82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
/* Copyright (C) 1996, 1999, 2002, 2007 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <netinet/ether.h>
|
|
#include <netinet/if_ether.h>
|
|
#include <string.h>
|
|
|
|
#include "../nss/nsswitch.h"
|
|
|
|
/* Type of the lookup function we need here. */
|
|
typedef int (*lookup_function) (const char *, struct etherent *, char *, int,
|
|
int *);
|
|
|
|
/* The lookup function for the first entry of this service. */
|
|
extern int __nss_ethers_lookup (service_user **nip, const char *name,
|
|
void **fctp) internal_function;
|
|
|
|
|
|
int
|
|
ether_hostton (const char *hostname, struct ether_addr *addr)
|
|
{
|
|
static service_user *startp;
|
|
static lookup_function start_fct;
|
|
service_user *nip;
|
|
union
|
|
{
|
|
lookup_function f;
|
|
void *ptr;
|
|
} fct;
|
|
int no_more;
|
|
enum nss_status status = NSS_STATUS_UNAVAIL;
|
|
struct etherent etherent;
|
|
|
|
if (startp == NULL)
|
|
{
|
|
no_more = __nss_ethers_lookup (&nip, "gethostton_r", &fct.ptr);
|
|
if (no_more)
|
|
startp = (service_user *) -1;
|
|
else
|
|
{
|
|
startp = nip;
|
|
start_fct = fct.f;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fct.f = start_fct;
|
|
no_more = (nip = startp) == (service_user *) -1;
|
|
}
|
|
|
|
while (no_more == 0)
|
|
{
|
|
char buffer[1024];
|
|
|
|
status = (*fct.f) (hostname, ðerent, buffer, sizeof buffer, &errno);
|
|
|
|
no_more = __nss_next2 (&nip, "gethostton_r", NULL, &fct.ptr, status, 0);
|
|
}
|
|
|
|
if (status == NSS_STATUS_SUCCESS)
|
|
memcpy (addr, etherent.e_addr.ether_addr_octet,
|
|
sizeof (struct ether_addr));
|
|
|
|
return status == NSS_STATUS_SUCCESS ? 0 : -1;
|
|
}
|