Merge #813

813: Support `EtherAddr` and impl `Debug` for `InterfaceAddress/SockAddr` r=Susurrus a=LuoZijun

1. Add `EtherAddr` .
2. impl `Debug` for `InterfaceAddress` and `SockAddr`.
  
Closes #809

CHANGELOG.md

@@ -52,6 +52,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   ([#814](https://github.com/nix-rust/nix/pull/814))
 - Added `sigprocmask` to the signal module.
   ([#826](https://github.com/nix-rust/nix/pull/826))
+- Added `nix::sys::socket::LinkAddr` on Linux and all bsdlike system.
+  ([#813](https://github.com/nix-rust/nix/pull/813))
 
 ### Changed
 - Use native `pipe2` on all BSD targets.  Users should notice no difference.

src/ifaddrs.rs

@@ -4,7 +4,6 @@
 //! of interfaces and their associated addresses.
 
 use std::ffi;
-use std::fmt;
 use std::iter::Iterator;
 use std::mem;
 use std::option::Option;
@@ -16,7 +15,7 @@ use sys::socket::SockAddr;
 use net::if_::*;
 
 /// Describes a single address for an interface as returned by `getifaddrs`.
-#[derive(Clone, Eq, Hash, PartialEq)]
+#[derive(Clone, Eq, Hash, PartialEq, Debug)]
 pub struct InterfaceAddress {
     /// Name of the network interface
     pub interface_name: String,
@@ -32,12 +31,6 @@ pub struct InterfaceAddress {
     pub destination: Option<SockAddr>,
 }
 
-impl fmt::Debug for InterfaceAddress {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "InterfaceAddress ({:?})", self.interface_name)
-    }
-}
-
 cfg_if! {
     if #[cfg(any(target_os = "emscripten", target_os = "fuchsia", target_os = "linux"))] {
         fn get_ifu_from_sockaddr(info: &libc::ifaddrs) -> *const libc::sockaddr {