r0 = socket$inet6_udplite(0xa, 0x2, 0x88) setsockopt$inet6_group_source_req(r0, 0x29, 0x1b, &(0x7f0000000000)={0x0, {{0xa, 0x0, 0x0, @mcast1={0xff, 0x5}}}, {{0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @initdev={0xac, 0x1e, 0x0, 0x0}}}}}, 0x108)