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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.
*/
#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);
}
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