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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 <errno.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 }
};
NETDB_THREAD_ALLOC(netent_data)
NETDB_THREAD_ALLOC(netdata)
static void
netent_data_free(void *ptr)
{
struct netent_data *ned = ptr;
if (ned == NULL)
return;
ned->stayopen = 0;
_endnethtent(ned);
free(ned);
}
static void
netdata_free(void *ptr)
{
free(ptr);
}
int
__copy_netent(struct netent *ne, struct netent *nptr, char *buf, size_t buflen)
{
char *cp;
int i, n;
int numptr, len;
/* Find out the amount of space required to store the answer. */
numptr = 1; /* NULL ptr */
len = (char *)ALIGN(buf) - buf;
for (i = 0; ne->n_aliases[i]; i++, numptr++) {
len += strlen(ne->n_aliases[i]) + 1;
}
len += strlen(ne->n_name) + 1;
len += numptr * sizeof(char*);
if (len > (int)buflen) {
errno = ERANGE;
return (-1);
}
/* copy net value and type */
nptr->n_addrtype = ne->n_addrtype;
nptr->n_net = ne->n_net;
cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
/* copy official name */
n = strlen(ne->n_name) + 1;
strcpy(cp, ne->n_name);
nptr->n_name = cp;
cp += n;
/* copy aliases */
nptr->n_aliases = (char **)ALIGN(buf);
for (i = 0 ; ne->n_aliases[i]; i++) {
n = strlen(ne->n_aliases[i]) + 1;
strcpy(cp, ne->n_aliases[i]);
nptr->n_aliases[i] = cp;
cp += n;
}
nptr->n_aliases[i] = NULL;
return (0);
}
int
getnetbyname_r(const char *name, struct netent *ne, char *buffer,
size_t buflen, struct netent **result, int *h_errorp)
{
int rval, ret_errno;
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((void *)result, dtab, NSDB_NETWORKS,
"getnetbyname_r", default_src, name, ne, buffer, buflen,
&ret_errno, h_errorp);
return ((rval == NS_SUCCESS) ? 0 : -1);
}
int
getnetbyaddr_r(uint32_t addr, int af, struct netent *ne, char *buffer,
size_t buflen, struct netent **result, int *h_errorp)
{
int rval, ret_errno;
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((void *)result, dtab, NSDB_NETWORKS,
"getnetbyaddr_r", default_src, addr, af, ne, buffer, buflen,
&ret_errno, h_errorp);
return ((rval == NS_SUCCESS) ? 0 : -1);
}
struct netent *
getnetbyname(const char *name)
{
struct netdata *nd;
struct netent *rval;
int ret_h_errno;
if ((nd = __netdata_init()) == NULL)
return (NULL);
if (getnetbyname_r(name, &nd->net, nd->data, sizeof(nd->data), &rval,
&ret_h_errno) != 0)
return (NULL);
return (rval);
}
struct netent *
getnetbyaddr(uint32_t addr, int af)
{
struct netdata *nd;
struct netent *rval;
int ret_h_errno;
if ((nd = __netdata_init()) == NULL)
return (NULL);
if (getnetbyaddr_r(addr, af, &nd->net, nd->data, sizeof(nd->data),
&rval, &ret_h_errno) != 0)
return (NULL);
return (rval);
}
void
setnetent(int stayopen)
{
struct netent_data *ned;
if ((ned = __netent_data_init()) == NULL)
return;
_setnethtent(stayopen, ned);
_setnetdnsent(stayopen);
}
void
endnetent(void)
{
struct netent_data *ned;
if ((ned = __netent_data_init()) == NULL)
return;
_endnethtent(ned);
_endnetdnsent();
}
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