#!/bin/bash
# 诊断：为什么 /etc/hosts 覆盖没生效，隧道还是落到 lax
set -u

echo "===== 1. /etc/hosts 实际内容（尾部）====="
tail -8 /etc/hosts | sed 's/^/  /'

echo
echo "===== 2. nsswitch 的解析顺序 ====="
grep '^hosts' /etc/nsswitch.conf | sed 's/^/  /'

echo
echo "===== 3. glibc 解析（getent）====="
getent ahostsv4 region1.v2.argotunnel.com 2>/dev/null | head -3 | sed 's/^/  v4: /'
getent ahostsv6 region1.v2.argotunnel.com 2>/dev/null | head -3 | sed 's/^/  v6: /'

echo
echo "===== 4. 设备有没有全局 IPv6 地址 ====="
ip -6 addr show scope global 2>/dev/null | grep -E 'inet6' | head -4 | sed 's/^/  /' \
    || echo "  （没有全局 IPv6）"
ip -6 route show default 2>/dev/null | head -2 | sed 's/^/  默认路由: /' \
    || echo "  （没有 IPv6 默认路由）"

echo
echo "===== 5. cloudflared 支持哪些 edge 相关参数 ====="
cloudflared tunnel --help 2>&1 | grep -iE 'edge|region|protocol|ip-version' | head -12 | sed 's/^/  /'
echo
echo "  --- run 子命令的 ---"
cloudflared tunnel run --help 2>&1 | grep -iE 'edge|region|protocol|ip-version' | head -12 | sed 's/^/  /'

echo
echo "===== 6. 当前隧道服务实际用的参数 ====="
grep -o 'ExecStart=.*' /etc/systemd/system/lanremote-tunnel.service | head -1 | sed 's/^/  /'

echo
echo "===== 7. cloudflared 近期的连接日志 ====="
grep -E 'location=|edge discovery|Initial protocol' /root/lanremote-relay/tunnel.log 2>/dev/null \
    | tail -6 | sed 's/^/  /'