* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
221 lines
4.6 KiB
C
221 lines
4.6 KiB
C
/* $NetBSD: ethers.c,v 1.23 2012/03/20 17:44:18 matt Exp $ */
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/*
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* ethers(3N) a la Sun.
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*
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* Written by Roland McGrath <roland@frob.com> 10/14/93.
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* Public domain.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: ethers.c,v 1.23 2012/03/20 17:44:18 matt Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_ether.h>
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#include <netinet/in.h>
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#include <assert.h>
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#include <errno.h>
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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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#ifdef YP
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#include <rpcsvc/ypclnt.h>
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#endif
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#ifdef __weak_alias
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__weak_alias(ether_aton,_ether_aton)
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__weak_alias(ether_hostton,_ether_hostton)
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__weak_alias(ether_line,_ether_line)
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__weak_alias(ether_ntoa,_ether_ntoa)
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__weak_alias(ether_ntohost,_ether_ntohost)
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#endif
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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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char *
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ether_ntoa(const struct ether_addr *e)
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{
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static char a[18];
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_DIAGASSERT(e != NULL);
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(void) snprintf(a, sizeof a, "%02x:%02x:%02x:%02x:%02x:%02x",
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e->ether_addr_octet[0], e->ether_addr_octet[1],
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e->ether_addr_octet[2], e->ether_addr_octet[3],
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e->ether_addr_octet[4], e->ether_addr_octet[5]);
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return a;
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}
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struct ether_addr *
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ether_aton(const char *s)
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{
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static struct ether_addr n;
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u_int i[6];
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_DIAGASSERT(s != NULL);
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if (sscanf(s, " %x:%x:%x:%x:%x:%x ", &i[0], &i[1],
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&i[2], &i[3], &i[4], &i[5]) == 6) {
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n.ether_addr_octet[0] = (u_char)i[0];
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n.ether_addr_octet[1] = (u_char)i[1];
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n.ether_addr_octet[2] = (u_char)i[2];
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n.ether_addr_octet[3] = (u_char)i[3];
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n.ether_addr_octet[4] = (u_char)i[4];
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n.ether_addr_octet[5] = (u_char)i[5];
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return &n;
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}
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return NULL;
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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 *f;
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char *p;
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size_t len;
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struct ether_addr try;
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#ifdef YP
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char trybuf[sizeof "xx:xx:xx:xx:xx:xx"];
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int trylen;
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#endif
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_DIAGASSERT(hostname != NULL);
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_DIAGASSERT(e != NULL);
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#ifdef YP
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trylen = snprintf(trybuf, sizeof trybuf, "%x:%x:%x:%x:%x:%x",
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e->ether_addr_octet[0], e->ether_addr_octet[1],
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e->ether_addr_octet[2], e->ether_addr_octet[3],
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e->ether_addr_octet[4], e->ether_addr_octet[5]);
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#endif
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f = fopen(_PATH_ETHERS, "r");
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if (f == NULL)
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return -1;
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while ((p = fgetln(f, &len)) != NULL) {
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if (p[len - 1] != '\n')
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continue; /* skip lines w/o \n */
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p[--len] = '\0';
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#ifdef YP
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/* A + in the file means try YP now. */
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if (len == 1 && *p == '+') {
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char *ypbuf, *ypdom;
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int ypbuflen;
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if (yp_get_default_domain(&ypdom))
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continue;
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if (yp_match(ypdom, "ethers.byaddr", trybuf,
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trylen, &ypbuf, &ypbuflen))
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continue;
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if (ether_line(ypbuf, &try, hostname) == 0) {
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free(ypbuf);
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(void)fclose(f);
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return 0;
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}
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free(ypbuf);
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continue;
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}
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#endif
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if (ether_line(p, &try, hostname) == 0 &&
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memcmp(&try, e, sizeof try) == 0) {
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(void)fclose(f);
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return 0;
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}
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}
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(void)fclose(f);
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errno = ENOENT;
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return -1;
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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 *f;
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char *p;
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size_t len;
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char try[MAXHOSTNAMELEN + 1];
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#ifdef YP
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int hostlen = (int)strlen(hostname);
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#endif
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_DIAGASSERT(hostname != NULL);
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_DIAGASSERT(e != NULL);
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f = fopen(_PATH_ETHERS, "r");
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if (f==NULL)
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return -1;
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while ((p = fgetln(f, &len)) != NULL) {
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if (p[len - 1] != '\n')
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continue; /* skip lines w/o \n */
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p[--len] = '\0';
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#ifdef YP
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/* A + in the file means try YP now. */
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if (len == 1 && *p == '+') {
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char *ypbuf, *ypdom;
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int ypbuflen;
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if (yp_get_default_domain(&ypdom))
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continue;
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if (yp_match(ypdom, "ethers.byname", hostname, hostlen,
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&ypbuf, &ypbuflen))
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continue;
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if (ether_line(ypbuf, e, try) == 0) {
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free(ypbuf);
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(void)fclose(f);
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return 0;
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}
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free(ypbuf);
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continue;
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}
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#endif
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if (ether_line(p, e, try) == 0 && strcmp(hostname, try) == 0) {
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(void)fclose(f);
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return 0;
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}
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}
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(void)fclose(f);
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errno = ENOENT;
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return -1;
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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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u_int i[6];
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#define S2(arg) #arg
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#define S1(arg) S2(arg)
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static const char fmt[] = " %x:%x:%x:%x:%x:%x"
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" %" S1(MAXHOSTNAMELEN) "s\n";
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#undef S2
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#undef S1
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_DIAGASSERT(l != NULL);
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_DIAGASSERT(e != NULL);
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_DIAGASSERT(hostname != NULL);
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if (sscanf(l, fmt,
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&i[0], &i[1], &i[2], &i[3], &i[4], &i[5], hostname) == 7) {
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e->ether_addr_octet[0] = (u_char)i[0];
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e->ether_addr_octet[1] = (u_char)i[1];
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e->ether_addr_octet[2] = (u_char)i[2];
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e->ether_addr_octet[3] = (u_char)i[3];
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e->ether_addr_octet[4] = (u_char)i[4];
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e->ether_addr_octet[5] = (u_char)i[5];
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return 0;
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}
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errno = EINVAL;
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return -1;
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}
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