[ns] access priority at mac header

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

Hi All,

 

• I want to know How to send the priority from ip packet to MAC frame 802.3 ?

I try to understand this problem from macDA_ and ns_addr_t dst_ . But I think they are different.

 

from mac.h:

struct hdr_mac {
                MacFrameType ftype_; // frame type
                int macSA_;  // source MAC address
                int macDA_;  // destination MAC address
               u_int16_t hdr_type_;     // mac_hdr type

               double txtime_;  // transmission time
               double sstime_;  // slot start time

               int padding_;

               inline void set(MacFrameType ft, int sa, int da=-1) {
               ftype_ = ft;
               macSA_ = sa;
               if (da != -1)  macDA_ = da;
     }

 

And 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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