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use {NixResult, NixError};
use super::{sa_family_t, in_addr, sockaddr_in, sockaddr_in6, sockaddr_un, AF_UNIX, AF_INET};
use errno::Errno;
use std::{mem, net, path, ptr};
use std::ffi::{AsOsStr, CStr, OsStr};
use std::os::unix::OsStrExt;
/// Represents a socket address
#[derive(Copy)]
pub enum SockAddr {
// TODO: Rename these variants IpV4, IpV6, Unix
SockIpV4(sockaddr_in),
SockIpV6(sockaddr_in6),
SockUnix(sockaddr_un)
}
/// A trait for values which can be converted or resolved to a SockAddr.
pub trait ToSockAddr {
/// Converts the value to a SockAddr
fn to_sock_addr(&self) -> NixResult<SockAddr>;
/// Converts and yields the value as a SockAddr
fn with_sock_addr<T, F: FnOnce(&SockAddr) -> T>(&self, action: F) -> NixResult<T> {
Ok(action(&try!(self.to_sock_addr())))
}
}
impl ToSockAddr for SockAddr {
fn to_sock_addr(&self) -> NixResult<SockAddr> {
Ok(*self)
}
fn with_sock_addr<T, F: FnOnce(&SockAddr) -> T>(&self, action: F) -> NixResult<T> {
Ok(action(self))
}
}
/// Convert a path into a unix domain socket address
impl ToSockAddr for path::Path {
fn to_sock_addr(&self) -> NixResult<SockAddr> {
let bytes = self.as_os_str().as_bytes();
Ok(SockAddr::SockUnix(unsafe {
let mut ret = sockaddr_un {
sun_family: AF_UNIX as sa_family_t,
.. mem::zeroed()
};
// Make sure the destination has enough capacity
if bytes.len() >= ret.sun_path.len() {
return Err(NixError::Sys(Errno::ENAMETOOLONG));
}
// Copy the path
ptr::copy_memory(
ret.sun_path.as_mut_ptr(),
bytes.as_ptr() as *const i8,
bytes.len());
ret
}))
}
}
/// Convert an inet address into a socket address
impl ToSockAddr for net::SocketAddr {
fn to_sock_addr(&self) -> NixResult<SockAddr> {
use std::net::IpAddr;
use std::num::Int;
match self.ip() {
IpAddr::V4(ip) => {
let addr = ip.octets();
Ok(SockAddr::SockIpV4(sockaddr_in {
sin_family: AF_INET as sa_family_t,
sin_port: self.port(),
sin_addr: in_addr {
s_addr: Int::from_be(
((addr[0] as u32) << 24) |
((addr[1] as u32) << 16) |
((addr[2] as u32) << 8) |
((addr[3] as u32) << 0))
},
.. unsafe { mem::zeroed() }
}))
}
_ => unimplemented!()
}
}
}
/// Convert from a socket address
pub trait FromSockAddr {
fn from_sock_addr(addr: &SockAddr) -> Option<Self>;
}
impl FromSockAddr for net::SocketAddr {
fn from_sock_addr(addr: &SockAddr) -> Option<net::SocketAddr> {
use std::net::{IpAddr, Ipv4Addr};
use std::num::Int;
match *addr {
SockAddr::SockIpV4(ref addr) => {
let ip = Int::from_be(addr.sin_addr.s_addr);
let ip = Ipv4Addr::new(
((ip >> 24) as u8) & 0xff,
((ip >> 16) as u8) & 0xff,
((ip >> 8) as u8) & 0xff,
((ip >> 0) as u8) & 0xff);
Some(net::SocketAddr::new(IpAddr::V4(ip), addr.sin_port))
}
SockAddr::SockIpV6(_) => unimplemented!(),
_ => None,
}
}
}
impl FromSockAddr for path::PathBuf {
fn from_sock_addr(addr: &SockAddr) -> Option<path::PathBuf> {
if let SockAddr::SockUnix(ref addr) = *addr {
unsafe {
let bytes = CStr::from_ptr(addr.sun_path.as_ptr()).to_bytes();
let osstr = <OsStr as OsStrExt>::from_bytes(bytes);
return Some(path::PathBuf::new(osstr));
}
}
None
}
}
|
