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Re: how to enumerate TCP and UDP listeners

Subject: Re: how to enumerate TCP and UDP listeners
From: email@hidden
Date: Fri, 20 Oct 2006 13:06:33 -0600
Delivered-to: email@hidden
Delivered-to: email@hidden

On Oct 20, 2006, at 12:15 PM, email@hidden wrote:

How can I enumerate open TCP and UDP ports on my computer programmatically in OS X? Also, is there a way to enumerate open TCP connections?

There still seems to be a lot of argument about whether it's ok to call the command line directly, but try these commands:

lsof -i
sudo lsof -i
sudo lsof -i tcp
sudo lsof -i udp
sudo lsof -i tcp:80

In Debian, I double checked my ssl port with fuser, which is similar:

fuser -v 443/tcp

No idea how to do it programmatically except for calling one of these with system(). Can anyone else believe that these unix tools just don't take a version number request? I would love to be able to pass 1.0 to lsof and even if it's version 3.0 or whatever, it would return a 1.0 formatted response. This should have been a requirement to get a tool bundled into a distribution, oh, 30 years ago. Hope this helps,

------------------------------------------------------------------------
Zack Morris              Z Sculpt Entertainment               This Space
email@hidden      http://www.zsculpt.com                 For Rent
------------------------------------------------------------------------
If the doors of perception were cleansed, everything would appear to man
  as it is, infinite. -William Blake, The Marriage of Heaven and Hell


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