gvpe/src/global.h

/*
    global.h -- global variables and constants
    Copyright (C) 2003-2013 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 SEED_SIZE       64 // how many octets to seed rng with

#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

#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  (CHG_SEQNO + 4)                         // where the key starts within the rsa challenge
//#define CHG_HMAC_KEY  (CHG_CIPHER_KEY + CIPHER_KEYLEN)        // where the key starts within the rsa challenge
#define CHG_HMAC_KEY    86                                      // where the key starts within the rsa challenge
// 872 rsa bits used

//                    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)

template<typename T, typename U> static inline T    min    (T  a, U b) { return a < (T)b ? a : (T)b; }
template<typename T, typename U> static inline void min_it (T &a, U b) {    a = a < (T)b ? a : (T)b; }
template<typename T, typename U> static inline T    max    (T  a, U b) { return a > (T)b ? a : (T)b; }
template<typename T, typename U> static inline void max_it (T &a, U b) {    a = a > (T)b ? a : (T)b; }

template<typename T, typename U, typename V> static inline T clamp (T  v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; }

template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }

#endif

Revision:	1.26
Committed:	Sat Jul 13 04:10:29 2013 UTC (10 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_25
Changes since 1.25:	+9 -5 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			global.h -- global variables and constants
3	root	1.26	Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de>
4	pcg	1.1
5	pcg	1.19	This file is part of GVPE.
6
7	pcg	1.24	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	pcg	1.1	*/
31
32			#ifndef GLOBAL_H__
33			#define GLOBAL_H__
34
35			#include "config.h"
36
37			#include <time.h>
38
39	pcg	1.8	/* Protocol version. Different major versions are incompatible,
40			* different minor versions probably are compatible ;)
41			*/
42
43			#define PROTOCOL_MAJOR 0
44	pcg	1.12	#define PROTOCOL_MINOR 1
45	pcg	1.1
46	root	1.26	#define SEED_SIZE 64 // how many octets to seed rng with
47
48	pcg	1.1	#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8
49			#define RSA_KEYLEN ((RSA_KEYBITS) >> 3)
50	pcg	1.6	#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl
51	pcg	1.1
52	pcg	1.6	#define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :(
53			#define RSA_HASHLEN (160 >> 3)
54	pcg	1.7	#define RSA_RESLEN RSA_HASHLEN
55	pcg	1.6
56			#define RSA_IDLEN 16 // how many bytes are used to identify the challenge
57	pcg	1.14	#define RSA_TTL 120 // challenge bytes timeout after n seconds
58	pcg	1.1
59			#define CIPHER ENABLE_CIPHER ()
60			#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER))
61			#define DIGEST ENABLE_DIGEST ()
62	root	1.26	#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key
63	pcg	1.1
64	pcg	1.22	#define WINDOWSIZE 512 // sliding window size
65	pcg	1.21	#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8)
66	pcg	1.1
67	root	1.26	#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge
68			#define CHG_CIPHER_KEY (CHG_SEQNO + 4) // where the key starts within the rsa challenge
69			//#define CHG_HMAC_KEY (CHG_CIPHER_KEY + CIPHER_KEYLEN) // where the key starts within the rsa challenge
70			#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge
71			// 872 rsa bits used
72	pcg	1.1
73	pcg	1.22	// hdr seq len hmac MAC MAC
74			#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
75			#define IP_OVERHEAD 20 // size of a (normal) ip header
76			#define GRE_OVERHEAD (IP_OVERHEAD + 4)
77			#define ICMP_OVERHEAD (IP_OVERHEAD + 4)
78			#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care)
79			#define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength
80			#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count)
81			#define ETH_OVERHEAD 14 // the size of an ethernet header
82			#define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares
83	pcg	1.1
84	pcg	1.23	#define PKTCACHESIZE 16 // the size of the memory pool for packets
85	pcg	1.2
86	pcg	1.1	extern char *confbase; // directory in which all config files are
87			extern char *thisnode; // config for current node (TODO: remove)
88
89	root	1.25	template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
90			template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
91			template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
92			template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
93
94			template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; }
95
96			template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
97
98	pcg	1.1	#endif
99