From dc93f35cce69db5fa565c4a14f15bf33b84cff6e Mon Sep 17 00:00:00 2001 From: xzx3344521 Date: Tue, 28 Oct 2025 15:41:35 +0800 Subject: [PATCH] Create DNS --- DNS | 280 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 280 insertions(+) create mode 100644 DNS diff --git a/DNS b/DNS new file mode 100644 index 0000000..7966be5 --- /dev/null +++ b/DNS @@ -0,0 +1,280 @@ +#!/bin/bash + +# 颜色定义 +RED='\033[0;31m' +GREEN='\033[0;32m' +YELLOW='\033[1;33m' +BLUE='\033[0;34m' +PURPLE='\033[0;35m' +CYAN='\033[0;36m' +NC='\033[0m' + +# 日志函数 +log_info() { echo -e "${BLUE}📦 $1${NC}"; } +log_success() { echo -e "${GREEN}✅ $1${NC}"; } +log_warning() { echo -e "${YELLOW}⚠️ $1${NC}"; } +log_error() { echo -e "${RED}❌ $1${NC}"; } +log_result() { echo -e "${CYAN}📊 $1${NC}"; } + +# DNS提供商配置 +declare -A DNS_PROVIDERS=( + ["1"]="腾讯DNS:119.29.29.29,119.28.28.28" + ["2"]="阿里DNS:223.5.5.5,223.6.6.6" + ["3"]="114DNS:114.114.114.114,114.114.115.115" + ["4"]="Cloudflare:1.1.1.1,1.0.0.1" + ["5"]="GoogleDNS:8.8.8.8,8.8.4.4" + ["6"]="OpenDNS:208.67.222.222,208.67.220.220" + ["7"]="百度DNS:180.76.76.76" + ["8"]="CNNICSDNS:1.2.4.8,210.2.4.8" +) + +# 检测当前DNS +detect_current_dns() { + echo -e "${PURPLE}" + echo "==================================================" + echo " 🌈 当前DNS检测结果" + echo "==================================================" + echo -e "${NC}" + + if [ -f /etc/resolv.conf ]; then + current_dns=$(grep -E '^nameserver' /etc/resolv.conf | awk '{print $2}' | tr '\n' ' ') + if [ -n "$current_dns" ]; then + log_result "当前DNS服务器: $current_dns" + + # 识别DNS提供商 + for provider in "${!DNS_PROVIDERS[@]}"; do + dns_ips=${DNS_PROVIDERS[$provider]#*:} + primary_dns=${dns_ips%,*} + if [[ "$current_dns" == *"$primary_dns"* ]]; then + provider_name=${DNS_PROVIDERS[$provider]%:*} + log_success "识别为: $provider_name" + break + fi + done + else + log_warning "未检测到DNS配置" + fi + else + log_error "未找到 resolv.conf 文件" + fi + echo "" +} + +# 测试DNS速度 +test_dns_speed() { + local dns_ips=$1 + local provider_name=$2 + + log_info "测试 $provider_name 速度..." + IFS=',' read -ra dns_array <<< "$dns_ips" + + for dns_ip in "${dns_array[@]}"; do + if ping -c 2 -W 2 "$dns_ip" >/dev/null 2>&1; then + start_time=$(date +%s%N) + nslookup baidu.com "$dns_ip" >/dev/null 2>&1 + end_time=$(date +%s%N) + time_ms=$(( (end_time - start_time) / 1000000 )) + + if [ $time_ms -lt 50 ]; then + echo -e " ${GREEN}$dns_ip: ${time_ms}ms ✅${NC}" + elif [ $time_ms -lt 100 ]; then + echo -e " ${YELLOW}$dns_ip: ${time_ms}ms ⚠️${NC}" + else + echo -e " ${RED}$dns_ip: ${time_ms}ms ❌${NC}" + fi + else + echo -e " ${RED}$dns_ip: 无法连接 ❌${NC}" + fi + done +} + +# 显示DNS菜单 +show_dns_menu() { + echo -e "${PURPLE}" + echo "==================================================" + echo " 🌈 主流DNS提供商" + echo "==================================================" + echo -e "${NC}" + + for key in "${!DNS_PROVIDERS[@]}"; do + provider_name=${DNS_PROVIDERS[$key]%:*} + dns_ips=${DNS_PROVIDERS[$key]#*:} + echo -e " ${CYAN}$key. $provider_name${NC}" + echo -e " ${BLUE}$dns_ips${NC}" + done + echo "" +} + +# 临时设置DNS +set_dns_temporary() { + local provider_key=$1 + local provider_name=${DNS_PROVIDERS[$provider_key]%:*} + local dns_ips=${DNS_PROVIDERS[$provider_key]#*:} + + log_info "临时设置为: $provider_name" + + # 备份当前配置 + cp /etc/resolv.conf /etc/resolv.conf.backup.$(date +%Y%m%d_%H%M%S) + + # 生成新的resolv.conf + echo "# 临时设置 - $provider_name ($(date))" > /etc/resolv.conf + IFS=',' read -ra dns_array <<< "$dns_ips" + for dns_ip in "${dns_array[@]}"; do + echo "nameserver $dns_ip" >> /etc/resolv.conf + done + echo "options timeout:2 attempts:3" >> /etc/resolv.conf + + log_success "临时DNS设置完成 (重启后恢复)" +} + +# 永久设置DNS +set_dns_permanent() { + local provider_key=$1 + local provider_name=${DNS_PROVIDERS[$provider_key]%:*} + local dns_ips=${DNS_PROVIDERS[$provider_key]#*:} + + log_info "永久设置为: $provider_name" + + # 备份当前配置 + cp /etc/resolv.conf /etc/resolv.conf.backup.$(date +%Y%m%d_%H%M%S) + + # 检查并禁用systemd-resolved + if systemctl is-active systemd-resolved >/dev/null 2>&1; then + log_warning "检测到systemd-resolved，正在禁用..." + systemctl stop systemd-resolved + systemctl disable systemd-resolved + fi + + # 生成永久配置 + echo "# 永久设置 - $provider_name ($(date))" > /etc/resolv.conf + IFS=',' read -ra dns_array <<< "$dns_ips" + for dns_ip in "${dns_array[@]}"; do + echo "nameserver $dns_ip" >> /etc/resolv.conf + done + echo "options timeout:2 attempts:3" >> /etc/resolv.conf + + # 防止NetworkManager覆盖 + if command -v NetworkManager >/dev/null 2>&1; then + log_info "配置NetworkManager..." + nmcli connection show | grep -v NAME | awk '{print $1}' | while read conn; do + nmcli connection modify "$conn" ipv4.ignore-auto-dns yes + for dns_ip in "${dns_array[@]}"; do + nmcli connection modify "$conn" ipv4.dns "$dns_ip" + done + done + fi + + # 设置文件属性防止被覆盖 + chattr +i /etc/resolv.conf 2>/dev/null || true + + log_success "永久DNS设置完成" +} + +# 恢复备份 +restore_backup() { + local backup_files=($(ls -t /etc/resolv.conf.backup.* 2>/dev/null)) + + if [ ${#backup_files[@]} -eq 0 ]; then + log_error "未找到备份文件" + return 1 + fi + + echo -e "${YELLOW}可用的备份文件:${NC}" + for i in "${!backup_files[@]}"; do + echo " $((i+1)). ${backup_files[$i]}" + done + + read -p "选择要恢复的备份编号 (1-${#backup_files[@]}): " backup_choice + if [[ $backup_choice =~ ^[0-9]+$ ]] && [ $backup_choice -ge 1 ] && [ $backup_choice -le ${#backup_files[@]} ]; then + selected_backup="${backup_files[$((backup_choice-1))]}" + + # 解除文件锁定 + chattr -i /etc/resolv.conf 2>/dev/null || true + + cp "$selected_backup" /etc/resolv.conf + log_success "已从 $selected_backup 恢复DNS设置" + else + log_error "无效的选择" + fi +} + +# 主函数 +main() { + # 检测当前DNS + detect_current_dns + + while true; do + echo -e "${PURPLE}" + echo "==================================================" + echo " 🌈 DNS切换管理脚本" + echo "==================================================" + echo -e "${NC}" + + echo -e "${CYAN}请选择操作:${NC}" + echo " 1. 切换DNS提供商" + echo " 2. 测试所有DNS速度" + echo " 3. 恢复DNS备份" + echo " 4. 显示当前DNS" + echo " 5. 退出" + echo "" + + read -p "请输入选择 (1-5): " main_choice + + case $main_choice in + 1) + show_dns_menu + read -p "选择DNS提供商 (1-8): " dns_choice + if [[ -n "${DNS_PROVIDERS[$dns_choice]}" ]]; then + echo "" + echo -e "${CYAN}请选择设置方式:${NC}" + echo " 1. 临时设置 (重启后失效)" + echo " 2. 永久设置" + read -p "请输入选择 (1-2): " set_type + + case $set_type in + 1) set_dns_temporary "$dns_choice" ;; + 2) set_dns_permanent "$dns_choice" ;; + *) log_error "无效的选择" ;; + esac + else + log_error "无效的DNS选择" + fi + ;; + 2) + echo "" + log_info "测试所有DNS提供商速度..." + for key in "${!DNS_PROVIDERS[@]}"; do + provider_name=${DNS_PROVIDERS[$key]%:*} + dns_ips=${DNS_PROVIDERS[$key]#*:} + test_dns_speed "$dns_ips" "$provider_name" + echo "" + done + ;; + 3) + restore_backup + ;; + 4) + detect_current_dns + ;; + 5) + log_success "再见！" + exit 0 + ;; + *) + log_error "无效的选择" + ;; + esac + + echo "" + read -p "按回车键继续..." + clear + done +} + +# 脚本入口 +if [ "$(id -u)" -ne 0 ]; then + log_error "请使用root权限运行此脚本" + exit 1 +fi + +main