src/libstd/net/addr.rs

   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.
   4 //
   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.
  10
  11 use prelude::v1::*;
  12
  13 use fmt;
  14 use hash;
  15 use io;
  16 use mem;
  17 use net::{lookup_host, ntoh, hton, IpAddr, Ipv4Addr, Ipv6Addr};
  18 use option;
  19 use sys::net::netc as c;
  20 use sys_common::{FromInner, AsInner, IntoInner};
  21 use vec;
  22 use iter;
  23 use slice;
  24
  25 /// Representation of a socket address for networking applications.
  26 ///
  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")]
  32 pub enum SocketAddr {
  33     /// An IPv4 socket address which is a (ip, port) combination.
  34     #[stable(feature = "rust1", since = "1.0.0")]
  35     V4(#[stable(feature = "rust1", since = "1.0.0")] SocketAddrV4),
  36     /// An IPv6 socket address
  37     #[stable(feature = "rust1", since = "1.0.0")]
  38     V6(#[stable(feature = "rust1", since = "1.0.0")] SocketAddrV6),
  39 }
  40
  41 /// An IPv4 socket address which is a (ip, port) combination.
  42 #[derive(Copy)]
  43 #[stable(feature = "rust1", since = "1.0.0")]
  44 pub struct SocketAddrV4 { inner: c::sockaddr_in }
  45
  46 /// An IPv6 socket address.
  47 #[derive(Copy)]
  48 #[stable(feature = "rust1", since = "1.0.0")]
  49 pub struct SocketAddrV6 { inner: c::sockaddr_in6 }
  50
  51 impl SocketAddr {
  52     /// Creates a new socket address from the (ip, port) pair.
  53     #[stable(feature = "ip_addr", since = "1.7.0")]
  54     pub fn new(ip: IpAddr, port: u16) -> SocketAddr {
  55         match ip {
  56             IpAddr::V4(a) => SocketAddr::V4(SocketAddrV4::new(a, port)),
  57             IpAddr::V6(a) => SocketAddr::V6(SocketAddrV6::new(a, port, 0, 0)),
  58         }
  59     }
  60
  61     /// Returns the IP address associated with this socket address.
  62     #[stable(feature = "ip_addr", since = "1.7.0")]
  63     pub fn ip(&self) -> IpAddr {
  64         match *self {
  65             SocketAddr::V4(ref a) => IpAddr::V4(*a.ip()),
  66             SocketAddr::V6(ref a) => IpAddr::V6(*a.ip()),
  67         }
  68     }
  69
  70     /// Change the IP address associated with this socket address.
  71     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
  72     pub fn set_ip(&mut self, new_ip: IpAddr) {
  73         // `match (*self, new_ip)` would have us mutate a copy of self only to throw it away.
  74         match (self, new_ip) {
  75             (&mut SocketAddr::V4(ref mut a), IpAddr::V4(new_ip)) => a.set_ip(new_ip),
  76             (&mut SocketAddr::V6(ref mut a), IpAddr::V6(new_ip)) => a.set_ip(new_ip),
  77             (self_, new_ip) => *self_ = Self::new(new_ip, self_.port()),
  78         }
  79     }
  80
  81     /// Returns the port number associated with this socket address.
  82     #[stable(feature = "rust1", since = "1.0.0")]
  83     pub fn port(&self) -> u16 {
  84         match *self {
  85             SocketAddr::V4(ref a) => a.port(),
  86             SocketAddr::V6(ref a) => a.port(),
  87         }
  88     }
  89
  90     /// Change the port number associated with this socket address.
  91     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
  92     pub fn set_port(&mut self, new_port: u16) {
  93         match *self {
  94             SocketAddr::V4(ref mut a) => a.set_port(new_port),
  95             SocketAddr::V6(ref mut a) => a.set_port(new_port),
  96         }
  97     }
  98 }
  99
 100 impl SocketAddrV4 {
 101     /// Creates a new socket address from the (ip, port) pair.
 102     #[stable(feature = "rust1", since = "1.0.0")]
 103     pub fn new(ip: Ipv4Addr, port: u16) -> SocketAddrV4 {
 104         SocketAddrV4 {
 105             inner: c::sockaddr_in {
 106                 sin_family: c::AF_INET as c::sa_family_t,
 107                 sin_port: hton(port),
 108                 sin_addr: *ip.as_inner(),
 109                 .. unsafe { mem::zeroed() }
 110             },
 111         }
 112     }
 113
 114     /// Returns the IP address associated with this socket address.
 115     #[stable(feature = "rust1", since = "1.0.0")]
 116     pub fn ip(&self) -> &Ipv4Addr {
 117         unsafe {
 118             &*(&self.inner.sin_addr as *const c::in_addr as *const Ipv4Addr)
 119         }
 120     }
 121
 122     /// Change the IP address associated with this socket address.
 123     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
 124     pub fn set_ip(&mut self, new_ip: Ipv4Addr) {
 125         self.inner.sin_addr = *new_ip.as_inner()
 126     }
 127
 128     /// Returns the port number associated with this socket address.
 129     #[stable(feature = "rust1", since = "1.0.0")]
 130     pub fn port(&self) -> u16 {
 131         ntoh(self.inner.sin_port)
 132     }
 133
 134     /// Change the port number associated with this socket address.
 135     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
 136     pub fn set_port(&mut self, new_port: u16) {
 137         self.inner.sin_port = hton(new_port);
 138     }
 139 }
 140
 141 impl SocketAddrV6 {
 142     /// Creates a new socket address from the ip/port/flowinfo/scope_id
 143     /// components.
 144     #[stable(feature = "rust1", since = "1.0.0")]
 145     pub fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32)
 146                -> SocketAddrV6 {
 147         SocketAddrV6 {
 148             inner: c::sockaddr_in6 {
 149                 sin6_family: c::AF_INET6 as c::sa_family_t,
 150                 sin6_port: hton(port),
 151                 sin6_addr: *ip.as_inner(),
 152                 sin6_flowinfo: flowinfo,
 153                 sin6_scope_id: scope_id,
 154                 .. unsafe { mem::zeroed() }
 155             },
 156         }
 157     }
 158
 159     /// Returns the IP address associated with this socket address.
 160     #[stable(feature = "rust1", since = "1.0.0")]
 161     pub fn ip(&self) -> &Ipv6Addr {
 162         unsafe {
 163             &*(&self.inner.sin6_addr as *const c::in6_addr as *const Ipv6Addr)
 164         }
 165     }
 166
 167     /// Change the IP address associated with this socket address.
 168     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
 169     pub fn set_ip(&mut self, new_ip: Ipv6Addr) {
 170         self.inner.sin6_addr = *new_ip.as_inner()
 171     }
 172
 173     /// Returns the port number associated with this socket address.
 174     #[stable(feature = "rust1", since = "1.0.0")]
 175     pub fn port(&self) -> u16 {
 176         ntoh(self.inner.sin6_port)
 177     }
 178
 179     /// Change the port number associated with this socket address.
 180     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
 181     pub fn set_port(&mut self, new_port: u16) {
 182         self.inner.sin6_port = hton(new_port);
 183     }
 184
 185     /// Returns the flow information associated with this address,
 186     /// corresponding to the `sin6_flowinfo` field in C.
 187     #[stable(feature = "rust1", since = "1.0.0")]
 188     pub fn flowinfo(&self) -> u32 {
 189         self.inner.sin6_flowinfo
 190     }
 191
 192     /// Change the flow information associated with this socket address.
 193     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
 194     pub fn set_flowinfo(&mut self, new_flowinfo: u32) {
 195         self.inner.sin6_flowinfo = new_flowinfo;
 196     }
 197
 198     /// Returns the scope ID associated with this address,
 199     /// corresponding to the `sin6_scope_id` field in C.
 200     #[stable(feature = "rust1", since = "1.0.0")]
 201     pub fn scope_id(&self) -> u32 {
 202         self.inner.sin6_scope_id
 203     }
 204
 205     /// Change the scope ID associated with this socket address.
 206     #[stable(feature = "sockaddr_setters", since = "1.9.0")]
 207     pub fn set_scope_id(&mut self, new_scope_id: u32) {
 208         self.inner.sin6_scope_id = new_scope_id;
 209     }
 210 }
 211
 212 impl FromInner<c::sockaddr_in> for SocketAddrV4 {
 213     fn from_inner(addr: c::sockaddr_in) -> SocketAddrV4 {
 214         SocketAddrV4 { inner: addr }
 215     }
 216 }
 217
 218 impl FromInner<c::sockaddr_in6> for SocketAddrV6 {
 219     fn from_inner(addr: c::sockaddr_in6) -> SocketAddrV6 {
 220         SocketAddrV6 { inner: addr }
 221     }
 222 }
 223
 224 impl<'a> IntoInner<(*const c::sockaddr, c::socklen_t)> for &'a SocketAddr {
 225     fn into_inner(self) -> (*const c::sockaddr, c::socklen_t) {
 226         match *self {
 227             SocketAddr::V4(ref a) => {
 228                 (a as *const _ as *const _, mem::size_of_val(a) as c::socklen_t)
 229             }
 230             SocketAddr::V6(ref a) => {
 231                 (a as *const _ as *const _, mem::size_of_val(a) as c::socklen_t)
 232             }
 233         }
 234     }
 235 }
 236
 237 #[stable(feature = "rust1", since = "1.0.0")]
 238 impl fmt::Display for SocketAddr {
 239     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 240         match *self {
 241             SocketAddr::V4(ref a) => a.fmt(f),
 242             SocketAddr::V6(ref a) => a.fmt(f),
 243         }
 244     }
 245 }
 246
 247 #[stable(feature = "rust1", since = "1.0.0")]
 248 impl fmt::Display for SocketAddrV4 {
 249     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 250         write!(f, "{}:{}", self.ip(), self.port())
 251     }
 252 }
 253
 254 #[stable(feature = "rust1", since = "1.0.0")]
 255 impl fmt::Debug for SocketAddrV4 {
 256     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
 257         fmt::Display::fmt(self, fmt)
 258     }
 259 }
 260
 261 #[stable(feature = "rust1", since = "1.0.0")]
 262 impl fmt::Display for SocketAddrV6 {
 263     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 264         write!(f, "[{}]:{}", self.ip(), self.port())
 265     }
 266 }
 267
 268 #[stable(feature = "rust1", since = "1.0.0")]
 269 impl fmt::Debug for SocketAddrV6 {
 270     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
 271         fmt::Display::fmt(self, fmt)
 272     }
 273 }
 274
 275 #[stable(feature = "rust1", since = "1.0.0")]
 276 impl Clone for SocketAddrV4 {
 277     fn clone(&self) -> SocketAddrV4 { *self }
 278 }
 279 #[stable(feature = "rust1", since = "1.0.0")]
 280 impl Clone for SocketAddrV6 {
 281     fn clone(&self) -> SocketAddrV6 { *self }
 282 }
 283
 284 #[stable(feature = "rust1", since = "1.0.0")]
 285 impl PartialEq for SocketAddrV4 {
 286     fn eq(&self, other: &SocketAddrV4) -> bool {
 287         self.inner.sin_port == other.inner.sin_port &&
 288             self.inner.sin_addr.s_addr == other.inner.sin_addr.s_addr
 289     }
 290 }
 291 #[stable(feature = "rust1", since = "1.0.0")]
 292 impl PartialEq for SocketAddrV6 {
 293     fn eq(&self, other: &SocketAddrV6) -> bool {
 294         self.inner.sin6_port == other.inner.sin6_port &&
 295             self.inner.sin6_addr.s6_addr == other.inner.sin6_addr.s6_addr &&
 296             self.inner.sin6_flowinfo == other.inner.sin6_flowinfo &&
 297             self.inner.sin6_scope_id == other.inner.sin6_scope_id
 298     }
 299 }
 300 #[stable(feature = "rust1", since = "1.0.0")]
 301 impl Eq for SocketAddrV4 {}
 302 #[stable(feature = "rust1", since = "1.0.0")]
 303 impl Eq for SocketAddrV6 {}
 304
 305 #[stable(feature = "rust1", since = "1.0.0")]
 306 impl hash::Hash for SocketAddrV4 {
 307     fn hash<H: hash::Hasher>(&self, s: &mut H) {
 308         (self.inner.sin_port, self.inner.sin_addr.s_addr).hash(s)
 309     }
 310 }
 311 #[stable(feature = "rust1", since = "1.0.0")]
 312 impl hash::Hash for SocketAddrV6 {
 313     fn hash<H: hash::Hasher>(&self, s: &mut H) {
 314         (self.inner.sin6_port, &self.inner.sin6_addr.s6_addr,
 315          self.inner.sin6_flowinfo, self.inner.sin6_scope_id).hash(s)
 316     }
 317 }
 318
 319 /// A trait for objects which can be converted or resolved to one or more
 320 /// `SocketAddr` values.
 321 ///
 322 /// This trait is used for generic address resolution when constructing network
 323 /// objects.  By default it is implemented for the following types:
 324 ///
 325 ///  * `SocketAddr`, `SocketAddrV4`, `SocketAddrV6` - `to_socket_addrs` is
 326 ///    identity function.
 327 ///
 328 ///  * `(IpvNAddr, u16)` - `to_socket_addrs` constructs `SocketAddr` trivially.
 329 ///
 330 ///  * `(&str, u16)` - the string should be either a string representation of an
 331 ///    IP address expected by `FromStr` implementation for `IpvNAddr` or a host
 332 ///    name.
 333 ///
 334 ///  * `&str` - the string should be either a string representation of a
 335 ///    `SocketAddr` as expected by its `FromStr` implementation or a string like
 336 ///    `<host_name>:<port>` pair where `<port>` is a `u16` value.
 337 ///
 338 /// This trait allows constructing network objects like `TcpStream` or
 339 /// `UdpSocket` easily with values of various types for the bind/connection
 340 /// address. It is needed because sometimes one type is more appropriate than
 341 /// the other: for simple uses a string like `"localhost:12345"` is much nicer
 342 /// than manual construction of the corresponding `SocketAddr`, but sometimes
 343 /// `SocketAddr` value is *the* main source of the address, and converting it to
 344 /// some other type (e.g. a string) just for it to be converted back to
 345 /// `SocketAddr` in constructor methods is pointless.
 346 ///
 347 /// Some examples:
 348 ///
 349 /// ```no_run
 350 /// use std::net::{SocketAddrV4, TcpStream, UdpSocket, TcpListener, Ipv4Addr};
 351 ///
 352 /// fn main() {
 353 ///     let ip = Ipv4Addr::new(127, 0, 0, 1);
 354 ///     let port = 12345;
 355 ///
 356 ///     // The following lines are equivalent modulo possible "localhost" name
 357 ///     // resolution differences
 358 ///     let tcp_s = TcpStream::connect(SocketAddrV4::new(ip, port));
 359 ///     let tcp_s = TcpStream::connect((ip, port));
 360 ///     let tcp_s = TcpStream::connect(("127.0.0.1", port));
 361 ///     let tcp_s = TcpStream::connect(("localhost", port));
 362 ///     let tcp_s = TcpStream::connect("127.0.0.1:12345");
 363 ///     let tcp_s = TcpStream::connect("localhost:12345");
 364 ///
 365 ///     // TcpListener::bind(), UdpSocket::bind() and UdpSocket::send_to()
 366 ///     // behave similarly
 367 ///     let tcp_l = TcpListener::bind("localhost:12345");
 368 ///
 369 ///     let mut udp_s = UdpSocket::bind(("127.0.0.1", port)).unwrap();
 370 ///     udp_s.send_to(&[7], (ip, 23451)).unwrap();
 371 /// }
 372 /// ```
 373 #[stable(feature = "rust1", since = "1.0.0")]
 374 pub trait ToSocketAddrs {
 375     /// Returned iterator over socket addresses which this type may correspond
 376     /// to.
 377     #[stable(feature = "rust1", since = "1.0.0")]
 378     type Iter: Iterator<Item=SocketAddr>;
 379
 380     /// Converts this object to an iterator of resolved `SocketAddr`s.
 381     ///
 382     /// The returned iterator may not actually yield any values depending on the
 383     /// outcome of any resolution performed.
 384     ///
 385     /// Note that this function may block the current thread while resolution is
 386     /// performed.
 387     ///
 388     /// # Errors
 389     ///
 390     /// Any errors encountered during resolution will be returned as an `Err`.
 391     #[stable(feature = "rust1", since = "1.0.0")]
 392     fn to_socket_addrs(&self) -> io::Result<Self::Iter>;
 393 }
 394
 395 #[stable(feature = "rust1", since = "1.0.0")]
 396 impl ToSocketAddrs for SocketAddr {
 397     type Iter = option::IntoIter<SocketAddr>;
 398     fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
 399         Ok(Some(*self).into_iter())
 400     }
 401 }
 402
 403 #[stable(feature = "rust1", since = "1.0.0")]
 404 impl ToSocketAddrs for SocketAddrV4 {
 405     type Iter = option::IntoIter<SocketAddr>;
 406     fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
 407         SocketAddr::V4(*self).to_socket_addrs()
 408     }
 409 }
 410
 411 #[stable(feature = "rust1", since = "1.0.0")]
 412 impl ToSocketAddrs for SocketAddrV6 {
 413     type Iter = option::IntoIter<SocketAddr>;
 414     fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
 415         SocketAddr::V6(*self).to_socket_addrs()
 416     }
 417 }
 418
 419 #[stable(feature = "rust1", since = "1.0.0")]
 420 impl ToSocketAddrs for (IpAddr, u16) {
 421     type Iter = option::IntoIter<SocketAddr>;
 422     fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
 423         let (ip, port) = *self;
 424         match ip {
 425             IpAddr::V4(ref a) => (*a, port).to_socket_addrs(),
 426             IpAddr::V6(ref a) => (*a, port).to_socket_addrs(),
 427         }
 428     }
 429 }
 430
 431 #[stable(feature = "rust1", since = "1.0.0")]
 432 impl ToSocketAddrs for (Ipv4Addr, u16) {
 433     type Iter = option::IntoIter<SocketAddr>;
 434     fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
 435         let (ip, port) = *self;
 436         SocketAddrV4::new(ip, port).to_socket_addrs()
 437     }
 438 }
 439
 440 #[stable(feature = "rust1", since = "1.0.0")]
 441 impl ToSocketAddrs for (Ipv6Addr, u16) {
 442     type Iter = option::IntoIter<SocketAddr>;
 443     fn to_socket_addrs(&self) -> io::Result<option::IntoIter<SocketAddr>> {
 444         let (ip, port) = *self;
 445         SocketAddrV6::new(ip, port, 0, 0).to_socket_addrs()
 446     }
 447 }
 448
 449 fn resolve_socket_addr(s: &str, p: u16) -> io::Result<vec::IntoIter<SocketAddr>> {
 450     let ips = lookup_host(s)?;
 451     let v: Vec<_> = ips.map(|a| {
 452         a.map(|mut a| {
 453             a.set_port(p);
 454             a
 455         })
 456     }).collect()?;
 457     Ok(v.into_iter())
 458 }
 459
 460 #[stable(feature = "rust1", since = "1.0.0")]
 461 impl<'a> ToSocketAddrs for (&'a str, u16) {
 462     type Iter = vec::IntoIter<SocketAddr>;
 463     fn to_socket_addrs(&self) -> io::Result<vec::IntoIter<SocketAddr>> {
 464         let (host, port) = *self;
 465
 466         // try to parse the host as a regular IP address first
 467         if let Ok(addr) = host.parse::<Ipv4Addr>() {
 468             let addr = SocketAddrV4::new(addr, port);
 469             return Ok(vec![SocketAddr::V4(addr)].into_iter())
 470         }
 471         if let Ok(addr) = host.parse::<Ipv6Addr>() {
 472             let addr = SocketAddrV6::new(addr, port, 0, 0);
 473             return Ok(vec![SocketAddr::V6(addr)].into_iter())
 474         }
 475
 476         resolve_socket_addr(host, port)
 477     }
 478 }
 479
 480 // accepts strings like 'localhost:12345'
 481 #[stable(feature = "rust1", since = "1.0.0")]
 482 impl ToSocketAddrs for str {
 483     type Iter = vec::IntoIter<SocketAddr>;
 484     fn to_socket_addrs(&self) -> io::Result<vec::IntoIter<SocketAddr>> {
 485         // try to parse as a regular SocketAddr first
 486         if let Some(addr) = self.parse().ok() {
 487             return Ok(vec![addr].into_iter());
 488         }
 489
 490         macro_rules! try_opt {
 491             ($e:expr, $msg:expr) => (
 492                 match $e {
 493                     Some(r) => r,
 494                     None => return Err(io::Error::new(io::ErrorKind::InvalidInput,
 495                                                       $msg)),
 496                 }
 497             )
 498         }
 499
 500         // split the string by ':' and convert the second part to u16
 501         let mut parts_iter = self.rsplitn(2, ':');
 502         let port_str = try_opt!(parts_iter.next(), "invalid socket address");
 503         let host = try_opt!(parts_iter.next(), "invalid socket address");
 504         let port: u16 = try_opt!(port_str.parse().ok(), "invalid port value");
 505         resolve_socket_addr(host, port)
 506     }
 507 }
 508
 509 #[stable(feature = "slice_to_socket_addrs", since = "1.8.0")]
 510 impl<'a> ToSocketAddrs for &'a [SocketAddr] {
 511     type Iter = iter::Cloned<slice::Iter<'a, SocketAddr>>;
 512
 513     fn to_socket_addrs(&self) -> io::Result<Self::Iter> {
 514         Ok(self.iter().cloned())
 515     }
 516 }
 517
 518 #[stable(feature = "rust1", since = "1.0.0")]
 519 impl<'a, T: ToSocketAddrs + ?Sized> ToSocketAddrs for &'a T {
 520     type Iter = T::Iter;
 521     fn to_socket_addrs(&self) -> io::Result<T::Iter> {
 522         (**self).to_socket_addrs()
 523     }
 524 }
 525
 526 #[cfg(test)]
 527 mod tests {
 528     use prelude::v1::*;
 529     use net::*;
 530     use net::test::{tsa, sa6, sa4};
 531
 532     #[test]
 533     fn to_socket_addr_ipaddr_u16() {
 534         let a = Ipv4Addr::new(77, 88, 21, 11);
 535         let p = 12345;
 536         let e = SocketAddr::V4(SocketAddrV4::new(a, p));
 537         assert_eq!(Ok(vec![e]), tsa((a, p)));
 538     }
 539
 540     #[test]
 541     fn to_socket_addr_str_u16() {
 542         let a = sa4(Ipv4Addr::new(77, 88, 21, 11), 24352);
 543         assert_eq!(Ok(vec![a]), tsa(("77.88.21.11", 24352)));
 544
 545         let a = sa6(Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), 53);
 546         assert_eq!(Ok(vec![a]), tsa(("2a02:6b8:0:1::1", 53)));
 547
 548         let a = sa4(Ipv4Addr::new(127, 0, 0, 1), 23924);
 549         assert!(tsa(("localhost", 23924)).unwrap().contains(&a));
 550     }
 551
 552     #[test]
 553     fn to_socket_addr_str() {
 554         let a = sa4(Ipv4Addr::new(77, 88, 21, 11), 24352);
 555         assert_eq!(Ok(vec![a]), tsa("77.88.21.11:24352"));
 556
 557         let a = sa6(Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), 53);
 558         assert_eq!(Ok(vec![a]), tsa("[2a02:6b8:0:1::1]:53"));
 559
 560         let a = sa4(Ipv4Addr::new(127, 0, 0, 1), 23924);
 561         assert!(tsa("localhost:23924").unwrap().contains(&a));
 562     }
 563
 564     // FIXME: figure out why this fails on openbsd and bitrig and fix it
 565     #[test]
 566     #[cfg(not(any(windows, target_os = "openbsd", target_os = "bitrig")))]
 567     fn to_socket_addr_str_bad() {
 568         assert!(tsa("1200::AB00:1234::2552:7777:1313:34300").is_err());
 569     }
 570
 571     #[test]
 572     fn set_ip() {
 573         fn ip4(low: u8) -> Ipv4Addr { Ipv4Addr::new(77, 88, 21, low) }
 574         fn ip6(low: u16) -> Ipv6Addr { Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, low) }
 575
 576         let mut v4 = SocketAddrV4::new(ip4(11), 80);
 577         assert_eq!(v4.ip(), &ip4(11));
 578         v4.set_ip(ip4(12));
 579         assert_eq!(v4.ip(), &ip4(12));
 580
 581         let mut addr = SocketAddr::V4(v4);
 582         assert_eq!(addr.ip(), IpAddr::V4(ip4(12)));
 583         addr.set_ip(IpAddr::V4(ip4(13)));
 584         assert_eq!(addr.ip(), IpAddr::V4(ip4(13)));
 585         addr.set_ip(IpAddr::V6(ip6(14)));
 586         assert_eq!(addr.ip(), IpAddr::V6(ip6(14)));
 587
 588         let mut v6 = SocketAddrV6::new(ip6(1), 80, 0, 0);
 589         assert_eq!(v6.ip(), &ip6(1));
 590         v6.set_ip(ip6(2));
 591         assert_eq!(v6.ip(), &ip6(2));
 592
 593         let mut addr = SocketAddr::V6(v6);
 594         assert_eq!(addr.ip(), IpAddr::V6(ip6(2)));
 595         addr.set_ip(IpAddr::V6(ip6(3)));
 596         assert_eq!(addr.ip(), IpAddr::V6(ip6(3)));
 597         addr.set_ip(IpAddr::V4(ip4(4)));
 598         assert_eq!(addr.ip(), IpAddr::V4(ip4(4)));
 599     }
 600
 601     #[test]
 602     fn set_port() {
 603         let mut v4 = SocketAddrV4::new(Ipv4Addr::new(77, 88, 21, 11), 80);
 604         assert_eq!(v4.port(), 80);
 605         v4.set_port(443);
 606         assert_eq!(v4.port(), 443);
 607
 608         let mut addr = SocketAddr::V4(v4);
 609         assert_eq!(addr.port(), 443);
 610         addr.set_port(8080);
 611         assert_eq!(addr.port(), 8080);
 612
 613         let mut v6 = SocketAddrV6::new(Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), 80, 0, 0);
 614         assert_eq!(v6.port(), 80);
 615         v6.set_port(443);
 616         assert_eq!(v6.port(), 443);
 617
 618         let mut addr = SocketAddr::V6(v6);
 619         assert_eq!(addr.port(), 443);
 620         addr.set_port(8080);
 621         assert_eq!(addr.port(), 8080);
 622     }
 623
 624     #[test]
 625     fn set_flowinfo() {
 626         let mut v6 = SocketAddrV6::new(Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), 80, 10, 0);
 627         assert_eq!(v6.flowinfo(), 10);
 628         v6.set_flowinfo(20);
 629         assert_eq!(v6.flowinfo(), 20);
 630     }
 631
 632     #[test]
 633     fn set_scope_id() {
 634         let mut v6 = SocketAddrV6::new(Ipv6Addr::new(0x2a02, 0x6b8, 0, 1, 0, 0, 0, 1), 80, 0, 10);
 635         assert_eq!(v6.scope_id(), 10);
 636         v6.set_scope_id(20);
 637         assert_eq!(v6.scope_id(), 20);
 638     }
 639 }