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657a3912 · nanamicat · 657a3912 · 657a3912 · 657a3912 · 657a3912
Commit 657a3912 authored Feb 01, 2025 by nanamicat
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.gitignore .gitignore +2 -0

Cargo.lock Cargo.lock +513 -0

Cargo.toml Cargo.toml +10 -0

src/main.rs src/main.rs +89 -0

No files found.
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--- a/Cargo.toml
+++ b/Cargo.toml
+[package]
+name = "tun1"
+version = "0.1.0"
+edition = "2021"
+[dependencies]
+tun = "0.7"
+socket2 = { version = "0.5.8", features = ["all"] }
+#pnet = "0.35.0"
+#pnet_macros = "0.35.0"
--- a/src/main.rs
+++ b/src/main.rs
+use socket2::{Domain, Protocol, SockAddr, Socket, Type};
+use std::error::Error;
+use std::io::{BufRead, Write};
+use std::mem::{transmute, MaybeUninit};
+use std::{env, thread};
+#[repr(C)]
+pub struct Meta {
+    pub src_id: u8,
+    pub dst_id: u8,
+    pub reversed: u16,
+}
+struct Secret {
+    key: Vec<u8>,
+}
+impl Secret {
+    fn new(key: &String) -> Secret {
+        Secret {
+            key: key.as_bytes().to_vec(),
+        }
+    }
+    fn encrypt(&self, data: &mut [u8]) {
+        for (i, byte) in data.iter_mut().enumerate() {
+            *byte ^= self.key[i % self.key.len()];
+        }
+    }
+    fn decrypt(&self, data: &mut [u8]) {
+        self.encrypt(data);
+    }
+}
+fn main() -> Result<(), Box<dyn Error>> {
+    let local_id: u8 = env::var("LOCAL_ID")?.parse()?;
+    let remote_id: u8 = env::var("LOCAL_ID")?.parse()?;
+    let local_secret = Secret::new(&env::var("LOCAL_SECRET")?);
+    let remote_secret = Secret::new(&env::var("REMOTE_SECRET")?);
+    let mut config = tun::Configuration::default();
+    config
+        .address((10, 0, 0, 9))
+        .netmask((255, 255, 255, 0))
+        .destination((10, 0, 0, 1))
+        .up();
+    #[cfg(target_os = "linux")]
+    config.platform_config(|config| {
+        config.ensure_root_privileges(true);
+    });
+    let mut dev = tun::create(&config)?;
+    let (mut reader, mut writer) = dev.split();
+    // 创建用于接收的原始套接字，协议号为 144
+    let socket = Socket::new(Domain::IPV4, Type::RAW, Some(Protocol::from(144)))?;
+    let local_id = 0u8;
+    let remote_id = 0u8;
+    let inbound = thread::spawn(move || {
+        let mut recv_buf = [MaybeUninit::uninit(); 1500];
+        let mut addr: SockAddr;
+        loop {
+            match socket.recv_from(&mut recv_buf) {
+                Ok((len, addr1)) => {
+                    println!("recv from {:?}", recv_buf);
+                    // if let Some(packet) = Ipv4Packet::new(unsafe { transmute(&recv_buf[..len]) }) {
+                    //     let (meta1, payload) = packet.payload().split_at_mut(size_of::<Meta>());
+                    //     let meta: &Meta = unsafe { transmute(&meta1) };
+                    //     if meta.src_id == remote_id && meta.dst_id == local_id && meta.reversed == 0
+                    //     {
+                    //         addr = addr1;
+                    //         remote_secret.encrypt(payload);
+                    //         writer.write_all(payload);
+                    //     }
+                    // }
+                }
+                Err(e) => {
+                    eprintln!("接收数据包时出错: {:?}", e);
+                }
+            }
+        }
+    });
+    inbound.join();
+    Ok(())
+}