8ffde94d48
- _is_same_network: /16 subnet comparison catches NordVPN IP rotation (exit_ip != real_ip exact-match missed same-VPN exits on rotated IPs) - Leak now blacklists the entire dead chain, not just rotate - GOST stderr/stdout -> gost.log (file, never deadlocks vs pipe) with 512KB rotation; last 8 lines shown in UI when GOST dies - read_gost_log_tail helper for live debugging - Health check uses same subnet check for consistency - 5 new subnet tests Made-with: Cursor
130 lines
4.1 KiB
Python
130 lines
4.1 KiB
Python
from __future__ import annotations
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import io
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import logging
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import shutil
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import subprocess
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import zipfile
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from pathlib import Path
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from typing import Any
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import httpx
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from .paths import app_data_dir, gost_exe_path
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log = logging.getLogger(__name__)
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GOST_RELEASE_ZIP = (
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"https://github.com/go-gost/gost/releases/download/v3.2.6/"
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"gost_3.2.6_windows_amd64.zip"
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)
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def _add_defender_exclusion(path: Path) -> None:
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"""Add Windows Defender exclusion so GOST is not quarantined."""
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try:
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# ExclusionPath covers gost.exe under this folder; avoid invalid combined params on older builds.
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folder = str(path.parent).replace("'", "''")
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subprocess.run(
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[
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"powershell", "-NoProfile", "-NonInteractive", "-Command",
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f"Add-MpPreference -ExclusionPath '{folder}' -ErrorAction SilentlyContinue",
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],
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capture_output=True,
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timeout=30,
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creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),
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)
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log.info("Defender exclusion added for %s", path.parent)
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except Exception:
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pass # non-fatal
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def ensure_gost(target: Path | None = None) -> Path:
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exe = target or gost_exe_path()
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if exe.is_file() and exe.stat().st_size > 10_000:
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return exe
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exe.parent.mkdir(parents=True, exist_ok=True)
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# Add exclusion BEFORE downloading so Defender doesn't nuke it on write
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_add_defender_exclusion(exe)
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log.info("Downloading GOST %s", GOST_RELEASE_ZIP)
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with httpx.Client(timeout=120.0, follow_redirects=True) as c:
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r = c.get(GOST_RELEASE_ZIP)
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r.raise_for_status()
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data = r.content
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if len(data) < 64 or data[:2] != b"PK":
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raise RuntimeError("Downloaded GOST zip looks invalid (not a zip).")
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with zipfile.ZipFile(io.BytesIO(data), "r") as z:
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names = [n for n in z.namelist() if n.lower().endswith("gost.exe")]
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if not names:
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raise RuntimeError("gost.exe not found in release zip")
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with z.open(names[0]) as src, open(exe, "wb") as dst:
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shutil.copyfileobj(src, dst)
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# Add exclusion again after write in case Defender scanned during extraction
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_add_defender_exclusion(exe)
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log.info("GOST installed at %s", exe)
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return exe
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def build_gost_cmd(gost: Path, listen_http: str, forwards: list[str]) -> list[str]:
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args = [str(gost), "-L", f"http://{listen_http}"]
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for f in forwards:
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args.extend(["-F", f])
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return args
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def gost_log_path() -> Path:
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return app_data_dir() / "gost.log"
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def popen_no_window(args: list[str]) -> subprocess.Popen:
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# stderr → rolling log file (not a pipe — pipes deadlock if unread; files never block).
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# stdout is also captured to the same file since GOST v3 mixes output channels.
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cr = getattr(subprocess, "CREATE_NO_WINDOW", 0)
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log_path = gost_log_path()
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try:
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_rotate_gost_log(log_path)
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stderr_dest: Any = open(log_path, "ab") # noqa: WPS515 — intentional long-lived file handle
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except OSError:
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stderr_dest = subprocess.DEVNULL
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return subprocess.Popen(
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args,
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stdin=subprocess.DEVNULL,
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stdout=stderr_dest,
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stderr=stderr_dest,
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creationflags=cr,
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)
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def _rotate_gost_log(path: Path, max_bytes: int = 512 * 1024) -> None:
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"""Keep gost.log under max_bytes by truncating the oldest half when it grows too large."""
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try:
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if path.is_file() and path.stat().st_size > max_bytes:
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data = path.read_bytes()
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path.write_bytes(data[len(data) // 2:])
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except OSError:
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pass
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def read_gost_log_tail(lines: int = 40) -> str:
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"""Return the last N lines of gost.log for display in the UI."""
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try:
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text = gost_log_path().read_text(encoding="utf-8", errors="replace")
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return "\n".join(text.splitlines()[-lines:])
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except OSError:
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return "(gost.log not found)"
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def terminate_process(proc: subprocess.Popen | None) -> None:
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if proc is None:
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return
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if proc.poll() is not None:
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return
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try:
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proc.terminate()
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proc.wait(timeout=5)
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except Exception:
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try:
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proc.kill()
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except Exception:
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pass
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