It is true that explanation of codes are not available and it is difficult to understand the source code files. But I can give you some hint to proceed. I am assuming that you are familiar with Tcl part and will explain you how to proceed to understand the source codes written in C++.

1. First understand the basic files. Mobilenode.cc, Mobilenode.h and Packet.h.

2. In Mobilenode.cc and Mobilenode.h, all the properties related to nodes are provided (see all the properties in Mobilenode.h e.g. X and Y coordinates, speed etc). You will have to learn that how to extract the node properties by just knowing the node id in any routing protocol source code (for example aodv.cc). If you can learn this, you will be able to modify the node properties at run time (however it is not required in case of nodes. Usually, headers of packets are needed to be changed during runtime).

3. Repeat the second step for packet.h. In packet.h you will also have to learn to use the common header and ip header (provided in a separate file named ip.h).

4. After you are comfortable with above files, try to make changes into an existing routing protocol file to convert it into your protocol.

Give around one month time to first three steps, it will benefit you in future.

Hi Raghavendra Pal

Thanks for the heads up. I already started playing around the header files of aodv and dsr and would try to come up to speed.