// Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![allow(bad_style, dead_code)] use std::io; use std::mem; use std::net::{TcpStream, TcpListener, UdpSocket, Ipv4Addr, Ipv6Addr}; use std::net::ToSocketAddrs; use {TcpBuilder, UdpBuilder, FromInner}; use sys; use sys::c; use socket; cfg_if! { if #[cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "haiku", target_os = "ios", target_os = "macos", target_os = "netbsd", target_os = "openbsd", target_os = "solaris", target_os = "illumos", target_env = "uclibc"))] { use libc::IPV6_JOIN_GROUP as IPV6_ADD_MEMBERSHIP; use libc::IPV6_LEAVE_GROUP as IPV6_DROP_MEMBERSHIP; } else { // ... } } use std::time::Duration; #[cfg(any(unix, target_os = "wasi"))] use libc::*; #[cfg(any(unix))] use std::os::unix::prelude::*; #[cfg(target_os = "wasi")] use std::os::wasi::prelude::*; #[cfg(unix)] pub type Socket = c_int; #[cfg(target_os = "wasi")] pub type Socket = std::os::wasi::io::RawFd; #[cfg(windows)] pub type Socket = SOCKET; #[cfg(windows)] use std::os::windows::prelude::*; #[cfg(any(windows, target_os = "wasi"))] use sys::c::*; #[cfg(windows)] const SIO_KEEPALIVE_VALS: DWORD = 0x98000004; #[cfg(windows)] #[repr(C)] struct tcp_keepalive { onoff: c_ulong, keepalivetime: c_ulong, keepaliveinterval: c_ulong, } #[cfg(any(unix, target_os = "wasi"))] fn v(opt: c_int) -> c_int { opt } #[cfg(windows)] fn v(opt: IPPROTO) -> c_int { opt as c_int } #[cfg(target_os = "wasi")] pub fn set_opt(_sock: Socket, _opt: c_int, _val: c_int, _payload: T) -> io::Result<()> { Ok(()) } #[cfg(not(target_os = "wasi"))] pub fn set_opt(sock: Socket, opt: c_int, val: c_int, payload: T) -> io::Result<()> { unsafe { let payload = &payload as *const T as *const c_void; try!(::cvt(setsockopt(sock, opt, val, payload as *const _, mem::size_of::() as socklen_t))); } Ok(()) } #[cfg(target_os = "wasi")] pub fn get_opt(_sock: Socket, _opt: c_int, _val: c_int) -> io::Result { unimplemented!() } #[cfg(not(target_os = "wasi"))] pub fn get_opt(sock: Socket, opt: c_int, val: c_int) -> io::Result { unsafe { let mut slot: T = mem::zeroed(); let mut len = mem::size_of::() as socklen_t; try!(::cvt(getsockopt(sock, opt, val, &mut slot as *mut _ as *mut _, &mut len))); assert_eq!(len as usize, mem::size_of::()); Ok(slot) } } /// Extension methods for the standard [`TcpStream` type][link] in `std::net`. /// /// [link]: https://doc.rust-lang.org/std/net/struct.TcpStream.html pub trait TcpStreamExt { /// Sets the value of the `TCP_NODELAY` option on this socket. /// /// If set, this option disables the Nagle algorithm. This means that /// segments are always sent as soon as possible, even if there is only a /// small amount of data. When not set, data is buffered until there is a /// sufficient amount to send out, thereby avoiding the frequent sending of /// small packets. fn set_nodelay(&self, nodelay: bool) -> io::Result<()>; /// Gets the value of the `TCP_NODELAY` option on this socket. /// /// For more information about this option, see [`set_nodelay`][link]. /// /// [link]: #tymethod.set_nodelay fn nodelay(&self) -> io::Result; /// Sets the value of the `SO_RCVBUF` option on this socket. /// /// Changes the size of the operating system's receive buffer associated with the socket. fn set_recv_buffer_size(&self, size: usize) -> io::Result<()>; /// Gets the value of the `SO_RCVBUF` option on this socket. /// /// For more information about this option, see [`set_recv_buffer_size`][link]. /// /// [link]: #tymethod.set_recv_buffer_size fn recv_buffer_size(&self) -> io::Result; /// Sets the value of the `SO_SNDBUF` option on this socket. /// /// Changes the size of the operating system's send buffer associated with the socket. fn set_send_buffer_size(&self, size: usize) -> io::Result<()>; /// Gets the value of the `SO_SNDBUF` option on this socket. /// /// For more information about this option, see [`set_send_buffer`][link]. /// /// [link]: #tymethod.set_send_buffer fn send_buffer_size(&self) -> io::Result; /// Sets whether keepalive messages are enabled to be sent on this socket. /// /// On Unix, this option will set the `SO_KEEPALIVE` as well as the /// `TCP_KEEPALIVE` or `TCP_KEEPIDLE` option (depending on your platform). /// On Windows, this will set the `SIO_KEEPALIVE_VALS` option. /// /// If `None` is specified then keepalive messages are disabled, otherwise /// the number of milliseconds specified will be the time to remain idle /// before sending a TCP keepalive probe. /// /// Some platforms specify this value in seconds, so sub-second millisecond /// specifications may be omitted. fn set_keepalive_ms(&self, keepalive: Option) -> io::Result<()>; /// Returns whether keepalive messages are enabled on this socket, and if so /// the amount of milliseconds between them. /// /// For more information about this option, see [`set_keepalive_ms`][link]. /// /// [link]: #tymethod.set_keepalive_ms fn keepalive_ms(&self) -> io::Result>; /// Sets whether keepalive messages are enabled to be sent on this socket. /// /// On Unix, this option will set the `SO_KEEPALIVE` as well as the /// `TCP_KEEPALIVE` or `TCP_KEEPIDLE` option (depending on your platform). /// On Windows, this will set the `SIO_KEEPALIVE_VALS` option. /// /// If `None` is specified then keepalive messages are disabled, otherwise /// the duration specified will be the time to remain idle before sending a /// TCP keepalive probe. /// /// Some platforms specify this value in seconds, so sub-second /// specifications may be omitted. fn set_keepalive(&self, keepalive: Option) -> io::Result<()>; /// Returns whether keepalive messages are enabled on this socket, and if so /// the duration of time between them. /// /// For more information about this option, see [`set_keepalive`][link]. /// /// [link]: #tymethod.set_keepalive fn keepalive(&self) -> io::Result>; /// Sets the `SO_RCVTIMEO` option for this socket. /// /// This option specifies the timeout, in milliseconds, of how long calls to /// this socket's `read` function will wait before returning a timeout. A /// value of `None` means that no read timeout should be specified and /// otherwise `Some` indicates the number of milliseconds for the timeout. fn set_read_timeout_ms(&self, val: Option) -> io::Result<()>; /// Sets the `SO_RCVTIMEO` option for this socket. /// /// This option specifies the timeout of how long calls to this socket's /// `read` function will wait before returning a timeout. A value of `None` /// means that no read timeout should be specified and otherwise `Some` /// indicates the number of duration of the timeout. fn set_read_timeout(&self, val: Option) -> io::Result<()>; /// Gets the value of the `SO_RCVTIMEO` option for this socket. /// /// For more information about this option, see [`set_read_timeout_ms`][link]. /// /// [link]: #tymethod.set_read_timeout_ms fn read_timeout_ms(&self) -> io::Result>; /// Gets the value of the `SO_RCVTIMEO` option for this socket. /// /// For more information about this option, see [`set_read_timeout`][link]. /// /// [link]: #tymethod.set_read_timeout fn read_timeout(&self) -> io::Result>; /// Sets the `SO_SNDTIMEO` option for this socket. /// /// This option specifies the timeout, in milliseconds, of how long calls to /// this socket's `write` function will wait before returning a timeout. A /// value of `None` means that no read timeout should be specified and /// otherwise `Some` indicates the number of milliseconds for the timeout. fn set_write_timeout_ms(&self, val: Option) -> io::Result<()>; /// Sets the `SO_SNDTIMEO` option for this socket. /// /// This option specifies the timeout of how long calls to this socket's /// `write` function will wait before returning a timeout. A value of `None` /// means that no read timeout should be specified and otherwise `Some` /// indicates the duration of the timeout. fn set_write_timeout(&self, val: Option) -> io::Result<()>; /// Gets the value of the `SO_SNDTIMEO` option for this socket. /// /// For more information about this option, see [`set_write_timeout_ms`][link]. /// /// [link]: #tymethod.set_write_timeout_ms fn write_timeout_ms(&self) -> io::Result>; /// Gets the value of the `SO_SNDTIMEO` option for this socket. /// /// For more information about this option, see [`set_write_timeout`][link]. /// /// [link]: #tymethod.set_write_timeout fn write_timeout(&self) -> io::Result>; /// Sets the value for the `IP_TTL` option on this socket. /// /// This value sets the time-to-live field that is used in every packet sent /// from this socket. fn set_ttl(&self, ttl: u32) -> io::Result<()>; /// Gets the value of the `IP_TTL` option for this socket. /// /// For more information about this option, see [`set_ttl`][link]. /// /// [link]: #tymethod.set_ttl fn ttl(&self) -> io::Result; /// Sets the value for the `IPV6_V6ONLY` option on this socket. /// /// If this is set to `true` then the socket is restricted to sending and /// receiving IPv6 packets only. In this case two IPv4 and IPv6 applications /// can bind the same port at the same time. /// /// If this is set to `false` then the socket can be used to send and /// receive packets from an IPv4-mapped IPv6 address. fn set_only_v6(&self, only_v6: bool) -> io::Result<()>; /// Gets the value of the `IPV6_V6ONLY` option for this socket. /// /// For more information about this option, see [`set_only_v6`][link]. /// /// [link]: #tymethod.set_only_v6 fn only_v6(&self) -> io::Result; /// Executes a `connect` operation on this socket, establishing a connection /// to the host specified by `addr`. /// /// Note that this normally does not need to be called on a `TcpStream`, /// it's typically automatically done as part of a normal /// `TcpStream::connect` function call or `TcpBuilder::connect` method call. /// /// This should only be necessary if an unconnected socket was extracted /// from a `TcpBuilder` and then needs to be connected. fn connect(&self, addr: T) -> io::Result<()>; /// Get the value of the `SO_ERROR` option on this socket. /// /// This will retrieve the stored error in the underlying socket, clearing /// the field in the process. This can be useful for checking errors between /// calls. fn take_error(&self) -> io::Result>; /// Moves this TCP stream into or out of nonblocking mode. /// /// On Unix this corresponds to calling fcntl, and on Windows this /// corresponds to calling ioctlsocket. fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()>; /// Sets the linger duration of this socket by setting the SO_LINGER option fn set_linger(&self, dur: Option) -> io::Result<()>; /// reads the linger duration for this socket by getting the SO_LINGER option fn linger(&self) -> io::Result>; } /// Extension methods for the standard [`TcpListener` type][link] in `std::net`. /// /// [link]: https://doc.rust-lang.org/std/net/struct.TcpListener.html pub trait TcpListenerExt { /// Sets the value for the `IP_TTL` option on this socket. /// /// This is the same as [`TcpStreamExt::set_ttl`][other]. /// /// [other]: trait.TcpStreamExt.html#tymethod.set_ttl fn set_ttl(&self, ttl: u32) -> io::Result<()>; /// Gets the value of the `IP_TTL` option for this socket. /// /// For more information about this option, see /// [`TcpStreamExt::set_ttl`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_ttl fn ttl(&self) -> io::Result; /// Sets the value for the `IPV6_V6ONLY` option on this socket. /// /// For more information about this option, see /// [`TcpStreamExt::set_only_v6`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_only_v6 fn set_only_v6(&self, only_v6: bool) -> io::Result<()>; /// Gets the value of the `IPV6_V6ONLY` option for this socket. /// /// For more information about this option, see /// [`TcpStreamExt::set_only_v6`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_only_v6 fn only_v6(&self) -> io::Result; /// Get the value of the `SO_ERROR` option on this socket. /// /// This will retrieve the stored error in the underlying socket, clearing /// the field in the process. This can be useful for checking errors between /// calls. fn take_error(&self) -> io::Result>; /// Moves this TCP listener into or out of nonblocking mode. /// /// For more information about this option, see /// [`TcpStreamExt::set_nonblocking`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_nonblocking fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()>; /// Sets the linger duration of this socket by setting the SO_LINGER option fn set_linger(&self, dur: Option) -> io::Result<()>; /// reads the linger duration for this socket by getting the SO_LINGER option fn linger(&self) -> io::Result>; } /// Extension methods for the standard [`UdpSocket` type][link] in `std::net`. /// /// [link]: https://doc.rust-lang.org/std/net/struct.UdpSocket.html pub trait UdpSocketExt { /// Sets the value of the `SO_RCVBUF` option on this socket. /// /// Changes the size of the operating system's receive buffer associated with the socket. fn set_recv_buffer_size(&self, size: usize) -> io::Result<()>; /// Gets the value of the `SO_RCVBUF` option on this socket. /// /// For more information about this option, see [`set_recv_buffer_size`][link]. /// /// [link]: #tymethod.set_recv_buffer_size fn recv_buffer_size(&self) -> io::Result; /// Sets the value of the `SO_SNDBUF` option on this socket. /// /// Changes the size of the operating system's send buffer associated with the socket. fn set_send_buffer_size(&self, size: usize) -> io::Result<()>; /// Gets the value of the `SO_SNDBUF` option on this socket. /// /// For more information about this option, see [`set_send_buffer`][link]. /// /// [link]: #tymethod.set_send_buffer fn send_buffer_size(&self) -> io::Result; /// Sets the value of the `SO_BROADCAST` option for this socket. /// /// When enabled, this socket is allowed to send packets to a broadcast /// address. fn set_broadcast(&self, broadcast: bool) -> io::Result<()>; /// Gets the value of the `SO_BROADCAST` option for this socket. /// /// For more information about this option, see /// [`set_broadcast`][link]. /// /// [link]: #tymethod.set_broadcast fn broadcast(&self) -> io::Result; /// Sets the value of the `IP_MULTICAST_LOOP` option for this socket. /// /// If enabled, multicast packets will be looped back to the local socket. /// Note that this may not have any affect on IPv6 sockets. fn set_multicast_loop_v4(&self, multicast_loop_v4: bool) -> io::Result<()>; /// Gets the value of the `IP_MULTICAST_LOOP` option for this socket. /// /// For more information about this option, see /// [`set_multicast_loop_v4`][link]. /// /// [link]: #tymethod.set_multicast_loop_v4 fn multicast_loop_v4(&self) -> io::Result; /// Sets the value of the `IP_MULTICAST_TTL` option for this socket. /// /// Indicates the time-to-live value of outgoing multicast packets for /// this socket. The default value is 1 which means that multicast packets /// don't leave the local network unless explicitly requested. /// /// Note that this may not have any affect on IPv6 sockets. fn set_multicast_ttl_v4(&self, multicast_ttl_v4: u32) -> io::Result<()>; /// Gets the value of the `IP_MULTICAST_TTL` option for this socket. /// /// For more information about this option, see /// [`set_multicast_ttl_v4`][link]. /// /// [link]: #tymethod.set_multicast_ttl_v4 fn multicast_ttl_v4(&self) -> io::Result; /// Sets the value of the `IPV6_MULTICAST_HOPS` option for this socket fn set_multicast_hops_v6(&self, hops: u32) -> io::Result<()>; /// Gets the value of the `IPV6_MULTICAST_HOPS` option for this socket fn multicast_hops_v6(&self) -> io::Result; /// Sets the value of the `IPV6_MULTICAST_LOOP` option for this socket. /// /// Controls whether this socket sees the multicast packets it sends itself. /// Note that this may not have any affect on IPv4 sockets. fn set_multicast_loop_v6(&self, multicast_loop_v6: bool) -> io::Result<()>; /// Gets the value of the `IPV6_MULTICAST_LOOP` option for this socket. /// /// For more information about this option, see /// [`set_multicast_loop_v6`][link]. /// /// [link]: #tymethod.set_multicast_loop_v6 fn multicast_loop_v6(&self) -> io::Result; /// Sets the value of the `IP_MULTICAST_IF` option for this socket. /// /// Specifies the interface to use for routing multicast packets. fn set_multicast_if_v4(&self, interface: &Ipv4Addr) -> io::Result<()>; /// Gets the value of the `IP_MULTICAST_IF` option for this socket. /// /// Returns the interface to use for routing multicast packets. fn multicast_if_v4(&self) -> io::Result; /// Sets the value of the `IPV6_MULTICAST_IF` option for this socket. /// /// Specifies the interface to use for routing multicast packets. fn set_multicast_if_v6(&self, interface: u32) -> io::Result<()>; /// Gets the value of the `IPV6_MULTICAST_IF` option for this socket. /// /// Returns the interface to use for routing multicast packets. fn multicast_if_v6(&self) -> io::Result; /// Sets the value for the `IP_TTL` option on this socket. /// /// This is the same as [`TcpStreamExt::set_ttl`][other]. /// /// [other]: trait.TcpStreamExt.html#tymethod.set_ttl fn set_ttl(&self, ttl: u32) -> io::Result<()>; /// Gets the value of the `IP_TTL` option for this socket. /// /// For more information about this option, see /// [`TcpStreamExt::set_ttl`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_ttl fn ttl(&self) -> io::Result; /// Sets the value for the `IPV6_UNICAST_HOPS` option on this socket. /// /// Specifies the hop limit for ipv6 unicast packets fn set_unicast_hops_v6(&self, ttl: u32) -> io::Result<()>; /// Gets the value of the `IPV6_UNICAST_HOPS` option for this socket. /// /// Specifies the hop limit for ipv6 unicast packets fn unicast_hops_v6(&self) -> io::Result; /// Sets the value for the `IPV6_V6ONLY` option on this socket. /// /// For more information about this option, see /// [`TcpStreamExt::set_only_v6`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_only_v6 fn set_only_v6(&self, only_v6: bool) -> io::Result<()>; /// Gets the value of the `IPV6_V6ONLY` option for this socket. /// /// For more information about this option, see /// [`TcpStreamExt::set_only_v6`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_only_v6 fn only_v6(&self) -> io::Result; /// Executes an operation of the `IP_ADD_MEMBERSHIP` type. /// /// This function specifies a new multicast group for this socket to join. /// The address must be a valid multicast address, and `interface` is the /// address of the local interface with which the system should join the /// multicast group. If it's equal to `INADDR_ANY` then an appropriate /// interface is chosen by the system. fn join_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()>; /// Executes an operation of the `IPV6_ADD_MEMBERSHIP` type. /// /// This function specifies a new multicast group for this socket to join. /// The address must be a valid multicast address, and `interface` is the /// index of the interface to join/leave (or 0 to indicate any interface). fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()>; /// Executes an operation of the `IP_DROP_MEMBERSHIP` type. /// /// For more information about this option, see /// [`join_multicast_v4`][link]. /// /// [link]: #tymethod.join_multicast_v4 fn leave_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()>; /// Executes an operation of the `IPV6_DROP_MEMBERSHIP` type. /// /// For more information about this option, see /// [`join_multicast_v6`][link]. /// /// [link]: #tymethod.join_multicast_v6 fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()>; /// Sets the `SO_RCVTIMEO` option for this socket. /// /// This option specifies the timeout, in milliseconds, of how long calls to /// this socket's `read` function will wait before returning a timeout. A /// value of `None` means that no read timeout should be specified and /// otherwise `Some` indicates the number of milliseconds for the timeout. fn set_read_timeout_ms(&self, val: Option) -> io::Result<()>; /// Sets the `SO_RCVTIMEO` option for this socket. /// /// This option specifies the timeout of how long calls to this socket's /// `read` function will wait before returning a timeout. A value of `None` /// means that no read timeout should be specified and otherwise `Some` /// indicates the number of duration of the timeout. fn set_read_timeout(&self, val: Option) -> io::Result<()>; /// Gets the value of the `SO_RCVTIMEO` option for this socket. /// /// For more information about this option, see [`set_read_timeout_ms`][link]. /// /// [link]: #tymethod.set_read_timeout_ms fn read_timeout_ms(&self) -> io::Result>; /// Gets the value of the `SO_RCVTIMEO` option for this socket. /// /// For more information about this option, see [`set_read_timeout`][link]. /// /// [link]: #tymethod.set_read_timeout fn read_timeout(&self) -> io::Result>; /// Sets the `SO_SNDTIMEO` option for this socket. /// /// This option specifies the timeout, in milliseconds, of how long calls to /// this socket's `write` function will wait before returning a timeout. A /// value of `None` means that no read timeout should be specified and /// otherwise `Some` indicates the number of milliseconds for the timeout. fn set_write_timeout_ms(&self, val: Option) -> io::Result<()>; /// Sets the `SO_SNDTIMEO` option for this socket. /// /// This option specifies the timeout of how long calls to this socket's /// `write` function will wait before returning a timeout. A value of `None` /// means that no read timeout should be specified and otherwise `Some` /// indicates the duration of the timeout. fn set_write_timeout(&self, val: Option) -> io::Result<()>; /// Gets the value of the `SO_SNDTIMEO` option for this socket. /// /// For more information about this option, see [`set_write_timeout_ms`][link]. /// /// [link]: #tymethod.set_write_timeout_ms fn write_timeout_ms(&self) -> io::Result>; /// Gets the value of the `SO_SNDTIMEO` option for this socket. /// /// For more information about this option, see [`set_write_timeout`][link]. /// /// [link]: #tymethod.set_write_timeout fn write_timeout(&self) -> io::Result>; /// Get the value of the `SO_ERROR` option on this socket. /// /// This will retrieve the stored error in the underlying socket, clearing /// the field in the process. This can be useful for checking errors between /// calls. fn take_error(&self) -> io::Result>; /// Connects this UDP socket to a remote address, allowing the `send` and /// `recv` syscalls to be used to send data and also applies filters to only /// receive data from the specified address. fn connect(&self, addr: A) -> io::Result<()>; /// Sends data on the socket to the remote address to which it is connected. /// /// The `connect` method will connect this socket to a remote address. This /// method will fail if the socket is not connected. fn send(&self, buf: &[u8]) -> io::Result; /// Receives data on the socket from the remote address to which it is /// connected. /// /// The `connect` method will connect this socket to a remote address. This /// method will fail if the socket is not connected. fn recv(&self, buf: &mut [u8]) -> io::Result; /// Moves this UDP socket into or out of nonblocking mode. /// /// For more information about this option, see /// [`TcpStreamExt::set_nonblocking`][link]. /// /// [link]: trait.TcpStreamExt.html#tymethod.set_nonblocking fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()>; } #[doc(hidden)] pub trait AsSock { fn as_sock(&self) -> Socket; } #[cfg(any(unix, target_os = "wasi"))] impl AsSock for T { fn as_sock(&self) -> Socket { self.as_raw_fd() } } #[cfg(windows)] impl AsSock for T { fn as_sock(&self) -> Socket { self.as_raw_socket() as Socket } } cfg_if! { if #[cfg(any(target_os = "macos", target_os = "ios"))] { use libc::TCP_KEEPALIVE as KEEPALIVE_OPTION; } else if #[cfg(any(target_os = "haiku", target_os = "netbsd", target_os = "openbsd"))] { use libc::SO_KEEPALIVE as KEEPALIVE_OPTION; } else if #[cfg(unix)] { use libc::TCP_KEEPIDLE as KEEPALIVE_OPTION; } else { // ... } } impl TcpStreamExt for TcpStream { fn set_recv_buffer_size(&self, size: usize) -> io::Result<()> { // TODO: casting usize to a c_int should be a checked cast set_opt(self.as_sock(), SOL_SOCKET, SO_RCVBUF, size as c_int) } fn recv_buffer_size(&self) -> io::Result { get_opt(self.as_sock(), SOL_SOCKET, SO_RCVBUF).map(int2usize) } fn set_send_buffer_size(&self, size: usize) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_SNDBUF, size as c_int) } fn send_buffer_size(&self) -> io::Result { get_opt(self.as_sock(), SOL_SOCKET, SO_SNDBUF).map(int2usize) } fn set_nodelay(&self, nodelay: bool) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_TCP), TCP_NODELAY, nodelay as c_int) } fn nodelay(&self) -> io::Result { get_opt(self.as_sock(), v(IPPROTO_TCP), TCP_NODELAY) .map(int2bool) } fn set_keepalive(&self, keepalive: Option) -> io::Result<()> { self.set_keepalive_ms(keepalive.map(dur2ms)) } fn keepalive(&self) -> io::Result> { self.keepalive_ms().map(|o| o.map(ms2dur)) } #[cfg(unix)] fn set_keepalive_ms(&self, keepalive: Option) -> io::Result<()> { try!(set_opt(self.as_sock(), SOL_SOCKET, SO_KEEPALIVE, keepalive.is_some() as c_int)); if let Some(dur) = keepalive { try!(set_opt(self.as_sock(), v(IPPROTO_TCP), KEEPALIVE_OPTION, (dur / 1000) as c_int)); } Ok(()) } #[cfg(unix)] fn keepalive_ms(&self) -> io::Result> { let keepalive = try!(get_opt::(self.as_sock(), SOL_SOCKET, SO_KEEPALIVE)); if keepalive == 0 { return Ok(None) } let secs = try!(get_opt::(self.as_sock(), v(IPPROTO_TCP), KEEPALIVE_OPTION)); Ok(Some((secs as u32) * 1000)) } #[cfg(target_os = "wasi")] fn set_keepalive_ms(&self, _keepalive: Option) -> io::Result<()> { unimplemented!() } #[cfg(target_os = "wasi")] fn keepalive_ms(&self) -> io::Result> { unimplemented!() } #[cfg(windows)] fn set_keepalive_ms(&self, keepalive: Option) -> io::Result<()> { let ms = keepalive.unwrap_or(INFINITE); let ka = tcp_keepalive { onoff: keepalive.is_some() as c_ulong, keepalivetime: ms as c_ulong, keepaliveinterval: ms as c_ulong, }; unsafe { ::cvt_win(WSAIoctl(self.as_sock(), SIO_KEEPALIVE_VALS, &ka as *const _ as *mut _, mem::size_of_val(&ka) as DWORD, 0 as *mut _, 0, 0 as *mut _, 0 as *mut _, None)).map(|_| ()) } } #[cfg(windows)] fn keepalive_ms(&self) -> io::Result> { let mut ka = tcp_keepalive { onoff: 0, keepalivetime: 0, keepaliveinterval: 0, }; unsafe { try!(::cvt_win(WSAIoctl(self.as_sock(), SIO_KEEPALIVE_VALS, 0 as *mut _, 0, &mut ka as *mut _ as *mut _, mem::size_of_val(&ka) as DWORD, 0 as *mut _, 0 as *mut _, None))); } Ok({ if ka.onoff == 0 { None } else { timeout2ms(ka.keepaliveinterval as DWORD) } }) } fn set_read_timeout_ms(&self, dur: Option) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_RCVTIMEO, ms2timeout(dur)) } fn read_timeout_ms(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_RCVTIMEO) .map(timeout2ms) } fn set_write_timeout_ms(&self, dur: Option) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_SNDTIMEO, ms2timeout(dur)) } fn write_timeout_ms(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_SNDTIMEO) .map(timeout2ms) } fn set_read_timeout(&self, dur: Option) -> io::Result<()> { self.set_read_timeout_ms(dur.map(dur2ms)) } fn read_timeout(&self) -> io::Result> { self.read_timeout_ms().map(|o| o.map(ms2dur)) } fn set_write_timeout(&self, dur: Option) -> io::Result<()> { self.set_write_timeout_ms(dur.map(dur2ms)) } fn write_timeout(&self) -> io::Result> { self.write_timeout_ms().map(|o| o.map(ms2dur)) } fn set_ttl(&self, ttl: u32) -> io::Result<()> { set_opt(self.as_sock(), IPPROTO_IP, IP_TTL, ttl as c_int) } fn ttl(&self) -> io::Result { get_opt::(self.as_sock(), IPPROTO_IP, IP_TTL) .map(|b| b as u32) } fn set_only_v6(&self, only_v6: bool) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY, only_v6 as c_int) } fn only_v6(&self) -> io::Result { get_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY).map(int2bool) } fn connect(&self, addr: T) -> io::Result<()> { do_connect(self.as_sock(), addr) } fn take_error(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_ERROR).map(int2err) } fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { set_nonblocking(self.as_sock(), nonblocking) } fn set_linger(&self, dur: Option) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_LINGER, dur2linger(dur)) } fn linger(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_LINGER).map(linger2dur) } } #[cfg(any(unix, target_os = "wasi"))] fn ms2timeout(dur: Option) -> timeval { // TODO: be more rigorous match dur { Some(d) => timeval { tv_sec: (d / 1000) as time_t, tv_usec: (d % 1000) as suseconds_t, }, None => timeval { tv_sec: 0, tv_usec: 0 }, } } #[cfg(any(unix, target_os = "wasi"))] fn timeout2ms(dur: timeval) -> Option { if dur.tv_sec == 0 && dur.tv_usec == 0 { None } else { Some(dur.tv_sec as u32 * 1000 + dur.tv_usec as u32 / 1000) } } #[cfg(windows)] fn ms2timeout(dur: Option) -> DWORD { dur.unwrap_or(0) } #[cfg(windows)] fn timeout2ms(dur: DWORD) -> Option { if dur == 0 { None } else { Some(dur) } } fn linger2dur(linger_opt: linger) -> Option { if linger_opt.l_onoff == 0 { None } else { Some(Duration::from_secs(linger_opt.l_linger as u64)) } } #[cfg(windows)] fn dur2linger(dur: Option) -> linger { match dur { Some(d) => { linger { l_onoff: 1, l_linger: d.as_secs() as u16, } }, None => linger { l_onoff: 0, l_linger: 0 }, } } #[cfg(any(unix, target_os = "wasi"))] fn dur2linger(dur: Option) -> linger { match dur { Some(d) => { linger { l_onoff: 1, l_linger: d.as_secs() as c_int, } }, None => linger { l_onoff: 0, l_linger: 0 }, } } fn ms2dur(ms: u32) -> Duration { Duration::new((ms as u64) / 1000, (ms as u32) % 1000 * 1_000_000) } fn dur2ms(dur: Duration) -> u32 { (dur.as_secs() as u32 * 1000) + (dur.subsec_nanos() / 1_000_000) } pub fn int2bool(n: c_int) -> bool { if n == 0 {false} else {true} } pub fn int2usize(n: c_int) -> usize { // TODO: casting c_int to a usize should be a checked cast n as usize } pub fn int2err(n: c_int) -> Option { if n == 0 { None } else { Some(io::Error::from_raw_os_error(n as i32)) } } impl UdpSocketExt for UdpSocket { fn set_recv_buffer_size(&self, size: usize) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_RCVBUF, size as c_int) } fn recv_buffer_size(&self) -> io::Result { get_opt(self.as_sock(), SOL_SOCKET, SO_RCVBUF).map(int2usize) } fn set_send_buffer_size(&self, size: usize) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_SNDBUF, size as c_int) } fn send_buffer_size(&self) -> io::Result { get_opt(self.as_sock(), SOL_SOCKET, SO_SNDBUF).map(int2usize) } fn set_broadcast(&self, broadcast: bool) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_BROADCAST, broadcast as c_int) } fn broadcast(&self) -> io::Result { get_opt(self.as_sock(), SOL_SOCKET, SO_BROADCAST) .map(int2bool) } fn set_multicast_loop_v4(&self, multicast_loop_v4: bool) -> io::Result<()> { set_opt(self.as_sock(), IPPROTO_IP, IP_MULTICAST_LOOP, multicast_loop_v4 as c_int) } fn multicast_loop_v4(&self) -> io::Result { get_opt(self.as_sock(), IPPROTO_IP, IP_MULTICAST_LOOP) .map(int2bool) } fn set_multicast_ttl_v4(&self, multicast_ttl_v4: u32) -> io::Result<()> { set_opt(self.as_sock(), IPPROTO_IP, IP_MULTICAST_TTL, multicast_ttl_v4 as c_int) } fn multicast_ttl_v4(&self) -> io::Result { get_opt::(self.as_sock(), IPPROTO_IP, IP_MULTICAST_TTL) .map(|b| b as u32) } fn set_multicast_hops_v6(&self, _hops: u32) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_MULTICAST_HOPS, _hops as c_int) } fn multicast_hops_v6(&self) -> io::Result { get_opt::(self.as_sock(), v(IPPROTO_IPV6), IPV6_MULTICAST_HOPS) .map(|b| b as u32) } fn set_multicast_loop_v6(&self, multicast_loop_v6: bool) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_MULTICAST_LOOP, multicast_loop_v6 as c_int) } fn multicast_loop_v6(&self) -> io::Result { get_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_MULTICAST_LOOP) .map(int2bool) } fn set_multicast_if_v4(&self, _interface: &Ipv4Addr) -> io::Result<()> { set_opt(self.as_sock(), IPPROTO_IP, IP_MULTICAST_IF, ip2in_addr(_interface)) } fn multicast_if_v4(&self) -> io::Result { get_opt(self.as_sock(), IPPROTO_IP, IP_MULTICAST_IF).map(in_addr2ip) } fn set_multicast_if_v6(&self, _interface: u32) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_MULTICAST_IF, to_ipv6mr_interface(_interface)) } fn multicast_if_v6(&self) -> io::Result { get_opt::(self.as_sock(), v(IPPROTO_IPV6), IPV6_MULTICAST_IF).map(|b| b as u32) } fn set_ttl(&self, ttl: u32) -> io::Result<()> { set_opt(self.as_sock(), IPPROTO_IP, IP_TTL, ttl as c_int) } fn ttl(&self) -> io::Result { get_opt::(self.as_sock(), IPPROTO_IP, IP_TTL) .map(|b| b as u32) } fn set_unicast_hops_v6(&self, _ttl: u32) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_UNICAST_HOPS, _ttl as c_int) } fn unicast_hops_v6(&self) -> io::Result { get_opt::(self.as_sock(), IPPROTO_IP, IPV6_UNICAST_HOPS) .map(|b| b as u32) } fn set_only_v6(&self, only_v6: bool) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY, only_v6 as c_int) } fn only_v6(&self) -> io::Result { get_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY).map(int2bool) } fn join_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> { let mreq = ip_mreq { imr_multiaddr: ip2in_addr(multiaddr), imr_interface: ip2in_addr(interface), }; set_opt(self.as_sock(), IPPROTO_IP, IP_ADD_MEMBERSHIP, mreq) } fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> { let mreq = ipv6_mreq { ipv6mr_multiaddr: ip2in6_addr(multiaddr), ipv6mr_interface: to_ipv6mr_interface(interface), }; set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_ADD_MEMBERSHIP, mreq) } fn leave_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> { let mreq = ip_mreq { imr_multiaddr: ip2in_addr(multiaddr), imr_interface: ip2in_addr(interface), }; set_opt(self.as_sock(), IPPROTO_IP, IP_DROP_MEMBERSHIP, mreq) } fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> { let mreq = ipv6_mreq { ipv6mr_multiaddr: ip2in6_addr(multiaddr), ipv6mr_interface: to_ipv6mr_interface(interface), }; set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_DROP_MEMBERSHIP, mreq) } fn set_read_timeout_ms(&self, dur: Option) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_RCVTIMEO, ms2timeout(dur)) } fn read_timeout_ms(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_RCVTIMEO) .map(timeout2ms) } fn set_write_timeout_ms(&self, dur: Option) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_SNDTIMEO, ms2timeout(dur)) } fn write_timeout_ms(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_SNDTIMEO) .map(timeout2ms) } fn set_read_timeout(&self, dur: Option) -> io::Result<()> { self.set_read_timeout_ms(dur.map(dur2ms)) } fn read_timeout(&self) -> io::Result> { self.read_timeout_ms().map(|o| o.map(ms2dur)) } fn set_write_timeout(&self, dur: Option) -> io::Result<()> { self.set_write_timeout_ms(dur.map(dur2ms)) } fn write_timeout(&self) -> io::Result> { self.write_timeout_ms().map(|o| o.map(ms2dur)) } fn take_error(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_ERROR).map(int2err) } fn connect(&self, addr: A) -> io::Result<()> { do_connect(self.as_sock(), addr) } #[cfg(unix)] fn send(&self, buf: &[u8]) -> io::Result { unsafe { ::cvt(send(self.as_sock() as c_int, buf.as_ptr() as *const _, buf.len(), 0)).map(|n| n as usize) } } #[cfg(target_os = "wasi")] fn send(&self, buf: &[u8]) -> io::Result { let _so_datalen: *mut sys::c::size_t = &mut 0; unsafe { let _errno = libc::__wasi_sock_send( self.as_sock() as libc::__wasi_fd_t, buf.as_ptr() as *const _, buf.len(), 0, _so_datalen, ); // TODO: handle errno Ok((*_so_datalen) as usize) } } #[cfg(windows)] fn send(&self, buf: &[u8]) -> io::Result { let len = ::std::cmp::min(buf.len(), c_int::max_value() as usize); let buf = &buf[..len]; unsafe { ::cvt(send(self.as_sock(), buf.as_ptr() as *const _, len as c_int, 0)) .map(|n| n as usize) } } #[cfg(unix)] fn recv(&self, buf: &mut [u8]) -> io::Result { unsafe { ::cvt(recv(self.as_sock(), buf.as_mut_ptr() as *mut _, buf.len(), 0)) .map(|n| n as usize) } } #[cfg(target_os = "wasi")] fn recv(&self, buf: &mut [u8]) -> io::Result { let _ro_datalen: *mut sys::c::size_t = &mut 0; let _ro_flags: *mut sys::c::__wasi_roflags_t = &mut 0; unsafe { let _errno = __wasi_sock_recv( self.as_sock(), buf.as_mut_ptr() as *mut _, buf.len(), 0, _ro_datalen, _ro_flags, ); // TODO: handle errno Ok((*_ro_datalen) as usize) } } #[cfg(windows)] fn recv(&self, buf: &mut [u8]) -> io::Result { let len = ::std::cmp::min(buf.len(), c_int::max_value() as usize); let buf = &mut buf[..len]; unsafe { ::cvt(recv(self.as_sock(), buf.as_mut_ptr() as *mut _, buf.len() as c_int, 0)) .map(|n| n as usize) } } fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { set_nonblocking(self.as_sock(), nonblocking) } } fn do_connect(sock: Socket, addr: A) -> io::Result<()> { let err = io::Error::new(io::ErrorKind::Other, "no socket addresses resolved"); let addrs = try!(addr.to_socket_addrs()); let sys = sys::Socket::from_inner(sock); let sock = socket::Socket::from_inner(sys); let ret = addrs.fold(Err(err), |prev, addr| { prev.or_else(|_| sock.connect(&addr)) }); mem::forget(sock); return ret } #[cfg(unix)] fn set_nonblocking(sock: Socket, nonblocking: bool) -> io::Result<()> { let mut nonblocking = nonblocking as c_ulong; ::cvt(unsafe { ioctl(sock, FIONBIO, &mut nonblocking) }).map(|_| ()) } #[cfg(target_os = "wasi")] fn set_nonblocking(_sock: Socket, _nonblocking: bool) -> io::Result<()> { Ok(()) } #[cfg(windows)] fn set_nonblocking(sock: Socket, nonblocking: bool) -> io::Result<()> { let mut nonblocking = nonblocking as c_ulong; ::cvt(unsafe { ioctlsocket(sock, FIONBIO as c_int, &mut nonblocking) }).map(|_| ()) } #[cfg(any(unix, target_os = "wasi"))] fn ip2in_addr(ip: &Ipv4Addr) -> in_addr { let oct = ip.octets(); in_addr { s_addr: ::hton(((oct[0] as u32) << 24) | ((oct[1] as u32) << 16) | ((oct[2] as u32) << 8) | ((oct[3] as u32) << 0)), } } #[cfg(windows)] fn ip2in_addr(ip: &Ipv4Addr) -> in_addr { let oct = ip.octets(); unsafe { let mut S_un: in_addr_S_un = mem::zeroed(); *S_un.S_addr_mut() = ::hton(((oct[0] as u32) << 24) | ((oct[1] as u32) << 16) | ((oct[2] as u32) << 8) | ((oct[3] as u32) << 0)); in_addr { S_un: S_un, } } } fn in_addr2ip(ip: &in_addr) -> Ipv4Addr { let h_addr = c::in_addr_to_u32(ip); let a: u8 = (h_addr >> 24) as u8; let b: u8 = (h_addr >> 16) as u8; let c: u8 = (h_addr >> 8) as u8; let d: u8 = (h_addr >> 0) as u8; Ipv4Addr::new(a,b,c,d) } #[cfg(target_os = "android")] fn to_ipv6mr_interface(value: u32) -> c_int { value as c_int } #[cfg(not(target_os = "android"))] fn to_ipv6mr_interface(value: u32) -> c_uint { value as c_uint } fn ip2in6_addr(ip: &Ipv6Addr) -> in6_addr { let mut ret: in6_addr = unsafe { mem::zeroed() }; let seg = ip.segments(); let bytes = [ (seg[0] >> 8) as u8, (seg[0] >> 0) as u8, (seg[1] >> 8) as u8, (seg[1] >> 0) as u8, (seg[2] >> 8) as u8, (seg[2] >> 0) as u8, (seg[3] >> 8) as u8, (seg[3] >> 0) as u8, (seg[4] >> 8) as u8, (seg[4] >> 0) as u8, (seg[5] >> 8) as u8, (seg[5] >> 0) as u8, (seg[6] >> 8) as u8, (seg[6] >> 0) as u8, (seg[7] >> 8) as u8, (seg[7] >> 0) as u8, ]; #[cfg(windows)] unsafe { *ret.u.Byte_mut() = bytes; } #[cfg(not(windows))] { ret.s6_addr = bytes; } return ret } impl TcpListenerExt for TcpListener { fn set_ttl(&self, ttl: u32) -> io::Result<()> { set_opt(self.as_sock(), IPPROTO_IP, IP_TTL, ttl as c_int) } fn ttl(&self) -> io::Result { get_opt::(self.as_sock(), IPPROTO_IP, IP_TTL) .map(|b| b as u32) } fn set_only_v6(&self, only_v6: bool) -> io::Result<()> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY, only_v6 as c_int) } fn only_v6(&self) -> io::Result { get_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY).map(int2bool) } fn take_error(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_ERROR).map(int2err) } fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { set_nonblocking(self.as_sock(), nonblocking) } fn set_linger(&self, dur: Option) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_LINGER, dur2linger(dur)) } fn linger(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_LINGER).map(linger2dur) } } impl TcpBuilder { /// Sets the value for the `IP_TTL` option on this socket. /// /// This is the same as [`TcpStreamExt::set_ttl`][other]. /// /// [other]: trait.TcpStreamExt.html#tymethod.set_ttl pub fn ttl(&self, ttl: u32) -> io::Result<&Self> { set_opt(self.as_sock(), IPPROTO_IP, IP_TTL, ttl as c_int) .map(|()| self) } /// Sets the value for the `IPV6_V6ONLY` option on this socket. /// /// This is the same as [`TcpStreamExt::set_only_v6`][other]. /// /// [other]: trait.TcpStreamExt.html#tymethod.set_only_v6 pub fn only_v6(&self, only_v6: bool) -> io::Result<&Self> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY, only_v6 as c_int) .map(|()| self) } /// Set value for the `SO_REUSEADDR` option on this socket. /// /// This indicates that further calls to `bind` may allow reuse of local /// addresses. For IPv4 sockets this means that a socket may bind even when /// there's a socket already listening on this port. pub fn reuse_address(&self, reuse: bool) -> io::Result<&Self> { set_opt(self.as_sock(), SOL_SOCKET, SO_REUSEADDR, reuse as c_int).map(|()| self) } /// Check the `SO_REUSEADDR` option on this socket. pub fn get_reuse_address(&self) -> io::Result { get_opt(self.as_sock(), SOL_SOCKET, SO_REUSEADDR).map(int2bool) } /// Get the value of the `SO_ERROR` option on this socket. /// /// This will retrieve the stored error in the underlying socket, clearing /// the field in the process. This can be useful for checking errors between /// calls. pub fn take_error(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_ERROR).map(int2err) } /// Sets the linger option for this socket fn set_linger(&self, dur: Option) -> io::Result<()> { set_opt(self.as_sock(), SOL_SOCKET, SO_LINGER, dur2linger(dur)) } /// Gets the linger option for this socket fn linger(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_LINGER).map(linger2dur) } } impl UdpBuilder { /// Sets the value for the `IP_TTL` option on this socket. /// /// This is the same as [`TcpStreamExt::set_ttl`][other]. /// /// [other]: trait.TcpStreamExt.html#tymethod.set_ttl pub fn ttl(&self, ttl: u32) -> io::Result<&Self> { set_opt(self.as_sock(), IPPROTO_IP, IP_TTL, ttl as c_int) .map(|()| self) } /// Sets the value for the `IPV6_V6ONLY` option on this socket. /// /// This is the same as [`TcpStream::only_v6`][other]. /// /// [other]: struct.TcpBuilder.html#method.only_v6 pub fn only_v6(&self, only_v6: bool) -> io::Result<&Self> { set_opt(self.as_sock(), v(IPPROTO_IPV6), IPV6_V6ONLY, only_v6 as c_int) .map(|()| self) } /// Set value for the `SO_REUSEADDR` option on this socket. /// /// This is the same as [`TcpBuilder::reuse_address`][other]. /// /// [other]: struct.TcpBuilder.html#method.reuse_address pub fn reuse_address(&self, reuse: bool) -> io::Result<&Self> { set_opt(self.as_sock(), SOL_SOCKET, SO_REUSEADDR, reuse as c_int).map(|()| self) } /// Check the `SO_REUSEADDR` option on this socket. pub fn get_reuse_address(&self) -> io::Result { get_opt(self.as_sock(), SOL_SOCKET, SO_REUSEADDR).map(int2bool) } /// Get the value of the `SO_ERROR` option on this socket. /// /// This will retrieve the stored error in the underlying socket, clearing /// the field in the process. This can be useful for checking errors between /// calls. pub fn take_error(&self) -> io::Result> { get_opt(self.as_sock(), SOL_SOCKET, SO_ERROR).map(int2err) } }