node_eviction.cpp raw

   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 <net.h>
   6  #include <protocol.h>
   7  #include <test/fuzz/FuzzedDataProvider.h>
   8  #include <test/fuzz/fuzz.h>
   9  #include <test/fuzz/util.h>
  10  #include <test/fuzz/util/net.h>
  11  
  12  #include <algorithm>
  13  #include <cassert>
  14  #include <cstdint>
  15  #include <optional>
  16  #include <vector>
  17  
  18  FUZZ_TARGET(node_eviction)
  19  {
  20      FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
  21      std::vector<NodeEvictionCandidate> eviction_candidates;
  22      LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000)
  23      {
  24          eviction_candidates.push_back({
  25              /*id=*/fuzzed_data_provider.ConsumeIntegral<NodeId>(),
  26              /*m_connected=*/ConsumeTime(fuzzed_data_provider),
  27              /*m_min_ping_time=*/ConsumeDuration<decltype(NodeEvictionCandidate::m_min_ping_time)>(fuzzed_data_provider, /*min=*/std::chrono::years{-1}, /*max=*/decltype(CNode::m_min_ping_time.load())::max()),
  28              /*m_last_block_time=*/ConsumeTime(fuzzed_data_provider).time_since_epoch(),
  29              /*m_last_tx_time=*/ConsumeTime(fuzzed_data_provider).time_since_epoch(),
  30              /*fRelevantServices=*/fuzzed_data_provider.ConsumeBool(),
  31              /*m_relay_txs=*/fuzzed_data_provider.ConsumeBool(),
  32              /*fBloomFilter=*/fuzzed_data_provider.ConsumeBool(),
  33              /*nKeyedNetGroup=*/fuzzed_data_provider.ConsumeIntegral<uint64_t>(),
  34              /*prefer_evict=*/fuzzed_data_provider.ConsumeBool(),
  35              /*m_is_local=*/fuzzed_data_provider.ConsumeBool(),
  36              /*m_network=*/fuzzed_data_provider.PickValueInArray(ALL_NETWORKS),
  37              /*m_noban=*/fuzzed_data_provider.ConsumeBool(),
  38              /*m_conn_type=*/fuzzed_data_provider.PickValueInArray(ALL_CONNECTION_TYPES),
  39          });
  40      }
  41      // Make a copy since eviction_candidates may be in some valid but otherwise
  42      // indeterminate state after the SelectNodeToEvict(&&) call.
  43      const std::vector<NodeEvictionCandidate> eviction_candidates_copy = eviction_candidates;
  44      const std::optional<NodeId> node_to_evict = SelectNodeToEvict(std::move(eviction_candidates));
  45      if (node_to_evict) {
  46          assert(std::any_of(eviction_candidates_copy.begin(), eviction_candidates_copy.end(), [&node_to_evict](const NodeEvictionCandidate& eviction_candidate) { return *node_to_evict == eviction_candidate.id; }));
  47      }
  48  }
  49