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check if a parcelID is a encoded position data or a true UUID. This may fail, just reducing the odds.

melanie
UbitUmarov 2016-12-23 14:23:07 +00:00
parent 0887be3c12
commit b6266c6a1d
1 changed files with 5 additions and 1 deletions
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6
OpenSim/Framework/Util.cs
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@ -1725,12 +1725,16 @@ namespace OpenSim.Framework
return new UUID(bytes, 0); return new UUID(bytes, 0);
} }
public static void ParseFakeParcelID(UUID parcelID, out ulong regionHandle, out uint x, out uint y) public static bool ParseFakeParcelID(UUID parcelID, out ulong regionHandle, out uint x, out uint y)
{ {
byte[] bytes = parcelID.GetBytes(); byte[] bytes = parcelID.GetBytes();
regionHandle = Utils.BytesToUInt64(bytes); regionHandle = Utils.BytesToUInt64(bytes);
x = Utils.BytesToUInt(bytes, 8) & 0xffff; x = Utils.BytesToUInt(bytes, 8) & 0xffff;
y = Utils.BytesToUInt(bytes, 12) & 0xffff; y = Utils.BytesToUInt(bytes, 12) & 0xffff;
// validation may fail, just reducing the odds of using a real UUID as encoded parcel
return ( bytes[0] == 0 && bytes[4] == 0 && // handler x,y multiples of 256
bytes[9] < 64 && bytes[13] < 64 && // positions < 16km
bytes[14] == 0 && bytes[15] == 0);
} }
public static void ParseFakeParcelID(UUID parcelID, out ulong regionHandle, out uint x, out uint y, out uint z) public static void ParseFakeParcelID(UUID parcelID, out ulong regionHandle, out uint x, out uint y, out uint z)