/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved.
*
* files/netmasks.c -- "files" backend for nsswitch "netmasks" database
*/
/*
* All routines necessary to deal with the file /etc/inet/netmasks. The file
* contains mappings from 32 bit network internet addresses to their
* corresponding 32 bit mask internet addresses. The addresses are in dotted
* internet address form.
*/
#include "files_common.h"
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <nss_dbdefs.h>
#include <ctype.h>
/*
* Validate 'files' netmasks entry. The comparison objects are in IPv4
* internet address format.
*/
static int
check_addr(nss_XbyY_args_t *argp, const char *line, int linelen)
{
const char *limit, *linep, *addrstart;
int addrlen;
char addrbuf[NSS_LINELEN_NETMASKS];
struct in_addr lineaddr, argsaddr;
linep = line;
limit = line + linelen;
/* skip leading spaces */
while (linep < limit && isspace(*linep))
linep++;
addrstart = linep;
while (linep < limit && !isspace(*linep))
linep++;
if (linep == limit)
return (0);
addrlen = linep - addrstart;
if (addrlen < sizeof (addrbuf)) {
(void) memcpy(addrbuf, addrstart, addrlen);
addrbuf[addrlen] = '\0';
if ((lineaddr.s_addr = inet_addr(addrbuf)) ==
(in_addr_t)0xffffffffU)
return (0);
if ((argsaddr.s_addr = inet_addr(argp->key.name))
== (in_addr_t)0xffffffffU)
return (0);
return (lineaddr.s_addr == argsaddr.s_addr);
}
return (0);
}
static nss_status_t
getbynet(be, a)
files_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
nss_status_t res;
char tmpbuf[NSS_LINELEN_NETMASKS];
/*
* use the buffer passed in if result is to be returned
* in /etc file format
*/
if (argp->buf.result != NULL) {
argp->buf.buffer = tmpbuf;
argp->buf.buflen = NSS_LINELEN_NETMASKS;
}
res = _nss_files_XY_all(be, argp, 1, argp->key.name, check_addr);
if (argp->buf.result != NULL) {
argp->buf.buffer = NULL;
argp->buf.buflen = 0;
} else {
/* the frontend expects the netmask data only */
if (res == NSS_SUCCESS) {
char *m;
char *s = (char *)argp->returnval;
int l = 0;
m = s + argp->returnlen - 1;
/* skip trailing spaces */
while (s < m && isspace(*m))
m--;
for (; s <= m; m--) {
if (isspace(*m))
break;
l++;
}
m++;
(void) memmove(argp->returnval, m, l);
argp->returnlen = l;
*(s + l) = '\0';
}
}
return (res);
}
static files_backend_op_t netmasks_ops[] = {
_nss_files_destr,
getbynet
};
/*ARGSUSED*/
nss_backend_t *
_nss_files_netmasks_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_files_constr(netmasks_ops,
sizeof (netmasks_ops) / sizeof (netmasks_ops[0]),
_PATH_NETMASKS, NSS_LINELEN_NETMASKS, NULL, 0));
}