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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND 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.
*/
/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
* Dep. Matematica Universidade de Coimbra, Portugal, Europe
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* from getnetent.c 1.1 (Coimbra) 93/06/02
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";
static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <nsswitch.h>
#include "netdb_private.h"
void
_setnethtent(int f, struct netent_data *ned)
{
if (ned->netf == NULL)
ned->netf = fopen(_PATH_NETWORKS, "r");
else
rewind(ned->netf);
ned->stayopen |= f;
}
void
_endnethtent(struct netent_data *ned)
{
if (ned->netf) {
fclose(ned->netf);
ned->netf = NULL;
}
ned->stayopen = 0;
}
static int
getnetent_p(struct netent *ne, struct netent_data *ned)
{
char *p, *bp, *ep;
char *cp, **q;
int len;
char line[BUFSIZ + 1];
if (ned->netf == NULL &&
(ned->netf = fopen(_PATH_NETWORKS, "r")) == NULL)
return (-1);
again:
p = fgets(line, sizeof line, ned->netf);
if (p == NULL)
return (-1);
if (*p == '#')
goto again;
cp = strpbrk(p, "#\n");
if (cp != NULL)
*cp = '\0';
bp = ned->netbuf;
ep = ned->netbuf + sizeof ned->netbuf;
ne->n_name = bp;
cp = strpbrk(p, " \t");
if (cp == NULL)
goto again;
*cp++ = '\0';
len = strlen(p) + 1;
if (ep - bp < len) {
RES_SET_H_ERRNO(__res_state(), NO_RECOVERY);
return (-1);
}
strlcpy(bp, p, ep - bp);
bp += len;
while (*cp == ' ' || *cp == '\t')
cp++;
p = strpbrk(cp, " \t");
if (p != NULL)
*p++ = '\0';
ne->n_net = inet_network(cp);
ne->n_addrtype = AF_INET;
q = ne->n_aliases = ned->net_aliases;
if (p != NULL) {
cp = p;
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q >= &ned->net_aliases[_MAXALIASES - 1])
break;
p = strpbrk(cp, " \t");
if (p != NULL)
*p++ = '\0';
len = strlen(cp) + 1;
if (ep - bp < len)
break;
strlcpy(bp, cp, ep - bp);
*q++ = bp;
bp += len;
cp = p;
}
}
*q = NULL;
return (0);
}
int
getnetent_r(struct netent *nptr, char *buffer, size_t buflen,
struct netent **result, int *h_errnop)
{
struct netent_data *ned;
struct netent ne;
res_state statp;
statp = __res_state();
if ((ned = __netent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (-1);
}
if (getnetent_p(&ne, ned) != 0)
return (-1);
if (__copy_netent(&ne, nptr, buffer, buflen) != 0)
return (-1);
*result = nptr;
return (0);
}
struct netent *
getnetent(void)
{
struct netdata *nd;
struct netent *rval;
int ret_h_errno;
if ((nd = __netdata_init()) == NULL)
return (NULL);
if (getnetent_r(&nd->net, nd->data, sizeof(nd->data), &rval,
&ret_h_errno) != 0)
return (NULL);
return (rval);
}
int
_ht_getnetbyname(void *rval, void *cb_data, va_list ap)
{
const char *name;
char *buffer;
size_t buflen;
int *errnop, *h_errnop;
struct netent *nptr, ne;
struct netent_data *ned;
char **cp;
res_state statp;
int error;
name = va_arg(ap, const char *);
nptr = va_arg(ap, struct netent *);
buffer = va_arg(ap, char *);
buflen = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
h_errnop = va_arg(ap, int *);
statp = __res_state();
if ((ned = __netent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_UNAVAIL);
}
_setnethtent(ned->stayopen, ned);
while ((error = getnetent_p(&ne, ned)) == 0) {
if (strcasecmp(ne.n_name, name) == 0)
break;
for (cp = ne.n_aliases; *cp != 0; cp++)
if (strcasecmp(*cp, name) == 0)
goto found;
}
found:
if (!ned->stayopen)
_endnethtent(ned);
if (error != 0) {
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
if (__copy_netent(&ne, nptr, buffer, buflen) != 0) {
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
*((struct netent **)rval) = nptr;
return (NS_SUCCESS);
}
int
_ht_getnetbyaddr(void *rval, void *cb_data, va_list ap)
{
uint32_t net;
int type;
char *buffer;
size_t buflen;
int *errnop, *h_errnop;
struct netent *nptr, ne;
struct netent_data *ned;
res_state statp;
int error;
net = va_arg(ap, uint32_t);
type = va_arg(ap, int);
nptr = va_arg(ap, struct netent *);
buffer = va_arg(ap, char *);
buflen = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
h_errnop = va_arg(ap, int *);
statp = __res_state();
if ((ned = __netent_data_init()) == NULL) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_UNAVAIL);
}
_setnethtent(ned->stayopen, ned);
while ((error = getnetent_p(&ne, ned)) == 0)
if (ne.n_addrtype == type && ne.n_net == net)
break;
if (!ned->stayopen)
_endnethtent(ned);
if (error != 0) {
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
if (__copy_netent(&ne, nptr, buffer, buflen) != 0) {
*h_errnop = statp->res_h_errno;
return (NS_NOTFOUND);
}
*((struct netent **)rval) = nptr;
return (NS_SUCCESS);
}
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