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-rw-r--r--src/platform/linux.rs314
1 files changed, 13 insertions, 301 deletions
diff --git a/src/platform/linux.rs b/src/platform/linux.rs
index 2571cb1..32fd819 100644
--- a/src/platform/linux.rs
+++ b/src/platform/linux.rs
@@ -1,19 +1,5 @@
-// Copyright 2025-2026 Dillution <[email protected]>.
-//
-// This file is part of DPIBreak.
-//
-// DPIBreak is free software: you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by the
-// Free Software Foundation, either version 3 of the License, or (at your
-// option) any later version.
-//
-// DPIBreak is distributed in the hope that it will be useful, but WITHOUT
-// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-// for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with DPIBreak. If not, see <https://www.gnu.org/licenses/>.
+// SPDX-FileCopyrightText: 2025-2026 Dilluti0n <[email protected]>
+// SPDX-License-Identifier: GPL-3.0-or-later
use std::sync::{
atomic::{AtomicBool, Ordering},
@@ -22,14 +8,19 @@ use std::sync::{
};
use std::process::{Command, Stdio};
use std::io::Write;
-use anyhow::{Result, Error, Context, anyhow};
+use anyhow::{Result, Context, anyhow};
+
use crate::{log::LogLevel, log_println, splash, MESSAGE_AT_RUN};
+mod iptables;
+mod nftables;
+
+use iptables::*;
+use nftables::*;
+
pub static IS_U32_SUPPORTED: AtomicBool = AtomicBool::new(false);
-pub static IS_XT_U32_LOADED_BY_US: AtomicBool = AtomicBool::new(false);
-static IS_NFT_NOT_SUPPORTED: AtomicBool = AtomicBool::new(false);
+pub static IS_NFT_NOT_SUPPORTED: AtomicBool = AtomicBool::new(false);
-const DPIBREAK_CHAIN: &str = "DPIBREAK";
const INJECT_MARK: u32 = 0xD001;
fn exec_process(args: &[&str], input: Option<&str>) -> Result<()> {
@@ -66,273 +57,6 @@ fn exec_process(args: &[&str], input: Option<&str>) -> Result<()> {
}
}
-pub struct IPTables {
- cmd: &'static str,
-}
-
-impl IPTables {
- pub fn new(is_ipv6: bool) -> Result<Self> {
- Ok(Self {
- cmd: if is_ipv6 { "ip6tables" } else { "iptables" },
- })
- }
-
- fn run(&self, args: &[&str]) -> Result<()> {
- let mut full_args = Vec::with_capacity(args.len() + 1);
-
- full_args.push(self.cmd);
- full_args.extend_from_slice(args);
-
- exec_process(&full_args, None)
- }
-
- pub fn new_chain(&self, table: &str, chain: &str) -> Result<()> {
- self.run(&["-t", table, "-N", chain])
- }
-
- pub fn flush_chain(&self, table: &str, chain: &str) -> Result<()> {
- self.run(&["-t", table, "-F", chain])
- }
-
- pub fn delete_chain(&self, table: &str, chain: &str) -> Result<()> {
- self.run(&["-t", table, "-X", chain])
- }
-
- pub fn insert(&self, table: &str, chain: &str, rule: &[&str], pos: i32) -> Result<()> {
- let pos_str = pos.to_string();
- let mut args = vec!["-t", table, "-I", chain, &pos_str];
- args.extend_from_slice(rule);
- self.run(&args)
- }
-
- pub fn append(&self, table: &str, chain: &str, rule: &[&str]) -> Result<()> {
- let mut args = vec!["-t", table, "-A", chain];
- args.extend_from_slice(rule);
- self.run(&args)
- }
-
- pub fn delete(&self, table: &str, chain: &str, rule: &[&str]) -> Result<()> {
- let mut args = vec!["-t", table, "-D", chain];
- args.extend_from_slice(rule);
- self.run(&args)
- }
-}
-
-/// Apply json format nft rules with `nft_command() -j -f -`.
-fn apply_nft_rules(rule: &str) -> Result<()> {
- exec_process(&[crate::opt::nft_command(), "-j", "-f", "-"], Some(rule))
-}
-
-fn is_xt_u32_loaded() -> bool {
- std::fs::read_to_string("/proc/modules")
- .map(|s| s.lines().any(|l| l.starts_with("xt_u32 ")))
- .unwrap_or(false)
-}
-
-fn ensure_xt_u32() -> Result<()> {
- let before = is_xt_u32_loaded();
- Command::new("modprobe").args(&["-q", "xt_u32"]).status()?;
- let after = is_xt_u32_loaded();
-
- if !before && after {
- IS_XT_U32_LOADED_BY_US.store(true, Ordering::Relaxed);
- }
- Ok(())
-}
-
-fn is_u32_supported(ipt: &IPTables) -> bool {
- if IS_U32_SUPPORTED.load(Ordering::Relaxed) {
- return true;
- }
-
- if ensure_xt_u32().is_err() {
- log_println!(LogLevel::Warning, "xt_u32 not supported");
- return false;
- }
-
- log_println!(LogLevel::Info, "xt_u32 loaded");
-
- let rule = ["-m", "u32", "--u32", "0x0=0x0", "-j", "RETURN"];
-
- match ipt.insert("raw", "PREROUTING", &rule, 1) {
- Ok(_) => {
- _ = ipt.delete("raw", "PREROUTING", &rule);
- IS_U32_SUPPORTED.store(true, Ordering::Relaxed);
- true
- }
-
- Err(_) => false
- }
-}
-
-fn iptables_err(e: impl ToString) -> Error {
- Error::msg(format!("iptables: {}", e.to_string()))
-}
-
-fn install_iptables_rules(ipt: &IPTables) -> Result<()> {
- let q_num = crate::opt::queue_num().to_string();
-
- let mut rule = vec![
- "-p", "tcp", "--dport", "443",
- "-j", "NFQUEUE", "--queue-num", &q_num, "--queue-bypass"
- ];
-
- if is_u32_supported(ipt) {
- const U32: &str = "0>>22&0x3C @ 12>>26&0x3C @ 0>>24&0xFF=0x16 && \
- 0>>22&0x3C @ 12>>26&0x3C @ 2>>24&0xFF=0x01";
-
- rule.extend_from_slice(&["-m", "u32", "--u32", U32]);
- }
-
- ipt.new_chain("mangle", DPIBREAK_CHAIN).map_err(iptables_err)?;
-
- // prevent inf loop
- let mark = format!("{:#x}", INJECT_MARK);
- ipt.insert(
- "mangle",
- DPIBREAK_CHAIN,
- &["-m", "mark", "--mark", &mark, "-j", "RETURN"],
- 1
- ).map_err(iptables_err)?;
-
- ipt.append("mangle", DPIBREAK_CHAIN, &rule).map_err(iptables_err)?;
- log_println!(LogLevel::Info, "{}: new chain {} on table mangle", ipt.cmd, DPIBREAK_CHAIN);
-
- ipt.insert("mangle", "POSTROUTING", &["-j", DPIBREAK_CHAIN], 1).map_err(iptables_err)?;
- log_println!(LogLevel::Info, "{}: add jump to {} chain on POSTROUTING", ipt.cmd, DPIBREAK_CHAIN);
-
- Ok(())
-}
-
-fn cleanup_iptables_rules(ipt: &IPTables) -> Result<()> {
- if ipt.delete("mangle", "POSTROUTING", &["-j", DPIBREAK_CHAIN]).is_ok() {
- log_println!(LogLevel::Info, "{}: deleted jump from POSTROUTING", ipt.cmd);
- }
-
- if ipt.flush_chain("mangle", DPIBREAK_CHAIN).is_ok() {
- log_println!(LogLevel::Info, "{}: flush chain {}", ipt.cmd, DPIBREAK_CHAIN);
- }
-
- if ipt.delete_chain("mangle", DPIBREAK_CHAIN).is_ok() {
- log_println!(LogLevel::Info, "{}: delete chain {}", ipt.cmd, DPIBREAK_CHAIN);
- }
-
- Ok(())
-}
-
-const DPIBREAK_TABLE: &str = "dpibreak";
-
-fn install_nft_rules() -> Result<()> {
- let rule = serde_json::json!(
- {
- "nftables": [
- {"add": {"table": {"family": "inet", "name": DPIBREAK_TABLE}}},
- {
- "add": {
- "chain": {
- "family": "inet",
- "table": DPIBREAK_TABLE,
- "name": "OUTPUT",
- "type": "filter",
- "hook": "output",
- "prio": 0,
- "policy": "accept",
- }
- }
- },
- {
- "add": {
- "chain": {
- "family": "inet",
- "table": DPIBREAK_TABLE,
- "name": DPIBREAK_CHAIN
- }
- }
- },
- // prevent inf loop
- {
- "add": {
- "rule": {
- "family": "inet",
- "table": DPIBREAK_TABLE,
- "chain": DPIBREAK_CHAIN,
- "expr": [
- {
- "match": {
- "left": { "meta": { "key": "mark" }},
- "op": "==",
- "right": INJECT_MARK
- }
- },
- { "return": null }
- ]
- }
- }
- },
- {
- "add": {
- "rule": {
- "family": "inet",
- "table": DPIBREAK_TABLE,
- "chain": "OUTPUT",
- "expr": [{ "jump": { "target": DPIBREAK_CHAIN }}]
- }
- }
- },
- {
- "add": {
- "rule": {
- "family": "inet",
- "table": DPIBREAK_TABLE,
- "chain": DPIBREAK_CHAIN,
- "expr": [
- {
- "match": {
- "left": {"payload": { "protocol": "tcp", "field": "dport" }},
- "op": "==",
- "right": 443
- }
- },
- // TLS ContentType == 0x16 (Handshake)
- {
- "match": {
- "left": { "payload": { "base": "ih", "offset": 0, "len": 8 } },
- "op": "==",
- "right": 0x16
- }
- },
- // HandshakeType == 0x01 (ClientHello)
- {
- "match": {
- // Note: offset and len are both "bit" unit not byte
- "left": { "payload": { "base": "ih", "offset": 40, "len": 8 } },
- "op": "==",
- "right": 0x01
- }
- },
- {
- "queue": {
- "num": crate::opt::queue_num(),
- "flags": [ "bypass" ]
- }
- }
- ]
- }
- }
- }
- ]
- }
- );
-
- apply_nft_rules(&serde_json::to_string(&rule)?)?;
-
- // clienthello filtered by nft
- IS_U32_SUPPORTED.store(true, Ordering::Relaxed);
- log_println!(LogLevel::Info, "nftables: create table inet {DPIBREAK_TABLE}");
-
- Ok(())
-}
-
fn install_rules() -> Result<()> {
match install_nft_rules() {
Ok(_) => {},
@@ -362,26 +86,14 @@ fn cleanup_rules() -> Result<()> {
cleanup_iptables_rules(&ipt)?;
cleanup_iptables_rules(&ip6)?;
} else {
- // nft delete table inet dpibreak
- let rule = serde_json::json!({
- "nftables": [
- {"delete": {"table": {"family": "inet", "name": DPIBREAK_TABLE}}}
- ]
- });
- apply_nft_rules(&serde_json::to_string(&rule)?)?;
- log_println!(LogLevel::Info, "cleanup: nftables: delete table inet {}", DPIBREAK_TABLE);
+ cleanup_nftables_rules()?;
}
-
Ok(())
}
pub fn cleanup() -> Result<()> {
cleanup_rules()?;
-
- if IS_XT_U32_LOADED_BY_US.load(Ordering::Relaxed) {
- exec_process(&["modprobe", "-q", "-r", "xt_u32"], None)?;
- log_println!(LogLevel::Info, "cleanup: unload xt_u32");
- }
+ cleanup_xt_u32()?;
Ok(())
}
generated by cgit v1.2.3 (git 2.46.0) at 2026-08-29 07:51:38 +0000