Re: regarding arp and rarp

[Guy Harris <guy () alum mit edu>]

On Jun 26, 2006, at 12:03 PM, lalani () cs fsu edu wrote:

>  I am trying to disect ARP/RARP packet.
>  Basically I am looking for this information: Operation code,  
> Sender HW address, Sender Protocol address, Destination HW address  
> and Destination Protocol address.
>  Is there a direct way using pcap to get that information.

You can use libpcap to get the raw contents of packets, including ARP/ 
RARP packets.

You can't use libpcap to dissect ARP/RARP packets - or any other type  
of packets; it doesn't include any code to dissect packets.  You  
either have to write your own code to dissect them, or use some  
existing code to dissect them (for example, you could copy the code  
in tcpdump and modify it as necessary).
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