Here are the data structures with brief descriptions:

_download_ctx_s
chunk_position_s
chunk_s
metachunk_s
oio_sds_dl_dst_s
oio_sds_dl_range_s
oio_sds_dl_src_s
oio_sds_list_item_s
oio_sds_list_listener_s
oio_sds_list_param_s
oio_sds_s
oio_sds_ul_dst_s
oio_sds_ul_s
oio_sds_ul_src_s
oio_sds_usage_s
oio_url_s