Package: wpasupplicant Version: 0.4.7-4 Severity: normal Tags: patch
Hello, After upgrading from wpasupplicant version 0.4.7-3 to 0.4.7-4, ifplugd is not working correctly any more for my wlan interface. The problem is (see: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=348698) that ifplugd needs wpa_supplicant running - ALWAYS = system daemon, before configuring interfaces - for detecting link-beats on a wlan interface, if your wireless network is WPA-PSK (as is my case). With current wpasupplicant start/stop scheme - using if-pre-up / if-post-down scripts - ifplugd never detects link-beats, because in this case wpa_supplicant would start running after interface configuration, which in turn should be initiated by ifplugd. Thus, we have a cycle dependency which is never met. Therefore, current wpasupplicant start/stop scheme should be flexible enough to allow start/stop at if-pre-up / if-post-down, as well as system start and system stop (shutdown). That is, the user should be able to choose wpa_supplicant behaviour from these 2 options: - Run wpa_supplicant as a system daemon (rcNUMBER.d mode) - Run wpa_supplicant only while interface is configured (if-pre-up / if-post-down) I have found an easy solution for this issue, which I explain below: - In /etc/default/wpasupplicant add a new flag RUN_AS_SYSDAEMON to choose from one of those behaviours above: * If RUN_AS_SYSDAEMON=0 then /etc/init.d/wpasupplicant only completes execution if called from ifupdown script (it checks a stamp file created by the ifupdown script), otherwise it aborts. * If RUN_AS_SYSDAEMON=1 then ifupdown script never completes execution in this case /etc/init.d/wpassupplicant runs as usual. - I have modified the if-pre-up.d / if-post-down.d scripts: I have merged them into a single one. This new ifupdown script checks for RUN_AS_SYSDAEMON variable in /etc/default/wpasupplicant, and behaves as described above. The ifupdown script creates a stamp file in /var/run to "tell" /etc/init.d/wpasupplicant that it can execute despite having RUN_AS_SYSDAEMON=0, then it calls /etc/init.d/wpasupplicant, and after this has been executed, it (ifupdown script) deletes the stamp file. - The last modification goes to /etc/init.d/wpasupplicant, which also checks RUN_AS_SYSDAEMON variable and behaves accordingly. With this setup /etc/init.d/wpasupplicant can (in fact must) be registered into rc* directories as it was in previous versions (e.g. 0.4.7-3). I include attached the files described above. In this order: /etc/default/wpasupplicant /etc/network/if-pre-up.d/wpasupplicant-ifupdown (also valid for if-post-down.d/) /etc/init.d/wpasupplicant -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (500, 'testing') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.15-1-686 Locale: [EMAIL PROTECTED], [EMAIL PROTECTED] (charmap=ISO-8859-15) Versions of packages wpasupplicant depends on: ii libc6 2.3.5-13 GNU C Library: Shared libraries an ii libncurses5 5.5-1 Shared libraries for terminal hand ii libreadline5 5.1-6 GNU readline and history libraries ii libssl0.9.8 0.9.8a-7 SSL shared libraries wpasupplicant recommends no packages. -- no debconf information
# /etc/default/wpasupplicant
# WARNING! Make sure you have a configuration file!
ENABLED=1
RUN_AS_SYSDAEMON=1
# This field sets the driver that wpa_supplicant will use to communicate
# with the hardware.
#
# IPW users will want to use wext (if they have a modern kernel) or ipw
# if they have an older kernel (older than 2.6.14)
#
# Other possibilities are hostap, ndiswrapper, madwifi, ...
DRIVER=wext
# This field must be set to your wireless interface. If it's hotpluggable
# and can change names, consider using something like ifrename to set it
# to something static.
#
# The interface is typically ethX, or wlanX, or athX.
INTERFACE=eth1
# Path to the configuration file, typically /etc/wpa_supplicant.conf
CONFIG=/etc/wpa_supplicant.conf
# See the manual page wpa_supplicant(1) for more options and information.
#OPTIONS="-w"
OPTIONS="-w -i ${INTERFACE} -D ${DRIVER} -c ${CONFIG}"
# EXAMPLES:
# OPTIONS="-i wlan0 -D hostap -c /etc/wpa_supplicant.conf"
# OPTIONS="-i ath0 -D madwifi -c /etc/wpa_supplicant.conf"
wpasupplicant-ifupdown
Description: application/shellscript
wpasupplicant
Description: application/shellscript
