r0 = socket$netlink(0x10, 0x3, 0x0)
sendmsg$nl_generic(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000080)={0x34, 0x18, 0x901, 0x0, 0x0, {0xa}, [@typed={0x8, 0x0, 0x0, 0x0, @pid}, @nested={0x18, 0x9, 0x0, 0x1, [@typed={0x14, 0x0, 0x0, 0x0, @ipv6=@mcast1}]}]}, 0x34}}, 0x0)