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1，下载源码：http://pan.baidu.com/s/1dD8czpJ ，我的百度云盘分享的。

2，解压 tar -zxvf dhcp-3.1.3.tar.gz，然后进入./dhcp-3.1.3/，运行配置./configure，之后生成work.linux-2.2文件夹,进入work.linux-2.2，输入make "CC=arm-linux-gcc -static"，将编译生成dhclient。

3，拷贝生成的dhclient到mini2440开发板上，为方便使用，可以放在/usr/bin/下，需要加可执行权限chmod 777 dhclient；拷贝另外两个配置文件到开发板，分别是/dhcp-3.1.3/client/dhclient.conf和/dhcp-3.1.3/client/scripts/linux 到开发板的/sbin/目录下。并改名后一个文件为dhclient-script，并修改该文件的第一行#! /bin/bash 为#! /bin/sh，保存后，修改权限 chmod +x /sbin/dhclient-script。

4，为eth0 或者ra0配置dhcp服务，输入dhclient eth0 或者dhclient ra0 即可，得到如下信息：

eth0:

Listening on LPF/eth0/08:90:90:90:90:90

Sending on   LPF/eth0/08:90:90:90:90:90 Sending on   Socket/fallback eth0: link up, 100Mbps, full-duplex, lpa 0x41E1 DHCPREQUEST on eth0 to 255.255.255.255 port 67 DHCPNAK from 192.168.1.1 eth0: link down DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 receive_packet failed on eth0: Network is down eth0: link up, 100Mbps, full-duplex, lpa 0x41E1 DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 DHCPREQUEST on eth0 to 255.255.255.255 port 67 DHCPOFFER from 192.168.1.1 DHCPACK from 192.168.1.1 bound to 192.168.1.108 -- renewal in 40380 seconds.

wlan0:

Internet Systems Consortium DHCP Client V3.1.3

Copyright 2004-2009 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/wlan0/00:60:b3:01:92:dc

Sending on   LPF/wlan0/00:60:b3:01:92:dc Sending on   Socket/fallback DHCPREQUEST on wlan0 to 255.255.255.255 port 67 DHCPACK from 192.168.1.1 bound to 192.168.1.106 -- renewal in 41564 seconds.

上一篇写到了2440如何连接热点，继续insmod tr5370sta.ko,然后运行./123.sh,在执行dhclient ra0,2440就可以上网了，如图