1 files changed, 151 insertions, 0 deletions
diff --git a/fuzz/dns_rdata_fromtext.c b/fuzz/dns_rdata_fromtext.c
new file mode 100644
index 0000000..b52a18f
--- /dev/null
+++ b/fuzz/dns_rdata_fromtext.c
@@ -0,0 +1,151 @@
+/*
+ * 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.
+ */
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <isc/attributes.h>
+#include <isc/buffer.h>
+#include <isc/commandline.h>
+#include <isc/lex.h>
+#include <isc/mem.h>
+#include <isc/print.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+#include <dns/fixedname.h>
+#include <dns/name.h>
+#include <dns/rdata.h>
+#include <dns/rdataclass.h>
+#include <dns/rdatatype.h>
+#include <dns/result.h>
+
+#include "fuzz.h"
+
+bool debug = false;
+
+int
+LLVMFuzzerInitialize(int *argc, char ***argv) {
+	UNUSED(argc);
+	UNUSED(argv);
+	return (0);
+}
+
+/* following code was copied from named-rrchecker */
+isc_lexspecials_t specials = { ['('] = 1, [')'] = 1, ['"'] = 1 };
+
+int
+LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+	isc_mem_t *mctx = NULL;
+	isc_mem_create(&mctx);
+
+	isc_lex_t *lex = NULL;
+	isc_token_t token;
+
+	isc_result_t result;
+	unsigned int options = 0;
+	dns_rdatatype_t rdtype;
+	dns_rdataclass_t rdclass;
+
+	char wiredata[64 * 1024];
+	isc_buffer_t wirebuf;
+	isc_buffer_init(&wirebuf, wiredata, sizeof(wiredata));
+
+	dns_rdata_t rdata = DNS_RDATA_INIT;
+	dns_name_t *name = NULL;
+
+	isc_buffer_t inbuf;
+	isc_buffer_constinit(&inbuf, data, size);
+	isc_buffer_add(&inbuf, size);
+	isc_buffer_setactive(&inbuf, size);
+
+	RUNTIME_CHECK(isc_lex_create(mctx, 256, &lex) == ISC_R_SUCCESS);
+
+	/*
+	 * Set up to lex DNS master file.
+	 */
+	isc_lex_setspecials(lex, specials);
+	options = ISC_LEXOPT_EOL;
+	isc_lex_setcomments(lex, ISC_LEXCOMMENT_DNSMASTERFILE);
+
+	RUNTIME_CHECK(isc_lex_openbuffer(lex, &inbuf) == ISC_R_SUCCESS);
+
+	result = isc_lex_gettoken(lex, options | ISC_LEXOPT_NUMBER, &token);
+	if (result != ISC_R_SUCCESS) {
+		goto cleanup;
+	}
+	if (token.type == isc_tokentype_eof) {
+		goto cleanup;
+	}
+	if (token.type == isc_tokentype_eol) {
+		goto cleanup;
+	}
+	/*
+	 * Get class.
+	 */
+	if (token.type == isc_tokentype_number) {
+		if (token.value.as_ulong > 0xffff) {
+			goto cleanup;
+		}
+		rdclass = (dns_rdataclass_t)token.value.as_ulong;
+	} else if (token.type == isc_tokentype_string) {
+		result = dns_rdataclass_fromtext(&rdclass,
+						 &token.value.as_textregion);
+		if (result != ISC_R_SUCCESS) {
+			goto cleanup;
+		}
+	} else {
+		goto cleanup;
+	}
+	result = isc_lex_gettoken(lex, options | ISC_LEXOPT_NUMBER, &token);
+	if (result != ISC_R_SUCCESS) {
+		goto cleanup;
+	}
+	if (token.type == isc_tokentype_eol) {
+		goto cleanup;
+	}
+	if (token.type == isc_tokentype_eof) {
+		goto cleanup;
+	}
+
+	/*
+	 * Get type.
+	 */
+	if (token.type == isc_tokentype_number) {
+		if (token.value.as_ulong > 0xffff) {
+			goto cleanup;
+		}
+		rdtype = (dns_rdatatype_t)token.value.as_ulong;
+	} else if (token.type == isc_tokentype_string) {
+		result = dns_rdatatype_fromtext(&rdtype,
+						&token.value.as_textregion);
+		if (result != ISC_R_SUCCESS) {
+			goto cleanup;
+		}
+	} else {
+		goto cleanup;
+	}
+
+	result = dns_rdata_fromtext(&rdata, rdclass, rdtype, lex, name, 0, mctx,
+				    &wirebuf, NULL);
+	if (debug) {
+		fprintf(stderr, "dns_rdata_fromtext: %s\n",
+			isc_result_totext(result));
+	}
+
+cleanup:
+	isc_lex_close(lex);
+	isc_lex_destroy(&lex);
+	isc_mem_destroy(&mctx);
+	return (0);
+}