调整项目结构、尝试支持安卓

switch/src/tun_device/linux.rs

@@ -0,0 +1,39 @@
+use std::io;
+use std::io::{Error, Read, Write};
+use std::net::Ipv4Addr;
+use std::os::unix::process::CommandExt;
+use std::process::Command;
+
+use bytes::BufMut;
+use tun::Device;
+use tun::platform::posix::{Reader, Writer};
+
+use crate::tun_device::{TunReader, TunWriter};
+
+pub fn create_tun(
+    address: Ipv4Addr,
+    netmask: Ipv4Addr,
+    gateway: Ipv4Addr,
+) -> crate::error::Result<(TunWriter, TunReader)> {
+    let mut config = tun::Configuration::default();
+
+    config
+        .destination(gateway)
+        .address(address)
+        .netmask(netmask)
+        .mtu(1420)
+        .up();
+
+    config.platform(|config| {
+        config.packet_information(true);
+    });
+
+    let mut dev = tun::create(&config).unwrap();
+    let packet_information = dev.has_packet_information();
+    let (reader, writer) = dev.split();
+    Ok((
+        TunWriter(writer, packet_information),
+        TunReader(reader, packet_information),
+    ))
+}
+