gethostent6.c revision 2830:5228d1267a01 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 *
25 *	nis/gethostent.c -- "nis" backend for nsswitch "ipnodes" database
26 */
27
28#pragma ident	"%Z%%M%	%I%	%E% SMI"
29
30#include <ctype.h>
31#include <netdb.h>
32#include <stdio.h>
33#include <string.h>
34#include <netinet/in.h>
35#include <arpa/inet.h>
36#include <sys/socket.h>
37#include "nis_common.h"
38#include <stdlib.h>
39
40
41static nss_status_t
42getbyname(be, a)
43	nis_backend_ptr_t	be;
44	void			*a;
45{
46	nss_XbyY_args_t		*argp = (nss_XbyY_args_t *)a;
47	nss_status_t	res;
48
49	const char		*s;
50	char			c;
51
52	for (s = argp->key.ipnode.name;  (c = *s) != '\0';  s++) {
53		if (isupper(c)) {
54			char		*copy;
55			char		*mung;
56
57			if ((copy = strdup(argp->key.ipnode.name)) == 0) {
58				return (NSS_UNAVAIL);
59			}
60			for (mung = copy + (s - argp->key.ipnode.name);
61			    (c = *mung) != '\0';  mung++) {
62				if (isupper(c)) {
63					*mung = _tolower(c);
64				}
65			}
66			res = _nss_nis_lookup(be, argp, 1, "ipnodes.byname",
67				copy, 0);
68			if (res != NSS_SUCCESS)
69				argp->h_errno = __nss2herrno(res);
70			free(copy);
71			return (res);
72		}
73	}
74	res = _nss_nis_lookup(be, argp, 1,
75				"ipnodes.byname", argp->key.ipnode.name, 0);
76	if (res != NSS_SUCCESS)
77		argp->h_errno = __nss2herrno(res);
78	return (res);
79}
80
81static nss_status_t
82getbyaddr(be, a)
83	nis_backend_ptr_t	be;
84	void			*a;
85{
86	nss_XbyY_args_t		*argp	= (nss_XbyY_args_t *)a;
87	struct in6_addr		addr;
88	char			buf[INET6_ADDRSTRLEN + 1];
89	nss_status_t	res;
90
91	/* === Do we really want to be this pedantic? */
92	if (argp->key.hostaddr.type != AF_INET6 ||
93	    argp->key.hostaddr.len  != sizeof (addr)) {
94		return (NSS_NOTFOUND);
95	}
96	(void) memcpy(&addr, argp->key.hostaddr.addr, sizeof (addr));
97	if (IN6_IS_ADDR_V4MAPPED(&addr)) {
98		if (inet_ntop(AF_INET, (void *) &addr.s6_addr[12],
99				(void *)buf, INET_ADDRSTRLEN) == NULL) {
100			return (NSS_NOTFOUND);
101		}
102	} else {
103		if (inet_ntop(AF_INET6, (void *)&addr, (void *)buf,
104						INET6_ADDRSTRLEN) == NULL)
105			return (NSS_NOTFOUND);
106	}
107
108	res = _nss_nis_lookup(be, argp, 1, "ipnodes.byaddr", buf, 0);
109	if (res != NSS_SUCCESS)
110		argp->h_errno = __nss2herrno(res);
111	return (res);
112}
113
114
115static nis_backend_op_t ipnodes_ops[] = {
116	_nss_nis_destr,
117	_nss_nis_endent,
118	_nss_nis_setent,
119	_nss_nis_getent_netdb,
120	getbyname,
121	getbyaddr
122};
123
124/*ARGSUSED*/
125nss_backend_t *
126_nss_nis_ipnodes_constr(dummy1, dummy2, dummy3)
127	const char	*dummy1, *dummy2, *dummy3;
128{
129	return (_nss_nis_constr(ipnodes_ops,
130			sizeof (ipnodes_ops) / sizeof (ipnodes_ops[0]),
131			"ipnodes.byaddr"));
132}
133