1 /* $NetBSD: listenlist.c,v 1.5 2014/12/10 04:37:51 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2005, 2007, 2013 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 2000, 2001 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* Id: listenlist.c,v 1.14 2007/06/19 23:46:59 tbox Exp */ 21 22 /*! \file */ 23 24 #include <config.h> 25 26 #include <isc/mem.h> 27 #include <isc/util.h> 28 29 #include <dns/acl.h> 30 31 #include <named/listenlist.h> 32 33 static void 34 destroy(ns_listenlist_t *list); 35 36 isc_result_t 37 ns_listenelt_create(isc_mem_t *mctx, in_port_t port, isc_dscp_t dscp, 38 dns_acl_t *acl, ns_listenelt_t **target) 39 { 40 ns_listenelt_t *elt = NULL; 41 REQUIRE(target != NULL && *target == NULL); 42 elt = isc_mem_get(mctx, sizeof(*elt)); 43 if (elt == NULL) 44 return (ISC_R_NOMEMORY); 45 elt->mctx = mctx; 46 ISC_LINK_INIT(elt, link); 47 elt->port = port; 48 elt->dscp = dscp; 49 elt->acl = acl; 50 *target = elt; 51 return (ISC_R_SUCCESS); 52 } 53 54 void 55 ns_listenelt_destroy(ns_listenelt_t *elt) { 56 if (elt->acl != NULL) 57 dns_acl_detach(&elt->acl); 58 isc_mem_put(elt->mctx, elt, sizeof(*elt)); 59 } 60 61 isc_result_t 62 ns_listenlist_create(isc_mem_t *mctx, ns_listenlist_t **target) { 63 ns_listenlist_t *list = NULL; 64 REQUIRE(target != NULL && *target == NULL); 65 list = isc_mem_get(mctx, sizeof(*list)); 66 if (list == NULL) 67 return (ISC_R_NOMEMORY); 68 list->mctx = mctx; 69 list->refcount = 1; 70 ISC_LIST_INIT(list->elts); 71 *target = list; 72 return (ISC_R_SUCCESS); 73 } 74 75 static void 76 destroy(ns_listenlist_t *list) { 77 ns_listenelt_t *elt, *next; 78 for (elt = ISC_LIST_HEAD(list->elts); 79 elt != NULL; 80 elt = next) 81 { 82 next = ISC_LIST_NEXT(elt, link); 83 ns_listenelt_destroy(elt); 84 } 85 isc_mem_put(list->mctx, list, sizeof(*list)); 86 } 87 88 void 89 ns_listenlist_attach(ns_listenlist_t *source, ns_listenlist_t **target) { 90 INSIST(source->refcount > 0); 91 source->refcount++; 92 *target = source; 93 } 94 95 void 96 ns_listenlist_detach(ns_listenlist_t **listp) { 97 ns_listenlist_t *list = *listp; 98 INSIST(list->refcount > 0); 99 list->refcount--; 100 if (list->refcount == 0) 101 destroy(list); 102 *listp = NULL; 103 } 104 105 isc_result_t 106 ns_listenlist_default(isc_mem_t *mctx, in_port_t port, isc_dscp_t dscp, 107 isc_boolean_t enabled, ns_listenlist_t **target) 108 { 109 isc_result_t result; 110 dns_acl_t *acl = NULL; 111 ns_listenelt_t *elt = NULL; 112 ns_listenlist_t *list = NULL; 113 114 REQUIRE(target != NULL && *target == NULL); 115 if (enabled) 116 result = dns_acl_any(mctx, &acl); 117 else 118 result = dns_acl_none(mctx, &acl); 119 if (result != ISC_R_SUCCESS) 120 goto cleanup; 121 122 result = ns_listenelt_create(mctx, port, dscp, acl, &elt); 123 if (result != ISC_R_SUCCESS) 124 goto cleanup_acl; 125 126 result = ns_listenlist_create(mctx, &list); 127 if (result != ISC_R_SUCCESS) 128 goto cleanup_listenelt; 129 130 ISC_LIST_APPEND(list->elts, elt, link); 131 132 *target = list; 133 return (ISC_R_SUCCESS); 134 135 cleanup_listenelt: 136 ns_listenelt_destroy(elt); 137 cleanup_acl: 138 dns_acl_detach(&acl); 139 cleanup: 140 return (result); 141 } 142