freebsd-dev/lib/libc/net/getnetbyht.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

291 lines
7.2 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
* 3. 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 <errno.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, "re");
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, "re")) == 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) {
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return ((errno != 0) ? errno : -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) {
*errnop = errno;
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_RETURN);
}
*((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) {
*errnop = errno;
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
*h_errnop = statp->res_h_errno;
return (NS_RETURN);
}
*((struct netent **)rval) = nptr;
return (NS_SUCCESS);
}