1 /* 2 * Copyright 2004 The Aerospace Corporation. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions, and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of The Aerospace Corporation may not be used to endorse or 14 * promote products derived from this software. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * Copyright (c) 1995 29 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 30 * 31 * Redistribution and use in source and binary forms, with or without 32 * modification, are permitted provided that the following conditions 33 * are met: 34 * 1. Redistributions of source code must retain the above copyright 35 * notice, this list of conditions and the following disclaimer. 36 * 2. Redistributions in binary form must reproduce the above copyright 37 * notice, this list of conditions and the following disclaimer in the 38 * documentation and/or other materials provided with the distribution. 39 * 3. All advertising materials mentioning features or use of this software 40 * must display the following acknowledgement: 41 * This product includes software developed by Bill Paul. 42 * 4. Neither the name of the author nor the names of any co-contributors 43 * may be used to endorse or promote products derived from this software 44 * without specific prior written permission. 45 * 46 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 * 58 * EUI-64 conversion and lookup routines 59 * 60 * 61 * Converted from ether_addr.c rev 62 * FreeBSD: src/lib/libc/net/eui64.c,v 1.15 2002/04/08 07:51:10 ru Exp 63 * by Brooks Davis 64 * 65 * Written by Bill Paul <wpaul@ctr.columbia.edu> 66 * Center for Telecommunications Research 67 * Columbia University, New York City 68 */ 69 70 #include <sys/cdefs.h> 71 __FBSDID("$FreeBSD$"); 72 73 #include <stdio.h> 74 #include <paths.h> 75 #include <sys/param.h> 76 #include <sys/eui64.h> 77 #include <string.h> 78 #include <stdlib.h> 79 #ifdef YP 80 #include <rpc/rpc.h> 81 #include <rpcsvc/yp_prot.h> 82 #include <rpcsvc/ypclnt.h> 83 #endif 84 85 #ifndef _PATH_EUI64 86 #define _PATH_EUI64 "/etc/eui64" 87 #endif 88 89 static int eui64_line(const char *l, struct eui64 *e, char *hostname, 90 size_t len); 91 92 /* 93 * Parse a string of text containing an EUI-64 and hostname 94 * and separate it into its component parts. 95 */ 96 static int 97 eui64_line(const char *l, struct eui64 *e, char *hostname, size_t len) 98 { 99 char *line, *linehead, *cur; 100 101 linehead = strdup(l); 102 if (linehead == NULL) 103 return (-1); 104 line = linehead; 105 106 /* Find and parse the EUI64 */ 107 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 108 if (*cur != '\0') { 109 if (eui64_aton(cur, e) == 0) 110 break; 111 else 112 goto bad; 113 } 114 } 115 116 /* Find the hostname */ 117 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 118 if (*cur != '\0') { 119 if (strlcpy(hostname, cur, len) <= len) 120 break; 121 else 122 goto bad; 123 } 124 } 125 126 /* Make sure what remains is either whitespace or a comment */ 127 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 128 if (*cur == '#') 129 break; 130 if (*cur != '\0') 131 goto bad; 132 } 133 134 free(linehead); 135 return (0); 136 137 bad: 138 free(linehead); 139 return (-1); 140 } 141 142 /* 143 * Convert an ASCII representation of an EUI-64 to binary form. 144 */ 145 int 146 eui64_aton(const char *a, struct eui64 *e) 147 { 148 int i; 149 unsigned int o0, o1, o2, o3, o4, o5, o6, o7; 150 151 /* canonical form */ 152 i = sscanf(a, "%x-%x-%x-%x-%x-%x-%x-%x", 153 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 154 if (i == EUI64_LEN) 155 goto good; 156 /* ethernet form */ 157 i = sscanf(a, "%x:%x:%x:%x:%x:%x:%x:%x", 158 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 159 if (i == EUI64_LEN) 160 goto good; 161 /* classic fwcontrol/dconschat form */ 162 i = sscanf(a, "0x%2x%2x%2x%2x%2x%2x%2x%2x", 163 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 164 if (i == EUI64_LEN) 165 goto good; 166 /* MAC format (-) */ 167 i = sscanf(a, "%x-%x-%x-%x-%x-%x", 168 &o0, &o1, &o2, &o5, &o6, &o7); 169 if (i == 6) { 170 o3 = 0xff; 171 o4 = 0xfe; 172 goto good; 173 } 174 /* MAC format (:) */ 175 i = sscanf(a, "%x:%x:%x:%x:%x:%x", 176 &o0, &o1, &o2, &o5, &o6, &o7); 177 if (i == 6) { 178 o3 = 0xff; 179 o4 = 0xfe; 180 goto good; 181 } 182 183 return (-1); 184 185 good: 186 e->octet[0]=o0; 187 e->octet[1]=o1; 188 e->octet[2]=o2; 189 e->octet[3]=o3; 190 e->octet[4]=o4; 191 e->octet[5]=o5; 192 e->octet[6]=o6; 193 e->octet[7]=o7; 194 195 return (0); 196 } 197 198 /* 199 * Convert a binary representation of an EUI-64 to an ASCII string. 200 */ 201 int 202 eui64_ntoa(const struct eui64 *id, char *a, size_t len) 203 { 204 int i; 205 206 i = snprintf(a, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x", 207 id->octet[0], id->octet[1], id->octet[2], id->octet[3], 208 id->octet[4], id->octet[5], id->octet[6], id->octet[7]); 209 if (i < 23 || i >= len) 210 return (-1); 211 return (0); 212 } 213 214 /* 215 * Map an EUI-64 to a hostname. Use either /etc/eui64 or NIS/YP. 216 */ 217 int 218 eui64_ntohost(char *hostname, size_t len, const struct eui64 *id) 219 { 220 FILE *fp; 221 char buf[BUFSIZ + 2]; 222 struct eui64 local_eui64; 223 char local_host[MAXHOSTNAMELEN]; 224 #ifdef YP 225 char *result; 226 int resultlen; 227 char eui64_a[24]; 228 char *yp_domain; 229 #endif 230 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 231 return (1); 232 233 while (fgets(buf,BUFSIZ,fp)) { 234 if (buf[0] == '#') 235 continue; 236 #ifdef YP 237 if (buf[0] == '+') { 238 if (yp_get_default_domain(&yp_domain)) 239 continue; 240 eui64_ntoa(id, eui64_a, sizeof(eui64_a)); 241 if (yp_match(yp_domain, "eui64.byid", eui64_a, 242 strlen(eui64_a), &result, &resultlen)) { 243 continue; 244 } 245 strncpy(buf, result, resultlen); 246 buf[resultlen] = '\0'; 247 free(result); 248 } 249 #endif 250 if (eui64_line(buf, &local_eui64, local_host, 251 sizeof(local_host)) == 0) { 252 if (bcmp(&local_eui64.octet[0], 253 &id->octet[0], EUI64_LEN) == 0) { 254 /* We have a match */ 255 strcpy(hostname, local_host); 256 fclose(fp); 257 return(0); 258 } 259 } 260 } 261 fclose(fp); 262 return (1); 263 } 264 265 /* 266 * Map a hostname to an EUI-64 using /etc/eui64 or NIS/YP. 267 */ 268 int 269 eui64_hostton(const char *hostname, struct eui64 *id) 270 { 271 FILE *fp; 272 char buf[BUFSIZ + 2]; 273 struct eui64 local_eui64; 274 char local_host[MAXHOSTNAMELEN]; 275 #ifdef YP 276 char *result; 277 int resultlen; 278 char *yp_domain; 279 #endif 280 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 281 return (1); 282 283 while (fgets(buf,BUFSIZ,fp)) { 284 if (buf[0] == '#') 285 continue; 286 #ifdef YP 287 if (buf[0] == '+') { 288 if (yp_get_default_domain(&yp_domain)) 289 continue; 290 if (yp_match(yp_domain, "eui64.byname", hostname, 291 strlen(hostname), &result, &resultlen)) { 292 continue; 293 } 294 strncpy(buf, result, resultlen); 295 buf[resultlen] = '\0'; 296 free(result); 297 } 298 #endif 299 if (eui64_line(buf, &local_eui64, local_host, 300 sizeof(local_host)) == 0) { 301 if (strcmp(hostname, local_host) == 0) { 302 /* We have a match */ 303 bcopy(&local_eui64, id, sizeof(struct eui64)); 304 fclose(fp); 305 return(0); 306 } 307 } 308 } 309 fclose(fp); 310 return (1); 311 } 312