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一、编译内核
1.执行make ARCH=arm CROSS_COMPLIE=arm-linux- menuconfig,修改内核配置选项
Networking --->
[*] Networking support
Networking options --->
<* > Packet socket //添加.配置CONFIG_PACKET
[ * ] IP: DHCP support //添加
[ * ] Network packet filtering---> //添加,后面子选项可不选,配置CONFIG_NETFILTER
2. 若没选<* > Packet socket, [ * ] Network packet filtering (replaces ipchains) --->选项,在执行udhcpc命令时出现如下错误:
~ # udhcpcudhcpc (v1.20.2) startedudhcpc: udhcpc (v1.20.2) startedFATAL: couldn't listen on socket, Address family not supported by protocoludhcpc: FATAL: couldn't listen on socket, Address family not supported by protocol
二、编译busybox
配置busybox,添加以下选项
Networking Utilities --->
udhcp Server/Client --->
[] udhcp Server (udhcpd)
[*] udhcp Client (udhcpc) //生成udhcpc命令
[ ] Lease display utility (dumpleases)
[ ] Log udhcp messages to syslog (instead of stdout)
[ ] Compile udhcp with noisy debugging messages
三、使用方法
udhcpc只是获取一个IP,并没有把ip写到指定的网卡中,需要把\busybox\examples\udhcp下的脚本simple.script改名为default.script,放在开发板上的/usr/share/dhcpc/目录下,修改权限为777。
重启开发板,执行udhcpc就可自动获取IP地址了。
udhcpc (v1.20.2) startedSetting IP address 0.0.0.0 on wlan0Sending discover...Sending select for 192.168.6.80...Lease of 192.168.6.80 obtained, lease time 604800Setting IP address 192.168.6.80 on wlan0Deleting routersroute: SIOCDELRT: No such processAdding router 192.168.6.1Recreating /etc/resolv.conf Adding DNS server 219.150.32.132 Adding DNS server 202.96.209.5 Adding DNS server 223.5.5.5
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