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Packet headers are not zero-encoded so don't try to zero-decode these in PacketPool.GetType()

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Instead adjusts code with that from Packet.BuildHeader(byte[], ref int, ref int):Header in libomv
This stops packet decoding failures with agent UUIDs that contain 00 in their earlier parts (e.g. b0b0b0b0-0000-0000-0000-000000000211)
Thanks to lkalif for pointing this out.
This commit is contained in:
Justin Clark-Casey (justincc)
2013-08-16 00:58:25 +01:00
parent 7c916ab91c
commit 7d268912f1
1 changed files with 9 additions and 16 deletions
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25
OpenSim/Region/ClientStack/Linden/UDP/PacketPool.cs
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@@ -145,39 +145,32 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return packet;
}
// private byte[] decoded_header = new byte[10];
private static PacketType GetType(byte[] bytes)
{
byte[] decoded_header = new byte[10 + 8];
ushort id;
PacketFrequency freq;
bool isZeroCoded = (bytes[0] & Helpers.MSG_ZEROCODED) != 0;
if ((bytes[0] & Helpers.MSG_ZEROCODED) != 0)
if (bytes[6] == 0xFF)
{
Helpers.ZeroDecode(bytes, 16, decoded_header);
}
else
{
Buffer.BlockCopy(bytes, 0, decoded_header, 0, 10);
}
if (decoded_header[6] == 0xFF)
{
if (decoded_header[7] == 0xFF)
if (bytes[7] == 0xFF)
{
id = (ushort) ((decoded_header[8] << 8) + decoded_header[9]);
freq = PacketFrequency.Low;
if (isZeroCoded && bytes[8] == 0)
id = bytes[10];
else
id = (ushort)((bytes[8] << 8) + bytes[9]);
}
else
{
id = decoded_header[7];
freq = PacketFrequency.Medium;
id = bytes[7];
}
}
else
{
id = decoded_header[6];
freq = PacketFrequency.High;
id = bytes[6];
}
return Packet.GetType(id, freq);