Cudy TR3000 OpenWrt 自定义LED灯

nano /usr/bin/led-network-monitor.sh

#!/bin/sh
# ==========================================================
# Cudy TR3000 OpenWrt LED Network Monitor
# 旁路由模式
#
# 白灯：
#   06:00 - 18:00  网络正常 -> 常亮
#   18:00 - 06:00  网络正常 -> 关闭
#
# 红灯：
#   任意时间网络异常 -> 亮
#
# 优先级：
#   网络故障 > 时间规则
# ==========================================================

# LED节点路径
WHITE_LED="/sys/class/leds/white:status/brightness"
RED_LED="/sys/class/leds/red:power/brightness"

# LAN桥接接口
LAN_BR="br-lan"

# 网络连通性检测地址
PING1="223.5.5.5"
PING2="114.114.114.114"

# 夜间起始小时、结束小时
NIGHT_START=18
NIGHT_END=6

# 状态检测周期(秒)
INTERVAL=15

# 开机等待延时，给系统和AdGuardHome预留初始化时间
sleep 30

# 校验LED设备文件是否存在
[ -e "$WHITE_LED" ] || exit 1
[ -e "$RED_LED" ] || exit 1

# 设置LED亮度，状态不变则跳过写入，减少IO
set_led() {
    WHITE="$1"
    RED="$2"
    CURRENT_WHITE=$(cat "$WHITE_LED" 2>/dev/null)
    CURRENT_RED=$(cat "$RED_LED" 2>/dev/null)

    if [ "$CURRENT_WHITE" = "$WHITE" ] && \
       [ "$CURRENT_RED" = "$RED" ]; then
        return
    fi

    echo "$WHITE" > "$WHITE_LED"
    echo "$RED" > "$RED_LED"
}

# 获取当前小时，去除数字前导0
get_hour() {
    date +%H | sed 's/^0//'
}

# 判断当前时段是否为夜间
is_night() {
    H=$(get_hour)
    if [ "$H" -ge "$NIGHT_START" ] || \
       [ "$H" -lt "$NIGHT_END" ]; then
        return 0
    fi
    return 1
}

# 外网连通检测，两个ping地址任意一个通即判定网络正常
internet_ok() {
    ping -I "$LAN_BR" -c 1 -W 1 "$PING1" >/dev/null 2>&1 && return 0
    ping -I "$LAN_BR" -c 1 -W 1 "$PING2" >/dev/null 2>&1 && return 0
    return 1
}

# 检测LAN物理链路，br-lan下任意端口物理up则链路正常
lan_link_ok() {
    FOUND_PORT=0

    for DEV in /sys/class/net/"$LAN_BR"/brif/*; do
        [ -e "$DEV" ] || continue

        PORT_NAME=$(basename "$DEV")
        CARRIER_FILE="/sys/class/net/$PORT_NAME/carrier"
        [ -f "$CARRIER_FILE" ] || continue

        FOUND_PORT=1
        LINK=$(cat "$CARRIER_FILE" 2>/dev/null)

        if [ "$LINK" = "1" ]; then
            return 0
        fi
    done

    # 找不到物理端口时，不判定链路失败，交给外网检测逻辑
    [ "$FOUND_PORT" = "0" ] && return 0
    return 1
}

# 主循环，优先级：LAN物理链路 > 外网连通性 > 昼夜时间
while true; do
    if ! lan_link_ok; then
        set_led 0 255
    elif ! internet_ok; then
        set_led 0 255
    elif is_night; then
        set_led 0 0
    else
        set_led 255 0
    fi

    sleep "$INTERVAL"
done

chmod +x /usr/bin/led-network-monitor.sh

nano /etc/init.d/led-network

#!/bin/sh /etc/rc.common
START=99
USE_PROCD=1

start_service() {
    procd_open_instance
    procd_set_param command /usr/bin/led-network-monitor.sh
    # 脚本异常退出时自动重启
    procd_set_param respawn
    procd_close_instance
}

chmod +x /etc/init.d/led-network

/etc/init.d/led-network enable