clib_memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
b0->current_data = 0;
b0->current_length = vec_len (fr->rewrite);
clib_memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
b0->current_data = 0;
b0->current_length = vec_len (fr->rewrite);