Re: [nmap-svn] r11551 - ncat (SO_DEBUG)

[Kris Katterjohn <katterjohn () gmail com>]

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On 01/02/2009 01:40 PM, David Fifield wrote:
> I was having bizarre problems that I tracked down to this change.
> Reverse DNS resolution and NSE gave me a bunch of Nsock errors. Here's
> from a -sL scan of scanme.nmap.org:
>
> Starting Nmap 4.76 ( http://nmap.org ) at 2009-01-02 12:36 MST
> NSOCK (0.3140s) msevent_new (IOD #0) (EID #8)
> NSOCK (0.3140s) UDP connection requested to 192.168.0.1:53 (IOD #1) EID 8
> NSOCK (0.3140s) msevent_new (IOD #0) (EID #18)
> NSOCK (0.3140s) Read request from IOD #0 [192.168.0.1:53] (timeout: -1ms) EID 18
> NSOCK (0.3140s) msevent_new (IOD #0) (EID #27)
> NSOCK (0.3140s) Write request for 43 bytes to IOD #0 EID 27 [192.168.0.1:53]: 
> .............52.134.13.64.in-addr.arpa.....
> NSOCK (0.3150s) nsock_loop() started (timeout=500ms). 3 events pending
> NSOCK (0.3150s) wait_for_events
> NSOCK (0.3150s) Callback: CONNECT SUCCESS for EID 8 [192.168.0.1:53]
> NSOCK (0.3150s) msevent_delete (IOD #0) (EID #8)
> NSOCK (0.3150s) Callback: WRITE ERROR [Input/output error (5)] for EID 27 [192.168.0.1:53]
> NSOCK (0.3150s) msevent_delete (IOD #0) (EID #27)
>
> The problem went away after I ran "make clean". Try that if the same
> thing is happening to you. I don't know what caused in in the first
> place, maybe the change in the size of the msiod struct wasn't noticed
> by files that depended on it.

I must've drawn up this patch on a clean tree because I wasn't running into
these problems, but thanks for tracking it down for any else having these issues.

> David Fifield

Thanks again,
Kris Katterjohn

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