text: /*
   *  Copyright (c) 2019, The OpenThread Authors.
   *  All rights reserved.
   *
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions are met:
   *  1. Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *  3. Neither the name of the copyright holder nor the
   *     names of its contributors may be used to endorse or promote products
   *     derived from this software without specific prior written permission.
   *
   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   *  POSSIBILITY OF SUCH DAMAGE.
   */
  
  #define MAX_ITERATIONS 100
  
  #include <stdarg.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include <openthread/cli.h>
  #include <openthread/instance.h>
  #include <openthread/ip6.h>
  #include <openthread/link.h>
  #include <openthread/tasklet.h>
  #include <openthread/thread.h>
  #include <openthread/thread_ftd.h>
  
  #include "fuzzer_platform.h"
  #include "common/code_utils.hpp"
  
  static int CliOutput(void *aContext, const char *aFormat, va_list aArguments)
  {
      OT_UNUSED_VARIABLE(aContext);
      OT_UNUSED_VARIABLE(aFormat);
      OT_UNUSED_VARIABLE(aArguments);
  
      return vsnprintf(nullptr, 0, aFormat, aArguments);
  }
  
  extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  {
      const otPanId panId = 0xdead;
  
      otInstance *instance = nullptr;
      uint8_t *   buf      = nullptr;
  
      VerifyOrExit(size <= 65536);
  
      FuzzerPlatformInit();
  
      instance = otInstanceInitSingle();
      otCliInit(instance, CliOutput, nullptr);
      IgnoreError(otLinkSetPanId(instance, panId));
      IgnoreError(otIp6SetEnabled(instance, true));
      IgnoreError(otThreadSetEnabled(instance, true));
      IgnoreError(otThreadBecomeLeader(instance));
  
      buf = static_cast<uint8_t *>(malloc(size + 1));
  
      memcpy(buf, data, size);
      buf[size] = '\0';
  
      otCliInputLine(reinterpret_cast<char *>(buf));
  
      VerifyOrExit(!FuzzerPlatformResetWasRequested());
  
      for (int i = 0; i < MAX_ITERATIONS; i++)
      {
          while (otTaskletsArePending(instance))
          {
              otTaskletsProcess(instance);
          }
  
          FuzzerPlatformProcess(instance);
      }
  
  exit:
  
      if (buf != nullptr)
      {
          free(buf);
      }
  
      if (instance != nullptr)
      {
          otInstanceFinalize(instance);
      }
  
      return 0;
  }
  