On debug output

I am currently making over the debug module and have found a few odd
corners where some more clarification could be helpful.

Currently debug_is_token_registered only checks if there exist an
enabled debug region that is a prefix of token.
I would like to modify the check to be if the longest module is enabled
or not.

Currently debug_print_everything can force us to print everything and
dodebug can force us to print nothing but there is no support for
setting the default policy.
I think it would be nice to be able to say that the default policy
should be to print everything or to not prit anything.

Currently dbg_tokens might contain multiple entries with the same token.
I think it would be reasonable to have a uniqueness condition on
dbg_tokens.

Currently the MIB maps to the code as follows:
nsDebugEnabled <=> !dodebug
nsDebugOutputAll <=> debug_print_everything
nsDebugDumpPdu <=> NETSNMP_DS_LIB_DUMP_PACKET

nsDebugTokenPrefix <=> debug_entry->token_name
nsDebugTokenStatus <=> debug_entry->status & SNMP_DEBUG_ACTIVE

I would like to add some more things to the mib:

nsDebugDefaultEnabled OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION "If debug output should be generated for items
without any specific instructions."
DEFVAL { true }
::= { nsConfigDebug 5 }

The mapping to code would be
nsDebugDefaultEnabled <=> <new variable with default action>

nsDebugTokenEnabled OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION "If debug output should be generated for items
with this prefix unless a more specialized
match exists."
DEFVAL { true }
::= { nsDebugTokenStatus 5 }

The mapping to code would be
nsDebugTokenEnabled <=> !(debug_entry->status & SNMP_DEBUG_EXCLUDED)

I am aware that there are some older deprecated but similar columns in
nsDebugTokenTable and since I haven't checked if my names clash I might
have to change some names in this proposal.

The effect I am searching is that one should be able to say that the
debug output is for instance:

+foo -foobar

or

+ALL -trace

Further, I am looking to support dynamic adding and removal of debug
tokens and finally all this should be accessible using the mib module. I
also intend to add undo support to the mib module.

Any comments on this?

/MF


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