Re: netstat & port scanning
Re: netstat & port scanning
- Subject: Re: netstat & port scanning
- From: Apple Developer <email@hidden>
- Date: Tue, 27 Sep 2005 01:06:34 -0700
Josh Graessley wrote:
netstat doesn't do a portscan. A portscan attempts to connect to
various ports to determine what's open. netstat uses sysctls to get
information from the kernel about which ports are open. I believe the
network utility performs a classic port scan, iterating through the
ports attempting to connect to each one.
it is my understanding that netstat tells you the state of an
address.port (I needed to do other sysctls calls as well) I was only
interested in the code that checks if the port is open/closed, and was
looking for code to does this.
The ip6stat structure is a private structure. This structure is
likely to change from release to release. Since netstat is recompiled
by Apple with every release where the structure changes, this isn't a
problem. If a third party used that data structure, they would find
that their program broke every time we changed the data structure.
I downloaded netstat from darwin sources and was unable to compile due
to files not present in 10.4.x
#include <netinet6/ip6_var.h>
for example is not found with spotlight. Was not sure if there was
anything else I needed to download to get it to compile.
I was able to get nc to compile from the cmd line and get the code that
I needed from that.
-josh
On Sep 26, 2005, at 2:48 AM, Apple Developer wrote:
Hi,
I need to get the status of a port (open or closed). I have
attempted to get netstat from the darwin sources to compile, but
found problems in that 'ip6stat' structure was not found (a .h file
is not found in 10.4). Does anyone else know of any source that can
do a port scan like the network utility does?
Thank you,
Randy
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