use std::fmt;
use std::mem;
use std::net::{SocketAddrV4, SocketAddrV6, SocketAddr};
use std::ptr;
#[cfg(unix)]
use libc::{sockaddr, sockaddr_storage, sockaddr_in, sockaddr_in6, sa_family_t, socklen_t, AF_INET,
AF_INET6};
#[cfg(windows)]
use winapi::{SOCKADDR as sockaddr, SOCKADDR_STORAGE as sockaddr_storage,
SOCKADDR_IN as sockaddr_in, sockaddr_in6,
ADDRESS_FAMILY as sa_family_t, socklen_t, AF_INET, AF_INET6};
use SockAddr;
impl fmt::Debug for SockAddr {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
let mut builder = fmt.debug_struct("SockAddr");
builder.field("family", &self.family());
if let Some(addr) = self.as_inet() {
builder.field("inet", &addr);
} else if let Some(addr) = self.as_inet6() {
builder.field("inet6", &addr);
}
builder.finish()
}
}
impl SockAddr {
pub unsafe fn from_raw_parts(addr: *const sockaddr, len: socklen_t) -> SockAddr {
let mut storage = mem::uninitialized::<sockaddr_storage>();
ptr::copy_nonoverlapping(addr as *const _ as *const u8,
&mut storage as *mut _ as *mut u8,
len as usize);
SockAddr {
storage: storage,
len: len,
}
}
#[cfg(all(unix, feature = "unix"))]
pub fn unix<P>(path: P) -> ::std::io::Result<SockAddr>
where P: AsRef<::std::path::Path>
{
use std::cmp::Ordering;
use std::io;
use std::os::unix::ffi::OsStrExt;
use libc::{sockaddr_un, AF_UNIX, c_char};
unsafe {
let mut addr = mem::zeroed::<sockaddr_un>();
addr.sun_family = AF_UNIX as sa_family_t;
let bytes = path.as_ref().as_os_str().as_bytes();
match (bytes.get(0), bytes.len().cmp(&addr.sun_path.len())) {
(Some(&0), Ordering::Greater) => {
return Err(io::Error::new(io::ErrorKind::InvalidInput,
"path must be no longer than SUN_LEN"));
}
(Some(&0), _) => {}
(_, Ordering::Greater) | (_, Ordering::Equal) => {
return Err(io::Error::new(io::ErrorKind::InvalidInput,
"path must be shorter than SUN_LEN"));
}
_ => {}
}
for (dst, src) in addr.sun_path.iter_mut().zip(bytes) {
*dst = *src as c_char;
}
let base = &addr as *const _ as usize;
let path = &addr.sun_path as *const _ as usize;
let sun_path_offset = path - base;
let mut len = sun_path_offset + bytes.len();
match bytes.get(0) {
Some(&0) | None => {}
Some(_) => len += 1,
}
Ok(SockAddr::from_raw_parts(&addr as *const _ as *const _, len as socklen_t))
}
}
unsafe fn as_<T>(&self, family: sa_family_t) -> Option<T> {
if self.storage.ss_family != family {
return None;
}
Some(mem::transmute_copy(&self.storage))
}
pub fn as_inet(&self) -> Option<SocketAddrV4> {
unsafe { self.as_(AF_INET as sa_family_t) }
}
pub fn as_inet6(&self) -> Option<SocketAddrV6> {
unsafe { self.as_(AF_INET6 as sa_family_t) }
}
pub fn family(&self) -> sa_family_t {
self.storage.ss_family
}
pub fn len(&self) -> socklen_t {
self.len
}
pub fn as_ptr(&self) -> *const sockaddr {
&self.storage as *const _ as *const _
}
}
fn _size_checks(v4: SocketAddrV4, v6: SocketAddrV6) {
unsafe {
mem::transmute::<SocketAddrV4, sockaddr_in>(v4);
mem::transmute::<SocketAddrV6, sockaddr_in6>(v6);
}
}
impl From<SocketAddrV4> for SockAddr {
fn from(addr: SocketAddrV4) -> SockAddr {
unsafe {
SockAddr::from_raw_parts(&addr as *const _ as *const _,
mem::size_of::<SocketAddrV4>() as socklen_t)
}
}
}
impl From<SocketAddrV6> for SockAddr {
fn from(addr: SocketAddrV6) -> SockAddr {
unsafe {
SockAddr::from_raw_parts(&addr as *const _ as *const _,
mem::size_of::<SocketAddrV6>() as socklen_t)
}
}
}
impl From<SocketAddr> for SockAddr {
fn from(addr: SocketAddr) -> SockAddr {
match addr {
SocketAddr::V4(addr) => addr.into(),
SocketAddr::V6(addr) => addr.into(),
}
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn inet() {
let raw = "127.0.0.1:80".parse::<SocketAddrV4>().unwrap();
let addr = SockAddr::from(raw);
assert!(addr.as_inet6().is_none());
let addr = addr.as_inet().unwrap();
assert_eq!(raw, addr);
}
#[test]
fn inet6() {
let raw = "[2001:db8::ff00:42:8329]:80"
.parse::<SocketAddrV6>()
.unwrap();
let addr = SockAddr::from(raw);
assert!(addr.as_inet().is_none());
let addr = addr.as_inet6().unwrap();
assert_eq!(raw, addr);
}
}