Oppdatert til mer stabil versjon.
This commit is contained in:
Anders Knutsen
parent
f51134e2ff
commit
a2ddc7cc1c
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@ -2,8 +2,8 @@
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Et Python-basert verktøy som splitter innkommende TCP-trafikk til flere mål samtidig.
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## Start
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Kjør `tcp_splitter.py` for å starte programmet.
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Scriptet `worker.py` blir startet automatisk av hovedscriptet, og restartes med jevne mellomrom basert på verdien satt i `config.json`.
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Kjør `worker.exe` for å starte programmet.
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Scriptet `tcp_splitter.exe` blir startet automatisk av hovedscriptet, og restartes med jevne mellomrom basert på verdien satt i `config.json`.
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---
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Binary file not shown.
312
tcp_splitter.py
312
tcp_splitter.py
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@ -1,26 +1,300 @@
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import subprocess
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import time
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#!/usr/bin/env python3
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# tcp_splitter.py
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import argparse
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import asyncio
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import json
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import logging
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import signal
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import socket
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import sys
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import os
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import ctypes
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from dataclasses import dataclass
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from pathlib import Path
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from typing import Callable, Awaitable, List, Optional
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while True:
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# Get the current time and print it when starting the process
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restart_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
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print(f"Starting worker script at {restart_time}")
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BUF_SIZE = 64 * 1024
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DEFAULT_MIRROR_BUF = 1 * 1024 * 1024 # 1 MiB
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# Start the worker script in a new Command Prompt window with a custom title
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process = subprocess.Popen(['start', 'cmd', '/c', 'title TCP_SPLITTER && worker.exe'], shell=True)
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def set_console_title(title: Optional[str]):
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if os.name == "nt" and title:
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try:
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ctypes.windll.kernel32.SetConsoleTitleW(str(title))
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except Exception:
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pass
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# Wait a moment to allow the process to start
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time.sleep(2)
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def set_socket_opts(writer: asyncio.StreamWriter) -> None:
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sock = writer.get_extra_info("socket")
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if not sock:
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return
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for opt in (
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(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1),
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(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
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):
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try: sock.setsockopt(*opt)
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except Exception: pass
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@dataclass
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class Target:
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host: str
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port: int
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@dataclass
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class Config:
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listen_host: str
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listen_port: int
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primary: Target
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backups: List[Target]
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run_duration: int
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log_level: int
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mirror_buffer_bytes: int = DEFAULT_MIRROR_BUF
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idle_timeout: float = 0.0
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def _level_from_name(name: str) -> int:
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try:
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lvl = getattr(logging, str(name).upper())
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return lvl if isinstance(lvl, int) else logging.INFO
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except Exception:
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return logging.INFO
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def resolve_default_config_path() -> Path:
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base = Path(sys.executable).parent if getattr(sys, "frozen", False) else Path(__file__).resolve().parent
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cfg = base / "config.json"
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return cfg if cfg.exists() else Path.cwd() / "config.json"
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def load_config(path: Path) -> Config:
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if not path.exists():
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raise FileNotFoundError(f"Config not found: {path}")
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raw = json.loads(path.read_text(encoding="utf-8"))
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targets = raw["target_hosts"]
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if not isinstance(targets, list) or not targets:
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raise ValueError("config.target_hosts must contain at least one entry")
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primary = Target(str(targets[0]["host"]), int(targets[0]["port"]))
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backups = [Target(str(t["host"]), int(t["port"])) for t in targets[1:]]
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return Config(
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listen_host=str(raw["listen_host"]),
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listen_port=int(raw["listen_port"]),
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primary=primary,
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backups=backups,
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run_duration=int(raw.get("run_duration", 0) or 0),
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log_level=_level_from_name(raw.get("log_level", "INFO")),
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mirror_buffer_bytes=int(raw.get("mirror_buffer_bytes", DEFAULT_MIRROR_BUF)),
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idle_timeout=float(raw.get("idle_timeout", 0.0)),
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)
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class MirrorBuffer:
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def __init__(self, max_bytes: int):
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self._q: asyncio.Queue[bytes] = asyncio.Queue()
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self._bytes = 0
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self._max = max_bytes
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self._closed = False
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self._lock = asyncio.Lock()
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@property
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def closed(self) -> bool: return self._closed
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async def close(self):
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async with self._lock:
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self._closed = True
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while not self._q.empty():
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try:
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self._q.get_nowait(); self._q.task_done()
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except Exception: break
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async def put_nowait(self, data: bytes):
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if self._closed: return
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async with self._lock:
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new_total = self._bytes + len(data)
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if new_total > self._max:
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raise asyncio.QueueFull()
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self._bytes = new_total
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self._q.put_nowait(data)
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async def get(self) -> bytes:
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data = await self._q.get()
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async with self._lock:
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self._bytes -= len(data)
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self._q.task_done()
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return data
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def empty(self) -> bool: return self._q.empty()
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@dataclass
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class MirrorCtl:
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name: str
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buf: MirrorBuffer
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disable: Callable[[], Awaitable[None]]
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active: bool = True
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async def pump(reader: asyncio.StreamReader, writer: asyncio.StreamWriter, *,
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label: str, idle_timeout: float = 0.0,
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mirrors: Optional[List[MirrorCtl]] = None):
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set_socket_opts(writer)
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while True:
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# Check if the specific titled process is still running
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result = subprocess.run('tasklist /v | findstr "TCP_SPLITTER"', shell=True, stdout=subprocess.PIPE, text=True)
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try:
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data = await (asyncio.wait_for(reader.read(BUF_SIZE), timeout=idle_timeout) if idle_timeout > 0 else reader.read(BUF_SIZE))
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except asyncio.TimeoutError:
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logging.info("%s: idle timeout; closing direction", label); break
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if not data: break
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writer.write(data)
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try: await writer.drain()
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except ConnectionError:
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logging.info("%s: downstream closed; stopping", label); break
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if mirrors:
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for m in mirrors:
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if not m.active or m.buf.closed: continue
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try: await m.buf.put_nowait(data)
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except asyncio.QueueFull:
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m.active = False
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logging.warning("%s: mirror '%s' overflow -> disabling", label, m.name)
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try: await m.disable()
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except Exception: pass
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# If "TCP_SPLITTER" title is not found, the worker script has stopped
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if "TCP_SPLITTER" not in result.stdout:
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exit_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
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print(f"Worker script exited at {exit_time}. Restarting...")
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break # Exit the inner loop to restart the outer loop and launch the script again
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async def mirror_writer_task(name: str, writer: asyncio.StreamWriter, mbuf: MirrorBuffer):
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set_socket_opts(writer)
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try:
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while not mbuf.closed:
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if mbuf.empty() and mbuf.closed: break
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data = await mbuf.get()
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if not data: continue
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writer.write(data)
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try: await writer.drain()
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except ConnectionError:
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logging.info("backup '%s': writer closed", name); break
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except asyncio.CancelledError:
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pass
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finally:
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try: writer.close(); await writer.wait_closed()
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except Exception: pass
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# Check every second if the script is still running
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time.sleep(1)
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async def discard_task(name: str, reader: asyncio.StreamReader):
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try:
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while True:
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if not await reader.read(BUF_SIZE): break
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logging.debug("backup '%s': discard exception: %r", name, e)
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async def handle_client(client_reader: asyncio.StreamReader, client_writer: asyncio.StreamWriter, cfg: Config):
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peer = client_writer.get_extra_info("peername")
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conn_id = f"{peer[0]}:{peer[1]}" if isinstance(peer, tuple) else "unknown"
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logging.info("[%s] accepted", conn_id)
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set_socket_opts(client_writer)
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try:
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p_reader, p_writer = await asyncio.open_connection(cfg.primary.host, cfg.primary.port)
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set_socket_opts(p_writer)
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logging.debug("[%s] connected primary %s:%d", conn_id, cfg.primary.host, cfg.primary.port)
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except Exception as e:
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logging.error("[%s] failed to connect primary %s:%d: %s", conn_id, cfg.primary.host, cfg.primary.port, e)
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client_writer.close(); await client_writer.wait_closed(); return
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mirror_ctls: List[MirrorCtl] = []
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mirror_tasks: List[asyncio.Task] = []
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async def mk_disable(w: Optional[asyncio.StreamWriter], buf: MirrorBuffer):
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async def _disable():
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try: await buf.close()
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except Exception: pass
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if w:
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try: w.close(); await w.wait_closed()
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except Exception: pass
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return _disable
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for tgt in cfg.backups:
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name = f"{tgt.host}:{tgt.port}"
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try:
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b_reader, b_writer = await asyncio.open_connection(tgt.host, tgt.port)
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set_socket_opts(b_writer)
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mbuf = MirrorBuffer(cfg.mirror_buffer_bytes)
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disable_cb = await mk_disable(b_writer, mbuf)
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ctl = MirrorCtl(name=name, buf=mbuf, disable=disable_cb, active=True)
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mirror_ctls.append(ctl)
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mirror_tasks += [
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asyncio.create_task(mirror_writer_task(name, b_writer, mbuf)),
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asyncio.create_task(discard_task(name, b_reader)),
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]
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logging.debug("[%s] connected backup %s", conn_id, name)
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except Exception as e:
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logging.warning("[%s] cannot connect backup %s: %s (disabled)", conn_id, name, e)
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c2p = asyncio.create_task(pump(client_reader, p_writer, label=f"[{conn_id}] client->primary",
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idle_timeout=cfg.idle_timeout, mirrors=mirror_ctls))
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p2c = asyncio.create_task(pump(p_reader, client_writer, label=f"[{conn_id}] primary->client",
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idle_timeout=cfg.idle_timeout))
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try:
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await asyncio.wait([c2p, p2c], return_when=asyncio.FIRST_COMPLETED)
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finally:
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for obj in (p_writer, client_writer):
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try: obj.close(); await obj.wait_closed()
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except Exception: pass
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for ctl in mirror_ctls:
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try: await ctl.disable()
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except Exception: pass
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for t in mirror_tasks + [c2p, p2c]:
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if not t.done(): t.cancel()
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for t in mirror_tasks + [c2p, p2c]:
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try: await t
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except Exception: pass
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logging.info("[%s] closed", conn_id)
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async def run_server(cfg: Config):
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server = await asyncio.start_server(
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lambda r, w: handle_client(r, w, cfg),
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host=cfg.listen_host,
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port=cfg.listen_port,
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start_serving=True,
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)
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sockets = ", ".join(str(s.getsockname()) for s in (server.sockets or []))
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logging.info("Listening on %s | primary=%s:%d | backups=%s | mirror_buffer=%d",
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sockets, cfg.primary.host, cfg.primary.port,
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",".join(f"{b.host}:{b.port}" for b in cfg.backups) or "none",
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cfg.mirror_buffer_bytes)
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stop_event = asyncio.Event()
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def _signal_stop():
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logging.info("Shutdown requested…")
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stop_event.set()
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loop = asyncio.get_running_loop()
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for sig in (signal.SIGINT, signal.SIGTERM):
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try:
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loop.add_signal_handler(sig, _signal_stop)
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except NotImplementedError:
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pass # Windows quirk
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# Make TASKS (not bare coroutines)
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stop_task = asyncio.create_task(stop_event.wait())
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duration_task = (asyncio.create_task(asyncio.sleep(cfg.run_duration))
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if cfg.run_duration and cfg.run_duration > 0 else None)
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async with server:
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tasks = [stop_task] + ([duration_task] if duration_task else [])
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done, pending = await asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)
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# Cancel whatever is left
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for t in pending:
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t.cancel()
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await asyncio.gather(*pending, return_exceptions=True)
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server.close()
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await server.wait_closed()
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logging.info("Server stopped.")
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def main():
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ap = argparse.ArgumentParser(description="Asyncio TCP splitter with mirrored backups (config-driven).")
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ap.add_argument("--config", help="Path to JSON config file.")
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ap.add_argument("--title", help="Console window title (Windows).")
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args = ap.parse_args()
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cfg_path = Path(args.config) if args.config else resolve_default_config_path()
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cfg = load_config(cfg_path)
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logging.basicConfig(level=cfg.log_level, format="%(asctime)s %(levelname)s %(message)s")
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logging.info("Using config: %s", cfg_path)
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set_console_title(args.title)
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try:
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asyncio.run(run_server(cfg))
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except KeyboardInterrupt:
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pass
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if __name__ == "__main__":
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main()
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Binary file not shown.
192
worker.py
192
worker.py
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@ -1,162 +1,56 @@
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import socket
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import threading
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import json
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#!/usr/bin/env python3
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# worker.py
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import subprocess
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import time
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import logging
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from datetime import datetime
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from crccheck.crc import CrcArc
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import sys
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from pathlib import Path
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# Load configuration from config.json
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with open('config.json', 'r') as config_file:
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config = json.load(config_file)
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TITLE = "TCP_SPLITTER"
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SPLITTER_EXE_NAME = "tcp_splitter.exe"
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CONFIG_NAME = "config.json"
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# Configuration from config.json
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LISTEN_HOST = config['listen_host']
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LISTEN_PORT = config['listen_port']
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TARGET_HOSTS = config['target_hosts']
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RUN_DURATION = config['run_duration']
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LOG_LEVEL = config['log_level']
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# Windows creation flag: create child in a new console window
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CREATE_NEW_CONSOLE = 0x00000010
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# Map log level strings to logging module constants
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log_level_mapping = {
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"DEBUG": logging.DEBUG,
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"INFO": logging.INFO,
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"WARNING": logging.WARNING,
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"ERROR": logging.ERROR,
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"CRITICAL": logging.CRITICAL
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}
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def base_dir() -> Path:
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# When frozen by PyInstaller, sys.executable is the EXE path
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return Path(sys.executable).parent if getattr(sys, "frozen", False) else Path(__file__).resolve().parent
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# Validate and set the log level
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if LOG_LEVEL not in log_level_mapping:
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raise ValueError(f"Invalid log level: {LOG_LEVEL}. Valid options are: {list(log_level_mapping.keys())}")
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def launch() -> subprocess.Popen:
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base = base_dir()
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splitter = base / SPLITTER_EXE_NAME
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cfg = base / CONFIG_NAME
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# Logging configuration
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logging.basicConfig(
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level=log_level_mapping[LOG_LEVEL],
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format='%(asctime)s - %(levelname)s - %(message)s',
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handlers=[
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logging.FileHandler('relay_server.log', encoding='utf-8'), # Log to a file
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logging.StreamHandler() # Log to the console
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]
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)
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logger = logging.getLogger(__name__)
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if not splitter.exists():
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raise FileNotFoundError(f"Cannot find {splitter}")
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if not cfg.exists():
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raise FileNotFoundError(f"Cannot find {cfg}")
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def relay_to_server(server_host, server_port, data):
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"""Relay data to a server and return the response."""
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# Launch tcp_splitter.exe with its own console and a readable title
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args = [str(splitter), "--config", str(cfg), "--title", TITLE]
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proc = subprocess.Popen(args, creationflags=CREATE_NEW_CONSOLE)
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return proc
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def main():
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while True:
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start_ts = time.strftime("%Y-%m-%d %H:%M:%S")
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print(f"[worker] Starting splitter at {start_ts}")
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try:
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with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as server_socket:
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server_socket.connect((server_host, server_port))
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server_socket.sendall(data)
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response = server_socket.recv(4096)
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return response
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proc = launch()
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except Exception as e:
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logger.error(f"Failed to relay data to {server_host}:{server_port}: {e}")
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return None
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def calculate_crc(data):
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"""Calculate CRC using CrcArc."""
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crc = CrcArc.calc(data.encode()) # Encode data to bytes
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crc_hex = hex(crc).split('x')[1].upper().zfill(4) # Format as uppercase hex (4 chars)
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return crc_hex
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def calculate_length(data):
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"""Calculate the length of the data in hexadecimal."""
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length = len(data.encode()) # Length in bytes
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length_hex = hex(length)[2:].upper().zfill(4) # Convert to hex, ensure 4 digits
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return length_hex
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def handle_client(client_socket, client_address):
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"""Handle a client connection."""
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try:
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# Receive data from the client
|
||||
data = client_socket.recv(4096)
|
||||
if not data:
|
||||
logger.warning(f"No data received from {client_address}")
|
||||
return
|
||||
|
||||
logger.debug(f"Received data from {client_address}: {data}")
|
||||
|
||||
# Decode the data and check for NULL message
|
||||
plain_data = data.decode("utf-8", errors='ignore')
|
||||
# Validate message integrity
|
||||
if not "SIA-DCS" in plain_data or not "ADM-CID" in plain_data:
|
||||
return
|
||||
if '"NULL"' in plain_data:
|
||||
logger.debug("NULL Message detected, sending ACK without relaying signal!")
|
||||
orig_text = plain_data[15:].strip()
|
||||
ack_text = '"ACK"' + orig_text
|
||||
ack_text_bytes = ack_text.encode()
|
||||
logger.debug(f"ACK Message: {ack_text}")
|
||||
|
||||
# Calculate CRC and format it
|
||||
crc = CrcArc.calc(ack_text_bytes)
|
||||
crcstr = str(hex(crc)).split('x')
|
||||
crcstr = str(crcstr[1].upper())
|
||||
if len(crcstr) == 2:
|
||||
crcstr = '00' + crcstr
|
||||
if len(crcstr) == 3:
|
||||
crcstr = '0' + crcstr
|
||||
|
||||
# Calculate length and format it
|
||||
length = str(hex(len(ack_text_bytes))).split('x')
|
||||
logger.debug(f"CRC & Length: {crcstr}, 00{length[1]}")
|
||||
# Construct the ACK message
|
||||
ack_msg = '\n' + crcstr + '00' + length[1].upper() + ack_text + '\r'
|
||||
|
||||
# Send the ACK response
|
||||
ack_bytes = bytes(ack_msg, 'ASCII')
|
||||
client_socket.sendall(ack_bytes)
|
||||
logger.debug(f"Response sent to client: {ack_msg.strip()}")
|
||||
return
|
||||
|
||||
# Relay the data to all target hosts
|
||||
responses = []
|
||||
for target in TARGET_HOSTS:
|
||||
logger.info(f"Relaying data to {target['host']}:{target['port']}")
|
||||
response = relay_to_server(target['host'], target['port'], data)
|
||||
if response:
|
||||
responses.append(response)
|
||||
logger.debug(f"Received response from {target['host']}:{target['port']}: {response}")
|
||||
|
||||
# Send only the first server's response back to the client
|
||||
if responses:
|
||||
client_socket.sendall(responses[0])
|
||||
logger.info(f"Sent response to {client_address}: {responses[0]}")
|
||||
else:
|
||||
logger.warning(f"No responses received from target hosts for {client_address}")
|
||||
|
||||
except Exception as e:
|
||||
logger.error(f"Error handling client {client_address}: {e}")
|
||||
finally:
|
||||
client_socket.close()
|
||||
logger.debug(f"Closed connection with {client_address}")
|
||||
|
||||
def start_relay():
|
||||
"""Start the TCP relay server."""
|
||||
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as server_socket:
|
||||
server_socket.bind((LISTEN_HOST, LISTEN_PORT))
|
||||
server_socket.listen(5)
|
||||
logger.info(f"Relay server started listening on {LISTEN_HOST}:{LISTEN_PORT}")
|
||||
|
||||
# Set a timer to stop the server after RUN_DURATION seconds
|
||||
stop_time = time.time() + RUN_DURATION
|
||||
logger.debug(f"Server will run for {RUN_DURATION} seconds.")
|
||||
|
||||
while time.time() < stop_time:
|
||||
try:
|
||||
# Set a timeout to periodically check if the run duration has elapsed
|
||||
server_socket.settimeout(1)
|
||||
client_socket, client_address = server_socket.accept()
|
||||
logger.debug(f"Accepted connection from {client_address}")
|
||||
client_thread = threading.Thread(target=handle_client, args=(client_socket, client_address))
|
||||
client_thread.start()
|
||||
except socket.timeout:
|
||||
print(f"[worker] Launch error: {e}")
|
||||
time.sleep(3)
|
||||
continue
|
||||
except Exception as e:
|
||||
logger.error(f"Error accepting connection: {e}")
|
||||
|
||||
logger.info("Server run duration elapsed. Shutting down.")
|
||||
# Poll until it exits; restart on exit
|
||||
while True:
|
||||
rc = proc.poll()
|
||||
if rc is not None:
|
||||
end_ts = time.strftime("%Y-%m-%d %H:%M:%S")
|
||||
print(f"[worker] Splitter exited (code {rc}) at {end_ts}. Restarting…")
|
||||
time.sleep(1)
|
||||
break
|
||||
time.sleep(1)
|
||||
|
||||
if __name__ == "__main__":
|
||||
start_relay()
|
||||
main()
|
||||
|
|
|
|||
Loading…
Reference in New Issue