Merge #20881: fuzz: net permission flags in net processing

fad327ca65ef30cee2027f1e62d597f0b1c1b641 fuzz: net permission flags in net processing (MarcoFalke)

Pull request description:

  to increase coverage

ACKs for top commit:
  Crypt-iQ:
    cr ACK fad327c
  practicalswift:
    ACK fad327ca65ef30cee2027f1e62d597f0b1c1b641

Tree-SHA512: f8643d1774ff13524ab97ab228ad070489e080435e5742af26e6e325fd002e4c1fd78b9887e11622e79d6fe0c4daaddce5e033e6cd4b32e50fd68b434aab7333

3 files changed, 20 insertions, 5 deletions

diff --git a/src/test/fuzz/process_message.cpp b/src/test/fuzz/process_message.cpp
index b6865c5347..58637662c5 100644
--- a/src/test/fuzz/process_message.cpp
+++ b/src/test/fuzz/process_message.cpp
@@ -65,9 +65,8 @@ void fuzz_target(const std::vector<uint8_t>& buffer, const std::string& LIMIT_TO
     const bool jump_out_of_ibd{fuzzed_data_provider.ConsumeBool()};
     if (jump_out_of_ibd) chainstate.JumpOutOfIbd();
     CNode& p2p_node = *ConsumeNodeAsUniquePtr(fuzzed_data_provider).release();
+    FillNode(fuzzed_data_provider, p2p_node);
     p2p_node.fSuccessfullyConnected = true;
-    p2p_node.nVersion = PROTOCOL_VERSION;
-    p2p_node.SetCommonVersion(PROTOCOL_VERSION);
     connman.AddTestNode(p2p_node);
     g_setup->m_node.peerman->InitializeNode(&p2p_node);
 
diff --git a/src/test/fuzz/process_messages.cpp b/src/test/fuzz/process_messages.cpp
index fcfa623508..db52da2f7e 100644
--- a/src/test/fuzz/process_messages.cpp
+++ b/src/test/fuzz/process_messages.cpp
@@ -49,11 +49,10 @@ FUZZ_TARGET_INIT(process_messages, initialize_process_messages)
     for (int i = 0; i < num_peers_to_add; ++i) {
         peers.push_back(ConsumeNodeAsUniquePtr(fuzzed_data_provider, i).release());
         CNode& p2p_node = *peers.back();
+        FillNode(fuzzed_data_provider, p2p_node);
 
         p2p_node.fSuccessfullyConnected = true;
         p2p_node.fPauseSend = false;
-        p2p_node.nVersion = PROTOCOL_VERSION;
-        p2p_node.SetCommonVersion(PROTOCOL_VERSION);
         g_setup->m_node.peerman->InitializeNode(&p2p_node);
 
         connman.AddTestNode(p2p_node);
diff --git a/src/test/fuzz/util.h b/src/test/fuzz/util.h
index 94c691936e..4e8e501895 100644
--- a/src/test/fuzz/util.h
+++ b/src/test/fuzz/util.h
@@ -296,7 +296,7 @@ inline CAddress ConsumeAddress(FuzzedDataProvider& fuzzed_data_provider) noexcep
 }
 
 template <bool ReturnUniquePtr = false>
-auto ConsumeNode(FuzzedDataProvider& fuzzed_data_provider, const std::optional<NodeId>& node_id_in = nullopt) noexcept
+auto ConsumeNode(FuzzedDataProvider& fuzzed_data_provider, const std::optional<NodeId>& node_id_in = std::nullopt) noexcept
 {
     const NodeId node_id = node_id_in.value_or(fuzzed_data_provider.ConsumeIntegral<NodeId>());
     const ServiceFlags local_services = ConsumeWeakEnum(fuzzed_data_provider, ALL_SERVICE_FLAGS);
@@ -316,6 +316,23 @@ auto ConsumeNode(FuzzedDataProvider& fuzzed_data_provider, const std::optional<N
 }
 inline std::unique_ptr<CNode> ConsumeNodeAsUniquePtr(FuzzedDataProvider& fdp, const std::optional<NodeId>& node_id_in = nullopt) { return ConsumeNode<true>(fdp, node_id_in); }
 
+inline void FillNode(FuzzedDataProvider& fuzzed_data_provider, CNode& node, const std::optional<int32_t>& version_in = std::nullopt) noexcept
+{
+    const ServiceFlags remote_services = ConsumeWeakEnum(fuzzed_data_provider, ALL_SERVICE_FLAGS);
+    const NetPermissionFlags permission_flags = ConsumeWeakEnum(fuzzed_data_provider, ALL_NET_PERMISSION_FLAGS);
+    const int32_t version = version_in.value_or(fuzzed_data_provider.ConsumeIntegral<int32_t>());
+    const bool filter_txs = fuzzed_data_provider.ConsumeBool();
+
+    node.nServices = remote_services;
+    node.m_permissionFlags = permission_flags;
+    node.nVersion = version;
+    node.SetCommonVersion(version);
+    if (node.m_tx_relay != nullptr) {
+        LOCK(node.m_tx_relay->cs_filter);
+        node.m_tx_relay->fRelayTxes = filter_txs;
+    }
+}
+
 inline void InitializeFuzzingContext(const std::string& chain_name = CBaseChainParams::REGTEST)
 {
     static const BasicTestingSetup basic_testing_setup{chain_name, {"-nodebuglogfile"}};