// Copyright (c) 2020-2022 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 <net.h>

#include <net_permissions.h>

#include <netaddress.h>

#include <protocol.h>

#include <random.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/net.h>

#include <test/util/setup_common.h>

#include <util/asmap.h>

#include <util/chaintype.h>

#include <util/time.h>

#include <cstdint>

#include <optional>

#include <string>

#include <vector>

void initialize_net()

{

    static const auto testing_setup = MakeNoLogFileContext<>(ChainType::MAIN);

}

FUZZ_TARGET(net, .init = initialize_net)

{

    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());

    SetMockTime(ConsumeTime(fuzzed_data_provider));

    CNode node{ConsumeNode(fuzzed_data_provider)};

    node.SetCommonVersion(fuzzed_data_provider.ConsumeIntegral<int>());

    if (const auto service_opt =

            ConsumeDeserializable<CService>(fuzzed_data_provider, ConsumeDeserializationParams<CNetAddr::SerParams>(fuzzed_data_provider)))

    {

        node.SetAddrLocal(*service_opt);

    }

    LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {

        CallOneOf(

            fuzzed_data_provider,

            [&] {

                node.CloseSocketDisconnect();

            },

            [&] {

                CNodeStats stats;

                node.CopyStats(stats);

            },

            [&] {

                const CNode* add_ref_node = node.AddRef();

                assert(add_ref_node == &node);

            },

            [&] {

                if (node.GetRefCount() > 0) {

                    node.Release();

                }

            },

            [&] {

                const std::vector<uint8_t> b = ConsumeRandomLengthByteVector(fuzzed_data_provider);

                bool complete;

                node.ReceiveMsgBytes(b, complete);

            });

    }

    (void)node.GetAddrLocal();

    (void)node.GetId();

    (void)node.GetLocalNonce();

    const int ref_count = node.GetRefCount();

    assert(ref_count >= 0);

    (void)node.GetCommonVersion();

    const NetPermissionFlags net_permission_flags = ConsumeWeakEnum(fuzzed_data_provider, ALL_NET_PERMISSION_FLAGS);

    (void)node.HasPermission(net_permission_flags);

    (void)node.ConnectedThroughNetwork();

}

FUZZ_TARGET(local_address, .init = initialize_net)

{

    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());

    SetMockTime(ConsumeTime(fuzzed_data_provider));

    CService service{ConsumeService(fuzzed_data_provider)};

    CNode node{ConsumeNode(fuzzed_data_provider)};

    {

        LOCK(g_maplocalhost_mutex);

        mapLocalHost.clear();

    }

    LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {

        CallOneOf(

            fuzzed_data_provider,

            [&] {

                service = ConsumeService(fuzzed_data_provider);

            },

            [&] {

                const bool added{AddLocal(service, fuzzed_data_provider.ConsumeIntegralInRange<int>(0, LOCAL_MAX - 1))};

                if (!added) return;

                assert(service.IsRoutable());

                assert(IsLocal(service));

                assert(SeenLocal(service));

            },

            [&] {

                (void)RemoveLocal(service);

            },

            [&] {

                (void)SeenLocal(service);

            },

            [&] {

                (void)IsLocal(service);

            },

            [&] {

                (void)GetLocalAddress(node);

            });

    }

}