Actually I want to dinamically assign bootfile-name based on clients MAC.
I have tried this config:
option bootfile-name concat( binary-to-ascii(16, 8, "", substring (hardware, 1, 6)), ".cfg");
But this is wrong config (as dhcp server isn't starting at all). If instead of concat(...) I put just real filename (e.g. "000102030405.cfg") everything is ok. But this is not what I need. Is there any way to dynamically set bootfile-name?
Well, good news. I found an answer by myself. The answer itself was in man pages. All you need is to use EXPRESSIONS. This is correct for any option (not only bootfile-name), to which you want assign a value from client's request.
From the man dhcp-options:
SETTING OPTION VALUES USING EXPRESSIONS
Sometimes it's helpful to be able to set the value of a DHCP option based on
some value that the client has sent. To do this, you can use expression
evaluation. The dhcp-eval(5) manual page describes how to write expressions.
To assign the result of an evaluation to an option,
define the option as follows:
option my-option = expression ;
For example:
option hostname = binary-to-ascii (16, 8, "-", substring (hardware, 1, 6));
So, as you can see, the only difference between this code and mine is equal sign!
For curious one, the answer to my question is:
option bootfile-name = concat( binary-to-ascii(16, 8, "",
substring (hardware, 1, 6)), ".cfg");
Did you noticed "="?
