PlainDatagramSocketImpl.c send is using the size of the
datagram buffer instead of the datagram buffer length to send
the datagram.

i.e. dp = new DatagramPacket(new byte[1024], 32) will be sent at 1024 bytes,
not 32.


Now:

    packetBufferLen = (*env)->GetArrayLength(env, packetBuffer);

Should be something like:

    packetBufferLen = (*env)->GetIntField(env, packet, dp_lengthID);

So my send of 56 bytes is turning into a send of 32k. :-)