core_net/
socket_addr.rs

1use core::cmp::Ordering;
2use core::fmt::{self, Write};
3use core::hash;
4use crate::{IpAddr, Ipv4Addr, Ipv6Addr};
5
6/// An internet socket address, either IPv4 or IPv6.
7///
8/// Internet socket addresses consist of an [IP address], a 16-bit port number, as well
9/// as possibly some version-dependent additional information. See [`SocketAddrV4`]'s and
10/// [`SocketAddrV6`]'s respective documentation for more details.
11///
12/// The size of a `SocketAddr` instance may vary depending on the target operating
13/// system.
14///
15/// [IP address]: IpAddr
16///
17/// # Examples
18///
19/// ```
20/// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
21///
22/// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
23///
24/// assert_eq!("127.0.0.1:8080".parse(), Ok(socket));
25/// assert_eq!(socket.port(), 8080);
26/// assert_eq!(socket.is_ipv4(), true);
27/// ```
28#[derive(Copy, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
29pub enum SocketAddr {
30    /// An IPv4 socket address.
31    V4(SocketAddrV4),
32    /// An IPv6 socket address.
33    V6(SocketAddrV6),
34}
35
36/// An IPv4 socket address.
37///
38/// IPv4 socket addresses consist of an [`IPv4` address] and a 16-bit port number, as
39/// stated in [IETF RFC 793].
40///
41/// See [`SocketAddr`] for a type encompassing both IPv4 and IPv6 socket addresses.
42///
43/// The size of a `SocketAddrV4` struct may vary depending on the target operating
44/// system. Do not assume that this type has the same memory layout as the underlying
45/// system representation.
46///
47/// [IETF RFC 793]: https://tools.ietf.org/html/rfc793
48/// [`IPv4` address]: Ipv4Addr
49///
50/// # Examples
51///
52/// ```
53/// use std::net::{Ipv4Addr, SocketAddrV4};
54///
55/// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
56///
57/// assert_eq!("127.0.0.1:8080".parse(), Ok(socket));
58/// assert_eq!(socket.ip(), &Ipv4Addr::new(127, 0, 0, 1));
59/// assert_eq!(socket.port(), 8080);
60/// ```
61#[derive(Copy, Clone, Eq, PartialEq)]
62pub struct SocketAddrV4 {
63    ip: Ipv4Addr,
64    port: u16,
65}
66
67/// An IPv6 socket address.
68///
69/// IPv6 socket addresses consist of an [`IPv6` address], a 16-bit port number, as well
70/// as fields containing the traffic class, the flow label, and a scope identifier
71/// (see [IETF RFC 2553, Section 3.3] for more details).
72///
73/// See [`SocketAddr`] for a type encompassing both IPv4 and IPv6 socket addresses.
74///
75/// The size of a `SocketAddrV6` struct may vary depending on the target operating
76/// system. Do not assume that this type has the same memory layout as the underlying
77/// system representation.
78///
79/// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
80/// [`IPv6` address]: Ipv6Addr
81///
82/// # Examples
83///
84/// ```
85/// use std::net::{Ipv6Addr, SocketAddrV6};
86///
87/// let socket = SocketAddrV6::new(Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
88///
89/// assert_eq!("[2001:db8::1]:8080".parse(), Ok(socket));
90/// assert_eq!(socket.ip(), &Ipv6Addr::new(0x2001, 0xdb8, 0, 0, 0, 0, 0, 1));
91/// assert_eq!(socket.port(), 8080);
92/// ```
93#[derive(Copy, Clone, Eq, PartialEq)]
94pub struct SocketAddrV6 {
95    ip: Ipv6Addr,
96    port: u16,
97    flowinfo: u32,
98    scope_id: u32,
99}
100
101impl SocketAddr {
102    /// Creates a new socket address from an [IP address] and a port number.
103    ///
104    /// [IP address]: IpAddr
105    ///
106    /// # Examples
107    ///
108    /// ```
109    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
110    ///
111    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
112    /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)));
113    /// assert_eq!(socket.port(), 8080);
114    /// ```
115    #[must_use]
116    pub const fn new(ip: IpAddr, port: u16) -> SocketAddr {
117        match ip {
118            IpAddr::V4(a) => SocketAddr::V4(SocketAddrV4::new(a, port)),
119            IpAddr::V6(a) => SocketAddr::V6(SocketAddrV6::new(a, port, 0, 0)),
120        }
121    }
122
123    /// Returns the IP address associated with this socket address.
124    ///
125    /// # Examples
126    ///
127    /// ```
128    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
129    ///
130    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
131    /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)));
132    /// ```
133    #[must_use]
134    pub const fn ip(&self) -> IpAddr {
135        match *self {
136            SocketAddr::V4(ref a) => IpAddr::V4(*a.ip()),
137            SocketAddr::V6(ref a) => IpAddr::V6(*a.ip()),
138        }
139    }
140
141    /// Changes the IP address associated with this socket address.
142    ///
143    /// # Examples
144    ///
145    /// ```
146    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
147    ///
148    /// let mut socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
149    /// socket.set_ip(IpAddr::V4(Ipv4Addr::new(10, 10, 0, 1)));
150    /// assert_eq!(socket.ip(), IpAddr::V4(Ipv4Addr::new(10, 10, 0, 1)));
151    /// ```
152    pub fn set_ip(&mut self, new_ip: IpAddr) {
153        // `match (*self, new_ip)` would have us mutate a copy of self only to throw it away.
154        match (self, new_ip) {
155            (&mut SocketAddr::V4(ref mut a), IpAddr::V4(new_ip)) => a.set_ip(new_ip),
156            (&mut SocketAddr::V6(ref mut a), IpAddr::V6(new_ip)) => a.set_ip(new_ip),
157            (self_, new_ip) => *self_ = Self::new(new_ip, self_.port()),
158        }
159    }
160
161    /// Returns the port number associated with this socket address.
162    ///
163    /// # Examples
164    ///
165    /// ```
166    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
167    ///
168    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
169    /// assert_eq!(socket.port(), 8080);
170    /// ```
171    #[must_use]
172    pub const fn port(&self) -> u16 {
173        match *self {
174            SocketAddr::V4(ref a) => a.port(),
175            SocketAddr::V6(ref a) => a.port(),
176        }
177    }
178
179    /// Changes the port number associated with this socket address.
180    ///
181    /// # Examples
182    ///
183    /// ```
184    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
185    ///
186    /// let mut socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
187    /// socket.set_port(1025);
188    /// assert_eq!(socket.port(), 1025);
189    /// ```
190    pub fn set_port(&mut self, new_port: u16) {
191        match *self {
192            SocketAddr::V4(ref mut a) => a.set_port(new_port),
193            SocketAddr::V6(ref mut a) => a.set_port(new_port),
194        }
195    }
196
197    /// Returns [`true`] if the [IP address] in this `SocketAddr` is an
198    /// [`IPv4` address], and [`false`] otherwise.
199    ///
200    /// [IP address]: IpAddr
201    /// [`IPv4` address]: IpAddr::V4
202    ///
203    /// # Examples
204    ///
205    /// ```
206    /// use std::net::{IpAddr, Ipv4Addr, SocketAddr};
207    ///
208    /// let socket = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8080);
209    /// assert_eq!(socket.is_ipv4(), true);
210    /// assert_eq!(socket.is_ipv6(), false);
211    /// ```
212    #[must_use]
213    pub const fn is_ipv4(&self) -> bool {
214        matches!(*self, SocketAddr::V4(_))
215    }
216
217    /// Returns [`true`] if the [IP address] in this `SocketAddr` is an
218    /// [`IPv6` address], and [`false`] otherwise.
219    ///
220    /// [IP address]: IpAddr
221    /// [`IPv6` address]: IpAddr::V6
222    ///
223    /// # Examples
224    ///
225    /// ```
226    /// use std::net::{IpAddr, Ipv6Addr, SocketAddr};
227    ///
228    /// let socket = SocketAddr::new(IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 65535, 0, 1)), 8080);
229    /// assert_eq!(socket.is_ipv4(), false);
230    /// assert_eq!(socket.is_ipv6(), true);
231    /// ```
232    #[must_use]
233    pub const fn is_ipv6(&self) -> bool {
234        matches!(*self, SocketAddr::V6(_))
235    }
236}
237
238impl SocketAddrV4 {
239    /// Creates a new socket address from an [`IPv4` address] and a port number.
240    ///
241    /// [`IPv4` address]: Ipv4Addr
242    ///
243    /// # Examples
244    ///
245    /// ```
246    /// use std::net::{SocketAddrV4, Ipv4Addr};
247    ///
248    /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
249    /// ```
250    #[must_use]
251    pub const fn new(ip: Ipv4Addr, port: u16) -> SocketAddrV4 {
252        SocketAddrV4 { ip, port }
253    }
254
255    /// Returns the IP address associated with this socket address.
256    ///
257    /// # Examples
258    ///
259    /// ```
260    /// use std::net::{SocketAddrV4, Ipv4Addr};
261    ///
262    /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
263    /// assert_eq!(socket.ip(), &Ipv4Addr::new(127, 0, 0, 1));
264    /// ```
265    #[must_use]
266    pub const fn ip(&self) -> &Ipv4Addr {
267        &self.ip
268    }
269
270    /// Changes the IP address associated with this socket address.
271    ///
272    /// # Examples
273    ///
274    /// ```
275    /// use std::net::{SocketAddrV4, Ipv4Addr};
276    ///
277    /// let mut socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
278    /// socket.set_ip(Ipv4Addr::new(192, 168, 0, 1));
279    /// assert_eq!(socket.ip(), &Ipv4Addr::new(192, 168, 0, 1));
280    /// ```
281    pub fn set_ip(&mut self, new_ip: Ipv4Addr) {
282        self.ip = new_ip;
283    }
284
285    /// Returns the port number associated with this socket address.
286    ///
287    /// # Examples
288    ///
289    /// ```
290    /// use std::net::{SocketAddrV4, Ipv4Addr};
291    ///
292    /// let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
293    /// assert_eq!(socket.port(), 8080);
294    /// ```
295    #[must_use]
296    pub const fn port(&self) -> u16 {
297        self.port
298    }
299
300    /// Changes the port number associated with this socket address.
301    ///
302    /// # Examples
303    ///
304    /// ```
305    /// use std::net::{SocketAddrV4, Ipv4Addr};
306    ///
307    /// let mut socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
308    /// socket.set_port(4242);
309    /// assert_eq!(socket.port(), 4242);
310    /// ```
311    pub fn set_port(&mut self, new_port: u16) {
312        self.port = new_port;
313    }
314}
315
316impl SocketAddrV6 {
317    /// Creates a new socket address from an [`IPv6` address], a 16-bit port number,
318    /// and the `flowinfo` and `scope_id` fields.
319    ///
320    /// For more information on the meaning and layout of the `flowinfo` and `scope_id`
321    /// parameters, see [IETF RFC 2553, Section 3.3].
322    ///
323    /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
324    /// [`IPv6` address]: Ipv6Addr
325    ///
326    /// # Examples
327    ///
328    /// ```
329    /// use std::net::{SocketAddrV6, Ipv6Addr};
330    ///
331    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
332    /// ```
333    #[must_use]
334    pub const fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32) -> SocketAddrV6 {
335        SocketAddrV6 { ip, port, flowinfo, scope_id }
336    }
337
338    /// Returns the IP address associated with this socket address.
339    ///
340    /// # Examples
341    ///
342    /// ```
343    /// use std::net::{SocketAddrV6, Ipv6Addr};
344    ///
345    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
346    /// assert_eq!(socket.ip(), &Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1));
347    /// ```
348    #[must_use]
349    pub const fn ip(&self) -> &Ipv6Addr {
350        &self.ip
351    }
352
353    /// Changes the IP address associated with this socket address.
354    ///
355    /// # Examples
356    ///
357    /// ```
358    /// use std::net::{SocketAddrV6, Ipv6Addr};
359    ///
360    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
361    /// socket.set_ip(Ipv6Addr::new(76, 45, 0, 0, 0, 0, 0, 0));
362    /// assert_eq!(socket.ip(), &Ipv6Addr::new(76, 45, 0, 0, 0, 0, 0, 0));
363    /// ```
364    pub fn set_ip(&mut self, new_ip: Ipv6Addr) {
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::{SocketAddrV6, Ipv6Addr};
374    ///
375    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
376    /// assert_eq!(socket.port(), 8080);
377    /// ```
378    #[must_use]
379    pub const fn port(&self) -> u16 {
380        self.port
381    }
382
383    /// Changes the port number associated with this socket address.
384    ///
385    /// # Examples
386    ///
387    /// ```
388    /// use std::net::{SocketAddrV6, Ipv6Addr};
389    ///
390    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 0);
391    /// socket.set_port(4242);
392    /// assert_eq!(socket.port(), 4242);
393    /// ```
394    pub fn set_port(&mut self, new_port: u16) {
395        self.port = new_port;
396    }
397
398    /// Returns the flow information associated with this address.
399    ///
400    /// This information corresponds to the `sin6_flowinfo` field in C's `netinet/in.h`,
401    /// as specified in [IETF RFC 2553, Section 3.3].
402    /// It combines information about the flow label and the traffic class as specified
403    /// in [IETF RFC 2460], respectively [Section 6] and [Section 7].
404    ///
405    /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
406    /// [IETF RFC 2460]: https://tools.ietf.org/html/rfc2460
407    /// [Section 6]: https://tools.ietf.org/html/rfc2460#section-6
408    /// [Section 7]: https://tools.ietf.org/html/rfc2460#section-7
409    ///
410    /// # Examples
411    ///
412    /// ```
413    /// use std::net::{SocketAddrV6, Ipv6Addr};
414    ///
415    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 10, 0);
416    /// assert_eq!(socket.flowinfo(), 10);
417    /// ```
418    #[must_use]
419    pub const fn flowinfo(&self) -> u32 {
420        self.flowinfo
421    }
422
423    /// Changes the flow information associated with this socket address.
424    ///
425    /// See [`SocketAddrV6::flowinfo`]'s documentation for more details.
426    ///
427    /// # Examples
428    ///
429    /// ```
430    /// use std::net::{SocketAddrV6, Ipv6Addr};
431    ///
432    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 10, 0);
433    /// socket.set_flowinfo(56);
434    /// assert_eq!(socket.flowinfo(), 56);
435    /// ```
436    pub fn set_flowinfo(&mut self, new_flowinfo: u32) {
437        self.flowinfo = new_flowinfo;
438    }
439
440    /// Returns the scope ID associated with this address.
441    ///
442    /// This information corresponds to the `sin6_scope_id` field in C's `netinet/in.h`,
443    /// as specified in [IETF RFC 2553, Section 3.3].
444    ///
445    /// [IETF RFC 2553, Section 3.3]: https://tools.ietf.org/html/rfc2553#section-3.3
446    ///
447    /// # Examples
448    ///
449    /// ```
450    /// use std::net::{SocketAddrV6, Ipv6Addr};
451    ///
452    /// let socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 78);
453    /// assert_eq!(socket.scope_id(), 78);
454    /// ```
455    #[must_use]
456    pub const fn scope_id(&self) -> u32 {
457        self.scope_id
458    }
459
460    /// Changes the scope ID associated with this socket address.
461    ///
462    /// See [`SocketAddrV6::scope_id`]'s documentation for more details.
463    ///
464    /// # Examples
465    ///
466    /// ```
467    /// use std::net::{SocketAddrV6, Ipv6Addr};
468    ///
469    /// let mut socket = SocketAddrV6::new(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1), 8080, 0, 78);
470    /// socket.set_scope_id(42);
471    /// assert_eq!(socket.scope_id(), 42);
472    /// ```
473    pub fn set_scope_id(&mut self, new_scope_id: u32) {
474        self.scope_id = new_scope_id;
475    }
476}
477
478impl From<SocketAddrV4> for SocketAddr {
479    /// Converts a [`SocketAddrV4`] into a [`SocketAddr::V4`].
480    fn from(sock4: SocketAddrV4) -> SocketAddr {
481        SocketAddr::V4(sock4)
482    }
483}
484
485impl From<SocketAddrV6> for SocketAddr {
486    /// Converts a [`SocketAddrV6`] into a [`SocketAddr::V6`].
487    fn from(sock6: SocketAddrV6) -> SocketAddr {
488        SocketAddr::V6(sock6)
489    }
490}
491
492impl<I: Into<IpAddr>> From<(I, u16)> for SocketAddr {
493    /// Converts a tuple struct (Into<[`IpAddr`]>, `u16`) into a [`SocketAddr`].
494    ///
495    /// This conversion creates a [`SocketAddr::V4`] for an [`IpAddr::V4`]
496    /// and creates a [`SocketAddr::V6`] for an [`IpAddr::V6`].
497    ///
498    /// `u16` is treated as port of the newly created [`SocketAddr`].
499    fn from(pieces: (I, u16)) -> SocketAddr {
500        SocketAddr::new(pieces.0.into(), pieces.1)
501    }
502}
503
504impl fmt::Display for SocketAddr {
505    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
506        match *self {
507            SocketAddr::V4(ref a) => a.fmt(f),
508            SocketAddr::V6(ref a) => a.fmt(f),
509        }
510    }
511}
512
513impl fmt::Debug for SocketAddr {
514    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
515        fmt::Display::fmt(self, fmt)
516    }
517}
518
519impl fmt::Display for SocketAddrV4 {
520    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
521        // If there are no alignment requirements, write the socket address directly to `f`.
522        // Otherwise, write it to a local buffer and then use `f.pad`.
523        if f.precision().is_none() && f.width().is_none() {
524            write!(f, "{}:{}", self.ip(), self.port())
525        } else {
526            const LONGEST_IPV4_SOCKET_ADDR: &str = "255.255.255.255:65536";
527
528            let mut buf = String::with_capacity(LONGEST_IPV4_SOCKET_ADDR.len());
529            // Buffer is long enough for the longest possible IPv4 socket address, so this should never fail.
530            write!(buf, "{}:{}", self.ip(), self.port()).unwrap();
531
532            f.pad(buf.as_str())
533        }
534    }
535}
536
537impl fmt::Debug for SocketAddrV4 {
538    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
539        fmt::Display::fmt(self, fmt)
540    }
541}
542
543impl fmt::Display for SocketAddrV6 {
544    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
545        // If there are no alignment requirements, write the socket address directly to `f`.
546        // Otherwise, write it to a local buffer and then use `f.pad`.
547        if f.precision().is_none() && f.width().is_none() {
548            match self.scope_id() {
549                0 => write!(f, "[{}]:{}", self.ip(), self.port()),
550                scope_id => write!(f, "[{}%{}]:{}", self.ip(), scope_id, self.port()),
551            }
552        } else {
553            const LONGEST_IPV6_SOCKET_ADDR: &str =
554                "[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff%4294967296]:65536";
555
556            let mut buf = String::with_capacity(LONGEST_IPV6_SOCKET_ADDR.len());
557            match self.scope_id() {
558                0 => write!(buf, "[{}]:{}", self.ip(), self.port()),
559                scope_id => write!(buf, "[{}%{}]:{}", self.ip(), scope_id, self.port()),
560            }
561            // Buffer is long enough for the longest possible IPv6 socket address, so this should never fail.
562            .unwrap();
563
564            f.pad(buf.as_str())
565        }
566    }
567}
568
569impl fmt::Debug for SocketAddrV6 {
570    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
571        fmt::Display::fmt(self, fmt)
572    }
573}
574
575impl PartialOrd for SocketAddrV4 {
576    fn partial_cmp(&self, other: &SocketAddrV4) -> Option<Ordering> {
577        Some(self.cmp(other))
578    }
579}
580
581impl PartialOrd for SocketAddrV6 {
582    fn partial_cmp(&self, other: &SocketAddrV6) -> Option<Ordering> {
583        Some(self.cmp(other))
584    }
585}
586
587impl Ord for SocketAddrV4 {
588    fn cmp(&self, other: &SocketAddrV4) -> Ordering {
589        self.ip().cmp(other.ip()).then(self.port().cmp(&other.port()))
590    }
591}
592
593impl Ord for SocketAddrV6 {
594    fn cmp(&self, other: &SocketAddrV6) -> Ordering {
595        self.ip().cmp(other.ip()).then(self.port().cmp(&other.port()))
596    }
597}
598
599impl hash::Hash for SocketAddrV4 {
600    fn hash<H: hash::Hasher>(&self, s: &mut H) {
601        (self.port, self.ip).hash(s)
602    }
603}
604
605impl hash::Hash for SocketAddrV6 {
606    fn hash<H: hash::Hasher>(&self, s: &mut H) {
607        (self.port, &self.ip, self.flowinfo, self.scope_id).hash(s)
608    }
609}