packet buffer length

[jots]

how can I get Packet to write into a buffer of the exact length that is needed?
for instance, now I do:

  buf = new Buffer(1024) # too big 
  Packet.write(buf, pre)
  server.send(buf, 0, buf.length, 53, ns)
  buf = null

but I think that ends up sending too large packets in most cases.
Is there a way to get the "buf" to the correct length before sending?

[stephenwvickers]

Packet.write() returns a length which you can use:

var len = Packet.write(buf, pre)

Then use len in send():

server.send(buf, 0, len , 53, ns)