r0 = socket$inet6(0xa, 0x1, 0x0)
setsockopt$inet6_IPV6_RTHDR(r0, 0x29, 0x39, &(0x7f0000000100)={0x0, 0x4, 0x4, 0x0, 0x0, [@initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, @ipv4={'\x00', '\xff\xff', @initdev={0xac, 0x1e, 0x0, 0x0}}]}, 0x28)