r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = fcntl$dupfd(r0, 0x0, r0)
sendmsg$nl_generic(r1, &(0x7f0000000480)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000006c0)={0x24, 0x1a, 0xc21, 0x0, 0x0, {0x2}, [@typed={0x8, 0x0, 0x0, 0x0, @u32}, @typed={0x8, 0x10, 0x0, 0x0, @ipv4=@multicast1}]}, 0x24}}, 0x0)