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trond |
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/* |
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mac2eui64.c |
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Conversion from the IEEE 802 MAC format to the IEEE EUI-64 format. |
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Displays values suitable for use as a 64 bit interface ID in A6 RRs. |
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Also displayed are labels suitable for use with PTR RRs in the |
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two defined reverse zones ip6.arpa (A6) and ip6.int (AAAA). |
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Copyright (C) 2003 Trond Endrestøl <trond@ramstind.gtf.ol.no> |
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This program 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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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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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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$Ximalas$ |
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*/ |
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#include <ctype.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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int main(int argc, char **argv) |
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{ |
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void Usage(const char * const argv0, int ReturnValue); |
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void Version(const char * const argv0); |
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void TransformMAC(const char * const argv0, const char * const argvi); |
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int c; |
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size_t i; |
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opterr = 0; |
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while ((c = getopt(argc, argv, "hv")) != -1) { |
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switch (c) { |
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case 'h': |
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Usage(argv[0], EXIT_SUCCESS); |
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break; |
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case 'v': |
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Version(argv[0]); |
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break; |
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case '?': |
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fprintf(stderr, "%s: invalid option -%c\n", argv[0], optopt); |
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break; |
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default: |
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fprintf(stderr, "%s: something is dead wrong with getopt() or with this program\n", argv[0]); |
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return EXIT_FAILURE; |
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break; |
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} |
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} |
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i = optind; |
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if (i == argc) |
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Usage(argv[0], EXIT_FAILURE); |
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TransformMAC(argv[0], argv[i++]); |
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while (i < argc) { |
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puts(""); |
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TransformMAC(argv[0], argv[i++]); |
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} |
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return EXIT_SUCCESS; |
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} /* main() */ |
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void Usage(const char * const argv0, int ReturnValue) |
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{ |
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fprintf((ReturnValue == EXIT_SUCCESS) ? stdout : stderr, |
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"Usage: %s [-h | -v | <macaddress1> [macaddress2] ... [macaddressN]]\n\n" |
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"Options:\n" |
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"-h show this help\n" |
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"-v display version and copyright\n\n" |
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"MAC addresses must consist of 12 hex digits with leading zeroes.\n" |
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"Any punctuation is ignored. Examples of valid MAC addresses:\n\n" |
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" 00:50:DA:2C:8F:55\n" |
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" 00-50-DA-2C-8F-55\n" |
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" 0050.DA2C.8F55\n" |
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" 0050DA2C8F55\n", |
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argv0); |
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exit(ReturnValue); |
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} /* Usage() */ |
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void Version(const char * const argv0) |
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{ |
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printf("%s version 1.0\n\n" |
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"Conversion from the IEEE 802 MAC format to the IEEE EUI-64 format.\n" |
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"Displays values suitable for use as a 64 bit interface ID in A6 RRs.\n" |
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"Also displayed are labels suitable for use with PTR RRs in the\n" |
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"two defined reverse zones ip6.arpa (A6) and ip6.int (AAAA).\n\n" |
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"Copyright (C) 2003 Trond Endrestøl <trond@ramstind.gtf.ol.no>\n\n" |
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"This program is free software; you can redistribute it and/or modify\n" |
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"it under the terms of the GNU General Public License as published by\n" |
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"the Free Software Foundation; either version 2 of the License, or\n" |
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"(at your option) any later version.\n\n" |
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"This program is distributed in the hope that it will be useful,\n" |
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"but WITHOUT ANY WARRANTY; without even the implied warranty of\n" |
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"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" |
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"GNU General Public License for more details.\n\n" |
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"You should have received a copy of the GNU General Public License\n" |
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"along with this program; if not, write to the Free Software\n" |
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"Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.\n", |
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argv0); |
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exit(EXIT_SUCCESS); |
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} /* Version */ |
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void TransformMAC(const char * const argv0, const char * const argvi) |
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{ |
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int ConstructMAC(const char *argvi, unsigned char *MAC); |
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void ConstructEUI64(const unsigned char * const MAC, unsigned char * const EUI64); |
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void InvertUniversalLocalBit(unsigned char * const EUI64); |
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void PrintMAC(const unsigned char * const MAC); |
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void PrintEUI64(const unsigned char * const EUI64); |
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void PrintEUI64_InterfaceID(const unsigned char * const EUI64); |
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void PrintEUI64_IP6_INT(const unsigned char * const EUI64); |
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void PrintEUI64_IP6_ARPA(const unsigned char * const EUI64); |
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unsigned char MAC[6], EUI64[8]; |
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if (ConstructMAC(argvi, MAC)) { |
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fprintf(stderr, "%s: invalid MAC address: %s\n", argv0, argvi); |
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return; |
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} |
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ConstructEUI64(MAC, EUI64); |
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PrintMAC(MAC); |
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PrintEUI64(EUI64); |
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/* Transform the EUI-64 address into |
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the Modified EUI-64 address for use as |
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the value for the interface ID */ |
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InvertUniversalLocalBit(EUI64); |
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PrintEUI64_InterfaceID(EUI64); |
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PrintEUI64_IP6_INT(EUI64); |
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PrintEUI64_IP6_ARPA(EUI64); |
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} /* TransformMAC() */ |
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int ConstructMAC(const char *argvi, unsigned char * MAC) |
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{ |
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unsigned char ConstructHexByte(unsigned char MSNybble, unsigned char LSNybble); |
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int ReturnValue = EXIT_SUCCESS, NumDigits = 0; |
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size_t i = 0; |
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unsigned char MSNybble, LSNybble; |
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while (*argvi) { |
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if (isxdigit(*argvi)) { |
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NumDigits++; |
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MSNybble = *argvi++; |
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if (!isxdigit(*argvi)) { |
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break; |
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} |
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NumDigits++; |
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LSNybble = *argvi; |
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MAC[i++] = ConstructHexByte(MSNybble, LSNybble); |
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} |
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argvi++; |
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} |
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if (NumDigits != 12) |
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ReturnValue = EXIT_FAILURE; |
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return ReturnValue; |
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} /* ConstructMAC() */ |
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unsigned char ConstructHexByte(unsigned char MSNybble, unsigned char LSNybble) |
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{ |
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unsigned char Byte; |
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MSNybble = toupper(MSNybble); |
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LSNybble = toupper(LSNybble); |
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if (MSNybble >= 'A') { |
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MSNybble = 0x0A + MSNybble - 'A'; |
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} |
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else { |
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MSNybble -= '0'; |
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} |
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if (LSNybble >= 'A') { |
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LSNybble = 0x0A + LSNybble - 'A'; |
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} |
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else { |
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LSNybble -= '0'; |
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} |
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Byte = (MSNybble << 4) | LSNybble; |
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return Byte; |
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} /* ConstructHexByte() */ |
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void ConstructEUI64(const unsigned char * const MAC, unsigned char * const EUI64) |
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{ |
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EUI64[0] = MAC[0]; |
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EUI64[1] = MAC[1]; |
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EUI64[2] = MAC[2]; |
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EUI64[3] = 0xFF; |
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EUI64[4] = 0xFE; |
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EUI64[5] = MAC[3]; |
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EUI64[6] = MAC[4]; |
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EUI64[7] = MAC[5]; |
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} /* ConstructEUI64() */ |
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void InvertUniversalLocalBit(unsigned char * const EUI64) |
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{ |
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if (EUI64[0] & 0x02) |
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EUI64[0] &= ~0x02; |
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else |
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EUI64[0] |= 0x02; |
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} /* InvertUniversalLocalBit() */ |
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void PrintMAC(const unsigned char * const MAC) |
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{ |
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printf("MAC:\t\t%02X:%02X:%02X:%02X:%02X:%02X\n", |
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MAC[0], MAC[1], MAC[2], MAC[3], MAC[4], MAC[5]); |
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} /* PrintMAC() */ |
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void PrintEUI64(const unsigned char * const EUI64) |
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{ |
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printf("EUI-64:\t\t%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n", |
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EUI64[0], EUI64[1], EUI64[2], EUI64[3], |
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EUI64[4], EUI64[5], EUI64[6], EUI64[7]); |
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} /* PrintEUI64() */ |
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void PrintEUI64_InterfaceID(const unsigned char * const EUI64) |
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{ |
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printf("Interface ID:\t::%02x%02x:%02x%02x:%02x%02x:%02x%02x\n", |
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EUI64[0], EUI64[1], EUI64[2], EUI64[3], |
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EUI64[4], EUI64[5], EUI64[6], EUI64[7]); |
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} /* PrintEUI64_InterfaceID() */ |
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void PrintEUI64_IP6_INT(const unsigned char * const EUI64) |
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{ |
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printf("ip6.int/64:\t%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x\n", |
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EUI64[7] & 0x0F, EUI64[7] >> 4, |
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EUI64[6] & 0x0F, EUI64[6] >> 4, |
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EUI64[5] & 0x0F, EUI64[5] >> 4, |
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EUI64[4] & 0x0F, EUI64[4] >> 4, |
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EUI64[3] & 0x0F, EUI64[3] >> 4, |
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EUI64[2] & 0x0F, EUI64[2] >> 4, |
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EUI64[1] & 0x0F, EUI64[1] >> 4, |
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EUI64[0] & 0x0F, EUI64[0] >> 4); |
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} /* PrintEUI64_IP6_INT() */ |
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void PrintEUI64_IP6_ARPA(const unsigned char * const EUI64) |
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{ |
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printf("ip6.arpa:\t\\[x%02X%02X%02X%02X%02X%02X%02X%02X/64]\n", |
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EUI64[0], EUI64[1], EUI64[2], EUI64[3], |
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EUI64[4], EUI64[5], EUI64[6], EUI64[7]); |
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} /* PrintEUI64_IP6_ARPA() */ |
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/* mac2eui64.c */ |