r0 = socket$netlink(0x10, 0x3, 0x0)
sendmsg$nl_generic(r0, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000300)={&(0x7f0000000400)={0x30, 0x1a, 0xc21, 0x0, 0x0, {0xa}, [@nested={0x1c, 0x0, 0x0, 0x1, [@typed={0x4}, @typed={0x14, 0x2, 0x0, 0x0, @ipv6=@loopback}]}]}, 0x30}}, 0x0)