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Fixed i2p/tor tx flooding bug (white noise disabled)

This commit is contained in:
Lee Clagett 2019-09-20 11:16:18 -04:00
parent 2c171a9b02
commit 2a7d91523b
4 changed files with 99 additions and 21 deletions
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17
src/cryptonote_protocol/levin_notify.cpp
View File

@ -187,14 +187,15 @@ namespace levin
{
struct zone
{
explicit zone(boost::asio::io_service& io_service, std::shared_ptr<connections> p2p, epee::byte_slice noise_in)
explicit zone(boost::asio::io_service& io_service, std::shared_ptr<connections> p2p, epee::byte_slice noise_in, bool is_public)
: p2p(std::move(p2p)),
noise(std::move(noise_in)),
next_epoch(io_service),
strand(io_service),
map(),
channels(),
connection_count(0)
connection_count(0),
is_public(is_public)
{
for (std::size_t count = 0; !noise.empty() && count < CRYPTONOTE_NOISE_CHANNELS; ++count)
channels.emplace_back(io_service);
@ -207,6 +208,7 @@ namespace levin
net::dandelionpp::connection_map map;//!< Tracks outgoing uuid's for noise channels or Dandelion++ stems
std::deque<noise_channel> channels; //!< Never touch after init; only update elements on `noise_channel.strand`
std::atomic<std::size_t> connection_count; //!< Only update in strand, can be read at any time
const bool is_public; //!< Zone is public ipv4/ipv6 connections
};
} // detail
@ -276,7 +278,10 @@ namespace levin
std::vector<boost::uuids::uuid> connections;
connections.reserve(connection_id_reserve_size);
zone_->p2p->foreach_connection([this, &connections] (detail::p2p_context& context) {
if (this->source_ != context.m_connection_id)
/* Only send to outgoing connections when "flooding" over i2p/tor.
Otherwise this makes the tx linkable to a hidden service address,
making things linkable across connections. */
if (this->source_ != context.m_connection_id && (this->zone_->is_public || !context.m_is_income))
connections.emplace_back(context.m_connection_id);
return true;
});
@ -476,8 +481,8 @@ namespace levin
};
} // anonymous
notify::notify(boost::asio::io_service& service, std::shared_ptr<connections> p2p, epee::byte_slice noise)
: zone_(std::make_shared<detail::zone>(service, std::move(p2p), std::move(noise)))
notify::notify(boost::asio::io_service& service, std::shared_ptr<connections> p2p, epee::byte_slice noise, bool is_public)
: zone_(std::make_shared<detail::zone>(service, std::move(p2p), std::move(noise), is_public))
{
if (!zone_->p2p)
throw std::logic_error{"cryptonote::levin::notify cannot have nullptr p2p argument"};
@ -528,7 +533,7 @@ namespace levin
channel.next_noise.cancel();
}
bool notify::send_txs(std::vector<cryptonote::blobdata> txs, const boost::uuids::uuid& source, const bool pad_txs)
bool notify::send_txs(std::vector<blobdata> txs, const boost::uuids::uuid& source, const bool pad_txs)
{
if (!zone_)
return false;

2
src/cryptonote_protocol/levin_notify.h
View File

@ -86,7 +86,7 @@ namespace levin
{}
//! Construct an instance with available notification `zones`.
explicit notify(boost::asio::io_service& service, std::shared_ptr<connections> p2p, epee::byte_slice noise);
explicit notify(boost::asio::io_service& service, std::shared_ptr<connections> p2p, epee::byte_slice noise, bool is_public);
notify(const notify&) = delete;
notify(notify&&) = default;

4
src/p2p/net_node.inl
View File

@ -384,7 +384,7 @@ namespace nodetool
m_use_ipv6 = command_line::get_arg(vm, arg_p2p_use_ipv6);
m_require_ipv4 = command_line::get_arg(vm, arg_p2p_require_ipv4);
public_zone.m_notifier = cryptonote::levin::notify{
public_zone.m_net_server.get_io_service(), public_zone.m_net_server.get_config_shared(), nullptr
public_zone.m_net_server.get_io_service(), public_zone.m_net_server.get_config_shared(), nullptr, true
};
if (command_line::has_arg(vm, arg_p2p_add_peer))
@ -495,7 +495,7 @@ namespace nodetool
}
zone.m_notifier = cryptonote::levin::notify{
zone.m_net_server.get_io_service(), zone.m_net_server.get_config_shared(), std::move(this_noise)
zone.m_net_server.get_io_service(), zone.m_net_server.get_config_shared(), std::move(this_noise), false
};
}

97
tests/unit_tests/levin.cpp
View File

@ -38,6 +38,7 @@
#include "byte_slice.h"
#include "crypto/crypto.h"
#include "cryptonote_basic/connection_context.h"
#include "cryptonote_core/cryptonote_core.h"
#include "cryptonote_protocol/cryptonote_protocol_defs.h"
#include "cryptonote_protocol/levin_notify.h"
#include "int-util.h"
@ -119,12 +120,13 @@ namespace
epee::levin::async_protocol_handler<cryptonote::levin::detail::p2p_context> handler_;
public:
test_connection(boost::asio::io_service& io_service, cryptonote::levin::connections& connections, boost::uuids::random_generator& random_generator)
: context_(),
endpoint_(io_service),
test_connection(boost::asio::io_service& io_service, cryptonote::levin::connections& connections, boost::uuids::random_generator& random_generator, const bool is_incoming)
: endpoint_(io_service),
context_(),
handler_(std::addressof(endpoint_), connections, context_)
{
const_cast<boost::uuids::uuid&>(context_.m_connection_id) = random_generator();
using base_type = epee::net_utils::connection_context_base;
static_cast<base_type&>(context_) = base_type{random_generator(), {}, is_incoming, false};
handler_.after_init_connection();
}
@ -262,19 +264,19 @@ namespace
EXPECT_EQ(0u, receiver_.notified_size());
}
void add_connection()
void add_connection(const bool is_incoming)
{
contexts_.emplace_back(io_service_, *connections_, random_generator_);
contexts_.emplace_back(io_service_, *connections_, random_generator_, is_incoming);
EXPECT_TRUE(connection_ids_.emplace(contexts_.back().get_id()).second);
EXPECT_EQ(connection_ids_.size(), connections_->get_connections_count());
}
cryptonote::levin::notify make_notifier(const std::size_t noise_size)
cryptonote::levin::notify make_notifier(const std::size_t noise_size, bool is_public)
{
epee::byte_slice noise = nullptr;
if (noise_size)
noise = epee::levin::make_noise_notify(noise_size);
return cryptonote::levin::notify{io_service_, connections_, std::move(noise)};
return cryptonote::levin::notify{io_service_, connections_, std::move(noise), is_public};
}
boost::uuids::random_generator random_generator_;
@ -437,10 +439,10 @@ TEST_F(levin_notify, defaulted)
TEST_F(levin_notify, flood)
{
cryptonote::levin::notify notifier = make_notifier(0);
cryptonote::levin::notify notifier = make_notifier(0, true);
for (unsigned count = 0; count < 10; ++count)
add_connection();
add_connection(count % 2 == 0);
{
const auto status = notifier.get_status();
@ -500,16 +502,87 @@ TEST_F(levin_notify, flood)
}
}
TEST_F(levin_notify, private_flood)
{
cryptonote::levin::notify notifier = make_notifier(0, 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();
{
const auto status = notifier.get_status();
EXPECT_FALSE(status.has_noise);
EXPECT_FALSE(status.connections_filled); // not tracked
}
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(), false));
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
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());
}
}
ASSERT_EQ(10u, contexts_.size());
{
auto context = contexts_.begin();
EXPECT_TRUE(notifier.send_txs(txs, context->get_id(), true));
io_service_.reset();
ASSERT_LT(0u, io_service_.poll());
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());
}
}
}
TEST_F(levin_notify, noise)
{
for (unsigned count = 0; count < 10; ++count)
add_connection();
add_connection(count % 2 == 0);
std::vector<cryptonote::blobdata> txs(1);
txs[0].resize(1900, 'h');
const boost::uuids::uuid incoming_id = random_generator_();
cryptonote::levin::notify notifier = make_notifier(2048);
cryptonote::levin::notify notifier = make_notifier(2048, false);
{
const auto status = notifier.get_status();