[API CHANGE] Do not call getaddrinfo if we just want the hostname

Similiar to afc41a467fdfabb2cd0879be3e4f1879a1d1dc91 ,
don't call getaddrinfo in getLocalHostname which calls DNS.

This causes a lag when creating the lockfile on opening a document
if the network is flaky/disabled.
See tdf#97931 and tdf#47179 for some problems caused by this.

For the one case where it is expected to call DNS, add a separate function
to restore the old behavior.

The (semantic) [API CHANGE] is in osl_getLocalHostname,
it does no longer return a FQDN.

Change-Id: I43455715a474ff6770351d1ce007c28aeb08f32e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/107554
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <samuel.mehrbrodt@allotropia.de>

1 files changed, 24 insertions, 0 deletions

diff --git a/sal/inc/oslsocket.hxx b/sal/inc/oslsocket.hxx
new file mode 100644
index 000000000000..52260c263190
--- /dev/null
+++ b/sal/inc/oslsocket.hxx
@@ -0,0 +1,24 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <rtl/ustring.h>
+#include <osl/socket.h>
+
+/** Retrieve this machines hostname as fully qualified domain name (FQDN).
+    Note that this might be slower than calling osl_getLocalHostname
+    since DNS needs to be queried to determine the FQDN.
+    @param  strLocalHostname out-parameter. The string that receives the local host name.
+    @retval sal_True upon success
+    @retval sal_False
+*/
+oslSocketResult osl_getLocalHostnameFQDN(rtl_uString** strLocalHostname);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
\ No newline at end of file