所有的wifi driver放在/lib/wifi目录下，如：

1 2	`root@OpenWrt:/# ls /lib/wifi` `mac80211.sh`

wifi配置文件The WiFi settings are configured in the file /etc/config/wireless

root@OpenWrt:/# cat /etc/config/wireless

config wifi-device 'radio0'

option type 'mac80211'

option channel '36'

option hwmode '11a'

option path 'pci0000:00/0000:00:00.0'

option htmode 'VHT80'

option __toggle 'Enable'

option country 'US'

option legacy_rates '1'

config wifi-iface 'default_radio0'

option device 'radio0'

option network 'lan'

option mode 'ap'

option ssid 'OpenWrt'

option encryption 'none'

config wifi-device 'radio1'

option type 'mac80211'

option channel '11'

option hwmode '11g'

option path 'platform/qca956x_wmac'

option htmode 'HT20'

option disabled '1'

config wifi-iface 'default_radio1'

option device 'radio1'

option network 'lan'

option mode 'ap'

option ssid 'OpenWrt'

option encryption 'none

Each wireless driver has its own configuration script in /lib/wifi/driver_name.sh which handles driver specific options and configurations. This script is also calling driver specific binaries like wlc for Broadcom, or hostapd and wpa_supplicant for atheros.

控制命令是/sbin/wifi，这是一个脚本，支持wifi up，wifi up，wifi config，wifi status，wifi reload命令。

wifi命令是和配置打交道和生成配置，然后最后通过发送ubus命令给netifd生效。

wifi配置生效脚本

/lib/netifd/wireless/mac80211.sh，netifd调用这个脚本，这个脚本使用iw命令创建vap，启动hostapd, wpa_supplicant。这个脚本包含/lib/netifd/netifd-wireless.sh和/lib/netifd/hostapd.sh两个脚本。

比如：

mac80211 teardown radio1 {"config":{"channel":"36","hwmode":"11a","path":"platform/soc/a800000.wifi","htmode":"VHT80","disabled":false},"data":{"phy":"phy1"},"interfaces":{"0":{"bridge":"br-lan","config":{"mode":"ap","ssid":"OpenWrt","encryption":"none","network":["lan"],"mode":"ap"},"data":{"ifname":"wlan1"}}}

mac80211 setup radio1 {"config":{"channel":"36","hwmode":"11a","path":"platform/soc/a800000.wifi","htmode":"VHT80","disabled":false},"interfaces":{"0":{"bridge":"br-lan","config":{"mode":"ap","ssid":"OpenWrt","encryption":"none","network":["lan"],"mode":"ap"}}}}

iw phy1 info
iw phy phy1 set antenna 0xffffffff 0xffffffff
iw phy phy1 set antenna_gain 0
iw phy phy1 set distance 0
iw phy phy1 info
iw phy phy1 info
iw phy phy1 interface add wlan1 type __ap

root@OpenWrt:/# ls /lib/modules/4.9.123/

ath.ko nf_log_ipv4.ko

ath10k_core.ko nf_log_ipv6.ko

ath10k_pci.ko nf_nat.ko

ath9k.ko nf_nat_ipv4.ko

ath9k_common.ko nf_nat_masquerade_ipv4.ko

ath9k_hw.ko nf_nat_redirect.ko

cfg80211.ko nf_reject_ipv4.ko

compat.ko nf_reject_ipv6.ko

crc-ccitt.ko ppp_async.ko

gpio-button-hotplug.ko ppp_generic.ko

ip6_tables.ko pppoe.ko

ip6t_REJECT.ko pppox.ko

ip6table_filter.ko slhc.ko

ip6table_mangle.ko x_tables.ko

ip_tables.ko xt_LOG.ko

ipt_MASQUERADE.ko xt_REDIRECT.ko

ipt_REJECT.ko xt_TCPMSS.ko

iptable_filter.ko xt_comment.ko

iptable_mangle.ko xt_conntrack.ko

iptable_nat.ko xt_limit.ko

mac80211.ko xt_mac.ko

nf_conntrack.ko xt_mark.ko

nf_conntrack_ipv4.ko xt_multiport.ko

nf_conntrack_ipv6.ko xt_nat.ko

nf_conntrack_rtcache.ko xt_state.ko

nf_defrag_ipv4.ko xt_tcpudp.ko

nf_defrag_ipv6.ko xt_time.ko

nf_log_common.ko

https://archive.openwrt.org/kamikaze/8.09.2/docs/openwrt.html#x1-120001.2.2

ILD

wifi配置生效脚本