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 #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 /*
47 * str2hostent() is now a wrapper to __str2hostent().
48 * __str2hostent() now takes an extra argument to specify the
49 * AF_INET type for address parsing.
50 */
51 int
str2hostent(const char * instr,int lenstr,void * ent,char * buffer,int buflen)52 str2hostent(const char *instr, int lenstr, void *ent, char *buffer, int buflen)
53 {
54 return (__str2hostent(AF_INET, instr, lenstr, ent, buffer, buflen));
55 }
56
57 static int hosts_stayopen;
58 /*
59 * Unsynchronized, but it affects only
60 * efficiency, not correctness
61 */
62
63 static DEFINE_NSS_DB_ROOT(db_root);
64 static DEFINE_NSS_GETENT(context);
65
66 void
_nss_initf_hosts(nss_db_params_t * p)67 _nss_initf_hosts(nss_db_params_t *p)
68 {
69 p->name = NSS_DBNAM_HOSTS;
70 p->default_config = NSS_DEFCONF_HOSTS;
71 }
72
73 int
sethostent(int stay)74 sethostent(int stay)
75 {
76 hosts_stayopen |= stay;
77 nss_setent(&db_root, _nss_initf_hosts, &context);
78 return (0);
79 }
80
81 int
endhostent(void)82 endhostent(void)
83 {
84 hosts_stayopen = 0;
85 nss_endent(&db_root, _nss_initf_hosts, &context);
86 nss_delete(&db_root);
87 return (0);
88 }
89
90 struct hostent *
gethostent_r(struct hostent * result,char * buffer,int buflen,int * h_errnop)91 gethostent_r(struct hostent *result, char *buffer, int buflen, int *h_errnop)
92 {
93 nss_XbyY_args_t arg;
94 nss_status_t res;
95
96 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2hostent);
97 res = nss_getent(&db_root, _nss_initf_hosts,
98 &context, &arg);
99 arg.status = res;
100 *h_errnop = arg.h_errno;
101 return ((struct hostent *)NSS_XbyY_FINI(&arg));
102 }
103