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
ns_listenelt_create(isc_mem_t * mctx,in_port_t port,isc_dscp_t dscp,dns_acl_t * acl,ns_listenelt_t ** target)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
ns_listenelt_destroy(ns_listenelt_t * elt)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
ns_listenlist_create(isc_mem_t * mctx,ns_listenlist_t ** target)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
destroy(ns_listenlist_t * list)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
ns_listenlist_attach(ns_listenlist_t * source,ns_listenlist_t ** target)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
ns_listenlist_detach(ns_listenlist_t ** listp)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
ns_listenlist_default(isc_mem_t * mctx,in_port_t port,isc_dscp_t dscp,isc_boolean_t enabled,ns_listenlist_t ** target)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