add openssl async error code

openssl-sys/src/ssl.rs

@@ -306,6 +306,8 @@ pub const SSL_ERROR_SSL: c_int = 1;
 pub const SSL_ERROR_SYSCALL: c_int = 5;
 pub const SSL_ERROR_WANT_ACCEPT: c_int = 8;
 pub const SSL_ERROR_WANT_CONNECT: c_int = 7;
+pub const SSL_ERROR_WANT_ASYNC: c_int = 9;
+pub const SSL_ERROR_WANT_ASYNC_JOB: c_int = 10;
 pub const SSL_ERROR_WANT_READ: c_int = 2;
 pub const SSL_ERROR_WANT_WRITE: c_int = 3;
 pub const SSL_ERROR_WANT_X509_LOOKUP: c_int = 4;

openssl/src/ssl/error.rs

@@ -16,6 +16,23 @@ impl ErrorCode {
     /// The SSL session has been closed.
     pub const ZERO_RETURN: ErrorCode = ErrorCode(ffi::SSL_ERROR_ZERO_RETURN);
 
+    /// The operation did not complete because an asynchronous engine is still
+    /// processing data.
+    ///
+    /// This will only occur if the mode has been set to SSL_MODE_ASYNC.
+    ///
+    /// Wait for async engine by using async job APIs and retry the operation.
+    pub const WANT_ASYNC: ErrorCode = ErrorCode(ffi::SSL_ERROR_WANT_ASYNC);
+
+    /// The asynchronous job could not be started because there were no async jobs
+    /// available in the pool.
+    ///
+    /// This will only occur if the mode has been set to SSL_MODE_ASYNC.
+    ///
+    /// Retry the operation after a currently executing asynchronous operation
+    /// for the current thread has completed
+    pub const WANT_ASYNC_JOB: ErrorCode = ErrorCode(ffi::SSL_ERROR_WANT_ASYNC_JOB);
+
     /// An attempt to read data from the underlying socket returned `WouldBlock`.
     ///
     /// Wait for read readiness and retry the operation.