/* * Copyright 2004 The Aerospace Corporation. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions, and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of The Aerospace Corporation may not be used to endorse or * promote products derived from this software. * * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Copyright (c) 1995 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * EUI-64 conversion and lookup routines * * * Converted from ether_addr.c rev * FreeBSD: src/lib/libc/net/eui64.c,v 1.15 2002/04/08 07:51:10 ru Exp * by Brooks Davis * * Written by Bill Paul <wpaul@ctr.columbia.edu> * Center for Telecommunications Research * Columbia University, New York City */ #include <stdio.h> #include <paths.h> #include <sys/param.h> #include <sys/eui64.h> #include <string.h> #include <stdlib.h> #ifdef YP #include <rpc/rpc.h> #include <rpcsvc/yp_prot.h> #include <rpcsvc/ypclnt.h> #endif #ifndef _PATH_EUI64 #define _PATH_EUI64 "/etc/eui64" #endif static int eui64_line(const char *l, struct eui64 *e, char *hostname, size_t len); /* * Parse a string of text containing an EUI-64 and hostname * and separate it into its component parts. */ static int eui64_line(const char *l, struct eui64 *e, char *hostname, size_t len) { char *line, *linehead, *cur; linehead = strdup(l); if (linehead == NULL) return (-1); line = linehead; /* Find and parse the EUI64 */ while ((cur = strsep(&line, " \t\r\n")) != NULL) { if (*cur != '\0') { if (eui64_aton(cur, e) == 0) break; else goto bad; } } /* Find the hostname */ while ((cur = strsep(&line, " \t\r\n")) != NULL) { if (*cur != '\0') { if (strlcpy(hostname, cur, len) <= len) break; else goto bad; } } /* Make sure what remains is either whitespace or a comment */ while ((cur = strsep(&line, " \t\r\n")) != NULL) { if (*cur == '#') break; if (*cur != '\0') goto bad; } free(linehead); return (0); bad: free(linehead); return (-1); } /* * Convert an ASCII representation of an EUI-64 to binary form. */ int eui64_aton(const char *a, struct eui64 *e) { int i; unsigned int o0, o1, o2, o3, o4, o5, o6, o7; /* canonical form */ i = sscanf(a, "%x-%x-%x-%x-%x-%x-%x-%x", &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); if (i == EUI64_LEN) goto good; /* ethernet form */ i = sscanf(a, "%x:%x:%x:%x:%x:%x:%x:%x", &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); if (i == EUI64_LEN) goto good; /* classic fwcontrol/dconschat form */ i = sscanf(a, "0x%2x%2x%2x%2x%2x%2x%2x%2x", &o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7); if (i == EUI64_LEN) goto good; /* MAC format (-) */ i = sscanf(a, "%x-%x-%x-%x-%x-%x", &o0, &o1, &o2, &o5, &o6, &o7); if (i == 6) { o3 = 0xff; o4 = 0xfe; goto good; } /* MAC format (:) */ i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o0, &o1, &o2, &o5, &o6, &o7); if (i == 6) { o3 = 0xff; o4 = 0xfe; goto good; } return (-1); good: e->octet[0]=o0; e->octet[1]=o1; e->octet[2]=o2; e->octet[3]=o3; e->octet[4]=o4; e->octet[5]=o5; e->octet[6]=o6; e->octet[7]=o7; return (0); } /* * Convert a binary representation of an EUI-64 to an ASCII string. */ int eui64_ntoa(const struct eui64 *id, char *a, size_t len) { int i; i = snprintf(a, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x", id->octet[0], id->octet[1], id->octet[2], id->octet[3], id->octet[4], id->octet[5], id->octet[6], id->octet[7]); if (i < 23 || i >= len) return (-1); return (0); } /* * Map an EUI-64 to a hostname. Use either /etc/eui64 or NIS/YP. */ int eui64_ntohost(char *hostname, size_t len, const struct eui64 *id) { FILE *fp; char buf[BUFSIZ + 2]; struct eui64 local_eui64; char local_host[MAXHOSTNAMELEN]; #ifdef YP char *result; int resultlen; char eui64_a[24]; char *yp_domain; #endif if ((fp = fopen(_PATH_EUI64, "re")) == NULL) return (1); while (fgets(buf,BUFSIZ,fp)) { if (buf[0] == '#') continue; #ifdef YP if (buf[0] == '+') { if (yp_get_default_domain(&yp_domain)) continue; eui64_ntoa(id, eui64_a, sizeof(eui64_a)); if (yp_match(yp_domain, "eui64.byid", eui64_a, strlen(eui64_a), &result, &resultlen)) { continue; } strncpy(buf, result, resultlen); buf[resultlen] = '\0'; free(result); } #endif if (eui64_line(buf, &local_eui64, local_host, sizeof(local_host)) == 0) { if (bcmp(&local_eui64.octet[0], &id->octet[0], EUI64_LEN) == 0) { /* We have a match */ strcpy(hostname, local_host); fclose(fp); return(0); } } } fclose(fp); return (1); } /* * Map a hostname to an EUI-64 using /etc/eui64 or NIS/YP. */ int eui64_hostton(const char *hostname, struct eui64 *id) { FILE *fp; char buf[BUFSIZ + 2]; struct eui64 local_eui64; char local_host[MAXHOSTNAMELEN]; #ifdef YP char *result; int resultlen; char *yp_domain; #endif if ((fp = fopen(_PATH_EUI64, "re")) == NULL) return (1); while (fgets(buf,BUFSIZ,fp)) { if (buf[0] == '#') continue; #ifdef YP if (buf[0] == '+') { if (yp_get_default_domain(&yp_domain)) continue; if (yp_match(yp_domain, "eui64.byname", hostname, strlen(hostname), &result, &resultlen)) { continue; } strncpy(buf, result, resultlen); buf[resultlen] = '\0'; free(result); } #endif if (eui64_line(buf, &local_eui64, local_host, sizeof(local_host)) == 0) { if (strcmp(hostname, local_host) == 0) { /* We have a match */ bcopy(&local_eui64, id, sizeof(struct eui64)); fclose(fp); return(0); } } } fclose(fp); return (1); }
