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 
17 package android.net.wifi.p2p.nsd;
18 
19 import java.util.ArrayList;
20 import java.util.List;
21 import java.util.Locale;
22 import java.util.UUID;
23 
24 /**
25  * A class for storing Upnp service information that is advertised
26  * over a Wi-Fi peer-to-peer setup.
27  *
28  * {@see android.net.wifi.p2p.WifiP2pManager#addLocalService}
29  * {@see android.net.wifi.p2p.WifiP2pManager#removeLocalService}
30  * {@see WifiP2pServiceInfo}
31  * {@see WifiP2pDnsSdServiceInfo}
32  */
33 public class WifiP2pUpnpServiceInfo extends WifiP2pServiceInfo {
34 
35     /**
36      * UPnP version 1.0.
37      *
38      * <pre>Query Version should always be set to 0x10 if the query values are
39      * compatible with UPnP Device Architecture 1.0.
40      * @hide
41      */
42     public static final int VERSION_1_0 = 0x10;
43 
44     /**
45      * This constructor is only used in newInstance().
46      *
47      * @param queryList
48      */
WifiP2pUpnpServiceInfo(List<String> queryList)49     private WifiP2pUpnpServiceInfo(List<String> queryList) {
50         super(queryList);
51     }
52 
53     /**
54      * Create UPnP service information object.
55      *
56      * @param uuid a string representation of this UUID in the following format,
57      *  as per <a href="http://www.ietf.org/rfc/rfc4122.txt">RFC 4122</a>.<br>
58      *  e.g) 6859dede-8574-59ab-9332-123456789012
59      * @param device a string representation of this device in the following format,
60      * as per
61      * <a href="http://www.upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf">
62      *  UPnP Device Architecture1.1</a><br>
63      *  e.g) urn:schemas-upnp-org:device:MediaServer:1
64      * @param services a string representation of this service in the following format,
65      * as per
66      * <a href="http://www.upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf">
67      *  UPnP Device Architecture1.1</a><br>
68      *  e.g) urn:schemas-upnp-org:service:ContentDirectory:1
69      * @return UPnP service information object.
70      */
newInstance(String uuid, String device, List<String> services)71     public static WifiP2pUpnpServiceInfo newInstance(String uuid,
72             String device, List<String> services) {
73         if (uuid == null || device == null) {
74             throw new IllegalArgumentException("uuid or device cannnot be null");
75         }
76         UUID.fromString(uuid);
77 
78         ArrayList<String> info = new ArrayList<String>();
79 
80         info.add(createSupplicantQuery(uuid, null));
81         info.add(createSupplicantQuery(uuid, "upnp:rootdevice"));
82         info.add(createSupplicantQuery(uuid, device));
83         if (services != null) {
84             for (String service:services) {
85                 info.add(createSupplicantQuery(uuid, service));
86             }
87         }
88 
89         return new WifiP2pUpnpServiceInfo(info);
90     }
91 
92     /**
93      * Create wpa_supplicant service query for upnp.
94      *
95      * @param uuid
96      * @param data
97      * @return wpa_supplicant service query for upnp
98      */
createSupplicantQuery(String uuid, String data)99     private static String createSupplicantQuery(String uuid, String data) {
100         StringBuffer sb = new StringBuffer();
101         sb.append("upnp ");
102         sb.append(String.format(Locale.US, "%02x ", VERSION_1_0));
103         sb.append("uuid:");
104         sb.append(uuid);
105         if (data != null) {
106             sb.append("::");
107             sb.append(data);
108         }
109         return sb.toString();
110     }
111 }
112