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/*
* mac-simple.h
* Copyright (C) 2003 by the University of Southern California
* $Id: mac-simple.h,v 1.6 2005/08/25 18:58:07 johnh Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module with free software programs or
* libraries that are released under the GNU LGPL and with code
* included in the standard release of ns-2 under the Apache 2.0
* license or under otherwise-compatible licenses with advertising
* requirements (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for this module and the licenses of the
* other code concerned, provided that you include the source code of
* that other code when and as the GNU GPL requires distribution of
* source code.
*
* Note that people who make modified versions of this module
* are not obligated to grant this special exception for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*
*/
#ifndef ns_mac_simple_h
#define ns_mac_simple_h
// Added by Sushmita to support event tracing (singal@nunki.usc.edu)
#include "address.h"
#include "ip.h"
class MacSimpleWaitTimer;
class MacSimpleSendTimer;
class MacSimpleRecvTimer;
// Added by Sushmita to support event tracing (singal@nunki.usc.edu)
class EventTrace;
class MacSimple : public Mac {
//Added by Sushmita to support backoff
friend class BackoffTimer;
public:
MacSimple();
void recv(Packet *p, Handler *h);
void send(Packet *p, Handler *h);
void waitHandler(void);
void sendHandler(void);
void recvHandler(void);
double txtime(Packet *p);
// Added by Sushmita to support event tracing (singal@nunki.usc.edu)
void trace_event(char *, Packet *);
int command(int, const char*const*);
EventTrace *et_;
private:
Packet * pktRx_;
Packet * pktTx_;
MacState rx_state_; // incoming state (MAC_RECV or MAC_IDLE)
MacState tx_state_; // outgoing state
int tx_active_;
int fullduplex_mode_;
Handler * txHandler_;
MacSimpleWaitTimer *waitTimer;
MacSimpleSendTimer *sendTimer;
MacSimpleRecvTimer *recvTimer;
int busy_ ;
};
class MacSimpleTimer: public Handler {
public:
MacSimpleTimer(MacSimple* m) : mac(m) {
busy_ = 0;
}
virtual void handle(Event *e) = 0;
virtual void restart(double time);
virtual void start(double time);
virtual void stop(void);
inline int busy(void) { return busy_; }
inline double expire(void) {
return ((stime + rtime) - Scheduler::instance().clock());
}
protected:
MacSimple *mac;
int busy_;
Event intr;
double stime;
double rtime;
double slottime;
};
// Timer to use for delaying the sending of packets
class MacSimpleWaitTimer: public MacSimpleTimer {
public: MacSimpleWaitTimer(MacSimple *m) : MacSimpleTimer(m) {}
void handle(Event *e);
};
// Timer to use for finishing sending of packets
class MacSimpleSendTimer: public MacSimpleTimer {
public:
MacSimpleSendTimer(MacSimple *m) : MacSimpleTimer(m) {}
void handle(Event *e);
};
// Timer to use for finishing reception of packets
class MacSimpleRecvTimer: public MacSimpleTimer {
public:
MacSimpleRecvTimer(MacSimple *m) : MacSimpleTimer(m) {}
void handle(Event *e);
};
#endif
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