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630 lines
20 KiB
630 lines
20 KiB
// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT |
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// file at the top-level directory of this distribution and at |
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// http://rust-lang.org/COPYRIGHT. |
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// |
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
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// option. This file may not be copied, modified, or distributed |
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// except according to those terms. |
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#![allow(dead_code)] |
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use cmp; |
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use ffi::CString; |
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use fmt; |
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use io::{self, Error, ErrorKind}; |
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use libc::{c_int, c_void}; |
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use mem; |
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use net::{SocketAddr, Shutdown, Ipv4Addr, Ipv6Addr}; |
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use ptr; |
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use sys::net::{cvt, cvt_r, cvt_gai, Socket, init, wrlen_t}; |
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use sys::net::netc as c; |
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use sys_common::{AsInner, FromInner, IntoInner}; |
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use time::Duration; |
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// IPV6 stuff does not seem to be supported on 3DS. TODO: Determine if that's true |
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const IPV6_ADD_MEMBERSHIP: c_int = 0x0; |
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const IPV6_DROP_MEMBERSHIP: c_int = 0x0; |
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const IPV6_MULTICAST_LOOP: c_int = 0x0; |
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const IPV6_V6ONLY: c_int = 0x0; |
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// Neither are signals |
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const MSG_NOSIGNAL: c_int = 0x0; |
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// These constants are also currently missing from libctru. TODO: Find them? |
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const SO_SNDTIMEO: c_int = 0x0; |
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const SO_RCVTIMEO: c_int = 0x0; |
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const SO_BROADCAST: c_int = 0x0; |
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//////////////////////////////////////////////////////////////////////////////// |
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// sockaddr and misc bindings |
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//////////////////////////////////////////////////////////////////////////////// |
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pub fn setsockopt<T>(sock: &Socket, opt: c_int, val: c_int, |
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payload: T) -> io::Result<()> { |
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unsafe { |
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let payload = &payload as *const T as *const c_void; |
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cvt(c::setsockopt(*sock.as_inner(), opt, val, payload, |
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mem::size_of::<T>() as c::socklen_t))?; |
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Ok(()) |
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} |
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} |
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pub fn getsockopt<T: Copy>(sock: &Socket, opt: c_int, |
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val: c_int) -> io::Result<T> { |
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unsafe { |
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let mut slot: T = mem::zeroed(); |
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let mut len = mem::size_of::<T>() as c::socklen_t; |
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cvt(c::getsockopt(*sock.as_inner(), opt, val, |
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&mut slot as *mut _ as *mut _, |
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&mut len))?; |
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assert_eq!(len as usize, mem::size_of::<T>()); |
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Ok(slot) |
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} |
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} |
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fn sockname<F>(f: F) -> io::Result<SocketAddr> |
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where F: FnOnce(*mut c::sockaddr, *mut c::socklen_t) -> c_int |
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{ |
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unsafe { |
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let mut storage: c::sockaddr_storage = mem::zeroed(); |
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let mut len = mem::size_of_val(&storage) as c::socklen_t; |
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cvt(f(&mut storage as *mut _ as *mut _, &mut len))?; |
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sockaddr_to_addr(&storage, len as usize) |
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} |
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} |
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pub fn sockaddr_to_addr(storage: &c::sockaddr_storage, |
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len: usize) -> io::Result<SocketAddr> { |
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match storage.ss_family as c_int { |
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c::AF_INET => { |
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assert!(len as usize >= mem::size_of::<c::sockaddr_in>()); |
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Ok(SocketAddr::V4(FromInner::from_inner(unsafe { |
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*(storage as *const _ as *const c::sockaddr_in) |
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}))) |
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} |
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c::AF_INET6 => { |
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assert!(len as usize >= mem::size_of::<c::sockaddr_in6>()); |
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Ok(SocketAddr::V6(FromInner::from_inner(unsafe { |
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*(storage as *const _ as *const c::sockaddr_in6) |
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}))) |
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} |
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_ => { |
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Err(Error::new(ErrorKind::InvalidInput, "invalid argument")) |
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} |
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} |
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} |
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#[cfg(target_os = "android")] |
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fn to_ipv6mr_interface(value: u32) -> c_int { |
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value as c_int |
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} |
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#[cfg(not(target_os = "android"))] |
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fn to_ipv6mr_interface(value: u32) -> ::libc::c_uint { |
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value as ::libc::c_uint |
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} |
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//////////////////////////////////////////////////////////////////////////////// |
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// get_host_addresses |
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//////////////////////////////////////////////////////////////////////////////// |
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pub struct LookupHost { |
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original: *mut c::addrinfo, |
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cur: *mut c::addrinfo, |
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} |
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impl Iterator for LookupHost { |
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type Item = SocketAddr; |
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fn next(&mut self) -> Option<SocketAddr> { |
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loop { |
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unsafe { |
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let cur = self.cur.as_ref()?; |
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self.cur = cur.ai_next; |
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match sockaddr_to_addr(mem::transmute(cur.ai_addr), |
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cur.ai_addrlen as usize) |
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{ |
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Ok(addr) => return Some(addr), |
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Err(_) => continue, |
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} |
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} |
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} |
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} |
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} |
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unsafe impl Sync for LookupHost {} |
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unsafe impl Send for LookupHost {} |
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impl Drop for LookupHost { |
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fn drop(&mut self) { |
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unsafe { c::freeaddrinfo(self.original) } |
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} |
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} |
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pub fn lookup_host(host: &str) -> io::Result<LookupHost> { |
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init(); |
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let c_host = CString::new(host)?; |
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let mut hints: c::addrinfo = unsafe { mem::zeroed() }; |
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hints.ai_socktype = c::SOCK_STREAM; |
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let mut res = ptr::null_mut(); |
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unsafe { |
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match cvt_gai(c::getaddrinfo(c_host.as_ptr() as *const u8, ptr::null(), &hints, &mut res)) { |
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Ok(_) => { |
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Ok(LookupHost { original: res, cur: res }) |
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}, |
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#[cfg(target_env = "gnu")] |
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Err(e) => { |
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// If we're running glibc prior to version 2.26, the lookup |
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// failure could be caused by caching a stale /etc/resolv.conf. |
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// We need to call libc::res_init() to clear the cache. But we |
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// shouldn't call it in on any other platform, because other |
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// res_init implementations aren't thread-safe. See |
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// https://github.com/rust-lang/rust/issues/41570 and |
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// https://github.com/rust-lang/rust/issues/43592. |
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use sys::net::res_init_if_glibc_before_2_26; |
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let _ = res_init_if_glibc_before_2_26(); |
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Err(e) |
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}, |
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// the cfg is needed here to avoid an "unreachable pattern" warning |
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#[cfg(not(target_env = "gnu"))] |
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Err(e) => Err(e), |
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} |
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} |
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} |
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//////////////////////////////////////////////////////////////////////////////// |
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// TCP streams |
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//////////////////////////////////////////////////////////////////////////////// |
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pub struct TcpStream { |
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inner: Socket, |
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} |
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impl TcpStream { |
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pub fn connect(addr: &SocketAddr) -> io::Result<TcpStream> { |
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init(); |
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let sock = Socket::new(addr, c::SOCK_STREAM)?; |
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let (addrp, len) = addr.into_inner(); |
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cvt_r(|| unsafe { c::connect(*sock.as_inner(), addrp, len) })?; |
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Ok(TcpStream { inner: sock }) |
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} |
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pub fn connect_timeout(addr: &SocketAddr, timeout: Duration) -> io::Result<TcpStream> { |
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init(); |
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let sock = Socket::new(addr, c::SOCK_STREAM)?; |
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sock.connect_timeout(addr, timeout)?; |
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Ok(TcpStream { inner: sock }) |
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} |
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pub fn socket(&self) -> &Socket { &self.inner } |
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pub fn into_socket(self) -> Socket { self.inner } |
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pub fn set_read_timeout(&self, dur: Option<Duration>) -> io::Result<()> { |
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self.inner.set_timeout(dur, SO_RCVTIMEO) |
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} |
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pub fn set_write_timeout(&self, dur: Option<Duration>) -> io::Result<()> { |
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self.inner.set_timeout(dur, SO_SNDTIMEO) |
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} |
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pub fn read_timeout(&self) -> io::Result<Option<Duration>> { |
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self.inner.timeout(SO_RCVTIMEO) |
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} |
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pub fn write_timeout(&self) -> io::Result<Option<Duration>> { |
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self.inner.timeout(SO_SNDTIMEO) |
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} |
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pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> { |
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self.inner.peek(buf) |
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} |
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pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> { |
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self.inner.read(buf) |
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} |
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pub fn write(&self, buf: &[u8]) -> io::Result<usize> { |
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let len = cmp::min(buf.len(), <wrlen_t>::max_value() as usize) as wrlen_t; |
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let ret = cvt(unsafe { |
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c::send(*self.inner.as_inner(), |
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buf.as_ptr() as *const c_void, |
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len, |
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MSG_NOSIGNAL) |
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})?; |
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Ok(ret as usize) |
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} |
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pub fn peer_addr(&self) -> io::Result<SocketAddr> { |
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sockname(|buf, len| unsafe { |
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c::getpeername(*self.inner.as_inner(), buf, len) |
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}) |
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} |
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pub fn socket_addr(&self) -> io::Result<SocketAddr> { |
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sockname(|buf, len| unsafe { |
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c::getsockname(*self.inner.as_inner(), buf, len) |
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}) |
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} |
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pub fn shutdown(&self, how: Shutdown) -> io::Result<()> { |
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self.inner.shutdown(how) |
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} |
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pub fn duplicate(&self) -> io::Result<TcpStream> { |
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self.inner.duplicate().map(|s| TcpStream { inner: s }) |
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} |
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pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> { |
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self.inner.set_nodelay(nodelay) |
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} |
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pub fn nodelay(&self) -> io::Result<bool> { |
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self.inner.nodelay() |
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} |
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pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { |
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setsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL, ttl as c_int) |
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} |
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pub fn ttl(&self) -> io::Result<u32> { |
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let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL)?; |
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Ok(raw as u32) |
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} |
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pub fn take_error(&self) -> io::Result<Option<io::Error>> { |
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self.inner.take_error() |
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} |
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pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { |
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self.inner.set_nonblocking(nonblocking) |
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} |
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} |
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impl FromInner<Socket> for TcpStream { |
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fn from_inner(socket: Socket) -> TcpStream { |
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TcpStream { inner: socket } |
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} |
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} |
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impl fmt::Debug for TcpStream { |
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
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let mut res = f.debug_struct("TcpStream"); |
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if let Ok(addr) = self.socket_addr() { |
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res.field("addr", &addr); |
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} |
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if let Ok(peer) = self.peer_addr() { |
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res.field("peer", &peer); |
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} |
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let name = if cfg!(windows) {"socket"} else {"fd"}; |
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res.field(name, &self.inner.as_inner()) |
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.finish() |
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} |
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} |
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//////////////////////////////////////////////////////////////////////////////// |
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// TCP listeners |
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//////////////////////////////////////////////////////////////////////////////// |
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pub struct TcpListener { |
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inner: Socket, |
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} |
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impl TcpListener { |
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pub fn bind(addr: &SocketAddr) -> io::Result<TcpListener> { |
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init(); |
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let sock = Socket::new(addr, c::SOCK_STREAM)?; |
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// On platforms with Berkeley-derived sockets, this allows |
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// to quickly rebind a socket, without needing to wait for |
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// the OS to clean up the previous one. |
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if !cfg!(windows) { |
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setsockopt(&sock, c::SOL_SOCKET, c::SO_REUSEADDR, |
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1 as c_int)?; |
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} |
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// Bind our new socket |
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let (addrp, len) = addr.into_inner(); |
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cvt(unsafe { c::bind(*sock.as_inner(), addrp, len as _) })?; |
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// Start listening |
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cvt(unsafe { c::listen(*sock.as_inner(), 128) })?; |
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Ok(TcpListener { inner: sock }) |
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} |
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pub fn socket(&self) -> &Socket { &self.inner } |
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pub fn into_socket(self) -> Socket { self.inner } |
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pub fn socket_addr(&self) -> io::Result<SocketAddr> { |
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sockname(|buf, len| unsafe { |
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c::getsockname(*self.inner.as_inner(), buf, len) |
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}) |
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} |
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pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> { |
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let mut storage: c::sockaddr_storage = unsafe { mem::zeroed() }; |
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let mut len = mem::size_of_val(&storage) as c::socklen_t; |
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let sock = self.inner.accept(&mut storage as *mut _ as *mut _, |
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&mut len)?; |
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let addr = sockaddr_to_addr(&storage, len as usize)?; |
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Ok((TcpStream { inner: sock, }, addr)) |
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} |
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pub fn duplicate(&self) -> io::Result<TcpListener> { |
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self.inner.duplicate().map(|s| TcpListener { inner: s }) |
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} |
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pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { |
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setsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL, ttl as c_int) |
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} |
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pub fn ttl(&self) -> io::Result<u32> { |
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let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL)?; |
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Ok(raw as u32) |
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} |
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pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> { |
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setsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_V6ONLY, only_v6 as c_int) |
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} |
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pub fn only_v6(&self) -> io::Result<bool> { |
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let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_V6ONLY)?; |
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Ok(raw != 0) |
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} |
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pub fn take_error(&self) -> io::Result<Option<io::Error>> { |
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self.inner.take_error() |
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} |
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pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { |
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self.inner.set_nonblocking(nonblocking) |
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} |
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} |
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impl FromInner<Socket> for TcpListener { |
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fn from_inner(socket: Socket) -> TcpListener { |
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TcpListener { inner: socket } |
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} |
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} |
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impl fmt::Debug for TcpListener { |
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
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let mut res = f.debug_struct("TcpListener"); |
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if let Ok(addr) = self.socket_addr() { |
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res.field("addr", &addr); |
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} |
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let name = if cfg!(windows) {"socket"} else {"fd"}; |
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res.field(name, &self.inner.as_inner()) |
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.finish() |
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} |
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} |
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//////////////////////////////////////////////////////////////////////////////// |
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// UDP |
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//////////////////////////////////////////////////////////////////////////////// |
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pub struct UdpSocket { |
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inner: Socket, |
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} |
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impl UdpSocket { |
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pub fn bind(addr: &SocketAddr) -> io::Result<UdpSocket> { |
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init(); |
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let sock = Socket::new(addr, c::SOCK_DGRAM)?; |
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let (addrp, len) = addr.into_inner(); |
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cvt(unsafe { c::bind(*sock.as_inner(), addrp, len as _) })?; |
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Ok(UdpSocket { inner: sock }) |
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} |
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pub fn socket(&self) -> &Socket { &self.inner } |
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pub fn into_socket(self) -> Socket { self.inner } |
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pub fn socket_addr(&self) -> io::Result<SocketAddr> { |
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sockname(|buf, len| unsafe { |
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c::getsockname(*self.inner.as_inner(), buf, len) |
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}) |
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} |
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pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> { |
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self.inner.recv_from(buf) |
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} |
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pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> { |
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self.inner.peek_from(buf) |
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} |
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pub fn send_to(&self, buf: &[u8], dst: &SocketAddr) -> io::Result<usize> { |
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let len = cmp::min(buf.len(), <wrlen_t>::max_value() as usize) as wrlen_t; |
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let (dstp, dstlen) = dst.into_inner(); |
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let ret = cvt(unsafe { |
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c::sendto(*self.inner.as_inner(), |
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buf.as_ptr() as *const c_void, len, |
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MSG_NOSIGNAL, dstp, dstlen) |
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})?; |
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Ok(ret as usize) |
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} |
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pub fn duplicate(&self) -> io::Result<UdpSocket> { |
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self.inner.duplicate().map(|s| UdpSocket { inner: s }) |
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} |
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pub fn set_read_timeout(&self, dur: Option<Duration>) -> io::Result<()> { |
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self.inner.set_timeout(dur, SO_RCVTIMEO) |
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} |
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pub fn set_write_timeout(&self, dur: Option<Duration>) -> io::Result<()> { |
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self.inner.set_timeout(dur, SO_SNDTIMEO) |
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} |
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pub fn read_timeout(&self) -> io::Result<Option<Duration>> { |
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self.inner.timeout(SO_RCVTIMEO) |
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} |
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pub fn write_timeout(&self) -> io::Result<Option<Duration>> { |
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self.inner.timeout(SO_SNDTIMEO) |
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} |
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pub fn set_broadcast(&self, broadcast: bool) -> io::Result<()> { |
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setsockopt(&self.inner, c::SOL_SOCKET, SO_BROADCAST, broadcast as c_int) |
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} |
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pub fn broadcast(&self) -> io::Result<bool> { |
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let raw: c_int = getsockopt(&self.inner, c::SOL_SOCKET, SO_BROADCAST)?; |
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Ok(raw != 0) |
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} |
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pub fn set_multicast_loop_v4(&self, multicast_loop_v4: bool) -> io::Result<()> { |
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setsockopt(&self.inner, c::IPPROTO_IP, c::IP_MULTICAST_LOOP, multicast_loop_v4 as c_int) |
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} |
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pub fn multicast_loop_v4(&self) -> io::Result<bool> { |
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let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_MULTICAST_LOOP)?; |
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Ok(raw != 0) |
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} |
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pub fn set_multicast_ttl_v4(&self, multicast_ttl_v4: u32) -> io::Result<()> { |
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setsockopt(&self.inner, c::IPPROTO_IP, c::IP_MULTICAST_TTL, multicast_ttl_v4 as c_int) |
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} |
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pub fn multicast_ttl_v4(&self) -> io::Result<u32> { |
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let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_MULTICAST_TTL)?; |
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Ok(raw as u32) |
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} |
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pub fn set_multicast_loop_v6(&self, multicast_loop_v6: bool) -> io::Result<()> { |
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setsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_MULTICAST_LOOP, multicast_loop_v6 as c_int) |
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} |
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pub fn multicast_loop_v6(&self) -> io::Result<bool> { |
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let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_MULTICAST_LOOP)?; |
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Ok(raw != 0) |
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} |
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pub fn join_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) |
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-> io::Result<()> { |
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let mreq = c::ip_mreq { |
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imr_multiaddr: *multiaddr.as_inner(), |
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imr_interface: *interface.as_inner(), |
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}; |
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setsockopt(&self.inner, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreq) |
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} |
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pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) |
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-> io::Result<()> { |
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let mreq = c::ipv6_mreq { |
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ipv6mr_multiaddr: *multiaddr.as_inner(), |
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ipv6mr_interface: to_ipv6mr_interface(interface), |
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}; |
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setsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, mreq) |
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} |
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pub fn leave_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) |
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-> io::Result<()> { |
|
let mreq = c::ip_mreq { |
|
imr_multiaddr: *multiaddr.as_inner(), |
|
imr_interface: *interface.as_inner(), |
|
}; |
|
setsockopt(&self.inner, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreq) |
|
} |
|
|
|
pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) |
|
-> io::Result<()> { |
|
let mreq = c::ipv6_mreq { |
|
ipv6mr_multiaddr: *multiaddr.as_inner(), |
|
ipv6mr_interface: to_ipv6mr_interface(interface), |
|
}; |
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setsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, mreq) |
|
} |
|
|
|
pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { |
|
setsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL, ttl as c_int) |
|
} |
|
|
|
pub fn ttl(&self) -> io::Result<u32> { |
|
let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL)?; |
|
Ok(raw as u32) |
|
} |
|
|
|
pub fn take_error(&self) -> io::Result<Option<io::Error>> { |
|
self.inner.take_error() |
|
} |
|
|
|
pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { |
|
self.inner.set_nonblocking(nonblocking) |
|
} |
|
|
|
pub fn recv(&self, buf: &mut [u8]) -> io::Result<usize> { |
|
self.inner.read(buf) |
|
} |
|
|
|
pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> { |
|
self.inner.peek(buf) |
|
} |
|
|
|
pub fn send(&self, buf: &[u8]) -> io::Result<usize> { |
|
let len = cmp::min(buf.len(), <wrlen_t>::max_value() as usize) as wrlen_t; |
|
let ret = cvt(unsafe { |
|
c::send(*self.inner.as_inner(), |
|
buf.as_ptr() as *const c_void, |
|
len, |
|
MSG_NOSIGNAL) |
|
})?; |
|
Ok(ret as usize) |
|
} |
|
|
|
pub fn connect(&self, addr: &SocketAddr) -> io::Result<()> { |
|
let (addrp, len) = addr.into_inner(); |
|
cvt_r(|| unsafe { c::connect(*self.inner.as_inner(), addrp, len) }).map(|_| ()) |
|
} |
|
} |
|
|
|
impl FromInner<Socket> for UdpSocket { |
|
fn from_inner(socket: Socket) -> UdpSocket { |
|
UdpSocket { inner: socket } |
|
} |
|
} |
|
|
|
impl fmt::Debug for UdpSocket { |
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
|
let mut res = f.debug_struct("UdpSocket"); |
|
|
|
if let Ok(addr) = self.socket_addr() { |
|
res.field("addr", &addr); |
|
} |
|
|
|
let name = if cfg!(windows) {"socket"} else {"fd"}; |
|
res.field(name, &self.inner.as_inner()) |
|
.finish() |
|
} |
|
} |
|
|
|
#[cfg(test)] |
|
mod tests { |
|
use super::*; |
|
use collections::HashMap; |
|
|
|
#[test] |
|
fn no_lookup_host_duplicates() { |
|
let mut addrs = HashMap::new(); |
|
let lh = match lookup_host("localhost") { |
|
Ok(lh) => lh, |
|
Err(e) => panic!("couldn't resolve `localhost': {}", e) |
|
}; |
|
let _na = lh.map(|sa| *addrs.entry(sa).or_insert(0) += 1).count(); |
|
assert!(addrs.values().filter(|&&v| v > 1).count() == 0); |
|
} |
|
}
|
|
|