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 * Copyright 1991-2002 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * lib/libnsl/nss/gethostent_r.c 27 * 28 * This file defines and implements the re-entrant enumeration routines for 29 * hosts: sethostent(), gethostent_r(), and endhostent(). They consult 30 * the switch policy directly and do not "share" their enumeration state 31 * nor the stayopen flag with the implentation of the more commonly used 32 * gethostbyname_r()/gethostbyaddr_r(). The latter follows a tortuous 33 * route in order to be consistent with netdir_getbyYY() (see 34 * gethostbyname_r.c and netdir_inet.c). 35 */ 36 37 #pragma ident "%Z%%M% %I% %E% SMI" 38 39 #include <sys/socket.h> 40 #include <sys/types.h> 41 #include <nss_dbdefs.h> 42 #include <rpc/trace.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 trace1(TR__nss_initf_hosts, 0); 69 p->name = NSS_DBNAM_HOSTS; 70 p->default_config = NSS_DEFCONF_HOSTS; 71 trace1(TR__nss_initf_hosts, 1); 72 } 73 74 int 75 sethostent(int stay) 76 { 77 trace1(TR_sethostent, 0); 78 hosts_stayopen |= stay; 79 nss_setent(&db_root, _nss_initf_hosts, &context); 80 trace1(TR_sethostent, 0); 81 return (0); 82 } 83 84 int 85 endhostent(void) 86 { 87 trace1(TR_endhostent, 0); 88 hosts_stayopen = 0; 89 nss_endent(&db_root, _nss_initf_hosts, &context); 90 nss_delete(&db_root); 91 trace1(TR_endhostent, 0); 92 return (0); 93 } 94 95 struct hostent * 96 gethostent_r(struct hostent *result, char *buffer, int buflen, int *h_errnop) 97 { 98 nss_XbyY_args_t arg; 99 nss_status_t res; 100 101 trace2(TR_gethostbyent_r, 0, buflen); 102 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2hostent); 103 res = nss_getent(&db_root, _nss_initf_hosts, 104 &context, &arg); 105 arg.status = res; 106 *h_errnop = arg.h_errno; 107 trace2(TR_gethostbyent_r, 1, buflen); 108 return ((struct hostent *)NSS_XbyY_FINI(&arg)); 109 } 110