Re: [ns] Using Raw IP in emulator

[Alefiya Hussain <alefiyah@catarina.usc.edu>]

To contact the "real-world" node from ns you would require to generate 
UDP-IP packets destined for 10.0.0.2 and then write them out on the raw
socket. 

This functionality is currently not available in ns. 

ns emulation currently picks up packets from the network using pcap ,
passes them through ns simulator and then put it back on the network. 

Hence you could emulate the following currently:

10.0.0.1 - - - - - n2----------n1 - - - - - - 10.0.0.2
		 PCAP       Network/IP

I hope that helps,
- Alefiya

On Wed, 18 Apr 2001, Mark Janssen wrote:

> Hello all,
> 
> I have succeeded in compiling nse on FreeBSD 4.2 and all seems to work just fine.
> Now I have a question on raw-ip ports.
> I want to achieve the following.
> I want to connect two nodes with eachother. n2 will be connected to a CBR source and n1 to a raw ip object.
> The traffic should then be sent on the real network to another machine with ip 10.0.0.2. So graphically:
> 
> n2----------------n1 - - - - - - - - - - - - 10.0.0.2 
> CBR            Network/IP
> 
> How can I achieve this? I have looked at the examples but that are mostly opposite
 situations where the ip sockets forward traffic which has been recieved by a PCAP agent.
> But I don't want to use captured traffic. I want to generate my own,
 which leaves me puzzled. How can I set the destination IP-address of the CBR traffic?
> 
> Any help would be greatly appreciated.
> 
> Best regards,
> 
> Mark Janssen
>