FL2440WiFi学习之rt3070无线网卡动态获取IP上网

时间：2021-11-03 16:05:37

主机操作系统：Centos 6.7
交叉编译器版本：buildroot-2012.08 
开发板平台： FL2440 
Linux内核版本： linux-3.0 
开发模块：rt3070无线网卡动态获取IP上网



之前我们需要自己手动设置IP来上网，现在让它动态获取IP自己上网。


一、修改内核

Networking --->
    Networking support   
    Networking options ---> 
           Packet socket                 //添加.配置CONFIG_PACKET
          [ * ]     IP: DHCP support        //DHCP（Dynamic Host Configuration Protocol，动态主机配置协议）

          [ * ] Network packet filtering (replaces ipchains)


make,将生成的内核文件装到开发板上


二、修改busybox（busybox的安装方法在我的博客根文件系统制作里有）

[*]udhcp server(udhcpd)
[*]udhcp client(udhcpc)都选上
udhcpd就是终端设备作为DHCP服务器 ；udhcpc就是终端设备作为DHCP客户端
Networking Utilities --->
 [*] udhcp client for DHCPv6 (udhcpc6)                                            
 [*] udhcp server (udhcpd)  //生成udhcpc命令

make编译后把Busybox的examples/udhcp/simple.script 拷贝到开发板/usr/share/udhcpc/下，并重命名为default.script，然后更改文件default.script的权限为777

>: chmod 777 /usr/share/udhcpc/default.script 
>: ll /usr/share/udhcpc/default.script 
-rwxrwxrwx    1 root     root

三、连接路由器 


>: wpa_supplicant -Dwext -iwlan0 -c/apps/etc/wireless/wpa_supplicant.conf &
>: Trying to associate with c0:61:18:f5:3e:62 (SSID='Router_LingYun' freq=2462 MHz)
Associated with c0:61:18:f5:3e:62
WPA: Key negotiation completed with c0:61:18:f5:3e:62 [PTK=CCMP GTK=TKIP]
CTRL-EVENT-CONNECTED - Connection to c0:61:18:f5:3e:62 completed (auth) [id=0 id_str=]
WPA: Group rekeying completed with c0:61:18:f5:3e:62 [GTK=TKIP]

>:


四、动态获取IP地址 


>: udhcpc -i wlan0
udhcpc (v1.20.2) started
Sending discover...
Sending select for 192.168.2.112...
Lease of 192.168.2.112 obtained, lease time 7200
deleting routers
route: SIOCDELRT: No such process
adding dns 114.114.114.114
adding dns 202.103.24.68
udhcp会以守护进程方式在后台运行


五、测试

>: ping www.baidu.com
PING www.baidu.com (180.97.33.108): 56 data bytes
64 bytes from 180.97.33.108: seq=0 ttl=54 time=21.746 ms
64 bytes from 180.97.33.108: seq=1 ttl=54 time=62.449 ms
64 bytes from 180.97.33.108: seq=2 ttl=54 time=65.329 ms
64 bytes from 180.97.33.108: seq=3 ttl=54 time=64.575 ms
64 bytes from 180.97.33.108: seq=4 ttl=54 time=61.608 ms
64 bytes from 180.97.33.108: seq=5 ttl=54 time=62.624 ms
^C
--- www.baidu.com ping statistics ---
6 packets transmitted, 6 packets received, 0% packet loss
round-trip min/avg/max = 21.746/56.388/65.329 ms

>: ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: seq=0 ttl=38 time=416.030 ms
64 bytes from 8.8.8.8: seq=1 ttl=38 time=433.437 ms
64 bytes from 8.8.8.8: seq=2 ttl=38 time=452.338 ms
64 bytes from 8.8.8.8: seq=3 ttl=38 time=472.499 ms
^C
--- 8.8.8.8 ping statistics ---
5 packets transmitted, 4 packets received, 20% packet loss
round-trip min/avg/max = 416.030/443.576/472.499 ms

查看ip信息 


>: ifconfig
eth0      Link encap:Ethernet  HWaddr 82:D2:A6:D4:EF:3E  
          inet addr:192.168.2.2  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:213 errors:0 dropped:0 overruns:0 frame:0
          TX packets:140 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:18995 (18.5 KiB)  TX bytes:16569 (16.1 KiB)
          Interrupt:51 Base address:0x4300 

wlan0     Link encap:Ethernet  HWaddr 00:A1:B0:40:6E:F7  
inet addr:192.168.2.112  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:126 errors:0 dropped:89 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:21718 (21.2 KiB)  TX bytes:3114 (3.0 KiB)

>: route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.2.1     0.0.0.0         UG    0      0        0 wlan0
192.168.2.0     *               255.255.255.0   U     0      0        0 eth0
192.168.2.0     *               255.255.255.0   U     0      0        0 wlan0

Ok


问题总结：


1、busybox 配置及make menuconfig 无法删除标识的问题

点击secureCRT的选项—>会话选项—>终端—>映射键，在右边的菜单框中，把其他映射选项下的“Backspace 发送delete（B）”选项勾上就可以解决问题了

FL2440WiFi学习之rt3070无线网卡动态获取IP上网


参考：http://www.th7.cn/system/lin/201508/124552.shtml


2、无法自动获取IP

>: udhcpc -i wlan0
udhcpc (v1.20.2) started
/usr/share/udhcpc/default.script: exec: line 7: /usr/share/udhcpc/sample.deconfig: not found
Sending discover...
Sending select for 192.168.199.223...
Lease of 192.168.199.223 obtained, lease time 43200
/usr/share/udhcpc/default.script: exec: line 7: /usr/share/udhcpc/sample.bound: not found

sample.bound: not found

Busybox的examples/udhcp/下有sample.bound，放到开发板/usr/share/udhcpc/下给777权限。

>: udhcpc -i wlan0
udhcpc (v1.20.2) started
Sending discover...
Sending select for 192.168.199.223...
Lease of 192.168.199.223 obtained, lease time 43200
deleting routers
route: SIOCDELRT: No such process
/usr/share/udhcpc/sample.bound: line 25: can't create /etc/udhcpc/resolv.conf: nonexistent directory
去到etc目录下，mkdir udhcpc文件夹，将之前做好的resolv.conf放到这个路径下 参考：http://blog.csdn.net/hshl1214/article/details/8684740 解决Ok
上面的IP设置有问题，无法上网，后面我改了。就是上面做的正确方法，这里记录问题是提供解决思路和方法参考。


标签：

相关文章