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rust/src/libstd/io/net/ip.rs

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// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Internet Protocol (IP) addresses.
//!
//! This module contains functions useful for parsing, formatting, and
//! manipulating IP addresses.
#![allow(missing_docs)]
pub use self::IpAddr::*;
use fmt;
use io::{mod, IoResult, IoError};
use io::net;
use iter::{Iterator, IteratorExt};
use ops::FnOnce;
use option::Option;
use option::Option::{None, Some};
use result::Result::{Ok, Err};
use slice::SliceExt;
use str::{FromStr, StrExt};
use vec::Vec;
pub type Port = u16;
#[deriving(Copy, PartialEq, Eq, Clone, Hash)]
pub enum IpAddr {
Ipv4Addr(u8, u8, u8, u8),
Ipv6Addr(u16, u16, u16, u16, u16, u16, u16, u16)
}
impl fmt::Show for IpAddr {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
match *self {
Ipv4Addr(a, b, c, d) =>
write!(fmt, "{}.{}.{}.{}", a, b, c, d),
// Ipv4 Compatible address
Ipv6Addr(0, 0, 0, 0, 0, 0, g, h) => {
write!(fmt, "::{}.{}.{}.{}", (g >> 8) as u8, g as u8,
(h >> 8) as u8, h as u8)
}
// Ipv4-Mapped address
Ipv6Addr(0, 0, 0, 0, 0, 0xFFFF, g, h) => {
write!(fmt, "::FFFF:{}.{}.{}.{}", (g >> 8) as u8, g as u8,
(h >> 8) as u8, h as u8)
}
Ipv6Addr(a, b, c, d, e, f, g, h) =>
write!(fmt, "{:x}:{:x}:{:x}:{:x}:{:x}:{:x}:{:x}:{:x}",
a, b, c, d, e, f, g, h)
}
}
}
#[deriving(Copy, PartialEq, Eq, Clone, Hash)]
pub struct SocketAddr {
pub ip: IpAddr,
pub port: Port,
}
impl fmt::Show for SocketAddr {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self.ip {
Ipv4Addr(..) => write!(f, "{}:{}", self.ip, self.port),
Ipv6Addr(..) => write!(f, "[{}]:{}", self.ip, self.port),
}
}
}
struct Parser<'a> {
// parsing as ASCII, so can use byte array
s: &'a [u8],
pos: uint,
}
impl<'a> Parser<'a> {
fn new(s: &'a str) -> Parser<'a> {
Parser {
s: s.as_bytes(),
pos: 0,
}
}
fn is_eof(&self) -> bool {
self.pos == self.s.len()
}
// Commit only if parser returns Some
fn read_atomically<T, F>(&mut self, cb: F) -> Option<T> where
F: FnOnce(&mut Parser) -> Option<T>,
{
let pos = self.pos;
let r = cb(self);
if r.is_none() {
self.pos = pos;
}
r
}
// Commit only if parser read till EOF
fn read_till_eof<T, F>(&mut self, cb: F) -> Option<T> where
F: FnOnce(&mut Parser) -> Option<T>,
{
self.read_atomically(move |p| {
match cb(p) {
Some(x) => if p.is_eof() {Some(x)} else {None},
None => None,
}
})
}
// Return result of first successful parser
fn read_or<T>(&mut self, parsers: &mut [|&mut Parser| -> Option<T>])
-> Option<T> {
for pf in parsers.iter_mut() {
match self.read_atomically(|p: &mut Parser| (*pf)(p)) {
Some(r) => return Some(r),
None => {}
}
}
None
}
// Apply 3 parsers sequentially
fn read_seq_3<A, B, C, PA, PB, PC>(&mut self,
pa: PA,
pb: PB,
pc: PC)
-> Option<(A, B, C)> where
PA: FnOnce(&mut Parser) -> Option<A>,
PB: FnOnce(&mut Parser) -> Option<B>,
PC: FnOnce(&mut Parser) -> Option<C>,
{
self.read_atomically(move |p| {
let a = pa(p);
let b = if a.is_some() { pb(p) } else { None };
let c = if b.is_some() { pc(p) } else { None };
match (a, b, c) {
(Some(a), Some(b), Some(c)) => Some((a, b, c)),
_ => None
}
})
}
// Read next char
fn read_char(&mut self) -> Option<char> {
if self.is_eof() {
None
} else {
let r = self.s[self.pos] as char;
self.pos += 1;
Some(r)
}
}
// Return char and advance iff next char is equal to requested
fn read_given_char(&mut self, c: char) -> Option<char> {
self.read_atomically(|p| {
match p.read_char() {
Some(next) if next == c => Some(next),
_ => None,
}
})
}
// Read digit
fn read_digit(&mut self, radix: u8) -> Option<u8> {
fn parse_digit(c: char, radix: u8) -> Option<u8> {
let c = c as u8;
// assuming radix is either 10 or 16
if c >= b'0' && c <= b'9' {
Some(c - b'0')
} else if radix > 10 && c >= b'a' && c < b'a' + (radix - 10) {
Some(c - b'a' + 10)
} else if radix > 10 && c >= b'A' && c < b'A' + (radix - 10) {
Some(c - b'A' + 10)
} else {
None
}
}
self.read_atomically(|p| {
p.read_char().and_then(|c| parse_digit(c, radix))
})
}
fn read_number_impl(&mut self, radix: u8, max_digits: u32, upto: u32) -> Option<u32> {
let mut r = 0u32;
let mut digit_count = 0;
loop {
match self.read_digit(radix) {
Some(d) => {
r = r * (radix as u32) + (d as u32);
digit_count += 1;
if digit_count > max_digits || r >= upto {
return None
}
}
None => {
if digit_count == 0 {
return None
} else {
return Some(r)
}
}
};
}
}
// Read number, failing if max_digits of number value exceeded
fn read_number(&mut self, radix: u8, max_digits: u32, upto: u32) -> Option<u32> {
self.read_atomically(|p| p.read_number_impl(radix, max_digits, upto))
}
fn read_ipv4_addr_impl(&mut self) -> Option<IpAddr> {
let mut bs = [0u8; 4];
let mut i = 0;
while i < 4 {
if i != 0 && self.read_given_char('.').is_none() {
return None;
}
let octet = self.read_number(10, 3, 0x100).map(|n| n as u8);
match octet {
Some(d) => bs[i] = d,
None => return None,
};
i += 1;
}
Some(Ipv4Addr(bs[0], bs[1], bs[2], bs[3]))
}
// Read IPv4 address
fn read_ipv4_addr(&mut self) -> Option<IpAddr> {
self.read_atomically(|p| p.read_ipv4_addr_impl())
}
fn read_ipv6_addr_impl(&mut self) -> Option<IpAddr> {
fn ipv6_addr_from_head_tail(head: &[u16], tail: &[u16]) -> IpAddr {
assert!(head.len() + tail.len() <= 8);
let mut gs = [0u16; 8];
gs.clone_from_slice(head);
gs.slice_mut(8 - tail.len(), 8).clone_from_slice(tail);
Ipv6Addr(gs[0], gs[1], gs[2], gs[3], gs[4], gs[5], gs[6], gs[7])
}
fn read_groups(p: &mut Parser, groups: &mut [u16; 8], limit: uint) -> (uint, bool) {
let mut i = 0;
while i < limit {
if i < limit - 1 {
let ipv4 = p.read_atomically(|p| {
if i == 0 || p.read_given_char(':').is_some() {
p.read_ipv4_addr()
} else {
None
}
});
match ipv4 {
Some(Ipv4Addr(a, b, c, d)) => {
groups[i + 0] = (a as u16 << 8) | (b as u16);
groups[i + 1] = (c as u16 << 8) | (d as u16);
return (i + 2, true);
}
_ => {}
}
}
let group = p.read_atomically(|p| {
if i == 0 || p.read_given_char(':').is_some() {
p.read_number(16, 4, 0x10000).map(|n| n as u16)
} else {
None
}
});
match group {
Some(g) => groups[i] = g,
None => return (i, false)
}
i += 1;
}
(i, false)
}
let mut head = [0u16; 8];
let (head_size, head_ipv4) = read_groups(self, &mut head, 8);
if head_size == 8 {
return Some(Ipv6Addr(
head[0], head[1], head[2], head[3],
head[4], head[5], head[6], head[7]))
}
// IPv4 part is not allowed before `::`
if head_ipv4 {
return None
}
// read `::` if previous code parsed less than 8 groups
if !self.read_given_char(':').is_some() || !self.read_given_char(':').is_some() {
return None;
}
let mut tail = [0u16; 8];
let (tail_size, _) = read_groups(self, &mut tail, 8 - head_size);
Some(ipv6_addr_from_head_tail(head[..head_size], tail[..tail_size]))
}
fn read_ipv6_addr(&mut self) -> Option<IpAddr> {
self.read_atomically(|p| p.read_ipv6_addr_impl())
}
fn read_ip_addr(&mut self) -> Option<IpAddr> {
let ipv4_addr = |p: &mut Parser| p.read_ipv4_addr();
let ipv6_addr = |p: &mut Parser| p.read_ipv6_addr();
self.read_or(&mut [ipv4_addr, ipv6_addr])
}
fn read_socket_addr(&mut self) -> Option<SocketAddr> {
let ip_addr = |&: p: &mut Parser| {
let ipv4_p = |p: &mut Parser| p.read_ip_addr();
let ipv6_p = |p: &mut Parser| {
let open_br = |&: p: &mut Parser| p.read_given_char('[');
let ip_addr = |&: p: &mut Parser| p.read_ipv6_addr();
let clos_br = |&: p: &mut Parser| p.read_given_char(']');
p.read_seq_3::<char, IpAddr, char, _, _, _>(open_br, ip_addr, clos_br)
.map(|t| match t { (_, ip, _) => ip })
};
p.read_or(&mut [ipv4_p, ipv6_p])
};
let colon = |&: p: &mut Parser| p.read_given_char(':');
let port = |&: p: &mut Parser| p.read_number(10, 5, 0x10000).map(|n| n as u16);
// host, colon, port
self.read_seq_3::<IpAddr, char, u16, _, _, _>(ip_addr, colon, port)
.map(|t| match t { (ip, _, port) => SocketAddr { ip: ip, port: port } })
}
}
impl FromStr for IpAddr {
fn from_str(s: &str) -> Option<IpAddr> {
Parser::new(s).read_till_eof(|p| p.read_ip_addr())
}
}
impl FromStr for SocketAddr {
fn from_str(s: &str) -> Option<SocketAddr> {
Parser::new(s).read_till_eof(|p| p.read_socket_addr())
}
}
/// A trait for objects which can be converted or resolved to one or more `SocketAddr` values.
///
/// Implementing types minimally have to implement either `to_socket_addr` or `to_socket_addr_all`
/// method, and its trivial counterpart will be available automatically.
///
/// This trait is used for generic address resolution when constructing network objects.
/// By default it is implemented for the following types:
///
/// * `SocketAddr` - `to_socket_addr` is identity function.
///
/// * `(IpAddr, u16)` - `to_socket_addr` constructs `SocketAddr` trivially.
///
/// * `(&str, u16)` - the string should be either a string representation of an IP address
/// expected by `FromStr` implementation for `IpAddr` or a host name.
///
/// For the former, `to_socket_addr_all` returns a vector with a single element corresponding
/// to that IP address joined with the given port.
///
/// For the latter, it tries to resolve the host name and returns a vector of all IP addresses
/// for the host name, each joined with the given port.
///
/// * `&str` - the string should be either a string representation of a `SocketAddr` as
/// expected by its `FromStr` implementation or a string like `<host_name>:<port>` pair
/// where `<port>` is a `u16` value.
///
/// For the former, `to_socket_addr_all` returns a vector with a single element corresponding
/// to that socket address.
///
/// For the latter, it tries to resolve the host name and returns a vector of all IP addresses
/// for the host name, each joined with the port.
///
///
/// This trait allows constructing network objects like `TcpStream` or `UdpSocket` easily with
/// values of various types for the bind/connection address. It is needed because sometimes
/// one type is more appropriate than the other: for simple uses a string like `"localhost:12345"`
/// is much nicer than manual construction of the corresponding `SocketAddr`, but sometimes
/// `SocketAddr` value is *the* main source of the address, and converting it to some other type
/// (e.g. a string) just for it to be converted back to `SocketAddr` in constructor methods
/// is pointless.
///
/// Some examples:
///
/// ```rust,no_run
/// # #![allow(unused_must_use)]
///
/// use std::io::{TcpStream, TcpListener};
/// use std::io::net::udp::UdpSocket;
/// use std::io::net::ip::{Ipv4Addr, SocketAddr};
///
/// fn main() {
/// // The following lines are equivalent modulo possible "localhost" name resolution
/// // differences
/// let tcp_s = TcpStream::connect(SocketAddr { ip: Ipv4Addr(127, 0, 0, 1), port: 12345 });
/// let tcp_s = TcpStream::connect((Ipv4Addr(127, 0, 0, 1), 12345u16));
/// let tcp_s = TcpStream::connect(("127.0.0.1", 12345u16));
/// let tcp_s = TcpStream::connect(("localhost", 12345u16));
/// let tcp_s = TcpStream::connect("127.0.0.1:12345");
/// let tcp_s = TcpStream::connect("localhost:12345");
///
/// // TcpListener::bind(), UdpSocket::bind() and UdpSocket::send_to() behave similarly
/// let tcp_l = TcpListener::bind("localhost:12345");
///
/// let mut udp_s = UdpSocket::bind(("127.0.0.1", 23451u16)).unwrap();
/// udp_s.send_to([7u8, 7u8, 7u8].as_slice(), (Ipv4Addr(127, 0, 0, 1), 23451u16));
/// }
/// ```
pub trait ToSocketAddr {
/// Converts this object to single socket address value.
///
/// If more than one value is available, this method returns the first one. If no
/// values are available, this method returns an `IoError`.
///
/// By default this method delegates to `to_socket_addr_all` method, taking the first
/// item from its result.
fn to_socket_addr(&self) -> IoResult<SocketAddr> {
self.to_socket_addr_all()
.and_then(|v| v.into_iter().next().ok_or_else(|| IoError {
kind: io::InvalidInput,
desc: "no address available",
detail: None
}))
}
/// Converts this object to all available socket address values.
///
/// Some values like host name string naturally correspond to multiple IP addresses.
/// This method tries to return all available addresses corresponding to this object.
///
/// By default this method delegates to `to_socket_addr` method, creating a singleton
/// vector from its result.
#[inline]
fn to_socket_addr_all(&self) -> IoResult<Vec<SocketAddr>> {
self.to_socket_addr().map(|a| vec![a])
}
}
impl ToSocketAddr for SocketAddr {
#[inline]
fn to_socket_addr(&self) -> IoResult<SocketAddr> { Ok(*self) }
}
impl ToSocketAddr for (IpAddr, u16) {
#[inline]
fn to_socket_addr(&self) -> IoResult<SocketAddr> {
let (ip, port) = *self;
Ok(SocketAddr { ip: ip, port: port })
}
}
fn resolve_socket_addr(s: &str, p: u16) -> IoResult<Vec<SocketAddr>> {
net::get_host_addresses(s)
.map(|v| v.into_iter().map(|a| SocketAddr { ip: a, port: p }).collect())
}
fn parse_and_resolve_socket_addr(s: &str) -> IoResult<Vec<SocketAddr>> {
macro_rules! try_opt {
($e:expr, $msg:expr) => (
match $e {
Some(r) => r,
None => return Err(IoError {
kind: io::InvalidInput,
desc: $msg,
detail: None
})
}
)
}
// split the string by ':' and convert the second part to u16
let mut parts_iter = s.rsplitn(2, ':');
let port_str = try_opt!(parts_iter.next(), "invalid socket address");
let host = try_opt!(parts_iter.next(), "invalid socket address");
let port: u16 = try_opt!(FromStr::from_str(port_str), "invalid port value");
resolve_socket_addr(host, port)
}
impl<'a> ToSocketAddr for (&'a str, u16) {
fn to_socket_addr_all(&self) -> IoResult<Vec<SocketAddr>> {
let (host, port) = *self;
// try to parse the host as a regular IpAddr first
match FromStr::from_str(host) {
Some(addr) => return Ok(vec![SocketAddr {
ip: addr,
port: port
}]),
None => {}
}
resolve_socket_addr(host, port)
}
}
// accepts strings like 'localhost:12345'
impl<'a> ToSocketAddr for &'a str {
fn to_socket_addr(&self) -> IoResult<SocketAddr> {
// try to parse as a regular SocketAddr first
match FromStr::from_str(*self) {
Some(addr) => return Ok(addr),
None => {}
}
parse_and_resolve_socket_addr(*self)
.and_then(|v| v.into_iter().next()
.ok_or_else(|| IoError {
kind: io::InvalidInput,
desc: "no address available",
detail: None
})
)
}
fn to_socket_addr_all(&self) -> IoResult<Vec<SocketAddr>> {
// try to parse as a regular SocketAddr first
match FromStr::from_str(*self) {
Some(addr) => return Ok(vec![addr]),
None => {}
}
parse_and_resolve_socket_addr(*self)
}
}
#[cfg(test)]
mod test {
use prelude::*;
use super::*;
use str::FromStr;
#[test]
fn test_from_str_ipv4() {
assert_eq!(Some(Ipv4Addr(127, 0, 0, 1)), FromStr::from_str("127.0.0.1"));
assert_eq!(Some(Ipv4Addr(255, 255, 255, 255)), FromStr::from_str("255.255.255.255"));
assert_eq!(Some(Ipv4Addr(0, 0, 0, 0)), FromStr::from_str("0.0.0.0"));
// out of range
let none: Option<IpAddr> = FromStr::from_str("256.0.0.1");
assert_eq!(None, none);
// too short
let none: Option<IpAddr> = FromStr::from_str("255.0.0");
assert_eq!(None, none);
// too long
let none: Option<IpAddr> = FromStr::from_str("255.0.0.1.2");
assert_eq!(None, none);
// no number between dots
let none: Option<IpAddr> = FromStr::from_str("255.0..1");
assert_eq!(None, none);
}
#[test]
fn test_from_str_ipv6() {
assert_eq!(Some(Ipv6Addr(0, 0, 0, 0, 0, 0, 0, 0)), FromStr::from_str("0:0:0:0:0:0:0:0"));
assert_eq!(Some(Ipv6Addr(0, 0, 0, 0, 0, 0, 0, 1)), FromStr::from_str("0:0:0:0:0:0:0:1"));
assert_eq!(Some(Ipv6Addr(0, 0, 0, 0, 0, 0, 0, 1)), FromStr::from_str("::1"));
assert_eq!(Some(Ipv6Addr(0, 0, 0, 0, 0, 0, 0, 0)), FromStr::from_str("::"));
assert_eq!(Some(Ipv6Addr(0x2a02, 0x6b8, 0, 0, 0, 0, 0x11, 0x11)),
FromStr::from_str("2a02:6b8::11:11"));
// too long group
let none: Option<IpAddr> = FromStr::from_str("::00000");
assert_eq!(None, none);
// too short
let none: Option<IpAddr> = FromStr::from_str("1:2:3:4:5:6:7");
assert_eq!(None, none);
// too long
let none: Option<IpAddr> = FromStr::from_str("1:2:3:4:5:6:7:8:9");
assert_eq!(None, none);
// triple colon
let none: Option<IpAddr> = FromStr::from_str("1:2:::6:7:8");
assert_eq!(None, none);
// two double colons
let none: Option<IpAddr> = FromStr::from_str("1:2::6::8");
assert_eq!(None, none);
}
#[test]
fn test_from_str_ipv4_in_ipv6() {
assert_eq!(Some(Ipv6Addr(0, 0, 0, 0, 0, 0, 49152, 545)),
FromStr::from_str("::192.0.2.33"));
assert_eq!(Some(Ipv6Addr(0, 0, 0, 0, 0, 0xFFFF, 49152, 545)),
FromStr::from_str("::FFFF:192.0.2.33"));
assert_eq!(Some(Ipv6Addr(0x64, 0xff9b, 0, 0, 0, 0, 49152, 545)),
FromStr::from_str("64:ff9b::192.0.2.33"));
assert_eq!(Some(Ipv6Addr(0x2001, 0xdb8, 0x122, 0xc000, 0x2, 0x2100, 49152, 545)),
FromStr::from_str("2001:db8:122:c000:2:2100:192.0.2.33"));
// colon after v4
let none: Option<IpAddr> = FromStr::from_str("::127.0.0.1:");
assert_eq!(None, none);
// not enough groups
let none: Option<IpAddr> = FromStr::from_str("1.2.3.4.5:127.0.0.1");
assert_eq!(None, none);
// too many groups
let none: Option<IpAddr> =
FromStr::from_str("1.2.3.4.5:6:7:127.0.0.1");
assert_eq!(None, none);
}
#[test]
fn test_from_str_socket_addr() {
assert_eq!(Some(SocketAddr { ip: Ipv4Addr(77, 88, 21, 11), port: 80 }),
FromStr::from_str("77.88.21.11:80"));
assert_eq!(Some(SocketAddr { ip: Ipv6Addr(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), port: 53 }),
FromStr::from_str("[2a02:6b8:0:1::1]:53"));
assert_eq!(Some(SocketAddr { ip: Ipv6Addr(0, 0, 0, 0, 0, 0, 0x7F00, 1), port: 22 }),
FromStr::from_str("[::127.0.0.1]:22"));
// without port
let none: Option<SocketAddr> = FromStr::from_str("127.0.0.1");
assert_eq!(None, none);
// without port
let none: Option<SocketAddr> = FromStr::from_str("127.0.0.1:");
assert_eq!(None, none);
// wrong brackets around v4
let none: Option<SocketAddr> = FromStr::from_str("[127.0.0.1]:22");
assert_eq!(None, none);
// port out of range
let none: Option<SocketAddr> = FromStr::from_str("127.0.0.1:123456");
assert_eq!(None, none);
}
#[test]
fn ipv6_addr_to_string() {
let a1 = Ipv6Addr(0, 0, 0, 0, 0, 0xffff, 0xc000, 0x280);
assert!(a1.to_string() == "::ffff:192.0.2.128" ||
a1.to_string() == "::FFFF:192.0.2.128");
assert_eq!(Ipv6Addr(8, 9, 10, 11, 12, 13, 14, 15).to_string(),
"8:9:a:b:c:d:e:f");
}
#[test]
fn to_socket_addr_socketaddr() {
let a = SocketAddr { ip: Ipv4Addr(77, 88, 21, 11), port: 12345 };
assert_eq!(Ok(a), a.to_socket_addr());
assert_eq!(Ok(vec![a]), a.to_socket_addr_all());
}
#[test]
fn to_socket_addr_ipaddr_u16() {
let a = Ipv4Addr(77, 88, 21, 11);
let p = 12345u16;
let e = SocketAddr { ip: a, port: p };
assert_eq!(Ok(e), (a, p).to_socket_addr());
assert_eq!(Ok(vec![e]), (a, p).to_socket_addr_all());
}
#[test]
fn to_socket_addr_str_u16() {
let a = SocketAddr { ip: Ipv4Addr(77, 88, 21, 11), port: 24352 };
assert_eq!(Ok(a), ("77.88.21.11", 24352u16).to_socket_addr());
assert_eq!(Ok(vec![a]), ("77.88.21.11", 24352u16).to_socket_addr_all());
let a = SocketAddr { ip: Ipv6Addr(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), port: 53 };
assert_eq!(Ok(a), ("2a02:6b8:0:1::1", 53).to_socket_addr());
assert_eq!(Ok(vec![a]), ("2a02:6b8:0:1::1", 53).to_socket_addr_all());
let a = SocketAddr { ip: Ipv4Addr(127, 0, 0, 1), port: 23924 };
assert!(("localhost", 23924u16).to_socket_addr_all().unwrap().contains(&a));
}
#[test]
fn to_socket_addr_str() {
let a = SocketAddr { ip: Ipv4Addr(77, 88, 21, 11), port: 24352 };
assert_eq!(Ok(a), "77.88.21.11:24352".to_socket_addr());
assert_eq!(Ok(vec![a]), "77.88.21.11:24352".to_socket_addr_all());
let a = SocketAddr { ip: Ipv6Addr(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), port: 53 };
assert_eq!(Ok(a), "[2a02:6b8:0:1::1]:53".to_socket_addr());
assert_eq!(Ok(vec![a]), "[2a02:6b8:0:1::1]:53".to_socket_addr_all());
let a = SocketAddr { ip: Ipv4Addr(127, 0, 0, 1), port: 23924 };
assert!("localhost:23924".to_socket_addr_all().unwrap().contains(&a));
}
}
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