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