t_src4
sc->sc_tunnel.t_src4 = src4->sin_addr;
sin->sin_addr = sc->sc_tunnel.t_src4;
ip->ip_src = sc->sc_tunnel.t_src4;
key.t_src4 = ip->ip_dst;
ip->ip_src = sc->sc_tunnel.t_src4;
sin->sin_addr = tunnel->t_src4;
tunnel->t_src4 = src4->sin_addr;
key.t_src4 = ip->ip_dst;
ip->ip_src = tunnel->t_src4;
tunnel->t_src4 = addr4->sin_addr;
sin->sin_addr = tunnel->t_src4;
tunnel->t_src4 = src4->sin_addr;
sin->sin_addr = tunnel->t_src4;
tunnel->t_src4 = src4->sin_addr;
sin->sin_addr = tunnel->t_src4;
key.t_src4 = ip->ip_dst;