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comparison: mobile/android/thirdparty/ch/boye/httpclientandroidlib/conn/routing/RouteInfo.java

mobile/android/thirdparty/ch/boye/httpclientandroidlib/conn/routing/RouteInfo.java

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TOR_BUG_9701
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1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28 package ch.boye.httpclientandroidlib.conn.routing;
29
30 import java.net.InetAddress;
31
32 import ch.boye.httpclientandroidlib.HttpHost;
33
34 /**
35 * Read-only interface for route information.
36 *
37 * @since 4.0
38 */
39 public interface RouteInfo {
40
41 /**
42 * The tunnelling type of a route.
43 * Plain routes are established by connecting to the target or
44 * the first proxy.
45 * Tunnelled routes are established by connecting to the first proxy
46 * and tunnelling through all proxies to the target.
47 * Routes without a proxy cannot be tunnelled.
48 */
49 public enum TunnelType { PLAIN, TUNNELLED }
50
51 /**
52 * The layering type of a route.
53 * Plain routes are established by connecting or tunnelling.
54 * Layered routes are established by layering a protocol such as TLS/SSL
55 * over an existing connection.
56 * Protocols can only be layered over a tunnel to the target, or
57 * or over a direct connection without proxies.
58 * <br/>
59 * Layering a protocol
60 * over a direct connection makes little sense, since the connection
61 * could be established with the new protocol in the first place.
62 * But we don't want to exclude that use case.
63 */
64 public enum LayerType { PLAIN, LAYERED }
65
66 /**
67 * Obtains the target host.
68 *
69 * @return the target host
70 */
71 HttpHost getTargetHost();
72
73 /**
74 * Obtains the local address to connect from.
75 *
76 * @return the local address,
77 * or <code>null</code>
78 */
79 InetAddress getLocalAddress();
80
81 /**
82 * Obtains the number of hops in this route.
83 * A direct route has one hop. A route through a proxy has two hops.
84 * A route through a chain of <i>n</i> proxies has <i>n+1</i> hops.
85 *
86 * @return the number of hops in this route
87 */
88 int getHopCount();
89
90 /**
91 * Obtains the target of a hop in this route.
92 * The target of the last hop is the {@link #getTargetHost target host},
93 * the target of previous hops is the respective proxy in the chain.
94 * For a route through exactly one proxy, target of hop 0 is the proxy
95 * and target of hop 1 is the target host.
96 *
97 * @param hop index of the hop for which to get the target,
98 * 0 for first
99 *
100 * @return the target of the given hop
101 *
102 * @throws IllegalArgumentException
103 * if the argument is negative or not less than
104 * {@link #getHopCount getHopCount()}
105 */
106 HttpHost getHopTarget(int hop);
107
108 /**
109 * Obtains the first proxy host.
110 *
111 * @return the first proxy in the proxy chain, or
112 * <code>null</code> if this route is direct
113 */
114 HttpHost getProxyHost();
115
116 /**
117 * Obtains the tunnel type of this route.
118 * If there is a proxy chain, only end-to-end tunnels are considered.
119 *
120 * @return the tunnelling type
121 */
122 TunnelType getTunnelType();
123
124 /**
125 * Checks whether this route is tunnelled through a proxy.
126 * If there is a proxy chain, only end-to-end tunnels are considered.
127 *
128 * @return <code>true</code> if tunnelled end-to-end through at least
129 * one proxy,
130 * <code>false</code> otherwise
131 */
132 boolean isTunnelled();
133
134 /**
135 * Obtains the layering type of this route.
136 * In the presence of proxies, only layering over an end-to-end tunnel
137 * is considered.
138 *
139 * @return the layering type
140 */
141 LayerType getLayerType();
142
143 /**
144 * Checks whether this route includes a layered protocol.
145 * In the presence of proxies, only layering over an end-to-end tunnel
146 * is considered.
147 *
148 * @return <code>true</code> if layered,
149 * <code>false</code> otherwise
150 */
151 boolean isLayered();
152
153 /**
154 * Checks whether this route is secure.
155 *
156 * @return <code>true</code> if secure,
157 * <code>false</code> otherwise
158 */
159 boolean isSecure();
160
161 }

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