On 25 Sep 2005 at 14:34, OpenMacNews wrote about
"Re: [exim] dbm vs net-iplsearch for":
| hi fred,
|
| >| i suppose a two-pass lookup string approach, matching 1st for address, then
| >| range, is doable,
| >
| > I don't think so. How would you convert the connecting IP address to
| > a string that looks like a CIDR range with the correct number of
| > masked bits?
|
| well, now that you mention it, i happen to be struggling over that right now.
| i'm finding myself considering writing an external C funtion ...
I don't see how that would help. Again, the issue I see is that you
don't know what mask to apply to the source IP to yield the correct
CIDR notation that the potentially matching entry in the DB has.
It's a conceptual problem, not an implementation issue.
|...
| > No. From spec.txt:
| >
| > * iplsearch: The given file is a text file containing keys and data. A key
| > is ... (snip description)
| >
| > Warning 1: Unlike most other single-key lookup types, a file of data for
| > iplsearch can not be turned into a DBM or cdb file, because those lookup
| > types support only literal keys.
|...
| now, one more question just for clarity ... here, "literal keys" DOES mean
| exact matches, yes?
Right.
- Fred
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