/* $NetBSD: dns_rdata_fromtext.c,v 1.2.4.2 2024/02/29 12:33:43 martin Exp $ */ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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); }