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 #include <stdarg.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include <openthread/cli.h>
35 #include <openthread/instance.h>
36 #include <openthread/ip6.h>
37 #include <openthread/link.h>
38 #include <openthread/tasklet.h>
39 #include <openthread/thread.h>
40 #include <openthread/thread_ftd.h>
41 #include <openthread/platform/alarm-milli.h>
42
43 #include "fuzzer_platform.h"
44 #include "common/code_utils.hpp"
45 #include "common/time.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
AdvanceTime(otInstance * aInstance,uint32_t aDuration)56 void AdvanceTime(otInstance *aInstance, uint32_t aDuration)
57 {
58 uint32_t time = otPlatAlarmMilliGetNow() + aDuration;
59
60 while (ot::TimeMilli(otPlatAlarmMilliGetNow()) <= ot::TimeMilli(time))
61 {
62 while (otTaskletsArePending(aInstance))
63 {
64 otTaskletsProcess(aInstance);
65 }
66
67 FuzzerPlatformProcess(aInstance);
68 }
69 }
70
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)71 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
72 {
73 const otPanId panId = 0xdead;
74
75 otInstance *instance = nullptr;
76 uint8_t *buf = nullptr;
77
78 VerifyOrExit(size <= 65536);
79
80 FuzzerPlatformInit();
81
82 instance = otInstanceInitSingle();
83 otCliInit(instance, CliOutput, nullptr);
84 IgnoreError(otLinkSetPanId(instance, panId));
85 IgnoreError(otIp6SetEnabled(instance, true));
86 IgnoreError(otThreadSetEnabled(instance, true));
87 IgnoreError(otThreadBecomeLeader(instance));
88
89 AdvanceTime(instance, 10000);
90
91 buf = static_cast<uint8_t *>(malloc(size + 1));
92 memcpy(buf, data, size);
93 buf[size] = '\0';
94
95 otCliInputLine(reinterpret_cast<char *>(buf));
96
97 VerifyOrExit(!FuzzerPlatformResetWasRequested());
98
99 AdvanceTime(instance, 10000);
100
101 exit:
102
103 if (buf != nullptr)
104 {
105 free(buf);
106 }
107
108 if (instance != nullptr)
109 {
110 otInstanceFinalize(instance);
111 }
112
113 return 0;
114 }
115