Auto merge of #866 - LuoZijun:patch-1, r=alexcrichton

Add struct `sockaddr_dl` for bsdlike platforms

Freebsd: https://github.com/freebsd/freebsd/blob/master/sys/net/if_dl.h#L59
Macos: https://github.com/apple/darwin-xnu/blob/master/bsd/net/if_dl.h#L95

Author: bors

libc-test/build.rs

@@ -173,13 +173,12 @@ fn main() {
             cfg.header("crt_externs.h");
         }
         cfg.header("net/route.h");
-        cfg.header("net/route.h");
         cfg.header("sys/proc_info.h");
     }
 
     if bsdlike {
         cfg.header("sys/event.h");
-
+        cfg.header("net/if_dl.h");
         if freebsd {
             cfg.header("libutil.h");
         } else {

src/unix/bsd/apple/mod.rs

@@ -476,6 +476,17 @@ s! {
         pub cmd: u32,
         pub cmdsize: u32,
     }
+
+    pub struct sockaddr_dl {
+        pub sdl_len: ::c_uchar,
+        pub sdl_family: ::c_uchar,
+        pub sdl_index: ::c_ushort,
+        pub sdl_type: ::c_uchar,
+        pub sdl_nlen: ::c_uchar,
+        pub sdl_alen: ::c_uchar,
+        pub sdl_slen: ::c_uchar,
+        pub sdl_data: [::c_char; 12],
+    }
 }
 
 pub const _UTX_USERSIZE: usize = 256;

src/unix/bsd/freebsdlike/dragonfly/mod.rs

@@ -168,6 +168,19 @@ s! {
         pub ifm_index: ::c_ushort,
         pub ifm_data: if_data,
     }
+
+    pub struct sockaddr_dl {
+        pub sdl_len: ::c_uchar,
+        pub sdl_family: ::c_uchar,
+        pub sdl_index: ::c_ushort,
+        pub sdl_type: ::c_uchar,
+        pub sdl_nlen: ::c_uchar,
+        pub sdl_alen: ::c_uchar,
+        pub sdl_slen: ::c_uchar,
+        pub sdl_data: [::c_char; 12],
+        pub sdl_rcf: ::c_ushort,
+        pub sdl_route: [::c_ushort; 16],
+    }
 }
 
 pub const RAND_MAX: ::c_int = 0x7fff_ffff;

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -135,6 +135,17 @@ s! {
         pub cr_groups: [::gid_t;16],
         __cr_unused1: *mut ::c_void,
     }
+
+    pub struct sockaddr_dl {
+        pub sdl_len: ::c_uchar,
+        pub sdl_family: ::c_uchar,
+        pub sdl_index: ::c_ushort,
+        pub sdl_type: ::c_uchar,
+        pub sdl_nlen: ::c_uchar,
+        pub sdl_alen: ::c_uchar,
+        pub sdl_slen: ::c_uchar,
+        pub sdl_data: [::c_char; 46],
+    }
 }
 
 pub const SIGEV_THREAD_ID: ::c_int = 4;

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -293,6 +293,17 @@ s! {
         pub sc_ngroups: ::c_int,
         pub sc_groups: [::gid_t; 1],
     }
+
+    pub struct sockaddr_dl {
+        pub sdl_len: ::c_uchar,
+        pub sdl_family: ::c_uchar,
+        pub sdl_index: ::c_ushort,
+        pub sdl_type: ::uint8_t,
+        pub sdl_nlen: ::uint8_t,
+        pub sdl_alen: ::uint8_t,
+        pub sdl_slen: ::uint8_t,
+        pub sdl_data: [::c_char; 12],
+    }
 }
 
 pub const AT_FDCWD: ::c_int = -100;

src/unix/bsd/netbsdlike/openbsdlike/mod.rs

@@ -176,6 +176,17 @@ s! {
         pub ifm_xflags: ::c_int,
         pub ifm_data: if_data,
     }
+
+    pub struct sockaddr_dl {
+        pub sdl_len: ::c_uchar,
+        pub sdl_family: ::c_uchar,
+        pub sdl_index: ::c_ushort,
+        pub sdl_type: ::c_uchar,
+        pub sdl_nlen: ::c_uchar,
+        pub sdl_alen: ::c_uchar,
+        pub sdl_slen: ::c_uchar,
+        pub sdl_data: [::c_char; 24],
+    }
 }
 
 pub const UT_NAMESIZE: usize = 32;