src/openvpn/forward.h

   1 /*
   2  *  OpenVPN -- An application to securely tunnel IP networks
   3  *             over a single TCP/UDP port, with support for SSL/TLS-based
   4  *             session authentication and key exchange,
   5  *             packet encryption, packet authentication, and
   6  *             packet compression.
   7  *
   8  *  Copyright (C) 2002-2005 OpenVPN Solutions LLC <info@openvpn.net>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2
  12  *  as published by the Free Software Foundation.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program (see the file COPYING included with this
  21  *  distribution); if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #ifndef FORWARD_H
  26 #define FORWARD_H
  27
  28 #include "openvpn.h"
  29 #include "occ.h"
  30 #include "ping.h"
  31
  32 #define TUN_OUT(c)      (BLEN(&(c)->c2.to_tun) > 0)
  33 #define LINK_OUT(c)     (BLEN(&(c)->c2.to_link) > 0)
  34 #define ANY_OUT(c)      (TUN_OUT(c) || LINK_OUT(c))
  35
  36 #ifdef ENABLE_FRAGMENT
  37 #define TO_LINK_FRAG(c) ((c)->c2.fragment && fragment_outgoing_defined ((c)->c2.fragment))
  38 #else
  39 #define TO_LINK_FRAG(c) (false)
  40 #endif
  41
  42 #define TO_LINK_DEF(c)  (LINK_OUT(c) || TO_LINK_FRAG(c))
  43
  44 #define IOW_TO_TUN          (1<<0)
  45 #define IOW_TO_LINK         (1<<1)
  46 #define IOW_READ_TUN        (1<<2)
  47 #define IOW_READ_LINK       (1<<3)
  48 #define IOW_SHAPER          (1<<4)
  49 #define IOW_CHECK_RESIDUAL  (1<<5)
  50 #define IOW_FRAG            (1<<6)
  51 #define IOW_MBUF            (1<<7)
  52 #define IOW_READ_TUN_FORCE  (1<<8)
  53 #define IOW_WAIT_SIGNAL     (1<<9)
  54
  55 #define IOW_READ            (IOW_READ_TUN|IOW_READ_LINK)
  56
  57 void pre_select (struct context *c);
  58
  59 void process_io (struct context *c);
  60
  61 void encrypt_sign (struct context *c, bool comp_frag);
  62
  63 const char *wait_status_string (struct context *c, struct gc_arena *gc);
  64 void show_wait_status (struct context *c);
  65
  66 void read_incoming_link (struct context *c);
  67 void process_incoming_link (struct context *c);
  68 void read_incoming_tun (struct context *c);
  69 void process_incoming_tun (struct context *c);
  70 void process_outgoing_link (struct context *c);
  71 void process_outgoing_tun (struct context *c);
  72
  73 bool send_control_channel_string (struct context *c, const char *str, int msglevel);
  74
  75 #define PIPV4_PASSTOS         (1<<0)
  76 #define PIPV4_MSSFIX          (1<<1)
  77
  78 void process_ipv4_header (struct context *c, unsigned int flags, struct buffer *buf);
  79
  80 #if P2MP
  81 void schedule_exit (struct context *c, const int n_seconds);
  82 #endif
  83
  84 #endif /* FORWARD_H */