packmime_OL.cc
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- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * Copyright 2002, Statistics Research, Bell Labs, Lucent Technologies and
- * The University of North Carolina at Chapel Hill
- *
- * 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. The name of the author may not be used to endorse or promote
- * products derived from this software without specific prior written
- * permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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)
- * 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.
- */
- /*
- * Reference
- * Stochastic Models for Generating Synthetic HTTP Source Traffic
- * J. Cao, W.S. Cleveland, Y. Gao, K. Jeffay, F.D. Smith, and M.C. Weigle
- * IEEE INFOCOM 2004.
- *
- * Documentation available at http://dirt.cs.unc.edu/packmime/
- *
- * Contacts: Michele Weigle (mcweigle@cs.unc.edu),
- * Kevin Jeffay (jeffay@cs.unc.edu)
- */
- /*
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <math.h>
- #include "config.h"
- #include "random.h"
- #include "trafgen.h"
- #include "ranvar.h"
- */
- #include "packmime_OL.h"
- #include "packmime_ranvar.h"
- /*
- * Constant bit rate traffic source. Parameterized by interval, (optional)
- * random noise in the interval, and packet size.
- */
- /*
- class PackMimeOpenLoop : public TrafficGenerator {
- public:
- PackMimeOpenLoop();
- virtual double next_interval(int&);
- //HACK so that udp agent knows interpacket arrival time within a burst
- int command(int argc, const char*const* argv);
-
-
- protected:
- virtual void start();
- void init();
- int size_;
- int seqno_;
- int64_t maxpkts_;
-
- // statistics objects
- RandomVariable* pm_pac_ia_;
- RandomVariable* pm_pac_size_;
- // helper methods
- TclObject* lookup_obj(const char* name) {
- TclObject* obj = Tcl::instance().lookup(name);
- if (obj == NULL)
- fprintf(stderr, "Bad object name %sn", name);
- return obj;
- }
- inline int lookup_rv (RandomVariable*& rv, const char* name) {
- if (rv != NULL)
- Tcl::instance().evalf ("delete %s", rv->name());
- rv = (RandomVariable*) lookup_obj (name);
- return rv ? (TCL_OK) : (TCL_ERROR);
- }
- };
- */
- static class PackMimeOpenLoopClass : public TclClass {
- public:
- PackMimeOpenLoopClass() : TclClass("Application/Traffic/PackMimeOpenLoop") {}
- TclObject* create(int, const char*const*) {
- return (new PackMimeOpenLoop());
- }
- } class_bl_traffic;
- PackMimeOpenLoop::PackMimeOpenLoop() : size_(40), seqno_(0), maxpkts_(0),
- pm_pac_ia_(NULL), pm_pac_size_(NULL)
- {
- bind("maxpkts_", &maxpkts_);
- }
- void PackMimeOpenLoop::init()
- {
- if (agent_)
- agent_->set_pkttype(PT_BLTRACE);
- else
- printf("no agent_n");
-
- return;
- }
- void PackMimeOpenLoop::start()
- {
- init();
-
- if (!pm_pac_ia_ || !pm_pac_size_) {
- fprintf(stderr, "Random variables are not set up yet!n");
- return;
- }
- running_ = 1;
- nextPkttime_ = next_interval(size_);
- timer_.resched(nextPkttime_);
-
- return;
- }
- double PackMimeOpenLoop::next_interval(int& size)
- {
- double t = 1;
-
- size = (int)pm_pac_size_->value(); // current packet size
- assert(size>=40);
- size -= 28; // length of IP + UDP header
- t = pm_pac_ia_->value(); // time to next packet arrival
-
- if ((++seqno_ < maxpkts_) || (maxpkts_ <= 0))
- return(t);
- else
- return(-1);
- }
- int PackMimeOpenLoop::command(int argc, const char*const* argv)
- {
- if (argc == 3) {
- if (strcmp (argv[1], "set-pac-size") == 0) {
- int res = lookup_rv (pm_pac_size_, argv[2]);
- if (res == TCL_ERROR) {
- delete pm_pac_size_;
- fprintf (stderr, "Invalid packet size random variablen");
- return (TCL_ERROR);
- }
- return (TCL_OK);
- }
- else if (strcmp (argv[1], "set-pac-ia") == 0) {
- int res = lookup_rv (pm_pac_ia_, argv[2]);
- if (res == TCL_ERROR) {
- delete pm_pac_ia_;
- fprintf (stderr,"Invalid packet arrive random variablen");
- return (TCL_ERROR);
- }
- return (TCL_OK);
- }
- } else if (argc == 2) {
- if (strcmp(argv[1], "start") == 0) {
- start();
- return(TCL_OK);
- }
- }
- return (Application::command(argc, argv));
- }