Daab
26th June 2002 10:01 UTC

Couple of newbie questions
Hi all, I have a couple of questions:

1. When I use Exec and ExecWait - what is their default directory if I don't specify an absolute path (as far as I could see it isn't $OUTDIR)

2. Is there an existing way in NSIS 1.98 to detect the computer's IP address, or can anyone think of an easy way to parse "ipconfig"'s output into a variable?

Thanks!

Smile2Me
26th June 2002 17:27 UTC

1) the currentdir, so $EXEDIR. The current dir becomes $OUTDIR if SetOutPath has been called.

2) not available in NSIS 1.98. But you can log the output of ipconfig to file using "ipconfig > ip.txt" and then analyse the file. Remember that the structure of this file depends on the setup of the network/internet connection and on the language of the system. So it's difficult to get the ipaddress (for internetconnection, not network connection) from this.
I will write a NSISdll for it. Wait a sec...

-Hendri.

Smile2Me
26th June 2002 19:12 UTC

Here's a dll to retrieve the IP-addresses of a computer. I just copied code from some website (and modified it to suit our needs). This code also retrieves IP-addresses of a computer on a network. I wouldn't know how to distinguish these from internet IP-addresses. But it works already. See the attachment.

Good luck,
-Hendri.

[edit]
Searching also resulted in this thread:
http://forums.winamp.com/showthread....6&highlight=ip also states what I discussed above. Best solution there: use ipconfig or a dll :). Good luck with the dll.
-Hn3.
[/edit]

Daab
27th June 2002 09:01 UTC

This is great, thanks!

Smile2Me
27th June 2002 09:14 UTC

You're welcome :D.

Greetz,
-Hendri.

Smile2Me
27th June 2002 17:21 UTC

I rescripted the function a bit to allow for a better integration of the IP.dll in new scripts. Check the source.

[edit]
A tiny test on a stand-alone (not connected to this world) showed that the dll returned IP-address 127.0.0.1. Maybe this could be the hint from which we can conclude that there is no connection. Sincerely, I do not know that much about (assigning) IP-addresses. I know how to set up a small local network but beyond that, I cannot help. Good luck!
-Hn3.
[/edit]

Have fun, good luck,
-Hendri.

Joost Verburg
27th June 2002 22:58 UTC

Originally posted by Smile2Me
This code also retrieves IP-addresses of a computer on a network. I wouldn't know how to distinguish these from internet IP-addresses. But it works already. See the attachment.

Smile2Me
28th June 2002 08:07 UTC

Thanks a lot Joost,

see the function I scripted using your information. Now the script provides two functions:
GetNextIp
CheckIP

[Important edit]
I added the rangecheck 127.x.x.x. I found additional information on this (German) site about "LoopBack" addresses. Important: the range 169.254.x.x is not mentioned there as being a LAN range. Could you please verify that it indeed is, Joost? Thanks in advance.
Untill further information, I include it in the range check, since I think I remember seeing 169.254.x.x on a network a long time ago, but I'm not sure of that.
-Hn3.
[/edit]

See the example for more information.

Have fun, good luck,
-Hendri.

Joost Verburg
28th June 2002 20:38 UTC

Originally posted by Smile2Me
Thanks a lot Joost,

see the function I scripted using your information. Now the script provides two functions:
GetNextIp
CheckIP

[Important edit]
I added the rangecheck 127.x.x.x. I found additional information on this (German) site about "LoopBack" addresses. Important: the range 169.254.x.x is not mentioned there as being a LAN range. Could you please verify that it indeed is, Joost? Thanks in advance.
Untill further information, I include it in the range check, since I think I remember seeing 169.254.x.x on a network a long time ago, but I'm not sure of that.
-Hn3.
[/edit]

See the example for more information.

Have fun, good luck,
-Hendri.

Smile2Me
29th June 2002 08:54 UTC

Thanks again Joost.

This is the (I think) final version of the script. The function CheckIP checks for the following types of IP-addresses:
1 - LoopBack IP (localhost, indicates no connection to a LAN or to the internet). 2 - Automatic Private IP Address (no DHCP server on LAN).
3 - Network IP.
4 - Internet IP.

Have fun again with this, greetz,
-Hendri.

Yurik
19th July 2006 11:18 UTC

Additional check needed
Can you please add a check that parameter is not an IP address? Unfortunately, the current script issues that string 'NOT AN IP ADDRESS' is an internet-type IP.

Thanks.