Add new NOTIFY record

Described in https://www.ietf.org/archive/id/draft-thomassen-dnsop-generalized-dns-notify-02.html
2023-10-30 19:14:14 +01:00
parent fe9572e27a
commit 3a394b64aa
2 changed files with 399 additions and 0 deletions
@@ -0,0 +1,373 @@
+/*
+ * 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.
+ */
+
+/* draft-thomassen-dnsop-generalized-dnsnotif-02 */
+
+#ifndef RDATA_IN_1_NOTIFY_UNDEFINED_C
+#define RDATA_IN_1_NOTIFY_UNDEFINED_C
+
+#define RRTYPE_NOTIFY_ATTRIBUTES (0)
+
+static isc_result_t
+fromtext_in_notify(ARGS_FROMTEXT) {
+	isc_token_t token;
+	dns_rdatatype_t rrtype;
+	dns_name_t name;
+	isc_buffer_t buffer;
+	bool ok;
+
+	REQUIRE(type == dns_rdatatype_notify);
+	REQUIRE(rdclass == dns_rdataclass_in);
+
+	UNUSED(rrtype);
+	UNUSED(rdclass);
+	UNUSED(callbacks);
+
+	/*
+	 * RRtype.
+	 */
+	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
+				      false));
+	RETTOK(dns_rdatatype_fromtext(&rrtype, &token.value.as_textregion));
+	RETERR(uint16_tobuffer(rrtype, target));
+
+	/*
+	 * Scheme.
+	 */
+	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
+				      false));
+	if (token.value.as_ulong > 0xffffU) {
+		RETTOK(ISC_R_RANGE);
+	}
+	RETERR(uint16_tobuffer(token.value.as_ulong, target));
+
+	/*
+	 * Port.
+	 */
+	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
+				      false));
+	if (token.value.as_ulong > 0xffffU) {
+		RETTOK(ISC_R_RANGE);
+	}
+	RETERR(uint16_tobuffer(token.value.as_ulong, target));
+
+	/*
+	 * Target.
+	 */
+	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
+				      false));
+	dns_name_init(&name, NULL);
+	buffer_fromregion(&buffer, &token.value.as_region);
+	if (origin == NULL) {
+		origin = dns_rootname;
+	}
+	RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
+	ok = true;
+	if ((options & DNS_RDATA_CHECKNAMES) != 0) {
+		ok = dns_name_ishostname(&name, false);
+	}
+	if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0) {
+		RETTOK(DNS_R_BADNAME);
+	}
+	if (!ok && callbacks != NULL) {
+		warn_badname(&name, lexer, callbacks);
+	}
+	return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+totext_in_notify(ARGS_TOTEXT) {
+	isc_region_t region;
+	dns_name_t name;
+	dns_name_t prefix;
+	char buf[sizeof("64000")];
+	uint16_t num;
+	unsigned int opts;
+
+	REQUIRE(rdata->type == dns_rdatatype_notify);
+	REQUIRE(rdata->rdclass == dns_rdataclass_in);
+	REQUIRE(rdata->length != 0);
+
+	dns_name_init(&name, NULL);
+	dns_name_init(&prefix, NULL);
+
+	/*
+	 * RRtype.
+	 */
+	dns_rdata_toregion(rdata, &region);
+	num = uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	dns_rdatatype_totext((dns_rdatatype_t)num, target);
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Scheme.
+	 */
+	num = uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	snprintf(buf, sizeof(buf), "%u", num);
+	RETERR(str_totext(buf, target));
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Port.
+	 */
+	num = uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	snprintf(buf, sizeof(buf), "%u", num);
+	RETERR(str_totext(buf, target));
+	RETERR(str_totext(" ", target));
+
+	/*
+	 * Target.
+	 */
+	dns_name_fromregion(&name, &region);
+	opts = name_prefix(&name, tctx->origin, &prefix) ? DNS_NAME_OMITFINALDOT
+							 : 0;
+	return (dns_name_totext(&prefix, opts, target));
+}
+
+static isc_result_t
+fromwire_in_notify(ARGS_FROMWIRE) {
+	dns_name_t name;
+	isc_region_t sr;
+
+	REQUIRE(type == dns_rdatatype_notify);
+	REQUIRE(rdclass == dns_rdataclass_in);
+
+	UNUSED(type);
+	UNUSED(rdclass);
+
+	dctx = dns_decompress_setpermitted(dctx, false);
+
+	dns_name_init(&name, NULL);
+
+	/*
+	 * RRtype, scheme, port.
+	 */
+	isc_buffer_activeregion(source, &sr);
+	if (sr.length < 6) {
+		return (ISC_R_UNEXPECTEDEND);
+	}
+	RETERR(mem_tobuffer(target, sr.base, 6));
+	isc_buffer_forward(source, 6);
+
+	/*
+	 * Target.
+	 */
+	return (dns_name_fromwire(&name, source, dctx, target));
+}
+
+static isc_result_t
+towire_in_notify(ARGS_TOWIRE) {
+	dns_name_t name;
+	dns_offsets_t offsets;
+	isc_region_t sr;
+
+	REQUIRE(rdata->type == dns_rdatatype_notify);
+	REQUIRE(rdata->length != 0);
+
+	dns_compress_setpermitted(cctx, false);
+	/*
+	 * RRtype, scheme, port.
+	 */
+	dns_rdata_toregion(rdata, &sr);
+	RETERR(mem_tobuffer(target, sr.base, 6));
+	isc_region_consume(&sr, 6);
+
+	/*
+	 * Target.
+	 */
+	dns_name_init(&name, offsets);
+	dns_name_fromregion(&name, &sr);
+	return (dns_name_towire(&name, cctx, target, NULL));
+}
+
+static int
+compare_in_notify(ARGS_COMPARE) {
+	dns_name_t name1;
+	dns_name_t name2;
+	isc_region_t region1;
+	isc_region_t region2;
+	int order;
+
+	REQUIRE(rdata1->type == rdata2->type);
+	REQUIRE(rdata1->rdclass == rdata2->rdclass);
+	REQUIRE(rdata1->type == dns_rdatatype_notify);
+	REQUIRE(rdata1->rdclass == dns_rdataclass_in);
+	REQUIRE(rdata1->length != 0);
+	REQUIRE(rdata2->length != 0);
+
+	/*
+	 * RRtype, scheme, port.
+	 */
+	order = memcmp(rdata1->data, rdata2->data, 6);
+	if (order != 0) {
+		return (order < 0 ? -1 : 1);
+	}
+
+	/*
+	 * Target.
+	 */
+	dns_name_init(&name1, NULL);
+	dns_name_init(&name2, NULL);
+
+	dns_rdata_toregion(rdata1, &region1);
+	dns_rdata_toregion(rdata2, &region2);
+
+	isc_region_consume(&region1, 6);
+	isc_region_consume(&region2, 6);
+
+	dns_name_fromregion(&name1, &region1);
+	dns_name_fromregion(&name2, &region2);
+
+	return (dns_name_rdatacompare(&name1, &name2));
+}
+
+static isc_result_t
+fromstruct_in_notify(ARGS_FROMSTRUCT) {
+	dns_rdata_in_notify_t *notify = source;
+	isc_region_t region;
+
+	REQUIRE(type == dns_rdatatype_notify);
+	REQUIRE(rdclass == dns_rdataclass_in);
+	REQUIRE(notify != NULL);
+	REQUIRE(notify->common.rdtype == type);
+	REQUIRE(notify->common.rdclass == rdclass);
+
+	UNUSED(type);
+	UNUSED(rdclass);
+
+	RETERR(uint16_tobuffer(notify->rrtype, target));
+	RETERR(uint16_tobuffer(notify->scheme, target));
+	RETERR(uint16_tobuffer(notify->port, target));
+	dns_name_toregion(&notify->target, &region);
+	return (isc_buffer_copyregion(target, &region));
+}
+
+static isc_result_t
+tostruct_in_notify(ARGS_TOSTRUCT) {
+	isc_region_t region;
+	dns_rdata_in_notify_t *notify = target;
+	dns_name_t name;
+
+	REQUIRE(rdata->rdclass == dns_rdataclass_in);
+	REQUIRE(rdata->type == dns_rdatatype_notify);
+	REQUIRE(notify != NULL);
+	REQUIRE(rdata->length != 0);
+
+	notify->common.rdclass = rdata->rdclass;
+	notify->common.rdtype = rdata->type;
+	ISC_LINK_INIT(&notify->common, link);
+
+	dns_name_init(&name, NULL);
+	dns_rdata_toregion(rdata, &region);
+	notify->rrtype = (dns_rdatatype_t)uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	notify->scheme = uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	notify->port = uint16_fromregion(&region);
+	isc_region_consume(&region, 2);
+	dns_name_fromregion(&name, &region);
+	dns_name_init(&notify->target, NULL);
+	name_duporclone(&name, mctx, &notify->target);
+	notify->mctx = mctx;
+	return (ISC_R_SUCCESS);
+}
+
+static void
+freestruct_in_notify(ARGS_FREESTRUCT) {
+	dns_rdata_in_notify_t *notify = source;
+
+	REQUIRE(notify != NULL);
+	REQUIRE(notify->common.rdclass == dns_rdataclass_in);
+	REQUIRE(notify->common.rdtype == dns_rdatatype_notify);
+
+	if (notify->mctx == NULL) {
+		return;
+	}
+
+	dns_name_free(&notify->target, notify->mctx);
+	notify->mctx = NULL;
+}
+
+static isc_result_t
+additionaldata_in_notify(ARGS_ADDLDATA) {
+	UNUSED(rdata);
+	UNUSED(owner);
+	UNUSED(add);
+	UNUSED(arg);
+
+	return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+digest_in_notify(ARGS_DIGEST) {
+	isc_region_t r1, r2;
+	dns_name_t name;
+
+	REQUIRE(rdata->type == dns_rdatatype_notify);
+	REQUIRE(rdata->rdclass == dns_rdataclass_in);
+
+	dns_rdata_toregion(rdata, &r1);
+	r2 = r1;
+	isc_region_consume(&r2, 6);
+	r1.length = 6;
+	RETERR((digest)(arg, &r1));
+	dns_name_init(&name, NULL);
+	dns_name_fromregion(&name, &r2);
+	return (dns_name_digest(&name, digest, arg));
+}
+
+static bool
+checkowner_in_notify(ARGS_CHECKOWNER) {
+	REQUIRE(type == dns_rdatatype_notify);
+	REQUIRE(rdclass == dns_rdataclass_in);
+
+	UNUSED(name);
+	UNUSED(type);
+	UNUSED(rdclass);
+	UNUSED(wildcard);
+
+	return (true);
+}
+
+static bool
+checknames_in_notify(ARGS_CHECKNAMES) {
+	isc_region_t region;
+	dns_name_t name;
+
+	REQUIRE(rdata->type == dns_rdatatype_notify);
+	REQUIRE(rdata->rdclass == dns_rdataclass_in);
+
+	UNUSED(owner);
+
+	dns_rdata_toregion(rdata, &region);
+	isc_region_consume(&region, 6);
+	dns_name_init(&name, NULL);
+	dns_name_fromregion(&name, &region);
+	if (!dns_name_ishostname(&name, false)) {
+		if (bad != NULL) {
+			dns_name_clone(&name, bad);
+		}
+		return (false);
+	}
+	return (true);
+}
+
+static int
+casecompare_in_notify(ARGS_COMPARE) {
+	return (compare_in_notify(rdata1, rdata2));
+}
+
+#endif /* RDATA_IN_1_NOTIFY_UNDEFINED_C */
@@ -0,0 +1,26 @@
+/*
+ * 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
+
+/*!
+ *  \brief Per draft-ietf-thomassen-dnsop-generalized-dns-notify-02
+ */
+typedef struct dns_rdata_in_notify {
+	dns_rdatacommon_t common;
+	isc_mem_t *mctx;
+	dns_rdatatype_t rrtype;
+	uint16_t scheme;
+	uint16_t port;
+	dns_name_t target;
+} dns_rdata_in_notify_t;