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From: Charlie Perkins <charliep@watson.ibm.com>
Subject: Request for new DHCP option numbers
Date: Sat, 17 Aug 96 13:42:29 -0500
1. Directory Agent Extension
This extension specifies a Directory Agent (DA) [3], along with zero
or more Naming Authorities [2] known to that DA and zero or more
scopes supported by that DA.
The code for this extension is <tbd>. Each Naming Authority and each
scope MUST be a null-terminated string of ASCII characters. The
lengths of the strings are only indicated implicitly by their null
termination and the overall length of the extension.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Code | Length |D| NA count | scope count |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| (if present) |
| Directory Agent address (16 octets) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| NA list ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| scope list ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Code <tbd>
Length variable
D If the 'D' bit is set, the Directory Agent address is
present.
NA count
The number of Naming Authorities indicated by strings in
the NA list following.
scope count
The number of scopes indicated by strings in the scope
list following.
NA list
A list of strings denoting Naming Authorities.
scope list
A list of strings denoting scopes.
Note that more than one Directory Agent extension may be present in
a DHCP message. Each such extension may have the same or different
lists of Naming Authorities and scopes. The client may request a
Directory Agent with a particular scope, and/or knowledgeable about
schemes defined by a particular Naming Authority, by including the
Directory Agent extension in a DHCP Request message with no Directory
Agent address included (the 'D' bit set to zero), and the appropriate
strings in the NA list and/or scope list.
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