r0 = socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$sock_SIOCADDRT(r0, 0x890b, &(0x7f0000000240)={0x0, @l2={0x1f, 0x0, @fixed}, @phonet, @in={0x2, 0x0, @multicast2}})