How to use ioctl in my own userspace program

[Li Jian Song]

I want to do more L2 handoff experiment and have done it in the driver.
But for some reason, I must implement the algorithm in the user space.
So I want to know how to use the hostap ioctl.
	For example, I issue cmd "iwlist wlan0 scan" and I will get the
reault in the shell. But how to do it in my program?  
	Thanks before. 

____________________________________
Jason Lee  
CR, THOMSON Broadband R&D (Beijing) Co., Ltd.
Tel: (86 10) 8273 0866 Ext. 8134
Fax: (86 10) 8273 0806
E-mail: jian-song.li at thomson.net
____________________________________
-----Original Message-----
From: hostap-bounces+jian-song.li=thomson.net at shmoo.com
[mailto:hostap-bounces+jian-song.li=thomson.net at shmoo.com] On Behalf Of
Hyewon Jun
Sent: 2005 09 06 12:56
To: hostap at shmoo.com
Subject: alternative to "ipconfig renew"

Hi,

In window, we can use "ipconfig renew" to obtain a new IP address
using DHCP. Is there a similar command in Linux to obtain a new IP
address
from a DHCP server?

Thank you!
-Hyewon Jun

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