NSOC2011ClickMac/MidTermReport

Approach

The approach has been described in detail on the wiki link: [1]

Progress

Radiotap Support for ns-3's Wifi model

• Radiotap header support was created at YansWifiPhy::EndReceive() with the necessary modifications to send the headers up the stack through MacLow and MacRxMiddle. A certain amount of Pcap refactoring was done to permit the traces to contain the radiotap information. Further modifications were made for the headers to be sent higher up the stack.

A MonitorWifiMac abstraction

• The work included the creation of a MonitorWifiMac abstraction that would essentially be a copy of the non-QoS part of RegularWifiMac, an implementation that would work independently of the type of station. Provision of a Monitor Mode was made with the required modifications in WifiNetDevice. The packet reception was then tested at MonitorWifiMac::Receive(), where the radiotap header would be added to the packet.

Test script for Monitor Mode

• A test script was developed similar to the existing wifi-simple-adhoc-grid example for the purpose of testing the Monitor Mode and the correct working of the MonitorWifiMac class. For this purpose, a lone monitor node was chosen to be in the midst of a grid of AdhocWifiMac nodes capable of communicating with each other. The monitor node would be capable of receiving all the packets. The script has been Click-based to print information about the received packets within Click.

To summarize, this work includes the the Rx side of Monitor Mode and Radiotap support for ns-3's Wifi model.

Future work: Tx-vector modifications