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Merge pull request #7206 

8c8f3d73b protocol: fix false positives dropping peers (moneromooo-monero)
This commit is contained in:
Alexander Blair 2020-12-28 11:40:25 -08:00
parent 75e9e7b39a 8c8f3d73b5
commit 5804add75b
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GPG Key ID: C64552D877C32479
3 changed files with 23 additions and 23 deletions
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44
src/cryptonote_protocol/cryptonote_protocol_handler.inl
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@ -2064,8 +2064,14 @@ skip:
// get rid of blocks we already requested, or already have
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;
if (context.m_remote_blockchain_height > m_block_queue.get_next_needed_height(bc_height))
{
MERROR(context << "Nothing we can request from this peer, and we did not request anything previously");
return false;
}
MDEBUG(context << "Nothing to get from this peer, and it's not ahead of us, all done");
context.m_state = cryptonote_connection_context::state_normal;
return true;
}
uint64_t next_needed_height = m_block_queue.get_next_needed_height(bc_height);
uint64_t next_block_height;
@ -2204,8 +2210,14 @@ skip:
}
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;
if (context.m_remote_blockchain_height > m_block_queue.get_next_needed_height(m_core.get_current_blockchain_height()))
{
MERROR(context << "Nothing we can request from this peer, and we did not request anything previously");
return false;
}
MDEBUG(context << "Nothing to get from this peer, and it's not ahead of us, all done");
context.m_state = cryptonote_connection_context::state_normal;
return true;
}
const uint64_t first_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
@ -2309,30 +2321,16 @@ skip:
return true;
}
// if we're still around, we might be at a point where the peer is pruned, so we could either
// drop it to make space for other peers, or ask for a span further down the line
const uint32_t next_stripe = get_next_needed_pruning_stripe().first;
const uint32_t peer_stripe = tools::get_pruning_stripe(context.m_pruning_seed);
const uint32_t local_stripe = tools::get_pruning_stripe(m_core.get_blockchain_pruning_seed());
if (!(m_sync_pruned_blocks && peer_stripe == local_stripe) && next_stripe && peer_stripe && next_stripe != peer_stripe)
// we can do nothing, so drop this peer to make room for others unless we think we've downloaded all we need
const uint64_t blockchain_height = m_core.get_current_blockchain_height();
if (std::max(blockchain_height, m_block_queue.get_next_needed_height(blockchain_height)) >= m_core.get_target_blockchain_height())
{
// at this point, we have to either close the connection, or start getting blocks past the
// current point, or become dormant
MDEBUG(context << "this peer is pruned at seed " << epee::string_tools::to_string_hex(context.m_pruning_seed) <<
", next stripe needed is " << next_stripe);
if (!context.m_is_income)
{
if (should_drop_connection(context, next_stripe))
{
m_p2p->add_used_stripe_peer(context);
return false; // drop outgoing connections
}
}
// we'll get back stuck waiting for the go ahead
context.m_state = cryptonote_connection_context::state_normal;
MLOG_PEER_STATE("Nothing to do for now, switching to normal state");
return true;
}
MLOG_PEER_STATE("We can download nothing from this peer, dropping");
return false;
}
skip:

1
tests/core_proxy/core_proxy.h
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@ -112,5 +112,6 @@ namespace tests
bool prune_blockchain(uint32_t pruning_seed) const { return true; }
bool get_txpool_complement(const std::vector<crypto::hash> &hashes, std::vector<cryptonote::blobdata> &txes) { return false; }
bool get_pool_transaction_hashes(std::vector<crypto::hash>& txs, bool include_unrelayed_txes = true) const { return false; }
crypto::hash get_block_id_by_height(uint64_t height) const { return crypto::null_hash; }
};
}

1
tests/unit_tests/node_server.cpp
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@ -93,6 +93,7 @@ public:
bool has_block_weights(uint64_t height, uint64_t nblocks) const { return false; }
bool get_txpool_complement(const std::vector<crypto::hash> &hashes, std::vector<cryptonote::blobdata> &txes) { return false; }
bool get_pool_transaction_hashes(std::vector<crypto::hash>& txs, bool include_unrelayed_txes = true) const { return false; }
crypto::hash get_block_id_by_height(uint64_t height) const { return crypto::null_hash; }
void stop() {}
};