/[mac2eui64]/trunk/mac2eui64.c
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Contents of /trunk/mac2eui64.c

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Revision 4 - (show annotations) (download)
2015-09-29T08:31:02Z (7 years, 4 months ago) by trond
Content type: text/plain
File size: 8801 byte(s)
Changed the email address.
Changed from gcc to clang36.
Updated to code to reflect current standards.

1 /*
2 mac2eui64.c
3
4 Conversion from the IEEE 802 MAC format to the IEEE EUI-64 format.
5 Displays values suitable for use as a 64 bit interface ID in A6 RRs.
6 Also displayed are labels suitable for use with PTR RRs in the
7 reverse zone ip6.arpa.
8
9 Updated in 2015 to conform to ISO C 2011.
10
11 Copyright (C) 2003 Trond Endrestøl <Trond.Endrestol@ximalas.info>
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26
27 $Ximalas$
28 */
29 #include <ctype.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33
34 void Usage(const char * const argv0, int ReturnValue) __attribute__((noreturn));
35 void Version(const char * const argv0) __attribute__((noreturn));
36 void TransformMAC(const char * const argv0, const char * const argvi);
37
38 int main(int argc, char **argv)
39 {
40 int c;
41 ssize_t i;
42
43 opterr = 0;
44 while ((c = getopt(argc, argv, "hv")) != -1) {
45 switch (c) {
46 case 'h':
47 Usage(argv[0], EXIT_SUCCESS);
48 //break;
49
50 case 'v':
51 Version(argv[0]);
52 //break;
53
54 case '?':
55 fprintf(stderr, "%s: invalid option -%c\n", argv[0], optopt);
56 break;
57
58 default:
59 fprintf(stderr, "%s: something is dead wrong with getopt() or with this program\n", argv[0]);
60 return EXIT_FAILURE;
61 //break;
62 }
63 }
64
65 i = optind;
66
67 if (i == argc)
68 Usage(argv[0], EXIT_FAILURE);
69
70 TransformMAC(argv[0], argv[i++]);
71
72 while (i < argc) {
73 puts("");
74 TransformMAC(argv[0], argv[i++]);
75 }
76
77 return EXIT_SUCCESS;
78 } /* main() */
79
80 void Usage(const char * const argv0, int ReturnValue)
81 {
82 fprintf((ReturnValue == EXIT_SUCCESS) ? stdout : stderr,
83 "Usage: %s [-h | -v | <macaddress1> [macaddress2] ... [macaddressN]]\n\n"
84
85 "Options:\n"
86 "-h show this help\n"
87 "-v display version and copyright\n\n"
88
89 "MAC addresses must consist of 12 hex digits with leading zeroes.\n"
90 "Any punctuation is ignored. Examples of valid MAC addresses:\n\n"
91
92 " 00:50:DA:2C:8F:55\n"
93 " 00-50-DA-2C-8F-55\n"
94 " 0050.DA2C.8F55\n"
95 " 0050DA2C8F55\n",
96 argv0);
97 exit(ReturnValue);
98 } /* Usage() */
99
100 void Version(const char * const argv0)
101 {
102 printf("%s version 1.0\n\n"
103
104 "Conversion from the IEEE 802 MAC format to the IEEE EUI-64 format.\n"
105 "Displays values suitable for use as a 64 bit interface ID in A6 RRs.\n"
106 "Also displayed are labels suitable for use with PTR RRs in the\n"
107 "reverse zone ip6.arpa.\n\n"
108
109 "Updated in 2015 to conform to ISO C 2011.\n\n"
110
111 "Copyright (C) 2003 Trond Endrestøl <Trond.Endrestol@ximalas.info>\n\n"
112
113 "This program is free software; you can redistribute it and/or modify\n"
114 "it under the terms of the GNU General Public License as published by\n"
115 "the Free Software Foundation; either version 2 of the License, or\n"
116 "(at your option) any later version.\n\n"
117
118 "This program is distributed in the hope that it will be useful,\n"
119 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
120 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
121 "GNU General Public License for more details.\n\n"
122
123 "You should have received a copy of the GNU General Public License\n"
124 "along with this program; if not, write to the Free Software\n"
125 "Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.\n",
126 argv0);
127
128 exit(EXIT_SUCCESS);
129 } /* Version */
130
131 int ConstructMAC(const char *argvi, unsigned char *MAC);
132 void ConstructEUI64(const unsigned char * const MAC, unsigned char * const EUI64);
133 void InvertUniversalLocalBit(unsigned char * const EUI64);
134
135 void PrintMAC(const unsigned char * const MAC);
136 void PrintEUI64(const unsigned char * const EUI64);
137 void PrintEUI64_InterfaceID(const unsigned char * const EUI64);
138 void PrintEUI64_IP6_ARPA(const unsigned char * const EUI64);
139 //void PrintEUI64_IP6_INT(const unsigned char * const EUI64);
140
141 void TransformMAC(const char * const argv0, const char * const argvi)
142 {
143 unsigned char MAC[6], EUI64[8];
144
145 if (ConstructMAC(argvi, MAC)) {
146 fprintf(stderr, "%s: invalid MAC address: %s\n", argv0, argvi);
147 return;
148 }
149
150 ConstructEUI64(MAC, EUI64);
151
152 PrintMAC(MAC);
153 PrintEUI64(EUI64);
154
155 /* Transform the EUI-64 address into
156 the Modified EUI-64 address for use as
157 the value for the interface ID */
158 InvertUniversalLocalBit(EUI64);
159
160 PrintEUI64_InterfaceID(EUI64);
161 PrintEUI64_IP6_ARPA(EUI64);
162 //PrintEUI64_IP6_INT(EUI64);
163 } /* TransformMAC() */
164
165 int ConstructMAC(const char *argvi, unsigned char * MAC)
166 {
167 unsigned char ConstructHexByte(unsigned char MSNybble, unsigned char LSNybble);
168
169 int ReturnValue = EXIT_SUCCESS, NumDigits = 0;
170 size_t i = 0;
171 unsigned char MSNybble, LSNybble;
172
173 while (*argvi) {
174 if (isxdigit(*argvi)) {
175 NumDigits++;
176 MSNybble = (unsigned char)*argvi++;
177
178 if (!isxdigit(*argvi)) {
179 break;
180 }
181
182 NumDigits++;
183 LSNybble = (unsigned char)*argvi;
184
185 MAC[i++] = ConstructHexByte(MSNybble, LSNybble);
186 }
187
188 argvi++;
189 }
190
191 if (NumDigits != 12)
192 ReturnValue = EXIT_FAILURE;
193
194 return ReturnValue;
195 } /* ConstructMAC() */
196
197 unsigned char ConstructHexByte(unsigned char MSNybble, unsigned char LSNybble);
198
199 unsigned char ConstructHexByte(unsigned char MSNybble, unsigned char LSNybble)
200 {
201 unsigned char Byte;
202
203 MSNybble = (unsigned char)toupper(MSNybble);
204 LSNybble = (unsigned char)toupper(LSNybble);
205
206 if (MSNybble >= 'A') {
207 MSNybble = 0x0A + MSNybble - 'A';
208 }
209 else {
210 MSNybble -= '0';
211 }
212
213 if (LSNybble >= 'A') {
214 LSNybble = 0x0A + LSNybble - 'A';
215 }
216 else {
217 LSNybble -= '0';
218 }
219
220 Byte = (unsigned char)((MSNybble << 4) | LSNybble);
221
222 return Byte;
223 } /* ConstructHexByte() */
224
225 void ConstructEUI64(const unsigned char * const MAC, unsigned char * const EUI64)
226 {
227 EUI64[0] = MAC[0];
228 EUI64[1] = MAC[1];
229 EUI64[2] = MAC[2];
230 EUI64[3] = 0xFF;
231 EUI64[4] = 0xFE;
232 EUI64[5] = MAC[3];
233 EUI64[6] = MAC[4];
234 EUI64[7] = MAC[5];
235 } /* ConstructEUI64() */
236
237 void InvertUniversalLocalBit(unsigned char * const EUI64)
238 {
239 if (EUI64[0] & 0x02)
240 EUI64[0] &= ~0x02;
241 else
242 EUI64[0] |= 0x02;
243 } /* InvertUniversalLocalBit() */
244
245 void PrintMAC(const unsigned char * const MAC)
246 {
247 printf("MAC:\t\t%02X:%02X:%02X:%02X:%02X:%02X\n",
248 MAC[0], MAC[1], MAC[2], MAC[3], MAC[4], MAC[5]);
249 } /* PrintMAC() */
250
251 void PrintEUI64(const unsigned char * const EUI64)
252 {
253 printf("EUI-64:\t\t%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
254 EUI64[0], EUI64[1], EUI64[2], EUI64[3],
255 EUI64[4], EUI64[5], EUI64[6], EUI64[7]);
256 } /* PrintEUI64() */
257
258 void PrintEUI64_InterfaceID(const unsigned char * const EUI64)
259 {
260 printf("Interface ID:\t::%02x%02x:%02x%02x:%02x%02x:%02x%02x\n",
261 EUI64[0], EUI64[1], EUI64[2], EUI64[3],
262 EUI64[4], EUI64[5], EUI64[6], EUI64[7]);
263 } /* PrintEUI64_InterfaceID() */
264
265 void PrintEUI64_IP6_ARPA(const unsigned char * const EUI64)
266 {
267 // printf("ip6.arpa:\t\\[x%02X%02X%02X%02X%02X%02X%02X%02X/64]\n",
268 // EUI64[0], EUI64[1], EUI64[2], EUI64[3],
269 // EUI64[4], EUI64[5], EUI64[6], EUI64[7]);
270
271 printf("ip6.arpa/64:\t%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x\n",
272 EUI64[7] & 0x0F, EUI64[7] >> 4,
273 EUI64[6] & 0x0F, EUI64[6] >> 4,
274 EUI64[5] & 0x0F, EUI64[5] >> 4,
275 EUI64[4] & 0x0F, EUI64[4] >> 4,
276 EUI64[3] & 0x0F, EUI64[3] >> 4,
277 EUI64[2] & 0x0F, EUI64[2] >> 4,
278 EUI64[1] & 0x0F, EUI64[1] >> 4,
279 EUI64[0] & 0x0F, EUI64[0] >> 4);
280 } /* PrintEUI64_IP6_ARPA() */
281
282 //void PrintEUI64_IP6_INT(const unsigned char * const EUI64)
283 //{
284 // printf("ip6.int/64:\t%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x\n",
285 // EUI64[7] & 0x0F, EUI64[7] >> 4,
286 // EUI64[6] & 0x0F, EUI64[6] >> 4,
287 // EUI64[5] & 0x0F, EUI64[5] >> 4,
288 // EUI64[4] & 0x0F, EUI64[4] >> 4,
289 // EUI64[3] & 0x0F, EUI64[3] >> 4,
290 // EUI64[2] & 0x0F, EUI64[2] >> 4,
291 // EUI64[1] & 0x0F, EUI64[1] >> 4,
292 // EUI64[0] & 0x0F, EUI64[0] >> 4);
293 //} /* PrintEUI64_IP6_INT() */
294
295 /* mac2eui64.c */

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