@echo off
:: civpb.com — lets two players be in the Pitboss game at the same time.
:: Points the dead GameSpy "NAT negotiation" hostnames at civpb.com, which
:: brokers (and relays) the direct connection between two players.
:: Run as administrator. Safe to run twice. Remove: delete the civpb lines
:: from C:\Windows\System32\drivers\etc\hosts
set HOSTS=%SystemRoot%\System32\drivers\etc\hosts
net session >nul 2>&1
if %errorlevel% neq 0 (
  echo Please right-click this file and choose "Run as administrator".
  pause
  exit /b 1
)
copy /y "%HOSTS%" "%HOSTS%.civpb-backup" >nul
:: Windows uses the FIRST matching hosts line, so any older natneg entries
:: (e.g. from a lobby hosts file) must go, or ours would never be used.
findstr /v /i /c:"natneg" /c:"civpb natneg" "%HOSTS%" > "%TEMP%\hosts.civpb"
copy /y "%TEMP%\hosts.civpb" "%HOSTS%" >nul
(
  echo.
  echo # civpb natneg — Civ4 connection broker, see https://civpb.com
  echo 46.224.21.154 natneg1.gamespy.com
  echo 46.224.21.154 natneg2.gamespy.com
  echo 46.224.21.154 natneg3.gamespy.com
  echo 46.224.21.154 civ4bts.natneg1.gamespy.com
  echo 46.224.21.154 civ4bts.natneg2.gamespy.com
  echo 46.224.21.154 civ4bts.natneg3.gamespy.com
  echo 46.224.21.154 civ4.natneg1.gamespy.com
  echo 46.224.21.154 civ4.natneg2.gamespy.com
  echo 46.224.21.154 civ4.natneg3.gamespy.com
) >> "%HOSTS%"
ipconfig /flushdns >nul
echo Done. civpb.com now brokers your connections to other players.
echo (Previous hosts file saved as hosts.civpb-backup; other lobby entries were kept.)
pause