empweb.h
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:7k
- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * empweb.h
- * Copyright (C) 2001 by the University of Southern California
- * $Id: empweb.h,v 1.19 2005/08/25 18:58:05 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.
- *
- */
- //
- // Empirical Web traffic model that simulates Web traffic based on a set of
- // CDF (Cumulative Distribution Function) data derived from live tcpdump trace
- // The structure of this file is largely borrowed from webtraf.h
- //
- // $Header: /cvsroot/nsnam/ns-2/empweb/empweb.h,v 1.19 2005/08/25 18:58:05 johnh Exp $
- #ifndef ns_empweb_h
- #define ns_empweb_h
- #include "ranvar.h"
- #include "random.h"
- #include "timer-handler.h"
- #include "lib/bsd-list.h"
- #include "node.h"
- #include "tcp.h"
- #include "tcp-sink.h"
- #include "persconn.h"
- const int WEBTRAF_DEFAULT_OBJ_PER_PAGE = 1;
- class EmpWebTrafPool;
- class EmpWebTrafSession : public TimerHandler {
- public:
- EmpWebTrafSession(EmpWebTrafPool *mgr, Node *src, int np, int id, int connNum, int cl, int ftcp_) :
- rvInterPage_(NULL), rvPageSize_(NULL),
- rvInterObj_(NULL), rvObjSize_(NULL),
- rvReqSize_(NULL), rvPersistSel_(NULL), rvServerSel_(NULL),
- rvServerWin_(NULL), rvClientWin_(NULL),
- rvMtu_(NULL),
- mgr_(mgr), src_(src), nPage_(np), curPage_(0), donePage_(0),
- id_(id), clientIdx_(cl), fulltcp_(0), interPageOption_(1) {
- fulltcp_ = ftcp_;
- }
- virtual ~EmpWebTrafSession();
- // Queried by individual pages/objects
- inline EmpiricalRandomVariable*& interPage() { return rvInterPage_; }
- inline EmpiricalRandomVariable*& pageSize() { return rvPageSize_; }
- inline EmpiricalRandomVariable*& interObj() { return rvInterObj_; }
- inline EmpiricalRandomVariable*& objSize() { return rvObjSize_; }
- inline EmpiricalRandomVariable*& reqSize() { return rvReqSize_; }
- inline EmpiricalRandomVariable*& persistSel() { return rvPersistSel_; }
- inline EmpiricalRandomVariable*& serverSel() { return rvServerSel_; }
- inline EmpiricalRandomVariable*& serverWin() { return rvServerWin_; }
- inline EmpiricalRandomVariable*& clientWin() { return rvClientWin_; }
- inline EmpiricalRandomVariable*& mtu() { return rvMtu_; }
- void donePage(void* ClntData);
- void launchReq(void* ClntData, int obj, int size, int reqSize, int sid, int p);
- inline int id() const { return id_; }
- inline EmpWebTrafPool* mgr() { return mgr_; }
- inline void set_interPageOption(int option) { interPageOption_ = option; }
-
- static int LASTPAGE_;
- private:
- virtual void expire(Event *e = 0);
- virtual void handle(Event *e);
- EmpiricalRandomVariable *rvInterPage_, *rvPageSize_, *rvInterObj_, *rvObjSize_;
- EmpiricalRandomVariable *rvReqSize_, *rvPersistSel_, *rvServerSel_;
- EmpiricalRandomVariable *rvServerWin_, *rvClientWin_;
- EmpiricalRandomVariable *rvMtu_;
- EmpWebTrafPool* mgr_;
- Node* src_; // One Web client (source of request) per session
- int nPage_, curPage_, donePage_;
- int id_;
- int clientIdx_;
- int fulltcp_;
- int interPageOption_;
- TcpAgent* ctcp_;
- TcpAgent* stcp_;
- TcpSink* csnk_;
- TcpSink* ssnk_;
- };
- class EmpWebTrafPool : public PagePool {
- public:
- EmpWebTrafPool();
- virtual ~EmpWebTrafPool();
- inline void startSession() {
- concurrentSess_++;
- if (isdebug())
- printf("concurrent number of sessions = %d n", concurrentSess_ );
- }
- inline void doneSession(int idx) {
- assert((idx>=0) && (idx<nSession_) && (session_[idx]!=NULL));
- if (concurrentSess_ > 0) concurrentSess_--;
- if (isdebug()) {
- printf("deleted session %d n", idx );
- printf("concurrent number of sessions = %d n", concurrentSess_ );
- }
- delete session_[idx];
- session_[idx] = NULL;
- }
- void recycleTcp(Agent* a);
- void recycleSink(Agent* a);
- TcpAgent* picktcp(int size, int mtu);
- TcpSink* picksink();
- inline int nTcp() { return nTcp_; }
- inline int nSink() { return nSink_; }
- inline int isdebug() { return debug_; }
- virtual void delay_bind_init_all();
- virtual int delay_bind_dispatch(const char*, const char*, TclObject*);
- int nSrcL_;
- int nClientL_;
- int concurrentSess_;
- int color_;
- static int LASTFLOW_;
- int nSrc_;
- Node** server_; /* Web servers */
- protected:
- virtual int command(int argc, const char*const* argv);
- // Session management: fixed number of sessions, fixed number
- // of pages per session
- int nSession_;
- EmpWebTrafSession** session_;
- int nClient_;
- Node** client_; /* Browsers */
- // TCP agent pool management
- struct AgentListElem {
- AgentListElem(Agent* a) : agt_(a) {
- link.le_next = NULL;
- link.le_prev = NULL;
- }
- Agent* agt_;
- LIST_ENTRY(AgentListElem) link;
- };
- LIST_HEAD(AgentList, AgentListElem);
- inline void insertAgent(AgentList* l, Agent *a) {
- AgentListElem *e = new AgentListElem(a);
- LIST_INSERT_HEAD(l, e, link);
- }
- inline Agent* detachHead(AgentList* l) {
- AgentListElem *e = l->lh_first;
- if (e == NULL)
- return NULL;
- Agent *a = e->agt_;
- LIST_REMOVE(e, link);
- delete e;
- return a;
- }
- int nTcp_, nSink_;
- AgentList tcpPool_; /* TCP agent pool */
- AgentList sinkPool_; /* TCP sink pool */
- // Helper methods
- inline int lookup_rv(EmpiricalRandomVariable*& rv, const char* name) {
- if (rv != NULL)
- Tcl::instance().evalf("delete %s", rv->name());
- rv = (EmpiricalRandomVariable*)lookup_obj(name);
- return rv ? (TCL_OK) : (TCL_ERROR);
- }
- int debug_;
- int fulltcp_;
- };
- #endif // ns_empweb_h