+ t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
+ if (th0)
+ {
+ clib_memcpy (&t0->tcp_header, th0, sizeof (t0->tcp_header));
+ }
+ else
+ {
+ memset (&t0->tcp_header, 0, sizeof (t0->tcp_header));
+ }
+ clib_memcpy (&t0->tcp_connection, tc0,
+ sizeof (t0->tcp_connection));