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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::fmt;
use std::io;
use std::mem;
use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
#[cfg(any(unix, target_os = "wasi"))]
use libc::c_int;
#[cfg(windows)]
use winapi::ctypes::c_int;
use sys;
use sys::c;
pub struct Socket {
inner: sys::Socket,
}
impl Socket {
pub fn new(family: c_int, ty: c_int) -> io::Result<Socket> {
Ok(Socket { inner: try!(sys::Socket::new(family, ty)) })
}
pub fn bind(&self, addr: &SocketAddr) -> io::Result<()> {
let (addr, len) = addr2raw(addr);
unsafe {
::cvt(c::bind(self.inner.raw(), addr.as_ptr(), len as c::socklen_t)).map(|_| ())
}
}
pub fn listen(&self, backlog: i32) -> io::Result<()> {
unsafe {
::cvt(c::listen(self.inner.raw(), backlog)).map(|_| ())
}
}
pub fn connect(&self, addr: &SocketAddr) -> io::Result<()> {
let (addr, len) = addr2raw(addr);
unsafe {
::cvt(c::connect(self.inner.raw(), addr.as_ptr(), len)).map(|_| ())
}
}
pub fn getsockname(&self) -> io::Result<SocketAddr> {
unsafe {
let mut storage: c::sockaddr_storage = mem::zeroed();
let mut len = mem::size_of_val(&storage) as c::socklen_t;
try!(::cvt(c::getsockname(self.inner.raw(),
&mut storage as *mut _ as *mut _,
&mut len)));
raw2addr(&storage, len)
}
}
}
impl fmt::Debug for Socket {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.inner.raw().fmt(f)
}
}
impl ::AsInner for Socket {
type Inner = sys::Socket;
fn as_inner(&self) -> &sys::Socket { &self.inner }
}
impl ::FromInner for Socket {
type Inner = sys::Socket;
fn from_inner(sock: sys::Socket) -> Socket {
Socket { inner: sock }
}
}
impl ::IntoInner for Socket {
type Inner = sys::Socket;
fn into_inner(self) -> sys::Socket { self.inner }
}
/// A type with the same memory layout as `c::sockaddr`. Used in converting Rust level
/// SocketAddr* types into their system representation. The benefit of this specific
/// type over using `c::sockaddr_storage` is that this type is exactly as large as it
/// needs to be and not a lot larger.
#[repr(C)]
pub(crate) union SocketAddrCRepr {
v4: c::sockaddr_in,
v6: c::sockaddr_in6,
}
impl SocketAddrCRepr {
pub(crate) fn as_ptr(&self) -> *const c::sockaddr {
self as *const _ as *const c::sockaddr
}
}
fn addr2raw(addr: &SocketAddr) -> (SocketAddrCRepr, c::socklen_t) {
match addr {
&SocketAddr::V4(ref v4) => addr2raw_v4(v4),
&SocketAddr::V6(ref v6) => addr2raw_v6(v6),
}
}
#[cfg(unix)]
fn addr2raw_v4(addr: &SocketAddrV4) -> (SocketAddrCRepr, c::socklen_t) {
let sin_addr = c::in_addr {
s_addr: u32::from(*addr.ip()).to_be(),
};
let sockaddr = SocketAddrCRepr {
v4: c::sockaddr_in {
sin_family: c::AF_INET as c::sa_family_t,
sin_port: addr.port().to_be(),
sin_addr,
#[cfg(not(target_os = "haiku"))]
sin_zero: [0; 8],
#[cfg(target_os = "haiku")]
sin_zero: [0; 24],
#[cfg(any(
target_os = "dragonfly",
target_os = "freebsd",
target_os = "ios",
target_os = "macos",
target_os = "netbsd",
target_os = "openbsd",
target_os = "haiku",
))]
sin_len: 0,
},
};
(sockaddr, mem::size_of::<c::sockaddr_in>() as c::socklen_t)
}
#[cfg(windows)]
fn addr2raw_v4(addr: &SocketAddrV4) -> (SocketAddrCRepr, c::socklen_t) {
let sin_addr = unsafe {
let mut s_un = mem::zeroed::<c::in_addr_S_un>();
*s_un.S_addr_mut() = u32::from(*addr.ip()).to_be();
c::IN_ADDR { S_un: s_un }
};
let sockaddr = SocketAddrCRepr {
v4: c::sockaddr_in {
sin_family: c::AF_INET as c::sa_family_t,
sin_port: addr.port().to_be(),
sin_addr,
sin_zero: [0; 8],
},
};
(sockaddr, mem::size_of::<c::sockaddr_in>() as c::socklen_t)
}
#[cfg(unix)]
fn addr2raw_v6(addr: &SocketAddrV6) -> (SocketAddrCRepr, c::socklen_t) {
let sin6_addr = {
let mut sin6_addr = unsafe { mem::zeroed::<c::in6_addr>() };
sin6_addr.s6_addr = addr.ip().octets();
sin6_addr
};
let sockaddr = SocketAddrCRepr {
v6: c::sockaddr_in6 {
sin6_family: c::AF_INET6 as c::sa_family_t,
sin6_port: addr.port().to_be(),
sin6_addr,
sin6_flowinfo: addr.flowinfo(),
sin6_scope_id: addr.scope_id(),
#[cfg(any(
target_os = "dragonfly",
target_os = "freebsd",
target_os = "ios",
target_os = "macos",
target_os = "netbsd",
target_os = "openbsd",
target_os = "haiku",
))]
sin6_len: 0,
#[cfg(any(target_os = "solaris", target_os = "illumos"))]
__sin6_src_id: 0,
},
};
(sockaddr, mem::size_of::<c::sockaddr_in6>() as c::socklen_t)
}
#[cfg(windows)]
fn addr2raw_v6(addr: &SocketAddrV6) -> (SocketAddrCRepr, c::socklen_t) {
let sin6_addr = unsafe {
let mut u = mem::zeroed::<c::in6_addr_u>();
*u.Byte_mut() = addr.ip().octets();
c::IN6_ADDR { u }
};
let scope_id = unsafe {
let mut u = mem::zeroed::<c::SOCKADDR_IN6_LH_u>();
*u.sin6_scope_id_mut() = addr.scope_id();
u
};
let sockaddr = SocketAddrCRepr {
v6: c::sockaddr_in6 {
sin6_family: c::AF_INET6 as c::sa_family_t,
sin6_port: addr.port().to_be(),
sin6_addr,
sin6_flowinfo: addr.flowinfo(),
u: scope_id,
},
};
(sockaddr, mem::size_of::<c::sockaddr_in6>() as c::socklen_t)
}
fn raw2addr(storage: &c::sockaddr_storage, len: c::socklen_t) -> io::Result<SocketAddr> {
match storage.ss_family as c_int {
c::AF_INET => {
unsafe {
assert!(len as usize >= mem::size_of::<c::sockaddr_in>());
let sa = storage as *const _ as *const c::sockaddr_in;
let bits = c::sockaddr_in_u32(&(*sa));
let ip = Ipv4Addr::new((bits >> 24) as u8,
(bits >> 16) as u8,
(bits >> 8) as u8,
bits as u8);
Ok(SocketAddr::V4(SocketAddrV4::new(ip, ::ntoh((*sa).sin_port))))
}
}
c::AF_INET6 => {
unsafe {
assert!(len as usize >= mem::size_of::<c::sockaddr_in6>());
let sa = storage as *const _ as *const c::sockaddr_in6;
#[cfg(windows)] let arr = (*sa).sin6_addr.u.Byte();
#[cfg(not(windows))] let arr = (*sa).sin6_addr.s6_addr;
let ip = Ipv6Addr::new(
(arr[0] as u16) << 8 | (arr[1] as u16),
(arr[2] as u16) << 8 | (arr[3] as u16),
(arr[4] as u16) << 8 | (arr[5] as u16),
(arr[6] as u16) << 8 | (arr[7] as u16),
(arr[8] as u16) << 8 | (arr[9] as u16),
(arr[10] as u16) << 8 | (arr[11] as u16),
(arr[12] as u16) << 8 | (arr[13] as u16),
(arr[14] as u16) << 8 | (arr[15] as u16),
);
#[cfg(windows)] let sin6_scope_id = *(*sa).u.sin6_scope_id();
#[cfg(not(windows))] let sin6_scope_id = (*sa).sin6_scope_id;
Ok(SocketAddr::V6(SocketAddrV6::new(ip,
::ntoh((*sa).sin6_port),
(*sa).sin6_flowinfo,
sin6_scope_id)))
}
}
_ => Err(io::Error::new(io::ErrorKind::InvalidInput, "invalid argument")),
}
}