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 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 * 27 * lib/libnsl/nss/gethostent_r.c 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 <sys/socket.h> 41 #include <sys/types.h> 42 #include <nss_dbdefs.h> 43 #include "nss.h" 44 45 /* 46 * str2hostent() is now a wrapper to __str2hostent(). 47 * __str2hostent() now takes an extra argument to specify the 48 * AF_INET type for address parsing. 49 */ 50 int 51 str2hostent(const char *instr, int lenstr, void *ent, char *buffer, int buflen) 52 { 53 return (__str2hostent(AF_INET, instr, lenstr, ent, buffer, buflen)); 54 } 55 56 static int hosts_stayopen; 57 /* 58 * Unsynchronized, but it affects only 59 * efficiency, not correctness 60 */ 61 62 static DEFINE_NSS_DB_ROOT(db_root); 63 static DEFINE_NSS_GETENT(context); 64 65 void 66 _nss_initf_hosts(nss_db_params_t *p) 67 { 68 p->name = NSS_DBNAM_HOSTS; 69 p->default_config = NSS_DEFCONF_HOSTS; 70 } 71 72 int 73 sethostent(int stay) 74 { 75 hosts_stayopen |= stay; 76 nss_setent(&db_root, _nss_initf_hosts, &context); 77 return (0); 78 } 79 80 int 81 endhostent(void) 82 { 83 hosts_stayopen = 0; 84 nss_endent(&db_root, _nss_initf_hosts, &context); 85 nss_delete(&db_root); 86 return (0); 87 } 88 89 struct hostent * 90 gethostent_r(struct hostent *result, char *buffer, int buflen, int *h_errnop) 91 { 92 nss_XbyY_args_t arg; 93 nss_status_t res; 94 95 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2hostent); 96 res = nss_getent(&db_root, _nss_initf_hosts, 97 &context, &arg); 98 arg.status = res; 99 *h_errnop = arg.h_errno; 100 return ((struct hostent *)NSS_XbyY_FINI(&arg)); 101 } 102