#!/bin/bash

# 检查参数是否为空
if [ $# -eq 0 ]; then
    echo "用法: $0 <目标地址>"
    echo "示例: $0 8.8.8.8"
    echo "      $0 www.example.com"
    echo "功能: 持续ping指定目标，按Ctrl+C显示统计结果"
    exit 1
fi

TARGET=$1

# 初始化计数器
total_packets=0
timeout_packets=0

# 定义中断处理函数
cleanup() {
    echo -e "\n===== 测试结果 ====="
    echo "目标地址: $TARGET"
    echo "累计请求次数: $total_packets"
    echo "超时次数: $timeout_packets"
    
    # 计算错误比例
    if [ $total_packets -gt 0 ]; then
        error_rate=$(echo "scale=2; $timeout_packets / $total_packets * 100" | bc)
        echo "错误比例: $error_rate%"
    else
        echo "错误比例: 0%"
    fi
    exit 0
}

# 捕获SIGINT信号(ctrl+c)
trap cleanup SIGINT

# 提示信息
echo "开始网络断流测试，按Ctrl+C结束..."
echo "目标地址: $TARGET"
echo "----------------------------------------"

# 持续ping测试
while true; do
    # 发送一个ping包，超时时间为2秒
    ping -c 1 -W 2 $TARGET > /dev/null 2>&1
    
    # 检查ping命令的退出状态
    if [ $? -ne 0 ]; then
        echo "$(date '+%Y-%m-%d %H:%M:%S') - 超时"
        ((timeout_packets++))
    else
        echo "$(date '+%Y-%m-%d %H:%M:%S') - 正常"
    fi
    
    ((total_packets++))
    
    # 每秒钟发送一个ping包
    sleep 1
done