/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.wifi;
import android.content.Context;
import android.net.NetworkInfo.DetailedState;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiConfiguration.KeyMgmt;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.preference.Preference;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import com.android.settings.R;
class AccessPoint extends Preference {
static final String TAG = "Settings.AccessPoint";
private static final String KEY_DETAILEDSTATE = "key_detailedstate";
private static final String KEY_WIFIINFO = "key_wifiinfo";
private static final String KEY_SCANRESULT = "key_scanresult";
private static final String KEY_CONFIG = "key_config";
private static final int[] STATE_SECURED = {
R.attr.state_encrypted
};
private static final int[] STATE_NONE = {};
/** These values are matched in string arrays -- changes must be kept in sync */
static final int SECURITY_NONE = 0;
static final int SECURITY_WEP = 1;
static final int SECURITY_PSK = 2;
static final int SECURITY_EAP = 3;
enum PskType {
UNKNOWN,
WPA,
WPA2,
WPA_WPA2
}
String ssid;
String bssid;
int security;
int networkId;
boolean wpsAvailable = false;
PskType pskType = PskType.UNKNOWN;
private WifiConfiguration mConfig;
/* package */ScanResult mScanResult;
private int mRssi;
private WifiInfo mInfo;
private DetailedState mState;
static int getSecurity(WifiConfiguration config) {
if (config.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {
return SECURITY_PSK;
}
if (config.allowedKeyManagement.get(KeyMgmt.WPA_EAP) ||
config.allowedKeyManagement.get(KeyMgmt.IEEE8021X)) {
return SECURITY_EAP;
}
return (config.wepKeys[0] != null) ? SECURITY_WEP : SECURITY_NONE;
}
private static int getSecurity(ScanResult result) {
if (result.capabilities.contains("WEP")) {
return SECURITY_WEP;
} else if (result.capabilities.contains("PSK")) {
return SECURITY_PSK;
} else if (result.capabilities.contains("EAP")) {
return SECURITY_EAP;
}
return SECURITY_NONE;
}
public String getSecurityString(boolean concise) {
Context context = getContext();
switch(security) {
case SECURITY_EAP:
return concise ? context.getString(R.string.wifi_security_short_eap) :
context.getString(R.string.wifi_security_eap);
case SECURITY_PSK:
switch (pskType) {
case WPA:
return concise ? context.getString(R.string.wifi_security_short_wpa) :
context.getString(R.string.wifi_security_wpa);
case WPA2:
return concise ? context.getString(R.string.wifi_security_short_wpa2) :
context.getString(R.string.wifi_security_wpa2);
case WPA_WPA2:
return concise ? context.getString(R.string.wifi_security_short_wpa_wpa2) :
context.getString(R.string.wifi_security_wpa_wpa2);
case UNKNOWN:
default:
return concise ? context.getString(R.string.wifi_security_short_psk_generic)
: context.getString(R.string.wifi_security_psk_generic);
}
case SECURITY_WEP:
return concise ? context.getString(R.string.wifi_security_short_wep) :
context.getString(R.string.wifi_security_wep);
case SECURITY_NONE:
default:
return concise ? "" : context.getString(R.string.wifi_security_none);
}
}
private static PskType getPskType(ScanResult result) {
boolean wpa = result.capabilities.contains("WPA-PSK");
boolean wpa2 = result.capabilities.contains("WPA2-PSK");
if (wpa2 && wpa) {
return PskType.WPA_WPA2;
} else if (wpa2) {
return PskType.WPA2;
} else if (wpa) {
return PskType.WPA;
} else {
Log.w(TAG, "Received abnormal flag string: " + result.capabilities);
return PskType.UNKNOWN;
}
}
AccessPoint(Context context, WifiConfiguration config) {
super(context);
setWidgetLayoutResource(R.layout.preference_widget_wifi_signal);
loadConfig(config);
refresh();
}
AccessPoint(Context context, ScanResult result) {
super(context);
setWidgetLayoutResource(R.layout.preference_widget_wifi_signal);
loadResult(result);
refresh();
}
AccessPoint(Context context, Bundle savedState) {
super(context);
setWidgetLayoutResource(R.layout.preference_widget_wifi_signal);
mConfig = savedState.getParcelable(KEY_CONFIG);
if (mConfig != null) {
loadConfig(mConfig);
}
mScanResult = (ScanResult) savedState.getParcelable(KEY_SCANRESULT);
if (mScanResult != null) {
loadResult(mScanResult);
}
mInfo = (WifiInfo) savedState.getParcelable(KEY_WIFIINFO);
if (savedState.containsKey(KEY_DETAILEDSTATE)) {
mState = DetailedState.valueOf(savedState.getString(KEY_DETAILEDSTATE));
}
update(mInfo, mState);
}
public void saveWifiState(Bundle savedState) {
savedState.putParcelable(KEY_CONFIG, mConfig);
savedState.putParcelable(KEY_SCANRESULT, mScanResult);
savedState.putParcelable(KEY_WIFIINFO, mInfo);
if (mState != null) {
savedState.putString(KEY_DETAILEDSTATE, mState.toString());
}
}
private void loadConfig(WifiConfiguration config) {
ssid = (config.SSID == null ? "" : removeDoubleQuotes(config.SSID));
bssid = config.BSSID;
security = getSecurity(config);
networkId = config.networkId;
mRssi = Integer.MAX_VALUE;
mConfig = config;
}
private void loadResult(ScanResult result) {
ssid = result.SSID;
bssid = result.BSSID;
security = getSecurity(result);
wpsAvailable = security != SECURITY_EAP && result.capabilities.contains("WPS");
if (security == SECURITY_PSK)
pskType = getPskType(result);
networkId = -1;
mRssi = result.level;
mScanResult = result;
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
ImageView signal = (ImageView) view.findViewById(R.id.signal);
if (mRssi == Integer.MAX_VALUE) {
signal.setImageDrawable(null);
} else {
signal.setImageLevel(getLevel());
signal.setImageResource(R.drawable.wifi_signal);
signal.setImageState((security != SECURITY_NONE) ?
STATE_SECURED : STATE_NONE, true);
}
}
@Override
public int compareTo(Preference preference) {
if (!(preference instanceof AccessPoint)) {
return 1;
}
AccessPoint other = (AccessPoint) preference;
// Active one goes first.
if (mInfo != other.mInfo) {
return (mInfo != null) ? -1 : 1;
}
// Reachable one goes before unreachable one.
if ((mRssi ^ other.mRssi) < 0) {
return (mRssi != Integer.MAX_VALUE) ? -1 : 1;
}
// Configured one goes before unconfigured one.
if ((networkId ^ other.networkId) < 0) {
return (networkId != -1) ? -1 : 1;
}
// Sort by signal strength.
int difference = WifiManager.compareSignalLevel(other.mRssi, mRssi);
if (difference != 0) {
return difference;
}
// Sort by ssid.
return ssid.compareToIgnoreCase(other.ssid);
}
boolean update(ScanResult result) {
if (ssid.equals(result.SSID) && security == getSecurity(result)) {
if (WifiManager.compareSignalLevel(result.level, mRssi) > 0) {
int oldLevel = getLevel();
mRssi = result.level;
if (getLevel() != oldLevel) {
notifyChanged();
}
}
// This flag only comes from scans, is not easily saved in config
if (security == SECURITY_PSK) {
pskType = getPskType(result);
}
refresh();
return true;
}
return false;
}
void update(WifiInfo info, DetailedState state) {
boolean reorder = false;
if (info != null && networkId != WifiConfiguration.INVALID_NETWORK_ID
&& networkId == info.getNetworkId()) {
reorder = (mInfo == null);
mRssi = info.getRssi();
mInfo = info;
mState = state;
refresh();
} else if (mInfo != null) {
reorder = true;
mInfo = null;
mState = null;
refresh();
}
if (reorder) {
notifyHierarchyChanged();
}
}
int getLevel() {
if (mRssi == Integer.MAX_VALUE) {
return -1;
}
return WifiManager.calculateSignalLevel(mRssi, 4);
}
WifiConfiguration getConfig() {
return mConfig;
}
WifiInfo getInfo() {
return mInfo;
}
DetailedState getState() {
return mState;
}
static String removeDoubleQuotes(String string) {
int length = string.length();
if ((length > 1) && (string.charAt(0) == '"')
&& (string.charAt(length - 1) == '"')) {
return string.substring(1, length - 1);
}
return string;
}
static String convertToQuotedString(String string) {
return "\"" + string + "\"";
}
/** Updates the title and summary; may indirectly call notifyChanged() */
private void refresh() {
setTitle(ssid);
Context context = getContext();
if (mState != null) { // This is the active connection
setSummary(Summary.get(context, mState));
} else if (mRssi == Integer.MAX_VALUE) { // Wifi out of range
setSummary(context.getString(R.string.wifi_not_in_range));
} else if (mConfig != null && mConfig.status == WifiConfiguration.Status.DISABLED) {
switch (mConfig.disableReason) {
case WifiConfiguration.DISABLED_AUTH_FAILURE:
setSummary(context.getString(R.string.wifi_disabled_password_failure));
break;
case WifiConfiguration.DISABLED_DHCP_FAILURE:
case WifiConfiguration.DISABLED_DNS_FAILURE:
setSummary(context.getString(R.string.wifi_disabled_network_failure));
break;
case WifiConfiguration.DISABLED_UNKNOWN_REASON:
setSummary(context.getString(R.string.wifi_disabled_generic));
}
} else { // In range, not disabled.
StringBuilder summary = new StringBuilder();
if (mConfig != null) { // Is saved network
summary.append(context.getString(R.string.wifi_remembered));
}
if (security != SECURITY_NONE) {
String securityStrFormat;
if (summary.length() == 0) {
securityStrFormat = context.getString(R.string.wifi_secured_first_item);
} else {
securityStrFormat = context.getString(R.string.wifi_secured_second_item);
}
summary.append(String.format(securityStrFormat, getSecurityString(true)));
}
if (mConfig == null && wpsAvailable) { // Only list WPS available for unsaved networks
if (summary.length() == 0) {
summary.append(context.getString(R.string.wifi_wps_available_first_item));
} else {
summary.append(context.getString(R.string.wifi_wps_available_second_item));
}
}
setSummary(summary.toString());
}
}
/**
* Generate and save a default wifiConfiguration with common values.
* Can only be called for unsecured networks.
* @hide
*/
protected void generateOpenNetworkConfig() {
if (security != SECURITY_NONE)
throw new IllegalStateException();
if (mConfig != null)
return;
mConfig = new WifiConfiguration();
mConfig.SSID = AccessPoint.convertToQuotedString(ssid);
mConfig.allowedKeyManagement.set(KeyMgmt.NONE);
}
}