Re: Debuging vbr?

From: Fredrik Pettai <>
Date: Sat, 23 Oct 2010 10:54:40 +0200

On Oct 23, 2010, at 6:21 AM, Murray S. Kucherawy wrote:
> First of all, it looks like the construction of the Authentication-Results header field is buggy. I'll fix that up for 2.2.1.

Yes, I thought so too, but the more important issue was why it was failing.

>> That's the maximum of output I get by using ./opendkim (opts) -vvv -W
>> Is there a way to make (especially the vbr part) more verbose so I can
>> pinpoint why vbr fails?
> Not without changes to the API and such.


> If you're any good with debuggers, I would suggest putting a breakpoint at vbr_query() and walking through it to see what queries it's sending, what it's getting back, and how that all lines up.

No I'm not that good, but I would be happy to help out and learn. I thought of switching the local resolver to bind and do query logging, to see what query it sends, but to debug the code is obviously better... Can you send me a diff with some debug code + what gdb command I should run? and/or any helpful reference to read?

> If you can send me a sample of a real message that's failing this way, I can try to debug it. But don't redact any of the data; I need to replicate the same queries your system is doing.

Sure. I'll try to do so later today.

> 2.2.1 is due out on Monday, so if you can get this to me over the weekend and it turns out to be something easily fixed or explained, we can possibly get it in. (Sorry for the late response...)


> -MSK

Received on Sat Oct 23 2010 - 08:54:59 PST

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