r0 = socket$inet6_udplite(0xa, 0x2, 0x88)
setsockopt$inet6_IPV6_RTHDR(r0, 0x29, 0x39, &(0x7f0000000040)={0x0, 0x4, 0x4, 0x0, 0x0, [@ipv4={'\x00', '\xff\xff', @loopback}, @private0]}, 0x28)