[ns] the priority from application layer to network layer

["Ahmad Ali" <mayyar8@hotmail.com>]

Hi All,


     I want to know How to send the priority from application layer to ip 
packet?

     I found the field of priority in the hdr_ip "prio_". But How the 
priority from application layer can access ip packet at network layer?
Note: When the network layer receive the packet from upper layers it 
encapsulated form.

From ip.h

     struct hdr_ip {
                 /* common to IPv{4,6} */
                  ns_addr_t src_;
                  ns_addr_t dst_;
                  int  ttl_;
                 /* Monarch extn */
                 //  u_int16_t sport_;
                //  u_int16_t dport_;

                /* IPv6 */
                int  fid_; /* flow id */
                int  prio_;
                static int offset_;
                inline static int& offset() { return offset_; }
                inline static hdr_ip* access(const Packet* p) {
                return (hdr_ip*) p->access(offset_);
      }



     How can I access the priority at a node? Then How can put it in ip.h  
"prio_" ?


Thanks for your cooperation in advance.
With best regards

Ahmad Ali
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