Merge pull request #5097 from greymass/net-unexpected-peer

Log which peer gives unexpected length messages

plugins/net_plugin/net_plugin.cpp

@@ -2122,7 +2122,8 @@ namespace eosio {
                            auto index = conn->pending_message_buffer.read_index();
                            conn->pending_message_buffer.peek(&message_length, sizeof(message_length), index);
                            if(message_length > def_send_buffer_size*2 || message_length == 0) {
-                              elog("incoming message length unexpected (${i})", ("i", message_length));
+                              boost::system::error_code ec;
+                              elog("incoming message length unexpected (${i}), from ${p}", ("i", message_length)("p",boost::lexical_cast<std::string>(conn->socket->remote_endpoint(ec))));
                               close(conn);
                               return;
                            }