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// Copyright (c) 2020-present 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 <addrman.h>
#include <consensus/consensus.h>
#include <net.h>
#include <net_processing.h>
#include <node/warnings.h>
#include <protocol.h>
#include <script/script.h>
#include <sync.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <test/fuzz/util/net.h>
#include <test/util/mining.h>
#include <test/util/net.h>
#include <test/util/setup_common.h>
#include <test/util/validation.h>
#include <util/time.h>
#include <validationinterface.h>
#include <ios>
#include <string>
#include <utility>
#include <vector>
namespace {
const TestingSetup* g_setup;
void initialize()
{
static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>(
/*chain_type=*/ChainType::REGTEST);
g_setup = testing_setup.get();
}
} // namespace
FUZZ_TARGET(p2p_handshake, .init = ::initialize)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
ConnmanTestMsg& connman = static_cast<ConnmanTestMsg&>(*g_setup->m_node.connman);
auto& chainman = static_cast<TestChainstateManager&>(*g_setup->m_node.chainman);
SetMockTime(1610000000); // any time to successfully reset ibd
chainman.ResetIbd();
node::Warnings warnings{};
NetGroupManager netgroupman{{}};
AddrMan addrman{netgroupman, /*deterministic=*/true, 0};
auto peerman = PeerManager::make(connman, addrman,
/*banman=*/nullptr, chainman,
*g_setup->m_node.mempool, warnings,
PeerManager::Options{
.reconcile_txs = true,
.deterministic_rng = true,
});
connman.SetMsgProc(peerman.get());
LOCK(NetEventsInterface::g_msgproc_mutex);
std::vector<CNode*> peers;
const auto num_peers_to_add = fuzzed_data_provider.ConsumeIntegralInRange(1, 3);
for (int i = 0; i < num_peers_to_add; ++i) {
peers.push_back(ConsumeNodeAsUniquePtr(fuzzed_data_provider, i).release());
connman.AddTestNode(*peers.back());
peerman->InitializeNode(
*peers.back(),
static_cast<ServiceFlags>(fuzzed_data_provider.ConsumeIntegral<uint64_t>()));
}
LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 100)
{
CNode& connection = *PickValue(fuzzed_data_provider, peers);
if (connection.fDisconnect || connection.fSuccessfullyConnected) {
// Skip if the connection was disconnected or if the version
// handshake was already completed.
continue;
}
SetMockTime(GetTime() +
fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(
-std::chrono::seconds{10min}.count(), // Allow mocktime to go backwards slightly
std::chrono::seconds{TIMEOUT_INTERVAL}.count()));
CSerializedNetMsg net_msg;
net_msg.m_type = PickValue(fuzzed_data_provider, ALL_NET_MESSAGE_TYPES);
net_msg.data = ConsumeRandomLengthByteVector(fuzzed_data_provider, MAX_PROTOCOL_MESSAGE_LENGTH);
connman.FlushSendBuffer(connection);
(void)connman.ReceiveMsgFrom(connection, std::move(net_msg));
bool more_work{true};
while (more_work) {
connection.fPauseSend = false;
try {
more_work = connman.ProcessMessagesOnce(connection);
} catch (const std::ios_base::failure&) {
}
peerman->SendMessages(&connection);
}
}
g_setup->m_node.connman->StopNodes();
}
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