libqmi-glib

[Bjørn Mork]

Aleksander Morgado <aleksander at lanedo.com> writes:

> Hey Thomas, Dan & everyone else,
>
> I've recently been playing quite some time with QMI devices, and
> analyzing Chromium's libqmi. I also started libqmi-glib, what I
> thought would be just a small layer on top of Chromium's libqmi's
> generic implementation, providing a GLib/GIO like interface. This
> small layer ended up being quite a rewrite of Chromium's libqmi,
> fixing some things and taking some other approaches sometimes.
[..]
> Comments, thoughts?

The code looks like a good start to me, but I'm a bit worried about the
amount of duplicated work here. Maybe I shouldn't as a long as I'm not
doing any of it, but it still feels wrong...  

Anyway.  One initial comment regarding the QMI_DMS_MESSAGE_GET_IDS
parsing (I believe this has been brought up before): The parsing
currently fails on all (European) MDM9200 based devices I've got:


bjorn at nemi:/usr/local/src/git/libqmi-glib$ cli/qmicli --device=/dev/cdc-wdm0 --verbose --dms-get-ids
[23 Apr 2012, 14:00:46] [Debug] Checking version info...
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0] QMI Device supports 14 services:
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    ctl (1.5)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    wds (1.12)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    dms (1.6)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    nas (1.8)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    qos (1.3)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    wms (1.3)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    pds (1.10)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    auth (1.1)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    voice (2.1)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    cat2 (2.0)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    uim (1.4)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    pbm (1.4)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    sar (1.0)
[23 Apr 2012, 14:00:46] [Debug] [/dev/cdc-wdm0]    rms (1.0)
[23 Apr 2012, 14:00:46] [Debug] Asynchronously getting IDs...
error: couldn't get IDs: Getting IDs reply parsing failed: TLV not found
bjorn at nemi:/usr/local/src/git/libqmi-glib$ cli/qmicli --device=/dev/cdc-wdm2 --verbose --dms-get-ids
[23 Apr 2012, 14:00:51] [Debug] Checking version info...
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2] QMI Device supports 13 services:
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    ctl (1.5)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    wds (1.12)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    dms (1.6)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    nas (1.8)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    qos (1.3)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    wms (1.3)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    pds (1.10)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    auth (1.1)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    voice (2.1)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    cat2 (2.0)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    uim (1.4)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    pbm (1.4)
[23 Apr 2012, 14:00:51] [Debug] [/dev/cdc-wdm2]    cat (0.0)
[23 Apr 2012, 14:00:51] [Debug] Asynchronously getting IDs...
error: couldn't get IDs: Getting IDs reply parsing failed: TLV not found


Both of these return TLV 0x10 == '0' and TLV 0x11 == IMEI.  Slightly
obfuscated output:

Sierra Wireless MC7710 in QMI mode:

[Mon Apr 23 14:01:50 2012] read 42 bytes from /dev/cdc-wdm0
01 29 00 80 02 07 02 07 00 25 00 1d 00 02 04 00 00 00 00 00 10 01 00 30 11 0f 00 33 35 38 31 37 38 30 34 30 30 31 32 33 34 35 
<= QMUX Header:
<=   len:    0x0029
<=   sender: 0x80
<=   svc:    0x02
<=   cid:    0x07

<= QMI Header:
<=   Flags:  0x02
<=   TXN:    0x0007
<=   Cmd:    0x0025
<=   Size:   0x001d
<= [0x02] ( 4) 00 00 00 00      SUCCESS - QMI_ERR_NONE
<= [0x10] ( 1) 30       0
<= [0x11] (15) 33 35 38 31 37 38 30 34 30 30 31 32 33 34 35     358178040012345


Huawei E392:

[Mon Apr 23 13:56:36 2012] read 42 bytes from /dev/cdc-wdm2
01 29 00 80 02 08 02 07 00 25 00 1d 00 02 04 00 00 00 00 00 10 01 00 30 11 0f 00 38 36 30 39 39 39 30 30 30 30 31 32 33 34 35
<= QMUX Header:
<=   len:    0x0029
<=   sender: 0x80
<=   svc:    0x02
<=   cid:    0x08

<= QMI Header:
<=   Flags:  0x02
<=   TXN:    0x0007
<=   Cmd:    0x0025
<=   Size:   0x001d
<= [0x02] ( 4) 00 00 00 00      SUCCESS - QMI_ERR_NONE
<= [0x10] ( 1) 30       0
<= [0x11] (15) 38 36 30 39 39 39 30 30 30 30 31 32 33 34 35     860999000012345


So the parsing fails because there is no MEID TLV.  The ESN also looks
quite useless, but at least it's present so parsing should work.


Bjørn