r0 = socket$nl_xfrm(0x10, 0x3, 0x6)
sendmsg$nl_xfrm(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000002c0)=@delsa={0x3c, 0x11, 0x103, 0x0, 0x0, {@in6=@loopback, 0x0, 0xa}, [@srcaddr={0x14, 0xd, @in=@multicast1}]}, 0x3c}}, 0x0)