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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.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the MASH Research
* Group at the University of California Berkeley.
* 4. Neither the name of the University nor of the Research Group may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#) $Header: /cvsroot/nsnam/ns-2/apps/rtp.h,v 1.14 2000/09/01 03:04:06 haoboy Exp $
*/
#ifndef ns_rtp_h
#define ns_rtp_h
#include "config.h"
#include "object.h"
#include "agent.h"
#include "timer-handler.h"
#define RTP_M 0x0080 // marker for significant events
/* rtp packet. For now, just have srcid + seqno. */
struct hdr_rtp {
u_int32_t srcid_;
int seqno_;
//rtp flags indicating significant event(begining of talkspurt)
u_int16_t flags_;
static int offset_;
inline static int& offset() { return offset_; }
inline static hdr_rtp* access(const Packet* p) {
return (hdr_rtp*) p->access(offset_);
}
/* per-field member functions */
u_int32_t& srcid() { return (srcid_); }
int& seqno() { return (seqno_); }
u_int16_t& flags() { return (flags_); }
};
class RTPSource : public TclObject {
public:
RTPSource* next;
RTPSource(u_int32_t srcid);
inline u_int32_t srcid() { return (srcid_); }
inline int np() { return (np_); }
inline int snp() { return (snp_); }
inline int ehsr() { return (ehsr_); }
inline void np(int n) { np_ += n; }
inline void snp(int n) { snp_ = n; }
inline void ehsr(int n) { ehsr_ = n; }
protected:
u_int32_t srcid_;
int np_;
int snp_;
int ehsr_;
};
class RTPSession : public NsObject {
public:
RTPSession();
~RTPSession();
virtual void recv(Packet* p, Handler*);
virtual void recv_ctrl(Packet* p);
int command(int argc, const char*const* argv);
inline u_int32_t srcid() { return (localsrc_->srcid()); }
int build_report(int bye);
void localsrc_update(int);
protected:
RTPSource* allsrcs_;
RTPSource* localsrc_;
int build_sdes();
int build_bye();
RTPSource* lookup(u_int32_t);
void enter(RTPSource*);
int last_np_;
};
class RTPAgent;
class RTPTimer : public TimerHandler {
public:
RTPTimer(RTPAgent *a) : TimerHandler() { a_ = a; }
protected:
virtual void expire(Event *e);
RTPAgent *a_;
};
class RTPAgent : public Agent {
public:
RTPAgent();
virtual void timeout(int);
virtual void recv(Packet* p, Handler*);
virtual int command(int argc, const char*const* argv);
void advanceby(int delta);
virtual void sendmsg(int nbytes, const char *flags = 0);
protected:
virtual void sendpkt();
virtual void makepkt(Packet*);
void rate_change();
virtual void start();
virtual void stop();
virtual void finish();
RTPSession* session_;
double lastpkttime_;
int seqno_;
int running_;
int random_;
int maxpkts_;
double interval_;
RTPTimer rtp_timer_;
};
#endif
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