DhcpInfoInternal.java revision aea743aaa43a833fd8ff3dc56205197583152d5f 
1/*
2 * Copyright (C) 2010 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;
18
19import android.text.TextUtils;
20import android.util.Log;
21
22import java.net.InetAddress;
23import java.net.Inet4Address;
24import java.net.UnknownHostException;
25import java.util.ArrayList;
26import java.util.Collection;
27
28/**
29 * A simple object for retrieving the results of a DHCP request.
30 * Replaces (internally) the IPv4-only DhcpInfo class.
31 * @hide
32 */
33public class DhcpInfoInternal {
34    private final static String TAG = "DhcpInfoInternal";
35    public String ipAddress;
36    public int prefixLength;
37
38    public String dns1;
39    public String dns2;
40
41    public String serverAddress;
42    public int leaseDuration;
43
44    private Collection<RouteInfo> routes;
45
46    public DhcpInfoInternal() {
47        routes = new ArrayList<RouteInfo>();
48    }
49
50    public void addRoute(RouteInfo routeInfo) {
51        routes.add(routeInfo);
52    }
53
54    private int convertToInt(String addr) {
55        if (addr != null) {
56            try {
57                InetAddress inetAddress = NetworkUtils.numericToInetAddress(addr);
58                if (inetAddress instanceof Inet4Address) {
59                    return NetworkUtils.inetAddressToInt(inetAddress);
60                }
61            } catch (IllegalArgumentException e) {}
62        }
63        return 0;
64    }
65
66    public DhcpInfo makeDhcpInfo() {
67        DhcpInfo info = new DhcpInfo();
68        info.ipAddress = convertToInt(ipAddress);
69        for (RouteInfo route : routes) {
70            if (route.isDefaultRoute()) {
71                info.gateway = convertToInt(route.getGateway().getHostAddress());
72                break;
73            }
74        }
75        try {
76            InetAddress inetAddress = NetworkUtils.numericToInetAddress(ipAddress);
77            info.netmask = NetworkUtils.prefixLengthToNetmaskInt(prefixLength);
78        } catch (IllegalArgumentException e) {}
79        info.dns1 = convertToInt(dns1);
80        info.dns2 = convertToInt(dns2);
81        info.serverAddress = convertToInt(serverAddress);
82        info.leaseDuration = leaseDuration;
83        return info;
84    }
85
86    public LinkAddress makeLinkAddress() {
87        if (TextUtils.isEmpty(ipAddress)) {
88            Log.e(TAG, "makeLinkAddress with empty ipAddress");
89            return null;
90        }
91        return new LinkAddress(NetworkUtils.numericToInetAddress(ipAddress), prefixLength);
92    }
93
94    public LinkProperties makeLinkProperties() {
95        LinkProperties p = new LinkProperties();
96        p.addLinkAddress(makeLinkAddress());
97        for (RouteInfo route : routes) {
98            p.addRoute(route);
99        }
100        if (TextUtils.isEmpty(dns1) == false) {
101            p.addDns(NetworkUtils.numericToInetAddress(dns1));
102        } else {
103            p.addDns(NetworkUtils.numericToInetAddress(serverAddress));
104            Log.d(TAG, "empty dns1, use dhcp server as dns1!");
105        }
106        if (TextUtils.isEmpty(dns2) == false) {
107            p.addDns(NetworkUtils.numericToInetAddress(dns2));
108        } else {
109            Log.d(TAG, "makeLinkProperties with empty dns2!");
110        }
111        return p;
112    }
113
114    public String toString() {
115        String routeString = "";
116        for (RouteInfo route : routes) routeString += route.toString() + " | ";
117        return "addr: " + ipAddress + "/" + prefixLength +
118                " routes: " + routeString +
119                " dns: " + dns1 + "," + dns2 +
120                " dhcpServer: " + serverAddress +
121                " leaseDuration: " + leaseDuration;
122    }
123}
124