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Re: [Discuss-gnuradio] SSH using gr-ieee 802.11 transceiver : (the youtu
From: |
Bastian Bloessl |
Subject: |
Re: [Discuss-gnuradio] SSH using gr-ieee 802.11 transceiver : (the youtube demo) |
Date: |
Wed, 12 Jul 2017 08:16:50 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
Hi,
On 07/12/2017 07:36 AM, sumit kumar wrote:
Hi,
Actually I am trying the same set-up :) However I face some issues. Such
as , when I configure my TP Link dongle (ath9k) in ad-hoc mode, it
switches to 802.11b, instead of 802.11g. Could you suggest any such
dongle where I can force change the modulation method.
Try forcing the dongle to a specific rate after you switched it to ad
hoc mode. If that doesn't work, I would use the 5GHz band (there it
doesn't downgrade to 11b). Make sure to use a channel that doesn't
require DFS.
Regarding, ARP entries, I had the idea (couldn't go ahead becz dongle
switch to 802.11b) : First establish adhoc connection between two
dongles(so that ARP tables are updated). Then copy mac address of one
dongle(say dongle A) to the transmitter of my openairinterface wifi
transceiver, then power off the dongle A and turn on my own cloned
transceive >
However I was trying to send ACK for the pings generated from dongle B
(the other dongle) before the layer 2 trails are exhausted. I am trying
all this inside a RF cage.
That's a question for the people from openairinterface.
How do you manage to work without sending ACK. Also I believe , you did
that video demo over the air. How did you manage without CSMA :)
Sending ACKs is not the same as CSMA. The transceiver doesn't send ACKs,
if some packet is lost, TCP resends the segment. (ARQ happens on
transport layer not on link layer).
Best,
Bastian
Best,
Bastian
Regards
Sumit
* It reminds me of tunnel application which I ran on GNU Radio
long back (2012 I guess). There was an application tunnel.py
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--
Dipl.-Inform. Bastian Bloessl
CONNECT Center
Trinity College Dublin
GitHub/Twitter: @bastibl
https://www.bastibl.net/
--
Sumit Kumar
--
Dipl.-Inform. Bastian Bloessl
CONNECT Center
Trinity College Dublin
GitHub/Twitter: @bastibl
https://www.bastibl.net/