chromeos/network/network_util.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chromeos/network/network_util.h"
   6
   7 #include "base/strings/string_number_conversions.h"
   8 #include "base/strings/string_tokenizer.h"
   9 #include "base/strings/string_util.h"
  10 #include "chromeos/login/login_state.h"
  11 #include "chromeos/network/device_state.h"
  12 #include "chromeos/network/managed_network_configuration_handler.h"
  13 #include "chromeos/network/network_state.h"
  14 #include "chromeos/network/network_state_handler.h"
  15 #include "chromeos/network/network_ui_data.h"
  16 #include "chromeos/network/onc/onc_signature.h"
  17 #include "chromeos/network/onc/onc_translation_tables.h"
  18 #include "chromeos/network/onc/onc_translator.h"
  19 #include "third_party/cros_system_api/dbus/service_constants.h"
  20
  21 namespace chromeos {
  22
  23 WifiAccessPoint::WifiAccessPoint()
  24     : signal_strength(0),
  25       signal_to_noise(0),
  26       channel(0) {
  27 }
  28
  29 WifiAccessPoint::~WifiAccessPoint() {
  30 }
  31
  32 CellularScanResult::CellularScanResult() {
  33 }
  34
  35 CellularScanResult::~CellularScanResult() {
  36 }
  37
  38 namespace network_util {
  39
  40 std::string PrefixLengthToNetmask(int32 prefix_length) {
  41   std::string netmask;
  42   // Return the empty string for invalid inputs.
  43   if (prefix_length < 0 || prefix_length > 32)
  44     return netmask;
  45   for (int i = 0; i < 4; i++) {
  46     int remainder = 8;
  47     if (prefix_length >= 8) {
  48       prefix_length -= 8;
  49     } else {
  50       remainder = prefix_length;
  51       prefix_length = 0;
  52     }
  53     if (i > 0)
  54       netmask += ".";
  55     int value = remainder == 0 ? 0 :
  56         ((2L << (remainder - 1)) - 1) << (8 - remainder);
  57     netmask += base::IntToString(value);
  58   }
  59   return netmask;
  60 }
  61
  62 int32 NetmaskToPrefixLength(const std::string& netmask) {
  63   int count = 0;
  64   int prefix_length = 0;
  65   base::StringTokenizer t(netmask, ".");
  66   while (t.GetNext()) {
  67     // If there are more than 4 numbers, then it's invalid.
  68     if (count == 4)
  69       return -1;
  70
  71     std::string token = t.token();
  72     // If we already found the last mask and the current one is not
  73     // "0" then the netmask is invalid. For example, 255.224.255.0
  74     if (prefix_length / 8 != count) {
  75       if (token != "0")
  76         return -1;
  77     } else if (token == "255") {
  78       prefix_length += 8;
  79     } else if (token == "254") {
  80       prefix_length += 7;
  81     } else if (token == "252") {
  82       prefix_length += 6;
  83     } else if (token == "248") {
  84       prefix_length += 5;
  85     } else if (token == "240") {
  86       prefix_length += 4;
  87     } else if (token == "224") {
  88       prefix_length += 3;
  89     } else if (token == "192") {
  90       prefix_length += 2;
  91     } else if (token == "128") {
  92       prefix_length += 1;
  93     } else if (token == "0") {
  94       prefix_length += 0;
  95     } else {
  96       // mask is not a valid number.
  97       return -1;
  98     }
  99     count++;
 100   }
 101   if (count < 4)
 102     return -1;
 103   return prefix_length;
 104 }
 105
 106 std::string FormattedMacAddress(const std::string& shill_mac_address) {
 107   if (shill_mac_address.size() % 2 != 0)
 108     return shill_mac_address;
 109   std::string result;
 110   for (size_t i = 0; i < shill_mac_address.size(); ++i) {
 111     if ((i != 0) && (i % 2 == 0))
 112       result.push_back(':');
 113     result.push_back(base::ToUpperASCII(shill_mac_address[i]));
 114   }
 115   return result;
 116 }
 117
 118 bool ParseCellularScanResults(const base::ListValue& list,
 119                               std::vector<CellularScanResult>* scan_results) {
 120   scan_results->clear();
 121   scan_results->reserve(list.GetSize());
 122   for (base::ListValue::const_iterator it = list.begin();
 123        it != list.end(); ++it) {
 124     if (!(*it)->IsType(base::Value::TYPE_DICTIONARY))
 125       return false;
 126     CellularScanResult scan_result;
 127     const base::DictionaryValue* dict =
 128         static_cast<const base::DictionaryValue*>(*it);
 129     // If the network id property is not present then this network cannot be
 130     // connected to so don't include it in the results.
 131     if (!dict->GetStringWithoutPathExpansion(shill::kNetworkIdProperty,
 132                                              &scan_result.network_id))
 133       continue;
 134     dict->GetStringWithoutPathExpansion(shill::kStatusProperty,
 135                                         &scan_result.status);
 136     dict->GetStringWithoutPathExpansion(shill::kLongNameProperty,
 137                                         &scan_result.long_name);
 138     dict->GetStringWithoutPathExpansion(shill::kShortNameProperty,
 139                                         &scan_result.short_name);
 140     dict->GetStringWithoutPathExpansion(shill::kTechnologyProperty,
 141                                         &scan_result.technology);
 142     scan_results->push_back(scan_result);
 143   }
 144   return true;
 145 }
 146
 147 scoped_ptr<base::DictionaryValue> TranslateNetworkStateToONC(
 148     const NetworkState* network) {
 149   // Get the properties from the NetworkState.
 150   scoped_ptr<base::DictionaryValue> shill_dictionary(new base::DictionaryValue);
 151   network->GetStateProperties(shill_dictionary.get());
 152
 153   // Get any Device properties required to translate state.
 154   if (NetworkTypePattern::Cellular().MatchesType(network->type())) {
 155     // We need to set Device[Cellular.ProviderRequiresRoaming] so that
 156     // Cellular[RoamingState] can be set correctly for badging network icons.
 157     const DeviceState* device =
 158         NetworkHandler::Get()->network_state_handler()->GetDeviceState(
 159             network->device_path());
 160     if (device) {
 161       scoped_ptr<base::DictionaryValue> device_dict(new base::DictionaryValue);
 162       device_dict->SetBooleanWithoutPathExpansion(
 163           shill::kProviderRequiresRoamingProperty,
 164           device->provider_requires_roaming());
 165       shill_dictionary->SetWithoutPathExpansion(shill::kDeviceProperty,
 166                                                 device_dict.release());
 167     }
 168   }
 169
 170   // NetworkState is always associated with the primary user profile, regardless
 171   // of what profile is associated with the page that calls this method. We do
 172   // not expose any sensitive properties in the resulting dictionary, it is
 173   // only used to show connection state and icons.
 174   std::string user_id_hash = chromeos::LoginState::Get()->primary_user_hash();
 175   ::onc::ONCSource onc_source = ::onc::ONC_SOURCE_NONE;
 176   NetworkHandler::Get()
 177       ->managed_network_configuration_handler()
 178       ->FindPolicyByGUID(user_id_hash, network->guid(), &onc_source);
 179
 180   scoped_ptr<base::DictionaryValue> onc_dictionary =
 181       TranslateShillServiceToONCPart(*shill_dictionary, onc_source,
 182                                      &onc::kNetworkWithStateSignature, network);
 183   return onc_dictionary.Pass();
 184 }
 185
 186 scoped_ptr<base::ListValue> TranslateNetworkListToONC(
 187     NetworkTypePattern pattern,
 188     bool configured_only,
 189     bool visible_only,
 190     int limit) {
 191   NetworkStateHandler::NetworkStateList network_states;
 192   NetworkHandler::Get()->network_state_handler()->GetNetworkListByType(
 193       pattern, configured_only, visible_only, limit, &network_states);
 194
 195   scoped_ptr<base::ListValue> network_properties_list(new base::ListValue);
 196   for (const NetworkState* state : network_states) {
 197     scoped_ptr<base::DictionaryValue> onc_dictionary =
 198         TranslateNetworkStateToONC(state);
 199     network_properties_list->Append(onc_dictionary.release());
 200   }
 201   return network_properties_list.Pass();
 202 }
 203
 204 std::string TranslateONCTypeToShill(const std::string& onc_type) {
 205   if (onc_type == ::onc::network_type::kEthernet)
 206     return shill::kTypeEthernet;
 207   std::string shill_type;
 208   onc::TranslateStringToShill(onc::kNetworkTypeTable, onc_type, &shill_type);
 209   return shill_type;
 210 }
 211
 212 std::string TranslateShillTypeToONC(const std::string& shill_type) {
 213   if (shill_type == shill::kTypeEthernet)
 214     return ::onc::network_type::kEthernet;
 215   std::string onc_type;
 216   onc::TranslateStringToONC(onc::kNetworkTypeTable, shill_type, &onc_type);
 217   return onc_type;
 218 }
 219
 220 }  // namespace network_util
 221 }  // namespace chromeos