mirror of
https://github.com/okhsunrog/vpnhide.git
synced 2026-04-28 06:31:27 +00:00
a0bec24576
`c` iterates one character at a time over the test name string; a single character is never the empty string, so the disjunct was always False. The remaining `0x20 <= ord(c) < 0x7F` already correctly rejects non-ASCII names, so behaviour is unchanged.
578 lines
20 KiB
Python
Executable file
578 lines
20 KiB
Python
Executable file
#!/usr/bin/env python3
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"""Render the four iface-list matchers + their unit tests from
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data/interfaces.toml.
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Generates one match function per target (kmod C, zygisk Rust,
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lsposed/native Rust, lsposed Kotlin) so all four platforms agree on
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which interface names are VPN tunnels, plus per-language test files
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seeded from the same [[test]] vectors so CI catches drift instantly.
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Re-run after editing data/interfaces.toml and commit the regenerated
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files. CI's lint job re-runs the codegen and fails on drift.
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Stdlib only: tomllib (Python 3.11+) is the only non-builtin import,
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and that's stdlib too.
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"""
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from __future__ import annotations
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import sys
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import tomllib
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from pathlib import Path
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from typing import Any
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REPO_ROOT = Path(__file__).resolve().parent.parent
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TOML_PATH = REPO_ROOT / "data" / "interfaces.toml"
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# Output paths — kept next to the code that consumes them so include /
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# import paths stay short and obvious.
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OUT_KMOD = REPO_ROOT / "kmod" / "generated" / "iface_lists.h"
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OUT_KMOD_TEST = REPO_ROOT / "kmod" / "test_iface_lists.c"
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OUT_ZYGISK = REPO_ROOT / "zygisk" / "src" / "generated" / "iface_lists.rs"
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OUT_LSP_NATIVE = REPO_ROOT / "lsposed" / "native" / "src" / "generated" / "iface_lists.rs"
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OUT_LSP_KT = (
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REPO_ROOT
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/ "lsposed"
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/ "app"
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/ "src"
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/ "main"
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/ "kotlin"
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/ "dev"
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/ "okhsunrog"
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/ "vpnhide"
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/ "generated"
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/ "IfaceLists.kt"
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)
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OUT_LSP_KT_TEST = (
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REPO_ROOT
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/ "lsposed"
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/ "app"
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/ "src"
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/ "test"
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/ "kotlin"
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/ "dev"
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/ "okhsunrog"
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/ "vpnhide"
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/ "generated"
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/ "IfaceListsGeneratedTest.kt"
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)
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GENERATED_HEADER_LINE = (
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"AUTO-GENERATED from data/interfaces.toml — do not edit by hand. "
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"Regenerate with: python3 scripts/codegen-interfaces.py"
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)
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# ---------------------------------------------------------------------------
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# rule normalization
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# ---------------------------------------------------------------------------
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VALID_KINDS = ("exact", "prefix", "prefix_digits", "contains")
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class Rule:
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"""One match rule from the toml, normalized to a known kind.
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kind ∈ VALID_KINDS.
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needle is the literal string (already lowercased — all targets
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fold case at match time).
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note is the human comment from the toml, copied into the
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generated source so reviewers see why each rule is there.
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"""
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__slots__ = ("kind", "needle", "note")
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def __init__(self, kind: str, needle: str, note: str) -> None:
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self.kind = kind
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self.needle = needle
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self.note = note
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class TestVector:
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__slots__ = ("name", "is_vpn")
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def __init__(self, name: str, is_vpn: bool) -> None:
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self.name = name
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self.is_vpn = is_vpn
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def parse_rule(entry: dict[str, Any]) -> Rule:
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match = entry.get("match")
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if not isinstance(match, dict):
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raise SystemExit(f"entry missing or malformed `match`: {entry!r}")
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note = str(entry.get("note", "")).strip()
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keys = set(match.keys())
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if keys == {"exact"}:
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needle = str(match["exact"])
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kind = "exact"
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elif keys == {"prefix"}:
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needle = str(match["prefix"])
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kind = "prefix"
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elif keys == {"prefix", "suffix"}:
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suffix = str(match["suffix"])
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if suffix == "digits":
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kind = "prefix_digits"
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else:
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raise SystemExit(f"unsupported suffix {suffix!r}; expected digits")
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needle = str(match["prefix"])
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elif keys == {"contains"}:
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needle = str(match["contains"])
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kind = "contains"
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else:
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raise SystemExit(f"unsupported match shape {keys!r} in entry {entry!r}")
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if not needle:
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raise SystemExit(f"empty needle in entry {entry!r}")
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if not all(0x20 <= ord(c) < 0x7F for c in needle):
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raise SystemExit(f"non-ASCII needle {needle!r} in entry {entry!r}")
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return Rule(kind, needle.lower(), note)
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def parse_test(entry: dict[str, Any]) -> TestVector:
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if "name" not in entry or "is_vpn" not in entry:
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raise SystemExit(f"[[test]] entry needs name and is_vpn: {entry!r}")
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name = str(entry["name"])
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if not all(0x20 <= ord(c) < 0x7F for c in name):
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raise SystemExit(f"non-ASCII test name {name!r}; the matcher itself is ASCII-only")
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return TestVector(name=name, is_vpn=bool(entry["is_vpn"]))
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def load() -> tuple[list[Rule], list[TestVector]]:
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with TOML_PATH.open("rb") as f:
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data = tomllib.load(f)
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raw_rules = data.get("vpn") or []
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if not isinstance(raw_rules, list) or not raw_rules:
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raise SystemExit(f"{TOML_PATH}: missing or empty [[vpn]] table")
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rules = [parse_rule(e) for e in raw_rules]
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tests = [parse_test(e) for e in (data.get("test") or [])]
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return rules, tests
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# ---------------------------------------------------------------------------
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# escape helpers
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# ---------------------------------------------------------------------------
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def c_str_lit(s: str) -> str:
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out = ['"']
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for c in s:
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if c == '"':
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out.append('\\"')
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elif c == "\\":
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out.append("\\\\")
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elif 0x20 <= ord(c) < 0x7F:
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out.append(c)
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else:
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out.append(f"\\x{ord(c):02x}")
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out.append('"')
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return "".join(out)
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def rust_byte_lit(s: str) -> str:
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# Use byte-string with escapes so non-printable / quotes survive.
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out = ['b"']
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for c in s:
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if c == '"':
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out.append('\\"')
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elif c == "\\":
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out.append("\\\\")
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elif 0x20 <= ord(c) < 0x7F:
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out.append(c)
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else:
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out.append(f"\\x{ord(c):02x}")
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out.append('"')
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return "".join(out)
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def kt_str_lit(s: str) -> str:
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out = ['"']
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for c in s:
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if c == '"':
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out.append('\\"')
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elif c == "\\":
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out.append("\\\\")
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elif c == "$":
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out.append("\\$")
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elif 0x20 <= ord(c) < 0x7F:
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out.append(c)
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else:
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out.append(f"\\u{ord(c):04x}")
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out.append('"')
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return "".join(out)
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# ---------------------------------------------------------------------------
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# C emitter (kmod)
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# ---------------------------------------------------------------------------
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def emit_kmod(rules: list[Rule]) -> str:
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"""Render an inline header for the kernel module.
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Header is dual-target: builds in kernel (default) AND in userspace
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when __VPNHIDE_HOST_TEST is defined, so test_iface_lists.c can link
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the same matcher.
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"""
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lines: list[str] = []
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lines.append(f"/* {GENERATED_HEADER_LINE} */")
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lines.append("#ifndef VPNHIDE_GENERATED_IFACE_LISTS_H")
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lines.append("#define VPNHIDE_GENERATED_IFACE_LISTS_H")
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lines.append("")
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lines.append("#ifdef __KERNEL__")
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lines.append("# include <linux/string.h>")
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lines.append("# include <linux/ctype.h>")
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lines.append("# include <linux/types.h>")
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lines.append("#else")
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lines.append("# include <ctype.h>")
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lines.append("# include <stdbool.h>")
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lines.append("# include <stddef.h>")
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lines.append("# include <string.h>")
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lines.append("#endif")
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lines.append("")
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lines.append("static inline bool vpnhide_iface_starts_with_ci(")
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lines.append("\tconst char *name, const char *prefix)")
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lines.append("{")
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lines.append("\tsize_t i;")
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lines.append("\tfor (i = 0; prefix[i]; i++) {")
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lines.append("\t\tif (!name[i])")
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lines.append("\t\t\treturn false;")
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lines.append("\t\tif (tolower((unsigned char)name[i]) !=")
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lines.append("\t\t (unsigned char)prefix[i])")
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lines.append("\t\t\treturn false;")
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lines.append("\t}")
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lines.append("\treturn true;")
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lines.append("}")
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lines.append("")
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lines.append("static inline bool vpnhide_iface_starts_with_then_digits_ci(")
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lines.append("\tconst char *name, const char *prefix)")
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lines.append("{")
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lines.append("\tsize_t i;")
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lines.append("\tif (!vpnhide_iface_starts_with_ci(name, prefix))")
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lines.append("\t\treturn false;")
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lines.append("\ti = strlen(prefix);")
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lines.append("\tif (!name[i])")
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lines.append("\t\treturn false;")
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lines.append("\tfor (; name[i]; i++)")
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lines.append("\t\tif (name[i] < '0' || name[i] > '9')")
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lines.append("\t\t\treturn false;")
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lines.append("\treturn true;")
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lines.append("}")
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lines.append("")
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lines.append("static inline bool vpnhide_iface_equals_ci(")
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lines.append("\tconst char *name, const char *other)")
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lines.append("{")
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lines.append("\tsize_t i;")
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lines.append("\tfor (i = 0; other[i]; i++) {")
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lines.append("\t\tif (!name[i])")
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lines.append("\t\t\treturn false;")
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lines.append("\t\tif (tolower((unsigned char)name[i]) !=")
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lines.append("\t\t (unsigned char)other[i])")
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lines.append("\t\t\treturn false;")
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lines.append("\t}")
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lines.append("\treturn name[i] == '\\0';")
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lines.append("}")
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lines.append("")
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lines.append("static inline bool vpnhide_iface_contains_ci(")
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lines.append("\tconst char *name, const char *needle)")
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lines.append("{")
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lines.append("\tsize_t nlen = strlen(needle);")
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lines.append("\tsize_t i, j;")
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lines.append("\tif (nlen == 0)")
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lines.append("\t\treturn true;")
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lines.append("\tfor (i = 0; name[i]; i++) {")
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lines.append("\t\tfor (j = 0; j < nlen; j++) {")
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lines.append("\t\t\tif (!name[i + j])")
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lines.append("\t\t\t\treturn false;")
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lines.append("\t\t\tif (tolower((unsigned char)name[i + j]) !=")
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lines.append("\t\t\t (unsigned char)needle[j])")
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lines.append("\t\t\t\tbreak;")
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lines.append("\t\t}")
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lines.append("\t\tif (j == nlen)")
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lines.append("\t\t\treturn true;")
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lines.append("\t}")
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lines.append("\treturn false;")
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lines.append("}")
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lines.append("")
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lines.append("static inline bool vpnhide_iface_is_vpn(const char *name)")
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lines.append("{")
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lines.append("\tif (!name || !name[0])")
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lines.append("\t\treturn false;")
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for r in rules:
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if r.note:
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lines.append(f"\t/* {r.note} */")
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if r.kind == "exact":
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fn = "vpnhide_iface_equals_ci"
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elif r.kind == "prefix":
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fn = "vpnhide_iface_starts_with_ci"
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elif r.kind == "prefix_digits":
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fn = "vpnhide_iface_starts_with_then_digits_ci"
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elif r.kind == "contains":
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fn = "vpnhide_iface_contains_ci"
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lines.append(f"\tif ({fn}(name, {c_str_lit(r.needle)}))")
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lines.append("\t\treturn true;")
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lines.append("\treturn false;")
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lines.append("}")
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lines.append("")
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lines.append("#endif /* VPNHIDE_GENERATED_IFACE_LISTS_H */")
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lines.append("")
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return "\n".join(lines)
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def emit_kmod_test(tests: list[TestVector]) -> str:
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"""Render a userspace test driver.
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Built in CI's lint job (gcc on the host). Includes the same
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iface_lists.h that the kernel module uses, but compiles with
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libc headers via the !__KERNEL__ branch of the header guard.
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"""
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lines: list[str] = []
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lines.append(f"/* {GENERATED_HEADER_LINE} */")
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lines.append("/*")
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lines.append(" * Userspace test driver for generated/iface_lists.h.")
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lines.append(" * Build: gcc -O2 -Wall -Werror -o test_iface_lists test_iface_lists.c")
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lines.append(" * Run: ./test_iface_lists (exit 0 on success, 1 on failure)")
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lines.append(" */")
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lines.append("")
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lines.append("#include <stdbool.h>")
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lines.append("#include <stdio.h>")
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lines.append("")
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lines.append('#include "generated/iface_lists.h"')
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lines.append("")
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lines.append("static int failures;")
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lines.append("")
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lines.append("static void check(const char *name, bool expected)")
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lines.append("{")
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lines.append("\tbool got = vpnhide_iface_is_vpn(name);")
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lines.append("\tif (got != expected) {")
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lines.append('\t\tfprintf(stderr, "FAIL: vpnhide_iface_is_vpn(\\"%s\\") = %s, expected %s\\n",')
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lines.append('\t\t\tname, got ? "true" : "false", expected ? "true" : "false");')
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lines.append("\t\tfailures++;")
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lines.append("\t}")
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lines.append("}")
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lines.append("")
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lines.append("int main(void)")
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lines.append("{")
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for t in tests:
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expected = "true" if t.is_vpn else "false"
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lines.append(f"\tcheck({c_str_lit(t.name)}, {expected});")
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lines.append("")
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lines.append("\tif (failures) {")
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lines.append('\t\tfprintf(stderr, "%d test(s) failed\\n", failures);')
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lines.append("\t\treturn 1;")
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lines.append("\t}")
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lines.append(f'\tprintf("OK: {len(tests)} vectors passed\\n");')
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lines.append("\treturn 0;")
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lines.append("}")
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lines.append("")
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return "\n".join(lines)
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# ---------------------------------------------------------------------------
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# Rust emitter (zygisk + lsposed/native — same body)
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# ---------------------------------------------------------------------------
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def emit_rust(rules: list[Rule], tests: list[TestVector]) -> str:
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lines: list[str] = []
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lines.append(f"// {GENERATED_HEADER_LINE}")
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lines.append("")
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lines.append("#![allow(dead_code)]")
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lines.append("")
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lines.append("fn starts_with_ci(name: &[u8], prefix: &[u8]) -> bool {")
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lines.append(" if name.len() < prefix.len() {")
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lines.append(" return false;")
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lines.append(" }")
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lines.append(" for (i, &p) in prefix.iter().enumerate() {")
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lines.append(" if name[i].to_ascii_lowercase() != p {")
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lines.append(" return false;")
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lines.append(" }")
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lines.append(" }")
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lines.append(" true")
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lines.append("}")
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lines.append("")
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lines.append("fn starts_with_then_digits_ci(name: &[u8], prefix: &[u8]) -> bool {")
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lines.append(" if !starts_with_ci(name, prefix) {")
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lines.append(" return false;")
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lines.append(" }")
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lines.append(" let rest = &name[prefix.len()..];")
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lines.append(" !rest.is_empty() && rest.iter().all(|b| b.is_ascii_digit())")
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lines.append("}")
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lines.append("")
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lines.append("fn equals_ci(name: &[u8], other: &[u8]) -> bool {")
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lines.append(" if name.len() != other.len() {")
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lines.append(" return false;")
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lines.append(" }")
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lines.append(" name.iter()")
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lines.append(" .zip(other.iter())")
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lines.append(" .all(|(a, b)| a.to_ascii_lowercase() == *b)")
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lines.append("}")
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lines.append("")
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lines.append("fn contains_ci(haystack: &[u8], needle: &[u8]) -> bool {")
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lines.append(" if needle.is_empty() {")
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lines.append(" return true;")
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lines.append(" }")
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lines.append(" if needle.len() > haystack.len() {")
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lines.append(" return false;")
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lines.append(" }")
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lines.append(" for start in 0..=haystack.len() - needle.len() {")
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lines.append(" let window = &haystack[start..start + needle.len()];")
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lines.append(" if window")
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lines.append(" .iter()")
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lines.append(" .zip(needle.iter())")
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lines.append(" .all(|(a, b)| a.eq_ignore_ascii_case(b))")
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lines.append(" {")
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lines.append(" return true;")
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lines.append(" }")
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lines.append(" }")
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lines.append(" false")
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lines.append("}")
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lines.append("")
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lines.append("/// True if the name matches any VPN-iface rule from data/interfaces.toml.")
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lines.append("pub fn matches_vpn(name: &[u8]) -> bool {")
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lines.append(" if name.is_empty() {")
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lines.append(" return false;")
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lines.append(" }")
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for r in rules:
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if r.note:
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lines.append(f" // {r.note}")
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if r.kind == "exact":
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fn = "equals_ci"
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elif r.kind == "prefix":
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fn = "starts_with_ci"
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elif r.kind == "prefix_digits":
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fn = "starts_with_then_digits_ci"
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elif r.kind == "contains":
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fn = "contains_ci"
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lines.append(f" if {fn}(name, {rust_byte_lit(r.needle)}) {{")
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lines.append(" return true;")
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lines.append(" }")
|
|
lines.append(" false")
|
|
lines.append("}")
|
|
lines.append("")
|
|
# Test module — generated assertions are wide; skip rustfmt rather
|
|
# than wrap each assertion across 5 lines.
|
|
lines.append("#[cfg(test)]")
|
|
lines.append("#[rustfmt::skip]")
|
|
lines.append("mod tests {")
|
|
lines.append(" use super::*;")
|
|
lines.append("")
|
|
lines.append(" #[test]")
|
|
lines.append(" fn generated_vectors() {")
|
|
for t in tests:
|
|
expected = "true" if t.is_vpn else "false"
|
|
lines.append(
|
|
f" assert_eq!(matches_vpn({rust_byte_lit(t.name)}), {expected}, "
|
|
f"\"matches_vpn({t.name!r})\");"
|
|
)
|
|
lines.append(" }")
|
|
lines.append("}")
|
|
lines.append("")
|
|
return "\n".join(lines)
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Kotlin emitter (production code + separate test class)
|
|
# ---------------------------------------------------------------------------
|
|
|
|
|
|
def emit_kotlin(rules: list[Rule]) -> str:
|
|
lines: list[str] = []
|
|
lines.append(f"// {GENERATED_HEADER_LINE}")
|
|
lines.append("")
|
|
lines.append("package dev.okhsunrog.vpnhide.generated")
|
|
lines.append("")
|
|
lines.append("internal object IfaceLists {")
|
|
lines.append(" /** True if `name` looks like a VPN tunnel per data/interfaces.toml. */")
|
|
lines.append(" fun isVpnIface(name: String): Boolean {")
|
|
lines.append(" if (name.isEmpty()) return false")
|
|
lines.append(" val n = name.lowercase()")
|
|
for r in rules:
|
|
if r.note:
|
|
lines.append(f" // {r.note}")
|
|
if r.kind == "exact":
|
|
cond = f"n == {kt_str_lit(r.needle)}"
|
|
elif r.kind == "prefix":
|
|
cond = f"n.startsWith({kt_str_lit(r.needle)})"
|
|
elif r.kind == "prefix_digits":
|
|
lit = kt_str_lit(r.needle)
|
|
cond = (
|
|
f"n.startsWith({lit}) && "
|
|
f"n.length > {len(r.needle)} && "
|
|
f"n.substring({len(r.needle)}).all {{ it.isDigit() }}"
|
|
)
|
|
elif r.kind == "contains":
|
|
cond = f"n.contains({kt_str_lit(r.needle)})"
|
|
lines.append(f" if ({cond}) return true")
|
|
lines.append(" return false")
|
|
lines.append(" }")
|
|
lines.append("}")
|
|
lines.append("")
|
|
return "\n".join(lines)
|
|
|
|
|
|
def emit_kotlin_test(tests: list[TestVector]) -> str:
|
|
lines: list[str] = []
|
|
lines.append(f"// {GENERATED_HEADER_LINE}")
|
|
lines.append("")
|
|
lines.append("package dev.okhsunrog.vpnhide.generated")
|
|
lines.append("")
|
|
lines.append("import org.junit.Assert.assertEquals")
|
|
lines.append("import org.junit.Test")
|
|
lines.append("")
|
|
lines.append("class IfaceListsGeneratedTest {")
|
|
lines.append(" @Test")
|
|
lines.append(" fun `generated vectors`() {")
|
|
for t in tests:
|
|
expected = "true" if t.is_vpn else "false"
|
|
lines.append(
|
|
f" assertEquals({kt_str_lit(t.name)}, {expected}, "
|
|
f"IfaceLists.isVpnIface({kt_str_lit(t.name)}))"
|
|
)
|
|
lines.append(" }")
|
|
lines.append("}")
|
|
lines.append("")
|
|
return "\n".join(lines)
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# main
|
|
# ---------------------------------------------------------------------------
|
|
|
|
|
|
def write_if_changed(path: Path, content: str) -> bool:
|
|
path.parent.mkdir(parents=True, exist_ok=True)
|
|
if path.exists() and path.read_text(encoding="utf-8") == content:
|
|
return False
|
|
path.write_text(content, encoding="utf-8")
|
|
return True
|
|
|
|
|
|
def main() -> int:
|
|
rules, tests = load()
|
|
rust_body = emit_rust(rules, tests)
|
|
outputs = {
|
|
OUT_KMOD: emit_kmod(rules),
|
|
OUT_KMOD_TEST: emit_kmod_test(tests),
|
|
OUT_ZYGISK: rust_body,
|
|
OUT_LSP_NATIVE: rust_body,
|
|
OUT_LSP_KT: emit_kotlin(rules),
|
|
OUT_LSP_KT_TEST: emit_kotlin_test(tests),
|
|
}
|
|
changed = []
|
|
for path, content in outputs.items():
|
|
if write_if_changed(path, content):
|
|
changed.append(path.relative_to(REPO_ROOT))
|
|
|
|
if changed:
|
|
print("Regenerated:")
|
|
for p in changed:
|
|
print(f" {p}")
|
|
else:
|
|
print("All generated files already up to date.")
|
|
return 0
|
|
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(main())
|