Adding upstream version 1:9.11.5.P4+dfsg.upstream/1%9.11.5.P4+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 163 insertions, 0 deletions

diff --git a/lib/dns/order.c b/lib/dns/order.c
new file mode 100644
index 0000000..6ffc4a0
--- /dev/null
+++ b/lib/dns/order.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * 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 http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/* $Id: order.c,v 1.10 2007/06/19 23:47:16 tbox Exp $ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <stdbool.h>
+
+#include <isc/magic.h>
+#include <isc/mem.h>
+#include <isc/types.h>
+#include <isc/util.h>
+#include <isc/refcount.h>
+
+#include <dns/fixedname.h>
+#include <dns/name.h>
+#include <dns/order.h>
+#include <dns/rdataset.h>
+#include <dns/types.h>
+
+typedef struct dns_order_ent dns_order_ent_t;
+struct dns_order_ent {
+	dns_fixedname_t			name;
+	dns_rdataclass_t		rdclass;
+	dns_rdatatype_t			rdtype;
+	unsigned int			mode;
+	ISC_LINK(dns_order_ent_t)	link;
+};
+
+struct dns_order {
+	unsigned int			magic;
+	isc_refcount_t          	references;
+	ISC_LIST(dns_order_ent_t)	ents;
+	isc_mem_t			*mctx;
+};
+
+#define DNS_ORDER_MAGIC ISC_MAGIC('O','r','d','r')
+#define DNS_ORDER_VALID(order)	ISC_MAGIC_VALID(order, DNS_ORDER_MAGIC)
+
+isc_result_t
+dns_order_create(isc_mem_t *mctx, dns_order_t **orderp) {
+	dns_order_t *order;
+	isc_result_t result;
+
+	REQUIRE(orderp != NULL && *orderp == NULL);
+
+	order = isc_mem_get(mctx, sizeof(*order));
+	if (order == NULL)
+		return (ISC_R_NOMEMORY);
+
+	ISC_LIST_INIT(order->ents);
+
+	/* Implicit attach. */
+	result = isc_refcount_init(&order->references, 1);
+	if (result != ISC_R_SUCCESS) {
+		isc_mem_put(mctx, order, sizeof(*order));
+		return (result);
+	}
+
+	order->mctx = NULL;
+	isc_mem_attach(mctx, &order->mctx);
+	order->magic = DNS_ORDER_MAGIC;
+	*orderp = order;
+	return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+dns_order_add(dns_order_t *order, dns_name_t *name,
+	      dns_rdatatype_t rdtype, dns_rdataclass_t rdclass,
+	      unsigned int mode)
+{
+	dns_order_ent_t *ent;
+
+	REQUIRE(DNS_ORDER_VALID(order));
+	REQUIRE(mode == DNS_RDATASETATTR_RANDOMIZE ||
+		mode == DNS_RDATASETATTR_FIXEDORDER ||
+		mode == 0 /* DNS_RDATASETATTR_CYCLIC */ );
+
+	ent = isc_mem_get(order->mctx, sizeof(*ent));
+	if (ent == NULL)
+		return (ISC_R_NOMEMORY);
+
+	dns_fixedname_init(&ent->name);
+	RUNTIME_CHECK(dns_name_copy(name, dns_fixedname_name(&ent->name), NULL)
+		      == ISC_R_SUCCESS);
+	ent->rdtype = rdtype;
+	ent->rdclass = rdclass;
+	ent->mode = mode;
+	ISC_LINK_INIT(ent, link);
+	ISC_LIST_INITANDAPPEND(order->ents, ent, link);
+	return (ISC_R_SUCCESS);
+}
+
+static inline bool
+match(dns_name_t *name1, dns_name_t *name2) {
+
+	if (dns_name_iswildcard(name2))
+		return(dns_name_matcheswildcard(name1, name2));
+	return (dns_name_equal(name1, name2));
+}
+
+unsigned int
+dns_order_find(dns_order_t *order, dns_name_t *name,
+	       dns_rdatatype_t rdtype, dns_rdataclass_t rdclass)
+{
+	dns_order_ent_t *ent;
+	REQUIRE(DNS_ORDER_VALID(order));
+
+	for (ent = ISC_LIST_HEAD(order->ents);
+	     ent != NULL;
+	     ent = ISC_LIST_NEXT(ent, link)) {
+		if (ent->rdtype != rdtype && ent->rdtype != dns_rdatatype_any)
+			continue;
+		if (ent->rdclass != rdclass &&
+		    ent->rdclass != dns_rdataclass_any)
+			continue;
+		if (match(name, dns_fixedname_name(&ent->name)))
+			return (ent->mode);
+	}
+	return (DNS_RDATASETATTR_RANDOMIZE);
+}
+
+void
+dns_order_attach(dns_order_t *source, dns_order_t **target) {
+	REQUIRE(DNS_ORDER_VALID(source));
+	REQUIRE(target != NULL && *target == NULL);
+	isc_refcount_increment(&source->references, NULL);
+	*target = source;
+}
+
+void
+dns_order_detach(dns_order_t **orderp) {
+	dns_order_t *order;
+	dns_order_ent_t *ent;
+	unsigned int references;
+
+	REQUIRE(orderp != NULL);
+	order = *orderp;
+	REQUIRE(DNS_ORDER_VALID(order));
+	isc_refcount_decrement(&order->references, &references);
+	*orderp = NULL;
+	if (references != 0)
+		return;
+
+	order->magic = 0;
+	while ((ent = ISC_LIST_HEAD(order->ents)) != NULL) {
+		ISC_LIST_UNLINK(order->ents, ent, link);
+		isc_mem_put(order->mctx, ent, sizeof(*ent));
+	}
+	isc_refcount_destroy(&order->references);
+	isc_mem_putanddetach(&order->mctx, order, sizeof(*order));
+}