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protocol: more sanity checks in new chain block hashes
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0aa541b361
@ -2758,32 +2758,44 @@ void Blockchain::flush_invalid_blocks()
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m_invalid_blocks.clear();
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}
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//------------------------------------------------------------------
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bool Blockchain::have_block(const crypto::hash& id) const
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bool Blockchain::have_block_unlocked(const crypto::hash& id, int *where) const
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{
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// WARNING: this function does not take m_blockchain_lock, and thus should only call read only
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// m_db functions which do not depend on one another (ie, no getheight + gethash(height-1), as
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// well as not accessing class members, even read only (ie, m_invalid_blocks). The caller must
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// lock if it is otherwise needed.
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LOG_PRINT_L3("Blockchain::" << __func__);
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CRITICAL_REGION_LOCAL(m_blockchain_lock);
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if(m_db->block_exists(id))
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{
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LOG_PRINT_L2("block " << id << " found in main chain");
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if (where) *where = HAVE_BLOCK_MAIN_CHAIN;
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return true;
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}
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if(m_db->get_alt_block(id, NULL, NULL))
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{
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LOG_PRINT_L2("block " << id << " found in alternative chains");
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if (where) *where = HAVE_BLOCK_ALT_CHAIN;
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return true;
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}
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if(m_invalid_blocks.count(id))
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{
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LOG_PRINT_L2("block " << id << " found in m_invalid_blocks");
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if (where) *where = HAVE_BLOCK_INVALID;
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return true;
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}
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return false;
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}
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//------------------------------------------------------------------
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bool Blockchain::have_block(const crypto::hash& id, int *where) const
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{
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CRITICAL_REGION_LOCAL(m_blockchain_lock);
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return have_block_unlocked(id, where);
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}
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//------------------------------------------------------------------
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bool Blockchain::handle_block_to_main_chain(const block& bl, block_verification_context& bvc, bool notify/* = true*/)
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{
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LOG_PRINT_L3("Blockchain::" << __func__);
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@ -377,10 +377,12 @@ namespace cryptonote
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* for a block with the given hash
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*
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* @param id the hash to search for
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* @param where the type of block, if non NULL
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*
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* @return true if the block is known, else false
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*/
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bool have_block(const crypto::hash& id) const;
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bool have_block_unlocked(const crypto::hash& id, int *where = NULL) const;
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bool have_block(const crypto::hash& id, int *where = NULL) const;
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/**
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* @brief gets the total number of transactions on the main chain
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@ -1625,9 +1625,14 @@ namespace cryptonote
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return m_mempool.get_transactions_count(include_sensitive_txes);
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}
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//-----------------------------------------------------------------------------------------------
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bool core::have_block(const crypto::hash& id) const
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bool core::have_block_unlocked(const crypto::hash& id, int *where) const
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{
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return m_blockchain_storage.have_block(id);
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return m_blockchain_storage.have_block_unlocked(id, where);
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}
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//-----------------------------------------------------------------------------------------------
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bool core::have_block(const crypto::hash& id, int *where) const
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{
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return m_blockchain_storage.have_block(id, where);
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}
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//-----------------------------------------------------------------------------------------------
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bool core::parse_tx_from_blob(transaction& tx, crypto::hash& tx_hash, const blobdata& blob) const
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@ -55,6 +55,8 @@
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PUSH_WARNINGS
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DISABLE_VS_WARNINGS(4355)
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enum { HAVE_BLOCK_MAIN_CHAIN, HAVE_BLOCK_ALT_CHAIN, HAVE_BLOCK_INVALID };
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namespace cryptonote
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{
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struct test_options {
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@ -543,7 +545,8 @@ namespace cryptonote
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*
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* @note see Blockchain::have_block
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*/
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bool have_block(const crypto::hash& id) const;
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bool have_block_unlocked(const crypto::hash& id, int *where = NULL) const;
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bool have_block(const crypto::hash& id, int *where = NULL) const;
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/**
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* @copydoc Blockchain::get_short_chain_history
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@ -2570,17 +2570,6 @@ skip:
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return 1;
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}
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std::unordered_set<crypto::hash> hashes;
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for (const auto &h: arg.m_block_ids)
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{
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if (!hashes.insert(h).second)
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{
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LOG_ERROR_CCONTEXT("sent duplicate block, dropping connection");
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drop_connection(context, true, false);
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return 1;
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}
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}
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uint64_t n_use_blocks = m_core.prevalidate_block_hashes(arg.start_height, arg.m_block_ids, arg.m_block_weights);
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if (n_use_blocks == 0 || n_use_blocks + HASH_OF_HASHES_STEP <= arg.m_block_ids.size())
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{
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@ -2592,18 +2581,69 @@ skip:
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context.m_needed_objects.clear();
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uint64_t added = 0;
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std::unordered_set<crypto::hash> blocks_found;
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bool first = true;
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bool expect_unknown = false;
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for (size_t i = 0; i < arg.m_block_ids.size(); ++i)
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{
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if (!blocks_found.insert(arg.m_block_ids[i]).second)
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{
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LOG_ERROR_CCONTEXT("Duplicate blocks in chain entry response, dropping connection");
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drop_connection(context, true, false);
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drop_connection_with_score(context, 5, false);
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return 1;
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}
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int where;
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const bool have_block = m_core.have_block_unlocked(arg.m_block_ids[i], &where);
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if (first && !have_block)
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{
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LOG_ERROR_CCONTEXT("First block hash is unknown, dropping connection");
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drop_connection_with_score(context, 5, false);
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return 1;
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}
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if (!first)
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{
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// after the first, blocks may be known or unknown, but if they are known,
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// they should be at the same height if on the main chain
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if (have_block)
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{
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switch (where)
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{
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default:
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case HAVE_BLOCK_INVALID:
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LOG_ERROR_CCONTEXT("Block is invalid or known without known type, dropping connection");
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drop_connection(context, true, false);
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return 1;
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case HAVE_BLOCK_MAIN_CHAIN:
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if (expect_unknown)
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{
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LOG_ERROR_CCONTEXT("Block is on the main chain, but we did not expect a known block, dropping connection");
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drop_connection_with_score(context, 5, false);
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return 1;
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}
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if (m_core.get_block_id_by_height(arg.start_height + i) != arg.m_block_ids[i])
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{
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LOG_ERROR_CCONTEXT("Block is on the main chain, but not at the expected height, dropping connection");
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drop_connection_with_score(context, 5, false);
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return 1;
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}
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break;
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case HAVE_BLOCK_ALT_CHAIN:
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if (expect_unknown)
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{
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LOG_ERROR_CCONTEXT("Block is on the main chain, but we did not expect a known block, dropping connection");
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drop_connection_with_score(context, 5, false);
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return 1;
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}
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break;
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}
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}
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else
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expect_unknown = true;
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}
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const uint64_t block_weight = arg.m_block_weights.empty() ? 0 : arg.m_block_weights[i];
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context.m_needed_objects.push_back(std::make_pair(arg.m_block_ids[i], block_weight));
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if (++added == n_use_blocks)
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break;
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first = false;
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}
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context.m_last_response_height -= arg.m_block_ids.size() - n_use_blocks;
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@ -245,12 +245,17 @@ bool tests::proxy_core::init(const boost::program_options::variables_map& /*vm*/
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return true;
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}
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bool tests::proxy_core::have_block(const crypto::hash& id) {
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bool tests::proxy_core::have_block_unlocked(const crypto::hash& id, int *where) {
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if (m_hash2blkidx.end() == m_hash2blkidx.find(id))
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return false;
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if (where) *where = HAVE_BLOCK_MAIN_CHAIN;
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return true;
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}
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bool tests::proxy_core::have_block(const crypto::hash& id, int *where) {
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return have_block_unlocked(id, where);
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}
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void tests::proxy_core::build_short_history(std::list<crypto::hash> &m_history, const crypto::hash &m_start) {
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m_history.push_front(get_block_hash(m_genesis));
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/*std::unordered_map<crypto::hash, tests::block_index>::const_iterator cit = m_hash2blkidx.find(m_lastblk);
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@ -74,7 +74,8 @@ namespace tests
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bool init(const boost::program_options::variables_map& vm);
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bool deinit(){return true;}
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bool get_short_chain_history(std::list<crypto::hash>& ids);
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bool have_block(const crypto::hash& id);
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bool have_block(const crypto::hash& id, int *where = NULL);
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bool have_block_unlocked(const crypto::hash& id, int *where = NULL);
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void get_blockchain_top(uint64_t& height, crypto::hash& top_id);
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bool handle_incoming_tx(const cryptonote::tx_blob_entry& tx_blob, cryptonote::tx_verification_context& tvc, cryptonote::relay_method tx_relay, bool relayed);
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bool handle_incoming_txs(const std::vector<cryptonote::tx_blob_entry>& tx_blobs, std::vector<cryptonote::tx_verification_context>& tvc, cryptonote::relay_method tx_relay, bool relayed);
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@ -55,7 +55,8 @@ public:
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bool init(const boost::program_options::variables_map& vm) {return true ;}
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bool deinit(){return true;}
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bool get_short_chain_history(std::list<crypto::hash>& ids) const { return true; }
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bool have_block(const crypto::hash& id) const {return true;}
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bool have_block(const crypto::hash& id, int *where = NULL) const {return false;}
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bool have_block_unlocked(const crypto::hash& id, int *where = NULL) const {return false;}
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void get_blockchain_top(uint64_t& height, crypto::hash& top_id)const{height=0;top_id=crypto::null_hash;}
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bool handle_incoming_tx(const cryptonote::tx_blob_entry& tx_blob, cryptonote::tx_verification_context& tvc, cryptonote::relay_method tx_relay, bool relayed) { return true; }
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bool handle_incoming_txs(const std::vector<cryptonote::tx_blob_entry>& tx_blob, std::vector<cryptonote::tx_verification_context>& tvc, cryptonote::relay_method tx_relay, bool relayed) { return true; }
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