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diff --git a/src/test/fuzz/CMakeLists.txt b/src/test/fuzz/CMakeLists.txt
--- a/src/test/fuzz/CMakeLists.txt
+++ b/src/test/fuzz/CMakeLists.txt
@@ -87,6 +87,7 @@
hex
integer
net_permissions
+ p2p_transport_deserializer
parse_hd_keypath
parse_iso8601
parse_numbers
diff --git a/src/test/fuzz/p2p_transport_deserializer.cpp b/src/test/fuzz/p2p_transport_deserializer.cpp
new file mode 100644
--- /dev/null
+++ b/src/test/fuzz/p2p_transport_deserializer.cpp
@@ -0,0 +1,50 @@
+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <chainparams.h>
+#include <config.h>
+#include <net.h>
+#include <protocol.h>
+
+#include <test/fuzz/fuzz.h>
+
+#include <cassert>
+#include <cstdint>
+#include <limits>
+#include <vector>
+
+void initialize() {
+ SelectParams(CBaseChainParams::REGTEST);
+}
+
+void test_one_input(const std::vector<uint8_t> &buffer) {
+ const Config &config = GetConfig();
+ V1TransportDeserializer deserializer{config.GetChainParams().NetMagic(),
+ SER_NETWORK, INIT_PROTO_VERSION};
+ const char *pch = (const char *)buffer.data();
+ size_t n_bytes = buffer.size();
+ while (n_bytes > 0) {
+ const int handled = deserializer.Read(config, pch, n_bytes);
+ if (handled < 0) {
+ break;
+ }
+ pch += handled;
+ n_bytes -= handled;
+ if (deserializer.Complete()) {
+ const int64_t m_time = std::numeric_limits<int64_t>::max();
+ const CNetMessage msg = deserializer.GetMessage(config, m_time);
+ assert(msg.m_command.size() <= CMessageHeader::COMMAND_SIZE);
+ assert(msg.m_raw_message_size <= buffer.size());
+ assert(msg.m_raw_message_size ==
+ CMessageHeader::HEADER_SIZE + msg.m_message_size);
+ assert(msg.m_time == m_time);
+ if (msg.m_valid_header) {
+ assert(msg.m_valid_netmagic);
+ }
+ if (!msg.m_valid_netmagic) {
+ assert(!msg.m_valid_header);
+ }
+ }
+ }
+}

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