NS2.26SourcesOriginal: TapAgent class Reference

00049                    : Agent(PT_LIVE), net_(NULL)
00050 {
00051         bind("maxpkt_", &maxpkt_);
00052 }

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 }

00105 {
00106         Tcl& tcl = Tcl::instance();
00107 
00108         if (argc == 2) {
00109                 if (strcmp(argv[1], "network") == 0) {
00110                         tcl.result(name());
00111                         return(TCL_OK);
00112                 } 
00113         }
00114         if (argc == 3) {
00115                 if (strcmp(argv[1], "network") == 0) {
00116                         net_ = (Network *)TclObject::lookup(argv[2]);
00117                         if (net_ != 0) {
00118                                 return(linknet());
00119                         } else {
00120                                 fprintf(stderr,
00121                                 "TapAgent(%s): unknown network %s\n",
00122                                     name(), argv[2]);
00123                                 return (TCL_ERROR);
00124                         }
00125                         return(TCL_OK);
00126                 }       
00127         }
00128         return (Agent::command(argc, argv));
00129 }

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 }

00201 {
00202         /*
00203          * Just process one packet.  We could put a loop here
00204          * but instead we allow the dispatcher to call us back
00205          * if there is a queue in the socket buffer; this allows
00206          * other events to get a chance to slip in...
00207          */
00208 #ifdef notdef
00209 Scheduler::instance().sync();   // sim clock gets set to now
00210 #endif
00211         recvpkt();
00212 }

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_; }

00059 {
00060         int mode = net_->mode();
00061         int rchan = net_->rchannel();
00062         int wchan = net_->schannel();
00063 
00064         unlink();
00065         if (mode == O_RDONLY || mode == O_RDWR) {
00066                 // reading enabled?
00067                 if (rchan < 0) {
00068                         fprintf(stderr,
00069                 "TapAgent(%s): network %s not open for reading (mode:%d)\n",
00070                             name(), net_->name(), mode);
00071                         return (TCL_ERROR);
00072                 }
00073                 link(rchan, TCL_READABLE);
00074                 TDEBUG3("TapAgent(%s): linked sock %d as READABLE\n",
00075                         name(), rchan);
00076         } else if (mode != O_WRONLY) {
00077                 if (mode == -1) {
00078                         fprintf(stderr,
00079                            "TapAgent(%s): Network(%s) not opened properly.\n",
00080                                 name(), net_->name());
00081                         fprintf(stderr,
00082                            "(choose: readonly, readwrite, or writeonly)\n");
00083                 } else {
00084                         fprintf(stderr,
00085                             "TapAgent(%s): unknown mode %d in Network(%s)\n",
00086                                 name(), mode, net_->name());
00087                 }
00088                 return (TCL_ERROR);
00089         }
00090 
00091         if (mode == O_WRONLY || mode == O_RDWR) {
00092                 // writing enabled?
00093                 if (wchan < 0) {
00094                         fprintf(stderr,
00095                         "TapAgent(%s): network %s not open for writing\n",
00096                             name(), net_->name());
00097                         return (TCL_ERROR);
00098                 }
00099         }
00100         return (TCL_OK);
00101 }

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 }

00076 { return Scheduler::instance().clock(); }

00097 { return here_.port_; }

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

00224 {
00225         (void) sendpkt(p);
00226         Packet::free(p);
00227         return;
00228 }

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

00136 {
00137 
00138         if (net_->mode() != O_RDWR && net_->mode() != O_RDONLY) {
00139                 fprintf(stderr,
00140                   "TapAgent(%s): recvpkt called while in write-only mode!\n",
00141                   name());
00142                 return;
00143         }
00144 
00145         if (maxpkt_ <= 0) {
00146                 fprintf(stderr,
00147                   "TapAgent(%s): recvpkt: maxpkt_ value too low (%d)\n",
00148                   name(), maxpkt_);
00149                 return;
00150         }
00151 
00152         // allocate packet and a data payload
00153         Packet* p = allocpkt(maxpkt_);
00154 
00155         // fill up payload
00156         sockaddr addr;  // not really used (yet)
00157         double tstamp;
00158         int cc = net_->recv(p->accessdata(), maxpkt_, addr, tstamp);
00159         if (cc <= 0) {
00160                 if (cc < 0) {
00161                         perror("recv");
00162                 }
00163                 Packet::free(p);
00164                 return;
00165         }
00166 
00167         TDEBUG4("%f: Tap(%s): recvpkt, cc:%d\n", now(), name(), cc);
00168 
00169         // inject into simulator
00170         hdr_cmn* ch = HDR_CMN(p);
00171         ch->size() = cc;
00172 
00173         /*
00174          * if the time-stamp on the pkt is sufficiently far in the future,
00175          * put it in the scheduler instead of forwarding it immediately.
00176          * This can happen if we are pulling packet from a trace file
00177          * and we don't want them to be dispatched until later
00178          *
00179          * this agent assumes that the time stamps are in absolute
00180          * time, so adjust it to relative time here
00181          */
00182 
00183         double when = tstamp - now();
00184 
00185         if (when > 0.0) {
00186                 TDEBUG5("%f: Tap(%s): DEFERRED PACKET %f secs, uid: %d\n",
00187                         now(), name(), when, p->uid_);
00188                 ch->timestamp() = when;
00189                 Scheduler::instance().schedule(target_, p, when);
00190         } else {
00191                 TDEBUG4("%f: Tap(%s): recvpkt, writing to target: %s\n",
00192                         now(), name(), target_->name());
00193                 ch->timestamp() = now();
00194                 target_->recv(p);
00195         }
00196         return;
00197 }

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 }

00232 {
00233         if (net_->mode() != O_RDWR && net_->mode() != O_WRONLY) {
00234                 fprintf(stderr,
00235                     "TapAgent(%s): sendpkt called while in read-only mode!\n",
00236                     name());
00237                 return (-1);
00238         }
00239 
00240         // send packet into the live network
00241         hdr_cmn* hc = HDR_CMN(p);
00242         if (net_ == NULL) {
00243                 fprintf(stderr,
00244                  "TapAgent(%s): sendpkt attempted with NULL net\n",
00245                  name());
00246                 drop(p);
00247                 return (-1);
00248         }
00249         if (net_->send(p->accessdata(), hc->size()) < 0) {
00250                 fprintf(stderr,
00251                     "TapAgent(%s): sendpkt (%p, %d): %s\n",
00252                     name(), p->accessdata(), hc->size(), strerror(errno));
00253                 return (-1);
00254                         
00255         }
00256         TDEBUG3("TapAgent(%s): sent packet (sz: %d)\n",
00257                 name(), hc->size());
00258         return 0;
00259 }

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

00100 { type_ = pkttype; }

00095 { return size_; }

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 }


Public Member Functions
	TapAgent ()
int	command (int, const char const )
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,...)
Protected Member Functions
void	dispatch (int)
int	linknet ()
double	now ()
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
int	maxpkt_
Network *	net_
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_
Private Member Functions
virtual int	sendpkt (Packet *)
virtual void	recvpkt ()

TapAgent Class Reference

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Private Member Functions

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation