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/types.h> 76 #include <sys/eui64.h> 77 #include <string.h> 78 #include <stdlib.h> 79 #include <sys/param.h> 80 #ifdef YP 81 #include <rpc/rpc.h> 82 #include <rpcsvc/yp_prot.h> 83 #include <rpcsvc/ypclnt.h> 84 #endif 85 86 #ifndef _PATH_EUI64 87 #define _PATH_EUI64 "/etc/eui64" 88 #endif 89 90 static int eui64_line(const char *l, struct eui64 *e, char *hostname, 91 size_t len); 92 93 /* 94 * Parse a string of text containing an EUI-64 and hostname 95 * and separate it into its component parts. 96 */ 97 static int 98 eui64_line(const char *l, struct eui64 *e, char *hostname, size_t len) 99 { 100 char *line, *linehead, *cur; 101 102 linehead = strdup(l); 103 if (linehead == NULL) 104 return (-1); 105 line = linehead; 106 107 /* Find and parse the EUI64 */ 108 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 109 if (*cur != '\0') { 110 if (eui64_aton(cur, e) == 0) 111 break; 112 else 113 goto bad; 114 } 115 } 116 117 /* Find the hostname */ 118 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 119 if (*cur != '\0') { 120 if (strlcpy(hostname, cur, len) <= len) 121 break; 122 else 123 goto bad; 124 } 125 } 126 127 /* Make sure what remains is either whitespace or a comment */ 128 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 129 if (*cur == '#') 130 break; 131 if (*cur != '\0') 132 goto bad; 133 } 134 135 free(linehead); 136 return (0); 137 138 bad: 139 free(linehead); 140 return (-1); 141 } 142 143 /* 144 * Convert an ASCII representation of an EUI-64 to binary form. 145 */ 146 int 147 eui64_aton(const char *a, struct eui64 *e) 148 { 149 int i; 150 unsigned int o0, o1, o2, o3, o4, o5, o6, o7; 151 152 /* canonical form */ 153 i = sscanf(a, "%x-%x-%x-%x-%x-%x-%x-%x", 154 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 155 if (i == EUI64_LEN) 156 goto good; 157 /* ethernet form */ 158 i = sscanf(a, "%x:%x:%x:%x:%x:%x:%x:%x", 159 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 160 if (i == EUI64_LEN) 161 goto good; 162 /* classic fwcontrol/dconschat form */ 163 i = sscanf(a, "0x%2x%2x%2x%2x%2x%2x%2x%2x", 164 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 165 if (i == EUI64_LEN) 166 goto good; 167 /* MAC format (-) */ 168 i = sscanf(a, "%x-%x-%x-%x-%x-%x", 169 &o0, &o1, &o2, &o5, &o6, &o7); 170 if (i == 6) { 171 o3 = 0xff; 172 o4 = 0xfe; 173 goto good; 174 } 175 /* MAC format (:) */ 176 i = sscanf(a, "%x:%x:%x:%x:%x:%x", 177 &o0, &o1, &o2, &o5, &o6, &o7); 178 if (i == 6) { 179 o3 = 0xff; 180 o4 = 0xfe; 181 goto good; 182 } 183 184 return (-1); 185 186 good: 187 e->octet[0]=o0; 188 e->octet[1]=o1; 189 e->octet[2]=o2; 190 e->octet[3]=o3; 191 e->octet[4]=o4; 192 e->octet[5]=o5; 193 e->octet[6]=o6; 194 e->octet[7]=o7; 195 196 return (0); 197 } 198 199 /* 200 * Convert a binary representation of an EUI-64 to an ASCII string. 201 */ 202 int 203 eui64_ntoa(const struct eui64 *id, char *a, size_t len) 204 { 205 int i; 206 207 i = snprintf(a, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x", 208 id->octet[0], id->octet[1], id->octet[2], id->octet[3], 209 id->octet[4], id->octet[5], id->octet[6], id->octet[7]); 210 if (i < 23 || i >= len) 211 return (-1); 212 return (0); 213 } 214 215 /* 216 * Map an EUI-64 to a hostname. Use either /etc/eui64 or NIS/YP. 217 */ 218 int 219 eui64_ntohost(char *hostname, size_t len, const struct eui64 *id) 220 { 221 FILE *fp; 222 char buf[BUFSIZ + 2]; 223 struct eui64 local_eui64; 224 char local_host[MAXHOSTNAMELEN]; 225 #ifdef YP 226 char *result; 227 int resultlen; 228 char eui64_a[24]; 229 char *yp_domain; 230 #endif 231 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 232 return (1); 233 234 while (fgets(buf,BUFSIZ,fp)) { 235 if (buf[0] == '#') 236 continue; 237 #ifdef YP 238 if (buf[0] == '+') { 239 if (yp_get_default_domain(&yp_domain)) 240 continue; 241 eui64_ntoa(id, eui64_a, sizeof(eui64_a)); 242 if (yp_match(yp_domain, "eui64.byid", eui64_a, 243 strlen(eui64_a), &result, &resultlen)) { 244 continue; 245 } 246 strncpy(buf, result, resultlen); 247 buf[resultlen] = '\0'; 248 free(result); 249 } 250 #endif 251 if (eui64_line(buf, &local_eui64, local_host, 252 sizeof(local_host)) == 0) { 253 if (bcmp(&local_eui64.octet[0], 254 &id->octet[0], EUI64_LEN) == 0) { 255 /* We have a match */ 256 strcpy(hostname, local_host); 257 fclose(fp); 258 return(0); 259 } 260 } 261 } 262 fclose(fp); 263 return (1); 264 } 265 266 /* 267 * Map a hostname to an EUI-64 using /etc/eui64 or NIS/YP. 268 */ 269 int 270 eui64_hostton(const char *hostname, struct eui64 *id) 271 { 272 FILE *fp; 273 char buf[BUFSIZ + 2]; 274 struct eui64 local_eui64; 275 char local_host[MAXHOSTNAMELEN]; 276 #ifdef YP 277 char *result; 278 int resultlen; 279 char *yp_domain; 280 #endif 281 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 282 return (1); 283 284 while (fgets(buf,BUFSIZ,fp)) { 285 if (buf[0] == '#') 286 continue; 287 #ifdef YP 288 if (buf[0] == '+') { 289 if (yp_get_default_domain(&yp_domain)) 290 continue; 291 if (yp_match(yp_domain, "eui64.byname", hostname, 292 strlen(hostname), &result, &resultlen)) { 293 continue; 294 } 295 strncpy(buf, result, resultlen); 296 buf[resultlen] = '\0'; 297 free(result); 298 } 299 #endif 300 if (eui64_line(buf, &local_eui64, local_host, 301 sizeof(local_host)) == 0) { 302 if (strcmp(hostname, local_host) == 0) { 303 /* We have a match */ 304 bcopy(&local_eui64, id, sizeof(struct eui64)); 305 fclose(fp); 306 return(0); 307 } 308 } 309 } 310 fclose(fp); 311 return (1); 312 } 313