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Diffstat (limited to 'tap-win32/macinfo.c')
| -rwxr-xr-x | tap-win32/macinfo.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/tap-win32/macinfo.c b/tap-win32/macinfo.c deleted file mode 100755 index 8d512ec..0000000 --- a/tap-win32/macinfo.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * TAP-Win32/TAP-Win64 -- A kernel driver to provide virtual tap - * device functionality on Windows. - * - * This code was inspired by the CIPE-Win32 driver by Damion K. Wilson. - * - * This source code is Copyright (C) 2002-2010 OpenVPN Technologies, Inc., - * and is released under the GPL version 2 (see below). - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * 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 (see the file COPYING included with this - * distribution); if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include "macinfo.h" - -int -HexStringToDecimalInt (const int p_Character) -{ - int l_Value = 0; - - if (p_Character >= 'A' && p_Character <= 'F') - l_Value = (p_Character - 'A') + 10; - else if (p_Character >= 'a' && p_Character <= 'f') - l_Value = (p_Character - 'a') + 10; - else if (p_Character >= '0' && p_Character <= '9') - l_Value = p_Character - '0'; - - return l_Value; -} - -BOOLEAN -ParseMAC (MACADDR dest, const char *src) -{ - int c; - int mac_index = 0; - BOOLEAN high_digit = FALSE; - int delim_action = 1; - - MYASSERT (src); - MYASSERT (dest); - - CLEAR_MAC (dest); - - while (c = *src++) - { - if (IsMacDelimiter (c)) - { - mac_index += delim_action; - high_digit = FALSE; - delim_action = 1; - } - else if (IsHexDigit (c)) - { - const int digit = HexStringToDecimalInt (c); - if (mac_index < sizeof (MACADDR)) - { - if (!high_digit) - { - dest[mac_index] = (char)(digit); - high_digit = TRUE; - delim_action = 1; - } - else - { - dest[mac_index] = (char)(dest[mac_index] * 16 + digit); - ++mac_index; - high_digit = FALSE; - delim_action = 0; - } - } - else - return FALSE; - } - else - return FALSE; - } - - return (mac_index + delim_action) >= sizeof (MACADDR); -} - -/* - * Generate a MAC using the GUID in the adapter name. - * - * The mac is constructed as 00:FF:xx:xx:xx:xx where - * the Xs are taken from the first 32 bits of the GUID in the - * adapter name. This is similar to the Linux 2.4 tap MAC - * generator, except linux uses 32 random bits for the Xs. - * - * In general, this solution is reasonable for most - * applications except for very large bridged TAP networks, - * where the probability of address collisions becomes more - * than infintesimal. - * - * Using the well-known "birthday paradox", on a 1000 node - * network the probability of collision would be - * 0.000116292153. On a 10,000 node network, the probability - * of collision would be 0.01157288998621678766. - */ - -VOID GenerateRandomMac (MACADDR mac, const unsigned char *adapter_name) -{ - unsigned const char *cp = adapter_name; - unsigned char c; - unsigned int i = 2; - unsigned int byte = 0; - int brace = 0; - int state = 0; - - CLEAR_MAC (mac); - - mac[0] = 0x00; - mac[1] = 0xFF; - - while (c = *cp++) - { - if (i >= sizeof (MACADDR)) - break; - if (c == '{') - brace = 1; - if (IsHexDigit (c) && brace) - { - const unsigned int digit = HexStringToDecimalInt (c); - if (state) - { - byte <<= 4; - byte |= digit; - mac[i++] = (unsigned char) byte; - state = 0; - } - else - { - byte = digit; - state = 1; - } - } - } -} - -VOID GenerateRelatedMAC (MACADDR dest, const MACADDR src, const int delta) -{ - COPY_MAC (dest, src); - dest[2] += (UCHAR) delta; -} |