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Merge pull request #7154

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cf7e1571d protocol: reject claimed block hashes that already are in the chain (moneromooo-monero)
af0a25544 protocol: drop peers we can't download anything from in sync mode (moneromooo-monero)
This commit is contained in:
Alexander Blair 2020-12-26 13:40:36 -08:00
commit 609dbe6b92
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GPG Key ID: C64552D877C32479
3 changed files with 20 additions and 19 deletions
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37
src/cryptonote_protocol/cryptonote_protocol_handler.inl
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@ -2298,30 +2298,16 @@ 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:
@ -2562,6 +2548,8 @@ skip:
}
std::unordered_set<crypto::hash> hashes;
uint64_t height = arg.start_height;
const uint64_t blockchain_height = m_core.get_current_blockchain_height();
for (const auto &h: arg.m_block_ids)
{
if (!hashes.insert(h).second)
@ -2570,6 +2558,17 @@ skip:
drop_connection(context, true, false);
return 1;
}
if (height < blockchain_height)
{
const crypto::hash block_in_chain = m_core.get_block_id_by_height(height);
if ((height < context.m_expect_height - 1 && block_in_chain == h) || (height == context.m_expect_height - 1 && block_in_chain != h))
{
LOG_ERROR_CCONTEXT("sent existing block " << h << " at height " << height << ", expected height was " << context.m_expect_height << ", dropping connection");
drop_connection(context, true, false);
return 1;
}
}
++height;
}
uint64_t n_use_blocks = m_core.prevalidate_block_hashes(arg.start_height, arg.m_block_ids, arg.m_block_weights);

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() {}
};