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Move files to match FreeBSD layout
This commit is contained in:
Sebastian Huber
232
freebsd/lib/libc/net/ether_addr.c
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232
freebsd/lib/libc/net/ether_addr.c
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#include "port_before.h"
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/*
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* Copyright (c) 1995 Bill Paul <wpaul@ctr.columbia.edu>.
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* Copyright (c) 2007 Robert N. M. Watson
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* 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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* ethernet address conversion and lookup routines
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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 <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <net/ethernet.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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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef _PATH_ETHERS
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#define _PATH_ETHERS "/etc/ethers"
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#endif
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/*
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* Parse a string of text containing an ethernet address and hostname and
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* separate it into its component parts.
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*/
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int
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ether_line(const char *l, struct ether_addr *e, char *hostname)
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{
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int i, o[6];
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i = sscanf(l, "%x:%x:%x:%x:%x:%x %s", &o[0], &o[1], &o[2], &o[3],
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&o[4], &o[5], hostname);
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if (i != 7)
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return (i);
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for (i=0; i<6; i++)
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e->octet[i] = o[i];
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return (0);
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}
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/*
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* Convert an ASCII representation of an ethernet address to binary form.
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*/
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struct ether_addr *
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ether_aton_r(const char *a, struct ether_addr *e)
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{
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int i;
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unsigned int o0, o1, o2, o3, o4, o5;
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i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o0, &o1, &o2, &o3, &o4, &o5);
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if (i != 6)
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return (NULL);
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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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return (e);
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}
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struct ether_addr *
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ether_aton(const char *a)
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{
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static struct ether_addr e;
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return (ether_aton_r(a, &e));
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}
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/*
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* Convert a binary representation of an ethernet address to an ASCII string.
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*/
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char *
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ether_ntoa_r(const struct ether_addr *n, char *a)
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{
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int i;
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i = sprintf(a, "%02x:%02x:%02x:%02x:%02x:%02x", n->octet[0],
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n->octet[1], n->octet[2], n->octet[3], n->octet[4], n->octet[5]);
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if (i < 17)
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return (NULL);
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return (a);
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}
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char *
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ether_ntoa(const struct ether_addr *n)
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{
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static char a[18];
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return (ether_ntoa_r(n, a));
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}
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/*
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* Map an ethernet address to a hostname. Use either /etc/ethers or NIS/YP.
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*/
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int
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ether_ntohost(char *hostname, const struct ether_addr *e)
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{
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FILE *fp;
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char buf[BUFSIZ + 2];
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struct ether_addr local_ether;
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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 *ether_a;
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char *yp_domain;
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#endif
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if ((fp = fopen(_PATH_ETHERS, "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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ether_a = ether_ntoa(e);
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if (yp_match(yp_domain, "ethers.byaddr", ether_a,
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strlen(ether_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 (!ether_line(buf, &local_ether, local_host)) {
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if (!bcmp((char *)&local_ether.octet[0],
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(char *)&e->octet[0], 6)) {
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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 ethernet address using /etc/ethers or NIS/YP.
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*/
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int
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ether_hostton(const char *hostname, struct ether_addr *e)
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{
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FILE *fp;
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char buf[BUFSIZ + 2];
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struct ether_addr local_ether;
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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_ETHERS, "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, "ethers.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 (!ether_line(buf, &local_ether, local_host)) {
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if (!strcmp(hostname, local_host)) {
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/* We have a match. */
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bcopy((char *)&local_ether.octet[0],
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(char *)&e->octet[0], 6);
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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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