-proprietary/sesman/scp.c

/*
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

   xrdp: A Remote Desktop Protocol server.
   Copyright (C) Jay Sorg 2005-2007
*/

/**
 *
 * @file scp.c
 * @brief scp (sesman control protocol) common code
 *        scp (sesman control protocol) common code
 *        This code controls which version is being used and starts the appropriate process
 * @author Jay Sorg, Simone Fedele
 * 
 */

#include "sesman.h"

extern int thread_sck;

/******************************************************************************/
void* DEFAULT_CC
scp_process_start(void* sck)
{
  struct SCP_CONNECTION scon;
  struct SCP_SESSION* sdata;

  /* making a local copy of the socket (it's on the stack) */
  /* probably this is just paranoia                        */
  scon.in_sck = thread_sck;
  LOG_DBG("started scp thread on socket %d", scon.in_sck);
  
  /* unlocking thread_sck */
  lock_socket_release();
  
  make_stream(scon.in_s);
  make_stream(scon.out_s);
  
  init_stream(scon.in_s, 8192);
  init_stream(scon.out_s, 8192);
  
  switch (scp_vXs_accept(&scon, &(sdata)))
  {
    case SCP_SERVER_STATE_OK:
      if (sdata->version == 0)
      {
        /* starts processing an scp v0 connection */
        LOG_DBG("accept ok, go on with scp v0\n",0);
        scp_v0_process(&scon, sdata);
      }
      else
      {
        LOG_DBG("accept ok, go on with scp v1\n",0);
	LOG_DBG("user: %s\npass: %s",sdata->username, sdata->password);
        scp_v1_process(&scon, sdata);
      }
      break;
      
    case SCP_SERVER_STATE_VERSION_ERR:
        /* an unknown scp version was requested, so we shut down the */
        /* connection (and log the fact)                             */
        log_message(LOG_LEVEL_WARNING,"unknown protocol version specified. connection refused.");
        break; 
	
    case SCP_SERVER_STATE_NETWORK_ERR:
        log_message(LOG_LEVEL_WARNING,"libscp network error.");
        break; 
	
    case SCP_SERVER_STATE_SEQUENCE_ERR:
        log_message(LOG_LEVEL_WARNING,"libscp sequence error.");
        break; 
	
    case SCP_SERVER_STATE_INTERNAL_ERR:
        /* internal error occurred (eg. malloc() error, ecc.) */
        log_message(LOG_LEVEL_ERROR, "libscp internal error occurred.");
        break;
    default:
	log_message(LOG_LEVEL_ALWAYS, "unknown return from scp_vXs_accept()");
  }
  
  g_tcp_close(scon.in_sck);
  free_stream(scon.in_s);
  free_stream(scon.out_s);
  return 0;
}