tun_rs/platform/unix/
device.rs

1use crate::platform::unix::{Fd, Tun};
2use crate::platform::DeviceImpl;
3#[cfg(any(
4    all(target_os = "linux", not(target_env = "ohos")),
5    target_os = "macos",
6    target_os = "freebsd",
7    target_os = "openbsd",
8    target_os = "netbsd",
9))]
10use libc::{AF_INET, AF_INET6, SOCK_DGRAM};
11use std::io;
12use std::io::{IoSlice, IoSliceMut};
13use std::os::fd::{AsFd, AsRawFd, BorrowedFd, FromRawFd, RawFd};
14
15impl FromRawFd for DeviceImpl {
16    unsafe fn from_raw_fd(fd: RawFd) -> Self {
17        DeviceImpl::from_fd(fd).unwrap()
18    }
19}
20impl AsRawFd for DeviceImpl {
21    fn as_raw_fd(&self) -> RawFd {
22        self.tun.as_raw_fd()
23    }
24}
25impl AsFd for DeviceImpl {
26    fn as_fd(&self) -> BorrowedFd<'_> {
27        unsafe { BorrowedFd::borrow_raw(self.as_raw_fd()) }
28    }
29}
30#[cfg(not(any(target_os = "freebsd", target_os = "netbsd", target_os = "openbsd")))]
31impl std::os::unix::io::IntoRawFd for DeviceImpl {
32    fn into_raw_fd(self) -> RawFd {
33        self.tun.into_raw_fd()
34    }
35}
36impl DeviceImpl {
37    /// # Safety
38    /// The fd passed in must be an owned file descriptor; in particular, it must be open.
39    pub(crate) unsafe fn from_fd(fd: RawFd) -> io::Result<Self> {
40        let tun = Fd::new_unchecked(fd);
41        DeviceImpl::from_tun(Tun::new(tun))
42    }
43    pub(crate) fn is_nonblocking(&self) -> io::Result<bool> {
44        self.tun.is_nonblocking()
45    }
46    /// Moves this Device into or out of nonblocking mode.
47    pub(crate) fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
48        self.tun.set_nonblocking(nonblocking)
49    }
50
51    /// Recv a packet from tun device
52    pub(crate) fn recv(&self, buf: &mut [u8]) -> io::Result<usize> {
53        self.tun.recv(buf)
54    }
55    pub(crate) fn recv_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
56        self.tun.recv_vectored(bufs)
57    }
58
59    /// Send a packet to tun device
60    pub(crate) fn send(&self, buf: &[u8]) -> io::Result<usize> {
61        self.tun.send(buf)
62    }
63    pub(crate) fn send_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
64        self.tun.send_vectored(bufs)
65    }
66    #[cfg(feature = "interruptible")]
67    pub(crate) fn read_interruptible(
68        &self,
69        buf: &mut [u8],
70        event: &crate::InterruptEvent,
71    ) -> io::Result<usize> {
72        self.tun.read_interruptible(buf, event)
73    }
74    #[cfg(feature = "interruptible")]
75    pub(crate) fn readv_interruptible(
76        &self,
77        bufs: &mut [IoSliceMut<'_>],
78        event: &crate::InterruptEvent,
79    ) -> io::Result<usize> {
80        self.tun.readv_interruptible(bufs, event)
81    }
82    #[cfg(feature = "interruptible")]
83    #[inline]
84    pub(crate) fn wait_readable_interruptible(
85        &self,
86        event: &crate::InterruptEvent,
87    ) -> io::Result<()> {
88        self.tun.wait_readable_interruptible(event)
89    }
90    #[cfg(feature = "interruptible")]
91    pub(crate) fn write_interruptible(
92        &self,
93        buf: &[u8],
94        event: &crate::InterruptEvent,
95    ) -> io::Result<usize> {
96        self.tun.write_interruptible(buf, event)
97    }
98    #[cfg(feature = "interruptible")]
99    #[inline]
100    pub(crate) fn writev_interruptible(
101        &self,
102        bufs: &[IoSlice<'_>],
103        event: &crate::InterruptEvent,
104    ) -> io::Result<usize> {
105        self.tun.writev_interruptible(bufs, event)
106    }
107    #[cfg(feature = "interruptible")]
108    #[inline]
109    pub(crate) fn wait_writable_interruptible(
110        &self,
111        event: &crate::InterruptEvent,
112    ) -> io::Result<()> {
113        self.tun.wait_writable_interruptible(event)
114    }
115}
116#[cfg(any(
117    all(target_os = "linux", not(target_env = "ohos")),
118    target_os = "macos",
119    target_os = "freebsd",
120    target_os = "openbsd",
121    target_os = "netbsd",
122))]
123impl DeviceImpl {
124    /// Retrieves the interface index for the network interface.
125    ///
126    /// This function converts the interface name (obtained via `self.name()`) into a
127    /// C-compatible string (CString) and then calls the libc function `if_nametoindex`
128    /// to retrieve the corresponding interface index.
129    pub fn if_index(&self) -> io::Result<u32> {
130        let _guard = self.op_lock.lock().unwrap();
131        self.if_index_impl()
132    }
133    pub(crate) fn if_index_impl(&self) -> io::Result<u32> {
134        let if_name = std::ffi::CString::new(self.name_impl()?)?;
135        unsafe { Ok(libc::if_nametoindex(if_name.as_ptr())) }
136    }
137    /// Retrieves all IP addresses associated with the network interface.
138    ///
139    /// This function calls `getifaddrs` with the interface name,
140    /// then iterates over the returned list of interface addresses, extracting and collecting
141    /// the IP addresses into a vector.
142    pub fn addresses(&self) -> io::Result<Vec<std::net::IpAddr>> {
143        Ok(crate::platform::get_if_addrs_by_name(self.name_impl()?)?
144            .iter()
145            .map(|v| v.address)
146            .collect())
147    }
148}
149#[cfg(any(target_os = "macos", target_os = "ios", target_os = "tvos",))]
150impl DeviceImpl {
151    /// Returns whether the TUN device is set to ignore packet information (PI).
152    ///
153    /// When enabled, the device does not prepend the `struct tun_pi` header
154    /// to packets, which can simplify packet processing in some cases.
155    ///
156    /// # Returns
157    /// * `true` - The TUN device ignores packet information.
158    /// * `false` - The TUN device includes packet information.
159    pub fn ignore_packet_info(&self) -> bool {
160        let _guard = self.op_lock.lock().unwrap();
161        self.tun.ignore_packet_info()
162    }
163    /// Sets whether the TUN device should ignore packet information (PI).
164    ///
165    /// When `ignore_packet_info` is set to `true`, the TUN device does not
166    /// prepend the `struct tun_pi` header to packets. This can be useful
167    /// if the additional metadata is not needed.
168    ///
169    /// # Parameters
170    /// * `ign` - If `true`, the TUN device will ignore packet information.
171    ///   `  ` If `false`, it will include packet information.
172    pub fn set_ignore_packet_info(&self, ign: bool) {
173        let _guard = self.op_lock.lock().unwrap();
174        self.tun.set_ignore_packet_info(ign)
175    }
176}
177#[cfg(any(
178    all(target_os = "linux", not(target_env = "ohos")),
179    target_os = "freebsd",
180    target_os = "openbsd",
181    target_os = "netbsd",
182))]
183pub(crate) unsafe fn ctl() -> io::Result<Fd> {
184    Fd::new(libc::socket(AF_INET, SOCK_DGRAM | libc::SOCK_CLOEXEC, 0))
185}
186#[cfg(target_os = "macos")]
187pub(crate) unsafe fn ctl() -> io::Result<Fd> {
188    let fd = Fd::new(libc::socket(AF_INET, SOCK_DGRAM, 0))?;
189    _ = fd.set_cloexec();
190    Ok(fd)
191}
192#[cfg(any(
193    all(target_os = "linux", not(target_env = "ohos")),
194    target_os = "freebsd",
195    target_os = "openbsd",
196    target_os = "netbsd",
197))]
198pub(crate) unsafe fn ctl_v6() -> io::Result<Fd> {
199    Fd::new(libc::socket(AF_INET6, SOCK_DGRAM | libc::SOCK_CLOEXEC, 0))
200}
201#[cfg(target_os = "macos")]
202pub(crate) unsafe fn ctl_v6() -> io::Result<Fd> {
203    let fd = Fd::new(libc::socket(AF_INET6, SOCK_DGRAM, 0))?;
204    _ = fd.set_cloexec();
205    Ok(fd)
206}
tun_rs/platform/unix/device.rs

tun_rs/platform/unix/
device.rs
