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-rw-r--r--OpenSim/OpenSim.RegionServer/ClientViewBase.cs299
1 files changed, 299 insertions, 0 deletions
diff --git a/OpenSim/OpenSim.RegionServer/ClientViewBase.cs b/OpenSim/OpenSim.RegionServer/ClientViewBase.cs
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+++ b/OpenSim/OpenSim.RegionServer/ClientViewBase.cs
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1using System;
2using System.Collections;
3using System.Collections.Generic;
4using libsecondlife;
5using libsecondlife.Packets;
6using System.Net;
7using System.Net.Sockets;
8using System.IO;
9using System.Threading;
10using System.Timers;
11using OpenSim.Framework.Utilities;
12using OpenSim.Framework.Interfaces;
13
14namespace OpenSim
15{
16 public class ClientViewBase
17 {
18 protected BlockingQueue<QueItem> PacketQueue;
19 protected Dictionary<uint, uint> PendingAcks = new Dictionary<uint, uint>();
20 protected Dictionary<uint, Packet> NeedAck = new Dictionary<uint, Packet>();
21
22 protected System.Timers.Timer AckTimer;
23 protected uint Sequence = 0;
24 protected object SequenceLock = new object();
25 protected const int MAX_APPENDED_ACKS = 10;
26 protected const int RESEND_TIMEOUT = 4000;
27 protected const int MAX_SEQUENCE = 0xFFFFFF;
28
29 public uint CircuitCode;
30 public EndPoint userEP;
31
32 protected OpenSimNetworkHandler m_networkServer;
33
34 public ClientViewBase()
35 {
36
37 }
38
39 protected virtual void ProcessInPacket(Packet Pack)
40 {
41
42 }
43
44 protected virtual void ProcessOutPacket(Packet Pack)
45 {
46 // Keep track of when this packet was sent out
47 Pack.TickCount = Environment.TickCount;
48
49 if (!Pack.Header.Resent)
50 {
51 // Set the sequence number
52 lock (SequenceLock)
53 {
54 if (Sequence >= MAX_SEQUENCE)
55 Sequence = 1;
56 else
57 Sequence++;
58 Pack.Header.Sequence = Sequence;
59 }
60
61 if (Pack.Header.Reliable) //DIRTY HACK
62 {
63 lock (NeedAck)
64 {
65 if (!NeedAck.ContainsKey(Pack.Header.Sequence))
66 {
67 try
68 {
69 NeedAck.Add(Pack.Header.Sequence, Pack);
70 }
71 catch (Exception e) // HACKY
72 {
73 e.ToString();
74 // Ignore
75 // Seems to throw a exception here occasionally
76 // of 'duplicate key' despite being locked.
77 // !?!?!?
78 }
79 }
80 else
81 {
82 // Client.Log("Attempted to add a duplicate sequence number (" +
83 // packet.Header.Sequence + ") to the NeedAck dictionary for packet type " +
84 // packet.Type.ToString(), Helpers.LogLevel.Warning);
85 }
86 }
87
88 // Don't append ACKs to resent packets, in case that's what was causing the
89 // delivery to fail
90 if (!Pack.Header.Resent)
91 {
92 // Append any ACKs that need to be sent out to this packet
93 lock (PendingAcks)
94 {
95 if (PendingAcks.Count > 0 && PendingAcks.Count < MAX_APPENDED_ACKS &&
96 Pack.Type != PacketType.PacketAck &&
97 Pack.Type != PacketType.LogoutRequest)
98 {
99 Pack.Header.AckList = new uint[PendingAcks.Count];
100 int i = 0;
101
102 foreach (uint ack in PendingAcks.Values)
103 {
104 Pack.Header.AckList[i] = ack;
105 i++;
106 }
107
108 PendingAcks.Clear();
109 Pack.Header.AppendedAcks = true;
110 }
111 }
112 }
113 }
114 }
115
116 byte[] ZeroOutBuffer = new byte[4096];
117 byte[] sendbuffer;
118 sendbuffer = Pack.ToBytes();
119
120 try
121 {
122 if (Pack.Header.Zerocoded)
123 {
124 int packetsize = Helpers.ZeroEncode(sendbuffer, sendbuffer.Length, ZeroOutBuffer);
125 m_networkServer.SendPacketTo(ZeroOutBuffer, packetsize, SocketFlags.None, CircuitCode);//userEP);
126 }
127 else
128 {
129 m_networkServer.SendPacketTo(sendbuffer, sendbuffer.Length, SocketFlags.None, CircuitCode); //userEP);
130 }
131 }
132 catch (Exception)
133 {
134 OpenSim.Framework.Console.MainConsole.Instance.WriteLine(OpenSim.Framework.Console.LogPriority.MEDIUM, "OpenSimClient.cs:ProcessOutPacket() - WARNING: Socket exception occurred on connection " + userEP.ToString() + " - killing thread");
135 this.KillThread();
136 }
137
138 }
139
140 public virtual void InPacket(Packet NewPack)
141 {
142 // Handle appended ACKs
143 if (NewPack.Header.AppendedAcks)
144 {
145 lock (NeedAck)
146 {
147 foreach (uint ack in NewPack.Header.AckList)
148 {
149 NeedAck.Remove(ack);
150 }
151 }
152 }
153
154 // Handle PacketAck packets
155 if (NewPack.Type == PacketType.PacketAck)
156 {
157 PacketAckPacket ackPacket = (PacketAckPacket)NewPack;
158
159 lock (NeedAck)
160 {
161 foreach (PacketAckPacket.PacketsBlock block in ackPacket.Packets)
162 {
163 NeedAck.Remove(block.ID);
164 }
165 }
166 }
167 else if ((NewPack.Type == PacketType.StartPingCheck))
168 {
169 //reply to pingcheck
170 libsecondlife.Packets.StartPingCheckPacket startPing = (libsecondlife.Packets.StartPingCheckPacket)NewPack;
171 libsecondlife.Packets.CompletePingCheckPacket endPing = new CompletePingCheckPacket();
172 endPing.PingID.PingID = startPing.PingID.PingID;
173 OutPacket(endPing);
174 }
175 else
176 {
177 QueItem item = new QueItem();
178 item.Packet = NewPack;
179 item.Incoming = true;
180 this.PacketQueue.Enqueue(item);
181 }
182
183 }
184
185 public virtual void OutPacket(Packet NewPack)
186 {
187 QueItem item = new QueItem();
188 item.Packet = NewPack;
189 item.Incoming = false;
190 this.PacketQueue.Enqueue(item);
191 }
192
193 # region Low Level Packet Methods
194
195 protected void ack_pack(Packet Pack)
196 {
197 if (Pack.Header.Reliable)
198 {
199 libsecondlife.Packets.PacketAckPacket ack_it = new PacketAckPacket();
200 ack_it.Packets = new PacketAckPacket.PacketsBlock[1];
201 ack_it.Packets[0] = new PacketAckPacket.PacketsBlock();
202 ack_it.Packets[0].ID = Pack.Header.Sequence;
203 ack_it.Header.Reliable = false;
204
205 OutPacket(ack_it);
206
207 }
208 /*
209 if (Pack.Header.Reliable)
210 {
211 lock (PendingAcks)
212 {
213 uint sequence = (uint)Pack.Header.Sequence;
214 if (!PendingAcks.ContainsKey(sequence)) { PendingAcks[sequence] = sequence; }
215 }
216 }*/
217 }
218
219 protected void ResendUnacked()
220 {
221 int now = Environment.TickCount;
222
223 lock (NeedAck)
224 {
225 foreach (Packet packet in NeedAck.Values)
226 {
227 if ((now - packet.TickCount > RESEND_TIMEOUT) && (!packet.Header.Resent))
228 {
229 OpenSim.Framework.Console.MainConsole.Instance.WriteLine(OpenSim.Framework.Console.LogPriority.VERBOSE, "Resending " + packet.Type.ToString() + " packet, " +
230 (now - packet.TickCount) + "ms have passed");
231
232 packet.Header.Resent = true;
233 OutPacket(packet);
234 }
235 }
236 }
237 }
238
239 protected void SendAcks()
240 {
241 lock (PendingAcks)
242 {
243 if (PendingAcks.Count > 0)
244 {
245 if (PendingAcks.Count > 250)
246 {
247 // FIXME: Handle the odd case where we have too many pending ACKs queued up
248 OpenSim.Framework.Console.MainConsole.Instance.WriteLine(OpenSim.Framework.Console.LogPriority.VERBOSE, "Too many ACKs queued up!");
249 return;
250 }
251
252 //OpenSim.Framework.Console.MainConsole.Instance.WriteLine("Sending PacketAck");
253
254
255 int i = 0;
256 PacketAckPacket acks = new PacketAckPacket();
257 acks.Packets = new PacketAckPacket.PacketsBlock[PendingAcks.Count];
258
259 foreach (uint ack in PendingAcks.Values)
260 {
261 acks.Packets[i] = new PacketAckPacket.PacketsBlock();
262 acks.Packets[i].ID = ack;
263 i++;
264 }
265
266 acks.Header.Reliable = false;
267 OutPacket(acks);
268
269 PendingAcks.Clear();
270 }
271 }
272 }
273
274 protected void AckTimer_Elapsed(object sender, ElapsedEventArgs ea)
275 {
276 SendAcks();
277 ResendUnacked();
278 }
279 #endregion
280
281 protected virtual void KillThread()
282 {
283
284 }
285
286 #region Nested Classes
287
288 public class QueItem
289 {
290 public QueItem()
291 {
292 }
293
294 public Packet Packet;
295 public bool Incoming;
296 }
297 #endregion
298 }
299}
generated by cgit v1.1 at 2024-07-01 00:19:18 +0000