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/*-
* Copyright (c) 1994, Garrett Wollman
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include "reentrant.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <nsswitch.h>
#include "un-namespace.h"
#include "netdb_private.h"
extern int _ht_getnetbyname(void *, void *, va_list);
extern int _dns_getnetbyname(void *, void *, va_list);
extern int _nis_getnetbyname(void *, void *, va_list);
extern int _ht_getnetbyaddr(void *, void *, va_list);
extern int _dns_getnetbyaddr(void *, void *, va_list);
extern int _nis_getnetbyaddr(void *, void *, va_list);
/* Network lookup order if nsswitch.conf is broken or nonexistant */
static const ns_src default_src[] = {
{ NSSRC_FILES, NS_SUCCESS },
{ NSSRC_DNS, NS_SUCCESS },
{ 0 }
};
static struct netdata netdata;
static thread_key_t netdata_key;
static once_t netdata_init_once = ONCE_INITIALIZER;
static int netdata_thr_keycreated = 0;
static void
netdata_free(void *ptr)
{
struct netdata *nd = ptr;
if (nd == NULL)
return;
nd->data.stayopen = 0;
_endnethtent(&nd->data);
free(nd);
}
static void
netdata_keycreate(void)
{
netdata_thr_keycreated =
(thr_keycreate(&netdata_key, netdata_free) == 0);
}
struct netdata *
__netdata_init(void)
{
struct netdata *nd;
if (thr_main() != 0)
return &netdata;
if (thr_once(&netdata_init_once, netdata_keycreate) != 0 ||
!netdata_thr_keycreated)
return NULL;
if ((nd = thr_getspecific(netdata_key)) != NULL)
return nd;
if ((nd = calloc(1, sizeof(*nd))) == NULL)
return NULL;
if (thr_setspecific(netdata_key, nd) == 0)
return nd;
free(nd);
return NULL;
}
int
getnetbyname_r(const char *name, struct netent *ne, struct netent_data *ned)
{
int rval;
static const ns_dtab dtab[] = {
NS_FILES_CB(_ht_getnetbyname, NULL)
{ NSSRC_DNS, _dns_getnetbyname, NULL },
NS_NIS_CB(_nis_getnetbyname, NULL) /* force -DHESIOD */
{ 0 }
};
rval = _nsdispatch(NULL, dtab, NSDB_NETWORKS, "getnetbyname",
default_src, name, ne, ned);
return (rval == NS_SUCCESS) ? 0 : -1;
}
int
getnetbyaddr_r(uint32_t addr, int af, struct netent *ne,
struct netent_data *ned)
{
int rval;
static const ns_dtab dtab[] = {
NS_FILES_CB(_ht_getnetbyaddr, NULL)
{ NSSRC_DNS, _dns_getnetbyaddr, NULL },
NS_NIS_CB(_nis_getnetbyaddr, NULL) /* force -DHESIOD */
{ 0 }
};
rval = _nsdispatch(NULL, dtab, NSDB_NETWORKS, "getnetbyaddr",
default_src, addr, af, ne, ned);
return (rval == NS_SUCCESS) ? 0 : -1;
}
void
setnetent_r(int stayopen, struct netent_data *ned)
{
_setnethtent(stayopen, ned);
_setnetdnsent(stayopen);
}
void
endnetent_r(struct netent_data *ned)
{
_endnethtent(ned);
_endnetdnsent();
}
struct netent *
getnetbyname(const char *name)
{
struct netdata *nd;
if ((nd = __netdata_init()) == NULL)
return NULL;
if (getnetbyname_r(name, &nd->net, &nd->data) != 0)
return NULL;
return &nd->net;
}
struct netent *
getnetbyaddr(uint32_t addr, int af)
{
struct netdata *nd;
if ((nd = __netdata_init()) == NULL)
return NULL;
if (getnetbyaddr_r(addr, af, &nd->net, &nd->data) != 0)
return NULL;
return &nd->net;
}
void
setnetent(int stayopen)
{
struct netdata *nd;
if ((nd = __netdata_init()) == NULL)
return;
setnetent_r(stayopen, &nd->data);
}
void
endnetent(void)
{
struct netdata *nd;
if ((nd = __netdata_init()) == NULL)
return;
endnetent_r(&nd->data);
}
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