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protocol: drop nodes if they claim new data but only give stale data

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Some joker is spending time actually doing this
This commit is contained in:
moneromooo-monero 2020-12-25 20:29:11 +00:00
parent 3bd6ed94d7
commit efe83982d3
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GPG Key ID: 686F07454D6CEFC3
3 changed files with 18 additions and 5 deletions
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3
src/cryptonote_basic/connection_context.h
View File

@ -44,7 +44,7 @@ namespace cryptonote
cryptonote_connection_context(): m_state(state_before_handshake), m_remote_blockchain_height(0), m_last_response_height(0),
m_last_request_time(boost::date_time::not_a_date_time), m_callback_request_count(0),
m_last_known_hash(crypto::null_hash), m_pruning_seed(0), m_rpc_port(0), m_rpc_credits_per_hash(0), m_anchor(false), m_score(0),
m_expect_response(0) {}
m_expect_response(0), m_num_requested(0) {}
enum state
{
@ -70,6 +70,7 @@ namespace cryptonote
int32_t m_score;
int m_expect_response;
uint64_t m_expect_height;
size_t m_num_requested;
};
inline std::string get_protocol_state_string(cryptonote_connection_context::state s)

2
src/cryptonote_protocol/cryptonote_protocol_handler.h
View File

@ -150,7 +150,7 @@ namespace cryptonote
bool update_sync_search();
int try_add_next_blocks(cryptonote_connection_context &context);
void notify_new_stripe(cryptonote_connection_context &context, uint32_t stripe);
void skip_unneeded_hashes(cryptonote_connection_context& context, bool check_block_queue) const;
size_t skip_unneeded_hashes(cryptonote_connection_context& context, bool check_block_queue) const;
bool request_txpool_complement(cryptonote_connection_context &context);
void hit_score(cryptonote_connection_context &context, int32_t score);

18
src/cryptonote_protocol/cryptonote_protocol_handler.inl
View File

@ -409,6 +409,7 @@ namespace cryptonote
++context.m_callback_request_count;
m_p2p->request_callback(context);
MLOG_PEER_STATE("requesting callback");
context.m_num_requested = 0;
return true;
}
//------------------------------------------------------------------------------------------------------------------------
@ -1990,7 +1991,7 @@ skip:
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::skip_unneeded_hashes(cryptonote_connection_context& context, bool check_block_queue) const
size_t t_cryptonote_protocol_handler<t_core>::skip_unneeded_hashes(cryptonote_connection_context& context, bool check_block_queue) const
{
// take out blocks we already have
size_t skip = 0;
@ -2007,6 +2008,7 @@ skip:
MDEBUG(context << "skipping " << skip << "/" << context.m_needed_objects.size() << " blocks");
context.m_needed_objects = std::vector<std::pair<crypto::hash, uint64_t>>(context.m_needed_objects.begin() + skip, context.m_needed_objects.end());
}
return skip;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
@ -2060,7 +2062,11 @@ skip:
const size_t block_queue_size_threshold = m_block_download_max_size ? m_block_download_max_size : BLOCK_QUEUE_SIZE_THRESHOLD;
bool queue_proceed = nspans < BLOCK_QUEUE_NSPANS_THRESHOLD || size < block_queue_size_threshold;
// get rid of blocks we already requested, or already have
skip_unneeded_hashes(context, true);
if (skip_unneeded_hashes(context, true) && context.m_needed_objects.empty() && context.m_num_requested == 0)
{
MERROR(context << "Nothing we can request from this peer, and we did not request anything previously");
return false;
}
uint64_t next_needed_height = m_block_queue.get_next_needed_height(bc_height);
uint64_t next_block_height;
if (context.m_needed_objects.empty())
@ -2196,7 +2202,11 @@ skip:
context.m_last_response_height = 0;
goto skip;
}
skip_unneeded_hashes(context, false);
if (skip_unneeded_hashes(context, false) && context.m_needed_objects.empty() && context.m_num_requested == 0)
{
MERROR(context << "Nothing we can request from this peer, and we did not request anything previously");
return false;
}
const uint64_t first_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
static const uint64_t bp_fork_height = m_core.get_earliest_ideal_height_for_version(8);
@ -2293,6 +2303,7 @@ skip:
<< "/" << tools::get_pruning_stripe(span.first + span.second - 1, context.m_remote_blockchain_height, CRYPTONOTE_PRUNING_LOG_STRIPES)
<< ", ours " << tools::get_pruning_stripe(m_core.get_blockchain_pruning_seed()) << ", peer stripe " << tools::get_pruning_stripe(context.m_pruning_seed));
context.m_num_requested += req.blocks.size();
post_notify<NOTIFY_REQUEST_GET_OBJECTS>(req, context);
MLOG_PEER_STATE("requesting objects");
return true;
@ -2608,6 +2619,7 @@ skip:
if (arg.total_height > m_core.get_target_blockchain_height())
m_core.set_target_blockchain_height(arg.total_height);
context.m_num_requested = 0;
return 1;
}
//------------------------------------------------------------------------------------------------------------------------