Merge #20188: tests: Add fuzzing harness for CConnman

79ef8324d4c85ed16a304e98805724b8a59022ac tests: Add fuzzing harness for CConnman (practicalswift)

Pull request description:

  Add fuzzing harness for `CConnman`.

  See [`doc/fuzzing.md`](https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md) for information on how to fuzz Bitcoin Core. Don't forget to contribute any coverage increasing inputs you find to the [Bitcoin Core fuzzing corpus repo](https://github.com/bitcoin-core/qa-assets).

  Happy fuzzing :)

ACKs for top commit:
  MarcoFalke:
    review ACK 79ef8324d4c85ed16a304e98805724b8a59022ac

Tree-SHA512: eb9ffae20e939b818f8b9def064544b9a8fcd127ca22d1a54af1afedf1d24143be42419f3a03d684be59a5ff07b29d8bfa34ef2aaf1d9f9f75c4c1aaa90a29a8

1 files changed, 27 insertions, 0 deletions

diff --git a/src/test/fuzz/util.h b/src/test/fuzz/util.h
index ed6093a8a8..fec6e13e86 100644
--- a/src/test/fuzz/util.h
+++ b/src/test/fuzz/util.h
@@ -11,6 +11,7 @@
 #include <chainparamsbase.h>
 #include <coins.h>
 #include <consensus/consensus.h>
+#include <net.h>
 #include <netaddress.h>
 #include <netbase.h>
 #include <primitives/transaction.h>
@@ -260,6 +261,32 @@ CSubNet ConsumeSubNet(FuzzedDataProvider& fuzzed_data_provider) noexcept
     return {ConsumeNetAddr(fuzzed_data_provider), fuzzed_data_provider.ConsumeIntegral<uint8_t>()};
 }
 
+CService ConsumeService(FuzzedDataProvider& fuzzed_data_provider) noexcept
+{
+    return {ConsumeNetAddr(fuzzed_data_provider), fuzzed_data_provider.ConsumeIntegral<uint16_t>()};
+}
+
+CAddress ConsumeAddress(FuzzedDataProvider& fuzzed_data_provider) noexcept
+{
+    return {ConsumeService(fuzzed_data_provider), static_cast<ServiceFlags>(fuzzed_data_provider.ConsumeIntegral<uint64_t>()), fuzzed_data_provider.ConsumeIntegral<uint32_t>()};
+}
+
+CNode ConsumeNode(FuzzedDataProvider& fuzzed_data_provider) noexcept
+{
+    const NodeId node_id = fuzzed_data_provider.ConsumeIntegral<NodeId>();
+    const ServiceFlags local_services = static_cast<ServiceFlags>(fuzzed_data_provider.ConsumeIntegral<uint64_t>());
+    const int my_starting_height = fuzzed_data_provider.ConsumeIntegral<int>();
+    const SOCKET socket = INVALID_SOCKET;
+    const CAddress address = ConsumeAddress(fuzzed_data_provider);
+    const uint64_t keyed_net_group = fuzzed_data_provider.ConsumeIntegral<uint64_t>();
+    const uint64_t local_host_nonce = fuzzed_data_provider.ConsumeIntegral<uint64_t>();
+    const CAddress addr_bind = ConsumeAddress(fuzzed_data_provider);
+    const std::string addr_name = fuzzed_data_provider.ConsumeRandomLengthString(64);
+    const ConnectionType conn_type = fuzzed_data_provider.PickValueInArray({ConnectionType::INBOUND, ConnectionType::OUTBOUND_FULL_RELAY, ConnectionType::MANUAL, ConnectionType::FEELER, ConnectionType::BLOCK_RELAY, ConnectionType::ADDR_FETCH});
+    const bool inbound_onion = fuzzed_data_provider.ConsumeBool();
+    return {node_id, local_services, my_starting_height, socket, address, keyed_net_group, local_host_nonce, addr_bind, addr_name, conn_type, inbound_onion};
+}
+
 void InitializeFuzzingContext(const std::string& chain_name = CBaseChainParams::REGTEST)
 {
     static const BasicTestingSetup basic_testing_setup{chain_name, {"-nodebuglogfile"}};