代码位置：Android/external/iw
查看支持的命令：
console:/ # iw help
Usage: iw [options] command
Options:
--debug enable netlink debugging
--version show version (4.1)
Commands:
help [command]
Print usage for all or a specific command, e.g.
"help wowlan" or "help wowlan enable".
event [-t] [-r] [-f]
Monitor events from the kernel.
-t - print timestamp
-r - print relative timstamp
-f - print full frame for auth/assoc etc.
phy <phyname> info
Show capabilities for the specified wireless device.
list
List all wireless devices and their capabilities.
phy
commands
list all kno
