dhcp.rar_2440 dh_dhcp_dhcp s3c2440_embedded linux dhcp_s3c2440

1.到 http://www.isc.org/index.pl?/sw/dhcp/ 下载dhcp-3.0.5, 解压后生成dhcp-3.0.5目录， 进入该目录执行./configure，该命令生成work.linux-2.2目录。 进入这个work.linux-2.2目录后，在编译时指定我们的交叉编译器, make "CC=/usr/local/arm/3.4.1/bin/arm-linux-gcc -static" 注：如果编译器是2.95.3会出现一大堆的重定义，所以建议用3.3.2版本的编译器。-static是把dhclient编译器成静态的。 由于我们不想生成的dhclient太大，所以修改work.linux-2.2中，每一个子目录下的Makefile，把其中的DEBUG -g注释掉， 执行编译通过后，在work.linux-2.2/client中，生成的dhclient就是我们想要的了。 [root@localhost client]# file dhclient dhclient: ELF 32-bit LSB executable, ARM, version 1 (ARM), for GNU/Linux 2.0.0, statically linked, not stripped 2.把dhclient 放在/sbin这个目录 （1）dhclient.conf这个文件在只有一个网卡的情况下，可以为空，但在2410上有两个网卡（10M，100M），所以必须指定网卡。其内容如下所示： #Defaults timeout 60; reboot 10; retry 60; select-timeout 5; initial-interval 2; script "/etc/dhclient-script"; interface "eth0" { request subnet-mask, broadcast-address, routers, domain-name-servers, domain-name, host-name; require domain-name-servers; } （2）dhclient-script 放在 /etc下 chmod +x /etc/dhclient-script （3） #/var/state/dhcp/dhclient.lease 上有dhcp服务器反馈的信息.2410上没有这个目录，所以要新建这个目录 设置好这4个文件好，执行 # ./dhclient eth0 Internet Systems Consortium DHCP Client V3.0.5 Copyright 2004-2006 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ Listening on LPF/eth0/00:01:5d:68:7a:0f Sending on LPF/eth0/00:01:5d:68:7a:0f Sending on Socket/fallback DHCPREQUEST on eth0 to 255.255.255.255 port 67 DHCPACK from 192.168.1.1 bound to 192.168.1.127 -- renewal in 2982 seconds. 成功地绑定到192.168.1.127 # ifconfig eth0 Link encap:Ethernet HWaddr 00:01:5D:68:7A:0F inet addr:192.168.1.127 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13 errors:0 dropped:0 overruns:0 frame:0 TX packets:2 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:4712 (4.6 kb) TX bytes:0 (0.0 b) Interrupt:37 Base address:0x300 3.dhclient自生成的另外一些相关信息 （1）/var/run/dhclient.pid dhclinet 的id号 # cat /var/run/dhclient.pid 234 （2） /etc/resolv.conf dhclient 获得的DNS # cat /etc/resolv.conf search domain nameserver 210.34.0.14 nameserver 210.34.0.18 （3）var/state/dhcp/dhclient.leases dhclient从DHCP服务器中获得的全部相关信息 #cat /var/state/dhcp/dhclient.leases lease { interface "eth0"; fixed-address 192.168.1.127; option subnet-mask 255.255.255.0; option dhcp-lease-time 7200; option routers 192.168.1.1; option dhcp-option-overload 3; option dhcp-message-type 5; option dhcp-server-identifier 192.168.1.1; option domain-name-servers 210.34.0.14,210.34.0.18; option domain-name "domain"; renew 5 2003/6/13 17:24:26; rebind 5 2003/6/13 18:15:14; expire 5 2003/6/13 18:30:14; } lease { interface "eth0"; fixed-address 192.168.1.127; option subnet-mask 255.255.255.0; option routers 192.168.1.1; option dhcp-lease-time 7200; option dhcp-option-overload 3; option dhcp-message-type 5; option domain-name-servers 210.34.0.14,210.34.0.18; option dhcp-server-identifier 192.168.1.1; option domain-name "domain"; renew 5 2003/6/13 17:58:58; rebind 5 2003/6/13 18:54:16; expire 5 2003/6/13 19:09:16; } 忘了还有一点： 内核必须支持 CONFIG_PACKET (packet socket) CONFIG_FILTER (socket filtering) 在编译内核时，在network option中选择。