#!/bin/bash

# --- 這裡要改成你真正有開的 Port ---
TARGET_IP="125.229.110.50"
# PORTS=("51433") 
PORTS=("51433" "31433")

echo "--- [第一步：身份確認] ---"
MY_INFO=$(curl -s https://ip.lotimmy.com/json)
MY_IP=$(echo $MY_INFO | jq -r '.ip')
MY_REGION=$(echo $MY_INFO | jq -r '.region_name')
MY_ASN=$(echo $MY_INFO | jq -r '.asn_org')

echo "目前位置：$MY_REGION ($MY_ASN)"
echo "對外 IP ：$MY_IP"

# 判斷是否為台灣 IP
SHOULD_PASS=false
if [[ "$MY_REGION" == *"Taipei"* ]] || [[ "$MY_ASN" == *"Data Communication"* ]]; then
    SHOULD_PASS=true
fi

echo -e "\n--- [第二步：連線測試] ---"
for PORT in "${PORTS[@]}"
do
    # 測試連線
    nc -zv -w 5 $TARGET_IP $PORT > /dev/null 2>&1
    if [ $? -eq 0 ]; then
        echo "[成功] Port $PORT 連線正常。"
    else
        echo -n "[攔截] Port $PORT 無法連線。"
        [ "$SHOULD_PASS" = true ] && echo " (錯誤：你是台灣 IP 卻被擋掉！)" || echo ""
    fi
done