content: /*
   * Copyright (C) 2016 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.server.wifi.hotspot2.anqp.eap;
  
  import com.android.internal.annotations.VisibleForTesting;
  
  import java.net.ProtocolException;
  import java.nio.BufferUnderflowException;
  import java.nio.ByteBuffer;
  
  /**
   * The Inner Authentication EAP Method Type authentication parameter, IEEE802.11-2012, table 8-188.
   *
   * Format:
   * | EAP Method ID |
   *         1
   */
  public class InnerAuthEAP extends AuthParam {
      @VisibleForTesting
      public static final int EXPECTED_LENGTH_VALUE = 1;
  
      private final int mEAPMethodID;
  
      @VisibleForTesting
      public InnerAuthEAP(int eapMethodID) {
          super(AuthParam.PARAM_TYPE_INNER_AUTH_EAP_METHOD_TYPE);
          mEAPMethodID = eapMethodID;
      }
  
      /**
       * Parse a InnerAuthEAP from the given buffer.
       *
       * @param payload The byte buffer to read from
       * @param length The length of the data
       * @return {@link InnerAuthEAP}
       * @throws ProtocolException
       * @throws BufferUnderflowException
       */
      public static InnerAuthEAP parse(ByteBuffer payload, int length) throws ProtocolException {
          if (length != EXPECTED_LENGTH_VALUE) {
              throw new ProtocolException("Invalid length: " + length);
          }
          int eapMethodID = payload.get() & 0xFF;
          return new InnerAuthEAP(eapMethodID);
      }
  
      public int getEAPMethodID() {
          return mEAPMethodID;
      }
  
      @Override
      public boolean equals(Object thatObject) {
          if (thatObject == this) {
              return true;
          }
          if (!(thatObject instanceof InnerAuthEAP)) {
              return false;
          }
          InnerAuthEAP that = (InnerAuthEAP) thatObject;
          return mEAPMethodID == that.mEAPMethodID;
      }
  
      @Override
      public int hashCode() {
          return mEAPMethodID;
      }
  
      @Override
      public String toString() {
          return "InnerAuthEAP{mEAPMethodID=" + mEAPMethodID + "}";
      }
  }
  