1 /*
2  * Copyright (C) 2006 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 package com.android.internal.telephony.dataconnection;
17 
18 import android.annotation.NonNull;
19 import android.annotation.Nullable;
20 import android.net.NetworkRequest;
21 import android.net.NetworkSpecifier;
22 import android.net.TelephonyNetworkSpecifier;
23 import android.telephony.Annotation.ApnType;
24 
25 import com.android.telephony.Rlog;
26 
27 /**
28  * Wraps cellular network requests to configured apn types.
29  */
30 public class DcRequest implements Comparable<DcRequest> {
31     private static final String LOG_TAG = "DcRequest";
32 
33     @NonNull
34     public final NetworkRequest networkRequest;
35     public final int priority;
36     public final @ApnType int apnType;
37 
DcRequest(@onNull final NetworkRequest nr, @ApnType final int type, int apnPriority)38     private DcRequest(@NonNull final NetworkRequest nr, @ApnType final int type,
39             int apnPriority) {
40         networkRequest = nr;
41         priority = apnPriority;
42         apnType = type;
43     }
44 
45     /**
46      * Create a DcRequest based off of the network request.  If the network request is not cellular,
47      * then null is returned and a warning is generated.
48      * @param networkRequest sets the type of dc request
49      * @param apnConfigTypeRepository apn config types to match on the network request
50      * @return corresponding DcRequest
51      *
52      */
53     @Nullable
create(@onNull final NetworkRequest networkRequest, @NonNull final ApnConfigTypeRepository apnConfigTypeRepository)54     public static DcRequest create(@NonNull final NetworkRequest networkRequest,
55             @NonNull final ApnConfigTypeRepository apnConfigTypeRepository) {
56         final int apnType = ApnContext.getApnTypeFromNetworkRequest(networkRequest);
57         final ApnConfigType apnConfigType = apnConfigTypeRepository.getByType(apnType);
58         if (apnConfigType == null) {
59             Rlog.d(LOG_TAG, "Non cellular request ignored: " + networkRequest.toString());
60             checkForAnomalousNetworkRequest(networkRequest);
61             return null;
62         } else {
63             Rlog.d(LOG_TAG, "Cellular request confirmed: " + networkRequest.toString());
64             return new DcRequest(networkRequest, apnType, apnConfigType.getPriority());
65         }
66     }
67 
checkForAnomalousNetworkRequest(NetworkRequest networkRequest)68     private static void checkForAnomalousNetworkRequest(NetworkRequest networkRequest) {
69         NetworkSpecifier specifier = networkRequest.getNetworkSpecifier();
70         if (specifier != null) {
71             if (specifier instanceof TelephonyNetworkSpecifier) {
72                 reportAnomalousNetworkRequest(networkRequest);
73             }
74         }
75     }
76 
reportAnomalousNetworkRequest(NetworkRequest networkRequest)77     private static void reportAnomalousNetworkRequest(NetworkRequest networkRequest) {
78         //TODO: Report anomaly if this happens
79         Rlog.w(LOG_TAG, "A TelephonyNetworkSpecifier for a non-cellular request is invalid: "
80                 + networkRequest.toString());
81 
82     }
83 
toString()84     public String toString() {
85         return networkRequest.toString() + ", priority=" + priority + ", apnType=" + apnType;
86     }
87 
hashCode()88     public int hashCode() {
89         return networkRequest.hashCode();
90     }
91 
equals(Object o)92     public boolean equals(Object o) {
93         if (o instanceof DcRequest) {
94             return networkRequest.equals(((DcRequest)o).networkRequest);
95         }
96         return false;
97     }
98 
compareTo(DcRequest o)99     public int compareTo(DcRequest o) {
100         return o.priority - priority;
101     }
102 }
103