Rt3070芯片动态获取IP地址——station模式(WIFI模块)
Rt3070芯片动态获取IP地址——station模式(WIFI模块)
主机操作系统：Centos 6.7
交叉编译器环境：arm-linux-gcc-4.5.4
开发板平台： FL2440
Linux内核版本： linux-3.0
开发模块： SIM900 WiFI-STA模式
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而我想要的是板子自己去动态随机获取IP联网，这样可以不用给wlan0指定IP。接下我们来完成这个功能。
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一.要支持动态获取的话，你需要在内核中和制作文件系统的内核部分和bysybox部分选中必要的选项
1. 内核部分
Networking --->
Networking support
Networking options --->
Packet socket //添加.配置CONFIG_PACKET
[ * ] IP: DHCP support //添加
[ * ] Network packet filtering (replaces ipchains)
2.busybox部分
[*]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
sudo make install
二．从busybox的examples/udhcp/下copy好simple.script文件到开发板/usr/share/udhcpc/下，并重命名为default.script.注意更改default.script的权限！！！
>: ls
apps data etc init linuxrc proc sbin tmp var
bin dev info lib mnt root sys usr
>: cd usr/
>: ls
bin lib sbin share
>: cd share/
>: ls
>: ls
>: mkdir udhcpc
>: ls
udhcpc
>: cd udhcpc/
>: tftp -gr simple.script 192.168.1.2
simple.script 100% |*******************************| 1074 0:00:00 ETA
>: ls
Simple.script
>: mv simple.script default.script
>: chmod a+x default.script
>: ls
Default.script
连接路由器：
>: wpa_supplicant -Dwext -iwlan0 -c/apps/etc/wireless/wpa_supplicant.conf &
>: phy0 -> rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin'.
phy0 -> rt2x00lib_request_firmware: Info - Firmware detected - version: 0.36.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 0 - CWmin: 3, CWmax: 4, Aifs: 2, TXop: 102.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 1 - CWmin: 4, CWmax: 5, Aifs: 2, TXop: 188.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 2 - CWmin: 5, CWmax: 10, Aifs: 3, TXop: 0.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 3 - CWmin: 5, CWmax: 10, Aifs: 7, TXop: 0.
Trying to associate with d4:ee:07:22:6b:5c (SSID='HiWiFi_LingYun' freq=2452 MHz)
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 2 - CWmin: 5, CWmax: 10, Aifs: 3, TXop: 0.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 3 - CWmin: 4, CWmax: 10, Aifs: 7, TXop: 0.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 1 - CWmin: 3, CWmax: 4, Aifs: 2, TXop: 94.
phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 0 - CWmin: 2, CWmax: 3, Aifs: 2, TXop: 47.
Associated with d4:ee:07:22:6b:5c
WPA: Key negotiation completed with d4:ee:07:22:6b:5c [PTK=CCMP GTK=CCMP]
CTRL-EVENT-CONNECTED - Connection to d4:ee:07:22:6b:5c completed (auth) [id=0 id_str=]
动态获取IP地址：
>: udhcpc -i wlan0
udhcpc (v1.20.2) started
Setting IP address 0.0.0.0 on wlan0
Sending discover...
Sending discover...
Sending select for 192.168.199.245...
Lease of 192.168.199.245 obtained, lease time 43200
Setting IP address 192.168.199.245 on wlan0
Deleting routers
route: SIOCDELRT: No such process
Adding router 192.168.199.1
Recreating /etc/resolv.conf
Adding DNS server 192.168.199.1
>: ping 4.2.2.2
PING 4.2.2.2 (4.2.2.2): 56 data bytes
64 bytes from 4.2.2.2: seq=0 ttl=47 time=433.416 ms
64 bytes from 4.2.2.2: seq=1 ttl=47 time=345.583 ms
64 bytes from 4.2.2.2: seq=2 ttl=47 time=365.502 ms
64 bytes from 4.2.2.2: seq=3 ttl=47 time=385.645 ms
64 bytes from 4.2.2.2: seq=4 ttl=47 time=403.668 ms
64 bytes from 4.2.2.2: seq=5 ttl=47 time=422.573 ms
64 bytes from 4.2.2.2: seq=6 ttl=47 time=339.577 ms
64 bytes from 4.2.2.2: seq=8 ttl=47 time=376.863 ms
64 bytes from 4.2.2.2: seq=9 ttl=47 time=294.990 ms
64 bytes from 4.2.2.2: seq=10 ttl=47 time=413.824 ms
64 bytes from 4.2.2.2: seq=11 ttl=47 time=332.572 ms
--- 4.2.2.2 ping statistics ---
12 packets transmitted, 11 packets received, 8% packet loss
round-trip min/avg/max = 294.990/374.019/433.416 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=45 time=419.097 ms
64 bytes from 8.8.8.8: seq=2 ttl=45 time=459.425 ms
64 bytes from 8.8.8.8: seq=3 ttl=45 time=476.569 ms
64 bytes from 8.8.8.8: seq=4 ttl=45 time=395.526 ms
64 bytes from 8.8.8.8: seq=5 ttl=45 time=414.304 ms
64 bytes from 8.8.8.8: seq=6 ttl=45 time=433.294 ms
64 bytes from 8.8.8.8: seq=7 ttl=45 time=453.372 ms
64 bytes from 8.8.8.8: seq=8 ttl=45 time=471.506 ms
--- 8.8.8.8 ping statistics ---
9 packets transmitted, 8 packets received, 11% packet loss
round-trip min/avg/max = 395.526/440.386/476.569 ms
>: ping www.baidu.com
PING www.baidu.com (119.75.218.70): 56 data bytes
64 bytes from 119.75.218.70: seq=0 ttl=53 time=24.745 ms
64 bytes from 119.75.218.70: seq=1 ttl=53 time=65.137 ms
64 bytes from 119.75.218.70: seq=2 ttl=53 time=66.086 ms
64 bytes from 119.75.218.70: seq=3 ttl=53 time=66.191 ms
64 bytes from 119.75.218.70: seq=4 ttl=53 time=65.276 ms
64 bytes from 119.75.218.70: seq=5 ttl=53 time=23.224 ms
64 bytes from 119.75.218.70: seq=6 ttl=53 time=66.509 ms
--- www.baidu.com ping statistics ---
7 packets transmitted, 7 packets received, 0% packet loss
round-trip min/avg/max = 23.224/53.881/66.509 ms
查看相关网关信息
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default Hiwifi.lan 0.0.0.0 UG 0 0 0 wlan0
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
192.168.199.0 * 255.255.255.0 U 0 0 0 wlan0