src/CommonAPI/DBus/DBusAddressTranslator.cpp

   1 /* Copyright (C) 2013 BMW Group
   2  * Author: Manfred Bathelt (manfred.bathelt@bmw.de)
   3  * Author: Juergen Gehring (juergen.gehring@bmw.de)
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8
   9 #include "DBusAddressTranslator.h"
  10 #include "DBusUtils.h"
  11
  12 #include <unordered_set>
  13 #include <string.h>
  14 #include <iostream>
  15 #include <fstream>
  16 #include <cassert>
  17
  18
  19 namespace CommonAPI {
  20 namespace DBus {
  21
  22
  23 enum class TypeEnum {
  24     DBUS_CONNECTION, DBUS_OBJECT, DBUS_INTERFACE
  25 };
  26
  27 static const std::unordered_map<std::string, TypeEnum> allowedValueTypes = {
  28                 {"dbus_connection", TypeEnum::DBUS_CONNECTION},
  29                 {"dbus_object", TypeEnum::DBUS_OBJECT},
  30                 {"dbus_interface", TypeEnum::DBUS_INTERFACE}
  31 };
  32
  33
  34 inline void readValue(std::string& readLine, DBusServiceAddress dbusServiceAddress) {
  35     std::stringstream readStream(readLine);
  36
  37     std::string paramName;
  38     std::string paramValue;
  39
  40     getline(readStream, paramName, '=');
  41
  42     auto typeEntry = allowedValueTypes.find(paramName);
  43     if(typeEntry != allowedValueTypes.end()) {
  44         getline(readStream, paramValue);
  45         switch(typeEntry->second) {
  46             case TypeEnum::DBUS_CONNECTION:
  47                 std::get<0>(dbusServiceAddress) = paramValue;
  48                 break;
  49             case TypeEnum::DBUS_OBJECT:
  50                 std::get<1>(dbusServiceAddress) = paramValue;
  51                 break;
  52             case TypeEnum::DBUS_INTERFACE:
  53                 std::get<2>(dbusServiceAddress) = paramValue;
  54                 break;
  55         }
  56     }
  57 }
  58
  59
  60 inline void reset(DBusServiceAddress& dbusServiceAddress) {
  61     std::get<0>(dbusServiceAddress) = "";
  62     std::get<1>(dbusServiceAddress) = "";
  63     std::get<2>(dbusServiceAddress) = "";
  64 }
  65
  66
  67 void DBusAddressTranslator::fillUndefinedRequiredValues(DBusServiceAddress& dbusServiceAddress, const std::string& commonApiAddress) const {
  68     std::string connectionName;
  69     std::string objectPath;
  70     std::string interfaceName;
  71
  72     findFallbackDBusAddress(commonApiAddress, interfaceName, connectionName, objectPath);
  73
  74     std::get<0>(dbusServiceAddress) = std::get<0>(dbusServiceAddress) == "" ? connectionName : std::get<0>(dbusServiceAddress);
  75     std::get<1>(dbusServiceAddress) = std::get<1>(dbusServiceAddress) == "" ? objectPath : std::get<1>(dbusServiceAddress);
  76 }
  77
  78 //TODO: Fall, dass Datei nicht gefunden!
  79 //TODO: Suche in etc/config (oder so)
  80
  81
  82 DBusAddressTranslator::DBusAddressTranslator() {
  83     std::string fqnOfConfigFile = getCurrentBinaryFileName();
  84     fqnOfConfigFile += "_dbus.conf";
  85
  86     std::ifstream addressConfigFile;
  87
  88     addressConfigFile.open(fqnOfConfigFile.c_str());
  89
  90     std::string currentlyParsedCommonApiAddress;
  91     DBusServiceAddress dbusServiceAddress;
  92     reset(dbusServiceAddress);
  93
  94     bool currentAddressNotYetContained = false;
  95     bool atLeastOneAddressFound = false;
  96
  97     while (addressConfigFile.good()) {
  98         std::string readLine;
  99         getline(addressConfigFile, readLine);
 100         const size_t readLineLength = readLine.length();
 101
 102         if (readLine[0] == '[' && readLine[readLineLength - 1] == ']') {
 103             if(atLeastOneAddressFound) {
 104                 fillUndefinedRequiredValues(dbusServiceAddress, currentlyParsedCommonApiAddress);
 105                 knownDBusAddresses.insert( {currentlyParsedCommonApiAddress, dbusServiceAddress} );
 106                 knownCommonAddresses.insert( {dbusServiceAddress, currentlyParsedCommonApiAddress} );
 107             }
 108             reset(dbusServiceAddress);
 109             currentlyParsedCommonApiAddress = readLine.substr(1, readLineLength - 2);
 110             currentAddressNotYetContained =
 111                             knownDBusAddresses.find(currentlyParsedCommonApiAddress) == knownDBusAddresses.end() &&
 112                             knownCommonAddresses.find(dbusServiceAddress) == knownCommonAddresses.end();
 113             atLeastOneAddressFound = true;
 114
 115         } else if(currentAddressNotYetContained) {
 116             readValue(readLine, dbusServiceAddress);
 117         }
 118     }
 119     knownDBusAddresses.insert( {currentlyParsedCommonApiAddress, dbusServiceAddress} );
 120
 121     addressConfigFile.close();
 122 }
 123
 124
 125 DBusAddressTranslator& DBusAddressTranslator::getInstance() {
 126     static DBusAddressTranslator* dbusNameService_;
 127     if(!dbusNameService_) {
 128         dbusNameService_ = new DBusAddressTranslator();
 129     }
 130     return *dbusNameService_;
 131 }
 132
 133
 134 void DBusAddressTranslator::searchForDBusAddress(const std::string& commonApiAddress,
 135                                                  std::string& interfaceName,
 136                                                  std::string& connectionName,
 137                                                  std::string& objectPath) {
 138
 139     const auto& foundAddressMapping = knownDBusAddresses.find(commonApiAddress);
 140     if(foundAddressMapping != knownDBusAddresses.end()) {
 141         connectionName = std::get<0>(foundAddressMapping->second);
 142         objectPath = std::get<1>(foundAddressMapping->second);
 143         interfaceName = std::get<2>(foundAddressMapping->second);
 144     } else {
 145         findFallbackDBusAddress(commonApiAddress, interfaceName, connectionName, objectPath);
 146         knownDBusAddresses.insert( {commonApiAddress, std::make_tuple(connectionName, objectPath, interfaceName) } );
 147     }
 148 }
 149
 150 void DBusAddressTranslator::searchForCommonAddress(const std::string& interfaceName,
 151                                                    const std::string& connectionName,
 152                                                    const std::string& objectPath,
 153                                                    std::string& commonApiAddress) {
 154
 155     DBusServiceAddress dbusAddress(connectionName, objectPath, interfaceName);
 156
 157     const auto& foundAddressMapping = knownCommonAddresses.find(dbusAddress);
 158     if (foundAddressMapping != knownCommonAddresses.end()) {
 159         commonApiAddress = foundAddressMapping->second;
 160     } else {
 161         findFallbackCommonAddress(commonApiAddress, interfaceName, connectionName, objectPath);
 162         knownCommonAddresses.insert( {std::move(dbusAddress), commonApiAddress} );
 163     }
 164 }
 165
 166
 167 void DBusAddressTranslator::findFallbackDBusAddress(const std::string& commonApiAddress,
 168                                                     std::string& interfaceName,
 169                                                     std::string& connectionName,
 170                                                     std::string& objectPath) const {
 171     std::vector<std::string> parts = split(commonApiAddress, ':');
 172     interfaceName = parts[1];
 173     connectionName = parts[2];
 174     objectPath = '/' + parts[2];
 175     std::replace(objectPath.begin(), objectPath.end(), '.', '/');
 176 }
 177
 178 void DBusAddressTranslator::findFallbackCommonAddress(std::string& commonApiAddress,
 179                                                       const std::string& interfaceName,
 180                                                       const std::string& connectionName,
 181                                                       const std::string& objectPath) const {
 182     commonApiAddress = "local:" + interfaceName + ":" + connectionName;
 183 }
 184
 185
 186 }// namespace DBus
 187 }// namespace CommonAPI