#!/bin/bash

# 检查并安装依赖
if ! command -v traceroute &> /dev/null; then
    apt update && apt install -y traceroute > /dev/null 2>&1 || yum install -y traceroute > /dev/null 2>&1
fi

declare -A nodes=( ["中国电信"]="202.96.209.133" ["中国联通"]="210.21.196.6" ["中国移动"]="211.136.25.153" )
declare -A summary

echo "======================================================="
echo "正在执行：VPS -> 国内运营商 (回程测试)"
echo "======================================================="

for isp in "中国电信" "中国联通" "中国移动"; do
    ip=${nodes[$isp]}
    ping_val=$(ping -c 4 -i 0.2 -W 1 "$ip" | awk -F '/' 'END {print $5}')
    [ -z "$ping_val" ] && ping_val="超时" || ping_val="${ping_val}ms"
    
    res=$(traceroute -n -m 25 -q 1 "$ip" 2>&1)
    if echo "$res" | grep -q "59.43."; then line="CN2 GIA/GT (极速)"
    elif echo "$res" | grep -q "223.120."; then line="CMI 直连 (优秀)"
    elif echo "$res" | grep -qE "218.105.|210.13."; then line="AS9929/4837 (优化)"
    elif echo "$res" | grep -qE "202.97.|219.158."; then line="普通 163/169 (一般)"
    else line="普通/绕路"; fi
    summary[$isp]="$line | $ping_val"
done

printf "%-10s | %-20s | %-10s\n" "运营商" "线路类型/质量" "延迟"
echo "-------------------------------------------------------"
for isp in "中国电信" "中国联通" "中国移动"; do
    IFS='|' read -r l p <<< "${summary[$isp]}"
    printf "%-10s | %-20s | %-10s\n" "$isp" "$l" "$p"
done
echo "======================================================="