source/diameter.comm/ServerSession.cpp

   1 // ANNA - Anna is Not Nothingness Anymore                                                         //
   2 //                                                                                                //
   3 // (c) Copyright 2005-2015 Eduardo Ramos Testillano & Francisco Ruiz Rayo                         //
   4 //                                                                                                //
   5 // See project site at http://redmine.teslayout.com/projects/anna-suite                           //
   6 // See accompanying file LICENSE or copy at http://www.teslayout.com/projects/public/anna.LICENSE //
   7
   8
   9 #include <anna/core/functions.hpp>
  10 #include <anna/diameter/defines.hpp>
  11 #include <anna/diameter/functions.hpp>
  12 #include <anna/diameter/helpers/helpers.hpp>
  13 #include <anna/diameter/codec/functions.hpp>
  14 #include <anna/diameter/codec/Message.hpp>
  15 #include <anna/diameter/helpers/base/functions.hpp>
  16 #include <anna/time/functions.hpp>
  17
  18 // Local
  19 #include <anna/diameter.comm/ServerSession.hpp>
  20 #include <anna/diameter.comm/Engine.hpp>
  21 #include <anna/diameter.comm/Entity.hpp>
  22 #include <anna/diameter.comm/Response.hpp>
  23 #include <anna/diameter.comm/Message.hpp>
  24 #include <anna/diameter.comm/OamModule.hpp>
  25 #include <anna/diameter.comm/ApplicationMessageOamModule.hpp>
  26 #include <anna/diameter.comm/TimerManager.hpp>
  27 #include <anna/diameter.comm/Timer.hpp>
  28 #include <anna/diameter.comm/LocalServer.hpp>
  29 #include <anna/diameter.comm/ServerSessionReceiver.hpp>
  30 #include <anna/diameter.comm/ReceiverFactoryImpl.hpp>
  31
  32 #include <anna/app/functions.hpp>
  33 #include <anna/comm/ClientSocket.hpp>
  34 #include <anna/core/functions.hpp>
  35 #include <anna/core/DataBlock.hpp>
  36 #include <anna/core/tracing/Logger.hpp>
  37 #include <anna/core/tracing/TraceMethod.hpp>
  38 #include <anna/xml/Node.hpp>
  39 #include <anna/timex/Engine.hpp>
  40
  41 // Standard
  42 #include <stdlib.h> // rand()
  43 #include <time.h>
  44
  45
  46
  47 using namespace std;
  48 using namespace anna::diameter;
  49 using namespace anna::diameter::comm;
  50
  51 //static
  52 const anna::Millisecond ServerSession::DefaultAllowedInactivityTime(90000); // Inactivity timeout
  53
  54
  55 ServerSession::ServerSession() : Session("diameter::comm::ServerSession", "Diameter Inactivity Detection Timer"),
  56   a_receiverFactory(this),
  57   a_cer(ClassCode::Bind),
  58   a_dwr(ClassCode::ApplicationMessage) // realmente no es necesario, los Message son por defecto de aplicacion
  59 { initialize(); }
  60
  61 void ServerSession::initialize() throw() {
  62   Session::initialize();
  63   a_parent = NULL;
  64   a_clientSocket = NULL;
  65   a_deprecated = false; // selected for remove (server session was lost due to event break connection)
  66 }
  67
  68 //ServerSession::~ServerSession() {;}
  69
  70 void ServerSession::setClientSocket(anna::comm::ClientSocket *clientSocket) throw() {
  71   a_clientSocket = clientSocket;
  72   a_clientSocket->setReceiverFactory(a_receiverFactory);
  73 }
  74
  75
  76 const std::string& ServerSession::getAddress() const throw() {
  77   return a_parent->getKey().first;
  78 }
  79
  80 int ServerSession::getPort() const throw() {
  81   return a_parent->getKey().second;
  82 }
  83
  84
  85 const Response* ServerSession::send(const Message* message) throw(anna::RuntimeException) {
  86   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "send", ANNA_FILE_LOCATION));
  87
  88   if(!message)
  89     throw anna::RuntimeException("Cannot send a NULL message", ANNA_FILE_LOCATION);
  90
  91   // Command id:
  92   bool isRequest;
  93   diameter::CommandId cid = message->getCommandId(isRequest);
  94   diameter::ApplicationId aid = message->getApplicationId();
  95
  96   LOGDEBUG(
  97     std::string msg = "Sending diameter message: ";
  98     msg += anna::diameter::functions::commandIdAsPairString(cid);
  99     anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 100   );
 101
 102   // Checkings:
 103   if(a_deprecated) {
 104     string msg(asString());
 105     msg += " | ServerSession is deprecated and will be erased";
 106     throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 107   }
 108
 109   if((a_state == State::Closed) && (cid != helpers::base::COMMANDID__Capabilities_Exchange_Answer)) {
 110     string msg(asString());
 111     msg += " | ServerSession is not bound";
 112     throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 113   }
 114
 115   // CER/DWR are not sent from server-side:
 116   if(cid == helpers::base::COMMANDID__Capabilities_Exchange_Request) {
 117     string msg(asString());
 118     msg += " | Trying to send CER: unexpected message from server-side";
 119     throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 120   }
 121
 122   if(cid == helpers::base::COMMANDID__Device_Watchdog_Request) {
 123     string msg(asString());
 124     msg += " | Trying to send DWR: unexpected message from server-side";
 125     throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 126   }
 127
 128   // Check states:
 129   /*if (cid == helpers::base::COMMANDID__Capabilities_Exchange_Answer) {
 130      if (a_state != State::Closed) {
 131         string msg(asString());
 132         msg += " | Discarding CEA on not closed state";
 133         throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 134      }
 135
 136   } else*/ if(cid ==  helpers::base::COMMANDID__Device_Watchdog_Answer) {
 137     if(a_state == State::WaitingDPA) {
 138       string msg(asString());
 139       msg += " | DWA is not sent on 'WaitingDPA' state";
 140       //throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 141       LOGDEBUG(anna::Logger::debug(msg, ANNA_FILE_LOCATION));
 142       return NULL;
 143     }
 144
 145     if(a_state == State::Disconnecting) {
 146       string msg(asString());
 147       msg += " | DWA is not sent on 'Disconnecting' state";
 148       //throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 149       LOGDEBUG(anna::Logger::debug(msg, ANNA_FILE_LOCATION));
 150       return NULL;
 151     }
 152   } else if(cid ==  helpers::base::COMMANDID__Disconnect_Peer_Request) {
 153     if(a_state == State::WaitingDPA) {
 154       string msg(asString());
 155       msg += " | Still waiting for DPR ack (DPA)";
 156       throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 157     }
 158
 159     if(a_state == State::Disconnecting) {
 160       string msg(asString());
 161       msg += " | Server disconnection has already been initiated";
 162       throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 163     }
 164   } else {
 165     if((a_state == State::WaitingDPA) || (a_state == State::Disconnecting)) {
 166       if(cid != helpers::base::COMMANDID__Disconnect_Peer_Answer) {
 167         LOGDEBUG(
 168           string msg("diameter::comm::ServerSession::send | ");
 169           msg += asString();
 170           msg += " | Sents (request or answer) blocked to diameter client (disconnection in progress). Discarding ...";
 171           anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 172         );
 173         return NULL;
 174       }
 175     }
 176   }
 177
 178   // Trace send operation:
 179   LOGDEBUG(
 180     string msg("diameter::comm::ServerSession::send | ");
 181     msg += asString();
 182     msg += " | ";
 183     msg += message->asString();
 184     anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 185   );
 186   bool fixed = false; // answers cannot be fixed
 187   Message * message_nc = const_cast<Message*>(message);
 188
 189   if(isRequest) {
 190     // Fixing indicator:
 191     fixed = message_nc->fixRequestSequence(a_nextHopByHop, a_nextEndToEnd);
 192     message_nc->updateRequestTimestampMs(); // statistics purposes (processing time for request type)
 193   }
 194
 195   // Send message
 196   try {
 197     message->send(*this);
 198
 199     // Next hop by hop & end to end identifiers:
 200     if(isRequest) generateNextSequences();
 201
 202     //   Transaction state
 203     //         The Diameter protocol requires that agents maintain transaction
 204     //         state, which is used for failover purposes.  Transaction state
 205     //         implies that upon forwarding a request, the Hop-by-Hop identifier
 206     //         is saved; the field is replaced with a locally unique identifier,
 207     //         which is restored to its original value when the corresponding
 208     //         answer is received.  The request's state is released upon receipt
 209     //         of the answer.  A stateless agent is one that only maintains
 210     //         transaction state.
 211     //
 212     updateOutgoingActivityTime();
 213     // OAM
 214     countSendings(cid, aid, true /* send ok */);
 215     // Trace non-application messages:
 216     LOGDEBUG(
 217
 218       if((cid == helpers::base::COMMANDID__Device_Watchdog_Request) ||
 219     (cid == helpers::base::COMMANDID__Disconnect_Peer_Request)) {
 220     anna::Logger::debug("Sent DataBlock to XML representation:", ANNA_FILE_LOCATION);
 221       try { anna::diameter::codec::Message msg; msg.decode(message->getBody()); /* decode to be traced */ } catch(anna::RuntimeException&) {;}
 222     }
 223     );
 224
 225     // Restore sequences:
 226     if(fixed) message_nc->restoreSequencesAfterFix();  // restore to application sequences after fix
 227   } catch(anna::RuntimeException&) {
 228     if(fixed) message_nc->restoreSequencesAfterFix();  // restore to application sequences after fix
 229
 230     // OAM
 231     countSendings(cid, aid, false /* send no ok */);
 232     throw;
 233   }
 234
 235   // Renew states:
 236   /*if (cid ==  helpers::base::COMMANDID__Capabilities_Exchange_Answer) {
 237      setState(State::Bound); // Done at sendCEA if proceed
 238
 239   } else */if(cid ==  helpers::base::COMMANDID__Disconnect_Peer_Request) {
 240     LOGWARNING(anna::Logger::warning("DPR has been sent to the peer (diameter client)", ANNA_FILE_LOCATION));
 241     setState(State::WaitingDPA);
 242   }
 243
 244   // Answers are not temporized:
 245   if(!isRequest) return NULL;
 246
 247   // Request will have context responses:
 248   Response* result(NULL);
 249   result = Response::instance(message->getClassCode(), a_nextHopByHop - 1 /* current request sent to client */);
 250   result->setRequest(message);
 251   response_add(result);
 252   return result;
 253 }
 254
 255
 256
 257 bool ServerSession::unbind(bool forceDisconnect) throw(anna::RuntimeException) {
 258   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "unbind", ANNA_FILE_LOCATION));
 259
 260   if(a_state == State::Closed)
 261     return false;
 262
 263   // Client socket:
 264   anna::comm::ClientSocket * cs = a_clientSocket;
 265   //anna::comm::ClientSocket * cs = const_cast<anna::comm::ClientSocket*>(a_clientSocket);
 266
 267   if(forceDisconnect) {
 268     LOGDEBUG(anna::Logger::debug("Immediate disconnection (forceDisconnect)", ANNA_FILE_LOCATION));
 269
 270     if(cs) cs->requestClose();  // this will invoke finalize()
 271
 272     return true;
 273   }
 274
 275 //   if (a_state == State::Disconnecting) {
 276 //      LOGDEBUG(
 277 //         string msg("diameter::comm::ServerSession::unbind | ");
 278 //         msg += asString();
 279 //         msg += " | Disconnection already in progress !";
 280 //         anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 281 //      );
 282 //      return false;
 283 //   }
 284 //
 285 //
 286 //   if (a_onDisconnect == OnDisconnect::IgnorePendings) {
 287 //      LOGDEBUG(anna::Logger::debug("Immediate disconnection (IgnorePendings)", ANNA_FILE_LOCATION));
 288 //
 289 //      if (cs) cs->requestClose(); // this will invoke finalize()
 290 //
 291 //      return true;
 292 //   }
 293 //
 294 //   if (getOTARequests() == 0) { // No pendings
 295 //      LOGDEBUG(anna::Logger::debug("No pending answers. Perform client-session close.", ANNA_FILE_LOCATION));
 296 //
 297 //      if (cs) cs->requestClose(); // this will invoke finalize()
 298 //
 299 //      return true;
 300 //   }
 301   return false;
 302 }
 303
 304 void ServerSession::eventPeerShutdown() throw() {
 305   // Inform father server:
 306   a_parent->eventPeerShutdown(this);
 307 }
 308
 309 void ServerSession::eventResponse(const Response& response) throw(anna::RuntimeException) {
 310   // Inform father server:
 311   a_parent->eventResponse(response);
 312 }
 313
 314 void ServerSession::eventRequest(const anna::DataBlock &request) throw(anna::RuntimeException) {
 315   // Inform father server:
 316   a_parent->eventRequest(this, request);
 317 }
 318
 319 void ServerSession::eventUnknownResponse(const anna::DataBlock& response) throw(anna::RuntimeException) {
 320   // Inform father server:
 321   a_parent->eventUnknownResponse(this, response);
 322 }
 323
 324 void ServerSession::eventDPA(const anna::DataBlock& response) throw(anna::RuntimeException) {
 325   // Inform father server:
 326   a_parent->eventDPA(this, response);
 327 }
 328
 329 //------------------------------------------------------------------------------------------
 330 // Se invoca desde el diameter::comm::Receiver
 331 //------------------------------------------------------------------------------------------
 332 void ServerSession::receive(const anna::comm::Message& message)
 333 throw(anna::RuntimeException) {
 334   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "receive", ANNA_FILE_LOCATION));
 335   // Activity:
 336   updateIncomingActivityTime();
 337   activateTimer();
 338   // Command id:
 339   const anna::DataBlock & db = message.getBody();
 340   diameter::CommandId cid = codec::functions::getCommandId(db);
 341   bool isRequest = cid.second;
 342   LOGDEBUG(
 343     std::string msg = "Received diameter message: ";
 344     msg += anna::diameter::functions::commandIdAsPairString(cid);
 345     anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 346
 347     if((cid == helpers::base::COMMANDID__Capabilities_Exchange_Request) || (cid.first == helpers::base::COMMANDID__Device_Watchdog_Request.first))
 348   try { anna::diameter::codec::Message dmsg; dmsg.decode(db); /* decode to be traced */ } catch(anna::RuntimeException&) {;}
 349 );
 350   // Main counters:
 351   OamModule &oamModule = OamModule::instantiate();
 352   oamModule.count(isRequest ? OamModule::Counter::RequestReceived : OamModule::Counter::AnswerReceived);
 353   oamModule.count(isRequest ? OamModule::Counter::RequestReceivedOnServerSession : OamModule::Counter::AnswerReceivedOnServerSession);
 354   // Statistic (size)
 355   a_parent->updateReceivedMessageSizeStatisticConcept(message.getSize()); // only on reception (application could manage sent sizes)
 356
 357   if(isRequest) {
 358     // Si recibo un request, el message solo tiene fiable el DataBlock. Como por defecto se construye como ApplicationMessage,
 359     // el unico caso que no cuadraria seria la recepcion de un CER. Lo que hacemos es NO PROGRESAR NUNCA un CER (*).
 360     // El DWR sin embargo, si podriamos progresarlo al ser de aplicacion, pero no les sirve para nada (**).
 361     /////////////////////////////
 362     // Here received a request //
 363     /////////////////////////////
 364
 365     // Received CER
 366     if(cid == helpers::base::COMMANDID__Capabilities_Exchange_Request) {
 367       oamModule.count(OamModule::Counter::CERReceived);
 368
 369       if(a_state == State::Bound) {
 370         LOGWARNING(anna::Logger::warning("Received another CER over already bound connection. Anyway, will be replied with CEA", ANNA_FILE_LOCATION));
 371       }
 372
 373       a_cer.setBody(db);
 374       sendCEA();
 375       //activateTimer(); // Ya se invoca al inicio de este metodo ::receive
 376       //bool changes = a_parent->refreshAvailability();
 377       return; // (*)
 378     }
 379     // Received DWR
 380     else if(cid == helpers::base::COMMANDID__Device_Watchdog_Request) {
 381       oamModule.count(OamModule::Counter::DWRReceived);
 382       a_dwr.setBody(db);
 383       sendDWA();
 384       return; // (**)
 385     }
 386     // Received DPR
 387     else if(cid == helpers::base::COMMANDID__Disconnect_Peer_Request) {
 388       oamModule.count(OamModule::Counter::DPRReceived);
 389
 390       if(a_state == State::Bound) {
 391         a_dpr.setBody(db);
 392         setState(State::Disconnecting);
 393         LOGWARNING(anna::Logger::warning("DPR has been received from peer (diameter client)", ANNA_FILE_LOCATION));
 394         // Ignore pending on server sessions:
 395         /*if (getOTARequests() == 0) */sendDPA();
 396         return; // DPR won't be informed because virtual readDPA is available for this
 397       }
 398     }
 399
 400     try {
 401       // application message counters
 402       ApplicationMessageOamModule::instantiate().count(cid.first, anna::diameter::codec::functions::getApplicationId(db), ApplicationMessageOamModule::Counter::Request_Received_AsServer);
 403
 404       eventRequest(db);
 405     } catch(anna::RuntimeException& ex) {
 406       ex.trace();
 407     }
 408
 409     return;
 410   }
 411
 412   /////////////////////////////
 413   // Here received an answer //
 414   /////////////////////////////
 415   bool doUnbind = false;
 416   int resultCode = 0;
 417
 418   try {
 419     resultCode = helpers::base::functions::getResultCode(db);
 420   } catch(anna::RuntimeException& ex) {
 421     ex.trace();
 422   }
 423
 424   // Received DPA
 425   if(cid == helpers::base::COMMANDID__Disconnect_Peer_Answer) {
 426     oamModule.count(OamModule::Counter::DPAReceived);
 427
 428     if(a_state == State::WaitingDPA) {
 429       if(resultCode != helpers::base::AVPVALUES__Result_Code::DIAMETER_SUCCESS) {
 430         LOGWARNING(anna::Logger::warning("Received DPA with non-success Result-Code. Ignoring and recovering Bound state", ANNA_FILE_LOCATION));
 431         setState(State::Bound);
 432       } else {
 433         LOGWARNING(anna::Logger::warning("Received DPA With Result-Code = DIAMETER_SUCCESS. Disconnect now.", ANNA_FILE_LOCATION));
 434         doUnbind = true;
 435       }
 436     }
 437
 438     eventDPA(db);
 439
 440   } else if(cid == helpers::base::COMMANDID__Device_Watchdog_Answer) {  // non usual (server should not send DWR's)
 441     oamModule.count(OamModule::Counter::DWAReceived);
 442   }
 443
 444   HopByHop hopByHop = codec::functions::getHopByHop(db); // context identification
 445   Response* response = response_find(hopByHop);
 446
 447   // Out-of-context responses:
 448   if(!response) {
 449     // OAM
 450     oamModule.count(OamModule::Counter::AnswerReceivedUnknown);
 451     oamModule.count(OamModule::Counter::AnswerReceivedOnServerSessionUnknown);
 452     oamModule.activateAlarm(OamModule::Alarm::AnswerReceivedOnServerSessionUnknown);
 453
 454     // application message counters
 455     ApplicationMessageOamModule::instantiate().count(cid.first, anna::diameter::codec::functions::getApplicationId(db), ApplicationMessageOamModule::Counter::Answer_UnknownReceived_AsServer);
 456
 457     eventUnknownResponse(db);
 458
 459     string msg(asString());
 460     msg += anna::functions::asString(" | Response received from client, for non registered context (HopByHop: %u)", hopByHop);
 461     throw anna::RuntimeException(msg, ANNA_FILE_LOCATION);
 462   }
 463
 464   response->setResultCode(Response::ResultCode::Success);
 465   response->cancelTimer();
 466   LOGDEBUG(
 467     string msg("diameter::comm::ServerSession::receive | ");
 468     msg += asString();
 469     msg += " | Received answer";
 470     msg += response->asString();
 471     anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 472   );
 473   // Statistics
 474   anna::Millisecond current = (anna::Millisecond)anna::functions::millisecond();
 475   anna::Millisecond request = response->getRequest()->getRequestTimestampMs();
 476   anna::Millisecond timeToAnswerMs = current - request;
 477   a_parent->updateProcessingTimeStatisticConcept(timeToAnswerMs);
 478   LOGDEBUG
 479   (
 480     std::string msg = "This diameter request context lasted ";
 481     msg += anna::functions::asString(timeToAnswerMs);
 482     msg += " milliseconds at diameter client (included network time)";
 483     anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 484   );
 485   // Progress origin for tracking purposes on asyncronous boxes with both diameter interfaces (entities and clients)
 486   Message * requestMessage = const_cast<Message*>(response->getRequest());
 487   requestMessage->setRequestClientSessionKey(response->getRequest()->getRequestClientSessionKey()); // "" means unkown/unset
 488
 489   if(cid != helpers::base::COMMANDID__Disconnect_Peer_Answer) {
 490     // don't progress DPA: unbind is automatically performed and not open to any application decision
 491     try {
 492       response->setMessage(&db);
 493       // Restore received datablock
 494       LOGDEBUG(
 495         string msg("diameter::comm::ClientSession::receive | Restore answer to original request sequences (hop-by-hop = ");
 496         msg += anna::functions::asString(response->getRequest()->getRequestHopByHop());
 497         msg += ", end-to-end = ";
 498         msg += anna::functions::asString(response->getRequest()->getRequestEndToEnd());
 499         msg += ")";
 500         anna::Logger::debug(msg, ANNA_FILE_LOCATION);
 501       );
 502       diameter::codec::functions::setHopByHop((anna::DataBlock&)db, response->getRequest()->getRequestHopByHop());
 503       diameter::codec::functions::setEndToEnd((anna::DataBlock&)db, response->getRequest()->getRequestEndToEnd());
 504
 505       // application message counters
 506       ApplicationMessageOamModule::instantiate().count(cid.first, anna::diameter::codec::functions::getApplicationId(db), ApplicationMessageOamModule::Counter::Answer_Received_AsServer);
 507
 508       eventResponse(*response);
 509
 510     } catch(anna::RuntimeException& ex) {
 511       ex.trace();
 512     }
 513   }
 514
 515   response_erase(response);
 516
 517   // Unbind trigger
 518   if(doUnbind)
 519     unbind(true /* always immediate */);
 520 }
 521
 522 void ServerSession::finalize() throw() {
 523   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "finalize", ANNA_FILE_LOCATION));
 524   // Configuration overiddings
 525   setOnDisconnect(OnDisconnect::IgnorePendings);
 526   notifyOrphansOnExpiration(false);
 527   // session will be idle after 'Session::finalize'
 528   // (anyway at 99% of the cases, server session would be idle because is not usual to send request from diameter servers)
 529   // Closing state won't be used on server-sessions
 530   Session::finalize(); // sets closed state (unbind at closeServerSession won't repeat client socket close, because returns at the beginning)
 531   // stops timers
 532
 533   // "delete this" indirecto (seria mas elegante borrar las server sessions deprecated mediante un temporizador de purgado)
 534   try {
 535     if(idle()) getParent()->closeServerSession(this);  // http://www.parashift.com/c++-faq-lite/delete-this.html
 536   } catch(anna::RuntimeException& ex) {
 537     ex.trace();
 538   }
 539
 540   // Inform father local server (availability changes):
 541   bool changes = getParent()->refreshAvailability();
 542   // OAM
 543   bool multipleConnections = (getParent()->getMaxConnections() > 1);
 544   std::string socket = anna::functions::socketLiteralAsString(getAddress(), getPort());
 545   OamModule &oamModule = OamModule::instantiate();
 546
 547   if(multipleConnections) {
 548     oamModule.activateAlarm(OamModule::Alarm::LostConnectionForServerSessionAtLocalServer__s__ServerSessionId__d__, socket.c_str(), getSocketId());
 549     oamModule.count(OamModule::Counter::LostConnectionForServerSession);
 550   } else {
 551     oamModule.activateAlarm(OamModule::Alarm::LostConnectionForServerSessionAtLocalServer__s__, socket.c_str());
 552     oamModule.count(OamModule::Counter::LostConnectionForServerSession);
 553   }
 554 }
 555
 556
 557
 558 void ServerSession::sendCEA()
 559 throw(anna::RuntimeException) {
 560   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "sendCEA", ANNA_FILE_LOCATION));
 561   anna::DataBlock cea(true);
 562   a_engine->readCEA(cea, a_cer.getBody()); // Asume that CEA is valid ...
 563   // If one peer sends a CER message to another Peer and receiver does not have support for
 564   //
 565   //  1) any common application then it must return the CEA with Result-Code Avp set to DIAMETER_NO_COMMON_APPLICATION
 566   //     and should disconnect the transport layer connection (automatically done by diameter::comm module).
 567   //  2) no common security mechanism then it must return the CEA with Result-Code Avp set to DIAMETER_NO_COMMON_SECURITY
 568   //     and should disconnect the transport layer connection (automatically done by diameter::comm module).
 569   //  3) if CER is received from any unknown peer then receiver should discard the message, or send the CEA with the
 570   //     Result-Code Avp set to DIAMETER_UNKNOWN_PEER.
 571
 572   if(cea.isEmpty()) {
 573     LOGDEBUG(anna::Logger::debug("Empty CEA message. Remote client never will bound this connection at application level", ANNA_FILE_LOCATION));
 574     LOGWARNING(anna::Logger::warning("Discarding received CER without sending CEA (consider to send CEA with Result-Code DIAMETER_UNKNOWN_PEER)", ANNA_FILE_LOCATION));
 575     return;
 576   }
 577
 578   Message msgCea;
 579   msgCea.setBody(cea);
 580   send(&msgCea);
 581   // Here, CEA has been sent (no exception). Analize CEA Result-Code chosen:
 582   int resultCode = 0;
 583
 584   try {
 585     resultCode = helpers::base::functions::getResultCode(cea);
 586   } catch(anna::RuntimeException& ex) {
 587     ex.trace();
 588   }
 589
 590   switch(resultCode) {
 591   case helpers::base::AVPVALUES__Result_Code::DIAMETER_SUCCESS:
 592     setState(State::Bound);
 593     break;
 594   case helpers::base::AVPVALUES__Result_Code::DIAMETER_NO_COMMON_APPLICATION:
 595     LOGWARNING(anna::Logger::warning("DIAMETER_NO_COMMON_APPLICATION CEA Result-Code implies unbinding connection", ANNA_FILE_LOCATION));
 596     unbind(true /* always immediate */); // no delegamos en un planning o similar
 597     // Realmente el cliente diameter tambien deberia cerrar la conexion al recibir este Result-Code
 598     break;
 599   case helpers::base::AVPVALUES__Result_Code::DIAMETER_NO_COMMON_SECURITY:
 600     LOGWARNING(anna::Logger::warning("DIAMETER_NO_COMMON_SECURITY CEA Result-Code implies unbinding connection", ANNA_FILE_LOCATION));
 601     unbind(true /* always immediate */); // no delegamos en un planning o similar
 602     // Realmente el cliente diameter tambien deberia cerrar la conexion al recibir este Result-Code
 603     break;
 604     // ...
 605     // ...
 606   }
 607 }
 608
 609 void ServerSession::sendDWA()
 610 throw(anna::RuntimeException) {
 611   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "sendDWA", ANNA_FILE_LOCATION));
 612   anna::DataBlock dwa(true);
 613   a_engine->readDWA(dwa, a_dwr.getBody()); // Asume that DWA is valid ...
 614
 615   if(dwa.isEmpty())
 616     throw anna::RuntimeException("This diameter agent defines an empty DWA message. Remote client never will validate this connection health", ANNA_FILE_LOCATION);
 617
 618   Message msgDwa;
 619   msgDwa.setBody(dwa);
 620   send(&msgDwa);
 621 }
 622
 623
 624 //-------------------------------------------------------------------------
 625 // Se invoca desde diameter::comm::Timer
 626 //-------------------------------------------------------------------------
 627 void ServerSession::expireResponse(diameter::comm::Response* response)
 628 throw() {
 629   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "expireResponse", ANNA_FILE_LOCATION));
 630   Session::expireResponse(response);
 631   // OAM
 632   OamModule &oamModule = OamModule::instantiate();
 633   oamModule.count(OamModule::Counter::RequestSentExpired);
 634   oamModule.count(OamModule::Counter::RequestSentOnServerSessionExpired);
 635   oamModule.activateAlarm(OamModule::Alarm::RequestSentOnServerSessionExpired);
 636 //   // "delete this" indirecto (seria mas elegante borrar las server sessions deprecated mediante un temporizador de purgado)
 637 //   if (idle()) a_parent->eraseServerSession(*a_clientSocket); // http://www.parashift.com/c++-faq-lite/delete-this.html
 638 }
 639
 640 std::string ServerSession::asString() const
 641 throw() {
 642   string result = Session::asString();
 643   result += " | Parent Local Server: ";
 644   result += anna::functions::socketLiteralAsString(getAddress(), getPort());
 645   result += " | Client Socket: ";
 646   result += a_clientSocket->asString();
 647   // Diferente del timeout de ApplicationMessage:
 648   result += " | Allowed inactivity time: ";
 649   result += getTimeout().asString();
 650   result += " | Deprecated: ";
 651   result += (a_deprecated ? "yes" : "no");
 652   return result += " }";
 653 }
 654
 655 anna::xml::Node* ServerSession::asXML(anna::xml::Node* parent) const
 656 throw() {
 657   anna::xml::Node* result = Session::asXML(parent);
 658   parent->createChild("diameter.comm.ServerSession");
 659   result->createAttribute("ParentLocalServer", anna::functions::socketLiteralAsString(getAddress(), getPort()));
 660   result->createAttribute("ClientSocket", a_clientSocket->asString());
 661   // Diferente del timeout de ApplicationMessage:
 662   result->createAttribute("AllowedInactivityTime", getTimeout().asString());
 663   result->createAttribute("Deprecated", a_deprecated ? "yes" : "no");
 664   return result;
 665 }
 666
 667
 668 //------------------------------------------------------------------------------
 669 //------------------------------------------------------ ServerSession::expire()
 670 //------------------------------------------------------------------------------
 671 void ServerSession::expire(anna::timex::Engine *timeController) throw(anna::RuntimeException) {
 672   LOGMETHOD(anna::TraceMethod traceMethod(a_className, "expire (inactivity check timer)", ANNA_FILE_LOCATION));
 673   LOGWARNING(anna::Logger::warning("Detecting anomaly (too inactivity time) over server session. Resetting", ANNA_FILE_LOCATION));
 674   // OAM
 675   bool multipleConnections = (getParent()->getMaxConnections() > 1);
 676   std::string socket = anna::functions::socketLiteralAsString(getAddress(), getPort());
 677   OamModule &oamModule = OamModule::instantiate();
 678
 679   if(multipleConnections) {
 680     oamModule.activateAlarm(OamModule::Alarm::UnbindConnectionForServerSessionAtLocalServer__s__ServerSessionId__d__DueToInactivityTimeAnomaly, socket.c_str(), getSocketId());
 681     oamModule.count(OamModule::Counter::UnbindConnectionForServerSessionDueToInactivityTimeAnomaly);
 682   } else {
 683     oamModule.activateAlarm(OamModule::Alarm::UnbindConnectionForServerSessionAtLocalServer__s__DueToInactivityTimeAnomaly, socket.c_str());
 684     oamModule.count(OamModule::Counter::UnbindConnectionForServerSessionDueToInactivityTimeAnomaly);
 685   }
 686
 687   unbind(true /* always immediate */); // no delegamos en un planning o similar
 688 }
 689
 690 void ServerSession::setAllowedInactivityTime(const anna::Millisecond & allowedInactivityTime) throw() {
 691   setTimeout(allowedInactivityTime);
 692 }
 693
 694 //------------------------------------------------------------------------------
 695 //---------------------------------- ServerSession::updateIncomingActivityTime()
 696 //------------------------------------------------------------------------------
 697 void ServerSession::updateIncomingActivityTime() throw() {
 698   Session::updateIncomingActivityTime();
 699   a_parent->updateIncomingActivityTime();
 700 }
 701
 702
 703 //------------------------------------------------------------------------------
 704 //---------------------------------- ServerSession::updateOutgoingActivityTime()
 705 //------------------------------------------------------------------------------
 706 void ServerSession::updateOutgoingActivityTime(void) throw() {
 707   Session::updateOutgoingActivityTime();
 708   a_parent->updateOutgoingActivityTime();
 709 }
 710
 711
 712 //------------------------------------------------------------------------------
 713 //----------------------------------------------- ServerSession::countSendings()
 714 //------------------------------------------------------------------------------
 715 void ServerSession::countSendings(const diameter::CommandId & cid, unsigned int aid, bool ok)throw() {
 716   OamModule &oamModule = OamModule::instantiate();
 717   ApplicationMessageOamModule &appMsgOamModule = ApplicationMessageOamModule::instantiate();
 718
 719   bool isRequest = cid.second;
 720
 721   if(ok) {
 722     // Main counters:
 723     oamModule.count(isRequest ? OamModule::Counter::RequestSentOK : OamModule::Counter::AnswerSentOK);
 724     oamModule.count(isRequest ? OamModule::Counter::RequestSentOnServerSessionOK : OamModule::Counter::AnswerSentOnServerSessionOK);
 725
 726     if(cid == helpers::base::COMMANDID__Capabilities_Exchange_Answer) oamModule.count(OamModule::Counter::CEASentOK);
 727     else if(cid == helpers::base::COMMANDID__Device_Watchdog_Answer) oamModule.count(OamModule::Counter::DWASentOK);
 728     else if(cid == helpers::base::COMMANDID__Device_Watchdog_Request) oamModule.count(OamModule::Counter::DWRSentOK);  // not usual
 729     else if(cid == helpers::base::COMMANDID__Disconnect_Peer_Answer) oamModule.count(OamModule::Counter::DPASentOK);
 730     else if(cid == helpers::base::COMMANDID__Disconnect_Peer_Request) oamModule.count(OamModule::Counter::DPRSentOK);
 731     // Application messages:
 732     else {
 733       appMsgOamModule.count(cid.first, aid, isRequest ? ApplicationMessageOamModule::Counter::Request_SentOK_AsServer : ApplicationMessageOamModule::Counter::Answer_SentOK_AsServer);
 734     }
 735   } else {
 736     // Main counters:
 737     oamModule.count(isRequest ? OamModule::Counter::RequestSentNOK : OamModule::Counter::AnswerSentNOK);
 738     oamModule.count(isRequest ? OamModule::Counter::RequestSentOnServerSessionNOK : OamModule::Counter::RequestSentOnServerSessionNOK);
 739
 740     if(cid == helpers::base::COMMANDID__Capabilities_Exchange_Answer) oamModule.count(OamModule::Counter::CEASentNOK);
 741     else if(cid == helpers::base::COMMANDID__Device_Watchdog_Answer) oamModule.count(OamModule::Counter::DWASentNOK);
 742     else if(cid == helpers::base::COMMANDID__Device_Watchdog_Request) oamModule.count(OamModule::Counter::DWRSentNOK);  // not usual
 743     else if(cid == helpers::base::COMMANDID__Disconnect_Peer_Answer) oamModule.count(OamModule::Counter::DPASentNOK);
 744     else if(cid == helpers::base::COMMANDID__Disconnect_Peer_Request) oamModule.count(OamModule::Counter::DPRSentNOK);
 745     // Application messages:
 746     else {
 747       appMsgOamModule.count(cid.first, aid, isRequest ? ApplicationMessageOamModule::Counter::Request_SentNOK_AsServer : ApplicationMessageOamModule::Counter::Answer_SentNOK_AsServer);
 748     }
 749   }
 750 }
 751
 752