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/*
* 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)
#define PIPV4_CLIENT_NAT (1<<4)
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 */
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