PROBLEM: udp not delivered on special socket receive buffer size

[Matthias Welk <welk@xxxxxxxxxxxx>]

Hi,

I reported the following problem allready to the linux-kernel mailinglist, but 
did not receive any answer. I hope you are the right contacts for this.

The probles is, that I did not receive any udp packets (224 bytes), if the 
receive buffer size (SO_RCVBUF) of the socket is set to a value below 831 
(??) bytes.
Yes, you may ask why such a low value, but I have no influence on this, 
because it is set in the Java Media Framework internally.
You can check this behaviour with a small c-program too.

So my question is:

Is this a bug or are there any reasons for this magic 831 bytes barrier ?

Thanks, Matthias.
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