Linux Kernel supported usb packet analysis

Host :

1) usbmon

2) usb-snooping

Reference’s:

1) Snooping USB data stream -  GK-H

Gadget:
?

Libusb Examples

Refenerce’s :

Jan Axelson’s WinUSB example under Linux with libusb

Tutorial on USB with Linux

Developing Linux driver using Libusb

USB 3.0

News:

µPD720200 is the world’s first USB host controller compliant with the USB 3.0 and xHCI

NEC Electronics

USB Ethernet Testing

Host:

As a Device(Gadget):

1) using ipref

* download iperf from http://sourceforge.net/projects/iperf/files/

* cd to iperf-2.0.4

* assuming toolchain at /opt/arm-2007q3,    export PATH=/opt/arm-2007q3/bin:$PATH

*  ./configure –host=arm-none-linux-gnueabi –build=i686-pc-linux-gnu AR=/opt/arm-2007q3/bin/arm-none-linux-gnueabi-ar CC=/opt/arm-2007q3/bin/arm-none-linux-gnueabi-gcc LD=/opt/arm-2007q3/bin/arm-none-linux-gnueabi-ld CXX=/opt/arm-2007q3/bin/arm-none-linux-gnueabi-g++ –prefix=/opt/ipref

* make

[ Note: if similar error came as rpc_alloc, disable following line from config.h

/* Define to rpl_malloc if the replacement function should be used. */

//#define malloc rpl_malloc

Ref. to discussion at linux forum

* make install

* copy /opt/iperf/bin/iperf to /usr/local/bin of BeagleBoard(ARM platform) RFS.

On linux host

shivdas@shivdas-laptop:~$ iperf -s

------------------------------------------------------------

Server listening on TCP port 5001

TCP window size: 85.3 KByte (default)

------------------------------------------------------------

[  4] local 192.168.0.200 port 5001 connected with 192.168.0.202 port 51887

connect failed: Connection refused

[ ID] Interval       Transfer     Bandwidth

[  4]  0.0-10.0 sec    222 MBytes    186 Mbits/sec

On BeagleBoard

root@beagleboard:~# iperf -c 192.168.0.200 -d

————————————————————

Client connecting to 192.168.0.200, TCP port 5001

TCP window size: 35.2 KByte (default)

————————————————————

[  3] local 192.168.0.202 port 51887 connected with 192.168.0.200 port 5001

————————————————————

Server listening on TCP port 5001

TCP window size: 85.3 KByte (default)

————————————————————

Waiting for server threads to complete. Interrupt again to force quit.

[ ID] Interval       Transfer     Bandwidth

[  3]  0.0-10.0 sec    222 MBytes    186 Mbits/sec

root@beagleboard:~#

Reference’s:

http://dominion.thruhere.net/koen/cms/measuring-network-throughput-with-iperf

http://openmaniak.com/iperf.php

http://unixfoo.blogspot.com/2009/02/iperf-network-throughput-measurement.html

Good USB videos and gadgets

Gadgets:

1) Mini USB Monitor: A single USB connection from your computer gets you an instant high-resolution secondary display.

Videos:
1) Cool video showing different usb gadgets

Mass storage’s and Pen drives -

1)  How’s a USB flash drive made ? – From Kingston production plant

2) Magnum 128 GB pen drive

Power management and USB -

1) USB Portable Power supply

2) USB Cell – Rechargable AA size battery

Windows USB tools for testing and monitoring

USB Analyzers

USB monitors

1)  View, monitor and control connected USB devices

http://www.nirsoft.net/utils/usb_devices_view.html

Tools for Performance testing and Benchmarking

Wireless USB

Wireless USB :

Reference’s:

White Paper from NEC Electronice

qusbmon – usb-sniffer using QT [GPLv2]

1) download from

svn checkout http://qusbmon.googlecode.com/svn/trunk/ qusbmon-read-only

2) sudo apt-get install qt4-qmake

3)  sudo qmake

4) sudo apt-get install qt4-dev-tools

5) sudo apt-get install libsqlite3-dev

6) sudo make

7) mount debugfs for usbmon

mount -t debugfs none_debugs /sys/kernel/debug

8 ) goto  bin and run “sudo ./qusbmon”

Thanks to :

http://code.google.com/p/qusbmon/

USB and Boot-loaders

Following post tries to gather some information regarding usb bootloaders.

Linux Kernel and USB

How usb subsystem is implemented in linux kernel, as of kernel.org kernel v2.6.30-rc7

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=shortlog;h=v2.6.30-rc7

Directory Structure:

.
|– Kconfig
|– Makefile
|– README
|– atm
|   |–
|   `–
|– c67x00
|   |–
|   `–
|– class
|   |–
|   `–
|– core
|   |–
|   `–
|– gadget
|   |–
|   `–
|– host
|   |–
|   `– whci
|       |–
|       `–
|– image
|   |–
|   `–
|– misc
|   |–
|   |– sisusbvga
|   |   |–
|   |   `–
|   |–
|   `–
|– mon
|   |–
|   `–
|– musb
|   |–
|   `–
|– otg
|   |–
|   `–
|– serial
|   |–
|   `–
|– storage
|   |–
|   `–
|– usb-skeleton.c
`– wusbcore
|   |–
|   `–
16 directories, 415 files

==============================================================================

How “String Descriptor’s” are manupulated and handled in kernel?

Spec reference:

Host Side:

Device Side:

What is Language Id, where is it in spec, and kernel?
URL reference:

http://www.usb.org/developers/docs/

http://www.usb.org/developers/docs/USB_LANGIDs.pdf

Language Identifiers: They are composed of a 10-bit (9-0) Primary Language Identifier and a 6-bit (15-10) Sublanguage Identifier.

Lets take a most famous example of language Id ox0409 English US. For this Primary language identifier is 0×09 (LANG_ENGLISH – English) and Sub-language Identifier is 0×01(SUBLANG_ENGLISH_US – English(US)), So

Language Identifier (0×0409)= Sublanguage Identifier(00 0001b)+Primary Language Identifier(00 0000 1001b)