Bluetooth OTS: decoding the directory list object

Question

Hi!

I'm developing an application that uses the bluetooth object transfer service.

I can transfer the directory list object (using OTS_OBJ_ID_DIR_LIST) from the server to the client, but parsing it with bt_ots_client_decode_dirlisting() fails to complete for the final record with return code -22.

Does anyone have a working sample that uses this function? I don't see it used in any samples provided in NCS or zephyr.

This is my shell command function and bt_ots_client_dirlisting_cb callback function.

// *****************************************************************************
static int dirlisting_cb_handler(struct bt_ots_obj_metadata *meta)
{
    LOG_INF("%s", __func__);

    if(!meta)
    {
        return BT_OTS_STOP;
    }

    memcpy(&dirlist[dirlist_obj_count], meta,
           sizeof(dirlist[dirlist_obj_count]));

    bt_ots_metadata_display(meta, 1);

    dirlist_obj_count++;
    return BT_OTS_CONTINUE;
}


// *****************************************************************************
static int bv_ble_ots_shell_decode(const struct shell *sh, size_t argc,
                                   char **argv)
{
    int rc;

    memset(dirlist, 0, sizeof(dirlist));
    dirlist_obj_count = 0;

    rc = bt_ots_client_decode_dirlisting(object.data, object.size.cur,
                                         dirlisting_cb_handler);
    if(rc < 0)
    {
        LOG_ERR("bt_ots_client_decode_dirlisting failed, rc %i", rc);
        return rc;
    }

    return 0;
}

This is the output that I get with 4 test files.

[00:00:47.633,117] <inf> bv_ble_ots_client: dirlisting_cb_handler
[00:00:47.633,148] <inf> bt_otc: --- Displaying 1 metadata records ---
[00:00:47.633,239] <inf> bt_otc: Object ID: 0x0x000000000000
[00:00:47.633,270] <inf> bt_otc: Object name: Directory
[00:00:47.633,270] <inf> bt_otc: Object Current Size: 145
[00:00:47.633,270] <inf> bt_otc: Object Allocate Size: 274797
[00:00:47.633,300] <inf> bt_otc: Properties:0x4
[00:00:47.633,300] <inf> bt_otc:  - read permitted
[00:00:47.633,331] <inf> bv_ble_ots_client: dirlisting_cb_handler
[00:00:47.633,361] <inf> bt_otc: --- Displaying 1 metadata records ---
[00:00:47.633,422] <inf> bt_otc: Object ID: 0x0x000000000100
[00:00:47.633,453] <inf> bt_otc: Object name: test5.txt
[00:00:47.633,483] <inf> bt_otc: Object Current Size: 2128
[00:00:47.633,483] <inf> bt_otc: Object Allocate Size: 274797
[00:00:47.633,483] <inf> bt_otc: Properties:0x4d
[00:00:47.633,514] <inf> bt_otc:  - delete permitted
[00:00:47.633,514] <inf> bt_otc:  - patch permitted
[00:00:47.633,514] <inf> bt_otc:  - read permitted
[00:00:47.633,514] <inf> bt_otc:  - write permitted
[00:00:47.633,544] <inf> bv_ble_ots_client: dirlisting_cb_handler
[00:00:47.633,575] <inf> bt_otc: --- Displaying 1 metadata records ---
[00:00:47.633,666] <inf> bt_otc: Object ID: 0x0x000000000101
[00:00:47.633,697] <inf> bt_otc: Object name: test6.txt
[00:00:47.633,697] <inf> bt_otc: Object Current Size: 1872
[00:00:47.633,697] <inf> bt_otc: Object Allocate Size: 274797
[00:00:47.633,728] <inf> bt_otc: Properties:0x4d
[00:00:47.633,728] <inf> bt_otc:  - delete permitted
[00:00:47.633,728] <inf> bt_otc:  - patch permitted
[00:00:47.633,728] <inf> bt_otc:  - read permitted
[00:00:47.633,758] <inf> bt_otc:  - write permitted
[00:00:47.633,758] <inf> bv_ble_ots_client: dirlisting_cb_handler
[00:00:47.633,789] <inf> bt_otc: --- Displaying 1 metadata records ---
[00:00:47.633,880] <inf> bt_otc: Object ID: 0x0x000000000102
[00:00:47.633,911] <inf> bt_otc: Object name: test7.txt
[00:00:47.633,911] <inf> bt_otc: Object Current Size: 1616
[00:00:47.633,911] <inf> bt_otc: Object Allocate Size: 274797
[00:00:47.633,941] <inf> bt_otc: Properties:0x4d
[00:00:47.633,941] <inf> bt_otc:  - delete permitted
[00:00:47.633,941] <inf> bt_otc:  - patch permitted
[00:00:47.633,972] <inf> bt_otc:  - read permitted
[00:00:47.633,972] <inf> bt_otc:  - write permitted
[00:00:47.633,972] <wrn> bt_otc: incorrect DirListing record length 29, longer than remaining size 27
[00:00:47.633,972] <wrn> bt_otc: DirListing, record 5 invalid
[00:00:47.634,002] <err> bv_ble_ots_client: bt_ots_client_decode_dirlisting failed, rc -22

Any help would be appreciated!

thanks,

Chao