/*
  *  OpenVPN -- An application to securely tunnel IP networks
  *             over a single TCP/UDP port, with support for SSL/TLS-based
  *             session authentication and key exchange,
  *             packet encryption, packet authentication, and
  *             packet compression.
  *

  *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>

  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2
  *  as published by the Free Software Foundation.
  *
  *  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 (see the file COPYING included with this
  *  distribution); if not, write to the Free Software Foundation, Inc.,
  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef FORWARD_H
 #define FORWARD_H
 
 #include "openvpn.h"
 #include "occ.h"
 #include "ping.h"
 
 #define TUN_OUT(c)      (BLEN(&(c)->c2.to_tun) > 0)
 #define LINK_OUT(c)     (BLEN(&(c)->c2.to_link) > 0)
 #define ANY_OUT(c)      (TUN_OUT(c) || LINK_OUT(c))
 
 #ifdef ENABLE_FRAGMENT
 #define TO_LINK_FRAG(c) ((c)->c2.fragment && fragment_outgoing_defined ((c)->c2.fragment))
 #else
 #define TO_LINK_FRAG(c) (false)
 #endif
 
 #define TO_LINK_DEF(c)  (LINK_OUT(c) || TO_LINK_FRAG(c))
 
 #define IOW_TO_TUN          (1<<0)
 #define IOW_TO_LINK         (1<<1)
 #define IOW_READ_TUN        (1<<2)
 #define IOW_READ_LINK       (1<<3)
 #define IOW_SHAPER          (1<<4)
 #define IOW_CHECK_RESIDUAL  (1<<5)
 #define IOW_FRAG            (1<<6)
 #define IOW_MBUF            (1<<7)
 #define IOW_READ_TUN_FORCE  (1<<8)
 #define IOW_WAIT_SIGNAL     (1<<9)
 
 #define IOW_READ            (IOW_READ_TUN|IOW_READ_LINK)
 
 void pre_select (struct context *c);
 
 void process_io (struct context *c);
 
 void encrypt_sign (struct context *c, bool comp_frag);
 
 const char *wait_status_string (struct context *c, struct gc_arena *gc);
 void show_wait_status (struct context *c);
 
 void read_incoming_link (struct context *c);
 void process_incoming_link (struct context *c);
 void read_incoming_tun (struct context *c);
 void process_incoming_tun (struct context *c);
 void process_outgoing_link (struct context *c);
 void process_outgoing_tun (struct context *c);
 
 bool send_control_channel_string (struct context *c, const char *str, int msglevel);
 
 #define PIPV4_PASSTOS         (1<<0)
 #define PIPV4_MSSFIX          (1<<1)

 #define PIPV4_OUTGOING        (1<<2)

 #define PIPV4_EXTRACT_DHCP_ROUTER (1<<3)

 
 void process_ipv4_header (struct context *c, unsigned int flags, struct buffer *buf);
 
 #if P2MP

 void schedule_exit (struct context *c, const int n_seconds, const int signal);

 #endif
 
 #endif /* FORWARD_H */