support ABSTRACT_UNIX_SOCKET (#469)

this PR add supports for this feature: https://curl.se/libcurl/c/CURLOPT_ABSTRACT_UNIX_SOCKET.html

Author: ktmlm

curl-sys/lib.rs

@@ -605,6 +605,8 @@ pub const CURLOPT_PROXY_SSL_CIPHER_LIST: CURLoption = CURLOPTTYPE_OBJECTPOINT +
 pub const CURLOPT_PROXY_CRLFILE: CURLoption = CURLOPTTYPE_OBJECTPOINT + 260;
 pub const CURLOPT_PROXY_SSL_OPTIONS: CURLoption = CURLOPTTYPE_LONG + 261;
 
+pub const CURLOPT_ABSTRACT_UNIX_SOCKET: CURLoption = CURLOPTTYPE_OBJECTPOINT + 264;
+
 pub const CURLOPT_DOH_URL: CURLoption = CURLOPTTYPE_OBJECTPOINT + 279;
 pub const CURLOPT_UPLOAD_BUFFERSIZE: CURLoption = CURLOPTTYPE_LONG + 280;
 

src/easy/handle.rs

@@ -170,6 +170,14 @@ impl Easy {
         self.inner.unix_socket_path(path)
     }
 
+    /// Same as [`Easy2::abstract_unix_socket`](struct.Easy2.html#method.abstract_unix_socket)
+    ///
+    /// NOTE: this API can only be used on Linux OS.
+    #[cfg(target_os = "linux")]
+    pub fn abstract_unix_socket(&mut self, addr: &[u8]) -> Result<(), Error> {
+        self.inner.abstract_unix_socket(addr)
+    }
+
     // =========================================================================
     // Callback options
 

src/easy/handler.rs

@@ -807,6 +807,21 @@ impl<H> Easy2<H> {
         }
     }
 
+    /// Provides the ABSTRACT UNIX SOCKET which this handle will work with.
+    ///
+    /// This function is an alternative to [`Easy2::unix_socket`] and [`Easy2::unix_socket_path`] that supports
+    /// ABSTRACT_UNIX_SOCKET(`man 7 unix` on Linux) address.
+    ///
+    /// By default this option is not set and corresponds to
+    /// [`CURLOPT_ABSTRACT_UNIX_SOCKET`](https://curl.haxx.se/libcurl/c/CURLOPT_ABSTRACT_UNIX_SOCKET.html).
+    ///
+    /// NOTE: this API can only be used on Linux OS.
+    #[cfg(target_os = "linux")]
+    pub fn abstract_unix_socket(&mut self, addr: &[u8]) -> Result<(), Error> {
+        let addr = CString::new(addr)?;
+        self.setopt_str(curl_sys::CURLOPT_ABSTRACT_UNIX_SOCKET, &addr)
+    }
+
     // =========================================================================
     // Internal accessors
 

systest/build.rs

@@ -219,7 +219,8 @@ fn main() {
         s == "CURLSSLOPT_NO_REVOKE" ||
 
         // A lot of curl versions doesn't support unix sockets
-        s == "CURLOPT_UNIX_SOCKET_PATH" || s == "CURL_VERSION_UNIX_SOCKETS"
+        s == "CURLOPT_UNIX_SOCKET_PATH" || s == "CURL_VERSION_UNIX_SOCKETS" || s ==
+            "CURLOPT_ABSTRACT_UNIX_SOCKET"
     });
 
     if cfg!(target_env = "msvc") {