r0 = socket$inet6_udp(0xa, 0x2, 0x0)
setsockopt$inet6_opts(r0, 0x29, 0x3b, &(0x7f00000000c0)=@routing={0x0, 0x0, 0x0, 0x0, 0x0, [@empty, @dev]}, 0x14)