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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <stdbool.h>
#include <isc/mem.h>
#include <isc/util.h>
#include <dns/acl.h>
#include <ns/listenlist.h>
static void
destroy(ns_listenlist_t *list);
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) {
ns_listenelt_t *elt = NULL;
REQUIRE(target != NULL && *target == NULL);
elt = isc_mem_get(mctx, sizeof(*elt));
elt->mctx = mctx;
ISC_LINK_INIT(elt, link);
elt->port = port;
elt->dscp = dscp;
elt->acl = acl;
*target = elt;
return (ISC_R_SUCCESS);
}
void
ns_listenelt_destroy(ns_listenelt_t *elt) {
if (elt->acl != NULL) {
dns_acl_detach(&elt->acl);
}
isc_mem_put(elt->mctx, elt, sizeof(*elt));
}
isc_result_t
ns_listenlist_create(isc_mem_t *mctx, ns_listenlist_t **target) {
ns_listenlist_t *list = NULL;
REQUIRE(target != NULL && *target == NULL);
list = isc_mem_get(mctx, sizeof(*list));
list->mctx = mctx;
list->refcount = 1;
ISC_LIST_INIT(list->elts);
*target = list;
return (ISC_R_SUCCESS);
}
static void
destroy(ns_listenlist_t *list) {
ns_listenelt_t *elt, *next;
for (elt = ISC_LIST_HEAD(list->elts); elt != NULL; elt = next) {
next = ISC_LIST_NEXT(elt, link);
ns_listenelt_destroy(elt);
}
isc_mem_put(list->mctx, list, sizeof(*list));
}
void
ns_listenlist_attach(ns_listenlist_t *source, ns_listenlist_t **target) {
INSIST(source->refcount > 0);
source->refcount++;
*target = source;
}
void
ns_listenlist_detach(ns_listenlist_t **listp) {
ns_listenlist_t *list = *listp;
*listp = NULL;
INSIST(list->refcount > 0);
list->refcount--;
if (list->refcount == 0) {
destroy(list);
}
}
isc_result_t
ns_listenlist_default(isc_mem_t *mctx, in_port_t port, isc_dscp_t dscp,
bool enabled, ns_listenlist_t **target) {
isc_result_t result;
dns_acl_t *acl = NULL;
ns_listenelt_t *elt = NULL;
ns_listenlist_t *list = NULL;
REQUIRE(target != NULL && *target == NULL);
if (enabled) {
result = dns_acl_any(mctx, &acl);
} else {
result = dns_acl_none(mctx, &acl);
}
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
result = ns_listenelt_create(mctx, port, dscp, acl, &elt);
if (result != ISC_R_SUCCESS) {
goto cleanup_acl;
}
result = ns_listenlist_create(mctx, &list);
if (result != ISC_R_SUCCESS) {
goto cleanup_listenelt;
}
ISC_LIST_APPEND(list->elts, elt, link);
*target = list;
return (ISC_R_SUCCESS);
cleanup_listenelt:
ns_listenelt_destroy(elt);
cleanup_acl:
dns_acl_detach(&acl);
cleanup:
return (result);
}
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