503 lines
16 KiB
Rust
503 lines
16 KiB
Rust
// 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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use prelude::v1::*;
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use cmp;
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use ffi::{CStr, 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_char, c_void};
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use mem;
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#[allow(deprecated)]
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use net::{SocketAddr, Shutdown, IpAddr};
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use ptr;
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use str::from_utf8;
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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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////////////////////////////////////////////////////////////////////////////////
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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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try!(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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try!(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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try!(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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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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////////////////////////////////////////////////////////////////////////////////
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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 = io::Result<SocketAddr>;
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fn next(&mut self) -> Option<io::Result<SocketAddr>> {
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unsafe {
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if self.cur.is_null() { return None }
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let ret = sockaddr_to_addr(mem::transmute((*self.cur).ai_addr),
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(*self.cur).ai_addrlen as usize);
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self.cur = (*self.cur).ai_next as *mut c::addrinfo;
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Some(ret)
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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 = try!(CString::new(host));
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let mut res = ptr::null_mut();
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unsafe {
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try!(cvt_gai(c::getaddrinfo(c_host.as_ptr(), ptr::null(), ptr::null(),
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&mut res)));
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Ok(LookupHost { original: res, cur: res })
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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// lookup_addr
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////////////////////////////////////////////////////////////////////////////////
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#[allow(deprecated)]
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pub fn lookup_addr(addr: &IpAddr) -> io::Result<String> {
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init();
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let saddr = SocketAddr::new(*addr, 0);
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let (inner, len) = saddr.into_inner();
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let mut hostbuf = [0 as c_char; c::NI_MAXHOST as usize];
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let data = unsafe {
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try!(cvt_gai(c::getnameinfo(inner, len,
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hostbuf.as_mut_ptr(),
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c::NI_MAXHOST,
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ptr::null_mut(), 0, 0)));
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CStr::from_ptr(hostbuf.as_ptr())
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};
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match from_utf8(data.to_bytes()) {
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Ok(name) => Ok(name.to_owned()),
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Err(_) => Err(io::Error::new(io::ErrorKind::Other,
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"failed to lookup address information"))
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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 = try!(Socket::new(addr, c::SOCK_STREAM));
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let (addrp, len) = addr.into_inner();
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try!(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 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, c::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, c::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(c::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(c::SO_SNDTIMEO)
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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 = try!(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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0)
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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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setsockopt(&self.inner, c::IPPROTO_TCP, c::TCP_NODELAY, nodelay as c_int)
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}
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pub fn nodelay(&self) -> io::Result<bool> {
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let raw: c_int = try!(getsockopt(&self.inner, c::IPPROTO_TCP, c::TCP_NODELAY));
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Ok(raw != 0)
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}
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pub fn set_keepalive(&self, keepalive: Option<Duration>) -> io::Result<()> {
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self.inner.set_keepalive(keepalive)
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}
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pub fn keepalive(&self) -> io::Result<Option<Duration>> {
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self.inner.keepalive()
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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 = try!(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, c::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 = try!(getsockopt(&self.inner, c::IPPROTO_IPV6, c::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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let raw: c_int = try!(getsockopt(&self.inner, c::SOL_SOCKET, c::SO_ERROR));
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if raw == 0 {
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Ok(None)
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} else {
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Ok(Some(io::Error::from_raw_os_error(raw as i32)))
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}
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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 = try!(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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try!(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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try!(cvt(unsafe { c::bind(*sock.as_inner(), addrp, len) }));
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// Start listening
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try!(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 = try!(self.inner.accept(&mut storage as *mut _ as *mut _,
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&mut len));
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let addr = try!(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 = try!(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, c::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 = try!(getsockopt(&self.inner, c::IPPROTO_IPV6, c::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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let raw: c_int = try!(getsockopt(&self.inner, c::SOL_SOCKET, c::SO_ERROR));
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if raw == 0 {
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Ok(None)
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} else {
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Ok(Some(io::Error::from_raw_os_error(raw as i32)))
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}
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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 = try!(Socket::new(addr, c::SOCK_DGRAM));
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let (addrp, len) = addr.into_inner();
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try!(cvt(unsafe { c::bind(*sock.as_inner(), addrp, len) }));
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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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let mut storage: c::sockaddr_storage = unsafe { mem::zeroed() };
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let mut addrlen = mem::size_of_val(&storage) as c::socklen_t;
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let len = cmp::min(buf.len(), <wrlen_t>::max_value() as usize) as wrlen_t;
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let n = try!(cvt(unsafe {
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c::recvfrom(*self.inner.as_inner(),
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buf.as_mut_ptr() as *mut c_void,
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len, 0,
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&mut storage as *mut _ as *mut _, &mut addrlen)
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}));
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Ok((n as usize, try!(sockaddr_to_addr(&storage, addrlen as usize))))
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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 = try!(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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0, 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, c::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, c::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(c::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(c::SO_SNDTIMEO)
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}
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}
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impl FromInner<Socket> for UdpSocket {
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fn from_inner(socket: Socket) -> UdpSocket {
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UdpSocket { inner: socket }
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}
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}
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impl fmt::Debug for UdpSocket {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let mut res = f.debug_struct("UdpSocket");
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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())
|
|
.finish()
|
|
}
|
|
}
|