timesyncd: split up into multiple source file

The source file got much too large, hence split up the sources into
multiple per-object files, similar in style to resolved.

src/libsystemd/sd-network/network-util.c

@@ -0,0 +1,37 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "strv.h"
+#include "network-util.h"
+
+bool network_is_online(void) {
+        _cleanup_free_ char *state = NULL;
+        int r;
+
+        r = sd_network_get_operational_state(&state);
+        if (r < 0) /* if we don't know anything, we consider the system online */
+                return true;
+
+        if (STR_IN_SET(state, "routable", "degraded"))
+                return true;
+
+        return false;
+}

src/libsystemd/sd-network/network-util.h

@@ -25,5 +25,6 @@
 #include "sd-network.h"
 
 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_network_monitor*, sd_network_monitor_unref);
-
 #define _cleanup_network_monitor_unref_ _cleanup_(sd_network_monitor_unrefp)
+
+bool network_is_online(void);