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Add randomized delay when forwarding txes from i2p/tor -> ipv4/6

This commit is contained in:
Lee Clagett 2019-11-17 17:54:37 +00:00
parent 378cdeaeae
commit 67ade80055
9 changed files with 368 additions and 40 deletions
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35
src/blockchain_db/blockchain_db.cpp
View File

@ -63,6 +63,7 @@ bool matches_category(relay_method method, relay_category category) noexcept
{
default:
case relay_method::local:
case relay_method::forward:
case relay_method::stem:
return false;
case relay_method::block:
@ -79,6 +80,7 @@ void txpool_tx_meta_t::set_relay_method(relay_method method) noexcept
kept_by_block = 0;
do_not_relay = 0;
is_local = 0;
is_forwarding = 0;
dandelionpp_stem = 0;
switch (method)
@ -89,8 +91,8 @@ void txpool_tx_meta_t::set_relay_method(relay_method method) noexcept
case relay_method::local:
is_local = 1;
break;
default:
case relay_method::fluff:
case relay_method::forward:
is_forwarding = 1;
break;
case relay_method::stem:
dandelionpp_stem = 1;
@ -98,26 +100,45 @@ void txpool_tx_meta_t::set_relay_method(relay_method method) noexcept
case relay_method::block:
kept_by_block = 1;
break;
default:
case relay_method::fluff:
break;
}
}
relay_method txpool_tx_meta_t::get_relay_method() const noexcept
{
if (kept_by_block)
const uint8_t state =
uint8_t(kept_by_block) +
(uint8_t(do_not_relay) << 1) +
(uint8_t(is_local) << 2) +
(uint8_t(is_forwarding) << 3) +
(uint8_t(dandelionpp_stem) << 4);
switch (state)
{
default: // error case
case 0:
break;
case 1:
return relay_method::block;
if (do_not_relay)
case 2:
return relay_method::none;
if (is_local)
case 4:
return relay_method::local;
if (dandelionpp_stem)
case 8:
return relay_method::forward;
case 16:
return relay_method::stem;
};
return relay_method::fluff;
}
bool txpool_tx_meta_t::upgrade_relay_method(relay_method method) noexcept
{
static_assert(relay_method::none < relay_method::local, "bad relay_method value");
static_assert(relay_method::local < relay_method::stem, "bad relay_method value");
static_assert(relay_method::local < relay_method::forward, "bad relay_method value");
static_assert(relay_method::forward < relay_method::stem, "bad relay_method value");
static_assert(relay_method::stem < relay_method::fluff, "bad relay_method value");
static_assert(relay_method::fluff < relay_method::block, "bad relay_method value");

5
src/blockchain_db/blockchain_db.h
View File

@ -160,7 +160,7 @@ struct txpool_tx_meta_t
uint64_t max_used_block_height;
uint64_t last_failed_height;
uint64_t receive_time;
uint64_t last_relayed_time; //!< If Dandelion++ stem, randomized embargo timestamp. Otherwise, last relayed timestmap.
uint64_t last_relayed_time; //!< If received over i2p/tor, randomized forward time. If Dandelion++stem, randomized embargo time. Otherwise, last relayed timestamp
// 112 bytes
uint8_t kept_by_block;
uint8_t relayed;
@ -169,7 +169,8 @@ struct txpool_tx_meta_t
uint8_t pruned: 1;
uint8_t is_local: 1;
uint8_t dandelionpp_stem : 1;
uint8_t bf_padding: 4;
uint8_t is_forwarding: 1;
uint8_t bf_padding: 3;
uint8_t padding[76]; // till 192 bytes

5
src/cryptonote_config.h
View File

@ -117,6 +117,11 @@
#define CRYPTONOTE_NOISE_BYTES 3*1024 // 3 KiB
#define CRYPTONOTE_NOISE_CHANNELS 2 // Max outgoing connections per zone used for noise/covert sending
// Both below are in seconds. The idea is to delay forwarding from i2p/tor
// to ipv4/6, such that 2+ incoming connections _could_ have sent the tx
#define CRYPTONOTE_FORWARD_DELAY_BASE (CRYPTONOTE_NOISE_MIN_DELAY + CRYPTONOTE_NOISE_DELAY_RANGE)
#define CRYPTONOTE_FORWARD_DELAY_AVERAGE (CRYPTONOTE_FORWARD_DELAY_BASE + (CRYPTONOTE_FORWARD_DELAY_BASE / 2))
#define CRYPTONOTE_MAX_FRAGMENTS 20 // ~20 * NOISE_BYTES max payload size for covert/noise send
#define COMMAND_RPC_GET_BLOCKS_FAST_MAX_COUNT 1000

6
src/cryptonote_core/cryptonote_core.cpp
View File

@ -1272,6 +1272,7 @@ namespace cryptonote
{
NOTIFY_NEW_TRANSACTIONS::request public_req{};
NOTIFY_NEW_TRANSACTIONS::request private_req{};
NOTIFY_NEW_TRANSACTIONS::request stem_req{};
for (auto& tx : txs)
{
switch (std::get<2>(tx))
@ -1282,6 +1283,9 @@ namespace cryptonote
case relay_method::local:
private_req.txs.push_back(std::move(std::get<1>(tx)));
break;
case relay_method::forward:
stem_req.txs.push_back(std::move(std::get<1>(tx)));
break;
case relay_method::block:
case relay_method::fluff:
case relay_method::stem:
@ -1299,6 +1303,8 @@ namespace cryptonote
get_protocol()->relay_transactions(public_req, source, epee::net_utils::zone::public_, relay_method::fluff);
if (!private_req.txs.empty())
get_protocol()->relay_transactions(private_req, source, epee::net_utils::zone::invalid, relay_method::local);
if (!stem_req.txs.empty())
get_protocol()->relay_transactions(stem_req, source, epee::net_utils::zone::public_, relay_method::stem);
}
return true;
}

56
src/cryptonote_core/tx_pool.cpp
View File

@ -91,6 +91,8 @@ namespace cryptonote
time_t const MAX_RELAY_TIME = (60 * 60 * 4); // at most that many seconds between resends
float const ACCEPT_THRESHOLD = 1.0f;
constexpr const std::chrono::seconds forward_delay_average{CRYPTONOTE_FORWARD_DELAY_AVERAGE};
// a kind of increasing backoff within min/max bounds
uint64_t get_relay_delay(time_t now, time_t received)
{
@ -309,8 +311,14 @@ namespace cryptonote
if (meta.upgrade_relay_method(tx_relay) || !existing_tx) // synchronize with embargo timer or stem/fluff out-of-order messages
{
using clock = std::chrono::system_clock;
auto last_relayed_time = std::numeric_limits<decltype(meta.last_relayed_time)>::max();
if (tx_relay == relay_method::forward)
last_relayed_time = clock::to_time_t(clock::now() + crypto::random_poisson_seconds{forward_delay_average}());
// else the `set_relayed` function will adjust the time accordingly later
//update transactions container
meta.last_relayed_time = std::numeric_limits<decltype(meta.last_relayed_time)>::max();
meta.last_relayed_time = last_relayed_time;
meta.receive_time = receive_time;
meta.weight = tx_weight;
meta.fee = fee;
@ -341,7 +349,7 @@ namespace cryptonote
tvc.m_added_to_pool = true;
static_assert(unsigned(relay_method::none) == 0, "expected relay_method::none value to be zero");
if(meta.fee > 0)
if(meta.fee > 0 && tx_relay != relay_method::forward)
tvc.m_relay = tx_relay;
}
@ -722,28 +730,46 @@ namespace cryptonote
//TODO: investigate whether boolean return is appropriate
bool tx_memory_pool::get_relayable_transactions(std::vector<std::tuple<crypto::hash, cryptonote::blobdata, relay_method>> &txs) const
{
std::vector<std::pair<crypto::hash, txpool_tx_meta_t>> change_timestamps;
const uint64_t now = time(NULL);
CRITICAL_REGION_LOCAL(m_transactions_lock);
CRITICAL_REGION_LOCAL1(m_blockchain);
const uint64_t now = time(NULL);
LockedTXN lock(m_blockchain.get_db());
txs.reserve(m_blockchain.get_txpool_tx_count());
m_blockchain.for_all_txpool_txes([this, now, &txs](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *){
m_blockchain.for_all_txpool_txes([this, now, &txs, &change_timestamps](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata *){
// 0 fee transactions are never relayed
if(!meta.pruned && meta.fee > 0 && !meta.do_not_relay)
{
if (!meta.dandelionpp_stem && now - meta.last_relayed_time <= get_relay_delay(now, meta.receive_time))
return true;
if (meta.dandelionpp_stem && meta.last_relayed_time < now) // for dandelion++ stem, this value is the embargo timeout
const relay_method tx_relay = meta.get_relay_method();
switch (tx_relay)
{
case relay_method::stem:
case relay_method::forward:
if (meta.last_relayed_time > now)
return true; // continue to next tx
change_timestamps.emplace_back(txid, meta);
break;
default:
case relay_method::none:
return true;
case relay_method::local:
case relay_method::fluff:
case relay_method::block:
if (now - meta.last_relayed_time <= get_relay_delay(now, meta.receive_time))
return true; // continue to next tx
break;
}
// if the tx is older than half the max lifetime, we don't re-relay it, to avoid a problem
// mentioned by smooth where nodes would flush txes at slightly different times, causing
// flushed txes to be re-added when received from a node which was just about to flush it
uint64_t max_age = meta.kept_by_block ? CRYPTONOTE_MEMPOOL_TX_FROM_ALT_BLOCK_LIVETIME : CRYPTONOTE_MEMPOOL_TX_LIVETIME;
uint64_t max_age = (tx_relay == relay_method::block) ? CRYPTONOTE_MEMPOOL_TX_FROM_ALT_BLOCK_LIVETIME : CRYPTONOTE_MEMPOOL_TX_LIVETIME;
if (now - meta.receive_time <= max_age / 2)
{
try
{
txs.emplace_back(txid, m_blockchain.get_txpool_tx_blob(txid, relay_category::all), meta.get_relay_method());
txs.emplace_back(txid, m_blockchain.get_txpool_tx_blob(txid, relay_category::all), tx_relay);
}
catch (const std::exception &e)
{
@ -754,6 +780,18 @@ namespace cryptonote
}
return true;
}, false, relay_category::relayable);
for (auto& elem : change_timestamps)
{
/* These transactions are still in forward or stem state, so the field
represents the next time a relay should be attempted. Will be
overwritten when the state is upgraded to stem, fluff or block. This
function is only called every ~2 minutes, so this resetting should be
unnecessary, but is primarily a precaution against potential changes
to the callback routines. */
elem.second.last_relayed_time = now + get_relay_delay(now, elem.second.receive_time);
m_blockchain.update_txpool_tx(elem.first, elem.second);
}
return true;
}
//---------------------------------------------------------------------------------

18
src/cryptonote_protocol/cryptonote_protocol_handler.inl
View File

@ -927,7 +927,19 @@ namespace cryptonote
return 1;
}
relay_method tx_relay;
/* If the txes were received over i2p/tor, the default is to "forward"
with a randomized delay to further enhance the "white noise" behavior,
potentially making it harder for ISP-level spies to determine which
inbound link sent the tx. If the sender disabled "white noise" over
i2p/tor, then the sender is "fluffing" (to only outbound) i2p/tor
connections with the `dandelionpp_fluff` flag set. The receiver (hidden
service) will immediately fluff in that scenario (i.e. this assumes that a
sybil spy will be unable to link an IP to an i2p/tor connection). */
const epee::net_utils::zone zone = context.m_remote_address.get_zone();
relay_method tx_relay = zone == epee::net_utils::zone::public_ ?
relay_method::stem : relay_method::forward;
std::vector<blobdata> stem_txs{};
std::vector<blobdata> fluff_txs{};
if (arg.dandelionpp_fluff)
@ -936,10 +948,7 @@ namespace cryptonote
fluff_txs.reserve(arg.txs.size());
}
else
{
tx_relay = relay_method::stem;
stem_txs.reserve(arg.txs.size());
}
for (auto& tx : arg.txs)
{
@ -962,6 +971,7 @@ namespace cryptonote
fluff_txs.push_back(std::move(tx));
break;
default:
case relay_method::forward: // not supposed to happen here
case relay_method::none:
break;
}

1
src/cryptonote_protocol/enums.h
View File

@ -37,6 +37,7 @@ namespace cryptonote
{
none = 0, //!< Received via RPC with `do_not_relay` set
local, //!< Received via RPC; trying to send over i2p/tor, etc.
forward, //!< Received over i2p/tor; timer delayed before ipv4/6 public broadcast
stem, //!< Received/send over network using Dandelion++ stem
fluff, //!< Received/sent over network using Dandelion++ fluff
block //!< Received in block, takes precedence over others

18
src/cryptonote_protocol/levin_notify.cpp
View File

@ -357,11 +357,15 @@ namespace levin
return true;
});
// Always send txs in stem mode over i2p/tor, see comments in `send_txs` below.
/* Always send with `fluff` flag, even over i2p/tor. The hidden service
will disable the forwarding delay and immediately fluff. The i2p/tor
network is therefore replacing the sybil protection of Dandelion++.
Dandelion++ stem phase over i2p/tor is also worth investigating
(with/without "noise"?). */
for (auto& connection : connections)
{
std::sort(connection.first.begin(), connection.first.end()); // don't leak receive order
make_payload_send_txs(*zone_->p2p, std::move(connection.first), connection.second, zone_->pad_txs, zone_->is_public);
make_payload_send_txs(*zone_->p2p, std::move(connection.first), connection.second, zone_->pad_txs, true);
}
if (next_flush != std::chrono::steady_clock::time_point::max())
@ -811,12 +815,11 @@ namespace levin
case relay_method::block:
return false;
case relay_method::stem:
tx_relay = relay_method::fluff; // don't set stempool embargo when skipping to fluff
/* fallthrough */
case relay_method::forward:
case relay_method::local:
if (zone_->is_public)
{
// this will change a local tx to stem or fluff ...
// this will change a local/forward tx to stem or fluff ...
zone_->strand.dispatch(
dandelionpp_notify{zone_, std::addressof(core), std::move(txs), source}
);
@ -824,6 +827,11 @@ namespace levin
}
/* fallthrough */
case relay_method::fluff:
/* If sending stem/forward/local txes over non public networks,
continue to claim that relay mode even though it used the "fluff"
routine. A "fluff" over i2p/tor is not the same as a "fluff" over
ipv4/6. Marking it as "fluff" here will make the tx immediately
visible externally from this node, which is not desired. */
core.on_transactions_relayed(epee::to_span(txs), tx_relay);
zone_->strand.dispatch(fluff_notify{zone_, std::move(txs), source});
break;

254
tests/unit_tests/levin.cpp
View File

@ -676,6 +676,76 @@ TEST_F(levin_notify, local_without_padding)
}
}
TEST_F(levin_notify, forward_without_padding)
{
cryptonote::levin::notify notifier = make_notifier(0, true, false);
for (unsigned count = 0; count < 10; ++count)
add_connection(count % 2 == 0);
{
const auto status = notifier.get_status();
EXPECT_FALSE(status.has_noise);
EXPECT_FALSE(status.connections_filled);
}
notifier.new_out_connection();
io_service_.poll();
std::vector<cryptonote::blobdata> txs(2);
txs[0].resize(100, 'f');
txs[1].resize(200, 'e');
std::vector<cryptonote::blobdata> sorted_txs = txs;
std::sort(sorted_txs.begin(), sorted_txs.end());
ASSERT_EQ(10u, contexts_.size());
bool has_stemmed = false;
bool has_fluffed = false;
while (!has_stemmed || !has_fluffed)
{
auto context = contexts_.begin();
EXPECT_TRUE(notifier.send_txs(txs, context->get_id(), events_, cryptonote::relay_method::forward));
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
const bool is_stem = events_.has_stem_txes();
EXPECT_EQ(txs, events_.take_relayed(is_stem ? cryptonote::relay_method::stem : cryptonote::relay_method::fluff));
if (!is_stem)
{
notifier.run_fluff();
ASSERT_LT(0u, io_service_.poll());
}
std::size_t send_count = 0;
EXPECT_EQ(0u, context->process_send_queue());
for (++context; context != contexts_.end(); ++context)
{
const std::size_t sent = context->process_send_queue();
if (sent && is_stem)
EXPECT_EQ(1u, (context - contexts_.begin()) % 2);
send_count += sent;
}
EXPECT_EQ(is_stem ? 1u : 9u, send_count);
ASSERT_EQ(is_stem ? 1u : 9u, receiver_.notified_size());
for (unsigned count = 0; count < (is_stem ? 1u : 9u); ++count)
{
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
if (is_stem)
EXPECT_EQ(txs, notification.txs);
else
EXPECT_EQ(sorted_txs, notification.txs);
EXPECT_TRUE(notification._.empty());
EXPECT_EQ(!is_stem, notification.dandelionpp_fluff);
}
has_stemmed |= is_stem;
has_fluffed |= !is_stem;
notifier.run_epoch();
}
}
TEST_F(levin_notify, block_without_padding)
{
cryptonote::levin::notify notifier = make_notifier(0, true, false);
@ -914,6 +984,73 @@ TEST_F(levin_notify, local_with_padding)
}
}
TEST_F(levin_notify, forward_with_padding)
{
cryptonote::levin::notify notifier = make_notifier(0, true, true);
for (unsigned count = 0; count < 10; ++count)
add_connection(count % 2 == 0);
{
const auto status = notifier.get_status();
EXPECT_FALSE(status.has_noise);
EXPECT_FALSE(status.connections_filled);
}
notifier.new_out_connection();
io_service_.poll();
std::vector<cryptonote::blobdata> txs(2);
txs[0].resize(100, 'e');
txs[1].resize(200, 'f');
ASSERT_EQ(10u, contexts_.size());
bool has_stemmed = false;
bool has_fluffed = false;
while (!has_stemmed || !has_fluffed)
{
auto context = contexts_.begin();
EXPECT_TRUE(notifier.send_txs(txs, context->get_id(), events_, cryptonote::relay_method::forward));
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
const bool is_stem = events_.has_stem_txes();
EXPECT_EQ(txs, events_.take_relayed(is_stem ? cryptonote::relay_method::stem : cryptonote::relay_method::fluff));
if (!is_stem)
{
notifier.run_fluff();
ASSERT_LT(0u, io_service_.poll());
}
std::size_t send_count = 0;
EXPECT_EQ(0u, context->process_send_queue());
for (++context; context != contexts_.end(); ++context)
{
const std::size_t sent = context->process_send_queue();
if (sent && is_stem)
{
EXPECT_EQ(1u, (context - contexts_.begin()) % 2);
EXPECT_FALSE(context->is_incoming());
}
send_count += sent;
}
EXPECT_EQ(is_stem ? 1u : 9u, send_count);
ASSERT_EQ(is_stem ? 1u : 9u, receiver_.notified_size());
for (unsigned count = 0; count < (is_stem ? 1u : 9u); ++count)
{
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_FALSE(notification._.empty());
EXPECT_EQ(!is_stem, notification.dandelionpp_fluff);
}
has_stemmed |= is_stem;
has_fluffed |= !is_stem;
notifier.run_epoch();
}
}
TEST_F(levin_notify, block_with_padding)
{
cryptonote::levin::notify notifier = make_notifier(0, true, true);
@ -1017,7 +1154,7 @@ TEST_F(levin_notify, private_fluff_without_padding)
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_TRUE(notification._.empty());
EXPECT_FALSE(notification.dandelionpp_fluff);
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}
@ -1053,7 +1190,7 @@ TEST_F(levin_notify, private_stem_without_padding)
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
EXPECT_EQ(txs, events_.take_relayed(cryptonote::relay_method::fluff));
EXPECT_EQ(txs, events_.take_relayed(cryptonote::relay_method::stem));
EXPECT_EQ(0u, context->process_send_queue());
for (++context; context != contexts_.end(); ++context)
@ -1068,7 +1205,7 @@ TEST_F(levin_notify, private_stem_without_padding)
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_TRUE(notification._.empty());
EXPECT_FALSE(notification.dandelionpp_fluff);
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}
@ -1119,7 +1256,58 @@ TEST_F(levin_notify, private_local_without_padding)
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_TRUE(notification._.empty());
EXPECT_FALSE(notification.dandelionpp_fluff);
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}
TEST_F(levin_notify, private_forward_without_padding)
{
// private mode always uses fluff but marked as stem
cryptonote::levin::notify notifier = make_notifier(0, false, false);
for (unsigned count = 0; count < 10; ++count)
add_connection(count % 2 == 0);
{
const auto status = notifier.get_status();
EXPECT_FALSE(status.has_noise);
EXPECT_FALSE(status.connections_filled);
}
notifier.new_out_connection();
io_service_.poll();
std::vector<cryptonote::blobdata> txs(2);
txs[0].resize(100, 'e');
txs[1].resize(200, 'f');
ASSERT_EQ(10u, contexts_.size());
{
auto context = contexts_.begin();
EXPECT_TRUE(notifier.send_txs(txs, context->get_id(), events_, cryptonote::relay_method::forward));
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
notifier.run_fluff();
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
EXPECT_EQ(txs, events_.take_relayed(cryptonote::relay_method::forward));
EXPECT_EQ(0u, context->process_send_queue());
for (++context; context != contexts_.end(); ++context)
{
const bool is_incoming = ((context - contexts_.begin()) % 2 == 0);
EXPECT_EQ(is_incoming ? 0u : 1u, context->process_send_queue());
}
ASSERT_EQ(5u, receiver_.notified_size());
for (unsigned count = 0; count < 5; ++count)
{
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_TRUE(notification._.empty());
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}
@ -1229,7 +1417,7 @@ TEST_F(levin_notify, private_fluff_with_padding)
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_FALSE(notification._.empty());
EXPECT_FALSE(notification.dandelionpp_fluff);
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}
@ -1264,7 +1452,7 @@ TEST_F(levin_notify, private_stem_with_padding)
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
EXPECT_EQ(txs, events_.take_relayed(cryptonote::relay_method::fluff));
EXPECT_EQ(txs, events_.take_relayed(cryptonote::relay_method::stem));
EXPECT_EQ(0u, context->process_send_queue());
for (++context; context != contexts_.end(); ++context)
@ -1279,7 +1467,7 @@ TEST_F(levin_notify, private_stem_with_padding)
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_FALSE(notification._.empty());
EXPECT_FALSE(notification.dandelionpp_fluff);
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}
@ -1329,7 +1517,57 @@ TEST_F(levin_notify, private_local_with_padding)
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_FALSE(notification._.empty());
EXPECT_FALSE(notification.dandelionpp_fluff);
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}
TEST_F(levin_notify, private_forward_with_padding)
{
cryptonote::levin::notify notifier = make_notifier(0, false, true);
for (unsigned count = 0; count < 10; ++count)
add_connection(count % 2 == 0);
{
const auto status = notifier.get_status();
EXPECT_FALSE(status.has_noise);
EXPECT_FALSE(status.connections_filled);
}
notifier.new_out_connection();
io_service_.poll();
std::vector<cryptonote::blobdata> txs(2);
txs[0].resize(100, 'e');
txs[1].resize(200, 'f');
ASSERT_EQ(10u, contexts_.size());
{
auto context = contexts_.begin();
EXPECT_TRUE(notifier.send_txs(txs, context->get_id(), events_, cryptonote::relay_method::forward));
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
notifier.run_fluff();
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
EXPECT_EQ(txs, events_.take_relayed(cryptonote::relay_method::forward));
EXPECT_EQ(0u, context->process_send_queue());
for (++context; context != contexts_.end(); ++context)
{
const bool is_incoming = ((context - contexts_.begin()) % 2 == 0);
EXPECT_EQ(is_incoming ? 0u : 1u, context->process_send_queue());
}
ASSERT_EQ(5u, receiver_.notified_size());
for (unsigned count = 0; count < 5; ++count)
{
auto notification = receiver_.get_notification<cryptonote::NOTIFY_NEW_TRANSACTIONS>().second;
EXPECT_EQ(txs, notification.txs);
EXPECT_FALSE(notification._.empty());
EXPECT_TRUE(notification.dandelionpp_fluff);
}
}
}