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// Copyright (c) 2012 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/network_util.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "chromeos/network/network_state.h"
#include "chromeos/network/network_state_handler.h"
#include "chromeos/network/onc/onc_signature.h"
#include "chromeos/network/onc/onc_translation_tables.h"
#include "chromeos/network/onc/onc_translator.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
WifiAccessPoint::WifiAccessPoint()
: signal_strength(0),
signal_to_noise(0),
channel(0) {
}
WifiAccessPoint::~WifiAccessPoint() {
}
CellularScanResult::CellularScanResult() {
}
CellularScanResult::~CellularScanResult() {
}
namespace network_util {
std::string PrefixLengthToNetmask(int32 prefix_length) {
std::string netmask;
// Return the empty string for invalid inputs.
if (prefix_length < 0 || prefix_length > 32)
return netmask;
for (int i = 0; i < 4; i++) {
int remainder = 8;
if (prefix_length >= 8) {
prefix_length -= 8;
} else {
remainder = prefix_length;
prefix_length = 0;
}
if (i > 0)
netmask += ".";
int value = remainder == 0 ? 0 :
((2L << (remainder - 1)) - 1) << (8 - remainder);
netmask += base::StringPrintf("%d", value);
}
return netmask;
}
int32 NetmaskToPrefixLength(const std::string& netmask) {
int count = 0;
int prefix_length = 0;
base::StringTokenizer t(netmask, ".");
while (t.GetNext()) {
// If there are more than 4 numbers, then it's invalid.
if (count == 4)
return -1;
std::string token = t.token();
// If we already found the last mask and the current one is not
// "0" then the netmask is invalid. For example, 255.224.255.0
if (prefix_length / 8 != count) {
if (token != "0")
return -1;
} else if (token == "255") {
prefix_length += 8;
} else if (token == "254") {
prefix_length += 7;
} else if (token == "252") {
prefix_length += 6;
} else if (token == "248") {
prefix_length += 5;
} else if (token == "240") {
prefix_length += 4;
} else if (token == "224") {
prefix_length += 3;
} else if (token == "192") {
prefix_length += 2;
} else if (token == "128") {
prefix_length += 1;
} else if (token == "0") {
prefix_length += 0;
} else {
// mask is not a valid number.
return -1;
}
count++;
}
if (count < 4)
return -1;
return prefix_length;
}
std::string FormattedMacAddress(const std::string& shill_mac_address) {
if (shill_mac_address.size() % 2 != 0)
return shill_mac_address;
std::string result;
for (size_t i = 0; i < shill_mac_address.size(); ++i) {
if ((i != 0) && (i % 2 == 0))
result.push_back(':');
result.push_back(base::ToUpperASCII(shill_mac_address[i]));
}
return result;
}
bool ParseCellularScanResults(const base::ListValue& list,
std::vector<CellularScanResult>* scan_results) {
scan_results->clear();
scan_results->reserve(list.GetSize());
for (base::ListValue::const_iterator it = list.begin();
it != list.end(); ++it) {
if (!(*it)->IsType(base::Value::TYPE_DICTIONARY))
return false;
CellularScanResult scan_result;
const base::DictionaryValue* dict =
static_cast<const base::DictionaryValue*>(*it);
// If the network id property is not present then this network cannot be
// connected to so don't include it in the results.
if (!dict->GetStringWithoutPathExpansion(shill::kNetworkIdProperty,
&scan_result.network_id))
continue;
dict->GetStringWithoutPathExpansion(shill::kStatusProperty,
&scan_result.status);
dict->GetStringWithoutPathExpansion(shill::kLongNameProperty,
&scan_result.long_name);
dict->GetStringWithoutPathExpansion(shill::kShortNameProperty,
&scan_result.short_name);
dict->GetStringWithoutPathExpansion(shill::kTechnologyProperty,
&scan_result.technology);
scan_results->push_back(scan_result);
}
return true;
}
scoped_ptr<base::DictionaryValue> TranslateNetworkStateToONC(
const NetworkState* network) {
// Get the properties from the NetworkState.
base::DictionaryValue shill_dictionary;
network->GetStateProperties(&shill_dictionary);
scoped_ptr<base::DictionaryValue> onc_dictionary =
TranslateShillServiceToONCPart(shill_dictionary,
::onc::ONC_SOURCE_UNKNOWN,
&onc::kNetworkWithStateSignature);
return onc_dictionary.Pass();
}
scoped_ptr<base::ListValue> TranslateNetworkListToONC(
NetworkTypePattern pattern,
bool configured_only,
bool visible_only,
int limit,
bool debugging_properties) {
NetworkStateHandler::NetworkStateList network_states;
NetworkHandler::Get()->network_state_handler()->GetNetworkListByType(
pattern, configured_only, visible_only, limit, &network_states);
scoped_ptr<base::ListValue> network_properties_list(new base::ListValue);
for (NetworkStateHandler::NetworkStateList::iterator it =
network_states.begin();
it != network_states.end();
++it) {
scoped_ptr<base::DictionaryValue> onc_dictionary =
TranslateNetworkStateToONC(*it);
if (debugging_properties) {
onc_dictionary->SetBoolean("connectable", (*it)->connectable());
onc_dictionary->SetBoolean("visible", (*it)->visible());
onc_dictionary->SetString("profile_path", (*it)->profile_path());
onc_dictionary->SetString("service_path", (*it)->path());
}
network_properties_list->Append(onc_dictionary.release());
}
return network_properties_list.Pass();
}
std::string TranslateONCTypeToShill(const std::string& onc_type) {
if (onc_type == ::onc::network_type::kEthernet)
return shill::kTypeEthernet;
std::string shill_type;
onc::TranslateStringToShill(onc::kNetworkTypeTable, onc_type, &shill_type);
return shill_type;
}
} // namespace network_util
} // namespace chromeos
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