text: // Copyright (c) 2020 The Bitcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include <banman.h>
  #include <chainparams.h>
  #include <consensus/consensus.h>
  #include <net.h>
  #include <net_processing.h>
  #include <protocol.h>
  #include <scheduler.h>
  #include <script/script.h>
  #include <streams.h>
  #include <test/fuzz/FuzzedDataProvider.h>
  #include <test/fuzz/fuzz.h>
  #include <test/util/mining.h>
  #include <test/util/setup_common.h>
  #include <util/memory.h>
  #include <validationinterface.h>
  #include <version.h>
  
  #include <algorithm>
  #include <atomic>
  #include <cassert>
  #include <chrono>
  #include <cstdint>
  #include <iosfwd>
  #include <iostream>
  #include <map>
  #include <memory>
  #include <set>
  #include <string>
  #include <vector>
  
  bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CConnman* connman, BanMan* banman, const std::atomic<bool>& interruptMsgProc);
  
  namespace {
  
  #ifdef MESSAGE_TYPE
  #define TO_STRING_(s) #s
  #define TO_STRING(s) TO_STRING_(s)
  const std::string LIMIT_TO_MESSAGE_TYPE{TO_STRING(MESSAGE_TYPE)};
  #else
  const std::string LIMIT_TO_MESSAGE_TYPE;
  #endif
  
  const std::map<std::string, std::set<std::string>> EXPECTED_DESERIALIZATION_EXCEPTIONS = {
      {"CDataStream::read(): end of data: iostream error", {"addr", "block", "blocktxn", "cmpctblock", "feefilter", "filteradd", "filterload", "getblocks", "getblocktxn", "getdata", "getheaders", "headers", "inv", "notfound", "ping", "sendcmpct", "tx"}},
      {"CompactSize exceeds limit of type: iostream error", {"cmpctblock"}},
      {"differential value overflow: iostream error", {"getblocktxn"}},
      {"index overflowed 16 bits: iostream error", {"getblocktxn"}},
      {"index overflowed 16-bits: iostream error", {"cmpctblock"}},
      {"indexes overflowed 16 bits: iostream error", {"getblocktxn"}},
      {"non-canonical ReadCompactSize(): iostream error", {"addr", "block", "blocktxn", "cmpctblock", "filteradd", "filterload", "getblocks", "getblocktxn", "getdata", "getheaders", "headers", "inv", "notfound", "tx"}},
      {"ReadCompactSize(): size too large: iostream error", {"addr", "block", "blocktxn", "cmpctblock", "filteradd", "filterload", "getblocks", "getblocktxn", "getdata", "getheaders", "headers", "inv", "notfound", "tx"}},
      {"Superfluous witness record: iostream error", {"block", "blocktxn", "cmpctblock", "tx"}},
      {"Unknown transaction optional data: iostream error", {"block", "blocktxn", "cmpctblock", "tx"}},
  };
  
  const RegTestingSetup* g_setup;
  } // namespace
  
  void initialize()
  {
      static RegTestingSetup setup{};
      g_setup = &setup;
  
      for (int i = 0; i < 2 * COINBASE_MATURITY; i++) {
          MineBlock(g_setup->m_node, CScript() << OP_TRUE);
      }
      SyncWithValidationInterfaceQueue();
  }
  
  void test_one_input(const std::vector<uint8_t>& buffer)
  {
      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
      const std::string random_message_type{fuzzed_data_provider.ConsumeBytesAsString(CMessageHeader::COMMAND_SIZE).c_str()};
      if (!LIMIT_TO_MESSAGE_TYPE.empty() && random_message_type != LIMIT_TO_MESSAGE_TYPE) {
          return;
      }
      CDataStream random_bytes_data_stream{fuzzed_data_provider.ConsumeRemainingBytes<unsigned char>(), SER_NETWORK, PROTOCOL_VERSION};
      CNode p2p_node{0, ServiceFlags(NODE_NETWORK | NODE_WITNESS | NODE_BLOOM), 0, INVALID_SOCKET, CAddress{CService{in_addr{0x0100007f}, 7777}, NODE_NETWORK}, 0, 0, CAddress{}, std::string{}, false};
      p2p_node.fSuccessfullyConnected = true;
      p2p_node.nVersion = PROTOCOL_VERSION;
      p2p_node.SetSendVersion(PROTOCOL_VERSION);
      g_setup->m_node.peer_logic->InitializeNode(&p2p_node);
      try {
          (void)ProcessMessage(&p2p_node, random_message_type, random_bytes_data_stream, GetTimeMillis(), Params(), g_setup->m_node.connman.get(), g_setup->m_node.banman.get(), std::atomic<bool>{false});
      } catch (const std::ios_base::failure& e) {
          const std::string exception_message{e.what()};
          const auto p = EXPECTED_DESERIALIZATION_EXCEPTIONS.find(exception_message);
          if (p == EXPECTED_DESERIALIZATION_EXCEPTIONS.cend() || p->second.count(random_message_type) == 0) {
              std::cout << "Unexpected exception when processing message type \"" << random_message_type << "\": " << exception_message << std::endl;
              assert(false);
          }
      }
      SyncWithValidationInterfaceQueue();
  }
  