1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSim Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System.Net;
using System.Net.Sockets;
using OpenMetaverse;
using OpenMetaverse.Packets;
using OpenSim.Framework;
namespace OpenSim.Region.ClientStack.LindenUDP
{
/// <summary>
/// This class sets up new client stacks. It also handles the immediate distribution of incoming packets to
/// client stacks
/// </summary>
public class LLPacketServer
{
// private static readonly log4net.ILog m_log
// = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
protected readonly ILLClientStackNetworkHandler m_networkHandler;
protected IScene m_scene;
/// <summary>
/// Tweakable user settings
/// </summary>
private ClientStackUserSettings m_userSettings;
public LLPacketServer(ILLClientStackNetworkHandler networkHandler, ClientStackUserSettings userSettings)
{
m_userSettings = userSettings;
m_networkHandler = networkHandler;
m_networkHandler.RegisterPacketServer(this);
}
public IScene LocalScene
{
set { m_scene = value; }
}
/// <summary>
/// Process an incoming packet.
/// </summary>
/// <param name="circuitCode"></param>
/// <param name="packet"></param>
public virtual void InPacket(uint circuitCode, Packet packet)
{
m_scene.ClientManager.InPacket(circuitCode, packet);
}
/// <summary>
/// Create a new client circuit
/// </summary>
/// <param name="remoteEP"></param>
/// <param name="scene"></param>
/// <param name="assetCache"></param>
/// <param name="packServer"></param>
/// <param name="sessionInfo"></param>
/// <param name="agentId"></param>
/// <param name="sessionId"></param>
/// <param name="circuitCode"></param>
/// <param name="proxyEP"></param>
/// <returns></returns>
protected virtual IClientAPI CreateNewCircuit(
EndPoint remoteEP, IScene scene, IAssetCache assetCache,
LLPacketServer packServer, AuthenticateResponse sessionInfo,
UUID agentId, UUID sessionId, uint circuitCode, EndPoint proxyEP)
{
return
new LLClientView(
remoteEP, scene, assetCache, packServer, sessionInfo, agentId, sessionId, circuitCode, proxyEP,
m_userSettings);
}
/// <summary>
/// Check whether a given client is authorized to connect.
/// </summary>
/// <param name="useCircuit"></param>
/// <param name="circuitManager"></param>
/// <param name="sessionInfo"></param>
/// <returns></returns>
public virtual bool IsClientAuthorized(
UseCircuitCodePacket useCircuit, AgentCircuitManager circuitManager, out AuthenticateResponse sessionInfo)
{
UUID agentId = useCircuit.CircuitCode.ID;
UUID sessionId = useCircuit.CircuitCode.SessionID;
uint circuitCode = useCircuit.CircuitCode.Code;
sessionInfo = circuitManager.AuthenticateSession(sessionId, agentId, circuitCode);
if (!sessionInfo.Authorised)
return false;
return true;
}
/// <summary>
/// Add a new client circuit. We assume that is has already passed an authorization check
/// </summary>
/// <param name="epSender"></param>
/// <param name="useCircuit"></param>
/// <param name="assetCache"></param>
/// <param name="sessionInfo"></param>
/// <param name="proxyEP"></param>
/// <returns>
/// true if a new circuit was created, false if a circuit with the given circuit code already existed
/// </returns>
public virtual bool AddNewClient(
EndPoint epSender, UseCircuitCodePacket useCircuit, IAssetCache assetCache,
AuthenticateResponse sessionInfo, EndPoint proxyEP)
{
IClientAPI newuser;
uint circuitCode = useCircuit.CircuitCode.Code;
if (m_scene.ClientManager.TryGetClient(circuitCode, out newuser))
{
// The circuit is already known to the scene. This not actually a problem since this will currently
// occur if a client is crossing borders (hence upgrading its circuit). However, we shouldn't
// really by trying to add a new client if this is the case.
return false;
}
UUID agentId = useCircuit.CircuitCode.ID;
UUID sessionId = useCircuit.CircuitCode.SessionID;
newuser
= CreateNewCircuit(
epSender, m_scene, assetCache, this, sessionInfo, agentId, sessionId, circuitCode, proxyEP);
m_scene.ClientManager.Add(circuitCode, newuser);
newuser.OnViewerEffect += m_scene.ClientManager.ViewerEffectHandler;
newuser.OnLogout += LogoutHandler;
newuser.OnConnectionClosed += CloseClient;
newuser.Start();
return true;
}
public void LogoutHandler(IClientAPI client)
{
client.SendLogoutPacket();
CloseClient(client);
}
/// <summary>
/// Send a packet to the given circuit
/// </summary>
/// <param name="buffer"></param>
/// <param name="size"></param>
/// <param name="flags"></param>
/// <param name="circuitcode"></param>
public virtual void SendPacketTo(byte[] buffer, int size, SocketFlags flags, uint circuitcode)
{
m_networkHandler.SendPacketTo(buffer, size, flags, circuitcode);
}
/// <summary>
/// Close a client circuit only
/// </summary>
/// <param name="circuitcode"></param>
public virtual void CloseCircuit(uint circuitcode)
{
m_networkHandler.RemoveClientCircuit(circuitcode);
}
/// <summary>
/// Completely close down the given client.
/// </summary>
/// <param name="client"></param>
public virtual void CloseClient(IClientAPI client)
{
//m_log.Info("PacketServer:CloseClient()");
CloseCircuit(client.CircuitCode);
m_scene.ClientManager.Remove(client.CircuitCode);
client.Close(false);
}
}
}
|
