1/*
2 * Copyright (C) 2012 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
17package android.net.wifi.p2p.nsd;
18
19import android.net.wifi.p2p.WifiP2pDevice;
20
21import java.util.ArrayList;
22import java.util.List;
23
24/**
25 * A class for a response of upnp service discovery.
26 *
27 * @hide
28 */
29public class WifiP2pUpnpServiceResponse extends WifiP2pServiceResponse {
30
31    /**
32     * UPnP version. should be {@link WifiP2pUpnpServiceInfo#VERSION_1_0}
33     */
34    private int mVersion;
35
36    /**
37     * The list of Unique Service Name.
38     * e.g)
39     *{"uuid:6859dede-8574-59ab-9332-123456789012",
40     *"uuid:6859dede-8574-59ab-9332-123456789012::upnp:rootdevice"}
41     */
42    private List<String> mUniqueServiceNames;
43
44    /**
45     * Return UPnP version number.
46     *
47     * @return version number.
48     * @see WifiP2pUpnpServiceInfo#VERSION_1_0
49     */
50    public int getVersion() {
51        return mVersion;
52    }
53
54    /**
55     * Return Unique Service Name strings.
56     *
57     * @return Unique Service Name.<br>
58     * e.g ) <br>
59     * <ul>
60     * <li>"uuid:6859dede-8574-59ab-9332-123456789012"
61     * <li>"uuid:6859dede-8574-59ab-9332-123456789012::upnp:rootdevice"
62     * <li>"uuid:6859dede-8574-59ab-9332-123456789012::urn:schemas-upnp-org:device:
63     * MediaServer:2"
64     * <li>"uuid:6859dede-8574-59ab-9332-123456789012::urn:schemas-upnp-org:service:
65     * ContentDirectory:2"
66     * </ul>
67     */
68    public List<String> getUniqueServiceNames() {
69        return mUniqueServiceNames;
70    }
71
72    /**
73     * hidden constructor.
74     *
75     * @param status status code
76     * @param transId transaction id
77     * @param dev source device
78     * @param data UPnP response data.
79     */
80    protected WifiP2pUpnpServiceResponse(int status,
81            int transId, WifiP2pDevice dev, byte[] data) {
82        super(WifiP2pServiceInfo.SERVICE_TYPE_UPNP,
83                status, transId, dev, data);
84        if (!parse()) {
85            throw new IllegalArgumentException("Malformed upnp service response");
86        }
87    }
88
89    /**
90     * Parse UPnP service discovery response
91     *
92     * @return {@code true} if the operation succeeded
93     */
94    private boolean parse() {
95        /*
96         * The data format is as follows.
97         *
98         * ______________________________________________________
99         * |  Version (1)  |          USN (Variable)            |
100         */
101        if (mData == null) {
102            // the empty is OK.
103            return true;
104        }
105
106        if (mData.length < 1) {
107            return false;
108        }
109
110        mVersion = mData[0] & 0xff;
111        String[] names = new String(mData, 1, mData.length-1).split(",");
112        mUniqueServiceNames = new ArrayList<String>();
113        for (String name : names) {
114            mUniqueServiceNames.add(name);
115        }
116        return true;
117    }
118
119    @Override
120    public String toString() {
121        StringBuffer sbuf = new StringBuffer();
122        sbuf.append("serviceType:UPnP(").append(mServiceType).append(")");
123        sbuf.append(" status:").append(Status.toString(mStatus));
124        sbuf.append(" srcAddr:").append(mDevice.deviceAddress);
125        sbuf.append(" version:").append(String.format("%02x", mVersion));
126        if (mUniqueServiceNames != null) {
127            for (String name : mUniqueServiceNames) {
128                sbuf.append(" usn:").append(name);
129            }
130        }
131        return sbuf.toString();
132    }
133
134    /**
135     * Create upnp service response.
136     *
137     * <pre>This is only used in{@link WifiP2pServiceResponse}
138     *
139     * @param status status code.
140     * @param transId transaction id.
141     * @param device source device.
142     * @param data UPnP response data.
143     * @return UPnP service response data.
144     * @hide
145     */
146    static WifiP2pUpnpServiceResponse newInstance(int status,
147            int transId, WifiP2pDevice device, byte[] data) {
148        if (status != WifiP2pServiceResponse.Status.SUCCESS) {
149            return new WifiP2pUpnpServiceResponse(status, transId, device, null);
150        }
151
152        try {
153            return new WifiP2pUpnpServiceResponse(status, transId, device, data);
154        } catch (IllegalArgumentException e) {
155            e.printStackTrace();
156        }
157        return null;
158    }
159}
160