Hack around broken macOS ECN ABI

2026-09-19 17:55:37 +00:00 · 2019-04-16 07:42:45 -07:00
parent 3c1e0df5d0
commit f55dbaf8d0
1 changed files with 10 additions and 1 deletions
@@ -158,7 +158,16 @@ impl super::UdpExt for UdpSocket {
                    cmsg::decode::<u8>(cmsg)
                },
                (libc::IPPROTO_IPV6, libc::IPV6_TCLASS) => unsafe {
-                    cmsg::decode::<libc::c_int>(cmsg) as u8
+                    // Temporary hack around broken macos ABI. Remove once upstream fixes it.
+                    // https://bugreport.apple.com/web/?problemID=48761855
+                    if cfg!(target_os = "macos")
+                        && cmsg.cmsg_len as usize
+                            == libc::CMSG_LEN(mem::size_of::<u8>() as _) as usize
+                    {
+                        cmsg::decode::<u8>(cmsg)
+                    } else {
+                        cmsg::decode::<libc::c_int>(cmsg) as u8
+                    }
                },
                _ => 0,
            },