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_tokenizer.h"
   8 #include "base/strings/string_util.h"
   9 #include "base/strings/stringprintf.h"
  10 #include "chromeos/network/network_state.h"
  11 #include "chromeos/network/network_state_handler.h"
  12 #include "chromeos/network/onc/onc_signature.h"
  13 #include "chromeos/network/onc/onc_translation_tables.h"
  14 #include "chromeos/network/onc/onc_translator.h"
  15 #include "third_party/cros_system_api/dbus/service_constants.h"
  16
  17 namespace chromeos {
  18
  19 WifiAccessPoint::WifiAccessPoint()
  20     : signal_strength(0),
  21       signal_to_noise(0),
  22       channel(0) {
  23 }
  24
  25 WifiAccessPoint::~WifiAccessPoint() {
  26 }
  27
  28 CellularScanResult::CellularScanResult() {
  29 }
  30
  31 CellularScanResult::~CellularScanResult() {
  32 }
  33
  34 namespace network_util {
  35
  36 std::string PrefixLengthToNetmask(int32 prefix_length) {
  37   std::string netmask;
  38   // Return the empty string for invalid inputs.
  39   if (prefix_length < 0 || prefix_length > 32)
  40     return netmask;
  41   for (int i = 0; i < 4; i++) {
  42     int remainder = 8;
  43     if (prefix_length >= 8) {
  44       prefix_length -= 8;
  45     } else {
  46       remainder = prefix_length;
  47       prefix_length = 0;
  48     }
  49     if (i > 0)
  50       netmask += ".";
  51     int value = remainder == 0 ? 0 :
  52         ((2L << (remainder - 1)) - 1) << (8 - remainder);
  53     netmask += base::StringPrintf("%d", value);
  54   }
  55   return netmask;
  56 }
  57
  58 int32 NetmaskToPrefixLength(const std::string& netmask) {
  59   int count = 0;
  60   int prefix_length = 0;
  61   base::StringTokenizer t(netmask, ".");
  62   while (t.GetNext()) {
  63     // If there are more than 4 numbers, then it's invalid.
  64     if (count == 4)
  65       return -1;
  66
  67     std::string token = t.token();
  68     // If we already found the last mask and the current one is not
  69     // "0" then the netmask is invalid. For example, 255.224.255.0
  70     if (prefix_length / 8 != count) {
  71       if (token != "0")
  72         return -1;
  73     } else if (token == "255") {
  74       prefix_length += 8;
  75     } else if (token == "254") {
  76       prefix_length += 7;
  77     } else if (token == "252") {
  78       prefix_length += 6;
  79     } else if (token == "248") {
  80       prefix_length += 5;
  81     } else if (token == "240") {
  82       prefix_length += 4;
  83     } else if (token == "224") {
  84       prefix_length += 3;
  85     } else if (token == "192") {
  86       prefix_length += 2;
  87     } else if (token == "128") {
  88       prefix_length += 1;
  89     } else if (token == "0") {
  90       prefix_length += 0;
  91     } else {
  92       // mask is not a valid number.
  93       return -1;
  94     }
  95     count++;
  96   }
  97   if (count < 4)
  98     return -1;
  99   return prefix_length;
 100 }
 101
 102 std::string FormattedMacAddress(const std::string& shill_mac_address) {
 103   if (shill_mac_address.size() % 2 != 0)
 104     return shill_mac_address;
 105   std::string result;
 106   for (size_t i = 0; i < shill_mac_address.size(); ++i) {
 107     if ((i != 0) && (i % 2 == 0))
 108       result.push_back(':');
 109     result.push_back(base::ToUpperASCII(shill_mac_address[i]));
 110   }
 111   return result;
 112 }
 113
 114 bool ParseCellularScanResults(const base::ListValue& list,
 115                               std::vector<CellularScanResult>* scan_results) {
 116   scan_results->clear();
 117   scan_results->reserve(list.GetSize());
 118   for (base::ListValue::const_iterator it = list.begin();
 119        it != list.end(); ++it) {
 120     if (!(*it)->IsType(base::Value::TYPE_DICTIONARY))
 121       return false;
 122     CellularScanResult scan_result;
 123     const base::DictionaryValue* dict =
 124         static_cast<const base::DictionaryValue*>(*it);
 125     // If the network id property is not present then this network cannot be
 126     // connected to so don't include it in the results.
 127     if (!dict->GetStringWithoutPathExpansion(shill::kNetworkIdProperty,
 128                                              &scan_result.network_id))
 129       continue;
 130     dict->GetStringWithoutPathExpansion(shill::kStatusProperty,
 131                                         &scan_result.status);
 132     dict->GetStringWithoutPathExpansion(shill::kLongNameProperty,
 133                                         &scan_result.long_name);
 134     dict->GetStringWithoutPathExpansion(shill::kShortNameProperty,
 135                                         &scan_result.short_name);
 136     dict->GetStringWithoutPathExpansion(shill::kTechnologyProperty,
 137                                         &scan_result.technology);
 138     scan_results->push_back(scan_result);
 139   }
 140   return true;
 141 }
 142
 143 scoped_ptr<base::DictionaryValue> TranslateNetworkStateToONC(
 144     const NetworkState* network) {
 145   // Get the properties from the NetworkState.
 146   base::DictionaryValue shill_dictionary;
 147   network->GetStateProperties(&shill_dictionary);
 148
 149   scoped_ptr<base::DictionaryValue> onc_dictionary =
 150       TranslateShillServiceToONCPart(
 151           shill_dictionary, &onc::kNetworkWithStateSignature);
 152   return onc_dictionary.Pass();
 153 }
 154
 155 scoped_ptr<base::ListValue> TranslateNetworkListToONC(
 156     NetworkTypePattern pattern,
 157     bool configured_only,
 158     bool visible_only,
 159     int limit,
 160     bool debugging_properties) {
 161   NetworkStateHandler::NetworkStateList network_states;
 162   NetworkHandler::Get()->network_state_handler()->GetNetworkListByType(
 163       pattern, configured_only, visible_only, limit, &network_states);
 164
 165   scoped_ptr<base::ListValue> network_properties_list(new base::ListValue);
 166   for (NetworkStateHandler::NetworkStateList::iterator it =
 167            network_states.begin();
 168        it != network_states.end();
 169        ++it) {
 170     scoped_ptr<base::DictionaryValue> onc_dictionary =
 171         TranslateNetworkStateToONC(*it);
 172
 173     if (debugging_properties) {
 174       onc_dictionary->SetBoolean("connectable", (*it)->connectable());
 175       onc_dictionary->SetBoolean("visible", (*it)->visible());
 176       onc_dictionary->SetString("profile_path", (*it)->profile_path());
 177       onc_dictionary->SetString("service_path", (*it)->path());
 178     }
 179
 180     network_properties_list->Append(onc_dictionary.release());
 181   }
 182   return network_properties_list.Pass();
 183 }
 184
 185 std::string TranslateONCTypeToShill(const std::string& onc_type) {
 186   if (onc_type == ::onc::network_type::kEthernet)
 187     return shill::kTypeEthernet;
 188   std::string shill_type;
 189   onc::TranslateStringToShill(onc::kNetworkTypeTable, onc_type, &shill_type);
 190   return shill_type;
 191 }
 192
 193 }  // namespace network_util
 194 }  // namespace chromeos