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 #include <stdio.h> 72 #include <paths.h> 73 #include <sys/param.h> 74 #include <sys/eui64.h> 75 #include <string.h> 76 #include <stdlib.h> 77 #ifdef YP 78 #include <rpc/rpc.h> 79 #include <rpcsvc/yp_prot.h> 80 #include <rpcsvc/ypclnt.h> 81 #endif 82 83 #ifndef _PATH_EUI64 84 #define _PATH_EUI64 "/etc/eui64" 85 #endif 86 87 static int eui64_line(const char *l, struct eui64 *e, char *hostname, 88 size_t len); 89 90 /* 91 * Parse a string of text containing an EUI-64 and hostname 92 * and separate it into its component parts. 93 */ 94 static int 95 eui64_line(const char *l, struct eui64 *e, char *hostname, size_t len) 96 { 97 char *line, *linehead, *cur; 98 99 linehead = strdup(l); 100 if (linehead == NULL) 101 return (-1); 102 line = linehead; 103 104 /* Find and parse the EUI64 */ 105 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 106 if (*cur != '\0') { 107 if (eui64_aton(cur, e) == 0) 108 break; 109 else 110 goto bad; 111 } 112 } 113 114 /* Find the hostname */ 115 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 116 if (*cur != '\0') { 117 if (strlcpy(hostname, cur, len) <= len) 118 break; 119 else 120 goto bad; 121 } 122 } 123 124 /* Make sure what remains is either whitespace or a comment */ 125 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 126 if (*cur == '#') 127 break; 128 if (*cur != '\0') 129 goto bad; 130 } 131 132 free(linehead); 133 return (0); 134 135 bad: 136 free(linehead); 137 return (-1); 138 } 139 140 /* 141 * Convert an ASCII representation of an EUI-64 to binary form. 142 */ 143 int 144 eui64_aton(const char *a, struct eui64 *e) 145 { 146 int i; 147 unsigned int o0, o1, o2, o3, o4, o5, o6, o7; 148 149 /* canonical form */ 150 i = sscanf(a, "%x-%x-%x-%x-%x-%x-%x-%x", 151 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 152 if (i == EUI64_LEN) 153 goto good; 154 /* ethernet form */ 155 i = sscanf(a, "%x:%x:%x:%x:%x:%x:%x:%x", 156 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 157 if (i == EUI64_LEN) 158 goto good; 159 /* classic fwcontrol/dconschat form */ 160 i = sscanf(a, "0x%2x%2x%2x%2x%2x%2x%2x%2x", 161 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 162 if (i == EUI64_LEN) 163 goto good; 164 /* MAC format (-) */ 165 i = sscanf(a, "%x-%x-%x-%x-%x-%x", 166 &o0, &o1, &o2, &o5, &o6, &o7); 167 if (i == 6) { 168 o3 = 0xff; 169 o4 = 0xfe; 170 goto good; 171 } 172 /* MAC format (:) */ 173 i = sscanf(a, "%x:%x:%x:%x:%x:%x", 174 &o0, &o1, &o2, &o5, &o6, &o7); 175 if (i == 6) { 176 o3 = 0xff; 177 o4 = 0xfe; 178 goto good; 179 } 180 181 return (-1); 182 183 good: 184 e->octet[0]=o0; 185 e->octet[1]=o1; 186 e->octet[2]=o2; 187 e->octet[3]=o3; 188 e->octet[4]=o4; 189 e->octet[5]=o5; 190 e->octet[6]=o6; 191 e->octet[7]=o7; 192 193 return (0); 194 } 195 196 /* 197 * Convert a binary representation of an EUI-64 to an ASCII string. 198 */ 199 int 200 eui64_ntoa(const struct eui64 *id, char *a, size_t len) 201 { 202 int i; 203 204 i = snprintf(a, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x", 205 id->octet[0], id->octet[1], id->octet[2], id->octet[3], 206 id->octet[4], id->octet[5], id->octet[6], id->octet[7]); 207 if (i < 23 || i >= len) 208 return (-1); 209 return (0); 210 } 211 212 /* 213 * Map an EUI-64 to a hostname. Use either /etc/eui64 or NIS/YP. 214 */ 215 int 216 eui64_ntohost(char *hostname, size_t len, const struct eui64 *id) 217 { 218 FILE *fp; 219 char buf[BUFSIZ + 2]; 220 struct eui64 local_eui64; 221 char local_host[MAXHOSTNAMELEN]; 222 #ifdef YP 223 char *result; 224 int resultlen; 225 char eui64_a[24]; 226 char *yp_domain; 227 #endif 228 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 229 return (1); 230 231 while (fgets(buf,BUFSIZ,fp)) { 232 if (buf[0] == '#') 233 continue; 234 #ifdef YP 235 if (buf[0] == '+') { 236 if (yp_get_default_domain(&yp_domain)) 237 continue; 238 eui64_ntoa(id, eui64_a, sizeof(eui64_a)); 239 if (yp_match(yp_domain, "eui64.byid", eui64_a, 240 strlen(eui64_a), &result, &resultlen)) { 241 continue; 242 } 243 strncpy(buf, result, resultlen); 244 buf[resultlen] = '\0'; 245 free(result); 246 } 247 #endif 248 if (eui64_line(buf, &local_eui64, local_host, 249 sizeof(local_host)) == 0) { 250 if (bcmp(&local_eui64.octet[0], 251 &id->octet[0], EUI64_LEN) == 0) { 252 /* We have a match */ 253 strcpy(hostname, local_host); 254 fclose(fp); 255 return(0); 256 } 257 } 258 } 259 fclose(fp); 260 return (1); 261 } 262 263 /* 264 * Map a hostname to an EUI-64 using /etc/eui64 or NIS/YP. 265 */ 266 int 267 eui64_hostton(const char *hostname, struct eui64 *id) 268 { 269 FILE *fp; 270 char buf[BUFSIZ + 2]; 271 struct eui64 local_eui64; 272 char local_host[MAXHOSTNAMELEN]; 273 #ifdef YP 274 char *result; 275 int resultlen; 276 char *yp_domain; 277 #endif 278 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 279 return (1); 280 281 while (fgets(buf,BUFSIZ,fp)) { 282 if (buf[0] == '#') 283 continue; 284 #ifdef YP 285 if (buf[0] == '+') { 286 if (yp_get_default_domain(&yp_domain)) 287 continue; 288 if (yp_match(yp_domain, "eui64.byname", hostname, 289 strlen(hostname), &result, &resultlen)) { 290 continue; 291 } 292 strncpy(buf, result, resultlen); 293 buf[resultlen] = '\0'; 294 free(result); 295 } 296 #endif 297 if (eui64_line(buf, &local_eui64, local_host, 298 sizeof(local_host)) == 0) { 299 if (strcmp(hostname, local_host) == 0) { 300 /* We have a match */ 301 bcopy(&local_eui64, id, sizeof(struct eui64)); 302 fclose(fp); 303 return(0); 304 } 305 } 306 } 307 fclose(fp); 308 return (1); 309 } 310