linux - 无线wlan0管理

Question

我实现了一个功能，以便将我的设备连接到一个接入点，该接入点包含:

iw mlan0 connect $SSID
udhcpc -i mlan0
while : ; do
    echo "Pausing until connection established"
    mlan0_ip=`/sbin/ifconfig mlan0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`
    if [ -z "$mlan0_ip" ]
    then            
        sleep 1
    else
        break
    fi
done

我不明白为什么 iw mlan0 connect $SSID 命令一直提示。事实上，它被阻止了

[ 6231.764960] wlan: SCAN COMPLETED: scanned AP count=9
[ 6231.798636] wlan: Connected to bssid 1a:XX:XX:XX:52:66 successfully
[ 6231.808511] IPv6: ADDRCONF(NETDEV_CHANGE): mlan0: link becomes ready
udhcpc (v1.22.1) started
Sending discover...
Sending discover...
Sending discover...
[ 6241.126472] ADDBA RSP: Failed(1a:XX:XX:XX:52:66 tid=6)
Sending discover...
[ 6264.263093] ADDBA RSP: Failed(1a:XX:XX:XX:52:66 tid=6)
Sending select for 192.168.50.33...
[ 6264.497054] ADDBA RSP: Failed(1a:XX:XX:XX:52:66 tid=6)
Lease of 192.168.50.33 obtained, lease time 43200

基本上我从不进入while循环..我想在网络配置后执行一些其他命令

Answer 1

尝试在命令末尾放置一个符号，它将在后台运行，允许执行下一个命令。

iw mlan0 connect $SSID &
udhcpc -i mlan0
while : ; do
    echo "Pausing until connection established"
    mlan0_ip=`/sbin/ifconfig mlan0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`
    if [ -z "$mlan0_ip" ]
    then            
        sleep 1
    else
        break
    fi
done

但我可以在日志中看到一条 udhcpd 消息，然后问题就出在它身上，因为如果 iw 已启动且 udhpcd 已启动但循环未启动，您可以尝试在第二个命令上也加上一个符号。

udhcpc -i mlan0 &