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Bug#: 215714
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Status: RESOLVED
Resolution: FIXED
Assigned To: Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel@gentoo.org>
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Reporter: whitehawk <akos.demeter@gmail.com>
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Description:   Opened: 2008-04-01 15:28 0000 
The rtap0 interface can't  be brought up with ifconfig rtap0 up. I have tested
it in gentoo-sources 2.6.23 and 2.6.22 and it worked. I tested gentoo-sources
2.6.24-rX and didn't have any success. I also tested vanilla-sources 2.6.25-rcX
and it does not work.

~ # ifconfig rtap0 up
SIOCSIFFLAGS: Invalid argument
~ # 

the rtap0 interface exist, it is listed with ifconfig -a

------- Comment #1 From Daniel Drake 2008-04-01 20:22:37 0000 ------- 
you dont need to bring it up

------- Comment #2 From whitehawk 2008-04-02 06:01:23 0000 ------- 
Can you show me a link that states this? It is not working without being
brought up. I tried wireshark. From kernel menuconfig:

CONFIG_IPW2200_PROMISCUOUS:                                                     

Enables the creation of a second interface prefixed 'rtap'.                     
This second interface will provide every received in radiotap                   
format.                                                                         

This is useful for performing wireless network analysis while                   
maintaining an active association.                                              

Example usage:                                                                  
% modprobe ipw2200 rtap_iface=1                                                 
% ifconfig rtap0 up                                                             
% tethereal -i rtap0

------- Comment #3 From whitehawk 2008-04-02 18:29:06 0000 ------- 
I verified the behavior with other people. To use the rtap0 you must activate
it. Only then can you capture packets with for example wireshark or
airodump-ng.

------- Comment #4 From whitehawk 2008-04-02 18:53:03 0000 ------- 
reopening it

------- Comment #5 From Daniel Drake 2008-04-02 19:34:55 0000 ------- 
Sorry for incorrect diagnosis, I think I got confused with something else.

As debugged on IRC, this is another case of an all-zero mac address. Sent a
patch upstream.

------- Comment #6 From Daniel Drake 2008-04-19 21:19:30 0000 ------- 
Fixed in gentoo-sources-2.6.24-r6 / genpatches-2.6.24-7

------- Comment #7 From Hendrik Lemelson 2008-07-24 14:04:02 0000 ------- 
I am having the same issue again with 2.6.24-r8.
rtap0 is there with "iwconfig" but cannot be brought up with "ifconfig rtap0
up".
Didn't the patch make it into 2.6.24-r8?
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