gvpe/src/global.h

/*
    global.h -- global variables and constants
    Copyright (C) 2003-2008 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 3 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; if not, see <http://www.gnu.org/licenses/>.
   
    Additional permission under GNU GPL version 3 section 7
   
    If you modify this Program, or any covered work, by linking or
    combining it with the OpenSSL project's OpenSSL library (or a modified
    version of that library), containing parts covered by the terms of the
    OpenSSL or SSLeay licenses, the licensors of this Program grant you
    additional permission to convey the resulting work.  Corresponding
    Source for a non-source form of such a combination shall include the
    source code for the parts of OpenSSL used as well as that of the
    covered work.
*/

#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:	1.24
Committed:	Thu Aug 7 17:54:27 2008 UTC (15 years, 9 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_2, rel-2_21, rel-2_22
Changes since 1.23:	+24 -14 lines
Log Message:	update to gplv3, finally
#	Content
1	/*
2	global.h -- global variables and constants
3	Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4
5	This file is part of GVPE.
6
7	GVPE is free software; you can redistribute it and/or modify it
8	under the terms of the GNU General Public License as published by the
9	Free Software Foundation; either version 3 of the License, or (at your
10	option) any later version.
11
12	This program is distributed in the hope that it will be useful, but
13	WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15	Public License for more details.
16
17	You should have received a copy of the GNU General Public License along
18	with this program; if not, see <http://www.gnu.org/licenses/>.
19
20	Additional permission under GNU GPL version 3 section 7
21
22	If you modify this Program, or any covered work, by linking or
23	combining it with the OpenSSL project's OpenSSL library (or a modified
24	version of that library), containing parts covered by the terms of the
25	OpenSSL or SSLeay licenses, the licensors of this Program grant you
26	additional permission to convey the resulting work. Corresponding
27	Source for a non-source form of such a combination shall include the
28	source code for the parts of OpenSSL used as well as that of the
29	covered work.
30	*/
31
32	#ifndef GLOBAL_H__
33	#define GLOBAL_H__
34
35	#include "config.h"
36
37	#include <time.h>
38
39	/* Protocol version. Different major versions are incompatible,
40	* different minor versions probably are compatible ;)
41	*/
42
43	#define PROTOCOL_MAJOR 0
44	#define PROTOCOL_MINOR 1
45
46	#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8
47	#define RSA_KEYLEN ((RSA_KEYBITS) >> 3)
48	#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl
49
50	#define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :(
51	#define RSA_HASHLEN (160 >> 3)
52	#define RSA_RESLEN RSA_HASHLEN
53
54	#define RSA_IDLEN 16 // how many bytes are used to identify the challenge
55	#define RSA_TTL 120 // challenge bytes timeout after n seconds
56
57	#define CIPHER ENABLE_CIPHER ()
58	#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER))
59	#define DIGEST ENABLE_DIGEST ()
60	#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY)
61
62	#define WINDOWSIZE 512 // sliding window size
63	#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8)
64
65	#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge
66	#define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge
67	#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!)
68
69	// hdr seq len hmac MAC MAC
70	#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
71	#define IP_OVERHEAD 20 // size of a (normal) ip header
72	#define GRE_OVERHEAD (IP_OVERHEAD + 4)
73	#define ICMP_OVERHEAD (IP_OVERHEAD + 4)
74	#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care)
75	#define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength
76	#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count)
77	#define ETH_OVERHEAD 14 // the size of an ethernet header
78	#define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares
79
80	#define PKTCACHESIZE 16 // the size of the memory pool for packets
81
82	extern char *confbase; // directory in which all config files are
83	extern char *thisnode; // config for current node (TODO: remove)
84
85	#endif
86