packet_gen()

he goal of packet_gen() is to randomly generate a data packet in the format:

source;destination;size

For example:

nodeB;nodeD;734

This means: create a packet that starts from nodeB, is going to nodeD, and is 734 bytes in size.

We’ll randomly pick both the source and destination nodes from the linked list, and also randomly pick a size between 100 and 1500 bytes.

How do we do this?

To generate the packet string, you need to:

1. Random Selection:

   • Pick two different nodes (source and destination) randomly from the linked list.

   • Make sure they are not the same node.

2. Packet Size:

   • Generate a random number between 100 and 1500, inclusive.

3. Formatting:

   • Use sprintf() to format the string as src;dest;size.

4. Return:

   • Return 0 on success.