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::fillUndefinedValues(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     std::get<2>(dbusServiceAddress) = std::get<2>(dbusServiceAddress) == "" ? interfaceName : std::get<2>(dbusServiceAddress);
  77 }
  78
  79
  80 DBusAddressTranslator::DBusAddressTranslator() {}
  81
  82
  83 void DBusAddressTranslator::init() {
  84     std::string fqnOfConfigFile = getCurrentBinaryFileName();
  85     fqnOfConfigFile += DBUS_CONFIG_SUFFIX;
  86
  87     std::ifstream addressConfigFile;
  88
  89     addressConfigFile.open(fqnOfConfigFile.c_str());
  90
  91     if(addressConfigFile) {
  92         std::string currentlyParsedCommonApiAddress;
  93         DBusServiceAddress dbusServiceAddress;
  94         reset(dbusServiceAddress);
  95
  96         bool currentAddressNotYetContained = false;
  97         bool atLeastOneAddressFound = false;
  98
  99         while (addressConfigFile.good()) {
 100             std::string readLine;
 101             getline(addressConfigFile, readLine);
 102             const size_t readLineLength = readLine.length();
 103
 104             if (readLine[0] == '[' && readLine[readLineLength - 1] == ']') {
 105                 if (atLeastOneAddressFound) {
 106                     fillUndefinedValues(dbusServiceAddress, currentlyParsedCommonApiAddress);
 107                     knownDBusAddresses.insert( {currentlyParsedCommonApiAddress, dbusServiceAddress});
 108                     knownCommonAddresses.insert( {dbusServiceAddress, currentlyParsedCommonApiAddress});
 109                 }
 110                 reset(dbusServiceAddress);
 111                 currentlyParsedCommonApiAddress = readLine.substr(1, readLineLength - 2);
 112                 currentAddressNotYetContained =
 113                                 knownDBusAddresses.find(currentlyParsedCommonApiAddress) == knownDBusAddresses.end() &&
 114                                 knownCommonAddresses.find(dbusServiceAddress) == knownCommonAddresses.end();
 115                 atLeastOneAddressFound = true;
 116
 117             } else if (currentAddressNotYetContained) {
 118                 readValue(readLine, dbusServiceAddress);
 119             }
 120         }
 121         if(atLeastOneAddressFound) {
 122             fillUndefinedValues(dbusServiceAddress, currentlyParsedCommonApiAddress);
 123             knownDBusAddresses.insert( {currentlyParsedCommonApiAddress, dbusServiceAddress});
 124             knownCommonAddresses.insert( {dbusServiceAddress, currentlyParsedCommonApiAddress});
 125         }
 126
 127         addressConfigFile.close();
 128     }
 129 }
 130
 131
 132 DBusAddressTranslator& DBusAddressTranslator::getInstance() {
 133     static DBusAddressTranslator* dbusNameService_;
 134     if(!dbusNameService_) {
 135         dbusNameService_ = new DBusAddressTranslator();
 136         dbusNameService_->init();
 137     }
 138     return *dbusNameService_;
 139 }
 140
 141
 142 void DBusAddressTranslator::searchForDBusAddress(const std::string& commonApiAddress,
 143                                                  std::string& interfaceName,
 144                                                  std::string& connectionName,
 145                                                  std::string& objectPath) {
 146
 147     const auto& foundAddressMapping = knownDBusAddresses.find(commonApiAddress);
 148     if(foundAddressMapping != knownDBusAddresses.end()) {
 149         connectionName = std::get<0>(foundAddressMapping->second);
 150         objectPath = std::get<1>(foundAddressMapping->second);
 151         interfaceName = std::get<2>(foundAddressMapping->second);
 152     } else {
 153         findFallbackDBusAddress(commonApiAddress, interfaceName, connectionName, objectPath);
 154         knownDBusAddresses.insert( {commonApiAddress, std::make_tuple(connectionName, objectPath, interfaceName) } );
 155     }
 156 }
 157
 158 void DBusAddressTranslator::searchForCommonAddress(const std::string& interfaceName,
 159                                                    const std::string& connectionName,
 160                                                    const std::string& objectPath,
 161                                                    std::string& commonApiAddress) {
 162
 163     DBusServiceAddress dbusAddress(connectionName, objectPath, interfaceName);
 164
 165     const auto& foundAddressMapping = knownCommonAddresses.find(dbusAddress);
 166     if (foundAddressMapping != knownCommonAddresses.end()) {
 167         commonApiAddress = foundAddressMapping->second;
 168     } else {
 169         findFallbackCommonAddress(commonApiAddress, interfaceName, connectionName, objectPath);
 170         knownCommonAddresses.insert( {std::move(dbusAddress), commonApiAddress} );
 171     }
 172 }
 173
 174
 175 void DBusAddressTranslator::findFallbackDBusAddress(const std::string& commonApiAddress,
 176                                                     std::string& interfaceName,
 177                                                     std::string& connectionName,
 178                                                     std::string& objectPath) const {
 179     std::vector<std::string> parts = split(commonApiAddress, ':');
 180     interfaceName = parts[1];
 181     connectionName = parts[2];
 182     objectPath = '/' + parts[2];
 183     std::replace(objectPath.begin(), objectPath.end(), '.', '/');
 184 }
 185
 186 void DBusAddressTranslator::findFallbackCommonAddress(std::string& commonApiAddress,
 187                                                       const std::string& interfaceName,
 188                                                       const std::string& connectionName,
 189                                                       const std::string& objectPath) const {
 190     commonApiAddress = "local:" + interfaceName + ":" + connectionName;
 191 }
 192
 193
 194 }// namespace DBus
 195 }// namespace CommonAPI