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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.server.wifi.hotspot2.anqp;
     18 
     19 import com.android.internal.annotations.VisibleForTesting;
     20 
     21 import java.nio.BufferUnderflowException;
     22 import java.nio.ByteBuffer;
     23 import java.util.ArrayList;
     24 import java.util.Collections;
     25 import java.util.List;
     26 
     27 /**
     28  * The Connection Capability vendor specific ANQP Element,
     29  * Wi-Fi Alliance Hotspot 2.0 (Release 2) Technical Specification - Version 5.00,
     30  * section 4.5
     31  *
     32  * Format:
     33  * | ProtoPort Tuple #1 (optiional) | ....
     34  *                4
     35  */
     36 public class HSConnectionCapabilityElement extends ANQPElement {
     37     private final List<ProtocolPortTuple> mStatusList;
     38 
     39     @VisibleForTesting
     40     public HSConnectionCapabilityElement(List<ProtocolPortTuple> statusList) {
     41         super(Constants.ANQPElementType.HSConnCapability);
     42         mStatusList = statusList;
     43     }
     44 
     45     /**
     46      * Parse a HSConnectionCapabilityElement from the given buffer.
     47      *
     48      * @param payload The byte buffer to read from
     49      * @return {@link HSConnectionCapabilityElement}
     50      * @throws BufferUnderflowException
     51      */
     52     public static HSConnectionCapabilityElement parse(ByteBuffer payload) {
     53         List<ProtocolPortTuple> statusList = new ArrayList<>();
     54         while (payload.hasRemaining()) {
     55             statusList.add(ProtocolPortTuple.parse(payload));
     56         }
     57         return new HSConnectionCapabilityElement(statusList);
     58     }
     59 
     60     public List<ProtocolPortTuple> getStatusList() {
     61         return Collections.unmodifiableList(mStatusList);
     62     }
     63 
     64     @Override
     65     public boolean equals(Object thatObject) {
     66         if (this == thatObject) {
     67             return true;
     68         }
     69         if (!(thatObject instanceof HSConnectionCapabilityElement)) {
     70             return false;
     71         }
     72         HSConnectionCapabilityElement that = (HSConnectionCapabilityElement) thatObject;
     73         return mStatusList.equals(that.mStatusList);
     74     }
     75 
     76     @Override
     77     public int hashCode() {
     78         return mStatusList.hashCode();
     79     }
     80 
     81     @Override
     82     public String toString() {
     83         return "HSConnectionCapability{" +
     84                 "mStatusList=" + mStatusList +
     85                 '}';
     86     }
     87 }
     88