1 /* $NetBSD: isc_lex_getmastertoken.c,v 1.3 2025/01/26 16:25:20 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 #include <stddef.h> 17 #include <stdint.h> 18 19 #include <isc/buffer.h> 20 #include <isc/lex.h> 21 #include <isc/mem.h> 22 #include <isc/string.h> 23 #include <isc/util.h> 24 25 #include "fuzz.h" 26 27 bool debug = false; 28 29 int 30 LLVMFuzzerInitialize(int *argc ISC_ATTR_UNUSED, char ***argv ISC_ATTR_UNUSED); 31 32 int 33 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size); 34 35 static isc_mem_t *mctx = NULL; 36 static isc_lex_t *lex = NULL; 37 38 int 39 LLVMFuzzerInitialize(int *argc ISC_ATTR_UNUSED, char ***argv ISC_ATTR_UNUSED) { 40 isc_mem_create(&mctx); 41 isc_lex_create(mctx, 1024, &lex); 42 43 return 0; 44 } 45 46 int 47 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { 48 isc_buffer_t buf; 49 isc_result_t result; 50 isc_token_t token; 51 isc_tokentype_t expect; 52 bool eol; 53 54 if (size < sizeof(expect) + sizeof(eol)) { 55 return 0; 56 } 57 58 (void)memmove(&expect, data, sizeof(expect)); 59 data += sizeof(expect); 60 size -= sizeof(expect); 61 62 eol = *data != 0; 63 data += 1; 64 size -= 1; 65 66 isc_buffer_constinit(&buf, data, size); 67 isc_buffer_add(&buf, size); 68 isc_buffer_setactive(&buf, size); 69 70 CHECK(isc_lex_openbuffer(lex, &buf)); 71 72 do { 73 result = isc_lex_getmastertoken(lex, &token, expect, eol); 74 } while (result == ISC_R_SUCCESS && token.type != isc_tokentype_eof); 75 76 return 0; 77 } 78