forward.h

OpenVPN is a robust and highly flexible tunneling application that uses all of the encryption, authe

/*
 *  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) 2002-2004 James Yonan <[e-mail]>
 *
 *  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 (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))

#define TO_LINK_FRAG(c) ((c)->c2.fragment && fragment_outgoing_defined ((c)->c2.fragment))
#define TO_LINK_DEF(c)  (LINK_OUT(c) || TO_LINK_FRAG(c))

#define IOW_TO_LINK         (1<<0)
#define IOW_TO_TUN          (1<<1)
#define IOW_READ            (1<<2)
#define IOW_SHAPER          (1<<3)
#define IOW_CHECK_RESIDUAL  (1<<4)
#define IOW_FRAG            (1<<5)
#define IOW_MBUF            (1<<6)

void io_wait (struct context *c, unsigned int flags);

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, char *str);

#endif /* FORWARD_H */