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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 /* 26 * Common code and structures used by name-service-switch "dns" backends. 27 */ 28 29 #ifndef _DNS_COMMON_H 30 #define _DNS_COMMON_H 31 32 #pragma ident "%Z%%M% %I% %E% SMI" 33 34 #include <stdio.h> 35 #include <ctype.h> 36 #include <sys/types.h> 37 #include <sys/socket.h> 38 #include <netinet/in.h> 39 #include <netdb.h> 40 #include <strings.h> 41 #include <thread.h> 42 #include <arpa/inet.h> 43 #include <arpa/nameser.h> 44 #include <resolv.h> 45 #include <syslog.h> 46 #include <nsswitch.h> 47 #include <nss_common.h> 48 #include <nss_dbdefs.h> 49 #include <stdlib.h> 50 #include <signal.h> 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 typedef struct dns_backend *dns_backend_ptr_t; 57 typedef nss_status_t (*dns_backend_op_t)(dns_backend_ptr_t, void *); 58 59 struct dns_backend { 60 dns_backend_op_t *ops; 61 nss_dbop_t n_ops; 62 }; 63 64 /* multithreaded libresolv2 related functions and variables */ 65 extern void (*set_no_hosts_fallback)(void); 66 extern void (*unset_no_hosts_fallback)(void); 67 extern struct __res_state *(*set_res_retry)(); 68 extern int (*enable_mt)(); 69 extern int (*disable_mt)(); 70 extern int *(*get_h_errno)(); 71 extern int (*override_retry)(int); 72 extern void switch_resolver_setup(int *, sigset_t *, int *); 73 extern void switch_resolver_reset(int, sigset_t, int); 74 extern mutex_t one_lane; 75 76 extern int _thr_sigsetmask(int, const sigset_t *, sigset_t *); 77 extern int _mutex_lock(mutex_t *); 78 extern int _mutex_unlock(mutex_t *); 79 80 extern int ent2result(struct hostent *, nss_XbyY_args_t *, int); 81 extern int ent2str(struct hostent *, nss_XbyY_args_t *, int); 82 83 nss_backend_t *_nss_dns_constr(dns_backend_op_t *, int); 84 extern nss_status_t _herrno2nss(int); 85 86 nss_status_t _nss_dns_gethost_withttl(void *buf, size_t bufsize, int ipnode); 87 nss_status_t _nss_get_dns_hosts_name(dns_backend_ptr_t *, void **, size_t *); 88 nss_status_t _nss_get_dns_ipnodes_name(dns_backend_ptr_t *, void **, size_t *); 89 90 #ifdef __cplusplus 91 } 92 #endif 93 94 #endif /* _DNS_COMMON_H */ 95