diff options
Diffstat (limited to 'occ.h')
| -rw-r--r-- | occ.h | 95 |
1 files changed, 0 insertions, 95 deletions
@@ -1,95 +0,0 @@ -/* - * 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 OCC_H -#define OCC_H - -#ifdef ENABLE_OCC - -#include "forward.h" - -/* OCC_STRING_SIZE must be set to sizeof (occ_magic) */ -#define OCC_STRING_SIZE 16 - -/* - * OCC (OpenVPN Configuration Control) protocol opcodes. - */ - -#define OCC_REQUEST 0 /* request options string from peer */ -#define OCC_REPLY 1 /* deliver options string to peer */ - -/* - * Send an OCC_REQUEST once every OCC_INTERVAL - * seconds until a reply is received. - * - * If we haven't received a reply after - * OCC_N_TRIES, give up. - */ -#define OCC_INTERVAL_SECONDS 10 -#define OCC_N_TRIES 12 - -/* - * Other OCC protocol opcodes used to estimate the MTU empirically. - */ -#define OCC_MTU_LOAD_REQUEST 2 /* Ask peer to send a big packet to us */ -#define OCC_MTU_LOAD 3 /* Send a big packet to peer */ -#define OCC_MTU_REQUEST 4 /* Ask peer to tell us the largest - packet it has received from us so far */ -#define OCC_MTU_REPLY 5 /* Send largest packet size to peer */ - -/* - * Process one command from mtu_load_test_sequence - * once every n seconds, if --mtu-test is specified. - */ -#define OCC_MTU_LOAD_INTERVAL_SECONDS 3 - -/* - * Send an exit message to remote. - */ -#define OCC_EXIT 6 - -/* - * Used to conduct a load test command sequence - * of UDP connection for empirical MTU measurement. - */ -struct mtu_load_test -{ - int op; /* OCC opcode to send to peer */ - int delta; /* determine packet size to send by using - this delta against currently - configured MTU */ -}; - -extern const uint8_t occ_magic[]; - -static inline bool -is_occ_msg (const struct buffer* buf) -{ - return buf_string_match_head (buf, occ_magic, OCC_STRING_SIZE); -} - -void process_received_occ_msg (struct context *c); - -#endif -#endif |