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Comparing gvpe/src/global.h (file contents):
Revision 1.6 by pcg, Wed Mar 26 01:58:46 2003 UTC vs.
Revision 1.22 by pcg, Sun Dec 2 00:45:42 2007 UTC

1/* 1/*
2 global.h -- global variables and constants 2 global.h -- global variables and constants
3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
3 4
5 This file is part of GVPE.
6
4 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by 8 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or 9 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version. 10 (at your option) any later version.
8 11
9 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details. 15 GNU General Public License for more details.
13 16
14 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
16 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17*/ 20*/
18 21
19#ifndef GLOBAL_H__ 22#ifndef GLOBAL_H__
20#define GLOBAL_H__ 23#define GLOBAL_H__
21 24
22#include "config.h" 25#include "config.h"
23 26
24#include <time.h> 27#include <time.h>
25 28
29/* Protocol version. Different major versions are incompatible,
30 * different minor versions probably are compatible ;)
31 */
32
33#define PROTOCOL_MAJOR 0
34#define PROTOCOL_MINOR 1
26 35
27#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8 36#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8
28#define RSA_KEYLEN ((RSA_KEYBITS) >> 3) 37#define RSA_KEYLEN ((RSA_KEYBITS) >> 3)
29#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl 38#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl
30 39
31#define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :( 40#define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :(
32#define RSA_HASHLEN (160 >> 3) 41#define RSA_HASHLEN (160 >> 3)
42#define RSA_RESLEN RSA_HASHLEN
33 43
34#define RSA_IDLEN 16 // how many bytes are used to identify the challenge 44#define RSA_IDLEN 16 // how many bytes are used to identify the challenge
35#define RSA_TTL 20 // challenge bytes timeout after n seconds 45#define RSA_TTL 120 // challenge bytes timeout after n seconds
36 46
37#define CIPHER ENABLE_CIPHER () 47#define CIPHER ENABLE_CIPHER ()
38#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER)) 48#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER))
39#define DIGEST ENABLE_DIGEST () 49#define DIGEST ENABLE_DIGEST ()
40#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY) 50#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY)
41 51
52#define WINDOWSIZE 512 // sliding window size
42#define MAX_SEQNO 0xfffffff0U 53#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8)
43 54
44#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge 55#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge
45#define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge 56#define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge
46#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!) 57#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!)
47 58
48// hdr seq len hmac MAC MAC 59// hdr seq len hmac MAC MAC
49#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6) 60#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
50#define IP_OVERHEAD 20 // size of a (normal) ip header 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)
51#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header 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
52#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol 66#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count)
53#define ETH_OVERHEAD 14 // the size of an ethernet header 67#define ETH_OVERHEAD 14 // the size of an ethernet header
54#define MAXSIZE (MAX_MTU + VPE_OVERHEAD)// slightly too large, but who cares 68#define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares
55 69
56#define PKTCACHESIZE 4 // the size of the memory pool for packets 70#define PKTCACHESIZE 5 // the size of the memory pool for packets
57 71
58#define QUEUEDEPTH 16 // the number of packets that will be queued (should be low) 72#define QUEUEDEPTH 16 // the number of packets that will be queued (should be low)
59
60#define WINDOWSIZE 512 // sliding window size
61 73
62extern char *confbase; // directory in which all config files are 74extern char *confbase; // directory in which all config files are
63extern char *thisnode; // config for current node (TODO: remove) 75extern char *thisnode; // config for current node (TODO: remove)
64extern char *pidfilename; // pid file location
65 76
66#endif 77#endif
67 78

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