mirror of
https://github.com/jiangcuo/nix.git
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1028 lines
37 KiB
Rust
1028 lines
37 KiB
Rust
//! Socket options as used by `setsockopt` and `getsockopt`.
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use cfg_if::cfg_if;
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use super::{GetSockOpt, SetSockOpt};
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use crate::Result;
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use crate::errno::Errno;
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use crate::sys::time::TimeVal;
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use libc::{self, c_int, c_void, socklen_t};
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use std::mem::{
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self,
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MaybeUninit
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};
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use std::os::unix::io::RawFd;
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use std::ffi::{OsStr, OsString};
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#[cfg(target_family = "unix")]
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use std::os::unix::ffi::OsStrExt;
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// Constants
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// TCP_CA_NAME_MAX isn't defined in user space include files
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#[cfg(any(target_os = "freebsd", target_os = "linux"))]
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#[cfg(feature = "net")]
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const TCP_CA_NAME_MAX: usize = 16;
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/// Helper for implementing `SetSockOpt` for a given socket option. See
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/// [`::sys::socket::SetSockOpt`](sys/socket/trait.SetSockOpt.html).
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///
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/// This macro aims to help implementing `SetSockOpt` for different socket options that accept
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/// different kinds of data to be used with `setsockopt`.
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///
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/// Instead of using this macro directly consider using `sockopt_impl!`, especially if the option
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/// you are implementing represents a simple type.
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///
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/// # Arguments
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///
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/// * `$name:ident`: name of the type you want to implement `SetSockOpt` for.
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/// * `$level:expr` : socket layer, or a `protocol level`: could be *raw sockets*
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/// (`libc::SOL_SOCKET`), *ip protocol* (libc::IPPROTO_IP), *tcp protocol* (`libc::IPPROTO_TCP`),
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/// and more. Please refer to your system manual for more options. Will be passed as the second
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/// argument (`level`) to the `setsockopt` call.
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/// * `$flag:path`: a flag name to set. Some examples: `libc::SO_REUSEADDR`, `libc::TCP_NODELAY`,
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/// `libc::IP_ADD_MEMBERSHIP` and others. Will be passed as the third argument (`option_name`)
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/// to the `setsockopt` call.
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/// * Type of the value that you are going to set.
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/// * Type that implements the `Set` trait for the type from the previous item (like `SetBool` for
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/// `bool`, `SetUsize` for `usize`, etc.).
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macro_rules! setsockopt_impl {
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($name:ident, $level:expr, $flag:path, $ty:ty, $setter:ty) => {
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impl SetSockOpt for $name {
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type Val = $ty;
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fn set(&self, fd: RawFd, val: &$ty) -> Result<()> {
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unsafe {
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let setter: $setter = Set::new(val);
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let res = libc::setsockopt(fd, $level, $flag,
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setter.ffi_ptr(),
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setter.ffi_len());
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Errno::result(res).map(drop)
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}
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}
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}
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}
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}
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/// Helper for implementing `GetSockOpt` for a given socket option. See
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/// [`::sys::socket::GetSockOpt`](sys/socket/trait.GetSockOpt.html).
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///
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/// This macro aims to help implementing `GetSockOpt` for different socket options that accept
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/// different kinds of data to be use with `getsockopt`.
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///
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/// Instead of using this macro directly consider using `sockopt_impl!`, especially if the option
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/// you are implementing represents a simple type.
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///
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/// # Arguments
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///
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/// * Name of the type you want to implement `GetSockOpt` for.
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/// * Socket layer, or a `protocol level`: could be *raw sockets* (`lic::SOL_SOCKET`), *ip
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/// protocol* (libc::IPPROTO_IP), *tcp protocol* (`libc::IPPROTO_TCP`), and more. Please refer
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/// to your system manual for more options. Will be passed as the second argument (`level`) to
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/// the `getsockopt` call.
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/// * A flag to set. Some examples: `libc::SO_REUSEADDR`, `libc::TCP_NODELAY`,
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/// `libc::SO_ORIGINAL_DST` and others. Will be passed as the third argument (`option_name`) to
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/// the `getsockopt` call.
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/// * Type of the value that you are going to get.
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/// * Type that implements the `Get` trait for the type from the previous item (`GetBool` for
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/// `bool`, `GetUsize` for `usize`, etc.).
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macro_rules! getsockopt_impl {
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($name:ident, $level:expr, $flag:path, $ty:ty, $getter:ty) => {
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impl GetSockOpt for $name {
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type Val = $ty;
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fn get(&self, fd: RawFd) -> Result<$ty> {
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unsafe {
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let mut getter: $getter = Get::uninit();
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let res = libc::getsockopt(fd, $level, $flag,
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getter.ffi_ptr(),
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getter.ffi_len());
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Errno::result(res)?;
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Ok(getter.assume_init())
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}
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}
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}
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}
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}
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/// Helper to generate the sockopt accessors. See
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/// [`::sys::socket::GetSockOpt`](sys/socket/trait.GetSockOpt.html) and
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/// [`::sys::socket::SetSockOpt`](sys/socket/trait.SetSockOpt.html).
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///
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/// This macro aims to help implementing `GetSockOpt` and `SetSockOpt` for different socket options
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/// that accept different kinds of data to be use with `getsockopt` and `setsockopt` respectively.
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///
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/// Basically this macro wraps up the [`getsockopt_impl!`](macro.getsockopt_impl.html) and
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/// [`setsockopt_impl!`](macro.setsockopt_impl.html) macros.
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///
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/// # Arguments
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///
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/// * `GetOnly`, `SetOnly` or `Both`: whether you want to implement only getter, only setter or
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/// both of them.
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/// * `$name:ident`: name of type `GetSockOpt`/`SetSockOpt` will be implemented for.
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/// * `$level:expr` : socket layer, or a `protocol level`: could be *raw sockets*
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/// (`lic::SOL_SOCKET`), *ip protocol* (libc::IPPROTO_IP), *tcp protocol* (`libc::IPPROTO_TCP`),
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/// and more. Please refer to your system manual for more options. Will be passed as the second
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/// argument (`level`) to the `getsockopt`/`setsockopt` call.
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/// * `$flag:path`: a flag name to set. Some examples: `libc::SO_REUSEADDR`, `libc::TCP_NODELAY`,
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/// `libc::IP_ADD_MEMBERSHIP` and others. Will be passed as the third argument (`option_name`)
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/// to the `setsockopt`/`getsockopt` call.
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/// * `$ty:ty`: type of the value that will be get/set.
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/// * `$getter:ty`: `Get` implementation; optional; only for `GetOnly` and `Both`.
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/// * `$setter:ty`: `Set` implementation; optional; only for `SetOnly` and `Both`.
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// Some targets don't use all rules.
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#[allow(unknown_lints)]
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#[allow(unused_macro_rules)]
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macro_rules! sockopt_impl {
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($(#[$attr:meta])* $name:ident, GetOnly, $level:expr, $flag:path, bool) => {
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sockopt_impl!($(#[$attr])*
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$name, GetOnly, $level, $flag, bool, GetBool);
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};
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($(#[$attr:meta])* $name:ident, GetOnly, $level:expr, $flag:path, u8) => {
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sockopt_impl!($(#[$attr])* $name, GetOnly, $level, $flag, u8, GetU8);
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};
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($(#[$attr:meta])* $name:ident, GetOnly, $level:expr, $flag:path, usize) =>
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{
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sockopt_impl!($(#[$attr])*
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$name, GetOnly, $level, $flag, usize, GetUsize);
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};
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($(#[$attr:meta])* $name:ident, SetOnly, $level:expr, $flag:path, bool) => {
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sockopt_impl!($(#[$attr])*
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$name, SetOnly, $level, $flag, bool, SetBool);
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};
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($(#[$attr:meta])* $name:ident, SetOnly, $level:expr, $flag:path, u8) => {
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sockopt_impl!($(#[$attr])* $name, SetOnly, $level, $flag, u8, SetU8);
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};
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($(#[$attr:meta])* $name:ident, SetOnly, $level:expr, $flag:path, usize) =>
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{
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sockopt_impl!($(#[$attr])*
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$name, SetOnly, $level, $flag, usize, SetUsize);
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};
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($(#[$attr:meta])* $name:ident, Both, $level:expr, $flag:path, bool) => {
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sockopt_impl!($(#[$attr])*
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$name, Both, $level, $flag, bool, GetBool, SetBool);
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};
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($(#[$attr:meta])* $name:ident, Both, $level:expr, $flag:path, u8) => {
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sockopt_impl!($(#[$attr])*
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$name, Both, $level, $flag, u8, GetU8, SetU8);
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};
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($(#[$attr:meta])* $name:ident, Both, $level:expr, $flag:path, usize) => {
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sockopt_impl!($(#[$attr])*
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$name, Both, $level, $flag, usize, GetUsize, SetUsize);
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};
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($(#[$attr:meta])* $name:ident, Both, $level:expr, $flag:path,
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OsString<$array:ty>) =>
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{
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sockopt_impl!($(#[$attr])*
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$name, Both, $level, $flag, OsString, GetOsString<$array>,
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SetOsString);
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};
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/*
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* Matchers with generic getter types must be placed at the end, so
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* they'll only match _after_ specialized matchers fail
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*/
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($(#[$attr:meta])* $name:ident, GetOnly, $level:expr, $flag:path, $ty:ty) =>
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{
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sockopt_impl!($(#[$attr])*
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$name, GetOnly, $level, $flag, $ty, GetStruct<$ty>);
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};
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($(#[$attr:meta])* $name:ident, GetOnly, $level:expr, $flag:path, $ty:ty,
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$getter:ty) =>
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{
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$(#[$attr])*
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#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
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pub struct $name;
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getsockopt_impl!($name, $level, $flag, $ty, $getter);
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};
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($(#[$attr:meta])* $name:ident, SetOnly, $level:expr, $flag:path, $ty:ty) =>
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{
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sockopt_impl!($(#[$attr])*
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$name, SetOnly, $level, $flag, $ty, SetStruct<$ty>);
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};
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($(#[$attr:meta])* $name:ident, SetOnly, $level:expr, $flag:path, $ty:ty,
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$setter:ty) =>
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{
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$(#[$attr])*
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#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
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pub struct $name;
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setsockopt_impl!($name, $level, $flag, $ty, $setter);
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};
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($(#[$attr:meta])* $name:ident, Both, $level:expr, $flag:path, $ty:ty,
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$getter:ty, $setter:ty) =>
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{
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$(#[$attr])*
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#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
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pub struct $name;
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setsockopt_impl!($name, $level, $flag, $ty, $setter);
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getsockopt_impl!($name, $level, $flag, $ty, $getter);
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};
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($(#[$attr:meta])* $name:ident, Both, $level:expr, $flag:path, $ty:ty) => {
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sockopt_impl!($(#[$attr])*
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$name, Both, $level, $flag, $ty, GetStruct<$ty>,
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SetStruct<$ty>);
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};
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}
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/*
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*
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* ===== Define sockopts =====
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*
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*/
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sockopt_impl!(
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/// Enables local address reuse
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ReuseAddr, Both, libc::SOL_SOCKET, libc::SO_REUSEADDR, bool
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);
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#[cfg(not(any(target_os = "illumos", target_os = "solaris")))]
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sockopt_impl!(
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/// Permits multiple AF_INET or AF_INET6 sockets to be bound to an
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/// identical socket address.
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ReusePort, Both, libc::SOL_SOCKET, libc::SO_REUSEPORT, bool);
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Under most circumstances, TCP sends data when it is presented; when
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/// outstanding data has not yet been acknowledged, it gathers small amounts
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/// of output to be sent in a single packet once an acknowledgement is
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/// received. For a small number of clients, such as window systems that
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/// send a stream of mouse events which receive no replies, this
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/// packetization may cause significant delays. The boolean option
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/// TCP_NODELAY defeats this algorithm.
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TcpNoDelay, Both, libc::IPPROTO_TCP, libc::TCP_NODELAY, bool);
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sockopt_impl!(
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/// When enabled, a close(2) or shutdown(2) will not return until all
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/// queued messages for the socket have been successfully sent or the
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/// linger timeout has been reached.
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Linger, Both, libc::SOL_SOCKET, libc::SO_LINGER, libc::linger);
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Join a multicast group
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IpAddMembership, SetOnly, libc::IPPROTO_IP, libc::IP_ADD_MEMBERSHIP,
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super::IpMembershipRequest);
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Leave a multicast group.
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IpDropMembership, SetOnly, libc::IPPROTO_IP, libc::IP_DROP_MEMBERSHIP,
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super::IpMembershipRequest);
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cfg_if! {
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if #[cfg(any(target_os = "android", target_os = "linux"))] {
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Join an IPv6 multicast group.
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Ipv6AddMembership, SetOnly, libc::IPPROTO_IPV6, libc::IPV6_ADD_MEMBERSHIP, super::Ipv6MembershipRequest);
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Leave an IPv6 multicast group.
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Ipv6DropMembership, SetOnly, libc::IPPROTO_IPV6, libc::IPV6_DROP_MEMBERSHIP, super::Ipv6MembershipRequest);
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} else if #[cfg(any(target_os = "dragonfly",
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target_os = "freebsd",
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target_os = "illumos",
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target_os = "ios",
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target_os = "macos",
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target_os = "netbsd",
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target_os = "openbsd",
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target_os = "solaris"))] {
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Join an IPv6 multicast group.
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Ipv6AddMembership, SetOnly, libc::IPPROTO_IPV6,
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libc::IPV6_JOIN_GROUP, super::Ipv6MembershipRequest);
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Leave an IPv6 multicast group.
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Ipv6DropMembership, SetOnly, libc::IPPROTO_IPV6,
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libc::IPV6_LEAVE_GROUP, super::Ipv6MembershipRequest);
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}
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}
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Set or read the time-to-live value of outgoing multicast packets for
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/// this socket.
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IpMulticastTtl, Both, libc::IPPROTO_IP, libc::IP_MULTICAST_TTL, u8);
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// Set or read a boolean integer argument that determines whether sent
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/// multicast packets should be looped back to the local sockets.
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IpMulticastLoop, Both, libc::IPPROTO_IP, libc::IP_MULTICAST_LOOP, bool);
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#[cfg(any(target_os = "android", target_os = "fuchsia", target_os = "linux"))]
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
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/// If enabled, this boolean option allows binding to an IP address that
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/// is nonlocal or does not (yet) exist.
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IpFreebind, Both, libc::IPPROTO_IP, libc::IP_FREEBIND, bool);
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sockopt_impl!(
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/// Specify the receiving timeout until reporting an error.
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ReceiveTimeout, Both, libc::SOL_SOCKET, libc::SO_RCVTIMEO, TimeVal);
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sockopt_impl!(
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/// Specify the sending timeout until reporting an error.
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SendTimeout, Both, libc::SOL_SOCKET, libc::SO_SNDTIMEO, TimeVal);
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sockopt_impl!(
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/// Set or get the broadcast flag.
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Broadcast, Both, libc::SOL_SOCKET, libc::SO_BROADCAST, bool);
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sockopt_impl!(
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/// If this option is enabled, out-of-band data is directly placed into
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/// the receive data stream.
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OobInline, Both, libc::SOL_SOCKET, libc::SO_OOBINLINE, bool);
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sockopt_impl!(
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/// Get and clear the pending socket error.
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SocketError, GetOnly, libc::SOL_SOCKET, libc::SO_ERROR, i32);
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sockopt_impl!(
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/// Set or get the don't route flag.
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DontRoute, Both, libc::SOL_SOCKET, libc::SO_DONTROUTE, bool);
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sockopt_impl!(
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/// Enable sending of keep-alive messages on connection-oriented sockets.
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KeepAlive, Both, libc::SOL_SOCKET, libc::SO_KEEPALIVE, bool);
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#[cfg(any(
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target_os = "dragonfly",
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target_os = "freebsd",
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target_os = "macos",
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target_os = "ios"
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))]
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sockopt_impl!(
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/// Get the credentials of the peer process of a connected unix domain
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/// socket.
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LocalPeerCred, GetOnly, 0, libc::LOCAL_PEERCRED, super::XuCred);
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#[cfg(any(target_os = "android", target_os = "linux"))]
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sockopt_impl!(
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/// Return the credentials of the foreign process connected to this socket.
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PeerCredentials, GetOnly, libc::SOL_SOCKET, libc::SO_PEERCRED, super::UnixCredentials);
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|
#[cfg(any(target_os = "ios",
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target_os = "macos"))]
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// Specify the amount of time, in seconds, that the connection must be idle
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/// before keepalive probes (if enabled) are sent.
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TcpKeepAlive, Both, libc::IPPROTO_TCP, libc::TCP_KEEPALIVE, u32);
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#[cfg(any(target_os = "android",
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target_os = "dragonfly",
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target_os = "freebsd",
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target_os = "linux"))]
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
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/// The time (in seconds) the connection needs to remain idle before TCP
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/// starts sending keepalive probes
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TcpKeepIdle, Both, libc::IPPROTO_TCP, libc::TCP_KEEPIDLE, u32);
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cfg_if! {
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if #[cfg(any(target_os = "android", target_os = "linux"))] {
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sockopt_impl!(
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/// The maximum segment size for outgoing TCP packets.
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|
TcpMaxSeg, Both, libc::IPPROTO_TCP, libc::TCP_MAXSEG, u32);
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} else {
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sockopt_impl!(
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/// The maximum segment size for outgoing TCP packets.
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TcpMaxSeg, GetOnly, libc::IPPROTO_TCP, libc::TCP_MAXSEG, u32);
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}
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}
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#[cfg(not(any(target_os = "openbsd", target_os = "haiku")))]
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#[cfg(feature = "net")]
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sockopt_impl!(
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#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// The maximum number of keepalive probes TCP should send before
|
|
/// dropping the connection.
|
|
TcpKeepCount, Both, libc::IPPROTO_TCP, libc::TCP_KEEPCNT, u32);
|
|
#[cfg(any(target_os = "android",
|
|
target_os = "fuchsia",
|
|
target_os = "linux"))]
|
|
sockopt_impl!(
|
|
#[allow(missing_docs)]
|
|
// Not documented by Linux!
|
|
TcpRepair, Both, libc::IPPROTO_TCP, libc::TCP_REPAIR, u32);
|
|
#[cfg(not(any(target_os = "openbsd", target_os = "haiku")))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// The time (in seconds) between individual keepalive probes.
|
|
TcpKeepInterval, Both, libc::IPPROTO_TCP, libc::TCP_KEEPINTVL, u32);
|
|
#[cfg(any(target_os = "fuchsia", target_os = "linux"))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// Specifies the maximum amount of time in milliseconds that transmitted
|
|
/// data may remain unacknowledged before TCP will forcibly close the
|
|
/// corresponding connection
|
|
TcpUserTimeout, Both, libc::IPPROTO_TCP, libc::TCP_USER_TIMEOUT, u32);
|
|
sockopt_impl!(
|
|
/// Sets or gets the maximum socket receive buffer in bytes.
|
|
RcvBuf, Both, libc::SOL_SOCKET, libc::SO_RCVBUF, usize);
|
|
sockopt_impl!(
|
|
/// Sets or gets the maximum socket send buffer in bytes.
|
|
SndBuf, Both, libc::SOL_SOCKET, libc::SO_SNDBUF, usize);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Using this socket option, a privileged (`CAP_NET_ADMIN`) process can
|
|
/// perform the same task as `SO_RCVBUF`, but the `rmem_max limit` can be
|
|
/// overridden.
|
|
RcvBufForce, SetOnly, libc::SOL_SOCKET, libc::SO_RCVBUFFORCE, usize);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Using this socket option, a privileged (`CAP_NET_ADMIN`) process can
|
|
/// perform the same task as `SO_SNDBUF`, but the `wmem_max` limit can be
|
|
/// overridden.
|
|
SndBufForce, SetOnly, libc::SOL_SOCKET, libc::SO_SNDBUFFORCE, usize);
|
|
sockopt_impl!(
|
|
/// Gets the socket type as an integer.
|
|
SockType, GetOnly, libc::SOL_SOCKET, libc::SO_TYPE, super::SockType);
|
|
sockopt_impl!(
|
|
/// Returns a value indicating whether or not this socket has been marked to
|
|
/// accept connections with `listen(2)`.
|
|
AcceptConn, GetOnly, libc::SOL_SOCKET, libc::SO_ACCEPTCONN, bool);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Bind this socket to a particular device like “eth0”.
|
|
BindToDevice, Both, libc::SOL_SOCKET, libc::SO_BINDTODEVICE, OsString<[u8; libc::IFNAMSIZ]>);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
#[allow(missing_docs)]
|
|
// Not documented by Linux!
|
|
OriginalDst, GetOnly, libc::SOL_IP, libc::SO_ORIGINAL_DST, libc::sockaddr_in);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
#[allow(missing_docs)]
|
|
// Not documented by Linux!
|
|
Ip6tOriginalDst, GetOnly, libc::SOL_IPV6, libc::IP6T_SO_ORIGINAL_DST, libc::sockaddr_in6);
|
|
#[cfg(any(target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Specifies exact type of timestamping information collected by the kernel
|
|
/// [Further reading](https://www.kernel.org/doc/html/latest/networking/timestamping.html)
|
|
Timestamping, Both, libc::SOL_SOCKET, libc::SO_TIMESTAMPING, super::TimestampingFlag);
|
|
#[cfg(not(target_os = "haiku"))]
|
|
sockopt_impl!(
|
|
/// Enable or disable the receiving of the `SO_TIMESTAMP` control message.
|
|
ReceiveTimestamp, Both, libc::SOL_SOCKET, libc::SO_TIMESTAMP, bool);
|
|
#[cfg(all(target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Enable or disable the receiving of the `SO_TIMESTAMPNS` control message.
|
|
ReceiveTimestampns, Both, libc::SOL_SOCKET, libc::SO_TIMESTAMPNS, bool);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// Setting this boolean option enables transparent proxying on this socket.
|
|
IpTransparent, Both, libc::SOL_IP, libc::IP_TRANSPARENT, bool);
|
|
#[cfg(target_os = "openbsd")]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// Allows the socket to be bound to addresses which are not local to the
|
|
/// machine, so it can be used to make a transparent proxy.
|
|
BindAny, Both, libc::SOL_SOCKET, libc::SO_BINDANY, bool);
|
|
#[cfg(target_os = "freebsd")]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// Can `bind(2)` to any address, even one not bound to any available
|
|
/// network interface in the system.
|
|
BindAny, Both, libc::IPPROTO_IP, libc::IP_BINDANY, bool);
|
|
#[cfg(target_os = "linux")]
|
|
sockopt_impl!(
|
|
/// Set the mark for each packet sent through this socket (similar to the
|
|
/// netfilter MARK target but socket-based).
|
|
Mark, Both, libc::SOL_SOCKET, libc::SO_MARK, u32);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Enable or disable the receiving of the `SCM_CREDENTIALS` control
|
|
/// message.
|
|
PassCred, Both, libc::SOL_SOCKET, libc::SO_PASSCRED, bool);
|
|
#[cfg(any(target_os = "freebsd", target_os = "linux"))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// This option allows the caller to set the TCP congestion control
|
|
/// algorithm to be used, on a per-socket basis.
|
|
TcpCongestion, Both, libc::IPPROTO_TCP, libc::TCP_CONGESTION, OsString<[u8; TCP_CA_NAME_MAX]>);
|
|
#[cfg(any(
|
|
target_os = "android",
|
|
target_os = "ios",
|
|
target_os = "linux",
|
|
target_os = "macos",
|
|
target_os = "netbsd",
|
|
))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// Pass an `IP_PKTINFO` ancillary message that contains a pktinfo
|
|
/// structure that supplies some information about the incoming packet.
|
|
Ipv4PacketInfo, Both, libc::IPPROTO_IP, libc::IP_PKTINFO, bool);
|
|
#[cfg(any(
|
|
target_os = "android",
|
|
target_os = "freebsd",
|
|
target_os = "ios",
|
|
target_os = "linux",
|
|
target_os = "macos",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// Set delivery of the `IPV6_PKTINFO` control message on incoming
|
|
/// datagrams.
|
|
Ipv6RecvPacketInfo, Both, libc::IPPROTO_IPV6, libc::IPV6_RECVPKTINFO, bool);
|
|
#[cfg(any(
|
|
target_os = "freebsd",
|
|
target_os = "ios",
|
|
target_os = "macos",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// The `recvmsg(2)` call returns a `struct sockaddr_dl` corresponding to
|
|
/// the interface on which the packet was received.
|
|
Ipv4RecvIf, Both, libc::IPPROTO_IP, libc::IP_RECVIF, bool);
|
|
#[cfg(any(
|
|
target_os = "freebsd",
|
|
target_os = "ios",
|
|
target_os = "macos",
|
|
target_os = "netbsd",
|
|
target_os = "openbsd",
|
|
))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// The `recvmsg(2)` call will return the destination IP address for a UDP
|
|
/// datagram.
|
|
Ipv4RecvDstAddr, Both, libc::IPPROTO_IP, libc::IP_RECVDSTADDR, bool);
|
|
#[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// The `recvmsg(2)` call will return the destination IP address for a UDP
|
|
/// datagram.
|
|
Ipv4OrigDstAddr, Both, libc::IPPROTO_IP, libc::IP_ORIGDSTADDR, bool);
|
|
#[cfg(target_os = "linux")]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
#[allow(missing_docs)]
|
|
// Not documented by Linux!
|
|
UdpGsoSegment, Both, libc::SOL_UDP, libc::UDP_SEGMENT, libc::c_int);
|
|
#[cfg(target_os = "linux")]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
#[allow(missing_docs)]
|
|
// Not documented by Linux!
|
|
UdpGroSegment, Both, libc::IPPROTO_UDP, libc::UDP_GRO, bool);
|
|
#[cfg(target_os = "linux")]
|
|
sockopt_impl!(
|
|
/// Configures the behavior of time-based transmission of packets, for use
|
|
/// with the `TxTime` control message.
|
|
TxTime, Both, libc::SOL_SOCKET, libc::SO_TXTIME, libc::sock_txtime);
|
|
#[cfg(any(target_os = "android", target_os = "fuchsia", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Indicates that an unsigned 32-bit value ancillary message (cmsg) should
|
|
/// be attached to received skbs indicating the number of packets dropped by
|
|
/// the socket since its creation.
|
|
RxqOvfl, Both, libc::SOL_SOCKET, libc::SO_RXQ_OVFL, libc::c_int);
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// The socket is restricted to sending and receiving IPv6 packets only.
|
|
Ipv6V6Only, Both, libc::IPPROTO_IPV6, libc::IPV6_V6ONLY, bool);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Enable extended reliable error message passing.
|
|
Ipv4RecvErr, Both, libc::IPPROTO_IP, libc::IP_RECVERR, bool);
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Control receiving of asynchronous error options.
|
|
Ipv6RecvErr, Both, libc::IPPROTO_IPV6, libc::IPV6_RECVERR, bool);
|
|
#[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Set or retrieve the current time-to-live field that is used in every
|
|
/// packet sent from this socket.
|
|
Ipv4Ttl, Both, libc::IPPROTO_IP, libc::IP_TTL, libc::c_int);
|
|
#[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))]
|
|
sockopt_impl!(
|
|
/// Set the unicast hop limit for the socket.
|
|
Ipv6Ttl, Both, libc::IPPROTO_IPV6, libc::IPV6_UNICAST_HOPS, libc::c_int);
|
|
#[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))]
|
|
#[cfg(feature = "net")]
|
|
sockopt_impl!(
|
|
#[cfg_attr(docsrs, doc(cfg(feature = "net")))]
|
|
/// The `recvmsg(2)` call will return the destination IP address for a UDP
|
|
/// datagram.
|
|
Ipv6OrigDstAddr, Both, libc::IPPROTO_IPV6, libc::IPV6_ORIGDSTADDR, bool);
|
|
#[cfg(any(target_os = "ios", target_os = "macos"))]
|
|
sockopt_impl!(
|
|
/// Set "don't fragment packet" flag on the IP packet.
|
|
IpDontFrag, Both, libc::IPPROTO_IP, libc::IP_DONTFRAG, bool);
|
|
#[cfg(any(
|
|
target_os = "android",
|
|
target_os = "ios",
|
|
target_os = "linux",
|
|
target_os = "macos",
|
|
))]
|
|
sockopt_impl!(
|
|
/// Set "don't fragment packet" flag on the IPv6 packet.
|
|
Ipv6DontFrag, Both, libc::IPPROTO_IPV6, libc::IPV6_DONTFRAG, bool);
|
|
|
|
#[allow(missing_docs)]
|
|
// Not documented by Linux!
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
#[derive(Copy, Clone, Debug)]
|
|
pub struct AlgSetAeadAuthSize;
|
|
|
|
// ALG_SET_AEAD_AUTH_SIZE read the length from passed `option_len`
|
|
// See https://elixir.bootlin.com/linux/v4.4/source/crypto/af_alg.c#L222
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
impl SetSockOpt for AlgSetAeadAuthSize {
|
|
type Val = usize;
|
|
|
|
fn set(&self, fd: RawFd, val: &usize) -> Result<()> {
|
|
unsafe {
|
|
let res = libc::setsockopt(fd,
|
|
libc::SOL_ALG,
|
|
libc::ALG_SET_AEAD_AUTHSIZE,
|
|
::std::ptr::null(),
|
|
*val as libc::socklen_t);
|
|
Errno::result(res).map(drop)
|
|
}
|
|
}
|
|
}
|
|
|
|
#[allow(missing_docs)]
|
|
// Not documented by Linux!
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
#[derive(Clone, Debug)]
|
|
pub struct AlgSetKey<T>(::std::marker::PhantomData<T>);
|
|
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
impl<T> Default for AlgSetKey<T> {
|
|
fn default() -> Self {
|
|
AlgSetKey(Default::default())
|
|
}
|
|
}
|
|
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
impl<T> SetSockOpt for AlgSetKey<T> where T: AsRef<[u8]> + Clone {
|
|
type Val = T;
|
|
|
|
fn set(&self, fd: RawFd, val: &T) -> Result<()> {
|
|
unsafe {
|
|
let res = libc::setsockopt(fd,
|
|
libc::SOL_ALG,
|
|
libc::ALG_SET_KEY,
|
|
val.as_ref().as_ptr() as *const _,
|
|
val.as_ref().len() as libc::socklen_t);
|
|
Errno::result(res).map(drop)
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
*
|
|
* ===== Accessor helpers =====
|
|
*
|
|
*/
|
|
|
|
/// Helper trait that describes what is expected from a `GetSockOpt` getter.
|
|
trait Get<T> {
|
|
/// Returns an uninitialized value.
|
|
fn uninit() -> Self;
|
|
/// Returns a pointer to the stored value. This pointer will be passed to the system's
|
|
/// `getsockopt` call (`man 3p getsockopt`, argument `option_value`).
|
|
fn ffi_ptr(&mut self) -> *mut c_void;
|
|
/// Returns length of the stored value. This pointer will be passed to the system's
|
|
/// `getsockopt` call (`man 3p getsockopt`, argument `option_len`).
|
|
fn ffi_len(&mut self) -> *mut socklen_t;
|
|
/// Returns the hopefully initialized inner value.
|
|
unsafe fn assume_init(self) -> T;
|
|
}
|
|
|
|
/// Helper trait that describes what is expected from a `SetSockOpt` setter.
|
|
trait Set<'a, T> {
|
|
/// Initialize the setter with a given value.
|
|
fn new(val: &'a T) -> Self;
|
|
/// Returns a pointer to the stored value. This pointer will be passed to the system's
|
|
/// `setsockopt` call (`man 3p setsockopt`, argument `option_value`).
|
|
fn ffi_ptr(&self) -> *const c_void;
|
|
/// Returns length of the stored value. This pointer will be passed to the system's
|
|
/// `setsockopt` call (`man 3p setsockopt`, argument `option_len`).
|
|
fn ffi_len(&self) -> socklen_t;
|
|
}
|
|
|
|
/// Getter for an arbitrary `struct`.
|
|
struct GetStruct<T> {
|
|
len: socklen_t,
|
|
val: MaybeUninit<T>,
|
|
}
|
|
|
|
impl<T> Get<T> for GetStruct<T> {
|
|
fn uninit() -> Self {
|
|
GetStruct {
|
|
len: mem::size_of::<T>() as socklen_t,
|
|
val: MaybeUninit::uninit(),
|
|
}
|
|
}
|
|
|
|
fn ffi_ptr(&mut self) -> *mut c_void {
|
|
self.val.as_mut_ptr() as *mut c_void
|
|
}
|
|
|
|
fn ffi_len(&mut self) -> *mut socklen_t {
|
|
&mut self.len
|
|
}
|
|
|
|
unsafe fn assume_init(self) -> T {
|
|
assert_eq!(self.len as usize, mem::size_of::<T>(), "invalid getsockopt implementation");
|
|
self.val.assume_init()
|
|
}
|
|
}
|
|
|
|
/// Setter for an arbitrary `struct`.
|
|
struct SetStruct<'a, T: 'static> {
|
|
ptr: &'a T,
|
|
}
|
|
|
|
impl<'a, T> Set<'a, T> for SetStruct<'a, T> {
|
|
fn new(ptr: &'a T) -> SetStruct<'a, T> {
|
|
SetStruct { ptr }
|
|
}
|
|
|
|
fn ffi_ptr(&self) -> *const c_void {
|
|
self.ptr as *const T as *const c_void
|
|
}
|
|
|
|
fn ffi_len(&self) -> socklen_t {
|
|
mem::size_of::<T>() as socklen_t
|
|
}
|
|
}
|
|
|
|
/// Getter for a boolean value.
|
|
struct GetBool {
|
|
len: socklen_t,
|
|
val: MaybeUninit<c_int>,
|
|
}
|
|
|
|
impl Get<bool> for GetBool {
|
|
fn uninit() -> Self {
|
|
GetBool {
|
|
len: mem::size_of::<c_int>() as socklen_t,
|
|
val: MaybeUninit::uninit(),
|
|
}
|
|
}
|
|
|
|
fn ffi_ptr(&mut self) -> *mut c_void {
|
|
self.val.as_mut_ptr() as *mut c_void
|
|
}
|
|
|
|
fn ffi_len(&mut self) -> *mut socklen_t {
|
|
&mut self.len
|
|
}
|
|
|
|
unsafe fn assume_init(self) -> bool {
|
|
assert_eq!(self.len as usize, mem::size_of::<c_int>(), "invalid getsockopt implementation");
|
|
self.val.assume_init() != 0
|
|
}
|
|
}
|
|
|
|
/// Setter for a boolean value.
|
|
struct SetBool {
|
|
val: c_int,
|
|
}
|
|
|
|
impl<'a> Set<'a, bool> for SetBool {
|
|
fn new(val: &'a bool) -> SetBool {
|
|
SetBool { val: if *val { 1 } else { 0 } }
|
|
}
|
|
|
|
fn ffi_ptr(&self) -> *const c_void {
|
|
&self.val as *const c_int as *const c_void
|
|
}
|
|
|
|
fn ffi_len(&self) -> socklen_t {
|
|
mem::size_of::<c_int>() as socklen_t
|
|
}
|
|
}
|
|
|
|
/// Getter for an `u8` value.
|
|
struct GetU8 {
|
|
len: socklen_t,
|
|
val: MaybeUninit<u8>,
|
|
}
|
|
|
|
impl Get<u8> for GetU8 {
|
|
fn uninit() -> Self {
|
|
GetU8 {
|
|
len: mem::size_of::<u8>() as socklen_t,
|
|
val: MaybeUninit::uninit(),
|
|
}
|
|
}
|
|
|
|
fn ffi_ptr(&mut self) -> *mut c_void {
|
|
self.val.as_mut_ptr() as *mut c_void
|
|
}
|
|
|
|
fn ffi_len(&mut self) -> *mut socklen_t {
|
|
&mut self.len
|
|
}
|
|
|
|
unsafe fn assume_init(self) -> u8 {
|
|
assert_eq!(self.len as usize, mem::size_of::<u8>(), "invalid getsockopt implementation");
|
|
self.val.assume_init()
|
|
}
|
|
}
|
|
|
|
/// Setter for an `u8` value.
|
|
struct SetU8 {
|
|
val: u8,
|
|
}
|
|
|
|
impl<'a> Set<'a, u8> for SetU8 {
|
|
fn new(val: &'a u8) -> SetU8 {
|
|
SetU8 { val: *val as u8 }
|
|
}
|
|
|
|
fn ffi_ptr(&self) -> *const c_void {
|
|
&self.val as *const u8 as *const c_void
|
|
}
|
|
|
|
fn ffi_len(&self) -> socklen_t {
|
|
mem::size_of::<c_int>() as socklen_t
|
|
}
|
|
}
|
|
|
|
/// Getter for an `usize` value.
|
|
struct GetUsize {
|
|
len: socklen_t,
|
|
val: MaybeUninit<c_int>,
|
|
}
|
|
|
|
impl Get<usize> for GetUsize {
|
|
fn uninit() -> Self {
|
|
GetUsize {
|
|
len: mem::size_of::<c_int>() as socklen_t,
|
|
val: MaybeUninit::uninit(),
|
|
}
|
|
}
|
|
|
|
fn ffi_ptr(&mut self) -> *mut c_void {
|
|
self.val.as_mut_ptr() as *mut c_void
|
|
}
|
|
|
|
fn ffi_len(&mut self) -> *mut socklen_t {
|
|
&mut self.len
|
|
}
|
|
|
|
unsafe fn assume_init(self) -> usize {
|
|
assert_eq!(self.len as usize, mem::size_of::<c_int>(), "invalid getsockopt implementation");
|
|
self.val.assume_init() as usize
|
|
}
|
|
}
|
|
|
|
/// Setter for an `usize` value.
|
|
struct SetUsize {
|
|
val: c_int,
|
|
}
|
|
|
|
impl<'a> Set<'a, usize> for SetUsize {
|
|
fn new(val: &'a usize) -> SetUsize {
|
|
SetUsize { val: *val as c_int }
|
|
}
|
|
|
|
fn ffi_ptr(&self) -> *const c_void {
|
|
&self.val as *const c_int as *const c_void
|
|
}
|
|
|
|
fn ffi_len(&self) -> socklen_t {
|
|
mem::size_of::<c_int>() as socklen_t
|
|
}
|
|
}
|
|
|
|
/// Getter for a `OsString` value.
|
|
struct GetOsString<T: AsMut<[u8]>> {
|
|
len: socklen_t,
|
|
val: MaybeUninit<T>,
|
|
}
|
|
|
|
impl<T: AsMut<[u8]>> Get<OsString> for GetOsString<T> {
|
|
fn uninit() -> Self {
|
|
GetOsString {
|
|
len: mem::size_of::<T>() as socklen_t,
|
|
val: MaybeUninit::uninit(),
|
|
}
|
|
}
|
|
|
|
fn ffi_ptr(&mut self) -> *mut c_void {
|
|
self.val.as_mut_ptr() as *mut c_void
|
|
}
|
|
|
|
fn ffi_len(&mut self) -> *mut socklen_t {
|
|
&mut self.len
|
|
}
|
|
|
|
unsafe fn assume_init(self) -> OsString {
|
|
let len = self.len as usize;
|
|
let mut v = self.val.assume_init();
|
|
OsStr::from_bytes(&v.as_mut()[0..len]).to_owned()
|
|
}
|
|
}
|
|
|
|
/// Setter for a `OsString` value.
|
|
struct SetOsString<'a> {
|
|
val: &'a OsStr,
|
|
}
|
|
|
|
impl<'a> Set<'a, OsString> for SetOsString<'a> {
|
|
fn new(val: &'a OsString) -> SetOsString {
|
|
SetOsString { val: val.as_os_str() }
|
|
}
|
|
|
|
fn ffi_ptr(&self) -> *const c_void {
|
|
self.val.as_bytes().as_ptr() as *const c_void
|
|
}
|
|
|
|
fn ffi_len(&self) -> socklen_t {
|
|
self.val.len() as socklen_t
|
|
}
|
|
}
|
|
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
#[cfg(any(target_os = "android", target_os = "linux"))]
|
|
#[test]
|
|
fn can_get_peercred_on_unix_socket() {
|
|
use super::super::*;
|
|
|
|
let (a, b) = socketpair(AddressFamily::Unix, SockType::Stream, None, SockFlag::empty()).unwrap();
|
|
let a_cred = getsockopt(a, super::PeerCredentials).unwrap();
|
|
let b_cred = getsockopt(b, super::PeerCredentials).unwrap();
|
|
assert_eq!(a_cred, b_cred);
|
|
assert!(a_cred.pid() != 0);
|
|
}
|
|
|
|
#[test]
|
|
fn is_socket_type_unix() {
|
|
use super::super::*;
|
|
use crate::unistd::close;
|
|
|
|
let (a, b) = socketpair(AddressFamily::Unix, SockType::Stream, None, SockFlag::empty()).unwrap();
|
|
let a_type = getsockopt(a, super::SockType).unwrap();
|
|
assert_eq!(a_type, SockType::Stream);
|
|
close(a).unwrap();
|
|
close(b).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn is_socket_type_dgram() {
|
|
use super::super::*;
|
|
use crate::unistd::close;
|
|
|
|
let s = socket(AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None).unwrap();
|
|
let s_type = getsockopt(s, super::SockType).unwrap();
|
|
assert_eq!(s_type, SockType::Datagram);
|
|
close(s).unwrap();
|
|
}
|
|
|
|
#[cfg(any(target_os = "freebsd",
|
|
target_os = "linux"))]
|
|
#[test]
|
|
fn can_get_listen_on_tcp_socket() {
|
|
use super::super::*;
|
|
use crate::unistd::close;
|
|
|
|
let s = socket(AddressFamily::Inet, SockType::Stream, SockFlag::empty(), None).unwrap();
|
|
let s_listening = getsockopt(s, super::AcceptConn).unwrap();
|
|
assert!(!s_listening);
|
|
listen(s, 10).unwrap();
|
|
let s_listening2 = getsockopt(s, super::AcceptConn).unwrap();
|
|
assert!(s_listening2);
|
|
close(s).unwrap();
|
|
}
|
|
|
|
}
|