NS2.26SourcesOriginal: SensorQueryAgent class Reference

00304                                    : Agent(PT_MESSAGE) { 
00305     query_interval_ = 120;
00306     gen_query_event_ = new Event;
00307     query_handler_ = new SensorQueryHandler(this);
00308     node_dead_ = 0;
00309 }

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 }

00089 {
00090   if (argc == 2)
00091     {
00092       if (strcmp (argv[1], "start") == 0)
00093         {
00094           startUp();
00095           return (TCL_OK);
00096         }
00097       if (strcmp (argv[1], "stop") == 0)
00098         {
00099           stop();
00100           return (TCL_OK);
00101         }
00102       if (strcmp (argv[1], "generate-query") == 0)
00103         {
00104           generate_query(-1,-1,-1);
00105           return (TCL_OK);
00106         }
00107     }
00108   else if (argc == 3)
00109     {
00110       if (strcasecmp (argv[1], "tracetarget") == 0)
00111         {
00112           TclObject *obj;
00113           if ((obj = TclObject::lookup (argv[2])) == 0)
00114             {
00115               fprintf (stderr, "%s: %s lookup of %s failed\n", __FILE__, argv[1],
00116                        argv[2]);
00117               return TCL_ERROR;
00118             }
00119           tracetarget_ = (Trace *) obj;
00120           return TCL_OK;
00121         }
00122       else if (strcasecmp (argv[1], "addr") == 0) {
00123         int temp;
00124         temp = Address::instance().str2addr(argv[2]);
00125         myaddr_ = temp;
00126         return TCL_OK;
00127       }
00128       else if (strcasecmp (argv[1], "attach-tag-dbase") == 0)
00129         {
00130           TclObject *obj;
00131           if ((obj = TclObject::lookup (argv[2])) == 0)
00132             {
00133               fprintf (stderr, "%s: %s lookup of %s failed\n", __FILE__, argv[1],
00134                        argv[2]);
00135               return TCL_ERROR;
00136             }
00137           tag_dbase_ = (tags_database *) obj;
00138           return TCL_OK;
00139         }
00140     }
00141   else if (argc == 5) {
00142     if (strcmp (argv[1], "generate-query") == 0)
00143       {
00144         int p1 = atoi(argv[2]);
00145         int p2 = atoi(argv[3]);
00146         int p3 = atoi(argv[4]);
00147         generate_query(p1,p2,p3);
00148         return (TCL_OK);
00149       }
00150   }
00151   
00152   return (Agent::command (argc, argv));
00153 }

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 }

00181 {
00182   Packet *p = allocpkt();
00183   hdr_ip *iph = HDR_IP(p);
00184   hdr_cmn *hdrc = HDR_CMN(p);
00185   unsigned char *walk;
00186   Scheduler &s = Scheduler::instance();
00187   int obj_name;
00188   int next_hop_level = 0, num_src_hops = 0;
00189   int X = 65000, Y = 65000;
00190   int action = QUERY_PKT;
00191 
00192   if(node_dead_) {
00193     trace("Node %d: node failed, cannot generate query");
00194     return;
00195   }
00196 
00197   // Need to ask our routing module to direct the packet
00198   hdrc->next_hop_ = myaddr_;
00199   hdrc->addr_type_ = NS_AF_INET;
00200   iph->daddr() = myaddr_;
00201   iph->dport() = ROUTER_PORT;
00202   iph->ttl_ = 300;   // since only 300 ids in source route in packet
00203 
00204   iph->saddr() = myaddr_;
00205   iph->sport() = 0;
00206 
00207   // LM agent checks if the source port is 0 to identify a query packet  
00208   // 2 bytes each for X and Y co-ords
00209   // 1 byte for level - used in next hop lookup
00210   // 4 bytes for object name; 2 byte for number of hops in src route
00211   // 4 bytes for origin_time
00212   // 90 bytes to store 30 source route ids and their levels (1 byte each)
00213   // (assuming max_levels = 15) 
00214   p->allocdata(105);
00215   walk = p->accessdata();
00216 
00217   (*walk++) = action & 0xFF;
00218 
00219   // X coord = 65000 initially
00220   (*walk++) = (X >> 8) & 0xFF;
00221   (*walk++) = X & 0xFF;
00222 
00223   // Y coord = 65000 initially
00224   (*walk++) = (Y >> 8) & 0xFF;
00225   (*walk++) = Y & 0xFF;
00226 
00227   // Indicates next hop level
00228   (*walk++) = next_hop_level & 0xFF;
00229 
00230   if(p1 != -1 && p2 != -1 && p3 != -1)
00231     obj_name = (int) ((p1 * pow(2,24)) + (p2 * pow(2,16)) + p3) ;
00232   else
00233     obj_name = tag_dbase_->get_random_tag();
00234 
00235   //  p1 = Random::integer(10);
00236   //  p2 = Random::integer(10);
00237   //  p3 = Random::integer(50);
00238 
00239   (*walk++) = (obj_name >> 24) & 0xFF;
00240   (*walk++) = (obj_name >> 16) & 0xFF;
00241   (*walk++) = (obj_name >> 8) & 0xFF;
00242   (*walk++) = (obj_name) & 0xFF;
00243 
00244   double now = Scheduler::instance().clock();
00245   trace("Node %d: Generating query for object %d.%d.%d at time %f",myaddr_,(obj_name >> 24) & 0xFF,(obj_name >> 16) & 0xFF, obj_name & 0xFFFF,now);
00246   
00247 
00248   int origin_time = (int) now;
00249   (*walk++) = (origin_time >> 24) & 0xFF;
00250   (*walk++) = (origin_time >> 16) & 0xFF;
00251   (*walk++) = (origin_time >> 8) & 0xFF;
00252   (*walk++) = (origin_time) & 0xFF;
00253 
00254   // Number of source route hops in packet (= 0); 2 bytes
00255   (*walk++) = (num_src_hops >> 8) & 0xFF;
00256   (*walk++) = (num_src_hops) & 0xFF;
00257 
00258   // Above fields will be 4 bytes each. 20 bytes for the IP header will be
00259   // added in LM agent. No source route hops on query creation.
00260   hdrc->size_ = 24; 
00261   hdrc->direction() = hdr_cmn::DOWN;
00262 
00263   s.schedule(target_,p,0);
00264   //  double sched_time = CONST_INTERVAL + Random::uniform(query_interval_);
00265   //  trace("Node %d: Scheduling query gen at %f from now %f",myaddr_,sched_time,s.clock());
00266   //  s.schedule(query_handler_, gen_query_event_, sched_time);
00267   //  s.schedule(this, gen_query_event_, Random::uniform(query_interval_));
00268 }

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 }

00274 {
00275   unsigned char *walk = p->accessdata();
00276   int X = 0, Y = 0, obj_name = -1;
00277 
00278   if(node_dead_) {
00279     Packet::free(p);
00280     return;
00281   }
00282 
00283   ++walk;
00284   X = *walk++;
00285   X = (X << 8) | *walk++;
00286 
00287   Y = *walk++;
00288   Y = (Y << 8) | *walk++;
00289   
00290   ++walk;
00291   obj_name = *walk++;
00292   obj_name = (obj_name << 8) | *walk++;
00293   obj_name = (obj_name << 8) | *walk++;
00294   obj_name = (obj_name << 8) | *walk++;
00295 
00296   double now = Scheduler::instance().clock();
00297   trace("Node %d: SensorQueryAgent Found object %d.%d.%d at (%d,%d) at time %f", myaddr_, (obj_name >> 24) & 0xFF, (obj_name >> 16) & 0xFF, obj_name & 0xFFFF,X,Y,now);
00298 
00299   Packet::free(p);
00300 }

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 }

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

00100 { type_ = pkttype; }

00095 { return size_; }

00161 {
00162   //  Scheduler &s = Scheduler::instance();
00163   //  double sched_time = CONST_INTERVAL + Random::uniform(query_interval_);
00164   //  trace("Node %d: Scheduling query gen at %f from now %f",myaddr_,sched_time,s.clock());
00165   //  s.schedule(query_handler_, gen_query_event_, Random::uniform(query_interval_));
00166   trace("Node %d: SensorQueryAgent starting up at time %f",myaddr_,NOW);
00167   node_dead_ = 0;
00168 }

00073 {
00074   trace("Node %d: SensorQueryAgent going down at time %f",myaddr_,NOW);
00075 
00076   // Event id > 0 implies presence on the event queue
00077   if(gen_query_event_->uid_) {
00078     Scheduler &s = Scheduler::instance();
00079     s.cancel(gen_query_event_);
00080   }
00081   node_dead_ = 1;
00082 }

00048 { return target_; }

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 }

00053 {
00054   va_list ap; // Define a variable ap that will refer to each argument in turn
00055 
00056   if (!tracetarget_)
00057     return;
00058 
00059   // Initializes ap to first argument
00060   va_start (ap, fmt); 
00061   // Prints the elements in turn
00062   vsprintf (tracetarget_->buffer (), fmt, ap); 
00063   tracetarget_->dump ();
00064   // Does the necessary clean-up before returning
00065   va_end (ap); 
00066 }


Public Member Functions
	SensorQueryAgent ()
virtual int	command (int argc, const char const argv)
void	trace (char *fmt,...)
void	startUp ()
void	stop ()
void	generate_query (int p1, int p2, int p3)
void	recv (Packet p, Handler )
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	timeout (int tno)
virtual void	sendmsg (int sz, AppData , const char flags=0)
virtual void	sendmsg (int nbytes, 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,...)
Public Attributes
Trace *	tracetarget_
nsaddr_t	myaddr_
double	query_interval_
Event *	gen_query_event_
SensorQueryHandler *	query_handler_
tags_database *	tag_dbase_
int	node_dead_
Protected Member Functions
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
ns_addr_t	here_
ns_addr_t	dst_
int	size_
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_

SensorQueryAgent Class Reference

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Static Protected Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation