["vinaya muralidharan" <vinnie_m1@xxxxxxxxxxxxxx>]

Hi,
	I am currently working on the software implementation of a LAN 
switch. What we have here is a multihomed PC with the NICs 
connected to different logical segments. When a workstation on one 
logical segment wishes to communicate with a workstation on 
another segment, it sends a packet to the corresponding machine. 
The NICs on the switch are in promisc mode so they intercept all 
packets. They do so by using sock_raw and recvfrom (in linux). Now 
we need to put these packets on the right interface and forward 
them to the destination machine.
	The problems are these: I have a sniffer program on 1 
machine(uses sock_raw), using sendto I try to send some packets to 
this machine. The output says that the packet was transferred, but 
the sniffer code does not show the packet!
Could someone please tell me how to write packets at the data link 
layer with the original source address intact(we send the packets 
using our switch, but source address should not change)?

Also if you could mail me some sample code, it'll be splendid!
Thanx for the help,
Vinaya Muralidharan.