Wireless Tools v29

Version 29 adds :

Support for long/short retry (WE-21).
Support power saving level, modulation (WE-21 - not in kernel).
Scanning options.
Better WPA support.
Enhanced command line parser in iwconfig.
sysfs symlinks and udev integration in ifrename.
More footprint reduction tricks.
Support for 32 bit Wireless Tools on 64 bits kernels.
Change dBm range to support positive dBm.

Wireless Tools v28

Version 28 adds :

Add preliminary display-only WPA support (WE-18).
Display AP-Address as 'Not-Associated' instead of a number.
Add sysfs selector to ifrename.
Make mac selector of ifrename accept any length MAC addresses, such as Firewire addresses.
Longer scanning timeout for driver having slow scanning, such as MadWifi.
Add iwmulticall and stripping option to reduce footprint of the tools for memory starved systems.
Use glibc header instead of kernel header to ease iwlib use.
Better integrity check of scan results.
Forward compatibility to WE-21 (essid length)

Wireless Tools v27

Version 27 adds :

Ability to run with multiple version of Wireless Extensions. It means that all WE version mismatch are gone, and you don't need to recompile when changing between kernels with different WE version. The tool redirector is obsolete and removed.
Make libiw really usable by third party tools. This include the removal of the WE version dependancy, the stabilisation of the API and the addition of the easy Scanning API.
Add ifrename, to rename network interfaces based on various static criteria, and associated documentation
Add advanced documentation about network Hotplug and related stuff in HOTPLUG.txt
Support auto/fixed frequencies and relative tx-power (WE-17)
Support very large scan results and private definition lists (WE-17)
Optionally disable individual quality statistics (WE-17)
Support event capability in iwlist event (WE-17)
Display channel alongside frequencies in iwlist and iwevent
Display updated quality statistics with '=' instead of '(updated)'
Implement iwconfig XXX txpower on and fixed
Fix redirection of iwevent output to file/pipe
Add raw display and channel support in iwgetid
Various bugfixes, optimisations and cleanup

Wireless Tools v26

Version 26 adds :

Fix bugs in parsing encryption keys and setting encryption on in iwconfig.
Update distribitions specific documentation in DISTRIBUTIONS.txt
Really allow compile without maths library for embeeded platforms
Support new iwspy features (setthr and related event) (WE-16)
Add tool redirector for people having multiple kernels with different Wireless Extension versions (WE-16)
Various trivial bugfixes and cleanup
Various Makefile and and iwlib improvements

Wireless Tools v25

Version 25 adds :

Start document distribitions specific wireless configuration scripts in DISTRIBUTIONS.txt
Enumerate all network interfaces (fix problem with NWN drivers)
Improve private extension support : new types, sub-ioctls, iwpriv -a, handle more than 16 extensions... (WE-15)
Fix infinite loop with unknown Wireless Events (bad bug)
Add new Wireless Events : IWEVCUSTOM, IWEVREGISTERED and IWEVEXPIRED (WE-15)
Show current settings in iwlist for freq, rate and txpower
New iwgetid options : mode, freq, protocol
Implement --version to show tools and WE versions
Improve version warning messages to be hopefully less confusing
Allow compile without maths library for embeeded platforms
Makefile fixes, various other cleanups

Wireless Tools v24

Version 24 adds :

Fix a bug that prevents disabling encryption and setting authentication (introduced in version 23)
Change the way tools enumerate wireless interfaces. Tools no longer lists interfaces not supporting /proc/net/wireless, but lists interfaces which are down.
Wireless Event support (WE-14)
Scanning support (WE-14 - replaces now obsolete iwlist aplist)
Support iwconfig ethX ap auto/any/off
Man pages for iwevent and iwgetid
Improved system header definitions, more complete libiw, cleanups...

Wireless Tools v23

Version 23 adds :

Fix a problem when trying to use iwspy before the interface is configured
Add missing commands in the iwlist man page
Fix "make install" and install man pages
Automatic glibc/kernel header configuration
Nicer iwconfig error messages
Add iwconfig ethX commit (WE-13)

Wireless Tools v22

Version 22 adds :

Fix minor bugs in parsing command line
Most basic functions of the tools available as a library (libiw)
Add a few extra wireless statistics (WE-12)

Wireless Tools v21

Version 21 adds :

Improved power management support (WE-10)
Transmit Power parameter (WE-10)
Document wireless.opts and Pcmcia scheme usage (multi cards, multi setups)
Better Makefile, header options can be set there
Support for GLibc2.2
Check Wireless Extension version mismatch (WE-11)
Retry settings (WE-11)
Split iwspy into iwspy and iwlist

Wireless Tools v20

Version 20 was already adding :

Operation mode support (managed/ad-hoc) (WE-9)
Power saving support (WE-9)
New encryption support (WE-9)