222 lines
4.9 KiB
C
222 lines
4.9 KiB
C
/*
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VTun - Virtual Tunnel over TCP/IP network.
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Copyright (C) 1998-2000 Maxim Krasnyansky <max_mk@yahoo.com>
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VTun has been derived from VPPP package by Maxim Krasnyansky.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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/*
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* $Id: vtun.h,v 1.12.2.1 2007/06/29 05:26:49 mtbishop Exp $
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*/
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#ifndef _VTUN_H
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#define _VTUN_H
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#include "llist.h"
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/* Default VTUN port */
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#define VTUN_PORT 5000
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/* Default VTUN connect timeout in sec */
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#define VTUN_CONNECT_TIMEOUT 30
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/* General VTUN timeout for several operations, in sec */
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#define VTUN_TIMEOUT 30
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/* Number of seconds for delay after pppd startup*/
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#define VTUN_DELAY_SEC 10
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/* Statistic interval in seconds */
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#define VTUN_STAT_IVAL 5*60 /* 5 min */
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/* Max lenght of device name */
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#define VTUN_DEV_LEN 20
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/* End of configurable part */
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struct vtun_sopt {
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char *dev;
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char *laddr;
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int lport;
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char *raddr;
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int rport;
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};
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struct vtun_stat {
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unsigned long byte_in;
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unsigned long byte_out;
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unsigned long comp_in;
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unsigned long comp_out;
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FILE *file;
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};
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struct vtun_cmd {
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char *prog;
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char *args;
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int flags;
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};
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/* Command flags */
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#define VTUN_CMD_WAIT 0x01
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#define VTUN_CMD_DELAY 0x02
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#define VTUN_CMD_SHELL 0x04
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struct vtun_addr {
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char *name;
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char *ip;
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int port;
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int type;
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};
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/* Address types */
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#define VTUN_ADDR_IFACE 0x01
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#define VTUN_ADDR_NAME 0x02
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struct vtun_host {
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char *host;
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char *passwd;
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char *dev;
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llist up;
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llist down;
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int flags;
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int timeout;
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int spd_in;
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int spd_out;
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int zlevel;
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int cipher;
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int rmt_fd;
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int loc_fd;
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/* Persist mode */
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int persist;
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/* Multiple connections */
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int multi;
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/* Keep Alive */
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int ka_interval;
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int ka_failure;
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/* Source address */
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struct vtun_addr src_addr;
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struct vtun_stat stat;
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struct vtun_sopt sopt;
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};
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extern llist host_list;
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/* Flags definitions */
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#define VTUN_TTY 0x0100
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#define VTUN_PIPE 0x0200
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#define VTUN_ETHER 0x0400
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#define VTUN_TUN 0x0800
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#define VTUN_TYPE_MASK (VTUN_TTY | VTUN_PIPE | VTUN_ETHER | VTUN_TUN)
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#define VTUN_TCP 0x0010
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#define VTUN_UDP 0x0020
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#define VTUN_PROT_MASK (VTUN_TCP | VTUN_UDP)
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#define VTUN_KEEP_ALIVE 0x0040
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#define VTUN_ZLIB 0x0001
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#define VTUN_LZO 0x0002
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#define VTUN_SHAPE 0x0004
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#define VTUN_ENCRYPT 0x0008
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/* Cipher options */
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#define VTUN_ENC_BF128ECB 1
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#define VTUN_ENC_BF128CBC 2
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#define VTUN_ENC_BF128CFB 3
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#define VTUN_ENC_BF128OFB 4
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#define VTUN_ENC_BF256ECB 5
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#define VTUN_ENC_BF256CBC 6
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#define VTUN_ENC_BF256CFB 7
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#define VTUN_ENC_BF256OFB 8
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#define VTUN_ENC_AES128ECB 9
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#define VTUN_ENC_AES128CBC 10
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#define VTUN_ENC_AES128CFB 11
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#define VTUN_ENC_AES128OFB 12
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#define VTUN_ENC_AES256ECB 13
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#define VTUN_ENC_AES256CBC 14
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#define VTUN_ENC_AES256CFB 15
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#define VTUN_ENC_AES256OFB 16
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/* Mask to drop the flags which will be supplied by the server */
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#define VTUN_CLNT_MASK 0xf000
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#define VTUN_STAT 0x1000
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#define VTUN_PERSIST 0x2000
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/* Constants and flags for VTun protocol */
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#define VTUN_FRAME_SIZE 2048
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#define VTUN_FRAME_OVERHEAD 100
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#define VTUN_FSIZE_MASK 0x0fff
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#define VTUN_CONN_CLOSE 0x1000
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#define VTUN_ECHO_REQ 0x2000
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#define VTUN_ECHO_REP 0x4000
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#define VTUN_BAD_FRAME 0x8000
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/* Authentication message size */
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#define VTUN_MESG_SIZE 50
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/* Support for multiple connections */
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#define VTUN_MULTI_DENY 0 /* no */
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#define VTUN_MULTI_ALLOW 1 /* yes */
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#define VTUN_MULTI_KILL 2
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/* keep interface in persistant mode */
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#define VTUN_PERSIST_KEEPIF 2
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/* Values for the signal flag */
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#define VTUN_SIG_TERM 1
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#define VTUN_SIG_HUP 2
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/* Global options */
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struct vtun_opts {
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int timeout;
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int persist;
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char *cfg_file;
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char *shell; /* Shell */
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char *ppp; /* Command to configure ppp devices */
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char *ifcfg; /* Command to configure net devices */
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char *route; /* Command to configure routing */
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char *fwall; /* Command to configure FireWall */
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char *iproute; /* iproute command */
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char *svr_name; /* Server's host name */
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char *svr_addr; /* Server's address (string) */
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struct vtun_addr bind_addr; /* Server should listen on this address */
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int svr_type; /* Server mode */
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int syslog; /* Facility to log messages to syslog under */
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};
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#define VTUN_STAND_ALONE 0
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#define VTUN_INETD 1
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extern struct vtun_opts vtun;
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void server(int sock);
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void client(struct vtun_host *host);
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int tunnel(struct vtun_host *host);
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int read_config(char *file);
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struct vtun_host * find_host(char *host);
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#endif
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