<div dir="ltr">Bjorn, I've been trying to get output that looks like your's but I can't seem to get it yet.<div><br></div><div>Anyway, because I can't successfully get 'usbmon' to work, I started heading down a different path.</div>
<div><br></div><div>I figured out how to send AT commands to the 340u via osx.</div><div><br></div><div>Please see below:</div><div><br></div><div><div>ati</div><div>Manufacturer: Sierra Wireless, Incorporated</div><div>
Model: AirCard 340U</div>
<div>Revision: SWI9X15C_01.05.11.52 r16619 ntgrbc-fwbuild1 2013/06/28 19:04:08</div><div>IMEI: 013323000120510</div><div>IMEI SV: 7</div><div>FSN: EV310101160610</div><div>+GCAP: +CGSM</div><div><br></div><div><br></div>
<div>
OK</div></div><div><br></div><div>I also started looking into QMI vs MBIM:</div><div><br></div><div><div>AT!UDUSBCOMP=?</div><div>0 - reserved NOT SUPPORTED</div><div>1 - reserved NOT SUPPORTED</div>
<div>2 - reserved NOT SUPPORTED</div><div>3 - reserved NOT SUPPORTED</div><div>4 - reserved NOT SUPPORTED</div>
<div>5 - reserved NOT SUPPORTED</div><div>6 - DM NMEA AT QMI SUPPORTED</div><div>7 - DM NMEA AT RMNET1 RMNET2 RMNET3 SUPPORTED</div><div>8 - DM NMEA AT MBIM SUPPORTED</div>
<div>9 - MBIM SUPPORTED</div><div>10 - NMEA MBIM SUPPORTED</div><div>11 - DM MBIM SUPPORTED</div><div>12 - DM NMEA MBIM SUPPORTED</div>
<div>13 - Config1: comp6 Config2: comp8 NOT SUPPORTED</div><div>14 - Config1: comp6 Config2: comp9 SUPPORTED</div><div>15 - Config1: comp6 Config2: comp10 NOT SUPPORTED</div><div>
16 - Config1: comp6 Config2: comp11 NOT SUPPORTED</div><div>17 - Config1: comp6 Config2: comp12 NOT SUPPORTED</div><div>18 - Config1: comp7 Config2: comp8 NOT SUPPORTED</div><div>
19 - Config1: comp7 Config2: comp9 SUPPORTED</div><div>20 - Config1: comp7 Config2: comp10 NOT SUPPORTED</div><div>21 - Config1: comp7 Config2: comp11 NOT SUPPORTED</div><div>22 - Config1: comp7 Config2: comp12 NOT SUPPORTED</div>
</div><div><br></div><div><div>AT!UDUSBCOMP?</div><div>!UDUSBCOMP: 6</div></div><div><br></div><div><div>AT!UDPID?</div><div>!UDPID: </div><div>APP : 9051</div><div>BOOT: 9051</div></div><div><br></div><div><div>AT!UDPID=?</div>
<div>APP BOOT</div><div>9041, 9040</div><div>9051, 9051</div><div>9053, 9053</div><div>9054, 9054</div><div>9056, 9056</div><div>68A2, 68A2</div><div>68B1, 68B0</div></div><div><br></div><div>Should I start playing with !UDPID and !UDUSBCOMP? What are your values?</div>
<div><br></div><div>The reason I started doing this is because David wrote that my bNumConfigurations looks different. Maybe this is why I am unable to connect through the raspberry pi. </div><div>I am not able to perform the AT commands through linux for some reason. Let me know if there are any other AT commands I should run.</div>
<div><br></div><div>Thanks again.</div><div><br></div><div>Noah</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Apr 30, 2014 at 12:30 AM, Bjørn Mork <span dir="ltr"><<a href="mailto:bjorn@mork.no" target="_blank">bjorn@mork.no</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">Noah Taber <<a href="mailto:noahtaber@gmail.com">noahtaber@gmail.com</a>> writes:<br>
<br>
> I'm still trying to figure out usbmon. I can't get it to spit out readable<br>
> information.<br>
><br>
> I did have a minor break through though. I used a pepwave router to remove<br>
> the linux patch described on the netgear website. To my understanding,<br>
> this takes the 340u out of direct ip mode. The qmi-network command now<br>
> works correctly. It even issues a Packet data handle. I am able to start<br>
> and stop a data connection using the qmi-network and the display on the<br>
> 340u changes accordingly.<br>
<br>
</div>That's good. Then we know there is nothing unexpected going on with the<br>
modem.<br>
<div class=""><br>
> The problem is, is that I cannot get the device to retrieve an IP using<br>
> dhclient. I'm still dead in the water.<br>
<br>
</div>Still sounds like there is an issue with bulk data transmission. The<br>
serial port on USB interface #3 (usually mapped to /dev/ttyUSB2) does<br>
still not respond to AT commands either?<br>
<br>
> Hints?<br>
<br>
All of this is of course much simpler with tshark or wireshark, which<br>
will dissect the data for you. But figuring out usbmon output is not<br>
too difficult, and it's availiable on any Linux platform with USB no<br>
matter how simple and embedded it is..<br>
<br>
<br>
A basic usbmon example:<br>
<br>
1) check which bus the modem is on and try to make sure it's the only<br>
device on that bus (to avoid confusion):<br>
<br>
bjorn@nemi:~$ lsusb<br>
Bus 005 Device 011: ID 1199:68a2 Sierra Wireless, Inc.<br>
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub<br>
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub<br>
Bus 007 Device 002: ID 8087:07dc Intel Corp.<br>
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub<br>
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub<br>
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub<br>
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub<br>
Bus 003 Device 003: ID 0a5c:2145 Broadcom Corp. BCM2045B (BDC-2.1) [Bluetooth Controller]<br>
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub<br>
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub<br>
<br>
So my modem is on bus #5 and is the only device there. Good<br>
<br>
<br>
2) load the module and mount debugfs (if not already done):<br>
<br>
nemi:/home/bjorn# modprobe usbmon<br>
nemi:/home/bjorn# mount -t debugfs none /sys/kernel/debug<br>
mount: none already mounted or /sys/kernel/debug busy<br>
mount: according to mtab, debug is already mounted on /sys/kernel/debug<br>
<br>
Good<br>
<br>
<br>
3) select the correct file to look at:<br>
<br>
nemi:/home/bjorn# ls -l /sys/kernel/debug/usb/usbmon/<br>
total 0<br>
-rw------- 1 root root 0 Apr 30 11:10 0s<br>
-rw------- 1 root root 0 Apr 30 11:10 0u<br>
-rw------- 1 root root 0 Apr 30 11:10 1s<br>
-rw------- 1 root root 0 Apr 30 11:10 1t<br>
-rw------- 1 root root 0 Apr 30 11:10 1u<br>
-rw------- 1 root root 0 Apr 30 11:10 2s<br>
-rw------- 1 root root 0 Apr 30 11:10 2t<br>
-rw------- 1 root root 0 Apr 30 11:10 2u<br>
-rw------- 1 root root 0 Apr 30 11:10 3s<br>
-rw------- 1 root root 0 Apr 30 11:10 3t<br>
-rw------- 1 root root 0 Apr 30 11:10 3u<br>
-rw------- 1 root root 0 Apr 30 11:10 4s<br>
-rw------- 1 root root 0 Apr 30 11:10 4t<br>
-rw------- 1 root root 0 Apr 30 11:10 4u<br>
-rw------- 1 root root 0 Apr 30 11:10 5s<br>
-rw------- 1 root root 0 Apr 30 11:10 5t<br>
-rw------- 1 root root 0 Apr 30 11:10 5u<br>
-rw------- 1 root root 0 Apr 30 11:10 6s<br>
-rw------- 1 root root 0 Apr 30 11:10 6t<br>
-rw------- 1 root root 0 Apr 30 11:10 6u<br>
-rw------- 1 root root 0 Apr 30 11:10 7s<br>
-rw------- 1 root root 0 Apr 30 11:10 7t<br>
-rw------- 1 root root 0 Apr 30 11:10 7u<br>
-rw------- 1 root root 0 Apr 30 11:10 8s<br>
-rw------- 1 root root 0 Apr 30 11:10 8t<br>
-rw------- 1 root root 0 Apr 30 11:10 8u<br>
<br>
<br>
We were interested in bus #5. 't/u' signifies different API variants.<br>
'u' is the newest and contains a superset of the 't' variant. The 's'<br>
files are just statistics dumps.<br>
<br>
So we choose the /sys/kernel/debug/usb/usbmon/5u file, and start reading<br>
from that in a terminal dedicated to this (you can of course dump to<br>
file or netcat or whatever instead). I like to use tee to both capture<br>
the result an see it scrolling by:<br>
<br>
nemi:/home/bjorn# cat /sys/kernel/debug/usb/usbmon/5u |tee /tmp/5u.log<br>
<br>
<br>
4) start the network connection:<br>
<br>
bjorn@nemi:~$ qmicli -d /dev/cdc-wdm0 --wds-start-network=telenor --client-no-release-cid<br>
[/dev/cdc-wdm0] Network started<br>
Packet data handle: '41223440'<br>
<div class="">[/dev/cdc-wdm0] Client ID not released:<br>
Service: 'wds'<br>
</div> CID: '5'<br>
<br>
<br>
<br>
5) observe the results:<br>
<br>
<br>
ffff880231416ac0 277634302 S Ci:5:001:0 s a3 00 0000 0001 0004 4 <<br>
ffff880231416ac0 277634389 C Ci:5:001:0 0 4 = 00010000<br>
ffff880231416ac0 277634456 S Ci:5:001:0 s a3 00 0000 0002 0004 4 <<br>
ffff880231416ac0 277634496 C Ci:5:001:0 0 4 = 00010000<br>
ffff880231416ac0 277634552 S Ci:5:001:0 s a3 00 0000 0003 0004 4 <<br>
ffff880231416ac0 277634591 C Ci:5:001:0 0 4 = 00010000<br>
ffff880231416ac0 277634646 S Ci:5:001:0 s a3 00 0000 0004 0004 4 <<br>
ffff880231416ac0 277634696 C Ci:5:001:0 0 4 = 07050000<br>
ffff880231416ac0 277634753 S Ci:5:001:0 s a3 00 0000 0005 0004 4 <<br>
ffff880231416ac0 277634793 C Ci:5:001:0 0 4 = 00010000<br>
ffff880231416ac0 277634849 S Ci:5:001:0 s a3 00 0000 0006 0004 4 <<br>
ffff880231416ac0 277634887 C Ci:5:001:0 0 4 = 00010000<br>
ffff880230812f40 277634913 S Ii:5:001:1 -115:2048 4 <<br>
ffff880231416ac0 277635029 S Ci:5:001:0 s a3 00 0000 0004 0004 4 <<br>
ffff880231416ac0 277635077 C Ci:5:001:0 0 4 = 07050000<br>
ffff880231416ac0 277635129 S Co:5:001:0 s 23 01 0002 0004 0000 0<br>
ffff880231416ac0 277635171 C Co:5:001:0 0 0<br>
ffff880231416940 277666311 S Ci:5:001:0 s a3 00 0000 0004 0004 4 <<br>
ffff880231416940 277666699 C Ci:5:001:0 0 4 = 03050400<br>
ffff880231416940 277682287 S Co:5:001:0 s 23 01 0012 0004 0000 0<br>
ffff880231416940 277682354 C Co:5:001:0 0 0<br>
ffff880231416940 277682417 S Ci:5:011:0 s 80 00 0000 0000 0002 2 <<br>
ffff880231416940 277682954 C Ci:5:011:0 0 2 = 0100<br>
ffff880216087e80 277683408 S Ii:5:011:5 -115:16 64 <<br>
ffff8800a87b1940 277684334 S Co:5:011:0 s 21 00 0000 0008 0010 16 = 010f0000 00000001 22000400 01010001<br>
ffff8800a87b1940 277686627 C Co:5:011:0 0 16 ><br>
ffff880216087e80 277689734 C Ii:5:011:5 0:16 8 = a1010000 08000000<br>
ffff8800831f5280 277689755 S Ci:5:011:0 s a1 01 0000 0008 1000 4096 <<br>
ffff880216087e80 277689779 S Ii:5:011:5 -115:16 64 <<br>
ffff8800831f5280 277690936 C Ci:5:011:0 0 24 = 01170080 00000101 22000c00 02040000 00000001 02000105<br>
ffff8800a87b1940 277691585 S Co:5:011:0 s 21 00 0000 0008 0017 23 = 01160000 01050001 0020000a 00140700 74656c65 6e6f72<br>
ffff8800a87b1940 277692355 C Co:5:011:0 0 23 ><br>
ffff880216087e80 278043798 C Ii:5:011:5 0:16 8 = a1010000 08000000<br>
ffff8800831f5280 278043824 S Ci:5:011:0 s a1 01 0000 0008 1000 4096 <<br>
ffff880216087e80 278043854 S Ii:5:011:5 -115:16 64 <<br>
ffff8800831f5280 278044315 C Ci:5:011:0 0 27 = 011a0080 01050201 0020000e 00020400 00000000 01040010 057502<br>
ffff880216087e80 278047341 C Ii:5:011:5 -2:16 0<br>
ffff8802314164c0 280694523 S Co:5:001:0 s 23 03 0002 0004 0000 0<br>
ffff8802314164c0 280694612 C Co:5:001:0 0 0<br>
ffff880230812f40 280710439 C Ii:5:001:1 -2:2048 0<br>
<br>
<br>
6) run the dhcp client<br>
<br>
nemi:/home/bjorn# dhclient -d -4 wwan0<br>
<div class="">Internet Systems Consortium DHCP Client 4.2.2<br>
Copyright 2004-2011 Internet Systems Consortium.<br>
All rights reserved.<br>
For info, please visit <a href="https://www.isc.org/software/dhcp/" target="_blank">https://www.isc.org/software/dhcp/</a><br>
<br>
</div>Listening on LPF/wwan0/c6:b0:7b:58:94:9d<br>
Sending on LPF/wwan0/c6:b0:7b:58:94:9d<br>
Sending on Socket/fallback<br>
DHCPDISCOVER on wwan0 to 255.255.255.255 port 67 interval 8<br>
DHCPREQUEST on wwan0 to 255.255.255.255 port 67<br>
DHCPOFFER from 176.75.154.234<br>
DHCPACK from 176.75.154.234<br>
bound to 176.75.154.233 -- renewal in 3413 seconds.<br>
<br>
<br>
7) observe the results<br>
<br>
<br>
ffff880216053ac0 338734248 S Ci:5:001:0 s a3 00 0000 0001 0004 4 <<br>
ffff880216053ac0 338734672 C Ci:5:001:0 0 4 = 00010000<br>
ffff880216053ac0 338735384 S Ci:5:001:0 s a3 00 0000 0002 0004 4 <<br>
ffff880216053ac0 338736267 C Ci:5:001:0 0 4 = 00010000<br>
ffff880216053ac0 338736951 S Ci:5:001:0 s a3 00 0000 0003 0004 4 <<br>
ffff880216053ac0 338737091 C Ci:5:001:0 0 4 = 00010000<br>
ffff880216053ac0 338737228 S Ci:5:001:0 s a3 00 0000 0004 0004 4 <<br>
ffff880216053ac0 338737663 C Ci:5:001:0 0 4 = 07050000<br>
ffff880216053ac0 338737800 S Ci:5:001:0 s a3 00 0000 0005 0004 4 <<br>
ffff880216053ac0 338737932 C Ci:5:001:0 0 4 = 00010000<br>
ffff880216053ac0 338738059 S Ci:5:001:0 s a3 00 0000 0006 0004 4 <<br>
ffff880216053ac0 338738227 C Ci:5:001:0 0 4 = 00010000<br>
ffff880230812f40 338738432 S Ii:5:001:1 -115:2048 4 <<br>
ffff880216053ac0 338738742 S Ci:5:001:0 s a3 00 0000 0004 0004 4 <<br>
ffff880216053ac0 338738866 C Ci:5:001:0 0 4 = 07050000<br>
ffff880216053ac0 338738986 S Co:5:001:0 s 23 01 0002 0004 0000 0<br>
ffff880216053ac0 338739110 C Co:5:001:0 0 0<br>
ffff88008319ec40 338770290 S Ci:5:001:0 s a3 00 0000 0004 0004 4 <<br>
ffff88008319ec40 338770431 C Ci:5:001:0 0 4 = 03050400<br>
ffff880216053ac0 338786288 S Co:5:001:0 s 23 01 0012 0004 0000 0<br>
ffff880216053ac0 338786364 C Co:5:001:0 0 0<br>
ffff880216053ac0 338786434 S Ci:5:011:0 s 80 00 0000 0000 0002 2 <<br>
ffff880216053ac0 338786938 C Ci:5:011:0 0 2 = 0100<br>
ffff880216053ac0 338787573 S Bi:5:011:6 -115 1514 <<br>
ffff8800a862ac40 338787889 S Bi:5:011:6 -115 1514 <<br>
ffff88022f81c280 338787907 S Bi:5:011:6 -115 1514 <<br>
ffff8800a862a580 338787924 S Bi:5:011:6 -115 1514 <<br>
ffff88022f0537c0 338787941 S Bi:5:011:6 -115 1514 <<br>
ffff88021edfca00 338787958 S Bi:5:011:6 -115 1514 <<br>
ffff88021edfc100 338787975 S Bi:5:011:6 -115 1514 <<br>
ffff8802317c6700 338787991 S Bi:5:011:6 -115 1514 <<br>
ffff88022f37ee80 338788009 S Bi:5:011:6 -115 1514 <<br>
ffff88022f37ef40 338788025 S Bi:5:011:6 -115 1514 <<br>
ffff880229ec6580 338788045 S Bi:5:011:6 -115 1514 <<br>
ffff880229ec6040 338788072 S Bi:5:011:6 -115 1514 <<br>
ffff8802160537c0 338788095 S Bi:5:011:6 -115 1514 <<br>
ffff880216053880 338788111 S Bi:5:011:6 -115 1514 <<br>
ffff880216053f40 338788135 S Bi:5:011:6 -115 1514 <<br>
ffff880216053100 338788234 S Bi:5:011:6 -115 1514 <<br>
ffff880216053580 338788251 S Bi:5:011:6 -115 1514 <<br>
ffff880216053400 338788268 S Bi:5:011:6 -115 1514 <<br>
ffff880216053e80 338788284 S Bi:5:011:6 -115 1514 <<br>
ffff88021ef8d700 338788300 S Bi:5:011:6 -115 1514 <<br>
ffff8801c0094280 338788320 S Bi:5:011:6 -115 1514 <<br>
ffff8801f6f33280 338788337 S Bi:5:011:6 -115 1514 <<br>
ffff88021ef8dc40 338788354 S Bi:5:011:6 -115 1514 <<br>
ffff88006784d940 338788371 S Bi:5:011:6 -115 1514 <<br>
ffff88021607f880 338788387 S Bi:5:011:6 -115 1514 <<br>
ffff88021607f100 338788404 S Bi:5:011:6 -115 1514 <<br>
ffff88021607f4c0 338788420 S Bi:5:011:6 -115 1514 <<br>
ffff880216053940 338788437 S Bi:5:011:6 -115 1514 <<br>
ffff88022f81c7c0 338788460 S Bi:5:011:6 -115 1514 <<br>
ffff88022f81c640 338788476 S Bi:5:011:6 -115 1514 <<br>
ffff88021607fdc0 338788496 S Bi:5:011:6 -115 1514 <<br>
ffff8800a84d6280 338788513 S Bi:5:011:6 -115 1514 <<br>
ffff8800a8555280 338788529 S Bi:5:011:6 -115 1514 <<br>
ffff88021ef93100 338788547 S Bi:5:011:6 -115 1514 <<br>
ffff8801f6f33d00 338788563 S Bi:5:011:6 -115 1514 <<br>
ffff880231256ac0 338788580 S Bi:5:011:6 -115 1514 <<br>
ffff8800a866e640 338788597 S Bi:5:011:6 -115 1514 <<br>
ffff8800830bbc40 338788613 S Bi:5:011:6 -115 1514 <<br>
ffff8801f63cb040 338788642 S Bi:5:011:6 -115 1514 <<br>
ffff8801f63cbc40 338788659 S Bi:5:011:6 -115 1514 <<br>
ffff8800a862a340 338788686 S Bi:5:011:6 -115 1514 <<br>
ffff8801f6f33700 338788703 S Bi:5:011:6 -115 1514 <<br>
ffff8801fd363400 338788719 S Bi:5:011:6 -115 1514 <<br>
ffff8800831f5100 338788735 S Bi:5:011:6 -115 1514 <<br>
ffff8800a862ad00 338788751 S Bi:5:011:6 -115 1514 <<br>
ffff8800a862ab80 338788773 S Bi:5:011:6 -115 1514 <<br>
ffff8801fd22e880 338788790 S Bi:5:011:6 -115 1514 <<br>
ffff8801f6343880 338788806 S Bi:5:011:6 -115 1514 <<br>
ffff88008319ef40 338788823 S Bi:5:011:6 -115 1514 <<br>
ffff8800830bbb80 338788840 S Bi:5:011:6 -115 1514 <<br>
ffff8801f63cb400 338788865 S Bi:5:011:6 -115 1514 <<br>
ffff8800a8555580 338788882 S Bi:5:011:6 -115 1514 <<br>
ffff88020b294a00 338788899 S Bi:5:011:6 -115 1514 <<br>
ffff8801f6343100 338788915 S Bi:5:011:6 -115 1514 <<br>
ffff8801f6343400 338788931 S Bi:5:011:6 -115 1514 <<br>
ffff8800a8555c40 338788948 S Bi:5:011:6 -115 1514 <<br>
ffff88007fd89580 338788965 S Bi:5:011:6 -115 1514 <<br>
ffff8800a85554c0 338788985 S Bi:5:011:6 -115 1514 <<br>
ffff8802160ccf40 338789002 S Bi:5:011:6 -115 1514 <<br>
ffff8802160cce80 338789019 S Bi:5:011:6 -115 1514 <<br>
ffff8800a862a1c0 338794218 S Bo:5:011:4 -115 90 = 33330000 0016c6b0 7b58949d 86dd6000 00000024 00010000 00000000 00000000<br>
ffff8800a862a1c0 338794545 C Bo:5:011:4 0 90 ><br>
ffff8802072d4f40 338819689 S Bo:5:011:4 -115 342 = ffffffff ffffc6b0 7b58949d 08004510 01480000 00008011 39960000 0000ffff<br>
ffff8802072d4f40 338820066 C Bo:5:011:4 0 342 ><br>
ffff880216053ac0 338830335 C Bi:5:011:6 0 320 = c6b07b58 949d0250 f3000000 08004500 01320000 0000ff11 2450b04b 9aeab04b<br>
ffff880216053ac0 338830363 S Bi:5:011:6 -115 1514 <<br>
ffff8802072d4f40 338831167 S Bo:5:011:4 -115 342 = ffffffff ffffc6b0 7b58949d 08004510 01480000 00008011 39960000 0000ffff<br>
ffff8802072d4f40 338831303 C Bo:5:011:4 0 342 ><br>
ffff8800a862ac40 338833100 C Bi:5:011:6 0 320 = c6b07b58 949d0250 f3000000 08004500 01320001 0000ff11 244fb04b 9aeab04b<br>
ffff8800a862ac40 338833126 S Bi:5:011:6 -115 1514 <<br>
ffff880231256040 339046327 S Bo:5:011:4 -115 90 = 33330000 0016c6b0 7b58949d 86dd6000 00000024 00010000 00000000 00000000<br>
ffff880231256040 339046447 C Bo:5:011:4 0 90 ><br>
ffff880231256040 339054391 S Bo:5:011:4 -115 78 = 3333ff58 949dc6b0 7b58949d 86dd6000 00000018 3aff0000 00000000 00000000<br>
ffff880231256040 339054845 C Bo:5:011:4 0 78 ><br>
ffff880231256040 340054436 S Bo:5:011:4 -115 90 = 33330000 0016c6b0 7b58949d 86dd6000 00000024 0001fe80 00000000 0000c4b0<br>
ffff88007fd894c0 340054600 S Bo:5:011:4 -115 70 = 33330000 0002c6b0 7b58949d 86dd6000 00000010 3afffe80 00000000 0000c4b0<br>
ffff880231256040 340054632 C Bo:5:011:4 0 90 ><br>
ffff88007fd894c0 340054683 C Bo:5:011:4 0 70 ><br>
ffff88008319ec40 340330363 S Bo:5:011:4 -115 90 = 33330000 0016c6b0 7b58949d 86dd6000 00000024 0001fe80 00000000 0000c4b0<br>
ffff88008319ec40 340330711 C Bo:5:011:4 0 90 ><br>
ffff88022f81c280 342710597 C Bi:5:011:6 -104 0<br>
ffff8800a862a580 342710622 C Bi:5:011:6 -104 0<br>
ffff88022f0537c0 342710635 C Bi:5:011:6 -104 0<br>
ffff88021edfca00 342710661 C Bi:5:011:6 -104 0<br>
ffff88021edfc100 342710673 C Bi:5:011:6 -104 0<br>
ffff8802317c6700 342710686 C Bi:5:011:6 -104 0<br>
ffff88022f37ee80 342710698 C Bi:5:011:6 -104 0<br>
ffff88022f37ef40 342710709 C Bi:5:011:6 -104 0<br>
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ffff8801f6343400 348252638 S Bi:5:011:6 -115 1514 <<br>
ffff8800a8555c40 348252654 S Bi:5:011:6 -115 1514 <<br>
ffff88007fd89580 348252669 S Bi:5:011:6 -115 1514 <<br>
ffff8800a85554c0 348252688 S Bi:5:011:6 -115 1514 <<br>
ffff8802160ccf40 348252706 S Bi:5:011:6 -115 1514 <<br>
ffff88008319ef40 348252722 S Bi:5:011:6 -115 1514 <<br>
ffff8802160cce80 348252740 S Bi:5:011:6 -115 1514 <<br>
ffff880216053ac0 348252756 S Bi:5:011:6 -115 1514 <<br>
ffff880224818dc0 348252772 S Bi:5:011:6 -115 1514 <<br>
ffff8800a862ac40 348252790 S Bi:5:011:6 -115 1514 <<br>
ffff88022f0537c0 350715023 C Bi:5:011:6 -104 0<br>
ffff88021edfca00 350715077 C Bi:5:011:6 -104 0<br>
ffff88021edfc100 350715095 C Bi:5:011:6 -104 0<br>
ffff8802317c6700 350715113 C Bi:5:011:6 -104 0<br>
ffff8800a862a580 350715126 C Bi:5:011:6 -104 0<br>
ffff88022f37ee80 350715139 C Bi:5:011:6 -104 0<br>
ffff88022f37ef40 350715151 C Bi:5:011:6 -104 0<br>
ffff880229ec6580 350715167 C Bi:5:011:6 -104 0<br>
ffff880229ec6040 350715179 C Bi:5:011:6 -104 0<br>
ffff8802160537c0 350715190 C Bi:5:011:6 -104 0<br>
ffff880216053880 350715201 C Bi:5:011:6 -104 0<br>
ffff880216053f40 350715212 C Bi:5:011:6 -104 0<br>
ffff880216053100 350715223 C Bi:5:011:6 -104 0<br>
ffff880216053580 350715239 C Bi:5:011:6 -104 0<br>
ffff880216053400 350715250 C Bi:5:011:6 -104 0<br>
ffff880216053e80 350715261 C Bi:5:011:6 -104 0<br>
ffff88021ef8d700 350715272 C Bi:5:011:6 -104 0<br>
ffff8801c0094280 350715288 C Bi:5:011:6 -104 0<br>
ffff8801f6f33280 350715299 C Bi:5:011:6 -104 0<br>
ffff88021ef8dc40 350715311 C Bi:5:011:6 -104 0<br>
ffff88006784d940 350715322 C Bi:5:011:6 -104 0<br>
ffff88021607f880 350715334 C Bi:5:011:6 -104 0<br>
ffff88021607f100 350715345 C Bi:5:011:6 -104 0<br>
ffff88021607f4c0 350715356 C Bi:5:011:6 -104 0<br>
ffff880216053940 350715367 C Bi:5:011:6 -104 0<br>
ffff88022f81c7c0 350715379 C Bi:5:011:6 -104 0<br>
ffff88022f81c640 350715390 C Bi:5:011:6 -104 0<br>
ffff88021607fdc0 350715401 C Bi:5:011:6 -104 0<br>
ffff8800a84d6280 350715412 C Bi:5:011:6 -104 0<br>
ffff8800a8555280 350715424 C Bi:5:011:6 -104 0<br>
ffff88021ef93100 350715435 C Bi:5:011:6 -104 0<br>
ffff8801f6f33d00 350715446 C Bi:5:011:6 -104 0<br>
ffff880231256ac0 350715457 C Bi:5:011:6 -104 0<br>
ffff8800a866e640 350715469 C Bi:5:011:6 -104 0<br>
ffff8800830bbc40 350715480 C Bi:5:011:6 -104 0<br>
ffff8801f63cb040 350715493 C Bi:5:011:6 -104 0<br>
ffff8801f63cbc40 350715504 C Bi:5:011:6 -104 0<br>
ffff8800a862a340 350715516 C Bi:5:011:6 -104 0<br>
ffff8801f6f33700 350715527 C Bi:5:011:6 -104 0<br>
ffff8801fd363400 350716012 C Bi:5:011:6 -104 0<br>
ffff8800831f5100 350716025 C Bi:5:011:6 -104 0<br>
ffff8800a862ad00 350716037 C Bi:5:011:6 -104 0<br>
ffff8800a862ab80 350716048 C Bi:5:011:6 -104 0<br>
ffff8801fd22e880 350716059 C Bi:5:011:6 -104 0<br>
ffff8801f6343880 350716070 C Bi:5:011:6 -104 0<br>
ffff8800830bbb80 350716081 C Bi:5:011:6 -104 0<br>
ffff8801f63cb400 350716092 C Bi:5:011:6 -104 0<br>
ffff8800a8555580 350716104 C Bi:5:011:6 -104 0<br>
ffff88020b294a00 350716115 C Bi:5:011:6 -104 0<br>
ffff8801f6343100 350716126 C Bi:5:011:6 -104 0<br>
ffff8801f6343400 350716137 C Bi:5:011:6 -104 0<br>
ffff8800a8555c40 350716148 C Bi:5:011:6 -104 0<br>
ffff88007fd89580 350716160 C Bi:5:011:6 -104 0<br>
ffff8800a85554c0 350716171 C Bi:5:011:6 -104 0<br>
ffff8802160ccf40 350716182 C Bi:5:011:6 -104 0<br>
ffff88008319ef40 350716194 C Bi:5:011:6 -104 0<br>
ffff8802160cce80 350716205 C Bi:5:011:6 -104 0<br>
ffff880216053ac0 350716217 C Bi:5:011:6 -104 0<br>
ffff880224818dc0 350716228 C Bi:5:011:6 -104 0<br>
ffff8800a862ac40 350716240 C Bi:5:011:6 -104 0<br>
ffff8800a862ac40 350716395 S Co:5:011:0 s 00 03 0001 0000 0000 0<br>
ffff8800a862ac40 350716814 C Co:5:011:0 0 0<br>
ffff8800a862ac40 350717217 S Co:5:001:0 s 23 03 0002 0004 0000 0<br>
ffff8800a862ac40 350717266 C Co:5:001:0 0 0<br>
ffff880230812f40 350730268 C Ii:5:001:1 -2:2048 0<br>
<br>
<br>
That's all!<br>
<br>
So what does all that mean/show us? The output can look cryptic at<br>
first, but it's actually not that complicated to figure out the<br>
interesting parts. The details are explained in the docs.<br>
<br>
One easy way to reduce the number of lines which contain interesting<br>
stuff is to note that the length varies. Any line with buffer data will<br>
be longer, and we are mostly interested in those lines.<br>
<br>
The Ci/Co/Bi etc part is also worth noting. This tells the transfer<br>
type and direction using the obvious shorthand (C = control, B = bulk,<br>
i = input etc). The rest of this field is addressing, and we can pretty<br>
much just ignore it because we know we are talking to a single function<br>
on a single device (unless you were unable to dedicate a bus for the test).<br>
<br>
The S/C field in front of the type+address is also of some interest.<br>
Each transfer will consist of one S (submit) and one C (callback) line.<br>
In the last part you'll notice that usbnet submits a large number of Bi<br>
buffers once we open the interface.<br>
<br>
The number following the type+address is an error code. You'll see that<br>
it often is negative, indicating some error result. This is expected,<br>
and part of the USB system design. You deduce a lot from the errno<br>
macro names, e.g. from your<br>
<br>
/lib/modules/`uname -r`/build/include/uapi/asm-generic/errno.h<br>
<br>
file (or any kernel source or whatever). So you'll see that<br>
<br>
#define ECONNRESET 104 /* Connection reset by peer */<br>
#define EINPROGRESS 115 /* Operation now in progress */<br>
<br>
<br>
Long story. Let's look at a couple of examples from the above,<br>
filtering out a few of the longer lines. Sending the<br>
'wds-start-network' QMI command, and receiving the reply to it:<br>
<br>
ffff8800a87b1940 277691585 S Co:5:011:0 s 21 00 0000 0008 0017 23 = 01160000 01050001 0020000a 00140700 74656c65 6e6f72<br>
ffff8800831f5280 278044315 C Ci:5:011:0 0 27 = 011a0080 01050201 0020000e 00020400 00000000 01040010 057502<br>
<br>
The number in front of '=' is the data length everything after is the<br>
start of the data buffer (which includes all of it here). You don't<br>
need to decode the QMI. A basic sanity check is to know that it will<br>
always start with '01' followed by a length byte *excluding* the first<br>
byte. So we have 23 - 1 == 0x16 and 27 - 1 == 0x1a.<br>
<br>
<br>
Moving on to the bulk data, we notice that there are quite of few<br>
outgoing transfers starting with '3333', like this one:<br>
<br>
ffff8800a862a1c0 338794218 S Bo:5:011:4 -115 90 = 33330000 0016c6b0 7b58949d 86dd6000 00000024 00010000 00000000 00000000<br>
<br>
So if you know what an IPv6 ethernet multicast address looks like then<br>
you'll be able to guess what this is: The DHCP client taking the<br>
interface up triggered some MLD registrations, router solicits<br>
etc. We'll ignore those. We don't expect the modem to answer them<br>
unless we initiated an IPv6 session. But this line shows us that we are<br>
transmitting proper ethernet frames. The 3 first words are L2 dst and<br>
src addres. Then you have the ethertype (0x86dd for IPv6), followed by<br>
an IPv6 packet (starts with '6'). We note that the data is too<br>
truncated (true length is 90, but we only see the first 32 bytes) to<br>
actually figure out the content of the IPv6 packet. But we have more<br>
than enough to make sense out of it.<br>
<br>
So let's pick out the DHCP request and reply. IPv4 packets will have<br>
ethertype 0x0800, and the IP packet itself starts with '4'. So these<br>
are IPv4:<br>
<br>
ffff8802072d4f40 338819689 S Bo:5:011:4 -115 342 = ffffffff ffffc6b0 7b58949d 08004510 01480000 00008011 39960000 0000ffff<br>
ffff880216053ac0 338830335 C Bi:5:011:6 0 320 = c6b07b58 949d0250 f3000000 08004500 01320000 0000ff11 2450b04b 9aeab04b<br>
ffff8802072d4f40 338831167 S Bo:5:011:4 -115 342 = ffffffff ffffc6b0 7b58949d 08004510 01480000 00008011 39960000 0000ffff<br>
ffff8800a862ac40 338833100 C Bi:5:011:6 0 320 = c6b07b58 949d0250 f3000000 08004500 01320001 0000ff11 244fb04b 9aeab04b<br>
<br>
We send two requests to the ethernet broadcast address and receive two<br>
unicast responses from 02:50:f3:00:00:00. These packets are also too<br>
truncated to see the DHCP payload, but we do get the IPv4 source and<br>
half of the IPv4 destination address at the very end:<br>
<br>
'0000 0000ffff' => requests are sent from 0.0.0.0 to 255.255.x.x<br>
'b04b 9aeab04b' => replies are sent from 176.75.154.234 to 176.75.x.x<br>
<br>
which matches what we saw from the DHCP client.<br>
<br>
<br>
This was the uninteresting 'when everything is OK' session. But I hope<br>
this example will help you figure out where things stop on the raspberry.<br>
I assume there will be some error with the bulk transfers, or just no Bi<br>
buffers at all, or something completely different. Let's see.<br>
<span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
Bjørn<br>
</font></span></blockquote></div><br></div>