NS2.26SourcesOriginal: SA_Agent class Reference

00033                    : Agent(PT_UDP), trafgen_(0), rtd_(0), callback_(0), 
00034     sa_timer_(this), nextPkttime_(-1), running_(0), seqno_(-1)
00035 {
00036         bind_bw("rate_",&rate_);
00037         bind("bucket_",&bucket_);
00038         bind("packetSize_", &size_);
00039 }

00042 {
00043         if (callback_) 
00044                 delete[] callback_;
00045 
00046 }

00327 {
00328         char wrk[256];
00329         int n;
00330         double curTime = (&Scheduler::instance() == NULL ? 0 : 
00331                           Scheduler::instance().clock());
00332         
00333         sprintf(wrk, "a -t "TIME_FORMAT" -s %d -d %d -n %s",
00334                 curTime, here_.addr_, dst_.addr_, name);
00335         n = strlen(wrk);
00336         wrk[n] = '\n';
00337         wrk[n+1] = 0;
00338         if (channel_)
00339                 (void)Tcl_Write(channel_, wrk, n+1);
00340         // keep agent trace name
00341         if (traceName_ != NULL)
00342                 delete[] traceName_;
00343         traceName_ = new char[strlen(name)+1];
00344         strcpy(traceName_, name);
00345 }

00096 { return here_.addr_; }

00518 {
00519         Packet* p = allocpkt();
00520 
00521         if (n > 0)
00522                 p->allocdata(n);
00523 
00524         return(p);
00525 }

00507 {
00508         Packet* p = Packet::alloc();
00509         initpkt(p);
00510         return (p);
00511 }

00373 {
00374         app_ = app;
00375 }

00058 {
00059         Tcl& tcl = Tcl::instance();
00060         if (argc==3) {
00061                 if (strcmp(argv[1], "target") == 0) {
00062                         target_ = (NsObject*)TclObject::lookup(argv[2]);
00063                         if (target_ == 0) {
00064                                 tcl.resultf("no such object %s", argv[2]);
00065                                 return (TCL_ERROR);
00066                         }
00067                         ctrl_target_=target_;
00068                         return (TCL_OK);
00069                 } 
00070                 else if (strcmp(argv[1],"ctrl-target")== 0) {
00071                         ctrl_target_=(NsObject*)TclObject::lookup(argv[2]);
00072                         if (ctrl_target_ == 0) {
00073                                 tcl.resultf("no such object %s", argv[2]);
00074                                 return (TCL_ERROR);
00075                         }
00076                         return (TCL_OK);
00077                 }
00078                 if (strcmp(argv[1], "stoponidle") == 0) {
00079                         stoponidle(argv[2]);
00080                         return(TCL_OK);
00081                 }
00082                 if (strcmp(argv[1], "attach-traffic") == 0) {
00083                         trafgen_ =(TrafficGenerator*)TclObject::lookup(argv[2]);
00084                         if (trafgen_ == 0) {
00085                                 tcl.resultf("no such node %s", argv[2]);
00086                                 return(TCL_ERROR);
00087                         }
00088                         return(TCL_OK);
00089                 }
00090 
00091         }
00092         if (argc == 2) {
00093                 if (strcmp(argv[1], "start") == 0) {
00094                         start();
00095                         return(TCL_OK);
00096                 } else if (strcmp(argv[1], "stop") == 0) {
00097                         stop();
00098                         return(TCL_OK);
00099                 }
00100         }
00101         return (Agent::command(argc,argv));
00102 }

00390 {
00391 /*
00392         dst_ = dst;
00393 */
00394 }

00098 { return dst_.addr_; }

00103 {
00104         if (!debug_)
00105                 return;
00106         va_list ap;
00107         va_start(ap, fmt);
00108         vprintf(fmt, ap);
00109 }

00094 {
00095         if (delay_bind(varName, localName, "agent_addr_", (int*)&(here_.addr_), tracer)) return TCL_OK;
00096         if (delay_bind(varName, localName, "agent_port_", (int*)&(here_.port_), tracer)) return TCL_OK;
00097         if (delay_bind(varName, localName, "dst_addr_", (int*)&(dst_.addr_), tracer)) return TCL_OK;
00098         if (delay_bind(varName, localName, "dst_port_", (int*)&(dst_.port_), tracer)) return TCL_OK;
00099         if (delay_bind(varName, localName, "fid_", (int*)&fid_, tracer)) return TCL_OK;
00100         if (delay_bind(varName, localName, "prio_", (int*)&prio_, tracer)) return TCL_OK;
00101         if (delay_bind(varName, localName, "flags_", (int*)&flags_, tracer)) return TCL_OK;
00102         if (delay_bind(varName, localName, "ttl_", &defttl_, tracer)) return TCL_OK;
00103         if (delay_bind(varName, localName, "class_", (int*)&fid_, tracer)) return TCL_OK;
00104         return Connector::delay_bind_dispatch(varName, localName, tracer);
00105 }

00079 {
00080         delay_bind_init_one("agent_addr_");
00081         delay_bind_init_one("agent_port_");
00082         delay_bind_init_one("dst_addr_");
00083         delay_bind_init_one("dst_port_");
00084         delay_bind_init_one("fid_");
00085         delay_bind_init_one("prio_");
00086         delay_bind_init_one("flags_");
00087         delay_bind_init_one("ttl_");
00088         delay_bind_init_one("class_");
00089         Connector::delay_bind_init_all();
00090 }

00223 {
00224         char wrk[256];
00225 
00226         // XXX we don't know InstVar outside of Tcl! Is there any
00227         // tracedvars hidden in InstVar? If so, shall we have a tclclInt.h?
00228         TracedVar* var = tracedvar_;
00229         for ( ;  var != 0;  var = var->next_) 
00230                 flushAVar(var);
00231 
00232         // we need to flush all var values to trace file, 
00233         // so nam can do backtracing
00234         sprintf(wrk, "a -t "TIME_FORMAT" -s %d -d %d -n %s -x",
00235                 Scheduler::instance().clock(), here_.addr_,
00236                 dst_.addr_, traceName_); 
00237         if (traceName_ != NULL)
00238                 delete[] traceName_;
00239         traceName_ = NULL;
00240 }

00099 { return dst_.port_; }

00115 {
00116         if (drop_ != 0)
00117                 drop_->recv(p, s);
00118         else
00119                 Packet::free(p);
00120 }

00107 {
00108         if (drop_ != 0)
00109                 drop_->recv(p);
00110         else
00111                 Packet::free(p);
00112 }

00101 { return type_; }

00092 {
00093         recv((Packet*)e);
00094 }

00364 {
00365         if (app_)
00366                 app_->resume();
00367 }

00447 {
00448         hdr_cmn* ch = hdr_cmn::access(p);
00449         ch->uid() = uidcnt_++;
00450         ch->ptype() = type_;
00451         ch->size() = size_;
00452         ch->timestamp() = Scheduler::instance().clock();
00453         ch->iface() = UNKN_IFACE.value(); // from packet.h (agent is local)
00454         ch->direction() = hdr_cmn::NONE;
00455 
00456         ch->error() = 0;        /* pkt not corrupt to start with */
00457 
00458         hdr_ip* iph = hdr_ip::access(p);
00459         iph->saddr() = here_.addr_;
00460         iph->sport() = here_.port_;
00461         iph->daddr() = dst_.addr_;
00462         iph->dport() = dst_.port_;
00463         
00464         //DEBUG
00465         //if (dst_ != -1)
00466         //  printf("pl break\n");
00467         
00468         iph->flowid() = fid_;
00469         iph->prio() = prio_;
00470         iph->ttl() = defttl_;
00471 
00472         hdr_flags* hf = hdr_flags::access(p);
00473         hf->ecn_capable_ = 0;
00474         hf->ecn_ = 0;
00475         hf->eln_ = 0;
00476         hf->ecn_to_echo_ = 0;
00477         hf->fs_ = 0;
00478         hf->no_ts_ = 0;
00479         hf->pri_ = 0;
00480         hf->cong_action_ = 0;
00481 #ifdef HAVE_STL
00482 
00483         hdr_nv* nv = hdr_nv::access(p);
00484         if (0)
00485                 printf("Off hdr_nv %d, ip_hdr %d myaddr %ld\n",
00486                        hdr_nv::offset(), hdr_ip::offset(), here_.addr_);
00487         NixNode* pNixNode = NixNode::GetNodeObject(here_.addr_);
00488         if (0)
00489                 printf("Node Object %p\n", pNixNode);
00490         if (pNixNode) { 
00491                 // If we get non-null, indicates nixvector routing in use
00492                 // Delete any left over nv in the packet
00493                 // Get a nixvector to the target (may create new)
00494                 NixVec* pNv = pNixNode->GetNixVector(dst_.addr_);
00495                 pNv->Reset();
00496                 nv->nv() = pNv; // And set the nixvec in the packet
00497                 nv->h_used = 0; // And reset used portion to 0
00498         }
00499 #endif //HAVE_STL
00500 }

00251 {
00252         OldValue *p = new OldValue;
00253         assert(p != NULL);
00254         strncpy(p->val_, value, min(strlen(value)+1, TRACEVAR_MAXVALUELENGTH));
00255         p->var_ = v;
00256         p->next_ = NULL;
00257         if (oldValueList_ == NULL) 
00258                 oldValueList_ = p;
00259         else {
00260                 p->next_ = oldValueList_;
00261                 oldValueList_ = p;
00262         }
00263 }

00061 { return debug_; }

00243 {
00244         OldValue *p = oldValueList_;
00245         while ((p != NULL) && (p->var_ != v))
00246                 p = p->next_;
00247         return p;
00248 }

00311 {
00312         char wrk[256];
00313         int n;
00314         double curTime = (&Scheduler::instance() == NULL ? 0 : 
00315                           Scheduler::instance().clock());
00316         
00317         sprintf(wrk, "v -t "TIME_FORMAT" -e monitor_agent %d %s",
00318                 curTime, here_.addr_, traceName_);
00319         n = strlen(wrk);
00320         wrk[n] = '\n';
00321         wrk[n+1] = 0;
00322         if (channel_)
00323                 (void)Tcl_Write(channel_, wrk, n+1);
00324 }

00097 { return here_.port_; }

00097 {
00098         Packet::free(p);
00099 }

00155 {
00156         hdr_cmn *ch= hdr_cmn::access(p);
00157         hdr_resv *rv=hdr_resv::access(p);
00158         hdr_ip * iph = hdr_ip::access(p);
00159         if ( ch->ptype() == PT_ACCEPT || ch->ptype() == PT_REJECT ) {
00160                 ch->ptype() = PT_CONFIRM;
00161 
00162                 // turn the packet around by swapping src and dst
00163                 // (address and port)
00164                 ns_addr_t tmp;
00165                 tmp = iph->src();
00166                 iph->src() = iph->dst();
00167                 iph->dst() = tmp;
00168                 ctrl_target_->recv(p);
00169         }
00170         
00171         // put an additional check here to see if admission was granted
00172         if (rv->decision()) {
00173                 //printf("Flow %d accepted @ %f\n",iph->flowid(),Scheduler::instance().clock());
00174                 fflush(stdout);
00175                 double t = trafgen_->next_interval(size_);
00176                 running_=1;
00177                 sa_timer_.resched(t);
00178         }
00179         else {
00180                 //printf("Flow %d rejected @ %f\n",iph->flowid(),Scheduler::instance().clock());
00181                 fflush(stdout);
00182                 //Currently the flow is stopped if rejected
00183                 running_=0;
00184         }
00185         //make an upcall to sched a stoptime for this flow from now
00186         Tcl::instance().evalf("%s sched-stop %d",name(),rv->decision());
00187 }

00355 {
00356         if (app_)
00357                 app_->recv(nbytes);     
00358 }

00089 { sendmsg(nbytes); }

00084 { sendmsg(sz, data, 0); }

00080 { target_->recv(p, h); }

00401 {
00402         fprintf(stderr, 
00403         "Agent::sendmsg(int, AppData*, const char*) not implemented\n");
00404         abort();
00405 }

00252 {
00253         Packet *p;
00254         int n;
00255 
00256         if (size_)
00257                 n = nbytes / size_;
00258         else
00259                 printf("Error: SA_Agent size = 0\n");
00260 
00261         if (nbytes == -1) {
00262                 start();
00263                 return;
00264         }
00265         while (n-- > 0) {
00266                 p = allocpkt();
00267                 hdr_rtp* rh = hdr_rtp::access(p);
00268                 rh->seqno() = seqno_;
00269                 target_->recv(p);
00270         }
00271         n = nbytes % size_;
00272         if (n > 0) {
00273                 p = allocpkt();
00274                 hdr_rtp* rh = hdr_rtp::access(p);
00275                 rh->seqno() = seqno_;
00276                 target_->recv(p);
00277         }
00278         idle();
00279 }

00234 {
00235         Packet* p = allocpkt();
00236         hdr_rtp* rh = hdr_rtp::access(p);
00237         rh->seqno() = ++seqno_;
00238         rh->flags()=0;
00239 
00240         double local_time=Scheduler::instance().clock();
00241         /*put in "rtp timestamps" and begining of talkspurt labels */
00242         hdr_cmn* ch = hdr_cmn::access(p);
00243         ch->timestamp()=(u_int32_t)(SAMPLERATE*local_time);
00244         ch->size()=size_;
00245         if ((nextPkttime_ != trafgen_->interval()) || (nextPkttime_ == -1))
00246                 rh->flags() |= RTP_M;
00247 
00248         target_->recv(p);
00249 }

00126 {
00127         Packet *p = allocpkt();
00128         hdr_cmn* ch= hdr_cmn::access(p);
00129         ch->ptype()=PT_REQUEST;
00130         ch->size()=20;
00131         //also put in the r,b parameters for the flow in the packet
00132         hdr_resv* rv=hdr_resv::access(p);
00133         rv->decision() =1;
00134         rv->rate()=rate_;
00135         rv->bucket()=bucket_;
00136         ctrl_target_->recv(p);
00137 }

00140 {
00141         Packet *p = allocpkt();
00142         hdr_cmn* ch= hdr_cmn::access(p);
00143         ch->ptype()=PT_TEARDOWN;
00144         ch->size()=20;
00145         //also put in the r,b parameters for the flow in the packet
00146         hdr_resv* rv=hdr_resv::access(p);
00147         rv->decision() =1;
00148         rv->rate()=rate_;
00149         rv->bucket()=bucket_;
00150         ctrl_target_->recv(p);
00151 }

00409 {
00410         fprintf(stderr, 
00411         "Agent::sendmsg(int, AppData*, const char*) not implemented\n");
00412         abort();
00413 }

00100 { type_ = pkttype; }

00095 { return size_; }

00106 {
00107         //send the request packet
00108         if (trafgen_) {
00109                 trafgen_->init();
00110                 //running_=1;
00111                 sendreq();
00112         }
00113 }

00116 {
00117         sendteardown();
00118         if (running_ != 0) {
00119                 sa_timer_.cancel();
00120                 running_ =0;
00121         }
00122 }

00190 {
00191         callback_ = new char[strlen(s)+1];
00192         strcpy(callback_, s);
00193 
00194         if (trafgen_->on()) {
00195                 // Tcl::instance().evalf("puts \"%s waiting for burst at %f\"", name(), Scheduler::instance().clock());
00196                 rtd_ = 1;
00197         }
00198         else {
00199                 stop();
00200                 Tcl::instance().evalf("%s %s", name(), callback_);
00201         }
00202 
00203 }

00048 { return target_; }

00210 {
00211         if (running_) {
00212                 /* send a packet */
00213                 sendpkt();
00214                 /* figure out when to send the next one */
00215                 nextPkttime_ = trafgen_->next_interval(size_);
00216                 /* schedule it */
00217                 sa_timer_.resched(nextPkttime_);
00218 
00219                 /* hack: if we are waiting for a current burst to end
00220                  * before stopping . . .
00221                  */
00222                 if (rtd_) {
00223                         if (trafgen_->on() == 0) {
00224                                 stop();
00225                                 //Tcl::instance().evalf("puts \"%s burst over at %f\"",
00226                                 // name(), Scheduler::instance().clock());
00227                                 Tcl::instance().evalf("%s sched-stop %d", name(), 0);
00228                         }
00229                 }
00230         }
00231 }

00267 {
00268         if (channel_ == 0)
00269                 return;
00270         char wrk[256], value[128];
00271         int n;
00272 
00273         // XXX we need to keep track of old values. What's the best way?
00274         v->value(value, 128);
00275 
00276         // XXX hack: how do I know ns has not started yet?
00277         // if there's nothing in value, return
00278         static int started = 0;
00279         if (!started) {
00280                 Tcl::instance().evalc("[Simulator instance] is-started");
00281                 if (Tcl::instance().result()[0] == '0')
00282                         // Simulator not started, do nothing
00283                         return;
00284                 // remember for next time (so we don't always have to call to tcl)
00285                 started = 1;
00286         };
00287 
00288         OldValue *ov = lookupOldValue(v);
00289         if (ov != NULL) {
00290                 sprintf(wrk, 
00291                         "f -t "TIME_FORMAT" -s %d -d %d -n %s -a %s -v %s -o %s -T v",
00292                         Scheduler::instance().clock(), here_.addr_,
00293                         dst_.addr_, v->name(), traceName_, value, ov->val_);
00294                 strncpy(ov->val_, 
00295                         value,
00296                         min(strlen(value)+1, TRACEVAR_MAXVALUELENGTH));
00297         } else {
00298                 // if there is value, insert it into old value list
00299                 sprintf(wrk, "f -t "TIME_FORMAT" -s %d -d %d -n %s -a %s -v %s -T v",
00300                         Scheduler::instance().clock(), here_.addr_,
00301                         dst_.addr_, v->name(), traceName_, value);
00302                 insertOldValue(v, value);
00303         }
00304         n = strlen(wrk);
00305         wrk[n] = '\n';
00306         wrk[n+1] = 0;
00307         (void)Tcl_Write(channel_, wrk, n+1);
00308 }


Public Member Functions
	SA_Agent ()
	~SA_Agent ()
int	command (int, const char const )
virtual void	timeout (int)
virtual void	sendmsg (int nbytes, const char *flags=0)
virtual void	recv (Packet p, const char s)
void	recvOnly (Packet *)
void	send (Packet p, Handler h)
virtual void	send (int sz, AppData *data)
virtual void	send (int nbytes)
virtual void	sendmsg (int sz, AppData , const char flags=0)
virtual void	sendto (int sz, AppData , const char flags, nsaddr_t dst)
virtual void	sendto (int nbytes, const char *flags, nsaddr_t dst)
virtual void	connect (nsaddr_t dst)
virtual void	close ()
virtual void	listen ()
virtual void	attachApp (Application *app)
virtual int &	size ()
nsaddr_t &	addr ()
nsaddr_t &	port ()
nsaddr_t &	daddr ()
nsaddr_t &	dport ()
void	set_pkttype (packet_t pkttype)
packet_t	get_pkttype ()
NsObject *	target ()
virtual void	drop (Packet *p)
int	isdebug () const
virtual void	debug (const char *fmt,...)
Protected Member Functions
void	start ()
void	stop ()
void	sendreq ()
void	sendteardown ()
void	recv (Packet , Handler )
void	stoponidle (const char *)
virtual void	sendpkt ()
virtual void	delay_bind_init_all ()
virtual int	delay_bind_dispatch (const char varName, const char localName, TclObject *tracer)
virtual void	recvBytes (int bytes)
virtual void	idle ()
Packet *	allocpkt () const
Packet *	allocpkt (int) const
void	initpkt (Packet *) const
virtual void	trace (TracedVar *v)
void	deleteAgentTrace ()
void	addAgentTrace (const char *name)
void	monitorAgentTrace ()
OldValue *	lookupOldValue (TracedVar *v)
void	insertOldValue (TracedVar v, const char value)
void	dumpTracedVars ()
virtual void	trace_event (char *eventtype)
virtual void	drop (Packet p, const char s)
virtual void	reset ()
void	handle (Event *)
Protected Attributes
double	rate_
int	bucket_
NsObject *	ctrl_target_
TrafficGenerator *	trafgen_
int	rtd_
char *	callback_
SA_Timer	sa_timer_
double	nextPkttime_
int	running_
int	seqno_
int	size_
ns_addr_t	here_
ns_addr_t	dst_
packet_t	type_
int	fid_
int	prio_
int	flags_
int	defttl_
Tcl_Channel	channel_
char *	traceName_
OldValue *	oldValueList_
Application *	app_
EventTrace *	et_
NsObject *	target_
NsObject *	drop_
int	debug_
Static Protected Attributes
int	uidcnt_

SA_Agent Class Reference

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation