1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
17 use net::{lookup_host, ntoh, hton, Ipv4Addr, Ipv6Addr};
21 use sys::net::netc as c;
22 use sys_common::{FromInner, AsInner, IntoInner};
25 /// Representation of a socket address for networking applications.
27 /// A socket address can either represent the IPv4 or IPv6 protocol and is
28 /// paired with at least a port number as well. Each protocol may have more
29 /// specific information about the address available to it as well.
30 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
31 #[stable(feature = "rust1", since = "1.0.0")]
33 /// An IPv4 socket address which is a (ip, port) combination.
34 #[stable(feature = "rust1", since = "1.0.0")]
36 /// An IPv6 socket address
37 #[stable(feature = "rust1", since = "1.0.0")]
41 /// An IPv4 socket address which is a (ip, port) combination.
43 #[stable(feature = "rust1", since = "1.0.0")]
44 pub struct SocketAddrV4 { inner: c::sockaddr_in }
46 /// An IPv6 socket address.
48 #[stable(feature = "rust1", since = "1.0.0")]
49 pub struct SocketAddrV6 { inner: c::sockaddr_in6 }
52 /// Creates a new socket address from the (ip, port) pair.
53 #[unstable(feature = "ip_addr", reason = "recent addition", issue = "27801")]
54 #[rustc_deprecated(reason = "ip type too small a type to pull its weight",
57 pub fn new(ip: IpAddr, port: u16) -> SocketAddr {
59 IpAddr::V4(a) => SocketAddr::V4(SocketAddrV4::new(a, port)),
60 IpAddr::V6(a) => SocketAddr::V6(SocketAddrV6::new(a, port, 0, 0)),
64 /// Returns the IP address associated with this socket address.
65 #[unstable(feature = "ip_addr", reason = "recent addition", issue = "27801")]
66 #[rustc_deprecated(reason = "too small a type to pull its weight",
69 pub fn ip(&self) -> IpAddr {
71 SocketAddr::V4(ref a) => IpAddr::V4(*a.ip()),
72 SocketAddr::V6(ref a) => IpAddr::V6(*a.ip()),
76 /// Returns the port number associated with this socket address.
77 #[stable(feature = "rust1", since = "1.0.0")]
78 pub fn port(&self) -> u16 {
80 SocketAddr::V4(ref a) => a.port(),
81 SocketAddr::V6(ref a) => a.port(),
87 /// Creates a new socket address from the (ip, port) pair.
88 #[stable(feature = "rust1", since = "1.0.0")]
89 pub fn new(ip: Ipv4Addr, port: u16) -> SocketAddrV4 {
91 inner: c::sockaddr_in {
92 sin_family: c::AF_INET as c::sa_family_t,
94 sin_addr: *ip.as_inner(),
95 .. unsafe { mem::zeroed() }
100 /// Returns the IP address associated with this socket address.
101 #[stable(feature = "rust1", since = "1.0.0")]
102 pub fn ip(&self) -> &Ipv4Addr {
104 &*(&self.inner.sin_addr as *const c::in_addr as *const Ipv4Addr)
108 /// Returns the port number associated with this socket address.
109 #[stable(feature = "rust1", since = "1.0.0")]
110 pub fn port(&self) -> u16 { ntoh(self.inner.sin_port) }
114 /// Creates a new socket address from the ip/port/flowinfo/scope_id
116 #[stable(feature = "rust1", since = "1.0.0")]
117 pub fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32)
120 inner: c::sockaddr_in6 {
121 sin6_family: c::AF_INET6 as c::sa_family_t,
122 sin6_port: hton(port),
123 sin6_addr: *ip.as_inner(),
124 sin6_flowinfo: hton(flowinfo),
125 sin6_scope_id: hton(scope_id),
126 .. unsafe { mem::zeroed() }
131 /// Returns the IP address associated with this socket address.
132 #[stable(feature = "rust1", since = "1.0.0")]
133 pub fn ip(&self) -> &Ipv6Addr {
135 &*(&self.inner.sin6_addr as *const c::in6_addr as *const Ipv6Addr)
139 /// Returns the port number associated with this socket address.
140 #[stable(feature = "rust1", since = "1.0.0")]
141 pub fn port(&self) -> u16 { ntoh(self.inner.sin6_port) }
143 /// Returns scope ID associated with this address, corresponding to the
144 /// `sin6_flowinfo` field in C.
145 #[stable(feature = "rust1", since = "1.0.0")]
146 pub fn flowinfo(&self) -> u32 { ntoh(self.inner.sin6_flowinfo) }
148 /// Returns scope ID associated with this address, corresponding to the
149 /// `sin6_scope_id` field in C.
150 #[stable(feature = "rust1", since = "1.0.0")]
151 pub fn scope_id(&self) -> u32 { ntoh(self.inner.sin6_scope_id) }
154 impl FromInner<c::sockaddr_in> for SocketAddrV4 {
155 fn from_inner(addr: c::sockaddr_in) -> SocketAddrV4 {
156 SocketAddrV4 { inner: addr }
160 impl FromInner<c::sockaddr_in6> for SocketAddrV6 {
161 fn from_inner(addr: c::sockaddr_in6) -> SocketAddrV6 {
162 SocketAddrV6 { inner: addr }
166 impl<'a> IntoInner<(*const c::sockaddr, c::socklen_t)> for &'a SocketAddr {
167 fn into_inner(self) -> (*const c::sockaddr, c::socklen_t) {
169 SocketAddr::V4(ref a) => {
170 (a as *const _ as *const _, mem::size_of_val(a) as c::socklen_t)
172 SocketAddr::V6(ref a) => {
173 (a as *const _ as *const _, mem::size_of_val(a) as c::socklen_t)
179 #[stable(feature = "rust1", since = "1.0.0")]
180 impl fmt::Display for SocketAddr {
181 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
183 SocketAddr::V4(ref a) => a.fmt(f),
184 SocketAddr::V6(ref a) => a.fmt(f),
189 #[stable(feature = "rust1", since = "1.0.0")]
190 impl fmt::Display for SocketAddrV4 {
191 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
192 write!(f, "{}:{}", self.ip(), self.port())
196 #[stable(feature = "rust1", since = "1.0.0")]
197 impl fmt::Debug for SocketAddrV4 {
198 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
199 fmt::Display::fmt(self, fmt)
203 #[stable(feature = "rust1", since = "1.0.0")]
204 impl fmt::Display for SocketAddrV6 {
205 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
206 write!(f, "[{}]:{}", self.ip(), self.port())
210 #[stable(feature = "rust1", since = "1.0.0")]
211 impl fmt::Debug for SocketAddrV6 {
212 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
213 fmt::Display::fmt(self, fmt)
217 #[stable(feature = "rust1", since = "1.0.0")]
218 impl Clone for SocketAddrV4 {
219 fn clone(&self) -> SocketAddrV4 { *self }
221 #[stable(feature = "rust1", since = "1.0.0")]
222 impl Clone for SocketAddrV6 {
223 fn clone(&self) -> SocketAddrV6 { *self }
226 #[stable(feature = "rust1", since = "1.0.0")]
227 impl PartialEq for SocketAddrV4 {
228 fn eq(&self, other: &SocketAddrV4) -> bool {
229 self.inner.sin_port == other.inner.sin_port &&
230 self.inner.sin_addr.s_addr == other.inner.sin_addr.s_addr
233 #[stable(feature = "rust1", since = "1.0.0")]
234 impl PartialEq for SocketAddrV6 {
235 fn eq(&self, other: &SocketAddrV6) -> bool {
236 self.inner.sin6_port == other.inner.sin6_port &&
237 self.inner.sin6_addr.s6_addr == other.inner.sin6_addr.s6_addr &&
238 self.inner.sin6_flowinfo == other.inner.sin6_flowinfo &&
239 self.inner.sin6_scope_id == other.inner.sin6_scope_id
242 #[stable(feature = "rust1", since = "1.0.0")]
243 impl Eq for SocketAddrV4 {}
244 #[stable(feature = "rust1", since = "1.0.0")]
245 impl Eq for SocketAddrV6 {}
247 #[stable(feature = "rust1", since = "1.0.0")]
248 impl hash::Hash for SocketAddrV4 {
249 fn hash<H: hash::Hasher>(&self, s: &mut H) {
250 (self.inner.sin_port, self.inner.sin_addr.s_addr).hash(s)
253 #[stable(feature = "rust1", since = "1.0.0")]
254 impl hash::Hash for SocketAddrV6 {
255 fn hash<H: hash::Hasher>(&self, s: &mut H) {
256 (self.inner.sin6_port, &self.inner.sin6_addr.s6_addr,
257 self.inner.sin6_flowinfo, self.inner.sin6_scope_id).hash(s)
261 /// A trait for objects which can be converted or resolved to one or more
262 /// `SocketAddr` values.
264 /// This trait is used for generic address resolution when constructing network
265 /// objects. By default it is implemented for the following types:
267 /// * `SocketAddr`, `SocketAddrV4`, `SocketAddrV6` - `to_socket_addrs` is
268 /// identity function.
270 /// * `(IpvNAddr, u16)` - `to_socket_addrs` constructs `SocketAddr` trivially.
272 /// * `(&str, u16)` - the string should be either a string representation of an
273 /// IP address expected by `FromStr` implementation for `IpvNAddr` or a host
276 /// * `&str` - the string should be either a string representation of a
277 /// `SocketAddr` as expected by its `FromStr` implementation or a string like
278 /// `<host_name>:<port>` pair where `<port>` is a `u16` value.
280 /// This trait allows constructing network objects like `TcpStream` or
281 /// `UdpSocket` easily with values of various types for the bind/connection
282 /// address. It is needed because sometimes one type is more appropriate than
283 /// the other: for simple uses a string like `"localhost:12345"` is much nicer
284 /// than manual construction of the corresponding `SocketAddr`, but sometimes
285 /// `SocketAddr` value is *the* main source of the address, and converting it to
286 /// some other type (e.g. a string) just for it to be converted back to
287 /// `SocketAddr` in constructor methods is pointless.
292 /// use std::net::{SocketAddrV4, TcpStream, UdpSocket, TcpListener, Ipv4Addr};
295 /// let ip = Ipv4Addr::new(127, 0, 0, 1);
296 /// let port = 12345;
298 /// // The following lines are equivalent modulo possible "localhost" name
299 /// // resolution differences
300 /// let tcp_s = TcpStream::connect(SocketAddrV4::new(ip, port));
301 /// let tcp_s = TcpStream::connect((ip, port));
302 /// let tcp_s = TcpStream::connect(("127.0.0.1", port));
303 /// let tcp_s = TcpStream::connect(("localhost", port));
304 /// let tcp_s = TcpStream::connect("127.0.0.1:12345");
305 /// let tcp_s = TcpStream::connect("localhost:12345");
307 /// // TcpListener::bind(), UdpSocket::bind() and UdpSocket::send_to()
308 /// // behave similarly
309 /// let tcp_l = TcpListener::bind("localhost:12345");
311 /// let mut udp_s = UdpSocket::bind(("127.0.0.1", port)).unwrap();
312 /// udp_s.send_to(&[7], (ip, 23451)).unwrap();
315 #[stable(feature = "rust1", since = "1.0.0")]
316 pub trait ToSocketAddrs {
317 /// Returned iterator over socket addresses which this type may correspond
319 #[stable(feature = "rust1", since = "1.0.0")]
320 type Iter: Iterator<Item=SocketAddr>;
322 /// Converts this object to an iterator of resolved `SocketAddr`s.
324 /// The returned iterator may not actually yield any values depending on the
325 /// outcome of any resolution performed.
327 /// Note that this function may block the current thread while resolution is
332 /// Any errors encountered during resolution will be returned as an `Err`.
333 #[stable(feature = "rust1", since = "1.0.0")]
334 fn to_socket_addrs(&self) -> io::Result<Self::Iter>;
337 #[stable(feature = "rust1", since = "1.0.0")]
338 impl ToSocketAddrs for SocketAddr {
339 type Iter = option::IntoIter<SocketAddr>;
340 fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
341 Ok(Some(*self).into_iter())
345 #[stable(feature = "rust1", since = "1.0.0")]
346 impl ToSocketAddrs for SocketAddrV4 {
347 type Iter = option::IntoIter<SocketAddr>;
348 fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
349 SocketAddr::V4(*self).to_socket_addrs()
353 #[stable(feature = "rust1", since = "1.0.0")]
354 impl ToSocketAddrs for SocketAddrV6 {
355 type Iter = option::IntoIter<SocketAddr>;
356 fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
357 SocketAddr::V6(*self).to_socket_addrs()
361 #[stable(feature = "rust1", since = "1.0.0")]
363 impl ToSocketAddrs for (IpAddr, u16) {
364 type Iter = option::IntoIter<SocketAddr>;
365 fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
366 let (ip, port) = *self;
368 IpAddr::V4(ref a) => (*a, port).to_socket_addrs(),
369 IpAddr::V6(ref a) => (*a, port).to_socket_addrs(),
374 #[stable(feature = "rust1", since = "1.0.0")]
375 impl ToSocketAddrs for (Ipv4Addr, u16) {
376 type Iter = option::IntoIter<SocketAddr>;
377 fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
378 let (ip, port) = *self;
379 SocketAddrV4::new(ip, port).to_socket_addrs()
383 #[stable(feature = "rust1", since = "1.0.0")]
384 impl ToSocketAddrs for (Ipv6Addr, u16) {
385 type Iter = option::IntoIter<SocketAddr>;
386 fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
387 let (ip, port) = *self;
388 SocketAddrV6::new(ip, port, 0, 0).to_socket_addrs()
392 fn resolve_socket_addr(s: &str, p: u16) -> io::Result<vec::IntoIter<SocketAddr>> {
393 let ips = try!(lookup_host(s));
394 let v: Vec<_> = try!(ips.map(|a| {
397 SocketAddr::V4(ref a) => {
398 SocketAddr::V4(SocketAddrV4::new(*a.ip(), p))
400 SocketAddr::V6(ref a) => {
401 SocketAddr::V6(SocketAddrV6::new(*a.ip(), p, a.flowinfo(),
410 #[stable(feature = "rust1", since = "1.0.0")]
411 impl<'a> ToSocketAddrs for (&'a str, u16) {
412 type Iter = vec::IntoIter<SocketAddr>;
413 fn to_socket_addrs(&self) -> io::Result<vec::IntoIter<SocketAddr>> {
414 let (host, port) = *self;
416 // try to parse the host as a regular IP address first
417 if let Ok(addr) = host.parse::<Ipv4Addr>() {
418 let addr = SocketAddrV4::new(addr, port);
419 return Ok(vec![SocketAddr::V4(addr)].into_iter())
421 if let Ok(addr) = host.parse::<Ipv6Addr>() {
422 let addr = SocketAddrV6::new(addr, port, 0, 0);
423 return Ok(vec![SocketAddr::V6(addr)].into_iter())
426 resolve_socket_addr(host, port)
430 // accepts strings like 'localhost:12345'
431 #[stable(feature = "rust1", since = "1.0.0")]
432 impl ToSocketAddrs for str {
433 type Iter = vec::IntoIter<SocketAddr>;
434 fn to_socket_addrs(&self) -> io::Result<vec::IntoIter<SocketAddr>> {
435 // try to parse as a regular SocketAddr first
436 match self.parse().ok() {
437 Some(addr) => return Ok(vec![addr].into_iter()),
441 macro_rules! try_opt {
442 ($e:expr, $msg:expr) => (
445 None => return Err(io::Error::new(io::ErrorKind::InvalidInput,
451 // split the string by ':' and convert the second part to u16
452 let mut parts_iter = self.rsplitn(2, ':');
453 let port_str = try_opt!(parts_iter.next(), "invalid socket address");
454 let host = try_opt!(parts_iter.next(), "invalid socket address");
455 let port: u16 = try_opt!(port_str.parse().ok(), "invalid port value");
456 resolve_socket_addr(host, port)
460 #[stable(feature = "rust1", since = "1.0.0")]
461 impl<'a, T: ToSocketAddrs + ?Sized> ToSocketAddrs for &'a T {
463 fn to_socket_addrs(&self) -> io::Result<T::Iter> {
464 (**self).to_socket_addrs()
472 use net::test::{tsa, sa6, sa4};
475 fn to_socket_addr_ipaddr_u16() {
476 let a = Ipv4Addr::new(77, 88, 21, 11);
478 let e = SocketAddr::V4(SocketAddrV4::new(a, p));
479 assert_eq!(Ok(vec![e]), tsa((a, p)));
483 fn to_socket_addr_str_u16() {
484 let a = sa4(Ipv4Addr::new(77, 88, 21, 11), 24352);
485 assert_eq!(Ok(vec![a]), tsa(("77.88.21.11", 24352)));
487 let a = sa6(Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), 53);
488 assert_eq!(Ok(vec![a]), tsa(("2a02:6b8:0:1::1", 53)));
490 let a = sa4(Ipv4Addr::new(127, 0, 0, 1), 23924);
491 assert!(tsa(("localhost", 23924)).unwrap().contains(&a));
495 fn to_socket_addr_str() {
496 let a = sa4(Ipv4Addr::new(77, 88, 21, 11), 24352);
497 assert_eq!(Ok(vec![a]), tsa("77.88.21.11:24352"));
499 let a = sa6(Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), 53);
500 assert_eq!(Ok(vec![a]), tsa("[2a02:6b8:0:1::1]:53"));
502 let a = sa4(Ipv4Addr::new(127, 0, 0, 1), 23924);
503 assert!(tsa("localhost:23924").unwrap().contains(&a));
506 // FIXME: figure out why this fails on openbsd and bitrig and fix it
508 #[cfg(not(any(windows, target_os = "openbsd", target_os = "bitrig")))]
509 fn to_socket_addr_str_bad() {
510 assert!(tsa("1200::AB00:1234::2552:7777:1313:34300").is_err());