How are you Sir,
In my project i need the code to do the following:
While the packet passes through the nodes in the path from the sender to the
receiver, each node has a unique id consists of for example 3 or 4 bits, and
there is a field of 16 bits in each packet header that holds the node id after
XORing it with the old value.
I acctually did the following:
1- In the structure hdr_ip in the file ip.h , i added a variable of type int
named tag_ to hold the node's id after doing XOR with the old values as i said
befor.
2- And also in the same place i added an access function lkie this int& tag()
{return tag_;}
3- In the file ip.cc, in the function export_offsets() , i added this line
field_offset("tag_", OFFSET(hdr_ip, tag_));
I think, by these above three steps i added a new field in the packet headers
that carry the nodes id after doing XOR between old and new values.
In the file agent.cc, and in the function Agent::initpkt() , i added these two
lines:
iph->tag() = 3;
printf("\n This packet has a tag of %d", iph->tag_);
I think these two lines are used for debugging.
So, if these steps are correcet, is there any one can help me to build on them
to finish my task, please "i need your help Urgently"
Thank you friends,
Eng. Magdy Fadel
________________________________
From: Magdy Fares <mfare...@yahoo.com>
To: "ns-users@isi.edu" <ns-users@isi.edu>
Sent: Saturday, February 2, 2013 12:14 AM
Subject: Code for editing packet header
To NS-Users,
I am a Ph.D. student of and part of my project trys to XOR some
data in the packet header while it travrses from the source to the destination.
So i *urgently* need code to accomplish this point please.
So, Any One have code for this plz forward it **Urgently.**
Thanks and regards,
Magdy
Fadel
