[ns] where is the "hdr_flags" constructed?

[鲁德来]

hi all,
 
I saw the  
 
 hdr_flags* hf = hdr_flags::access(p); hf->ecn_capable_ = 0; hf->ecn_ = 0; 
hf->eln_ = 0; hf->ecn_to_echo_ = 0; hf->fs_ = 0; hf->no_ts_ = 0; hf->pri_ = 0; 
hf->cong_action_ = 0; hf->qs_ = 0;
 
in the Agent::initpkt(Packet* p) const
 
but I can not find the hdr_flags definition in ns2? could anyone told me which 
file it is in ? thanks alot
 
Delai
_________________________________________________________________
天凉了，添衣了，心动了，“七件”了 
http://get.live.cn