netflow: add service control; closes #1268

(cherry picked from commit 3222d5b2)

plist

@@ -48,6 +48,7 @@
 /usr/local/etc/inc/plugins.inc.d/igmpproxy.inc
 /usr/local/etc/inc/plugins.inc.d/ipfw.inc
 /usr/local/etc/inc/plugins.inc.d/miniupnpd.inc
+/usr/local/etc/inc/plugins.inc.d/netflow.inc
 /usr/local/etc/inc/plugins.inc.d/pf.inc
 /usr/local/etc/inc/plugins.inc.d/relayd.inc
 /usr/local/etc/inc/plugins.inc.d/relayd/dns.proto

src/etc/inc/plugins.inc.d/netflow.inc

+<?php
+
+/*
+    Copyright (C) 2016 Franco Fichtner <franco@opnsense.org>
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
+*/
+
+function netflow_enabled()
+{
+    $mdl = new \OPNsense\Diagnostics\Netflow();
+
+    return $mdl->collect->enable == '1';
+}
+
+function netflow_services()
+{
+    $services = array();
+
+    if (!netflow_enabled()) {
+        return $services;
+    }
+
+    $services[] = array(
+        'description' => gettext('NetFlow Capture'),
+        'configd' => array(
+            'restart' => array('netflow restart'),
+            'start' => array('netflow start'),
+            'stop' => array('netflow stop'),
+        ),
+        'name' => 'samplicate',
+    );
+
+    return $services;
+}