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 * hosts: sethostent(), gethostent_r(), and endhostent(). They consult
31 * the switch policy directly and do not "share" their enumeration state
32 * nor the stayopen flag with the implentation of the more commonly used
33 * gethostbyname_r()/gethostbyaddr_r(). The latter follows a tortuous
34 * route in order to be consistent with netdir_getbyYY() (see
35 * gethostbyname_r.c and netdir_inet.c).
36 */
37
38 #include "mt.h"
39 #include <sys/socket.h>
40 #include <sys/types.h>
41 #include <nss_dbdefs.h>
42 #include "nss.h"
43
44 /*
45 * str2hostent() is now a wrapper to __str2hostent().
46 * __str2hostent() now takes an extra argument to specify the
47 * AF_INET type for address parsing.
48 */
49 int
str2hostent(const char * instr,int lenstr,void * ent,char * buffer,int buflen)50 str2hostent(const char *instr, int lenstr, void *ent, char *buffer, int buflen)
51 {
52 return (__str2hostent(AF_INET, instr, lenstr, ent, buffer, buflen));
53 }
54
55 static int hosts_stayopen;
56 /*
57 * Unsynchronized, but it affects only
58 * efficiency, not correctness
59 */
60
61 static DEFINE_NSS_DB_ROOT(db_root);
62 static DEFINE_NSS_GETENT(context);
63
64 void
_nss_initf_hosts(nss_db_params_t * p)65 _nss_initf_hosts(nss_db_params_t *p)
66 {
67 p->name = NSS_DBNAM_HOSTS;
68 p->default_config = NSS_DEFCONF_HOSTS;
69 }
70
71 int
sethostent(int stay)72 sethostent(int stay)
73 {
74 hosts_stayopen |= stay;
75 nss_setent(&db_root, _nss_initf_hosts, &context);
76 return (0);
77 }
78
79 int
endhostent(void)80 endhostent(void)
81 {
82 hosts_stayopen = 0;
83 nss_endent(&db_root, _nss_initf_hosts, &context);
84 nss_delete(&db_root);
85 return (0);
86 }
87
88 struct hostent *
gethostent_r(struct hostent * result,char * buffer,int buflen,int * h_errnop)89 gethostent_r(struct hostent *result, char *buffer, int buflen, int *h_errnop)
90 {
91 nss_XbyY_args_t arg;
92 nss_status_t res;
93
94 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2hostent);
95 res = nss_getent(&db_root, _nss_initf_hosts,
96 &context, &arg);
97 arg.status = res;
98 *h_errnop = arg.h_errno;
99 return ((struct hostent *)NSS_XbyY_FINI(&arg));
100 }
101