Hello Jeff,
Both solutions don't satisfy my needs.
- My UML machines run only in terminal mode (no X)
- I don't want to use mechanisms which require root rights.
I've investigated the code of uml_switch and I think a slight
modification can offer a user-level sniff for UML: add a new request
type (uml_switch.c) and create a simple program which connect to the
uml_switch and just dump (in raw or libpcap format) in standard input
the traffic.
I don't think it requires a lot of works...
Julien.
Jeff Dike wrote:
> On Mon, Sep 01, 2008 at 05:44:39PM +0200, Julien Iguchi-Cartigny wrote:
>> I'm using Netkit (www.netkit.org): it's a network simulator using UML
>> and I want to show packets exchanged between the UML machines. I believe
>> the best way is to
>>
>> - use wireshark with the flag "-" to capture packets in the standard input.
>> - use netcat to read the data socket of uml_switch and print to the
>> standard output
>>
>> But uml_switch uses a ctl socket to open new port. I need a way to
>> manually open a port by uml_switch to connect netcat. I don't think
>> uml_switch offer command-line instruction for this, so is the best way
>> to write a short program writing on the ctl socket of uml_switch ? If
>> yes, what data to send to uml_switch ?
>
> If you want to capture UML network traffic going over uml_switch (be
> it with wireshark or tcpdump - it doesn't matter), there are two basic
> ways of doing it:
> enable hub mode (uml_switch -hub) and then either
>
> sniff from a UML's eth0 (a third UML if you don't want to
> interfere with the communicating UMLs), or
> add a host tap device to the switch (uml_switch -tap tap<n>)
> and sniff that.
>
> Jeff
>
--
Trouble-a-cat Limited
begin:vcard
fn:Julien Iguchi-Cartigny
n:Iguchi-Cartigny;Julien
org;quoted-printable;quoted-printable:Universit=C3=A9 de Limoges;D=C3=A9partement DMI
adr;quoted-printable:83, rue d'Isle;;Site Jid=C3=A9;Limoges;;87000;France
email;internet:[EMAIL PROTECTED]
title:Assistant Professor
tel;work:+33555436930
tel;cell:+33681606483
x-mozilla-html:FALSE
url:http://msi.unilim.fr/~cartigny/
version:2.1
end:vcard
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
