core/net/
socket_addr.rs

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1use super::display_buffer::DisplayBuffer;
2use crate::fmt::{self, Write};
3use crate::net::{IpAddr, Ipv4Addr, Ipv6Addr};
4
5/// An internet socket address, either IPv4 or IPv6.
6///
7/// Internet socket addresses consist of an [IP address], a 16-bit port number, as well
8/// as possibly some version-dependent additional information. See [`SocketAddrV4`]'s and
9/// [`SocketAddrV6`]'s respective documentation for more details.
10///
11/// [IP address]: IpAddr
12///
13/// # Portability
14///
15/// `SocketAddr` is intended to be a portable representation of socket addresses and is likely not
16/// the same as the internal socket address type used by the target operating system's API. Like all
17/// `repr(Rust)` structs, however, its exact layout remains undefined and should not be relied upon
18/// between builds.
19///
20/// # Examples
21///
22/// ```
23/// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
24///
25/// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
26///
27/// assert_eq!("127.0.0.1:8080".parse(), Ok(socket));
28/// assert_eq!(socket.port(), 8080);
29/// assert_eq!(socket.is_ipv4(), true);
30/// ```
31#[derive(Copy, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
32#[stable(feature = "rust1", since = "1.0.0")]
33pub enum SocketAddr {
34    /// An IPv4 socket address.
35    #[stable(feature = "rust1", since = "1.0.0")]
36    V4(#[stable(feature = "rust1", since = "1.0.0")] SocketAddrV4),
37    /// An IPv6 socket address.
38    #[stable(feature = "rust1", since = "1.0.0")]
39    V6(#[stable(feature = "rust1", since = "1.0.0")] SocketAddrV6),
40}
41
42/// An IPv4 socket address.
43///
44/// IPv4 socket addresses consist of an [`IPv4` address] and a 16-bit port number, as
45/// stated in [IETF RFC 793].
46///
47/// See [`SocketAddr`] for a type encompassing both IPv4 and IPv6 socket addresses.
48///
49/// [IETF RFC 793]: https://tools.ietf.org/html/rfc793
50/// [`IPv4` address]: Ipv4Addr
51///
52/// # Portability
53///
54/// `SocketAddrV4` is intended to be a portable representation of socket addresses and is likely not
55/// the same as the internal socket address type used by the target operating system's API. Like all
56/// `repr(Rust)` structs, however, its exact layout remains undefined and should not be relied upon
57/// between builds.
58///
59/// # Textual representation
60///
61/// `SocketAddrV4` provides a [`FromStr`](crate::str::FromStr) implementation.
62/// It accepts an IPv4 address in its [textual representation], followed by a
63/// single `:`, followed by the port encoded as a decimal integer.  Other
64/// formats are not accepted.
65///
66/// [textual representation]: Ipv4Addr#textual-representation
67///
68/// # Examples
69///
70/// ```
71/// use std::net::{Ipv4Addr, SocketAddrV4};
72///
73/// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
74///
75/// assert_eq!("127.0.0.1:8080".parse(), Ok(socket));
76/// assert_eq!(socket.ip(), &Ipv4Addr::new(127, 0, 0, 1));
77/// assert_eq!(socket.port(), 8080);
78/// ```
79#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
80#[stable(feature = "rust1", since = "1.0.0")]
81pub struct SocketAddrV4 {
82    ip: Ipv4Addr,
83    port: u16,
84}
85
86/// An IPv6 socket address.
87///
88/// IPv6 socket addresses consist of an [`IPv6` address], a 16-bit port number, as well
89/// as fields containing the traffic class, the flow label, and a scope identifier
90/// (see [IETF RFC 2553, Section 3.3] for more details).
91///
92/// See [`SocketAddr`] for a type encompassing both IPv4 and IPv6 socket addresses.
93///
94/// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
95/// [`IPv6` address]: Ipv6Addr
96///
97/// # Portability
98///
99/// `SocketAddrV6` is intended to be a portable representation of socket addresses and is likely not
100/// the same as the internal socket address type used by the target operating system's API. Like all
101/// `repr(Rust)` structs, however, its exact layout remains undefined and should not be relied upon
102/// between builds.
103///
104/// # Textual representation
105///
106/// `SocketAddrV6` provides a [`FromStr`](crate::str::FromStr) implementation,
107/// based on the bracketed format recommended by [IETF RFC 5952],
108/// with scope identifiers based on those specified in [IETF RFC 4007].
109///
110/// It accepts addresses consisting of the following elements, in order:
111///   - A left square bracket (`[`)
112///   - The [textual representation] of an IPv6 address
113///   - _Optionally_, a percent sign (`%`) followed by the scope identifier
114///     encoded as a decimal integer
115///   - A right square bracket (`]`)
116///   - A colon (`:`)
117///   - The port, encoded as a decimal integer.
118///
119/// For example, the string `[2001:db8::413]:443` represents a `SocketAddrV6`
120/// with the address `2001:db8::413` and port `443`.  The string
121/// `[2001:db8::413%612]:443` represents the same address and port, with a
122/// scope identifier of `612`.
123///
124/// Other formats are not accepted.
125///
126/// [IETF RFC 5952]: https://tools.ietf.org/html/rfc5952#section-6
127/// [IETF RFC 4007]: https://tools.ietf.org/html/rfc4007#section-11
128/// [textual representation]: Ipv6Addr#textual-representation
129///
130/// # Examples
131///
132/// ```
133/// use std::net::{Ipv6Addr, SocketAddrV6};
134///
135/// let socket = SocketAddrV6::new(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
136///
137/// assert_eq!("[2001:db8::1]:8080".parse(), Ok(socket));
138/// assert_eq!(socket.ip(), &Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1));
139/// assert_eq!(socket.port(), 8080);
140///
141/// let mut with_scope = socket.clone();
142/// with_scope.set_scope_id(3);
143/// assert_eq!("[2001:db8::1%3]:8080".parse(), Ok(with_scope));
144/// ```
145#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
146#[stable(feature = "rust1", since = "1.0.0")]
147pub struct SocketAddrV6 {
148    ip: Ipv6Addr,
149    port: u16,
150    flowinfo: u32,
151    scope_id: u32,
152}
153
154impl SocketAddr {
155    /// Creates a new socket address from an [IP address] and a port number.
156    ///
157    /// [IP address]: IpAddr
158    ///
159    /// # Examples
160    ///
161    /// ```
162    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
163    ///
164    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
165    /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)));
166    /// assert_eq!(socket.port(), 8080);
167    /// ```
168    #[stable(feature = "ip_addr", since = "1.7.0")]
169    #[must_use]
170    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
171    #[inline]
172    pub const fn new(ip: IpAddr, port: u16) -> SocketAddr {
173        match ip {
174            IpAddr::V4(a) => SocketAddr::V4(SocketAddrV4::new(a, port)),
175            IpAddr::V6(a) => SocketAddr::V6(SocketAddrV6::new(a, port, 0, 0)),
176        }
177    }
178
179    /// Returns the IP address associated with this socket address.
180    ///
181    /// # Examples
182    ///
183    /// ```
184    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
185    ///
186    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
187    /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)));
188    /// ```
189    #[must_use]
190    #[stable(feature = "ip_addr", since = "1.7.0")]
191    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
192    #[inline]
193    pub const fn ip(&self) -> IpAddr {
194        match *self {
195            SocketAddr::V4(ref a) => IpAddr::V4(*a.ip()),
196            SocketAddr::V6(ref a) => IpAddr::V6(*a.ip()),
197        }
198    }
199
200    /// Changes the IP address associated with this socket address.
201    ///
202    /// # Examples
203    ///
204    /// ```
205    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
206    ///
207    /// let mut socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
208    /// socket.set_ip(IpAddr::V4(Ipv4Addr::new(10, 10, 0, 1)));
209    /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(10, 10, 0, 1)));
210    /// ```
211    #[inline]
212    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
213    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
214    pub const fn set_ip(&mut self, new_ip: IpAddr) {
215        // `match (*self, new_ip)` would have us mutate a copy of self only to throw it away.
216        match (self, new_ip) {
217            (&mut SocketAddr::V4(ref mut a), IpAddr::V4(new_ip)) => a.set_ip(new_ip),
218            (&mut SocketAddr::V6(ref mut a), IpAddr::V6(new_ip)) => a.set_ip(new_ip),
219            (self_, new_ip) => *self_ = Self::new(new_ip, self_.port()),
220        }
221    }
222
223    /// Returns the port number associated with this socket address.
224    ///
225    /// # Examples
226    ///
227    /// ```
228    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
229    ///
230    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
231    /// assert_eq!(socket.port(), 8080);
232    /// ```
233    #[must_use]
234    #[stable(feature = "rust1", since = "1.0.0")]
235    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
236    #[inline]
237    pub const fn port(&self) -> u16 {
238        match *self {
239            SocketAddr::V4(ref a) => a.port(),
240            SocketAddr::V6(ref a) => a.port(),
241        }
242    }
243
244    /// Changes the port number associated with this socket address.
245    ///
246    /// # Examples
247    ///
248    /// ```
249    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
250    ///
251    /// let mut socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
252    /// socket.set_port(1025);
253    /// assert_eq!(socket.port(), 1025);
254    /// ```
255    #[inline]
256    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
257    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
258    pub const fn set_port(&mut self, new_port: u16) {
259        match *self {
260            SocketAddr::V4(ref mut a) => a.set_port(new_port),
261            SocketAddr::V6(ref mut a) => a.set_port(new_port),
262        }
263    }
264
265    /// Returns [`true`] if the [IP address] in this `SocketAddr` is an
266    /// [`IPv4` address], and [`false`] otherwise.
267    ///
268    /// [IP address]: IpAddr
269    /// [`IPv4` address]: IpAddr::V4
270    ///
271    /// # Examples
272    ///
273    /// ```
274    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
275    ///
276    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
277    /// assert_eq!(socket.is_ipv4(), true);
278    /// assert_eq!(socket.is_ipv6(), false);
279    /// ```
280    #[must_use]
281    #[stable(feature = "sockaddr_checker", since = "1.16.0")]
282    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
283    #[inline]
284    pub const fn is_ipv4(&self) -> bool {
285        matches!(*self, SocketAddr::V4(_))
286    }
287
288    /// Returns [`true`] if the [IP address] in this `SocketAddr` is an
289    /// [`IPv6` address], and [`false`] otherwise.
290    ///
291    /// [IP address]: IpAddr
292    /// [`IPv6` address]: IpAddr::V6
293    ///
294    /// # Examples
295    ///
296    /// ```
297    /// use std::net::{IpAddr, Ipv6Addr, SocketAddr};
298    ///
299    /// let socket = SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 65535, 0, 1)), 8080);
300    /// assert_eq!(socket.is_ipv4(), false);
301    /// assert_eq!(socket.is_ipv6(), true);
302    /// ```
303    #[must_use]
304    #[stable(feature = "sockaddr_checker", since = "1.16.0")]
305    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
306    #[inline]
307    pub const fn is_ipv6(&self) -> bool {
308        matches!(*self, SocketAddr::V6(_))
309    }
310}
311
312impl SocketAddrV4 {
313    /// Creates a new socket address from an [`IPv4` address] and a port number.
314    ///
315    /// [`IPv4` address]: Ipv4Addr
316    ///
317    /// # Examples
318    ///
319    /// ```
320    /// use std::net::{SocketAddrV4, Ipv4Addr};
321    ///
322    /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
323    /// ```
324    #[stable(feature = "rust1", since = "1.0.0")]
325    #[must_use]
326    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
327    #[inline]
328    pub const fn new(ip: Ipv4Addr, port: u16) -> SocketAddrV4 {
329        SocketAddrV4 { ip, port }
330    }
331
332    /// Returns the IP address associated with this socket address.
333    ///
334    /// # Examples
335    ///
336    /// ```
337    /// use std::net::{SocketAddrV4, Ipv4Addr};
338    ///
339    /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
340    /// assert_eq!(socket.ip(), &Ipv4Addr::new(127, 0, 0, 1));
341    /// ```
342    #[must_use]
343    #[stable(feature = "rust1", since = "1.0.0")]
344    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
345    #[inline]
346    pub const fn ip(&self) -> &Ipv4Addr {
347        &self.ip
348    }
349
350    /// Changes the IP address associated with this socket address.
351    ///
352    /// # Examples
353    ///
354    /// ```
355    /// use std::net::{SocketAddrV4, Ipv4Addr};
356    ///
357    /// let mut socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
358    /// socket.set_ip(Ipv4Addr::new(192, 168, 0, 1));
359    /// assert_eq!(socket.ip(), &Ipv4Addr::new(192, 168, 0, 1));
360    /// ```
361    #[inline]
362    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
363    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
364    pub const fn set_ip(&mut self, new_ip: Ipv4Addr) {
365        self.ip = new_ip;
366    }
367
368    /// Returns the port number associated with this socket address.
369    ///
370    /// # Examples
371    ///
372    /// ```
373    /// use std::net::{SocketAddrV4, Ipv4Addr};
374    ///
375    /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
376    /// assert_eq!(socket.port(), 8080);
377    /// ```
378    #[must_use]
379    #[stable(feature = "rust1", since = "1.0.0")]
380    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
381    #[inline]
382    pub const fn port(&self) -> u16 {
383        self.port
384    }
385
386    /// Changes the port number associated with this socket address.
387    ///
388    /// # Examples
389    ///
390    /// ```
391    /// use std::net::{SocketAddrV4, Ipv4Addr};
392    ///
393    /// let mut socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
394    /// socket.set_port(4242);
395    /// assert_eq!(socket.port(), 4242);
396    /// ```
397    #[inline]
398    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
399    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
400    pub const fn set_port(&mut self, new_port: u16) {
401        self.port = new_port;
402    }
403}
404
405impl SocketAddrV6 {
406    /// Creates a new socket address from an [`IPv6` address], a 16-bit port number,
407    /// and the `flowinfo` and `scope_id` fields.
408    ///
409    /// For more information on the meaning and layout of the `flowinfo` and `scope_id`
410    /// parameters, see [IETF RFC 2553, Section 3.3].
411    ///
412    /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
413    /// [`IPv6` address]: Ipv6Addr
414    ///
415    /// # Examples
416    ///
417    /// ```
418    /// use std::net::{SocketAddrV6, Ipv6Addr};
419    ///
420    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
421    /// ```
422    #[stable(feature = "rust1", since = "1.0.0")]
423    #[must_use]
424    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
425    #[inline]
426    pub const fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32) -> SocketAddrV6 {
427        SocketAddrV6 { ip, port, flowinfo, scope_id }
428    }
429
430    /// Returns the IP address associated with this socket address.
431    ///
432    /// # Examples
433    ///
434    /// ```
435    /// use std::net::{SocketAddrV6, Ipv6Addr};
436    ///
437    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
438    /// assert_eq!(socket.ip(), &Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1));
439    /// ```
440    #[must_use]
441    #[stable(feature = "rust1", since = "1.0.0")]
442    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
443    #[inline]
444    pub const fn ip(&self) -> &Ipv6Addr {
445        &self.ip
446    }
447
448    /// Changes the IP address associated with this socket address.
449    ///
450    /// # Examples
451    ///
452    /// ```
453    /// use std::net::{SocketAddrV6, Ipv6Addr};
454    ///
455    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
456    /// socket.set_ip(Ipv6Addr::new(76, 45, 0, 0, 0, 0, 0, 0));
457    /// assert_eq!(socket.ip(), &Ipv6Addr::new(76, 45, 0, 0, 0, 0, 0, 0));
458    /// ```
459    #[inline]
460    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
461    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
462    pub const fn set_ip(&mut self, new_ip: Ipv6Addr) {
463        self.ip = new_ip;
464    }
465
466    /// Returns the port number associated with this socket address.
467    ///
468    /// # Examples
469    ///
470    /// ```
471    /// use std::net::{SocketAddrV6, Ipv6Addr};
472    ///
473    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
474    /// assert_eq!(socket.port(), 8080);
475    /// ```
476    #[must_use]
477    #[stable(feature = "rust1", since = "1.0.0")]
478    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
479    #[inline]
480    pub const fn port(&self) -> u16 {
481        self.port
482    }
483
484    /// Changes the port number associated with this socket address.
485    ///
486    /// # Examples
487    ///
488    /// ```
489    /// use std::net::{SocketAddrV6, Ipv6Addr};
490    ///
491    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
492    /// socket.set_port(4242);
493    /// assert_eq!(socket.port(), 4242);
494    /// ```
495    #[inline]
496    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
497    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
498    pub const fn set_port(&mut self, new_port: u16) {
499        self.port = new_port;
500    }
501
502    /// Returns the flow information associated with this address.
503    ///
504    /// This information corresponds to the `sin6_flowinfo` field in C's `netinet/in.h`,
505    /// as specified in [IETF RFC 2553, Section 3.3].
506    /// It combines information about the flow label and the traffic class as specified
507    /// in [IETF RFC 2460], respectively [Section 6] and [Section 7].
508    ///
509    /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
510    /// [IETF RFC 2460]: https://tools.ietf.org/html/rfc2460
511    /// [Section 6]: https://tools.ietf.org/html/rfc2460#section-6
512    /// [Section 7]: https://tools.ietf.org/html/rfc2460#section-7
513    ///
514    /// # Examples
515    ///
516    /// ```
517    /// use std::net::{SocketAddrV6, Ipv6Addr};
518    ///
519    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 10, 0);
520    /// assert_eq!(socket.flowinfo(), 10);
521    /// ```
522    #[must_use]
523    #[stable(feature = "rust1", since = "1.0.0")]
524    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
525    #[inline]
526    pub const fn flowinfo(&self) -> u32 {
527        self.flowinfo
528    }
529
530    /// Changes the flow information associated with this socket address.
531    ///
532    /// See [`SocketAddrV6::flowinfo`]'s documentation for more details.
533    ///
534    /// # Examples
535    ///
536    /// ```
537    /// use std::net::{SocketAddrV6, Ipv6Addr};
538    ///
539    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 10, 0);
540    /// socket.set_flowinfo(56);
541    /// assert_eq!(socket.flowinfo(), 56);
542    /// ```
543    #[inline]
544    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
545    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
546    pub const fn set_flowinfo(&mut self, new_flowinfo: u32) {
547        self.flowinfo = new_flowinfo;
548    }
549
550    /// Returns the scope ID associated with this address.
551    ///
552    /// This information corresponds to the `sin6_scope_id` field in C's `netinet/in.h`,
553    /// as specified in [IETF RFC 2553, Section 3.3].
554    ///
555    /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
556    ///
557    /// # Examples
558    ///
559    /// ```
560    /// use std::net::{SocketAddrV6, Ipv6Addr};
561    ///
562    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 78);
563    /// assert_eq!(socket.scope_id(), 78);
564    /// ```
565    #[must_use]
566    #[stable(feature = "rust1", since = "1.0.0")]
567    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
568    #[inline]
569    pub const fn scope_id(&self) -> u32 {
570        self.scope_id
571    }
572
573    /// Changes the scope ID associated with this socket address.
574    ///
575    /// See [`SocketAddrV6::scope_id`]'s documentation for more details.
576    ///
577    /// # Examples
578    ///
579    /// ```
580    /// use std::net::{SocketAddrV6, Ipv6Addr};
581    ///
582    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 78);
583    /// socket.set_scope_id(42);
584    /// assert_eq!(socket.scope_id(), 42);
585    /// ```
586    #[inline]
587    #[stable(feature = "sockaddr_setters", since = "1.9.0")]
588    #[rustc_const_stable(feature = "const_sockaddr_setters", since = "1.87.0")]
589    pub const fn set_scope_id(&mut self, new_scope_id: u32) {
590        self.scope_id = new_scope_id;
591    }
592}
593
594#[stable(feature = "ip_from_ip", since = "1.16.0")]
595impl From<SocketAddrV4> for SocketAddr {
596    /// Converts a [`SocketAddrV4`] into a [`SocketAddr::V4`].
597    #[inline]
598    fn from(sock4: SocketAddrV4) -> SocketAddr {
599        SocketAddr::V4(sock4)
600    }
601}
602
603#[stable(feature = "ip_from_ip", since = "1.16.0")]
604impl From<SocketAddrV6> for SocketAddr {
605    /// Converts a [`SocketAddrV6`] into a [`SocketAddr::V6`].
606    #[inline]
607    fn from(sock6: SocketAddrV6) -> SocketAddr {
608        SocketAddr::V6(sock6)
609    }
610}
611
612#[stable(feature = "addr_from_into_ip", since = "1.17.0")]
613impl<I: Into<IpAddr>> From<(I, u16)> for SocketAddr {
614    /// Converts a tuple struct (Into<[`IpAddr`]>, `u16`) into a [`SocketAddr`].
615    ///
616    /// This conversion creates a [`SocketAddr::V4`] for an [`IpAddr::V4`]
617    /// and creates a [`SocketAddr::V6`] for an [`IpAddr::V6`].
618    ///
619    /// `u16` is treated as port of the newly created [`SocketAddr`].
620    fn from(pieces: (I, u16)) -> SocketAddr {
621        SocketAddr::new(pieces.0.into(), pieces.1)
622    }
623}
624
625#[stable(feature = "rust1", since = "1.0.0")]
626impl fmt::Display for SocketAddr {
627    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
628        match *self {
629            SocketAddr::V4(ref a) => a.fmt(f),
630            SocketAddr::V6(ref a) => a.fmt(f),
631        }
632    }
633}
634
635#[stable(feature = "rust1", since = "1.0.0")]
636impl fmt::Debug for SocketAddr {
637    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
638        fmt::Display::fmt(self, fmt)
639    }
640}
641
642#[stable(feature = "rust1", since = "1.0.0")]
643impl fmt::Display for SocketAddrV4 {
644    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
645        // If there are no alignment requirements, write the socket address directly to `f`.
646        // Otherwise, write it to a local buffer and then use `f.pad`.
647        if f.precision().is_none() && f.width().is_none() {
648            write!(f, "{}:{}", self.ip(), self.port())
649        } else {
650            const LONGEST_IPV4_SOCKET_ADDR: &str = "255.255.255.255:65535";
651
652            let mut buf = DisplayBuffer::<{ LONGEST_IPV4_SOCKET_ADDR.len() }>::new();
653            // Buffer is long enough for the longest possible IPv4 socket address, so this should never fail.
654            write!(buf, "{}:{}", self.ip(), self.port()).unwrap();
655
656            f.pad(buf.as_str())
657        }
658    }
659}
660
661#[stable(feature = "rust1", since = "1.0.0")]
662impl fmt::Debug for SocketAddrV4 {
663    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
664        fmt::Display::fmt(self, fmt)
665    }
666}
667
668#[stable(feature = "rust1", since = "1.0.0")]
669impl fmt::Display for SocketAddrV6 {
670    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
671        // If there are no alignment requirements, write the socket address directly to `f`.
672        // Otherwise, write it to a local buffer and then use `f.pad`.
673        if f.precision().is_none() && f.width().is_none() {
674            match self.scope_id() {
675                0 => write!(f, "[{}]:{}", self.ip(), self.port()),
676                scope_id => write!(f, "[{}%{}]:{}", self.ip(), scope_id, self.port()),
677            }
678        } else {
679            const LONGEST_IPV6_SOCKET_ADDR: &str =
680                "[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff%4294967295]:65535";
681
682            let mut buf = DisplayBuffer::<{ LONGEST_IPV6_SOCKET_ADDR.len() }>::new();
683            match self.scope_id() {
684                0 => write!(buf, "[{}]:{}", self.ip(), self.port()),
685                scope_id => write!(buf, "[{}%{}]:{}", self.ip(), scope_id, self.port()),
686            }
687            // Buffer is long enough for the longest possible IPv6 socket address, so this should never fail.
688            .unwrap();
689
690            f.pad(buf.as_str())
691        }
692    }
693}
694
695#[stable(feature = "rust1", since = "1.0.0")]
696impl fmt::Debug for SocketAddrV6 {
697    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
698        fmt::Display::fmt(self, fmt)
699    }
700}
core/net/socket_addr.rs

core/net/
socket_addr.rs
