1 | /* |
1 | /* |
2 | global.h -- global variables and constants |
2 | global.h -- global variables and constants |
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3 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
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4 | |
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5 | This file is part of GVPE. |
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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 it |
5 | it under the terms of the GNU General Public License as published by |
8 | under the terms of the GNU General Public License as published by the |
6 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
7 | (at your option) any later version. |
10 | 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, but |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | 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 GNU General |
12 | GNU General Public License for more details. |
15 | 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 along |
15 | along with this program; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | |
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20 | Additional permission under GNU GPL version 3 section 7 |
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21 | |
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22 | If you modify this Program, or any covered work, by linking or |
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23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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24 | version of that library), containing parts covered by the terms of the |
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25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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26 | additional permission to convey the resulting work. Corresponding |
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27 | Source for a non-source form of such a combination shall include the |
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28 | source code for the parts of OpenSSL used as well as that of the |
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29 | covered work. |
17 | */ |
30 | */ |
18 | |
31 | |
19 | #ifndef GLOBAL_H__ |
32 | #ifndef GLOBAL_H__ |
20 | #define GLOBAL_H__ |
33 | #define GLOBAL_H__ |
21 | |
34 | |
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26 | /* Protocol version. Different major versions are incompatible, |
39 | /* Protocol version. Different major versions are incompatible, |
27 | * different minor versions probably are compatible ;) |
40 | * different minor versions probably are compatible ;) |
28 | */ |
41 | */ |
29 | |
42 | |
30 | #define PROTOCOL_MAJOR 0 |
43 | #define PROTOCOL_MAJOR 0 |
31 | #define PROTOCOL_MINOR 0 |
44 | #define PROTOCOL_MINOR 1 |
32 | |
45 | |
33 | #define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8 |
46 | #define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8 |
34 | #define RSA_KEYLEN ((RSA_KEYBITS) >> 3) |
47 | #define RSA_KEYLEN ((RSA_KEYBITS) >> 3) |
35 | #define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl |
48 | #define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl |
36 | |
49 | |
37 | #define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :( |
50 | #define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :( |
38 | #define RSA_HASHLEN (160 >> 3) |
51 | #define RSA_HASHLEN (160 >> 3) |
39 | #define RSA_RESLEN RSA_HASHLEN |
52 | #define RSA_RESLEN RSA_HASHLEN |
40 | |
53 | |
41 | #define RSA_IDLEN 16 // how many bytes are used to identify the challenge |
54 | #define RSA_IDLEN 16 // how many bytes are used to identify the challenge |
42 | #define RSA_TTL 20 // challenge bytes timeout after n seconds |
55 | #define RSA_TTL 120 // challenge bytes timeout after n seconds |
43 | |
56 | |
44 | #define CIPHER ENABLE_CIPHER () |
57 | #define CIPHER ENABLE_CIPHER () |
45 | #define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER)) |
58 | #define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER)) |
46 | #define DIGEST ENABLE_DIGEST () |
59 | #define DIGEST ENABLE_DIGEST () |
47 | #define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY) |
60 | #define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY) |
48 | |
61 | |
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62 | #define WINDOWSIZE 512 // sliding window size |
49 | #define MAX_SEQNO 0xfffffff0U |
63 | #define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8) |
50 | |
64 | |
51 | #define CHG_SEQNO 0 // where the seqno starts within the rsa challenge |
65 | #define CHG_SEQNO 0 // where the seqno starts within the rsa challenge |
52 | #define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge |
66 | #define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge |
53 | #define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!) |
67 | #define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!) |
54 | |
68 | |
55 | // hdr seq len hmac MAC MAC |
69 | // hdr seq len hmac MAC MAC |
56 | #define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6) |
70 | #define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6) |
57 | #define IP_OVERHEAD 20 // size of a (normal) ip header |
71 | #define IP_OVERHEAD 20 // size of a (normal) ip header |
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72 | #define GRE_OVERHEAD (IP_OVERHEAD + 4) |
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73 | #define ICMP_OVERHEAD (IP_OVERHEAD + 4) |
58 | #define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header |
74 | #define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care) |
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75 | #define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength |
59 | #define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol |
76 | #define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count) |
60 | #define ETH_OVERHEAD 14 // the size of an ethernet header |
77 | #define ETH_OVERHEAD 14 // the size of an ethernet header |
61 | #define MAXSIZE (MAX_MTU + VPE_OVERHEAD)// slightly too large, but who cares |
78 | #define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares |
62 | |
79 | |
63 | #define PKTCACHESIZE 4 // the size of the memory pool for packets |
80 | #define PKTCACHESIZE 16 // the size of the memory pool for packets |
64 | |
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65 | #define QUEUEDEPTH 16 // the number of packets that will be queued (should be low) |
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66 | |
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67 | #define WINDOWSIZE 512 // sliding window size |
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68 | |
81 | |
69 | extern char *confbase; // directory in which all config files are |
82 | extern char *confbase; // directory in which all config files are |
70 | extern char *thisnode; // config for current node (TODO: remove) |
83 | extern char *thisnode; // config for current node (TODO: remove) |
71 | extern char *pidfilename; // pid file location |
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72 | |
84 | |
73 | #endif |
85 | #endif |
74 | |
86 | |