| /* |
| * Copyright (C) 2020 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; |
| |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.server.wifi.ByteBufferReader; |
| |
| import java.net.ProtocolException; |
| import java.net.URL; |
| import java.nio.BufferUnderflowException; |
| import java.nio.ByteBuffer; |
| import java.nio.charset.StandardCharsets; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * The Venue URL ANQP Element, IEEE802.11-2016 section 9.4.5.20. |
| * |
| * Format: |
| * |
| * | Venue URL Duples | |
| * variable |
| * |
| * Venue URL Duple: |
| * | Length | Venue Number | Venue URL Duple #1 (optional) | ... |
| * 1 1 variable |
| */ |
| public class VenueUrlElement extends ANQPElement { |
| private final Map<Integer, URL> mVenueUrls; |
| private static final String TAG = "VenueUrlElement"; |
| |
| @VisibleForTesting |
| public VenueUrlElement(Map<Integer, URL> venueUrls) { |
| super(Constants.ANQPElementType.ANQPVenueUrl); |
| mVenueUrls = venueUrls; |
| } |
| |
| /** |
| * Parse a VenueUrlElement from the given buffer. |
| * |
| * @param payload The byte buffer to read from |
| * @return {@link VenueUrlElement} |
| * @throws BufferUnderflowException |
| * @throws ProtocolException |
| */ |
| public static VenueUrlElement parse(ByteBuffer payload) |
| throws ProtocolException, BufferUnderflowException { |
| Map<Integer, URL> venueUrls = new HashMap<>(); |
| while (payload.remaining() >= 2) { |
| int length = payload.get() & 0xFF; |
| int venueNumber = payload.get() & 0xFF; |
| if (venueNumber == 0) { |
| // In case no Venue Name Tuple subfield was returned in the Venue Name ANQP-element |
| break; |
| } |
| String parsedUrl = ByteBufferReader.readString(payload, length - 1, |
| StandardCharsets.UTF_8); |
| URL url; |
| try { |
| url = new URL(parsedUrl); |
| } catch (java.net.MalformedURLException e) { |
| Log.e(TAG, "Malformed venue URL: " + parsedUrl + " at index " + venueNumber); |
| throw new ProtocolException("Malformed venue URL: " + parsedUrl + " at index " |
| + venueNumber); |
| } |
| // Reject URLs that are not HTTPS |
| String protocol = url.getProtocol(); |
| if (!TextUtils.equals(protocol, "https")) { |
| Log.w(TAG, "Non-HTTPS Venue URL dropped: " + url); |
| } else { |
| venueUrls.put(Integer.valueOf(venueNumber), url); |
| } |
| } |
| |
| return new VenueUrlElement(venueUrls); |
| } |
| |
| public Map<Integer, URL> getVenueUrls() { |
| return mVenueUrls; |
| } |
| |
| @Override |
| public boolean equals(Object thatObject) { |
| if (this == thatObject) { |
| return true; |
| } |
| if (!(thatObject instanceof VenueUrlElement)) { |
| return false; |
| } |
| VenueUrlElement that = (VenueUrlElement) thatObject; |
| return mVenueUrls.equals(that.mVenueUrls); |
| } |
| |
| @Override |
| public int hashCode() { |
| return mVenueUrls.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return "VenueUrl{ mUrlList=" + mVenueUrls + "}"; |
| } |
| |
| } |