Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/inet/ether_hton.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
81 lines (66 sloc)
2.24 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Copyright (C) 1996-2016 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; | |
} |