r0 = socket$nl_xfrm(0x10, 0x3, 0x6)
sendmsg$nl_xfrm(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000002480)={&(0x7f0000000180)=@allocspi={0x100, 0x16, 0x1, 0x0, 0x0, {{{@in6=@mcast1, @in6=@initdev={0xfe, 0x88, '\x00', 0x0, 0x0}}, {@in=@loopback, 0x0, 0x33}, @in6=@empty}}, [@XFRMA_IF_ID={0x8}]}, 0x100}}, 0x0)