1  // Copyright (c) 2020-present The Bitcoin Core developers
 2  // Distributed under the MIT software license, see the accompanying
 3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 4  
 5  #include <consensus/consensus.h>
 6  #include <net.h>
 7  #include <net_processing.h>
 8  #include <primitives/transaction.h>
 9  #include <protocol.h>
10  #include <script/script.h>
11  #include <sync.h>
12  #include <test/fuzz/FuzzedDataProvider.h>
13  #include <test/fuzz/fuzz.h>
14  #include <test/fuzz/util.h>
15  #include <test/fuzz/util/net.h>
16  #include <test/util/mining.h>
17  #include <test/util/net.h>
18  #include <test/util/setup_common.h>
19  #include <test/util/validation.h>
20  #include <util/check.h>
21  #include <util/time.h>
22  #include <validationinterface.h>
23  
24  #include <cstdlib>
25  #include <iostream>
26  #include <memory>
27  #include <string>
28  #include <string_view>
29  #include <vector>
30  
31  namespace {
32  const TestingSetup* g_setup;
33  std::string_view LIMIT_TO_MESSAGE_TYPE{};
34  } // namespace
35  
36  void initialize_process_message()
37  {
38      if (const auto val{std::getenv("LIMIT_TO_MESSAGE_TYPE")}) {
39          LIMIT_TO_MESSAGE_TYPE = val;
40          Assert(std::count(ALL_NET_MESSAGE_TYPES.begin(), ALL_NET_MESSAGE_TYPES.end(), LIMIT_TO_MESSAGE_TYPE)); // Unknown message type passed
41      }
42  
43      static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>(
44              /*chain_type=*/ChainType::REGTEST,
45              {.extra_args = {"-txreconciliation"}});
46      g_setup = testing_setup.get();
47      for (int i = 0; i < 2 * COINBASE_MATURITY; i++) {
48          MineBlock(g_setup->m_node, {});
49      }
50      g_setup->m_node.validation_signals->SyncWithValidationInterfaceQueue();
51  }
52  
53  FUZZ_TARGET(process_message, .init = initialize_process_message)
54  {
55      SeedRandomStateForTest(SeedRand::ZEROS);
56      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
57  
58      ConnmanTestMsg& connman = *static_cast<ConnmanTestMsg*>(g_setup->m_node.connman.get());
59      auto& chainman = static_cast<TestChainstateManager&>(*g_setup->m_node.chainman);
60      SetMockTime(1610000000); // any time to successfully reset ibd
61      chainman.ResetIbd();
62  
63      LOCK(NetEventsInterface::g_msgproc_mutex);
64  
65      const std::string random_message_type{fuzzed_data_provider.ConsumeBytesAsString(CMessageHeader::MESSAGE_TYPE_SIZE).c_str()};
66      if (!LIMIT_TO_MESSAGE_TYPE.empty() && random_message_type != LIMIT_TO_MESSAGE_TYPE) {
67          return;
68      }
69      CNode& p2p_node = *ConsumeNodeAsUniquePtr(fuzzed_data_provider).release();
70  
71      connman.AddTestNode(p2p_node);
72      FillNode(fuzzed_data_provider, connman, p2p_node);
73  
74      const auto mock_time = ConsumeTime(fuzzed_data_provider);
75      SetMockTime(mock_time);
76  
77      CSerializedNetMsg net_msg;
78      net_msg.m_type = random_message_type;
79      net_msg.data = ConsumeRandomLengthByteVector(fuzzed_data_provider, MAX_PROTOCOL_MESSAGE_LENGTH);
80  
81      connman.FlushSendBuffer(p2p_node);
82      (void)connman.ReceiveMsgFrom(p2p_node, std::move(net_msg));
83  
84      bool more_work{true};
85      while (more_work) {
86          p2p_node.fPauseSend = false;
87          try {
88              more_work = connman.ProcessMessagesOnce(p2p_node);
89          } catch (const std::ios_base::failure&) {
90          }
91          g_setup->m_node.peerman->SendMessages(&p2p_node);
92      }
93      g_setup->m_node.validation_signals->SyncWithValidationInterfaceQueue();
94      g_setup->m_node.connman->StopNodes();
95  }