r0 = socket$inet6_udplite(0xa, 0x2, 0x88)
setsockopt$inet6_group_source_req(r0, 0x29, 0x17, &(0x7f0000000500)={0x7f, {{0xa, 0x0, 0x0, @mcast1}}, {{0xa, 0x0, 0x0, @empty}}}, 0x108)