212     jclass cls = (*env)->FindClass(env, "java/io/FileDescriptor");

   212     jclass cls = (*env)->FindClass(env, "java/io/FileDescriptor");

   213     CHECK_NULL_RETURN(cls, NULL);

   213     CHECK_NULL_RETURN(cls, NULL);

   214     return (*env)->GetFieldID(env, cls, "fd", "I");

   214     return (*env)->GetFieldID(env, cls, "fd", "I");

   215 }

   215 }

   216 

   216 

   217 jint  IPv6_supported()

   223 jint  IPv6_supported()

   218 {

   224 {

   219     SOCKET s = socket(AF_INET6, SOCK_STREAM, 0) ;

   225     SOCKET s = socket(AF_INET6, SOCK_STREAM, 0) ;

   220     if (s == INVALID_SOCKET) {

   226     if (s == INVALID_SOCKET) {

   221         return JNI_FALSE;

   227         return JNI_FALSE;