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 <test/util/time.h>
 18  #include <util/asmap.h>
 19  #include <util/chaintype.h>
 20  #include <util/time.h>
 21  
 22  #include <cstdint>
 23  #include <optional>
 24  #include <string>
 25  #include <vector>
 26  
 27  void initialize_net()
 28  {
 29      static const auto testing_setup = MakeNoLogFileContext<>(ChainType::MAIN);
 30  }
 31  
 32  FUZZ_TARGET(net, .init = initialize_net)
 33  {
 34      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
 35      NodeClockContext clock_ctx{ConsumeTime(fuzzed_data_provider)};
 36      CNode node{ConsumeNode(fuzzed_data_provider)};
 37      node.SetCommonVersion(fuzzed_data_provider.ConsumeIntegral<int>());
 38      if (const auto service_opt =
 39              ConsumeDeserializable<CService>(fuzzed_data_provider, ConsumeDeserializationParams<CNetAddr::SerParams>(fuzzed_data_provider)))
 40      {
 41          node.SetAddrLocal(*service_opt);
 42      }
 43      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
 44          CallOneOf(
 45              fuzzed_data_provider,
 46              [&] {
 47                  node.CloseSocketDisconnect();
 48              },
 49              [&] {
 50                  CNodeStats stats;
 51                  node.CopyStats(stats);
 52              },
 53              [&] {
 54                  const CNode* add_ref_node = node.AddRef();
 55                  assert(add_ref_node == &node);
 56              },
 57              [&] {
 58                  if (node.GetRefCount() > 0) {
 59                      node.Release();
 60                  }
 61              },
 62              [&] {
 63                  const std::vector<uint8_t> b = ConsumeRandomLengthByteVector(fuzzed_data_provider);
 64                  bool complete;
 65                  node.ReceiveMsgBytes(b, complete);
 66              });
 67      }
 68  
 69      (void)node.GetAddrLocal();
 70      (void)node.GetId();
 71      (void)node.GetLocalNonce();
 72      const int ref_count = node.GetRefCount();
 73      assert(ref_count >= 0);
 74      (void)node.GetCommonVersion();
 75  
 76      const NetPermissionFlags net_permission_flags = ConsumeWeakEnum(fuzzed_data_provider, ALL_NET_PERMISSION_FLAGS);
 77      (void)node.HasPermission(net_permission_flags);
 78      (void)node.ConnectedThroughNetwork();
 79  }
 80  
 81  FUZZ_TARGET(local_address, .init = initialize_net)
 82  {
 83      FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
 84      NodeClockContext clock_ctx{ConsumeTime(fuzzed_data_provider)};
 85      CService service{ConsumeService(fuzzed_data_provider)};
 86      CNode node{ConsumeNode(fuzzed_data_provider)};
 87      {
 88          LOCK(g_maplocalhost_mutex);
 89          mapLocalHost.clear();
 90      }
 91      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
 92          CallOneOf(
 93              fuzzed_data_provider,
 94              [&] {
 95                  service = ConsumeService(fuzzed_data_provider);
 96              },
 97              [&] {
 98                  const bool added{AddLocal(service, fuzzed_data_provider.ConsumeIntegralInRange<int>(0, LOCAL_MAX - 1))};
 99                  if (!added) return;
100                  assert(service.IsRoutable());
101                  assert(IsLocal(service));
102                  assert(SeenLocal(service));
103              },
104              [&] {
105                  (void)RemoveLocal(service);
106              },
107              [&] {
108                  (void)SeenLocal(service);
109              },
110              [&] {
111                  (void)IsLocal(service);
112              },
113              [&] {
114                  (void)GetLocalAddress(node);
115              });
116      }
117  }