Add struct `bpf_hdr` on macOS

libc-test/build.rs

@@ -170,6 +170,7 @@ fn main() {
         cfg.header("sys/xattr.h");
         cfg.header("sys/sys_domain.h");
         cfg.header("net/if_utun.h");
+        cfg.header("net/bpf.h");
         if target.starts_with("x86") {
             cfg.header("crt_externs.h");
         }

src/unix/bsd/apple/b32.rs

@@ -41,6 +41,13 @@ s! {
         pub ifi_reserved1: u32,
         pub ifi_reserved2: u32,
     }
+
+    pub struct bpf_hdr {
+        pub bh_tstamp: ::timeval,
+        pub bh_caplen: ::uint32_t,
+        pub bh_datalen: ::uint32_t,
+        pub bh_hdrlen: ::c_ushort,
+    }
 }
 
 pub const __PTHREAD_MUTEX_SIZE__: usize = 40;

src/unix/bsd/apple/b64.rs

@@ -46,6 +46,13 @@ s! {
         pub ifi_reserved1: u32,
         pub ifi_reserved2: u32,
     }
+
+    pub struct bpf_hdr {
+        pub bh_tstamp: ::timeval32,
+        pub bh_caplen: ::uint32_t,
+        pub bh_datalen: ::uint32_t,
+        pub bh_hdrlen: ::c_ushort,
+    }
 }
 
 pub const __PTHREAD_MUTEX_SIZE__: usize = 56;