gvpe/src/global.h

/*
    global.h -- global variables and constants
    Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
 
    This file is part of GVPE.

    GVPE 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 gvpe; if not, write to the Free Software
    Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef GLOBAL_H__
#define GLOBAL_H__

#include "config.h"

#include <time.h>

/* Protocol version. Different major versions are incompatible,
 * different minor versions probably are compatible ;)
 */

#define PROTOCOL_MAJOR 0
#define PROTOCOL_MINOR 1

#define RSA_KEYBITS     1280            // must be >= 1280 and divisible by 8
#define RSA_KEYLEN      ((RSA_KEYBITS) >> 3)
#define RSA_OVERHEAD    (41 + 1)        // well, no define for OAEP in openssl

#define RSA_HASH        EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :(
#define RSA_HASHLEN     (160 >> 3)
#define RSA_RESLEN      RSA_HASHLEN

#define RSA_IDLEN       16              // how many bytes are used to identify the challenge
#define RSA_TTL         120             // challenge bytes timeout after n seconds

#define CIPHER          ENABLE_CIPHER ()
#define CIPHER_KEYLEN   (EVP_CIPHER_key_length (CIPHER))
#define DIGEST          ENABLE_DIGEST ()
#define HMAC_KEYLEN     (256 >> 3)      // number of bits used for the HMAC key (also change CHG_HMAC_KEY)

#define WINDOWSIZE      512             // sliding window size
#define MAX_SEQNO       (0xfffffff0U - WINDOWSIZE * 8)

#define CHG_SEQNO        0      // where the seqno starts within the rsa challenge
#define CHG_CIPHER_KEY   4      // where the key starts within the rsa challenge
#define CHG_HMAC_KEY    86      // where the key starts within the rsa challenge (256 bits at the end!)

//                    hdr seq len              hmac        MAC MAC
#define VPE_OVERHEAD  (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
#define IP_OVERHEAD   20                        // size of a (normal) ip header
#define GRE_OVERHEAD  (IP_OVERHEAD +  4)
#define ICMP_OVERHEAD (IP_OVERHEAD +  4)
#define UDP_OVERHEAD  (IP_OVERHEAD + 20)        // size of a (normal) ip + udp header (wrong, but don't care)
#define TCP_OVERHEAD  (IP_OVERHEAD + 22)        // size of a (normal) ip + tcp header + packetlength
#define MAX_OVERHEAD  UDP_OVERHEAD              // the max. overhead of any protocol (ok, tcp doesn't count)
#define ETH_OVERHEAD  14                        // the size of an ethernet header
#define MAXSIZE       (MAX_MTU + VPE_OVERHEAD)  // slightly too large, but who cares

#define PKTCACHESIZE    16      // the size of the memory pool for packets

extern char *confbase;          // directory in which all config files are
extern char *thisnode;          // config for current node (TODO: remove)

#endif

Revision:	1.23
Committed:	Thu Aug 7 16:34:21 2008 UTC (15 years, 9 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.22:	+1 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			global.h -- global variables and constants
3	pcg	1.19	Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
4	pcg	1.1
5	pcg	1.19	This file is part of GVPE.
6
7			GVPE is free software; you can redistribute it and/or modify
8	pcg	1.1	it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18	pcg	1.19	along with gvpe; if not, write to the Free Software
19	pcg	1.20	Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20	pcg	1.1	*/
21
22			#ifndef GLOBAL_H__
23			#define GLOBAL_H__
24
25			#include "config.h"
26
27			#include <time.h>
28
29	pcg	1.8	/* Protocol version. Different major versions are incompatible,
30			* different minor versions probably are compatible ;)
31			*/
32
33			#define PROTOCOL_MAJOR 0
34	pcg	1.12	#define PROTOCOL_MINOR 1
35	pcg	1.1
36			#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8
37			#define RSA_KEYLEN ((RSA_KEYBITS) >> 3)
38	pcg	1.6	#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl
39	pcg	1.1
40	pcg	1.6	#define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :(
41			#define RSA_HASHLEN (160 >> 3)
42	pcg	1.7	#define RSA_RESLEN RSA_HASHLEN
43	pcg	1.6
44			#define RSA_IDLEN 16 // how many bytes are used to identify the challenge
45	pcg	1.14	#define RSA_TTL 120 // challenge bytes timeout after n seconds
46	pcg	1.1
47			#define CIPHER ENABLE_CIPHER ()
48			#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER))
49			#define DIGEST ENABLE_DIGEST ()
50			#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY)
51
52	pcg	1.22	#define WINDOWSIZE 512 // sliding window size
53	pcg	1.21	#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8)
54	pcg	1.1
55			#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge
56			#define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge
57			#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!)
58
59	pcg	1.22	// hdr seq len hmac MAC MAC
60			#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
61			#define IP_OVERHEAD 20 // size of a (normal) ip header
62			#define GRE_OVERHEAD (IP_OVERHEAD + 4)
63			#define ICMP_OVERHEAD (IP_OVERHEAD + 4)
64			#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care)
65			#define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength
66			#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count)
67			#define ETH_OVERHEAD 14 // the size of an ethernet header
68			#define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares
69	pcg	1.1
70	pcg	1.23	#define PKTCACHESIZE 16 // the size of the memory pool for packets
71	pcg	1.2
72	pcg	1.1	extern char *confbase; // directory in which all config files are
73			extern char *thisnode; // config for current node (TODO: remove)
74
75			#endif
76