[Click] libpcap BIOCIMMEDIATE error

[Daniel Henkel]

Eddie,

the ioctl() returns with 'Invalid argument'. After some fiddling
around, I realized that I was compiling against libpcap 0.6.2 on my
devel machine, but had 0.7.2 installed on the Pebble system. So I
downloaded libpcap 0.8.3, compiled from sources, and installed this
version on both machines. Btw, it does not work with the 0.6.2
version, since ARP 803 is not supported. Click now works with a
/usr/lib/libpcap.so, which is I set up as just a symlink to the actual
libpcap.so.0.8.3 on both machines.

So far, so good. However, the next problem was a missing IP address on
the ath0raw interface. I gave it a random 192.168.0.x address, which
solved that problem.

Since all good things come in a three-pack, as the third problem
FromDevice initialization now returns 'ath0raw: parse error'. Router
could not be initialized. It seems as if this raw interface causes
trouble. Any idea how to solve this puzzle?

- Daniel.

.....
Interdisciplinary Telecommunications Program
University of Colorado at Boulder
http://AUGNet.colorado.edu

---- Original Message ----
From: Eddie Kohler
To: Daniel Henkel <henk at gmx.com>
CC: click at amsterdam.lcs.mit.edu
Subject: [Click] libpcap BIOCIMMEDIATE error

Saturday, August 20, 2005, 12:41:04 PM, you wrote:

EK> Hi Dan,

EK> Can you try printing out the actual ioctl return value?  That might tell
EK> you what the error is.  I've checked in a little code to do this.

EK> Eddie




EK> Daniel Henkel wrote:
>> Hi,
>> 
>> I am trying to use FromDevice() with CAPTURE PCAP under Linux 2.4 with
>> Atheros madwifi and libpcap.so.0.8.3. I'm using this line:
>> 
>> FromDevice(ath0raw, CAPTURE PCAP, BPF_FILTER "ether[18:4] == 0x08 and
>> ")
>> 
>> However, the configuration can not be initialized and returns
>> FromDevice: BIOCIMMEDIATE failed. FromDevice tries to switch the
>> pcap_fd into immediate mode, returning right after each packet
>> reception. For some reason this ioctl call returns an error. Any idea
>> what to do? Is it at all necessary to switch the socket into immediate
>> mode in Linux?
>> 
>> Thanks,
>> - Daniel.
>> 
>> .....
>> Interdisciplinary Telecommunications Program
>> University of Colorado at Boulder
>> http://AUGNet.colorado.edu
>> 
>> _______________________________________________
>> click mailing list
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