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 <chainparams.h>
  6  #include <net.h>
  7  #include <net_permissions.h>
  8  #include <netaddress.h>
  9  #include <protocol.h>
 10  #include <random.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/net.h>
 16  #include <test/util/setup_common.h>
 17  #include <util/asmap.h>
 18  #include <util/chaintype.h>
 19  #include <util/time.h>
 20  
 21  #include <cstdint>
 22  #include <optional>
 23  #include <string>
 24  #include <vector>
 25  
 26  void initialize_net()
 27  {
 28      static const auto testing_setup = MakeNoLogFileContext<>(ChainType::MAIN);
 29  }
 30  
 31  FUZZ_TARGET(net, .init = initialize_net)
 32  {
 33      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
 34      SetMockTime(ConsumeTime(fuzzed_data_provider));
 35      CNode node{ConsumeNode(fuzzed_data_provider)};
 36      node.SetCommonVersion(fuzzed_data_provider.ConsumeIntegral<int>());
 37      if (const auto service_opt =
 38              ConsumeDeserializable<CService>(fuzzed_data_provider, ConsumeDeserializationParams<CNetAddr::SerParams>(fuzzed_data_provider)))
 39      {
 40          node.SetAddrLocal(*service_opt);
 41      }
 42      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
 43          CallOneOf(
 44              fuzzed_data_provider,
 45              [&] {
 46                  node.CloseSocketDisconnect();
 47              },
 48              [&] {
 49                  CNodeStats stats;
 50                  node.CopyStats(stats);
 51              },
 52              [&] {
 53                  const CNode* add_ref_node = node.AddRef();
 54                  assert(add_ref_node == &node);
 55              },
 56              [&] {
 57                  if (node.GetRefCount() > 0) {
 58                      node.Release();
 59                  }
 60              },
 61              [&] {
 62                  const std::vector<uint8_t> b = ConsumeRandomLengthByteVector(fuzzed_data_provider);
 63                  bool complete;
 64                  node.ReceiveMsgBytes(b, complete);
 65              });
 66      }
 67  
 68      (void)node.GetAddrLocal();
 69      (void)node.GetId();
 70      (void)node.GetLocalNonce();
 71      const int ref_count = node.GetRefCount();
 72      assert(ref_count >= 0);
 73      (void)node.GetCommonVersion();
 74  
 75      const NetPermissionFlags net_permission_flags = ConsumeWeakEnum(fuzzed_data_provider, ALL_NET_PERMISSION_FLAGS);
 76      (void)node.HasPermission(net_permission_flags);
 77      (void)node.ConnectedThroughNetwork();
 78  }
 79  
 80  FUZZ_TARGET(local_address, .init = initialize_net)
 81  {
 82      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
 83      SetMockTime(ConsumeTime(fuzzed_data_provider));
 84      CService service{ConsumeService(fuzzed_data_provider)};
 85      CNode node{ConsumeNode(fuzzed_data_provider)};
 86      {
 87          LOCK(g_maplocalhost_mutex);
 88          mapLocalHost.clear();
 89      }
 90      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
 91          CallOneOf(
 92              fuzzed_data_provider,
 93              [&] {
 94                  service = ConsumeService(fuzzed_data_provider);
 95              },
 96              [&] {
 97                  const bool added{AddLocal(service, fuzzed_data_provider.ConsumeIntegralInRange<int>(0, LOCAL_MAX - 1))};
 98                  if (!added) return;
 99                  assert(service.IsRoutable());
100                  assert(IsLocal(service));
101                  assert(SeenLocal(service));
102              },
103              [&] {
104                  (void)RemoveLocal(service);
105              },
106              [&] {
107                  (void)SeenLocal(service);
108              },
109              [&] {
110                  (void)IsLocal(service);
111              },
112              [&] {
113                  (void)GetLocalAddress(node);
114              });
115      }
116  }