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 <stdio.h> 71 #include <paths.h> 72 #include <sys/param.h> 73 #include <sys/eui64.h> 74 #include <string.h> 75 #include <stdlib.h> 76 #ifdef YP 77 #include <rpc/rpc.h> 78 #include <rpcsvc/yp_prot.h> 79 #include <rpcsvc/ypclnt.h> 80 #endif 81 82 #ifndef _PATH_EUI64 83 #define _PATH_EUI64 "/etc/eui64" 84 #endif 85 86 static int eui64_line(const char *l, struct eui64 *e, char *hostname, 87 size_t len); 88 89 /* 90 * Parse a string of text containing an EUI-64 and hostname 91 * and separate it into its component parts. 92 */ 93 static int 94 eui64_line(const char *l, struct eui64 *e, char *hostname, size_t len) 95 { 96 char *line, *linehead, *cur; 97 98 linehead = strdup(l); 99 if (linehead == NULL) 100 return (-1); 101 line = linehead; 102 103 /* Find and parse the EUI64 */ 104 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 105 if (*cur != '\0') { 106 if (eui64_aton(cur, e) == 0) 107 break; 108 else 109 goto bad; 110 } 111 } 112 113 /* Find the hostname */ 114 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 115 if (*cur != '\0') { 116 if (strlcpy(hostname, cur, len) <= len) 117 break; 118 else 119 goto bad; 120 } 121 } 122 123 /* Make sure what remains is either whitespace or a comment */ 124 while ((cur = strsep(&line, " \t\r\n")) != NULL) { 125 if (*cur == '#') 126 break; 127 if (*cur != '\0') 128 goto bad; 129 } 130 131 free(linehead); 132 return (0); 133 134 bad: 135 free(linehead); 136 return (-1); 137 } 138 139 /* 140 * Convert an ASCII representation of an EUI-64 to binary form. 141 */ 142 int 143 eui64_aton(const char *a, struct eui64 *e) 144 { 145 int i; 146 unsigned int o0, o1, o2, o3, o4, o5, o6, o7; 147 148 /* canonical form */ 149 i = sscanf(a, "%x-%x-%x-%x-%x-%x-%x-%x", 150 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 151 if (i == EUI64_LEN) 152 goto good; 153 /* ethernet form */ 154 i = sscanf(a, "%x:%x:%x:%x:%x:%x:%x:%x", 155 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 156 if (i == EUI64_LEN) 157 goto good; 158 /* classic fwcontrol/dconschat form */ 159 i = sscanf(a, "0x%2x%2x%2x%2x%2x%2x%2x%2x", 160 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 161 if (i == EUI64_LEN) 162 goto good; 163 /* MAC format (-) */ 164 i = sscanf(a, "%x-%x-%x-%x-%x-%x", 165 &o0, &o1, &o2, &o5, &o6, &o7); 166 if (i == 6) { 167 o3 = 0xff; 168 o4 = 0xfe; 169 goto good; 170 } 171 /* MAC format (:) */ 172 i = sscanf(a, "%x:%x:%x:%x:%x:%x", 173 &o0, &o1, &o2, &o5, &o6, &o7); 174 if (i == 6) { 175 o3 = 0xff; 176 o4 = 0xfe; 177 goto good; 178 } 179 180 return (-1); 181 182 good: 183 e->octet[0]=o0; 184 e->octet[1]=o1; 185 e->octet[2]=o2; 186 e->octet[3]=o3; 187 e->octet[4]=o4; 188 e->octet[5]=o5; 189 e->octet[6]=o6; 190 e->octet[7]=o7; 191 192 return (0); 193 } 194 195 /* 196 * Convert a binary representation of an EUI-64 to an ASCII string. 197 */ 198 int 199 eui64_ntoa(const struct eui64 *id, char *a, size_t len) 200 { 201 int i; 202 203 i = snprintf(a, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x", 204 id->octet[0], id->octet[1], id->octet[2], id->octet[3], 205 id->octet[4], id->octet[5], id->octet[6], id->octet[7]); 206 if (i < 23 || i >= len) 207 return (-1); 208 return (0); 209 } 210 211 /* 212 * Map an EUI-64 to a hostname. Use either /etc/eui64 or NIS/YP. 213 */ 214 int 215 eui64_ntohost(char *hostname, size_t len, const struct eui64 *id) 216 { 217 FILE *fp; 218 char buf[BUFSIZ + 2]; 219 struct eui64 local_eui64; 220 char local_host[MAXHOSTNAMELEN]; 221 #ifdef YP 222 char *result; 223 int resultlen; 224 char eui64_a[24]; 225 char *yp_domain; 226 #endif 227 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 228 return (1); 229 230 while (fgets(buf,BUFSIZ,fp)) { 231 if (buf[0] == '#') 232 continue; 233 #ifdef YP 234 if (buf[0] == '+') { 235 if (yp_get_default_domain(&yp_domain)) 236 continue; 237 eui64_ntoa(id, eui64_a, sizeof(eui64_a)); 238 if (yp_match(yp_domain, "eui64.byid", eui64_a, 239 strlen(eui64_a), &result, &resultlen)) { 240 continue; 241 } 242 strncpy(buf, result, resultlen); 243 buf[resultlen] = '\0'; 244 free(result); 245 } 246 #endif 247 if (eui64_line(buf, &local_eui64, local_host, 248 sizeof(local_host)) == 0) { 249 if (bcmp(&local_eui64.octet[0], 250 &id->octet[0], EUI64_LEN) == 0) { 251 /* We have a match */ 252 strcpy(hostname, local_host); 253 fclose(fp); 254 return(0); 255 } 256 } 257 } 258 fclose(fp); 259 return (1); 260 } 261 262 /* 263 * Map a hostname to an EUI-64 using /etc/eui64 or NIS/YP. 264 */ 265 int 266 eui64_hostton(const char *hostname, struct eui64 *id) 267 { 268 FILE *fp; 269 char buf[BUFSIZ + 2]; 270 struct eui64 local_eui64; 271 char local_host[MAXHOSTNAMELEN]; 272 #ifdef YP 273 char *result; 274 int resultlen; 275 char *yp_domain; 276 #endif 277 if ((fp = fopen(_PATH_EUI64, "re")) == NULL) 278 return (1); 279 280 while (fgets(buf,BUFSIZ,fp)) { 281 if (buf[0] == '#') 282 continue; 283 #ifdef YP 284 if (buf[0] == '+') { 285 if (yp_get_default_domain(&yp_domain)) 286 continue; 287 if (yp_match(yp_domain, "eui64.byname", hostname, 288 strlen(hostname), &result, &resultlen)) { 289 continue; 290 } 291 strncpy(buf, result, resultlen); 292 buf[resultlen] = '\0'; 293 free(result); 294 } 295 #endif 296 if (eui64_line(buf, &local_eui64, local_host, 297 sizeof(local_host)) == 0) { 298 if (strcmp(hostname, local_host) == 0) { 299 /* We have a match */ 300 bcopy(&local_eui64, id, sizeof(struct eui64)); 301 fclose(fp); 302 return(0); 303 } 304 } 305 } 306 fclose(fp); 307 return (1); 308 } 309