Initialize buffer len in server.c

packet-exchange/src/server.c

@@ -131,6 +131,7 @@ int main(int argc, char *argv[]) {
   param.tsn_task = RECV_PACKET_TASK;
 
   main_param.refresh_rate = 50000;
+  main_param.tx_buffer_len = 1024;
 
   // Process bash options
   process_options(argc, argv, &param, &main_param);