source/diameter/helpers/dcca/functions.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 // Local
  10 #include <anna/diameter/helpers/dcca/defines.hpp>
  11 #include <anna/diameter/helpers/dcca/functions.hpp>
  12 #include <anna/diameter/codec/Message.hpp>
  13 #include <anna/diameter/codec/functions.hpp>
  14 #include <anna/config/defines.hpp> // general types, decoding helpers (DECODE[2/3/4]BYTES_INDX_VALUETYPE), etc.
  15 #include <anna/core/functions.hpp>
  16
  17 #include <anna/core/functions.hpp>
  18 #include <anna/core/DataBlock.hpp>
  19
  20 // STL
  21 #include <string>
  22
  23 using namespace anna;
  24 using namespace anna::diameter::codec;
  25 using namespace anna::diameter::helpers::dcca;
  26
  27
  28
  29 //static
  30 const char anna::diameter::helpers::dcca::ChargingContextAndDomainSuffix::Data[] = "32251@3gpp.org";
  31 const char anna::diameter::helpers::dcca::ChargingContextAndDomainSuffix::Voice[] = "OCS-CS@telefonica.com";
  32 const char anna::diameter::helpers::dcca::ChargingContextAndDomainSuffix::Content[] = "OCS-Generic-Services@telefonica.com";
  33 const char anna::diameter::helpers::dcca::ChargingContextAndDomainSuffix::SMS[] = "32274@3gpp.org";
  34 const char anna::diameter::helpers::dcca::ChargingContextAndDomainSuffix::MMS[] = "32270@3gpp.org";
  35
  36
  37 // getters
  38 std::string anna::diameter::helpers::dcca::functions::getSubscriptionIdData(const anna::DataBlock & db, int subscriptionIdType) noexcept(false) {
  39   if(db.getSize() < Message::HeaderLength)
  40     throw anna::RuntimeException("Not enough bytes to cover command header length", ANNA_FILE_LOCATION);
  41
  42   // Message datablock:
  43   const char *avpsDB = db.getData() + Message::HeaderLength;
  44   int avpsLen = db.getSize() - Message::HeaderLength;
  45
  46   // Auxiliar avp decoding:
  47   AvpId _id;
  48   char _flags;
  49   int _length;
  50   int type;
  51   std::string _dataG /* grouped avp */, _data1 /* first avp within grouped */, _data2 /* second avp within grouped */;
  52
  53   const char * subscriptionIdPtr;
  54   int pos = 1; // first subscriber to find
  55   while((subscriptionIdPtr = diameter::codec::functions::findAVP(avpsDB, avpsLen, AVPID__Subscription_Id, pos))) {
  56
  57     // Decode data for the grouped avp found:
  58     diameter::codec::functions::decodeAVP(subscriptionIdPtr, _id, _flags, _length, _dataG);
  59     // Data (_dataG) consists in two mandatory Avps in ANY order:
  60     //  - Subscription-Id-Type (Enumerated derived from Integer32)
  61     //  - Subscription-Id-Data (UTF8String)
  62
  63     // First AVP within _dataG:
  64     diameter::codec::functions::decodeAVP(_dataG.c_str(), _id, _flags, _length, _data1);
  65
  66     if (_id == diameter::helpers::dcca::AVPID__Subscription_Id_Type) {
  67       type = DECODE4BYTES_INDX_VALUETYPE(_data1, 0, int);
  68       if (type == subscriptionIdType) {
  69         diameter::codec::functions::decodeAVP(_dataG.c_str() + 12, _id, _flags, _length, _data2);
  70         if (_id == diameter::helpers::dcca::AVPID__Subscription_Id_Data) return _data2;
  71       }
  72     }
  73     else if (_id == diameter::helpers::dcca::AVPID__Subscription_Id_Data) {
  74       diameter::codec::functions::decodeAVP(_dataG.c_str() + 20, _id, _flags, _length, _data2);
  75       if (_id == diameter::helpers::dcca::AVPID__Subscription_Id_Type) {
  76         type = DECODE4BYTES_INDX_VALUETYPE(_data2, 0, int);
  77         if (type == subscriptionIdType) return _data1;
  78       }
  79     }
  80
  81     pos++;
  82   }
  83
  84
  85   // Nothing retrieved:
  86   return "";
  87 }
  88
  89
  90 std::string anna::diameter::helpers::dcca::functions::getServiceContextId(const anna::DataBlock & db, ChargingContext::_v &chargingContext) noexcept(false) {
  91   if(db.getSize() < Message::HeaderLength)
  92     throw anna::RuntimeException("Not enough bytes to cover command header length", ANNA_FILE_LOCATION);
  93
  94   //anna::DataBlock avpsDB(db.getData() + Message::HeaderLength, db.getSize() - Message::HeaderLength);
  95   //const char * serviceContextIdPtr = anna::diameter::codec::functions::findAVP(avpsDB, AVPID__Service_Context_Id);
  96
  97   const char *avpsDB = db.getData() + Message::HeaderLength;
  98   int avpsLen = db.getSize() - Message::HeaderLength;
  99   const char * serviceContextIdPtr = anna::diameter::codec::functions::findAVP(avpsDB, avpsLen, AVPID__Service_Context_Id);
 100
 101   if(serviceContextIdPtr == NULL)
 102     throw anna::RuntimeException("Service-Context-Id AVP not found in DataBlock provided", ANNA_FILE_LOCATION);
 103
 104   // Decoded avp information:
 105   AvpId _id;
 106   char _flags;
 107   int _length;
 108   std::string result;
 109   anna::diameter::codec::functions::decodeAVP(serviceContextIdPtr, _id, _flags, _length, result /* data-part */);
 110   // Charging context detection:
 111   chargingContext = ChargingContext::Unknown;
 112
 113   if(anna::functions::endsWith(result, ChargingContextAndDomainSuffix::Data))
 114     chargingContext = ChargingContext::Data;
 115   else if(anna::functions::endsWith(result, ChargingContextAndDomainSuffix::Voice))
 116     chargingContext = ChargingContext::Voice;
 117   else if(anna::functions::endsWith(result, ChargingContextAndDomainSuffix::Content))
 118     chargingContext = ChargingContext::Content;
 119   else if(anna::functions::endsWith(result, ChargingContextAndDomainSuffix::SMS))
 120     chargingContext = ChargingContext::SMS;
 121   else if(anna::functions::endsWith(result, ChargingContextAndDomainSuffix::MMS))
 122     chargingContext = ChargingContext::MMS;
 123
 124   // ...
 125   // future kind of traffic
 126   return result;
 127 }
 128