ll.h

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1997 Regents of the University of California.
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 *  This product includes software developed by the Daedalus Research
 *  Group at the University of California Berkeley.
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 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/mac/ll.h,v 1.29 2005/04/26 18:56:35 haldar Exp $ (UCB)
 */

#ifndef ns_ll_h
#define ns_ll_h

#include <delay.h>
#include <queue.h>
#include <arp.h>
#include <classifier.h>
#include <lanRouter.h>
#include <varp.h>

enum LLFrameType {
    LL_DATA     = 0x0001,
    LL_ACK      = 0x0010
};

struct hdr_ll {
    LLFrameType lltype_;        // link-layer frame type
    int seqno_;         // sequence number
    int ackno_;         // acknowledgement number
    int bopno_;         // begin of packet seqno
    int eopno_;         // end of packet seqno
    int psize_;         // size of packet
    double sendtime_;       // time the packet is sent

    static int offset_;
    inline int& offset() { return offset_; }
    static hdr_ll* access(const Packet* p) {
        return (hdr_ll*) p->access(offset_);
    }

    inline LLFrameType& lltype() { return lltype_; }
    inline int& seqno() { return seqno_; }
    inline int& ackno() { return ackno_; }
    inline int& bopno() { return bopno_; }
    inline int& eopno() { return eopno_; }
    inline int& psize() { return psize_; }
    inline double& sendtime() { return sendtime_; }
};


class LL : public LinkDelay {
public:
    friend void ARPTable::arpinput(Packet *p, LL* ll);
    friend void ARPTable::arprequest(nsaddr_t src, nsaddr_t dst, LL* ll);
    LL();
    virtual void recv(Packet* p, Handler* h);
    void handle(Event* e) { recv((Packet*)e, 0); }
    inline int initialized() {
        return (mac_ && uptarget_ && downtarget_);
    }

    virtual void sendUp(Packet* p);
    virtual void sendDown(Packet* p);
    
    inline int seqno() { return seqno_; }
    inline int ackno() { return ackno_; }
    inline int macDA() { return macDA_; }
    inline virtual void hdr_dst(Packet *p, int macDA) {}
        inline Queue *ifq() { return ifq_; }
        inline NsObject* downtarget() { return downtarget_; }
        inline NsObject* uptarget() { return uptarget_; }
    inline ARPTable *arp_table() { return arptable_; }
    
protected:
    int command(int argc, const char*const* argv);
    
    int seqno_;         // link-layer sequence number
    int ackno_;         // ACK received so far
    int macDA_;         // destination MAC address
    
        Queue* ifq_;            // interface queue
    Mac*   mac_;                // MAC object
        LanRouter* lanrouter_;          // for lookups of the next hop
    ARPTable*  arptable_;           // ARP table object
    VARPTable* varp_;               // Virtual ARP object
    
    NsObject* downtarget_;      // for outgoing packet 
    NsObject* uptarget_;        // for incoming packet
        
    
};

#endif

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