From e3da64769f9a65fc0d2af2345d1008a359d14821 Mon Sep 17 00:00:00 2001
From: Jan Wagner <waja@cyconet.org>
Date: Mon, 18 Nov 2013 14:49:37 +0100
Subject: [PATCH] Add check_openvpn

---
 check_openvpn/Makefile          |  4 ++
 check_openvpn/check_openvpn     | 86 +++++++++++++++++++++++++++++++++
 check_openvpn/check_openvpn.cfg |  6 +++
 check_openvpn/control           |  6 +++
 check_openvpn/copyright         | 21 ++++++++
 5 files changed, 123 insertions(+)
 create mode 100644 check_openvpn/Makefile
 create mode 100644 check_openvpn/check_openvpn
 create mode 100644 check_openvpn/check_openvpn.cfg
 create mode 100644 check_openvpn/control
 create mode 100644 check_openvpn/copyright

diff --git a/check_openvpn/Makefile b/check_openvpn/Makefile
new file mode 100644
index 0000000..52de70c
--- /dev/null
+++ b/check_openvpn/Makefile
@@ -0,0 +1,4 @@
+#/usr/bin/make -f
+
+include ../common.mk
+
diff --git a/check_openvpn/check_openvpn b/check_openvpn/check_openvpn
new file mode 100644
index 0000000..f91fab7
--- /dev/null
+++ b/check_openvpn/check_openvpn
@@ -0,0 +1,86 @@
+#! /usr/bin/python
+
+# Check if an OpenVPN server runs on a given UDP port.
+#
+# Copyright 2013 Roland Wolters, credativ GmbH
+#
+# Version 20130904
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import sys
+import socket
+import argparse
+import binascii
+
+def ok(msg):
+    print "OK: %s" % msg
+    sys.exit(0)
+
+def critical(msg):
+    print "CRIT: %s" % msg
+    sys.exit(2)
+
+def checkserver(host,port,proto):
+    byte_stream = "\x38\x01\x00\x00\x00\x00\x00\x00\x00"
+
+    if proto:
+        ovpn_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    else:
+        ovpn_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+    ovpn_sock.settimeout(5)
+
+    try:
+        ovpn_sock.connect((host, port))
+        ovpn_sock.sendto(byte_stream, (host, port))
+        data, addr = ovpn_sock.recvfrom(1024) # buffer size is 1024 bytes
+        reply = binascii.hexlify(data)
+        if proto:
+            ok("OpenVPN tcp port reachable.")
+        else:
+            ok("OpenVPN server response (hex): %s" % reply)
+    except socket.timeout:
+        critical("Request timed out")
+        ovpn_sock.close()
+    except (socket.error, Exception):
+        critical("OpenVPN server not responding")
+        ovpn_sock.close()
+
+    ovpn_sock.close()
+    return data
+
+def optionsparser():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-p","--port", help="set port number",
+    type=int, dest="port", default="1194")
+    parser.add_argument("-t","--tcp", help="use tcp instead of udp",
+    action="store_true")
+    parser.add_argument("host", type=str, help="the OpenVPN host name or ip")
+    return parser.parse_args()
+
+def main():
+    arguments = optionsparser()
+
+    data = checkserver(arguments.host,arguments.port,arguments.tcp)
+
+if __name__ == "__main__":
+    main()
+
diff --git a/check_openvpn/check_openvpn.cfg b/check_openvpn/check_openvpn.cfg
new file mode 100644
index 0000000..ac4d1d2
--- /dev/null
+++ b/check_openvpn/check_openvpn.cfg
@@ -0,0 +1,6 @@
+# 'check_openvpn' command definition
+define command {
+        command_name    check_openvpn
+        command_line    /usr/lib/monitoring-plugins/check_openvpn -p '$ARG1$' '$HOSTADDRESS$'
+}
+
diff --git a/check_openvpn/control b/check_openvpn/control
new file mode 100644
index 0000000..25b9192
--- /dev/null
+++ b/check_openvpn/control
@@ -0,0 +1,6 @@
+Homepage: https://raw.github.com/liquidat/nagios-icinga-checks/master/check_openvpn
+Watch: https://raw.github.com/liquidat/nagios-icinga-checks/master/check_openvpn Version\ ([0-9.]+)
+Recommends: python-argparse
+Version: 20130904
+Uploaders: Jan Wagner <waja@cyconet.org>
+Description: plugin to check if an OpenVPN server runs on a given port
diff --git a/check_openvpn/copyright b/check_openvpn/copyright
new file mode 100644
index 0000000..f0461d8
--- /dev/null
+++ b/check_openvpn/copyright
@@ -0,0 +1,21 @@
+Copyright 2013 Roland Wolters, credativ GmbH
+
+License: MIT
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.