Add socklen_t type alias

Author: Darksonn

Cargo.toml

@@ -70,4 +70,6 @@ all = []
 [package.metadata.cargo_check_external_types]
 allowed_external_types = [
   "libc::*",
+  # Referenced via a type alias.
+  "windows_sys::Win32::Networking::WinSock::socklen_t",
 ]

src/lib.rs

@@ -185,7 +185,7 @@ compile_error!("Socket2 doesn't support the compile target");
 
 use sys::c_int;
 
-pub use sockaddr::SockAddr;
+pub use sockaddr::{socklen_t, SockAddr};
 pub use socket::Socket;
 pub use sockref::SockRef;
 

src/sockaddr.rs

@@ -8,11 +8,15 @@ use std::{fmt, io, ptr};
 use windows_sys::Win32::Networking::WinSock::SOCKADDR_IN6_0;
 
 use crate::sys::{
-    c_int, sa_family_t, sockaddr, sockaddr_in, sockaddr_in6, sockaddr_storage, socklen_t, AF_INET,
-    AF_INET6, AF_UNIX,
+    c_int, sa_family_t, sockaddr, sockaddr_in, sockaddr_in6, sockaddr_storage, AF_INET, AF_INET6,
+    AF_UNIX,
 };
 use crate::Domain;
 
+/// The integer type used with `getsockname` on this platform.
+#[allow(non_camel_case_types)]
+pub type socklen_t = crate::sys::socklen_t;
+
 /// The address of a socket.
 ///
 /// `SockAddr`s may be constructed directly to and from the standard library