r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$netlink(r0, &(0x7f0000000380)={0x0, 0x0, &(0x7f0000000200)=[{&(0x7f0000000180)={0x30, 0x10, 0x50b, 0x0, 0x0, "", [@typed={0xc, 0x0, 0x0, 0x0, @u64=0x5}, @typed={0x14, 0x0, 0x0, 0x0, @ipv6=@mcast1}]}, 0x30}], 0x1}, 0x0)