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/*
* 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;
import java.io.IOException;
/**
* This class carries the payload of a Hotspot 2.0 Wireless Network Management (WNM) frame,
* described in the Hotspot 2.0 spec, section 3.2.
*/
public class WnmData {
private static final int ESS = 1; // HS2.0 spec section 3.2.1.2, table 4
private final long mBssid;
private final String mUrl;
private final boolean mDeauthEvent;
private final int mMethod;
private final boolean mEss;
private final int mDelay;
public static WnmData buildWnmData(String event) throws IOException {
// %012x HS20-SUBSCRIPTION-REMEDIATION "%u %s", osu_method, url
// %012x HS20-DEAUTH-IMMINENT-NOTICE "%u %u %s", code, reauth_delay, url
String[] segments = event.split(" ");
if (segments.length < 2) {
throw new IOException("Short event");
}
switch (segments[1]) {
case WifiMonitor.HS20_SUB_REM_STR: {
if (segments.length != 4) {
throw new IOException("Expected 4 segments");
}
return new WnmData(Long.parseLong(segments[0], 16),
segments[3],
Integer.parseInt(segments[2]));
}
case WifiMonitor.HS20_DEAUTH_STR: {
if (segments.length != 5) {
throw new IOException("Expected 5 segments");
}
int codeID = Integer.parseInt(segments[2]);
if (codeID < 0 || codeID > ESS) {
throw new IOException("Unknown code");
}
return new WnmData(Long.parseLong(segments[0], 16),
segments[4],
codeID == ESS,
Integer.parseInt(segments[3]));
}
default:
throw new IOException("Unknown event type");
}
}
private WnmData(long bssid, String url, int method) {
mBssid = bssid;
mUrl = url;
mMethod = method;
mEss = false;
mDelay = -1;
mDeauthEvent = false;
}
private WnmData(long bssid, String url, boolean ess, int delay) {
mBssid = bssid;
mUrl = url;
mEss = ess;
mDelay = delay;
mMethod = -1;
mDeauthEvent = true;
}
public long getBssid() {
return mBssid;
}
public String getUrl() {
return mUrl;
}
public boolean isDeauthEvent() {
return mDeauthEvent;
}
public int getMethod() {
return mMethod;
}
public boolean isEss() {
return mEss;
}
public int getDelay() {
return mDelay;
}
}
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