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// Copyright (c) 2020-2021 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 <banman.h>
#include <fs.h>
#include <netaddress.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <test/util/setup_common.h>
#include <util/system.h>
#include <cstdint>
#include <limits>
#include <string>
#include <vector>
namespace {
int64_t ConsumeBanTimeOffset(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
// Avoid signed integer overflow by capping to int32_t max:
// banman.cpp:137:73: runtime error: signed integer overflow: 1591700817 + 9223372036854775807 cannot be represented in type 'long'
return fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(std::numeric_limits<int64_t>::min(), std::numeric_limits<int32_t>::max());
}
} // namespace
void initialize_banman()
{
static const auto testing_setup = MakeNoLogFileContext<>();
}
FUZZ_TARGET_INIT(banman, initialize_banman)
{
// The complexity is O(N^2), where N is the input size, because each call
// might call DumpBanlist (or other methods that are at least linear
// complexity of the input size).
int limit_max_ops{300};
FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
SetMockTime(ConsumeTime(fuzzed_data_provider));
const fs::path banlist_file = gArgs.GetDataDirNet() / "fuzzed_banlist.dat";
fs::remove(banlist_file);
{
BanMan ban_man{banlist_file, nullptr, ConsumeBanTimeOffset(fuzzed_data_provider)};
while (--limit_max_ops >= 0 && fuzzed_data_provider.ConsumeBool()) {
CallOneOf(
fuzzed_data_provider,
[&] {
ban_man.Ban(ConsumeNetAddr(fuzzed_data_provider),
ConsumeBanTimeOffset(fuzzed_data_provider), fuzzed_data_provider.ConsumeBool());
},
[&] {
ban_man.Ban(ConsumeSubNet(fuzzed_data_provider),
ConsumeBanTimeOffset(fuzzed_data_provider), fuzzed_data_provider.ConsumeBool());
},
[&] {
ban_man.ClearBanned();
},
[&] {
ban_man.IsBanned(ConsumeNetAddr(fuzzed_data_provider));
},
[&] {
ban_man.IsBanned(ConsumeSubNet(fuzzed_data_provider));
},
[&] {
ban_man.Unban(ConsumeNetAddr(fuzzed_data_provider));
},
[&] {
ban_man.Unban(ConsumeSubNet(fuzzed_data_provider));
},
[&] {
banmap_t banmap;
ban_man.GetBanned(banmap);
},
[&] {
ban_man.DumpBanlist();
},
[&] {
ban_man.Discourage(ConsumeNetAddr(fuzzed_data_provider));
});
}
}
fs::remove(banlist_file);
}
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