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merge bitcoin#23053: Use public methods in addrman fuzz tests

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Kittywhiskers Van Gogh 2021-09-21 09:35:40 +01:00
parent b6ec8ab6df
commit 3910c68028
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1 changed files with 75 additions and 80 deletions
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81
src/test/fuzz/addrman.cpp
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@ -7,6 +7,7 @@
#include <addrman_impl.h>
#include <chainparams.h>
#include <merkleblock.h>
#include <random.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
@ -35,26 +36,14 @@ FUZZ_TARGET_INIT(data_stream_addr_man, initialize_addrman)
}
}
class AddrManDeterministic : public AddrMan
{
public:
FuzzedDataProvider& m_fuzzed_data_provider;
explicit AddrManDeterministic(std::vector<bool> asmap, FuzzedDataProvider& fuzzed_data_provider)
: AddrMan(std::move(asmap), /* deterministic */ true, /* consistency_check_ratio */ 0)
, m_fuzzed_data_provider(fuzzed_data_provider)
{
WITH_LOCK(m_impl->cs, m_impl->insecure_rand = FastRandomContext{ConsumeUInt256(fuzzed_data_provider)});
}
/**
/**
* Generate a random address. Always returns a valid address.
*/
CNetAddr RandAddr() EXCLUSIVE_LOCKS_REQUIRED(m_impl->cs)
{
CNetAddr RandAddr(FuzzedDataProvider& fuzzed_data_provider, FastRandomContext& fast_random_context)
{
CNetAddr addr;
if (m_fuzzed_data_provider.remaining_bytes() > 1 && m_fuzzed_data_provider.ConsumeBool()) {
addr = ConsumeNetAddr(m_fuzzed_data_provider);
if (fuzzed_data_provider.remaining_bytes() > 1 && fuzzed_data_provider.ConsumeBool()) {
addr = ConsumeNetAddr(fuzzed_data_provider);
} else {
// The networks [1..6] correspond to CNetAddr::BIP155Network (private).
static const std::map<uint8_t, uint8_t> net_len_map = {{1, ADDR_IPV4_SIZE},
@ -62,7 +51,7 @@ public:
{4, ADDR_TORV3_SIZE},
{5, ADDR_I2P_SIZE},
{6, ADDR_CJDNS_SIZE}};
uint8_t net = m_impl->insecure_rand.randrange(5) + 1; // [1..5]
uint8_t net = fast_random_context.randrange(5) + 1; // [1..5]
if (net == 3) {
net = 6;
}
@ -70,7 +59,7 @@ public:
CDataStream s(SER_NETWORK, PROTOCOL_VERSION | ADDRV2_FORMAT);
s << net;
s << m_impl->insecure_rand.randbytes(net_len_map.at(net));
s << fast_random_context.randbytes(net_len_map.at(net));
s >> addr;
}
@ -83,44 +72,50 @@ public:
}
return addr;
}
/**
* Fill this addrman with lots of addresses from lots of sources.
*/
void Fill()
{
LOCK(m_impl->cs);
// Add some of the addresses directly to the "tried" table.
}
/** Fill addrman with lots of addresses from lots of sources. */
void FillAddrman(AddrMan& addrman, FuzzedDataProvider& fuzzed_data_provider)
{
// Add a fraction of the addresses to the "tried" table.
// 0, 1, 2, 3 corresponding to 0%, 100%, 50%, 33%
const size_t n = m_fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 3);
const size_t n = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 3);
const size_t num_sources = m_fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, 50);
const size_t num_sources = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, 50);
CNetAddr prev_source;
// Use insecure_rand inside the loops instead of m_fuzzed_data_provider because when
// the latter is exhausted it just returns 0.
// Generate a FastRandomContext seed to use inside the loops instead of
// fuzzed_data_provider. When fuzzed_data_provider is exhausted it
// just returns 0.
FastRandomContext fast_random_context{ConsumeUInt256(fuzzed_data_provider)};
for (size_t i = 0; i < num_sources; ++i) {
const auto source = RandAddr();
const size_t num_addresses = m_impl->insecure_rand.randrange(500) + 1; // [1..500]
const auto source = RandAddr(fuzzed_data_provider, fast_random_context);
const size_t num_addresses = fast_random_context.randrange(500) + 1; // [1..500]
for (size_t j = 0; j < num_addresses; ++j) {
const auto addr = CAddress{CService{RandAddr(), 8333}, NODE_NETWORK};
const auto time_penalty = m_impl->insecure_rand.randrange(100000001);
m_impl->Add_(addr, source, time_penalty);
const auto addr = CAddress{CService{RandAddr(fuzzed_data_provider, fast_random_context), 8333}, NODE_NETWORK};
const auto time_penalty = fast_random_context.randrange(100000001);
addrman.Add({addr}, source, time_penalty);
if (n > 0 && m_impl->mapInfo.size() % n == 0) {
m_impl->Good_(addr, false, GetTime());
if (n > 0 && addrman.size() % n == 0) {
addrman.Good(addr, GetTime());
}
// Add 10% of the addresses from more than one source.
if (m_impl->insecure_rand.randrange(10) == 0 && prev_source.IsValid()) {
m_impl->Add_({addr}, prev_source, time_penalty);
if (fast_random_context.randrange(10) == 0 && prev_source.IsValid()) {
addrman.Add({addr}, prev_source, time_penalty);
}
}
prev_source = source;
}
}
class AddrManDeterministic : public AddrMan
{
public:
explicit AddrManDeterministic(std::vector<bool> asmap, FuzzedDataProvider& fuzzed_data_provider)
: AddrMan(std::move(asmap), /* deterministic */ true, /* consistency_check_ratio */ 0)
{
WITH_LOCK(m_impl->cs, m_impl->insecure_rand = FastRandomContext{ConsumeUInt256(fuzzed_data_provider)});
}
/**
@ -310,7 +305,7 @@ FUZZ_TARGET_INIT(addrman_serdeser, initialize_addrman)
CDataStream data_stream(SER_NETWORK, PROTOCOL_VERSION);
addr_man1.Fill();
FillAddrman(addr_man1, fuzzed_data_provider);
data_stream << addr_man1;
data_stream >> addr_man2;
assert(addr_man1 == addr_man2);