Re: Capturing packets for physical and virtual WLAN card.......

[prachi dhamorikar <prachi_dh123 () yahoo co in>]

I have to virtualize a physical WLAN card into multiple virtual cards, wherein I will be able to connect to multiple 
wireless networks simultaneously...........which means I dont have to purchase multiple wireless cards for connecting 
to multiple wireless networks.
Below are the tasks which I have to perform. Will you guide me in how to achieve these tasks ? 
1) Is it possible to capture the packets in wireshark for two different IP addresses ? The reason being that, two 
virtual cards will have two different IP addresses and I have to capture the packets coming only from these IP 
addresses only (by filtering) and then have to generate their combined throughput graph. I will be using IPERF to send 
the packets through the cards.
It will be really helpful if You can provide me with the solution as soon as possible. Because, I was trying to capture 
the packets for both the IP addresses in wireshark, but I was getting some errors. Also, the laptop on which I am 
capturing the packets is connected to the same server on which my first card is virtualized. But, in order to connect 
my 2nd virtual card to an Iperf Server, I may require different server. I am not sure about it, so I need some guidance.

Regards,Prachi

--- On Tue, 5/7/11, mahendra kumawat <mahendra.u27 () gmail com> wrote:

From: mahendra kumawat <mahendra.u27 () gmail com>
Subject: Re: [Wireshark-users] Capturing packets for physical and virtual WLAN card.......
To: "Community support list for Wireshark" <wireshark-users () wireshark org>
Date: Tuesday, 5 July, 2011, 12:40 PM

Can you give us more information about your project?.

Try this, may be work
ip.host == "first" and ip.host=="host"


On Sun, Jul 3, 2011 at 10:10 PM, prachi dhamorikar <prachi_dh123 () yahoo co in> wrote:


To mailing lists,
I am doing a project on "Virtualization of Wireless Networks", wherein I have to virtualize the physical WLAN card into 
multiple virtual WLAN cards using VirtualWiFi software....

I will be using two laptops for my project. One will be Windows 7 OS, which will be capturing the packets and will be 
acting as Iperf Server. And second laptop, which will be Windows XP OS, in which I will do the virtualization of 
physical WLAN card into two virtual WLAN cards and it will be acting as an Iperf Client. Both these laptops are 
wirelessly connected with each other.

My tasks are :
1) To measure the throughput of both the physical and virtual WLAN cards. For this, I have to use the Iperf tool in 
order to send the UDP packets with
 different traffics. As soon as I run the commands on the Iperf Client & server, I have to capture the packets in the 
wireshark in order to generate the IO graph (Throughput graph) for the physical and virtual wlan card.

My query is:  As I will be capturing the packets in the wireshark, I will be getting the packets from all the IP 
addresses. But, as I only want to measure the throughput of Physical card, then how I should filter the packets only 
for that card ?  Is it that, I have to give the following command

ip.addr== ip address of the physical card in the filter tab of wireshark . After which I can get the throughput graph 
from the IO graph. 
2) How to capture the packets for the two virtual WLAN cards simultaneously in the wireshark ?

My project is, to virtualize the physical WLAN card into multiple virtual cards
 wherein the user will be able to connect to multiple wireless networks with just one physical wlan card.
In order to implement this, I have virtualized my physical card into two virtual cards, each of which have different IP 
addresses. That is, virtual card 1 has one IP address and virtual card 2 has different IP address.

My query is: If i want to capture the packets coming only from both the virtual cards, then how I will be able to 
filter the packets for two different IP addresses simultaneously ? so that I can get the combined throughput graph of 
both the virtual cards simultaneously.

Kindly do provide me with the solution. Awaiting your feedback.

Regards,Prachi



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