From 8884ea38ec80d838138070e941c080b0b573575a Mon Sep 17 00:00:00 2001
From: Steven Engler <opara@cs.georgetown.edu>
Date: Mon, 7 Nov 2022 15:17:29 -0500
Subject: Added better support for unnamed unix socket addrs

---
 src/sys/socket/addr.rs | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'src/sys')

diff --git a/src/sys/socket/addr.rs b/src/sys/socket/addr.rs
index c7b5f29e..f051d205 100644
--- a/src/sys/socket/addr.rs
+++ b/src/sys/socket/addr.rs
@@ -885,6 +885,29 @@ impl UnixAddr {
         }
     }
 
+    /// Create a new `sockaddr_un` representing an "unnamed" unix socket address.
+    pub fn new_unnamed() -> UnixAddr {
+        #[allow(unused)]
+        let mut ret = libc::sockaddr_un {
+            sun_family: AddressFamily::Unix as sa_family_t,
+            .. unsafe { mem::zeroed() }
+        };
+
+        let sun_len: u8 = offset_of!(libc::sockaddr_un, sun_path).try_into().unwrap();
+
+        #[cfg(any(target_os = "dragonfly",
+                  target_os = "freebsd",
+                  target_os = "ios",
+                  target_os = "macos",
+                  target_os = "netbsd",
+                  target_os = "openbsd"))]
+        {
+            ret.sun_len = sun_len;
+        }
+
+        unsafe { UnixAddr::from_raw_parts(ret, sun_len) }
+    }
+
     /// Create a UnixAddr from a raw `sockaddr_un` struct and a size. `sun_len`
     /// is the size of the valid portion of the struct, excluding any trailing
     /// NUL.
@@ -941,6 +964,12 @@ impl UnixAddr {
         }
     }
 
+    /// Check if this address is an "unnamed" unix socket address.
+    #[inline]
+    pub fn is_unnamed(&self) -> bool {
+        matches!(self.kind(), UnixAddrKind::Unnamed)
+    }
+
     /// Returns the addrlen of this socket - `offsetof(struct sockaddr_un, sun_path)`
     #[inline]
     pub fn path_len(&self) -> usize {
-- 
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