ns2 Network Simulator 2.29: SA_Agent Class Reference

00054                    : Agent(PT_UDP), trafgen_(0), rtd_(0), callback_(0), 
00055     sa_timer_(this), nextPkttime_(-1), running_(0), seqno_(-1)
00056 {
00057     bind_bw("rate_",&rate_);
00058     bind("bucket_",&bucket_);
00059     bind("packetSize_", &size_);
00060 }

00063 {
00064         if (callback_) 
00065                 delete[] callback_;
00066 
00067 }

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 }

00099 { return here_.addr_; }

00529 {
00530         Packet* p = allocpkt();
00531 
00532     if (n > 0)
00533             p->allocdata(n);
00534 
00535     return(p);
00536 }

00518 {
00519     Packet* p = Packet::alloc();
00520     initpkt(p);
00521     return (p);
00522 }

00373 {
00374     app_ = app;
00375 }

00079 {
00080     Tcl& tcl = Tcl::instance();
00081     if (argc==3) {
00082         if (strcmp(argv[1], "target") == 0) {
00083             target_ = (NsObject*)TclObject::lookup(argv[2]);
00084             if (target_ == 0) {
00085                 tcl.resultf("no such object %s", argv[2]);
00086                 return (TCL_ERROR);
00087             }
00088             ctrl_target_=target_;
00089             return (TCL_OK);
00090         } 
00091         else if (strcmp(argv[1],"ctrl-target")== 0) {
00092             ctrl_target_=(NsObject*)TclObject::lookup(argv[2]);
00093             if (ctrl_target_ == 0) {
00094                 tcl.resultf("no such object %s", argv[2]);
00095                 return (TCL_ERROR);
00096             }
00097             return (TCL_OK);
00098         }
00099             if (strcmp(argv[1], "stoponidle") == 0) {
00100                 stoponidle(argv[2]);
00101             return(TCL_OK);
00102         }
00103                 if (strcmp(argv[1], "attach-traffic") == 0) {
00104                         trafgen_ =(TrafficGenerator*)TclObject::lookup(argv[2]);
00105                         if (trafgen_ == 0) {
00106                                 tcl.resultf("no such node %s", argv[2]);
00107                                 return(TCL_ERROR);
00108                         }
00109                         return(TCL_OK);
00110                 }
00111 
00112     }
00113         if (argc == 2) {
00114                 if (strcmp(argv[1], "start") == 0) {
00115                         start();
00116                         return(TCL_OK);
00117                 } else if (strcmp(argv[1], "stop") == 0) {
00118                         stop();
00119                         return(TCL_OK);
00120                 }
00121         }
00122     return (Agent::command(argc,argv));
00123 }

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

00101 { 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 }

00102 { 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 }

00104 { return type_; }

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

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

00457 {
00458     hdr_cmn* ch = hdr_cmn::access(p);
00459     ch->uid() = uidcnt_++;
00460     ch->ptype() = type_;
00461     ch->size() = size_;
00462     ch->timestamp() = Scheduler::instance().clock();
00463     ch->iface() = UNKN_IFACE.value(); // from packet.h (agent is local)
00464     ch->direction() = hdr_cmn::NONE;
00465 
00466     ch->error() = 0;    /* pkt not corrupt to start with */
00467 
00468     hdr_ip* iph = hdr_ip::access(p);
00469     iph->saddr() = here_.addr_;
00470     iph->sport() = here_.port_;
00471     iph->daddr() = dst_.addr_;
00472     iph->dport() = dst_.port_;
00473     
00474     //DEBUG
00475     //if (dst_ != -1)
00476     //  printf("pl break\n");
00477     
00478     iph->flowid() = fid_;
00479     iph->prio() = prio_;
00480     iph->ttl() = defttl_;
00481 
00482     hdr_flags* hf = hdr_flags::access(p);
00483     hf->ecn_capable_ = 0;
00484     hf->ecn_ = 0;
00485     hf->eln_ = 0;
00486     hf->ecn_to_echo_ = 0;
00487     hf->fs_ = 0;
00488     hf->no_ts_ = 0;
00489     hf->pri_ = 0;
00490     hf->cong_action_ = 0;
00491     hf->qs_ = 0;
00492 #ifdef HAVE_STL
00493 
00494     hdr_nv* nv = hdr_nv::access(p);
00495     if (0)
00496         printf("Off hdr_nv %d, ip_hdr %d myaddr %d\n",
00497                hdr_nv::offset(), hdr_ip::offset(), here_.addr_);
00498     NixNode* pNixNode = NixNode::GetNodeObject(here_.addr_);
00499     if (0)
00500         printf("Node Object %p\n", pNixNode);
00501     if (pNixNode) { 
00502         // If we get non-null, indicates nixvector routing in use
00503         // Delete any left over nv in the packet
00504         // Get a nixvector to the target (may create new)
00505         NixVec* pNv = pNixNode->GetNixVector(dst_.addr_);
00506         pNv->Reset();
00507         nv->nv() = pNv; // And set the nixvec in the packet
00508         nv->h_used = 0; // And reset used portion to 0
00509     }
00510 #endif //HAVE_STL
00511 }

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 }

00100 { return here_.port_; }

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

00176 {
00177     hdr_cmn *ch= hdr_cmn::access(p);
00178     hdr_resv *rv=hdr_resv::access(p);
00179     hdr_ip * iph = hdr_ip::access(p);
00180     if ( ch->ptype() == PT_ACCEPT || ch->ptype() == PT_REJECT ) {
00181         ch->ptype() = PT_CONFIRM;
00182 
00183         // turn the packet around by swapping src and dst
00184         // (address and port)
00185         ns_addr_t tmp;
00186         tmp = iph->src();
00187         iph->src() = iph->dst();
00188         iph->dst() = tmp;
00189         ctrl_target_->recv(p);
00190     }
00191     
00192     // put an additional check here to see if admission was granted
00193     if (rv->decision()) {
00194         //printf("Flow %d accepted @ %f\n",iph->flowid(),Scheduler::instance().clock());
00195         fflush(stdout);
00196         double t = trafgen_->next_interval(size_);
00197         running_=1;
00198         sa_timer_.resched(t);
00199     }
00200     else {
00201         //printf("Flow %d rejected @ %f\n",iph->flowid(),Scheduler::instance().clock());
00202         fflush(stdout);
00203         //Currently the flow is stopped if rejected
00204         running_=0;
00205     }
00206     //make an upcall to sched a stoptime for this flow from now
00207     Tcl::instance().evalf("%s sched-stop %d",name(),rv->decision());
00208 }

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

00091 { 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 }

00273 {
00274         Packet *p;
00275         int n;
00276 
00277     assert (size_ > 0);
00278 
00279     n = nbytes / size_;
00280 
00281         if (nbytes == -1) {
00282                 start();
00283                 return;
00284         }
00285         while (n-- > 0) {
00286             p = allocpkt();
00287                 hdr_rtp* rh = hdr_rtp::access(p);
00288                 rh->seqno() = seqno_;
00289                 target_->recv(p);
00290         }
00291         n = nbytes % size_;
00292         if (n > 0) {
00293             p = allocpkt();
00294             hdr_rtp* rh = hdr_rtp::access(p);
00295             rh->seqno() = seqno_;
00296             target_->recv(p);
00297         }
00298         idle();
00299 }

00255 {
00256         Packet* p = allocpkt();
00257         hdr_rtp* rh = hdr_rtp::access(p);
00258         rh->seqno() = ++seqno_;
00259         rh->flags()=0;
00260 
00261         double local_time=Scheduler::instance().clock();
00262         /*put in "rtp timestamps" and begining of talkspurt labels */
00263         hdr_cmn* ch = hdr_cmn::access(p);
00264         ch->timestamp()=(u_int32_t)(SAMPLERATE*local_time);
00265         ch->size()=size_;
00266         if ((nextPkttime_ != trafgen_->interval()) || (nextPkttime_ == -1))
00267                 rh->flags() |= RTP_M;
00268 
00269         target_->recv(p);
00270 }

00147 {
00148     Packet *p = allocpkt();
00149     hdr_cmn* ch= hdr_cmn::access(p);
00150     ch->ptype()=PT_REQUEST;
00151     ch->size()=20;
00152     //also put in the r,b parameters for the flow in the packet
00153     hdr_resv* rv=hdr_resv::access(p);
00154     rv->decision() =1;
00155     rv->rate()=rate_;
00156     rv->bucket()=bucket_;
00157     ctrl_target_->recv(p);
00158 }

00161 {
00162     Packet *p = allocpkt();
00163     hdr_cmn* ch= hdr_cmn::access(p);
00164     ch->ptype()=PT_TEARDOWN;
00165     ch->size()=20;
00166     //also put in the r,b parameters for the flow in the packet
00167     hdr_resv* rv=hdr_resv::access(p);
00168     rv->decision() =1;
00169     rv->rate()=rate_;
00170     rv->bucket()=bucket_;
00171     ctrl_target_->recv(p);
00172 }

00413 {
00414     fprintf(stderr, 
00415     "Agent::sendmsg(int, AppData*, const char*) not implemented\n");
00416     abort();
00417 }

00103 { type_ = pkttype; }

00051 {drop_ = dt; }

00098 { return size_; }

00127 {
00128     //send the request packet
00129     if (trafgen_) {
00130         trafgen_->init();
00131         //running_=1;
00132         sendreq();
00133     }
00134 }

00137 {
00138     sendteardown();
00139     if (running_ != 0) {
00140         sa_timer_.cancel();
00141         running_ =0;
00142     }
00143 }

00211 {
00212         callback_ = new char[strlen(s)+1];
00213         strcpy(callback_, s);
00214 
00215         if (trafgen_->on()) {
00216                 // Tcl::instance().evalf("puts \"%s waiting for burst at %f\"", name(), Scheduler::instance().clock());
00217                 rtd_ = 1;
00218         }
00219         else {
00220                 stop();
00221                 Tcl::instance().evalf("%s %s", name(), callback_);
00222         }
00223 
00224 }

00049 { target_ = target; }

00048 { return target_; }

00231 {
00232         if (running_) {
00233                 /* send a packet */
00234                 sendpkt();
00235                 /* figure out when to send the next one */
00236                 nextPkttime_ = trafgen_->next_interval(size_);
00237                 /* schedule it */
00238                 sa_timer_.resched(nextPkttime_);
00239 
00240                 /* hack: if we are waiting for a current burst to end
00241                  * before stopping . . .
00242                  */
00243                 if (rtd_) {
00244                         if (trafgen_->on() == 0) {
00245                                 stop();
00246                                 //Tcl::instance().evalf("puts \"%s burst over at %f\"",
00247                                 // name(), Scheduler::instance().clock());
00248                                 Tcl::instance().evalf("%s sched-stop %d", name(), 0);
00249                         }
00250                 }
00251         }
00252 }

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

SA_Agent Class Reference

Detailed Description

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation