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/* |
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global.h -- global variables and constants |
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Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
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This file is part of GVPE. |
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GVPE is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with gvpe; if not, write to the Free Software |
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Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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#ifndef GLOBAL_H__ |
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#define GLOBAL_H__ |
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|
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#include "config.h" |
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|
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#include <time.h> |
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|
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/* Protocol version. Different major versions are incompatible, |
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* different minor versions probably are compatible ;) |
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*/ |
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#define PROTOCOL_MAJOR 0 |
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#define PROTOCOL_MINOR 1 |
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|
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#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8 |
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#define RSA_KEYLEN ((RSA_KEYBITS) >> 3) |
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#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl |
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|
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#define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :( |
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#define RSA_HASHLEN (160 >> 3) |
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#define RSA_RESLEN RSA_HASHLEN |
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|
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#define RSA_IDLEN 16 // how many bytes are used to identify the challenge |
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#define RSA_TTL 120 // challenge bytes timeout after n seconds |
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|
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#define CIPHER ENABLE_CIPHER () |
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#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER)) |
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#define DIGEST ENABLE_DIGEST () |
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#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY) |
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|
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#define WINDOWSIZE 512 // sliding window size |
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#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8) |
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|
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#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge |
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#define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge |
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#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!) |
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|
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// hdr seq len hmac MAC MAC |
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#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6) |
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#define IP_OVERHEAD 20 // size of a (normal) ip header |
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#define GRE_OVERHEAD (IP_OVERHEAD + 4) |
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#define ICMP_OVERHEAD (IP_OVERHEAD + 4) |
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#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care) |
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#define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength |
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#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count) |
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#define ETH_OVERHEAD 14 // the size of an ethernet header |
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#define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares |
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#define PKTCACHESIZE 5 // the size of the memory pool for packets |
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#define QUEUEDEPTH 16 // the number of packets that will be queued (should be low) |
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extern char *confbase; // directory in which all config files are |
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extern char *thisnode; // config for current node (TODO: remove) |
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#endif |
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