1 /*
2 * Copyright (c) 2019, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #define MAX_ITERATIONS 100
30
31 #include <stdarg.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35
36 #include <openthread/cli.h>
37 #include <openthread/instance.h>
38 #include <openthread/ip6.h>
39 #include <openthread/link.h>
40 #include <openthread/tasklet.h>
41 #include <openthread/thread.h>
42 #include <openthread/thread_ftd.h>
43
44 #include "fuzzer_platform.h"
45 #include "common/code_utils.hpp"
46
CliOutput(void * aContext,const char * aFormat,va_list aArguments)47 static int CliOutput(void *aContext, const char *aFormat, va_list aArguments)
48 {
49 OT_UNUSED_VARIABLE(aContext);
50 OT_UNUSED_VARIABLE(aFormat);
51 OT_UNUSED_VARIABLE(aArguments);
52
53 return vsnprintf(nullptr, 0, aFormat, aArguments);
54 }
55
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)56 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
57 {
58 const otPanId panId = 0xdead;
59
60 otInstance *instance = nullptr;
61 uint8_t * buf = nullptr;
62
63 VerifyOrExit(size <= 65536);
64
65 FuzzerPlatformInit();
66
67 instance = otInstanceInitSingle();
68 otCliInit(instance, CliOutput, nullptr);
69 IgnoreError(otLinkSetPanId(instance, panId));
70 IgnoreError(otIp6SetEnabled(instance, true));
71 IgnoreError(otThreadSetEnabled(instance, true));
72 IgnoreError(otThreadBecomeLeader(instance));
73
74 buf = static_cast<uint8_t *>(malloc(size + 1));
75
76 memcpy(buf, data, size);
77 buf[size] = '\0';
78
79 otCliInputLine(reinterpret_cast<char *>(buf));
80
81 VerifyOrExit(!FuzzerPlatformResetWasRequested());
82
83 for (int i = 0; i < MAX_ITERATIONS; i++)
84 {
85 while (otTaskletsArePending(instance))
86 {
87 otTaskletsProcess(instance);
88 }
89
90 FuzzerPlatformProcess(instance);
91 }
92
93 exit:
94
95 if (buf != nullptr)
96 {
97 free(buf);
98 }
99
100 if (instance != nullptr)
101 {
102 otInstanceFinalize(instance);
103 }
104
105 return 0;
106 }
107