r0 = socket$nl_xfrm(0x10, 0x3, 0x6)
sendmsg$nl_xfrm(r0, &(0x7f0000002e00)={0x0, 0x0, &(0x7f0000002dc0)={&(0x7f0000000180)=@updsa={0x158, 0x1a, 0x1, 0x0, 0x0, {{@in6=@loopback, @in=@remote}, {@in=@local, 0x0, 0x33}, @in6=@remote, {}, {}, {}, 0x0, 0x0, 0xa}, [@algo_auth_trunc={0x4c, 0x14, {{'sha256\x00'}}}, @encap={0x1c, 0x4, {0x0, 0x0, 0x0, @in=@private}}]}, 0x158}}, 0x0)