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_CONFIG_SUFFIX;
  85
  86     std::ifstream addressConfigFile;
  87
  88     addressConfigFile.open(fqnOfConfigFile.c_str());
  89
  90     if(addressConfigFile) {
  91         std::string currentlyParsedCommonApiAddress;
  92         DBusServiceAddress dbusServiceAddress;
  93         reset(dbusServiceAddress);
  94
  95         bool currentAddressNotYetContained = false;
  96         bool atLeastOneAddressFound = false;
  97
  98         while (addressConfigFile.good()) {
  99             std::string readLine;
 100             getline(addressConfigFile, readLine);
 101             const size_t readLineLength = readLine.length();
 102
 103             if (readLine[0] == '[' && readLine[readLineLength - 1] == ']') {
 104                 if (atLeastOneAddressFound) {
 105                     fillUndefinedRequiredValues(dbusServiceAddress, currentlyParsedCommonApiAddress);
 106                     knownDBusAddresses.insert( {currentlyParsedCommonApiAddress, dbusServiceAddress});
 107                     knownCommonAddresses.insert( {dbusServiceAddress, currentlyParsedCommonApiAddress});
 108                 }
 109                 reset(dbusServiceAddress);
 110                 currentlyParsedCommonApiAddress = readLine.substr(1, readLineLength - 2);
 111                 currentAddressNotYetContained =
 112                                 knownDBusAddresses.find(currentlyParsedCommonApiAddress) == knownDBusAddresses.end()
 113                                                 &&
 114                                                 knownCommonAddresses.find(dbusServiceAddress)
 115                                                                 == knownCommonAddresses.end();
 116                 atLeastOneAddressFound = true;
 117
 118             } else if (currentAddressNotYetContained) {
 119                 readValue(readLine, dbusServiceAddress);
 120             }
 121         }
 122         knownDBusAddresses.insert( {currentlyParsedCommonApiAddress, dbusServiceAddress});
 123
 124         addressConfigFile.close();
 125     }
 126 }
 127
 128
 129 DBusAddressTranslator& DBusAddressTranslator::getInstance() {
 130     static DBusAddressTranslator* dbusNameService_;
 131     if(!dbusNameService_) {
 132         dbusNameService_ = new DBusAddressTranslator();
 133     }
 134     return *dbusNameService_;
 135 }
 136
 137
 138 void DBusAddressTranslator::searchForDBusAddress(const std::string& commonApiAddress,
 139                                                  std::string& interfaceName,
 140                                                  std::string& connectionName,
 141                                                  std::string& objectPath) {
 142
 143     const auto& foundAddressMapping = knownDBusAddresses.find(commonApiAddress);
 144     if(foundAddressMapping != knownDBusAddresses.end()) {
 145         connectionName = std::get<0>(foundAddressMapping->second);
 146         objectPath = std::get<1>(foundAddressMapping->second);
 147         interfaceName = std::get<2>(foundAddressMapping->second);
 148     } else {
 149         findFallbackDBusAddress(commonApiAddress, interfaceName, connectionName, objectPath);
 150         knownDBusAddresses.insert( {commonApiAddress, std::make_tuple(connectionName, objectPath, interfaceName) } );
 151     }
 152 }
 153
 154 void DBusAddressTranslator::searchForCommonAddress(const std::string& interfaceName,
 155                                                    const std::string& connectionName,
 156                                                    const std::string& objectPath,
 157                                                    std::string& commonApiAddress) {
 158
 159     DBusServiceAddress dbusAddress(connectionName, objectPath, interfaceName);
 160
 161     const auto& foundAddressMapping = knownCommonAddresses.find(dbusAddress);
 162     if (foundAddressMapping != knownCommonAddresses.end()) {
 163         commonApiAddress = foundAddressMapping->second;
 164     } else {
 165         findFallbackCommonAddress(commonApiAddress, interfaceName, connectionName, objectPath);
 166         knownCommonAddresses.insert( {std::move(dbusAddress), commonApiAddress} );
 167     }
 168 }
 169
 170
 171 void DBusAddressTranslator::findFallbackDBusAddress(const std::string& commonApiAddress,
 172                                                     std::string& interfaceName,
 173                                                     std::string& connectionName,
 174                                                     std::string& objectPath) const {
 175     std::vector<std::string> parts = split(commonApiAddress, ':');
 176     interfaceName = parts[1];
 177     connectionName = parts[2];
 178     objectPath = '/' + parts[2];
 179     std::replace(objectPath.begin(), objectPath.end(), '.', '/');
 180 }
 181
 182 void DBusAddressTranslator::findFallbackCommonAddress(std::string& commonApiAddress,
 183                                                       const std::string& interfaceName,
 184                                                       const std::string& connectionName,
 185                                                       const std::string& objectPath) const {
 186     commonApiAddress = "local:" + interfaceName + ":" + connectionName;
 187 }
 188
 189
 190 }// namespace DBus
 191 }// namespace CommonAPI