Re: [ns] the direction field in packet header hdr_cmn

[Chalermek Intanagonwiwat <intanago@isi.edu>]

I think you are right.

-- Chalermek

On Mon, 19 Jun 2000, Yan Yu wrote:

> HI, there, 
>   by looking up the mac layer code, (like mac.cc, mac-802_3.cc, or
> bi-connector.cc), it seems that the MAC layer judge if it is sending or
> receiving the packet( i.e., if the packet is traveling up or down the
> stack) by looking up the direction field in packet header. but from my
> simulation, it seems like the the direction filed is not set up
> properly. I am using Mac-802_3 as MAC layer, LLSnoop as link layer..
> I am wondering who is responsible for setting up the direction field in
> hdr_cmn? which layer??
> 
> I guess, say, if it travels up the stack( receving a packet, physical
> layer is responsible for setting it as UP. and as it travels down, the
> higher layer, e.g., application layer, or network layer is reposbile for
> setting it up as DOWN??
> 
> any feedback on this is very appreciated!!
> yan
> 
>