r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
setsockopt$inet6_IPV6_FLOWLABEL_MGR(r0, 0x29, 0x20, &(0x7f00000001c0)={@private1, 0x800, 0x0, 0xff, 0x3}, 0x20)