Hi evry body,
I'am writing 802.16 mesh extensions for ns-2. My problem is that I can't
find the right way to send a control message (DSCH-MSH message). In fact,
this type of message have a variable length, since they are composed of a
sequence of data structures whose total number varies in function of the
number of neighbors. When i looked to the 802.11 implementation in order to
have some ideas, I found that the control messages have always a constant
length and structure:
Packet *p = Packet::alloc();
hdr_cmn* ch = HDR_CMN(p);
struct cts_frame *cf = (struct cts_frame*)p->access(hdr_mac::offset_);
assert(pktCTRL_ == 0);
ch->uid() = 0;
ch->ptype() = PT_MAC;
ch->size() = phymib_.getCTSlen();
ch->iface() = -2;
ch->error() = 0;
//ch->direction() = hdr_cmn::DOWN;
bzero(cf, MAC_HDR_LEN);
cf->cf_fc.fc_protocol_version = MAC_ProtocolVersion;
cf->cf_fc.fc_type = MAC_Type_Control;
cf->cf_fc.fc_subtype = MAC_Subtype_CTS;
cf->cf_fc.fc_to_ds = 0;
cf->cf_fc.fc_from_ds = 0;
cf->cf_fc.fc_more_frag = 0;
cf->cf_fc.fc_retry = 0;
cf->cf_fc.fc_pwr_mgt = 0;
cf->cf_fc.fc_more_data = 0;
cf->cf_fc.fc_wep = 0;
cf->cf_fc.fc_order = 0;
in 802.111, the developper has just to fill a given structure fields. How
about 80.16 ?
Could someone help me please!
Thanks in advance
Ramzi Tka
