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#!/bin/bash
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# 颜色定义
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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PURPLE='\033[0;35m'
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CYAN='\033[0;36m'
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NC='\033[0m' # No Color
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# 显示标题
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echo -e "${CYAN}"
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echo "================================================"
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echo " 网络连接诊断工具 v2.0"
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echo "================================================"
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echo -e "${NC}"
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# 函数：显示帮助信息
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show_help() {
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echo -e "${YELLOW}使用说明：${NC}"
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echo "1. 本工具用于测试网络连接和端口状态"
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echo "2. 支持IP地址和域名测试"
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echo "3. 可以测试多个端口"
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echo "4. 包含详细的连接状态分析"
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echo ""
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}
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# 函数：输入IP/域名
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input_target() {
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while true; do
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echo -e "${BLUE}请输入要测试的目标IP地址或域名：${NC}"
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read -p "目标地址: " TARGET
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if [ -z "$TARGET" ]; then
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echo -e "${RED}错误：目标地址不能为空！${NC}"
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continue
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fi
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# 简单验证格式
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if [[ "$TARGET" =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]] || [[ "$TARGET" =~ ^[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ ]]; then
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break
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else
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echo -e "${RED}错误：请输入有效的IP地址或域名！${NC}"
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fi
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done
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}
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# 函数：输入端口
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input_ports() {
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echo -e "${BLUE}请输入要测试的端口（多个端口用空格分隔）：${NC}"
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read -p "端口: " PORTS_INPUT
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if [ -z "$PORTS_INPUT" ]; then
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echo -e "${YELLOW}警告：未输入端口，使用默认端口 25555${NC}"
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PORTS=("25555")
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else
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# 将输入的端口转换为数组
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PORTS=($PORTS_INPUT)
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fi
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}
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# 函数：Ping测试
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ping_test() {
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echo -e "\n${PURPLE}=== Ping 连通性测试 ===${NC}"
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echo -e "目标: ${YELLOW}$TARGET${NC}"
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if ping -c 4 -W 2 "$TARGET" &> /dev/null; then
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echo -e "${GREEN}✓ Ping 测试成功 - 网络连通正常${NC}"
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PING_RESULT=$(ping -c 4 -W 2 "$TARGET" | grep -E "packets transmitted|min/avg/max")
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echo "$PING_RESULT"
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else
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echo -e "${RED}✗ Ping 测试失败 - 网络不通${NC}"
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return 1
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fi
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}
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# 函数：端口扫描测试
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port_scan_test() {
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local port=$1
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echo -e "\n${PURPLE}=== 端口 $port 测试 ===${NC}"
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# 测试1: nc 命令
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echo -e "${CYAN}[测试1] NC 端口扫描...${NC}"
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if command -v nc &> /dev/null; then
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if nc -zv -w 3 "$TARGET" "$port" &> /dev/null; then
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echo -e "${GREEN}✓ NC 测试 - 端口 $port 开放${NC}"
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else
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echo -e "${RED}✗ NC 测试 - 端口 $port 关闭或无法连接${NC}"
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fi
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else
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echo -e "${YELLOW}⚠ NC 命令未安装，跳过此测试${NC}"
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fi
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# 测试2: TCP 连接测试
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echo -e "${CYAN}[测试2] TCP 连接测试...${NC}"
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if timeout 3 bash -c "echo > /dev/tcp/$TARGET/$port" 2>/dev/null; then
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echo -e "${GREEN}✓ TCP 测试 - 端口 $port 可连接${NC}"
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else
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echo -e "${RED}✗ TCP 测试 - 端口 $port 无法连接${NC}"
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fi
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# 测试3: telnet 测试（如果可用）
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echo -e "${CYAN}[测试3] Telnet 测试...${NC}"
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if command -v telnet &> /dev/null; then
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if timeout 3 telnet "$TARGET" "$port" 2>&1 | grep -q "Connected"; then
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echo -e "${GREEN}✓ Telnet 测试 - 端口 $port 可连接${NC}"
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else
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echo -e "${RED}✗ Telnet 测试 - 端口 $port 无法连接${NC}"
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fi
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else
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echo -e "${YELLOW}⚠ Telnet 命令未安装，跳过此测试${NC}"
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fi
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}
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# 函数：DNS解析测试
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dns_test() {
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echo -e "\n${PURPLE}=== DNS 解析测试 ===${NC}"
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if [[ "$TARGET" =~ ^[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ ]]; then
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echo -e "${CYAN}检测到域名，进行DNS解析...${NC}"
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if nslookup "$TARGET" &> /dev/null; then
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echo -e "${GREEN}✓ DNS 解析成功${NC}"
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nslookup "$TARGET" | grep -A 10 "Name:"
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else
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echo -e "${RED}✗ DNS 解析失败${NC}"
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fi
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else
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echo -e "${CYAN}检测到IP地址，跳过DNS解析测试${NC}"
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fi
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}
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# 函数：路由跟踪
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trace_route() {
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echo -e "\n${PURPLE}=== 路由跟踪测试 ===${NC}"
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echo -e "${YELLOW}是否进行路由跟踪？(y/n, 可能需要较长时间)${NC}"
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read -p "选择: " DO_TRACE
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if [[ "$DO_TRACE" == "y" || "$DO_TRACE" == "Y" ]]; then
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if command -v traceroute &> /dev/null; then
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echo -e "${CYAN}开始路由跟踪...${NC}"
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traceroute -m 15 "$TARGET"
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elif command -v tracepath &> /dev/null; then
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echo -e "${CYAN}开始路由跟踪 (使用 tracepath)...${NC}"
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tracepath "$TARGET"
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else
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echo -e "${YELLOW}⚠ 路由跟踪命令未安装${NC}"
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fi
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fi
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}
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# 函数：生成测试报告
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generate_report() {
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echo -e "\n${PURPLE}=== 测试报告 ===${NC}"
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echo -e "测试时间: $(date)"
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echo -e "目标地址: ${YELLOW}$TARGET${NC}"
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echo -e "测试端口: ${YELLOW}${PORTS[*]}${NC}"
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# 汇总结果
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echo -e "\n${CYAN}汇总结果:${NC}"
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if ping -c 1 -W 2 "$TARGET" &> /dev/null; then
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echo -e "${GREEN}● 网络连通性: 正常${NC}"
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else
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echo -e "${RED}● 网络连通性: 异常${NC}"
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fi
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echo -e "● 端口状态:"
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for port in "${PORTS[@]}"; do
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if timeout 2 bash -c "echo > /dev/tcp/$TARGET/$port" 2>/dev/null; then
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echo -e " 端口 $port: ${GREEN}开放${NC}"
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else
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echo -e " 端口 $port: ${RED}关闭${NC}"
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fi
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done
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}
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# 主函数
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main() {
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# 显示帮助信息
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show_help
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# 获取用户输入
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input_target
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input_ports
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echo -e "\n${GREEN}开始网络诊断测试...${NC}"
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echo -e "目标: ${YELLOW}$TARGET${NC}"
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echo -e "端口: ${YELLOW}${PORTS[*]}${NC}"
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echo ""
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# 执行各项测试
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dns_test
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ping_test
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ping_result=$?
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# 如果ping不通，询问是否继续
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if [ $ping_result -ne 0 ]; then
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echo -e "\n${YELLOW}警告: Ping 测试失败，目标可能无法访问${NC}"
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echo -e "${YELLOW}是否继续端口测试？(y/n)${NC}"
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read -p "选择: " CONTINUE
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if [[ "$CONTINUE" != "y" && "$CONTINUE" != "Y" ]]; then
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echo -e "${RED}测试终止${NC}"
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exit 1
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fi
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fi
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# 端口测试
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for port in "${PORTS[@]}"; do
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port_scan_test "$port"
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done
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# 路由跟踪
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trace_route
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# 生成报告
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generate_report
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echo -e "\n${GREEN}网络诊断完成！${NC}"
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}
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# 检查必要命令
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check_requirements() {
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local missing=()
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for cmd in ping nc timeout; do
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if ! command -v "$cmd" &> /dev/null; then
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missing+=("$cmd")
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fi
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done
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if [ ${#missing[@]} -gt 0 ]; then
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echo -e "${RED}错误: 缺少必要的命令: ${missing[*]}${NC}"
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echo -e "${YELLOW}请安装缺少的命令后重新运行脚本${NC}"
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exit 1
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fi
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}
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# 脚本入口
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if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
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show_help
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exit 0
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fi
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# 检查系统要求
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check_requirements
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# 运行主程序
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main
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