Implment SO_ACCEPTCONN

net/socket/getsockopt.c

@@ -131,6 +131,16 @@ static int psock_socketlevel_option(FAR struct socket *psock, int option,
 
   switch (option)
     {
+      case SO_ACCEPTCONN: /* Reports whether socket listening is enabled */
+        if (*value_len < sizeof(int))
+          {
+            return -EINVAL;
+          }
+
+        *(FAR int *)value = _SS_ISLISTENING(psock->s_flags);
+        *value_len        = sizeof(int);
+        break;
+
       /* The following options take a point to an integer boolean value.
        * We will blindly report the bit here although the implementation
        * is outside of the scope of getsockopt.
@@ -268,7 +278,6 @@ static int psock_socketlevel_option(FAR struct socket *psock, int option,
 
       /* The following are not yet implemented (return values other than {0,1) */
 
-      case SO_ACCEPTCONN: /* Reports whether socket listening is enabled */
       case SO_LINGER:     /* Lingers on a close() if data is present */
       case SO_RCVBUF:     /* Sets receive buffer size */
       case SO_RCVLOWAT:   /* Sets the minimum number of bytes to input */