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
|
/*
* 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;
using System.Net;
using System.Net.Sockets;
namespace OpenSim.Framework
{
/// <summary>
/// A class for manipulating RegionHandle coordinates
/// </summary>
internal class RegionHandle
{
private UInt64 handle;
/// <summary>
/// Initialises a new grid-aware RegionHandle
/// </summary>
/// <param name="ip">IP Address of the Grid Server for this region</param>
/// <param name="x">Grid X Coordinate</param>
/// <param name="y">Grid Y Coordinate</param>
public RegionHandle(string ip, short x, short y)
{
IPAddress addr = IPAddress.Parse(ip);
if (addr.AddressFamily != AddressFamily.InterNetwork)
throw new Exception("Bad RegionHandle Parameter - must be an IPv4 address");
uint baseHandle = BitConverter.ToUInt32(addr.GetAddressBytes(), 0);
// Split the IP address in half
short a = (short) ((baseHandle << 16) & 0xFFFF);
short b = (short) ((baseHandle << 0) & 0xFFFF);
// Raise the bounds a little
uint nx = (uint) x;
uint ny = (uint) y;
// Multiply grid coords to get region coords
nx *= Constants.RegionSize;
ny *= Constants.RegionSize;
// Stuff the IP address in too
nx = (uint) a << 16;
ny = (uint) b << 16;
handle = ((UInt64) nx << 32) | (uint) ny;
}
/// <summary>
/// Initialises a new RegionHandle that is not inter-grid aware
/// </summary>
/// <param name="x">Grid X Coordinate</param>
/// <param name="y">Grid Y Coordinate</param>
public RegionHandle(uint x, uint y)
{
handle = ((x * Constants.RegionSize) << 32) | (y * Constants.RegionSize);
}
/// <summary>
/// Initialises a new RegionHandle from an existing value
/// </summary>
/// <param name="Region">A U64 RegionHandle</param>
public RegionHandle(UInt64 Region)
{
handle = Region;
}
/// <summary>
/// Returns the Grid Masked RegionHandle - For use in Teleport packets and other packets where sending the grid IP address may be handy.
/// </summary>
/// <remarks>Do not use for SimulatorEnable packets. The client will choke.</remarks>
/// <returns>Region Handle including IP Address encoding</returns>
public UInt64 getTeleportHandle()
{
return handle;
}
/// <summary>
/// Returns a RegionHandle which may be used for SimulatorEnable packets. Removes the IP address encoding and returns the lower bounds.
/// </summary>
/// <returns>A U64 RegionHandle for use in SimulatorEnable packets.</returns>
public UInt64 getNeighbourHandle()
{
UInt64 mask = 0x0000FFFF0000FFFF;
return handle | mask;
}
/// <summary>
/// Returns the IP Address of the GridServer from a Grid-Encoded RegionHandle
/// </summary>
/// <returns>Grid Server IP Address</returns>
public IPAddress getGridIP()
{
uint a = (uint) ((handle >> 16) & 0xFFFF);
uint b = (uint) ((handle >> 48) & 0xFFFF);
return new IPAddress((long) (a << 16) | (long) b);
}
/// <summary>
/// Returns the X Coordinate from a Grid-Encoded RegionHandle
/// </summary>
/// <returns>X Coordinate</returns>
public uint getGridX()
{
uint x = (uint) ((handle >> 32) & 0xFFFF);
return x;
}
/// <summary>
/// Returns the Y Coordinate from a Grid-Encoded RegionHandle
/// </summary>
/// <returns>Y Coordinate</returns>
public uint getGridY()
{
uint y = (uint) ((handle >> 0) & 0xFFFF);
return y;
}
}
}
|
