Converts AddressFamily to struct with associated consts

changelog/2210.added.md

@@ -0,0 +1 @@
+Added more `AddressFamily` variants.

changelog/2210.changed.md

@@ -0,0 +1 @@
+Converted `AddressFamily` to struct with associated constants to support vendor-defined address families.

examples/getifaddrs.rs

@@ -29,7 +29,7 @@ fn main() {
         let family = addr
             .address
             .as_ref()
-            .and_then(SockaddrStorage::family)
+            .map(SockaddrStorage::family)
             .map(|af| format!("{:?}", af))
             .unwrap_or("".to_owned());
         match (

src/ifaddrs.rs

@@ -200,11 +200,10 @@ mod tests {
             } else {
                 continue;
             };
-            if sock.family() == Some(crate::sys::socket::AddressFamily::Inet) {
+            if sock.family() == crate::sys::socket::AddressFamily::INET {
                 let _ = sock.as_sockaddr_in().unwrap();
                 return;
-            } else if sock.family()
-                == Some(crate::sys::socket::AddressFamily::Inet6)
+            } else if sock.family() == crate::sys::socket::AddressFamily::INET6
             {
                 let _ = sock.as_sockaddr_in6().unwrap();
                 return;