openwrt 域名过滤功能通过dnsmasq实现

OpenWrt中配置dnsmasq的域名过滤功能，主要是配置/etc/dnsmasq.conf文件中增加

conf-file=/etc/data/blocklist.conf 这个配置我们过滤的域名文件

用脚本/usr/sbin/domain_blocklist.sh实现对blocklist.conf的域名设置如下：

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#!/bin/sh

BLOCKLIST_FILE="/etc/data/blocklist.conf"

DOMAINS=$(uci get firewall.blocklist.domains 2>/dev/null)  #从firewall.blocklist.domains配置获取需要过滤的域名

echo "# Domain blacklist generated on $(date)" > $BLOCKLIST_FILE

for domain in $DOMAINS; do
    domain=$(echo "$domain" | xargs)

    if [ -z "$domain" ]; then
        continue
    fi

    if echo "$domain" | grep -qE '^[a-zA-Z0-9-]+\.[a-zA-Z]{2,}$' && ! echo "$domain" | grep -qE '\.[a-zA-Z0-9-]+\.[a-zA-Z]{2,}$'; then
        echo "address=/.$domain/0.0.0.0" >> "$BLOCKLIST_FILE"
        echo "address=/.$