macOS How to change IP address via cocoa program/ other program

[KenLin]

Dear All,
I want to change IP address via cocoa's API or other function.
Is anyone knows how to change IP in program?

Thanks!
Ken Lin in trouble

 

[janey]

and why would you need to change an IP address?

 

[KenLin]

Dear janey:
I want to write a program to change IP easier via cocoa.

Thanks,
Ken

 

[janey]

Dear Ken,

My question is asking you why one would want to change an IP address in such a manner when there are so many things that factor into this that the end user does not have control over?

Thanks,
Jane

 

[KenLin]

Dear Ken,

My question is asking you why one would want to change an IP address in such a manner when there are so many things that factor into this that the end user does not have control over?

Thanks,
Jane
_______
Dear Jane:
Because i want to write a wireless dongle program, and i need to change / specify dongle's host IP address.

Thanks
Ken

 

[blaster_boy]

You could always do a shell out from your program to launch ifconfig with the required settings to change the ip address.

 

[lancestraz]

You can do this in Terminal.

sudo ifconfig en1 inet 192.168.0.1

And I imagine you can run a shell script via cocoa.

 

[KenLin]

Thanks: Jane, blaster_boy & lancestraz:

Yes, shell script can work.
Do u have any other method to change IP address? like API or other functions?

Ken

 

[Eraserhead]

And I imagine you can run a shell script via cocoa.

Btw how do you do that?

 

[robbieduncan]

Btw how do you do that?

NSTask

 

[Eraserhead]

NSTask

Thanks , not knowing this has led me to go via Applescript to do it , though it is a one-off usage so it's not a big deal.