Port scan

[bgosalci]

Hi all, as I am installing an app that needs connection through TCP port I need to check whether the TCP port is already used. Is there a way to check whether the port number is used or not. Lets say I want to test whether the port 8443 is used by any other application, how would I do that through NSIS installer during installation.

[RobGrant]

You'd probably need to launch a third-party tcp ping or tcptrace mate, using Exec, ExecWait, or nsExec::Exec (look those up in the docs for details). Far as I know there's no plugin written to do that stuff, feel free to write one yourself

[Takhir]

It's easy to get all used ports list, for example 'netstat -a' using nsExec or attached plug-in (re-worked not long ago ), but '|grep 8443' not works on most of Wins, so you will need to learn NSIS string and file functions to extract 8443 LISTENING string.

[bgosalci]

Ok how will I get the output of netstat -a command

I have tried the following:

ExecWait "netstat -a" $0

This did not work

[KenA]

Originally posted by bgosalci
Ok how will I get the output of netstat -a command

I have tried the following:

ExecWait "netstat -a" $0

This did not work

Hi,

I would recommand the nsExec plug-in like so:

nsExec::ExecToStack '"netstat" -a'
Pop $0

from the nsExec documentation: "...ExecToStack will push up to ${NSIS_MAX_STRLEN} characters of output onto the stack after the return value."

Hope this helps,

KenA

[bgosalci]

Thanks for reply but the value returned is = 0.

if used with timeout the returned value is = error.

[KenA]

Originally posted by bgosalci
Thanks for reply but the value returned is = 0.

if used with timeout the returned value is = error.

My bad, here's what should work.

nsExec::ExecToStack /TIMEOUT=5000 '"netstat.exe" -a'
Pop $0 ; retrieve the error code
StrCmp $0 "0" 0 not_ok
Pop $0 ; retrieve the output.
not_ok: ;error dealing code...
...

Should be better.

KenA

[Takhir]

config.h(11):#define NSIS_MAX_STRLEN 1024
but I see few screens of data on netstat, exec 2log looks better for me.

[bgosalci]

I have found a utility that runs in Windows command line, which will do the work. If any one else needs this sort of utility than check the links.

Download:

http://www.microsoft.com/downloads/details.aspx?familyid=89811747-c74b-4638-a2d5-ac828bdc6983&displaylang=en

Info:

http://support.microsoft.com/default.aspx?scid=kb;en-us;832919