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 <protocol.h>
 9  #include <script/script.h>
10  #include <sync.h>
11  #include <test/fuzz/FuzzedDataProvider.h>
12  #include <test/fuzz/fuzz.h>
13  #include <test/fuzz/util.h>
14  #include <test/fuzz/util/net.h>
15  #include <test/util/mining.h>
16  #include <test/util/net.h>
17  #include <test/util/setup_common.h>
18  #include <test/util/validation.h>
19  #include <util/time.h>
20  #include <validationinterface.h>
21  
22  #include <ios>
23  #include <string>
24  #include <utility>
25  #include <vector>
26  
27  namespace {
28  const TestingSetup* g_setup;
29  } // namespace
30  
31  void initialize_process_messages()
32  {
33      static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>(
34              /*chain_type=*/ChainType::REGTEST,
35              /*extra_args=*/{"-txreconciliation"});
36      g_setup = testing_setup.get();
37      for (int i = 0; i < 2 * COINBASE_MATURITY; i++) {
38          MineBlock(g_setup->m_node, CScript() << OP_TRUE);
39      }
40      g_setup->m_node.validation_signals->SyncWithValidationInterfaceQueue();
41  }
42  
43  FUZZ_TARGET(process_messages, .init = initialize_process_messages)
44  {
45      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
46  
47      ConnmanTestMsg& connman = *static_cast<ConnmanTestMsg*>(g_setup->m_node.connman.get());
48      auto& chainman = static_cast<TestChainstateManager&>(*g_setup->m_node.chainman);
49      SetMockTime(1610000000); // any time to successfully reset ibd
50      chainman.ResetIbd();
51  
52      LOCK(NetEventsInterface::g_msgproc_mutex);
53  
54      std::vector<CNode*> peers;
55      const auto num_peers_to_add = fuzzed_data_provider.ConsumeIntegralInRange(1, 3);
56      for (int i = 0; i < num_peers_to_add; ++i) {
57          peers.push_back(ConsumeNodeAsUniquePtr(fuzzed_data_provider, i).release());
58          CNode& p2p_node = *peers.back();
59  
60          FillNode(fuzzed_data_provider, connman, p2p_node);
61  
62          connman.AddTestNode(p2p_node);
63      }
64  
65      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 30)
66      {
67          const std::string random_message_type{fuzzed_data_provider.ConsumeBytesAsString(CMessageHeader::COMMAND_SIZE).c_str()};
68  
69          const auto mock_time = ConsumeTime(fuzzed_data_provider);
70          SetMockTime(mock_time);
71  
72          CSerializedNetMsg net_msg;
73          net_msg.m_type = random_message_type;
74          net_msg.data = ConsumeRandomLengthByteVector(fuzzed_data_provider, MAX_PROTOCOL_MESSAGE_LENGTH);
75  
76          CNode& random_node = *PickValue(fuzzed_data_provider, peers);
77  
78          connman.FlushSendBuffer(random_node);
79          (void)connman.ReceiveMsgFrom(random_node, std::move(net_msg));
80  
81          bool more_work{true};
82          while (more_work) { // Ensure that every message is eventually processed in some way or another
83              random_node.fPauseSend = false;
84  
85              try {
86                  more_work = connman.ProcessMessagesOnce(random_node);
87              } catch (const std::ios_base::failure&) {
88              }
89              g_setup->m_node.peerman->SendMessages(&random_node);
90          }
91      }
92      g_setup->m_node.validation_signals->SyncWithValidationInterfaceQueue();
93      g_setup->m_node.connman->StopNodes();
94  }