738803fee6
Create new (hidden) APIs to scan a specified channel set. This is mainly for location service for now, as doing frequent full scans (including DFS channel) kills battery. This set of new APIs contains: - API to query available channel list for scanning, and DFS channels are marked - API to scan a specified channel set Selective scan results are returned in the same way as normal full scan ones. In order not to intrude full scan results, BSS_FLUSH is NOT performed before a selective scan. Therefore, selective scan results may contain results that's not in the given channel set, and post-filtering may be required for location service use. Bug: 12610436 Change-Id: Icced18dd9b54f6dd92c0c2874d31518d56af8163
88 lines
2.4 KiB
Java
88 lines
2.4 KiB
Java
/*
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* Copyright (c) 2014, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.net.wifi;
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import android.os.Parcel;
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import android.os.Parcelable;
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/**
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* Wifi Channel
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*
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* @see ScanSettings
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*
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* @hide
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*/
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public class WifiChannel implements Parcelable {
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private static final int MIN_FREQ_MHZ = 2412;
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private static final int MAX_FREQ_MHZ = 5825;
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private static final int MIN_CHANNEL_NUM = 1;
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private static final int MAX_CHANNEL_NUM = 196;
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/** frequency */
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public int freqMHz;
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/** channel number */
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public int channelNum;
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/** is it a DFS channel? */
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public boolean isDFS;
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/** public constructor */
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public WifiChannel() { }
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/** check for validity */
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public boolean isValid() {
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if (freqMHz < MIN_FREQ_MHZ || freqMHz > MAX_FREQ_MHZ) return false;
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if (channelNum < MIN_CHANNEL_NUM || channelNum > MAX_CHANNEL_NUM) return false;
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return true;
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}
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/** implement Parcelable interface */
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@Override
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public int describeContents() {
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return 0;
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}
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/** implement Parcelable interface */
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@Override
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public void writeToParcel(Parcel out, int flags) {
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out.writeInt(freqMHz);
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out.writeInt(channelNum);
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out.writeInt(isDFS ? 1 : 0);
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}
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/** implement Parcelable interface */
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public static final Parcelable.Creator<WifiChannel> CREATOR =
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new Parcelable.Creator<WifiChannel>() {
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@Override
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public WifiChannel createFromParcel(Parcel in) {
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WifiChannel channel = new WifiChannel();
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channel.freqMHz = in.readInt();
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channel.channelNum = in.readInt();
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channel.isDFS = in.readInt() != 0;
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return channel;
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}
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@Override
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public WifiChannel[] newArray(int size) {
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return new WifiChannel[size];
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}
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};
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}
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