passing values to client: how big?
dhcp1 at thehobsons.co.uk
Tue Jan 13 12:42:06 UTC 2009
Carl Karsten wrote:
>Someone just suggested passing a public key.
>Is there a limit on how big the parameters, and the over all dhcp response is?
Yes, there is.
The UDP packet is limited to 576 bytes, unless the client indicates
that it can accept larger. 312 bytes are allowed for the variable
option part - but don't forget that each option value is preceded by
a byte for option code and a byte for option length - eg a 4 byte
option would take 6 bytes the packet.
There is also a facility to redefine the server and file fields as
option space, this gives an extra 192 bytes for options.
Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
More information about the dhcp-users