r0 = socket$nl_xfrm(0x10, 0x3, 0x6)
sendmsg$nl_xfrm(r0, &(0x7f0000002e00)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000300)=@updsa={0x13c, 0x18, 0x1, 0x0, 0x0, {{@in6=@mcast2, @in6=@private0}, {}, @in6=@mcast2}, [@algo_aead={0x4c, 0x12, {{'rfc4106(gcm(aes))\x00'}}}]}, 0x13c}}, 0x0)