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 * $FreeBSD: src/lib/libc/net/eui64.c,v 1.2 2004/06/01 19:30:13 brooks Exp $ 70 */ 71 72 #include <stdio.h> 73 #include <paths.h> 74 #include <sys/types.h> 75 #include <sys/eui64.h> 76 #include <string.h> 77 #include <stdlib.h> 78 #include <sys/param.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 return (0); 135 136 bad: 137 free(linehead); 138 return (-1); 139 } 140 141 /* 142 * Convert an ASCII representation of an EUI-64 to binary form. 143 */ 144 int 145 eui64_aton(const char *a, struct eui64 *e) 146 { 147 int i; 148 unsigned int o0, o1, o2, o3, o4, o5, o6, o7; 149 150 /* canonical form */ 151 i = sscanf(a, "%x-%x-%x-%x-%x-%x-%x-%x", 152 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 153 if (i == EUI64_LEN) 154 goto good; 155 /* ethernet form */ 156 i = sscanf(a, "%x:%x:%x:%x:%x:%x:%x:%x", 157 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 158 if (i == EUI64_LEN) 159 goto good; 160 /* classic fwcontrol/dconschat form */ 161 i = sscanf(a, "0x%2x%2x%2x%2x%2x%2x%2x%2x", 162 &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); 163 if (i == EUI64_LEN) 164 goto good; 165 /* MAC format (-) */ 166 i = sscanf(a, "%x-%x-%x-%x-%x-%x", 167 &o0, &o1, &o2, &o5, &o6, &o7); 168 if (i == 6) { 169 o3 = 0xff; 170 o4 = 0xfe; 171 goto good; 172 } 173 /* MAC format (:) */ 174 i = sscanf(a, "%x:%x:%x:%x:%x:%x", 175 &o0, &o1, &o2, &o5, &o6, &o7); 176 if (i == 6) { 177 o3 = 0xff; 178 o4 = 0xfe; 179 goto good; 180 } 181 182 return (-1); 183 184 good: 185 e->octet[0]=o0; 186 e->octet[1]=o1; 187 e->octet[2]=o2; 188 e->octet[3]=o3; 189 e->octet[4]=o4; 190 e->octet[5]=o5; 191 e->octet[6]=o6; 192 e->octet[7]=o7; 193 194 return (0); 195 } 196 197 /* 198 * Convert a binary representation of an EUI-64 to an ASCII string. 199 */ 200 int 201 eui64_ntoa(const struct eui64 *id, char *a, size_t len) 202 { 203 int i; 204 205 i = snprintf(a, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x", 206 id->octet[0], id->octet[1], id->octet[2], id->octet[3], 207 id->octet[4], id->octet[5], id->octet[6], id->octet[7]); 208 if (i < 23 || i >= len) 209 return (-1); 210 return (0); 211 } 212 213 /* 214 * Map an EUI-64 to a hostname. Use either /etc/eui64 or NIS/YP. 215 */ 216 int 217 eui64_ntohost(char *hostname, size_t len, const struct eui64 *id) 218 { 219 FILE *fp; 220 char buf[BUFSIZ + 2]; 221 struct eui64 local_eui64; 222 char local_host[MAXHOSTNAMELEN]; 223 #ifdef YP 224 char *result; 225 int resultlen; 226 char eui64_a[24]; 227 char *yp_domain; 228 #endif 229 if ((fp = fopen(_PATH_EUI64, "r")) == NULL) 230 return (1); 231 232 while (fgets(buf,BUFSIZ,fp)) { 233 if (buf[0] == '#') 234 continue; 235 #ifdef YP 236 if (buf[0] == '+') { 237 if (yp_get_default_domain(&yp_domain)) 238 continue; 239 eui64_ntoa(id, eui64_a, sizeof(eui64_a)); 240 if (yp_match(yp_domain, "eui64.byid", eui64_a, 241 strlen(eui64_a), &result, &resultlen)) { 242 continue; 243 } 244 strncpy(buf, result, resultlen); 245 buf[resultlen] = '\0'; 246 free(result); 247 } 248 #endif 249 if (eui64_line(buf, &local_eui64, local_host, 250 sizeof(local_host)) == 0) { 251 if (bcmp(&local_eui64.octet[0], 252 &id->octet[0], EUI64_LEN) == 0) { 253 /* We have a match */ 254 strcpy(hostname, local_host); 255 fclose(fp); 256 return(0); 257 } 258 } 259 } 260 fclose(fp); 261 return (1); 262 } 263 264 /* 265 * Map a hostname to an EUI-64 using /etc/eui64 or NIS/YP. 266 */ 267 int 268 eui64_hostton(const char *hostname, struct eui64 *id) 269 { 270 FILE *fp; 271 char buf[BUFSIZ + 2]; 272 struct eui64 local_eui64; 273 char local_host[MAXHOSTNAMELEN]; 274 #ifdef YP 275 char *result; 276 int resultlen; 277 char *yp_domain; 278 #endif 279 if ((fp = fopen(_PATH_EUI64, "r")) == NULL) 280 return (1); 281 282 while (fgets(buf,BUFSIZ,fp)) { 283 if (buf[0] == '#') 284 continue; 285 #ifdef YP 286 if (buf[0] == '+') { 287 if (yp_get_default_domain(&yp_domain)) 288 continue; 289 if (yp_match(yp_domain, "eui64.byname", hostname, 290 strlen(hostname), &result, &resultlen)) { 291 continue; 292 } 293 strncpy(buf, result, resultlen); 294 buf[resultlen] = '\0'; 295 free(result); 296 } 297 #endif 298 if (eui64_line(buf, &local_eui64, local_host, 299 sizeof(local_host)) == 0) { 300 if (strcmp(hostname, local_host) == 0) { 301 /* We have a match */ 302 bcopy(&local_eui64, id, sizeof(struct eui64)); 303 fclose(fp); 304 return(0); 305 } 306 } 307 } 308 fclose(fp); 309 return (1); 310 } 311