1/* 2 * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 2000, 2001 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* $Id: listenlist.c,v 1.14 2007/06/19 23:46:59 tbox Exp $ */ 19 20/*! \file */ 21 22#include <config.h> 23 24#include <isc/mem.h> 25#include <isc/util.h> 26 27#include <dns/acl.h> 28 29#include <named/listenlist.h> 30 31static void 32destroy(ns_listenlist_t *list); 33 34isc_result_t 35ns_listenelt_create(isc_mem_t *mctx, in_port_t port, 36 dns_acl_t *acl, ns_listenelt_t **target) 37{ 38 ns_listenelt_t *elt = NULL; 39 REQUIRE(target != NULL && *target == NULL); 40 elt = isc_mem_get(mctx, sizeof(*elt)); 41 if (elt == NULL) 42 return (ISC_R_NOMEMORY); 43 elt->mctx = mctx; 44 ISC_LINK_INIT(elt, link); 45 elt->port = port; 46 elt->acl = acl; 47 *target = elt; 48 return (ISC_R_SUCCESS); 49} 50 51void 52ns_listenelt_destroy(ns_listenelt_t *elt) { 53 if (elt->acl != NULL) 54 dns_acl_detach(&elt->acl); 55 isc_mem_put(elt->mctx, elt, sizeof(*elt)); 56} 57 58isc_result_t 59ns_listenlist_create(isc_mem_t *mctx, ns_listenlist_t **target) { 60 ns_listenlist_t *list = NULL; 61 REQUIRE(target != NULL && *target == NULL); 62 list = isc_mem_get(mctx, sizeof(*list)); 63 if (list == NULL) 64 return (ISC_R_NOMEMORY); 65 list->mctx = mctx; 66 list->refcount = 1; 67 ISC_LIST_INIT(list->elts); 68 *target = list; 69 return (ISC_R_SUCCESS); 70} 71 72static void 73destroy(ns_listenlist_t *list) { 74 ns_listenelt_t *elt, *next; 75 for (elt = ISC_LIST_HEAD(list->elts); 76 elt != NULL; 77 elt = next) 78 { 79 next = ISC_LIST_NEXT(elt, link); 80 ns_listenelt_destroy(elt); 81 } 82 isc_mem_put(list->mctx, list, sizeof(*list)); 83} 84 85void 86ns_listenlist_attach(ns_listenlist_t *source, ns_listenlist_t **target) { 87 INSIST(source->refcount > 0); 88 source->refcount++; 89 *target = source; 90} 91 92void 93ns_listenlist_detach(ns_listenlist_t **listp) { 94 ns_listenlist_t *list = *listp; 95 INSIST(list->refcount > 0); 96 list->refcount--; 97 if (list->refcount == 0) 98 destroy(list); 99 *listp = NULL; 100} 101 102isc_result_t 103ns_listenlist_default(isc_mem_t *mctx, in_port_t port, 104 isc_boolean_t enabled, ns_listenlist_t **target) 105{ 106 isc_result_t result; 107 dns_acl_t *acl = NULL; 108 ns_listenelt_t *elt = NULL; 109 ns_listenlist_t *list = NULL; 110 111 REQUIRE(target != NULL && *target == NULL); 112 if (enabled) 113 result = dns_acl_any(mctx, &acl); 114 else 115 result = dns_acl_none(mctx, &acl); 116 if (result != ISC_R_SUCCESS) 117 goto cleanup; 118 119 result = ns_listenelt_create(mctx, port, acl, &elt); 120 if (result != ISC_R_SUCCESS) 121 goto cleanup_acl; 122 123 result = ns_listenlist_create(mctx, &list); 124 if (result != ISC_R_SUCCESS) 125 goto cleanup_listenelt; 126 127 ISC_LIST_APPEND(list->elts, elt, link); 128 129 *target = list; 130 return (ISC_R_SUCCESS); 131 132 cleanup_listenelt: 133 ns_listenelt_destroy(elt); 134 cleanup_acl: 135 dns_acl_detach(&acl); 136 cleanup: 137 return (result); 138} 139