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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 
23 /*
24  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
25  * Use is subject to license terms.
26  */
27 
28 /*
29  * This file defines and implements the re-entrant enumeration routines for
30  *   IPv6 hosts: sethostent6(), gethostent6(), and endhostent6().
31  *   They consult the switch policy directly and do not "share" their
32  *   enumeration state nor the stayopen flag with the implentation of the
33  *   more commonly used getipnodebyname()/getipnodebyaddr(). The latter
34  *   follows a tortuous route in order to be consistent with netdir_getbyYY()
35  *   (see getipnodebyname.c and netdir_inet.c).
36  */
37 
38 #pragma ident	"%Z%%M%	%I%	%E% SMI"
39 
40 #include "mt.h"
41 #include <sys/socket.h>
42 #include <sys/types.h>
43 #include <nss_dbdefs.h>
44 #include "nss.h"
45 
46 static int ipnodes_stayopen;
47 /*
48  * Unsynchronized, but it affects only
49  * efficiency, not correctness
50  */
51 
52 static DEFINE_NSS_DB_ROOT(db_root);
53 static DEFINE_NSS_GETENT(context);
54 
55 /* IPv6 wrapper for __str2hostent() */
56 int
str2hostent6(const char * instr,int lenstr,void * ent,char * buffer,int buflen)57 str2hostent6(const char *instr, int lenstr, void *ent, char *buffer, int buflen)
58 {
59 	return (__str2hostent(AF_INET6, instr, lenstr, ent, buffer, buflen));
60 }
61 
62 void
_nss_initf_ipnodes(nss_db_params_t * p)63 _nss_initf_ipnodes(nss_db_params_t *p)
64 {
65 	p->name	= NSS_DBNAM_IPNODES;
66 	p->default_config = NSS_DEFCONF_IPNODES;
67 }
68 
69 int
__sethostent6(int stay)70 __sethostent6(int stay)
71 {
72 	ipnodes_stayopen |= stay;
73 	nss_setent(&db_root, _nss_initf_ipnodes, &context);
74 	return (0);
75 }
76 
77 int
__endhostent6(void)78 __endhostent6(void)
79 {
80 	ipnodes_stayopen = 0;
81 	nss_endent(&db_root, _nss_initf_ipnodes, &context);
82 	nss_delete(&db_root);
83 	return (0);
84 }
85 
86 struct hostent *
__gethostent6(struct hostent * result,char * buffer,int buflen,int * h_errnop)87 __gethostent6(struct hostent *result, char *buffer, int buflen, int *h_errnop)
88 {
89 	nss_XbyY_args_t arg;
90 	nss_status_t	res;
91 
92 	NSS_XbyY_INIT(&arg, result, buffer, buflen, str2hostent6);
93 	res = nss_getent(&db_root, _nss_initf_ipnodes,
94 	    &context, &arg);
95 	arg.status = res;
96 	*h_errnop = arg.h_errno;
97 	return ((struct hostent *)NSS_XbyY_FINI(&arg));
98 }
99