[Click] libpcap BIOCIMMEDIATE error

[Eddie Kohler]

Well, I noted that your BPF_FILTER argument had a stray "and".  That  
causes a parse error.  Say "ether[18:4] == 0x08", not "ether[18:4] ==  
0x08 and".  Does that help?

Eddie


On Aug 22, 2005, at 5:18 PM, Daniel Henkel wrote:

> 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
>>> click at amsterdam.lcs.mit.edu
>>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>>>
>
>