透過封包CID取得SS

void xxx(Packet *p)
{
hdr_mac802_16 *wimaxHdr_req = HDR_MAC802_16(req);
gen_mac_header_t header_req = wimaxHdr_req->header;
....
PeerNode *peer;
peer = mac_->getCManager()->get_connection (header_req.cid, false)->getPeerNode(); //透過CID取出此CID的peer object
int index_ = peer->getPeerNode(); //取出peer object的index (mac)
}