dhcp vendor encapsulated options in perl

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi, I have need to give a windows dhcp server a vendor specific option. In ISC DHCP, I do this: option pxelinux.pathprefix "http://raidtest.hos.anvin.org/tftpboot/"; For Windows, I need something that looks like this:

option vendor-encapsulated-options
 d0:04:f1:00:74:73:
 d2:23:68:74:74:70:3a:2f:2f:72:61:69:64:74:65:73:74:2e:
  61:6e:76:69:6e:2e:6f:72:67:2f:74:66:74:70:62:6f:
  6f:74:2f:
 d3:04:00:00:00:1e;
[download]

(example taken from http://syslinux.zytor.com/wiki/index.php/PXELINUX#using_vendor_options) How can I convert from the ISC format to this hexishness?

Comment on dhcp vendor encapsulated options in perl Select or Download Code

Replies are listed 'Best First'.
Re: dhcp vendor encapsulated options in perl by shmem (Chancellor) on Nov 17, 2008 at 11:58 UTC
`d0`, `d2` and `d3` are the option numbers 208, 210 and 211 (in hex). Next byte in hex is the length of the option string. To convert "http://raidtest.anvin.org/tftpboot/" into that hex representation, you could e.g. `print join ":", map { sprintf "%x", ord $_ } split //, "http://raidtes +t.anvin.org/tftpboot/";` [download] See ord, hex, split, join, sprintf and map. Counting bytes with len and putting together the whole thing is left as an exercise to the reader. See also Net::DHCP::Options.	[reply] [d/l] [select]
Re^2: dhcp vendor encapsulated options in perl by Anonymous Monk on Nov 17, 2008 at 12:39 UTC
Excellent, got it working now. Thanks :)	[reply]
Re: dhcp vendor encapsulated options in perl by bingos (Vicar) on Nov 17, 2008 at 11:14 UTC
Nope, no matter how many times I look at this, I fail to see the relevance to perl	[reply]