blob: ffe7c4e8eed3092986811b83283778c25fcf131d [file] [log] [blame] [raw]
/* $NetBSD: ethers.c,v 1.17 2000/01/22 22:19:14 mycroft Exp $ */
/*
* ethers(3N) a la Sun.
*
* Written by Roland McGrath <roland@frob.com> 10/14/93.
* Public domain.
*/
#if defined(__hpux) && (HPUXREV >= 1111) && !defined(_KERNEL)
# include <sys/kern_svcs.h>
#endif
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if_arp.h>
#include <stdio.h>
#include <errno.h>
#include "ip_compat.h"
struct ether_addr *
ether_aton(s)
const char *s;
{
static struct ether_addr n;
u_int i[6];
if (sscanf(s, " %x:%x:%x:%x:%x:%x ", &i[0], &i[1],
&i[2], &i[3], &i[4], &i[5]) == 6) {
n.ether_addr_octet[0] = (u_char)i[0];
n.ether_addr_octet[1] = (u_char)i[1];
n.ether_addr_octet[2] = (u_char)i[2];
n.ether_addr_octet[3] = (u_char)i[3];
n.ether_addr_octet[4] = (u_char)i[4];
n.ether_addr_octet[5] = (u_char)i[5];
return &n;
}
return NULL;
}
int
ether_hostton(hostname, e)
const char *hostname;
struct ether_addr *e;
{
FILE *f;
char *p;
size_t len;
char try[MAXHOSTNAMELEN + 1];
char line[512];
#ifdef YP
int hostlen = strlen(hostname);
#endif
f = fopen("/etc/ethers", "r");
if (f==NULL)
return -1;
while ((p = fgets(line, sizeof(line), f)) != NULL) {
if (p[len - 1] != '\n')
continue; /* skip lines w/o \n */
p[--len] = '\0';
#ifdef YP
/* A + in the file means try YP now. */
if (len == 1 && *p == '+') {
char *ypbuf, *ypdom;
int ypbuflen;
if (yp_get_default_domain(&ypdom))
continue;
if (yp_match(ypdom, "ethers.byname", hostname, hostlen,
&ypbuf, &ypbuflen))
continue;
if (ether_line(ypbuf, e, try) == 0) {
free(ypbuf);
(void)fclose(f);
return 0;
}
free(ypbuf);
continue;
}
#endif
if (ether_line(p, e, try) == 0 && strcmp(hostname, try) == 0) {
(void)fclose(f);
return 0;
}
}
(void)fclose(f);
errno = ENOENT;
return -1;
}
int
ether_line(l, e, hostname)
const char *l;
struct ether_addr *e;
char *hostname;
{
u_int i[6];
static char buf[sizeof " %x:%x:%x:%x:%x:%x %s\\n" + 21];
/* XXX: 21 == strlen (ASCII representation of 2^64) */
if (! buf[0])
snprintf(buf, sizeof buf, " %%x:%%x:%%x:%%x:%%x:%%x %%%ds\\n",
MAXHOSTNAMELEN);
if (sscanf(l, buf,
&i[0], &i[1], &i[2], &i[3], &i[4], &i[5], hostname) == 7) {
e->ether_addr_octet[0] = (u_char)i[0];
e->ether_addr_octet[1] = (u_char)i[1];
e->ether_addr_octet[2] = (u_char)i[2];
e->ether_addr_octet[3] = (u_char)i[3];
e->ether_addr_octet[4] = (u_char)i[4];
e->ether_addr_octet[5] = (u_char)i[5];
return 0;
}
errno = EINVAL;
return -1;
}