Move Shill property utility functions to a new separate file.

chromeos/network/shill_property_util.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromeos/network/shill_property_util.h"
+
+#include "base/i18n/icu_encoding_detection.h"
+#include "base/i18n/icu_string_conversions.h"
+#include "base/json/json_writer.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversion_utils.h"
+#include "base/values.h"
+#include "chromeos/network/network_event_log.h"
+#include "chromeos/network/network_ui_data.h"
+#include "chromeos/network/onc/onc_utils.h"
+#include "third_party/cros_system_api/dbus/service_constants.h"
+
+namespace chromeos {
+
+namespace shill_property_util {
+
+namespace {
+
+// Replace non UTF8 characters in |str| with a replacement character.
+std::string ValidateUTF8(const std::string& str) {
+  std::string result;
+  for (int32 index = 0; index < static_cast<int32>(str.size()); ++index) {
+    uint32 code_point_out;
+    bool is_unicode_char = base::ReadUnicodeCharacter(
+        str.c_str(), str.size(), &index, &code_point_out);
+    const uint32 kFirstNonControlChar = 0x20;
+    if (is_unicode_char && (code_point_out >= kFirstNonControlChar)) {
+      base::WriteUnicodeCharacter(code_point_out, &result);
+    } else {
+      const uint32 kReplacementChar = 0xFFFD;
+      // Puts kReplacementChar if character is a control character [0,0x20)
+      // or is not readable UTF8.
+      base::WriteUnicodeCharacter(kReplacementChar, &result);
+    }
+  }
+  return result;
+}
+
+void CopyStringFromDictionary(const base::DictionaryValue& source,
+                              const std::string& key,
+                              base::DictionaryValue* dest) {
+  std::string string_value;
+  if (source.GetStringWithoutPathExpansion(key, &string_value))
+    dest->SetStringWithoutPathExpansion(key, string_value);
+}
+
+}  // namespace
+
+std::string GetNameFromProperties(const std::string& service_path,
+                                  const base::DictionaryValue& properties) {
+  std::string name, hex_ssid;
+  properties.GetStringWithoutPathExpansion(flimflam::kNameProperty, &name);
+  properties.GetStringWithoutPathExpansion(flimflam::kWifiHexSsid, &hex_ssid);
+
+  if (hex_ssid.empty()) {
+    if (name.empty())
+      return name;
+    // Validate name for UTF8.
+    std::string valid_ssid = ValidateUTF8(name);
+    if (valid_ssid != name) {
+      NET_LOG_DEBUG(
+          "GetNameFromProperties",
+          base::StringPrintf(
+              "%s: UTF8: %s", service_path.c_str(), valid_ssid.c_str()));
+    }
+    return valid_ssid;
+  }
+
+  std::string ssid;
+  std::vector<uint8> raw_ssid_bytes;
+  if (base::HexStringToBytes(hex_ssid, &raw_ssid_bytes)) {
+    ssid = std::string(raw_ssid_bytes.begin(), raw_ssid_bytes.end());
+    NET_LOG_DEBUG("GetNameFromProperties",
+                  base::StringPrintf("%s: %s, SSID: %s",
+                                     service_path.c_str(),
+                                     hex_ssid.c_str(),
+                                     ssid.c_str()));
+  } else {
+    NET_LOG_ERROR("GetNameFromProperties",
+                  base::StringPrintf("%s: Error processing: %s",
+                                     service_path.c_str(),
+                                     hex_ssid.c_str()));
+    return name;
+  }
+
+  if (IsStringUTF8(ssid)) {
+    if (ssid != name) {
+      NET_LOG_DEBUG("GetNameFromProperties",
+                    base::StringPrintf(
+                        "%s: UTF8: %s", service_path.c_str(), ssid.c_str()));
+    }
+    return ssid;
+  }
+
+  // Detect encoding and convert to UTF-8.
+  std::string country_code;
+  properties.GetStringWithoutPathExpansion(flimflam::kCountryProperty,
+                                           &country_code);
+  std::string encoding;
+  if (!base::DetectEncoding(ssid, &encoding)) {
+    // TODO(stevenjb): This is currently experimental. If we find a case where
+    // base::DetectEncoding() fails, we need to figure out whether we can use
+    // country_code with ConvertToUtf8(). crbug.com/233267.
+    encoding = country_code;
+  }
+  if (!encoding.empty()) {
+    std::string utf8_ssid;
+    if (base::ConvertToUtf8AndNormalize(ssid, encoding, &utf8_ssid)) {
+      if (utf8_ssid != name) {
+        NET_LOG_DEBUG("GetNameFromProperties",
+                      base::StringPrintf("%s: Encoding=%s: %s",
+                                         service_path.c_str(),
+                                         encoding.c_str(),
+                                         utf8_ssid.c_str()));
+      }
+      return utf8_ssid;
+    }
+  }
+
+  // Unrecognized encoding. Only use raw bytes if name_ is empty.
+  NET_LOG_DEBUG("GetNameFromProperties",
+                base::StringPrintf("%s: Unrecognized Encoding=%s: %s",
+                                   service_path.c_str(),
+                                   encoding.c_str(),
+                                   ssid.c_str()));
+  if (name.empty() && !ssid.empty())
+    return ssid;
+  return name;
+}
+
+scoped_ptr<NetworkUIData> GetUIDataFromValue(const base::Value& ui_data_value) {
+  std::string ui_data_str;
+  if (!ui_data_value.GetAsString(&ui_data_str))
+    return scoped_ptr<NetworkUIData>();
+  if (ui_data_str.empty())
+    return make_scoped_ptr(new NetworkUIData());
+  scoped_ptr<base::DictionaryValue> ui_data_dict(
+      chromeos::onc::ReadDictionaryFromJson(ui_data_str));
+  if (!ui_data_dict)
+    return scoped_ptr<NetworkUIData>();
+  return make_scoped_ptr(new NetworkUIData(*ui_data_dict));
+}
+
+scoped_ptr<NetworkUIData> GetUIDataFromProperties(
+    const base::DictionaryValue& shill_dictionary) {
+  const base::Value* ui_data_value = NULL;
+  shill_dictionary.GetWithoutPathExpansion(flimflam::kUIDataProperty,
+                                           &ui_data_value);
+  if (!ui_data_value) {
+    VLOG(2) << "Dictionary has no UIData entry.";
+    return scoped_ptr<NetworkUIData>();
+  }
+  scoped_ptr<NetworkUIData> ui_data = GetUIDataFromValue(*ui_data_value);
+  if (!ui_data)
+    LOG(ERROR) << "UIData is not a valid JSON dictionary.";
+  return ui_data.Pass();
+}
+
+void SetUIData(const NetworkUIData& ui_data,
+               base::DictionaryValue* shill_dictionary) {
+  base::DictionaryValue ui_data_dict;
+  ui_data.FillDictionary(&ui_data_dict);
+  std::string ui_data_blob;
+  base::JSONWriter::Write(&ui_data_dict, &ui_data_blob);
+  shill_dictionary->SetStringWithoutPathExpansion(flimflam::kUIDataProperty,
+                                                  ui_data_blob);
+}
+
+bool CopyIdentifyingProperties(const base::DictionaryValue& service_properties,
+                               base::DictionaryValue* dest) {
+  CopyStringFromDictionary(service_properties, flimflam::kGuidProperty, dest);
+
+  std::string type;
+  service_properties.GetStringWithoutPathExpansion(flimflam::kTypeProperty,
+                                                   &type);
+  dest->SetStringWithoutPathExpansion(flimflam::kTypeProperty, type);
+  if (type == flimflam::kTypeWifi) {
+    CopyStringFromDictionary(
+        service_properties, flimflam::kSecurityProperty, dest);
+    CopyStringFromDictionary(service_properties, flimflam::kSSIDProperty, dest);
+    CopyStringFromDictionary(service_properties, flimflam::kModeProperty, dest);
+  } else if (type == flimflam::kTypeVPN) {
+    CopyStringFromDictionary(service_properties, flimflam::kNameProperty, dest);
+    // VPN Provider values are read from the "Provider" dictionary, but written
+    // with the keys "Provider.Type" and "Provider.Host".
+    const base::DictionaryValue* provider_properties;
+    if (!service_properties.GetDictionaryWithoutPathExpansion(
+             flimflam::kProviderProperty, &provider_properties)) {
+      LOG(ERROR) << "Incomplete Shill dictionary missing VPN provider dict.";
+      return false;
+    }
+    std::string vpn_provider_type;
+    provider_properties->GetStringWithoutPathExpansion(flimflam::kTypeProperty,
+                                                       &vpn_provider_type);
+    dest->SetStringWithoutPathExpansion(flimflam::kProviderTypeProperty,
+                                        vpn_provider_type);
+
+    std::string vpn_provider_host;
+    provider_properties->GetStringWithoutPathExpansion(flimflam::kHostProperty,
+                                                       &vpn_provider_host);
+    dest->SetStringWithoutPathExpansion(flimflam::kProviderHostProperty,
+                                        vpn_provider_host);
+  } else if (type == flimflam::kTypeEthernet ||
+             type == shill::kTypeEthernetEap) {
+    // Ethernet and EthernetEAP don't have any additional identifying
+    // properties.
+  } else {
+    NOTREACHED() << "Unsupported network type " << type;
+  }
+  return true;
+}
+
+}  // namespace shill_property_util
+
+}  // namespace chromeos