如何用wap_cli启动wifi-优快云博客

本文链接：https://blog.youkuaiyun.com/shexujia/article/details/18302007

本文介绍了如何通过运行wpa_supplicant和wpa_cli工具来启动和连接WiFi。首先，使用wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf启动服务，并确保其正在运行。接着，利用wpa_cli连接到wlan0接口，通过scan、scan_results、status等命令进行网络扫描、查看结果和检查连接状态。此外，还提供了add_network、set_network等命令来设置网络参数，以及路由修改指令route add default gw 192.168.43.1。

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1: 运行 wpa_supplicant first

先查看wpa_supplicant 选项：

root@hi-target:~# wpa_supplicant -h
usage:
  wpa_supplicant [-BddhKLqqstuvW] [-P<pid file>] [-g<global ctrl>] \
        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] [-p<driver_param>] \
        [-b<br_ifname>] [-f<debug file>] [-e<entropy file>] \
        [-o<override driver>] [-O<override ctrl>] \
        [-N -i<ifname> -c<conf> [-C<ctrl>] [-D<driver>] \
        [-p<driver_param>] [-b<br_ifname>] ...]
 
drivers:
  nl80211 = Linux nl80211/cfg80211 //驱动名称
options:
  -b = optional bridge interface name
  -B = run daemon in the background
  -c = Configuration file
  -C = ctrl_interface parameter (only used if -c is not)
  -i = interface name
  -d = increase debugging verbosity (-dd even more)
  -D = driver name (can be multiple drivers: nl80211,wext)
  -e = entropy file
  -g = global ctrl_interface
  -K = include keys (passwords, etc.) in debug output
  -t = include timestamp in debug messages
  -h = show this help text
  -L = show license (BSD)
  -o = override driver parameter for new interfaces
  -O = override ctrl_interface parameter for new interfaces
  -p = driver parameters
  -P = PID file
  -q = decrease debugging verbosity (-qq even less)
  -v = show version
  -W = wait for a control interface monitor before starting
  -N = start describing new interface
example:
  wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf

使用如下命令运行：

wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf

(use “ps”to make sure wpa_supplicant is running )

2: 运行 wpa_cli 工具连接 wifi

wpa_cli -i wlan0

常用命令如下:

>scan = to scan the neighboring AP

>scan_results = show the scan results

>status = check out the current connection information

>terminate = terminate wpa_supplicant

>quit = exit wpa_cli

>add_network = it will return a network id to you

>set_network <network id> <variable> <value> = set network variables (shows

list of variables when run without arguments), success will return OK, or will return Fail

>select_network <network id> = select a network (disable others)

>disable_network <network id> = disable a network

>enable_network <network id> = enable a network

3:关联无线网络，不同的无线网络认证方式不同设置：

1）open(开放式认证方式，分为):

wpa_cli -iwlan0 set_network 0 ssid '"wlan"'(PS:wlan是无线的ssid号，外面是一对双引号，然后再外面是一对单引号)

wpa_cli -iwlan0 set_network 0 key_mgmt NONE

2）wep（分为开放式和共享式）:

wpa_cli -iwlan0 set_network 0 ssid '"wlan"'

wpa_cli -iwlan0 set_network 0 key_mgmt NONE

wpa_cli -iwlan0 set_network 0 wep_key0 '"wlan_key"'

如果是共享式,还需要配置：wpa_cli -iwlan0 set_network 0 auth_alg SHARED(默认是开放式，可以不配置)

3)WPA/WPA2-Personal认证方式：

wpa_cli -iwlan0 set_network 0 ssid '"wlan"'

wpa_cli -iwlan0 set_network 0 key_mgmt WPA-PSK

wpa_cli -iwlan0 set_network 0 proto WPA(WPA2)

wpa_cli -iwlan0 set_network 0 pairwise TKIP(CCMP)

wpa_cli -iwlan0 set_network 0 group TKIP(CCMP)

wpa_cli -iwlan0 set_network 0 psk '"wlan_password"'

4)WPA/WPA2-Enterprise认证方式：

wpa_cli -iwlan0 set_network 0 ssid '"wlan"'

wpa_cli -iwlan0 set_network 0 key_mgmt WPA-EAP

wpa_cli -iwlan0 set_network 0 pairwise TKIP(CCMP)

wpa_cli -iwlan0 set_network 0 group TKIP(CCMP)

wpa_cli -iwlan0 set_network 0 eap PEAP

wpa_cli -iwlan0 set_network 0 identity '"username"'

wpa_cli -iwlan0 set_network 0 password '"password"'

如果是WPA2-Enterprise认证：需要设置proto：wpa_cli -iwlan0 set_network 0 protoWPA2

然后开始关联：wpa_cli -iwlan0 enable_network 0

如果dhcp获取ip地址，需要等关联上之后去dhcp；查看关联状态wpa_cli -iwlan0 status

如果状态是complete的话：dhcp wlan0

一般操作过程是，先查看无线网络，是否要关联的无线网络可见：

wpa_cli -iwlan0 scan

wpa_cli -iwlan0 scan_results

如果可见，则如上配置network 0，然后关联：

wpa_cli -iwlan0 enable_network 0

wpa_cli -iwlan0 status如果关联上，dhcp wlan0

之后如果解关联，需要先释放IP，然后up端口，然后解关联：

dhcp -r wlan0

(需要等待一会，等待release完ip)

然后ifconfig wlan0 up

最后wpa_cli -iwlan0 disable_network 0

4. udhcpc -i wlan0 //

route add default gw 192.168.43.1 //修改网关