1 files changed, 93 insertions, 0 deletions
diff --git a/lib/dns/include/dns/soa.h b/lib/dns/include/dns/soa.h
new file mode 100644
index 0000000..4f8aa07
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+++ b/lib/dns/include/dns/soa.h
@@ -0,0 +1,93 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+/*****
+***** Module Info
+*****/
+
+/*! \file dns/soa.h
+ * \brief
+ * SOA utilities.
+ */
+
+/***
+ *** Imports
+ ***/
+
+#include <inttypes.h>
+
+#include <isc/lang.h>
+#include <isc/types.h>
+
+#include <dns/types.h>
+
+ISC_LANG_BEGINDECLS
+
+#define DNS_SOA_BUFFERSIZE ((2 * DNS_NAME_MAXWIRE) + (4 * 5))
+
+isc_result_t
+dns_soa_buildrdata(const dns_name_t *origin, const dns_name_t *contact,
+		   dns_rdataclass_t rdclass, uint32_t serial, uint32_t refresh,
+		   uint32_t retry, uint32_t expire, uint32_t minimum,
+		   unsigned char *buffer, dns_rdata_t *rdata);
+/*%<
+ * Build the rdata of an SOA record.
+ *
+ * Requires:
+ *\li   buffer  Points to a temporary buffer of at least
+ *              DNS_SOA_BUFFERSIZE bytes.
+ *\li   rdata   Points to an initialized dns_rdata_t.
+ *
+ * Ensures:
+ *  \li    *rdata       Contains a valid SOA rdata.  The 'data' member
+ *  			refers to 'buffer'.
+ */
+
+uint32_t
+dns_soa_getserial(dns_rdata_t *rdata);
+uint32_t
+dns_soa_getrefresh(dns_rdata_t *rdata);
+uint32_t
+dns_soa_getretry(dns_rdata_t *rdata);
+uint32_t
+dns_soa_getexpire(dns_rdata_t *rdata);
+uint32_t
+dns_soa_getminimum(dns_rdata_t *rdata);
+/*
+ * Extract an integer field from the rdata of a SOA record.
+ *
+ * Requires:
+ *	rdata refers to the rdata of a well-formed SOA record.
+ */
+
+void
+dns_soa_setserial(uint32_t val, dns_rdata_t *rdata);
+void
+dns_soa_setrefresh(uint32_t val, dns_rdata_t *rdata);
+void
+dns_soa_setretry(uint32_t val, dns_rdata_t *rdata);
+void
+dns_soa_setexpire(uint32_t val, dns_rdata_t *rdata);
+void
+dns_soa_setminimum(uint32_t val, dns_rdata_t *rdata);
+/*
+ * Change an integer field of a SOA record by modifying the
+ * rdata in-place.
+ *
+ * Requires:
+ *	rdata refers to the rdata of a well-formed SOA record.
+ */
+
+ISC_LANG_ENDDECLS