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bitcoin/src/test/fuzz/connman.cpp

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// 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 <addrman.h>
#include <chainparams.h>
#include <common/args.h>
#include <net.h>
#include <net_processing.h>
#include <netaddress.h>
#include <protocol.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <test/fuzz/util/net.h>
#include <test/fuzz/util/threadinterrupt.h>
#include <test/util/setup_common.h>
#include <util/translation.h>
#include <cstdint>
#include <vector>
namespace {
const TestingSetup* g_setup;
int32_t GetCheckRatio()
{
return std::clamp<int32_t>(g_setup->m_node.args->GetIntArg("-checkaddrman", 0), 0, 1000000);
}
} // namespace
void initialize_connman()
{
static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>();
g_setup = testing_setup.get();
}
FUZZ_TARGET(connman, .init = initialize_connman)
{
SeedRandomStateForTest(SeedRand::ZEROS);
FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
SetMockTime(ConsumeTime(fuzzed_data_provider));
auto netgroupman{ConsumeNetGroupManager(fuzzed_data_provider)};
auto addr_man_ptr{std::make_unique<AddrManDeterministic>(netgroupman, fuzzed_data_provider, GetCheckRatio())};
if (fuzzed_data_provider.ConsumeBool()) {
const std::vector<uint8_t> serialized_data{ConsumeRandomLengthByteVector(fuzzed_data_provider)};
DataStream ds{serialized_data};
try {
ds >> *addr_man_ptr;
} catch (const std::ios_base::failure&) {
addr_man_ptr = std::make_unique<AddrManDeterministic>(netgroupman, fuzzed_data_provider, GetCheckRatio());
}
}
AddrManDeterministic& addr_man{*addr_man_ptr};
auto net_events{ConsumeNetEvents(fuzzed_data_provider)};
// Mock CreateSock() to create FuzzedSock.
auto CreateSockOrig = CreateSock;
CreateSock = [&fuzzed_data_provider](int, int, int) {
return std::make_unique<FuzzedSock>(fuzzed_data_provider);
};
// Mock g_dns_lookup() to return a fuzzed address.
auto g_dns_lookup_orig = g_dns_lookup;
g_dns_lookup = [&fuzzed_data_provider](const std::string&, bool) {
return std::vector<CNetAddr>{ConsumeNetAddr(fuzzed_data_provider)};
};
ConnmanTestMsg connman{fuzzed_data_provider.ConsumeIntegral<uint64_t>(),
fuzzed_data_provider.ConsumeIntegral<uint64_t>(),
addr_man,
netgroupman,
Params(),
fuzzed_data_provider.ConsumeBool(),
ConsumeThreadInterrupt(fuzzed_data_provider)};
const uint64_t max_outbound_limit{fuzzed_data_provider.ConsumeIntegral<uint64_t>()};
CConnman::Options options;
options.m_msgproc = &net_events;
options.nMaxOutboundLimit = max_outbound_limit;
connman.Init(options);
CNetAddr random_netaddr;
CAddress random_address;
CNode random_node = ConsumeNode(fuzzed_data_provider);
CSubNet random_subnet;
std::string random_string;
LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 100) {
CNode& p2p_node{*ConsumeNodeAsUniquePtr(fuzzed_data_provider).release()};
connman.AddTestNode(p2p_node);
}
LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
CallOneOf(
fuzzed_data_provider,
[&] {
random_netaddr = ConsumeNetAddr(fuzzed_data_provider);
},
[&] {
random_address = ConsumeAddress(fuzzed_data_provider);
},
[&] {
random_subnet = ConsumeSubNet(fuzzed_data_provider);
},
[&] {
random_string = fuzzed_data_provider.ConsumeRandomLengthString(64);
},
[&] {
connman.AddNode({random_string, fuzzed_data_provider.ConsumeBool()});
},
[&] {
connman.CheckIncomingNonce(fuzzed_data_provider.ConsumeIntegral<uint64_t>());
},
[&] {
connman.DisconnectNode(fuzzed_data_provider.ConsumeIntegral<NodeId>());
},
[&] {
connman.DisconnectNode(random_netaddr);
},
[&] {
connman.DisconnectNode(random_string);
},
[&] {
connman.DisconnectNode(random_subnet);
},
[&] {
connman.ForEachNode([](auto) {});
},
[&] {
(void)connman.ForNode(fuzzed_data_provider.ConsumeIntegral<NodeId>(), [&](auto) { return fuzzed_data_provider.ConsumeBool(); });
},
[&] {
auto max_addresses = fuzzed_data_provider.ConsumeIntegral<size_t>();
auto max_pct = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 100);
auto filtered = fuzzed_data_provider.ConsumeBool();
(void)connman.GetAddressesUnsafe(max_addresses, max_pct, /*network=*/std::nullopt, filtered);
},
[&] {
auto max_addresses = fuzzed_data_provider.ConsumeIntegral<size_t>();
auto max_pct = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 100);
(void)connman.GetAddresses(/*requestor=*/random_node, max_addresses, max_pct);
},
[&] {
(void)connman.GetDeterministicRandomizer(fuzzed_data_provider.ConsumeIntegral<uint64_t>());
},
[&] {
(void)connman.GetNodeCount(fuzzed_data_provider.PickValueInArray({ConnectionDirection::None, ConnectionDirection::In, ConnectionDirection::Out, ConnectionDirection::Both}));
},
[&] {
(void)connman.OutboundTargetReached(fuzzed_data_provider.ConsumeBool());
},
[&] {
CSerializedNetMsg serialized_net_msg;
serialized_net_msg.m_type = fuzzed_data_provider.ConsumeRandomLengthString(CMessageHeader::MESSAGE_TYPE_SIZE);
serialized_net_msg.data = ConsumeRandomLengthByteVector(fuzzed_data_provider);
connman.PushMessage(&random_node, std::move(serialized_net_msg));
},
[&] {
connman.RemoveAddedNode(random_string);
},
[&] {
connman.SetNetworkActive(fuzzed_data_provider.ConsumeBool());
},
[&] {
connman.SetTryNewOutboundPeer(fuzzed_data_provider.ConsumeBool());
},
[&] {
ConnectionType conn_type{
fuzzed_data_provider.PickValueInArray(ALL_CONNECTION_TYPES)};
if (conn_type == ConnectionType::INBOUND) { // INBOUND is not allowed
conn_type = ConnectionType::OUTBOUND_FULL_RELAY;
}
connman.OpenNetworkConnection(
/*addrConnect=*/random_address,
/*fCountFailure=*/fuzzed_data_provider.ConsumeBool(),
/*grant_outbound=*/{},
/*pszDest=*/fuzzed_data_provider.ConsumeBool() ? nullptr : random_string.c_str(),
/*conn_type=*/conn_type,
/*use_v2transport=*/fuzzed_data_provider.ConsumeBool());
},
[&] {
connman.SetNetworkActive(fuzzed_data_provider.ConsumeBool());
const auto peer = ConsumeAddress(fuzzed_data_provider);
connman.CreateNodeFromAcceptedSocketPublic(
/*sock=*/CreateSock(AF_INET, SOCK_STREAM, IPPROTO_TCP),
/*permissions=*/ConsumeWeakEnum(fuzzed_data_provider, ALL_NET_PERMISSION_FLAGS),
/*addr_bind=*/ConsumeAddress(fuzzed_data_provider),
/*addr_peer=*/peer);
},
[&] {
CConnman::Options options;
options.vBinds = ConsumeServiceVector(fuzzed_data_provider);
options.vWhiteBinds = std::vector<NetWhitebindPermissions>{
fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 5)};
for (auto& wb : options.vWhiteBinds) {
wb.m_flags = ConsumeWeakEnum(fuzzed_data_provider, ALL_NET_PERMISSION_FLAGS);
wb.m_service = ConsumeService(fuzzed_data_provider);
}
options.onion_binds = ConsumeServiceVector(fuzzed_data_provider);
options.bind_on_any = options.vBinds.empty() && options.vWhiteBinds.empty() &&
options.onion_binds.empty();
connman.InitBindsPublic(options);
},
[&] {
connman.SocketHandlerPublic();
});
}
(void)connman.GetAddedNodeInfo(fuzzed_data_provider.ConsumeBool());
(void)connman.GetExtraFullOutboundCount();
(void)connman.GetLocalServices();
assert(connman.GetMaxOutboundTarget() == max_outbound_limit);
(void)connman.GetMaxOutboundTimeframe();
(void)connman.GetMaxOutboundTimeLeftInCycle();
(void)connman.GetNetworkActive();
std::vector<CNodeStats> stats;
connman.GetNodeStats(stats);
(void)connman.GetOutboundTargetBytesLeft();
(void)connman.GetTotalBytesRecv();
(void)connman.GetTotalBytesSent();
(void)connman.GetTryNewOutboundPeer();
(void)connman.GetUseAddrmanOutgoing();
(void)connman.ASMapHealthCheck();
connman.ClearTestNodes();
g_dns_lookup = g_dns_lookup_orig;
CreateSock = CreateSockOrig;
}
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