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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* logweb.cc
* Copyright (C) 2001 by the University of Southern California
* $Id: logweb.cc,v 1.8 2011/10/02 22:32:35 tom_henderson 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.
*
*/
//
// Generate web traffic based on HTTP log
// Xuan Chen (xuanc@isi.edu)
//
#include <tclcl.h>
#include "logweb.h"
// Timer to send requests
RequestTimer::RequestTimer(LogWebTrafPool* pool) {
lwp = pool;
}
void RequestTimer::expire(Event *) {
//if (e)
// Packet::free((Packet *)e);
lwp->run();
}
static class LogWebTrafPoolClass : public TclClass {
public:
LogWebTrafPoolClass() : TclClass("PagePool/WebTraf/Log") {}
TclObject* create(int, const char*const*) {
return (new LogWebTrafPool());
}
} class_logwebtrafpool;
LogWebTrafPool::LogWebTrafPool() {
num_obj = 0;
// initialize next request
next_req.time = 0;
next_req.client = 0;
next_req.server = 0;
next_req.size = 0;
// initialize request timer
req_timer = new RequestTimer(this);
start_t = 0;
}
LogWebTrafPool::~LogWebTrafPool() {
if (fp)
fclose(fp);
if (req_timer) delete req_timer;
}
int LogWebTrafPool::loadLog(const char* filename) {
fp = fopen(filename, "r");
if (fp == 0)
return(0);
return(1);
}
int LogWebTrafPool::start() {
start_t = Scheduler::instance().clock();
processLog();
return(1);
}
int LogWebTrafPool::processLog() {
int time, client, server, size;
if (!feof(fp)) {
fscanf(fp, "%d %d %d %d\n", &time, &client, &server, &size);
// save information for next request
next_req.time = time;
next_req.client = client;
next_req.server = server;
next_req.size = size;
double now = Scheduler::instance().clock();
double delay = time + start_t - now;
req_timer->resched(delay);
return(1);
} else
return(0);
}
int LogWebTrafPool::run() {
launchReq(next_req.client, next_req.server, next_req.size);
processLog();
return(1);
}
Node* LogWebTrafPool::picksrc(int id) {
int n = id % nClient_;
assert((n >= 0) && (n < nClient_));
return client_[n];
}
Node* LogWebTrafPool::pickdst(int id) {
int n = id % nServer_;
assert((n >= 0) && (n < nServer_));
return server_[n].get_node();
}
int LogWebTrafPool::launchReq(int cid, int sid, int size) {
TcpAgent *tcp;
Agent *snk;
// Allocation new TCP connections for both directions
pick_ep(&tcp, &snk);
// pick client and server nodes
Node* client = picksrc(cid);
Node* server = pickdst(sid);
int num_pkt = size / 1000 + 1;
// Setup TCP connection and done
Tcl::instance().evalf("%s launch-req %d %d %s %s %s %s %d %d",
name(), num_obj, num_obj + 1,
client->name(), server->name(),
tcp->name(), snk->name(), num_pkt, NULL);
return(1);
}
int LogWebTrafPool::command(int argc, const char*const* argv) {
if (argc == 2) {
if (strcmp(argv[1], "start") == 0) {
if (start())
return (TCL_OK);
else
return (TCL_ERROR);
}
} else if (argc == 3) {
if (strcmp(argv[1], "loadLog") == 0) {
if (loadLog(argv[2]))
return (TCL_OK);
else
return (TCL_ERROR);
} else if (strcmp(argv[1], "doneObj") == 0) {
return (TCL_OK);
}
}
return WebTrafPool::command(argc, argv);
}
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