#!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# tails. You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

aironet_default_strength_levels = (-25, -20)
aironet_default_quality_levels = (40, 35)

# Note: this check uses three different items in order
# to distinguish three independent aspects. This should rather
# be converted to subchecks, because:
# - Subchecks can ship separate PNP templates.
# - Perf-O-Meters need separate checks, as well.
# - WATO configuration is done on a per-check basis and
#   the parameters for the three aspects are not of the same
#   meaing and type


def inventory_aironet_clients(info):
    if len(info) > 0:
        return [("strength", "aironet_default_strength_levels"),
                ("quality", "aironet_default_quality_levels"),
                ("clients", None)]

def check_aironet_clients(item, params, info):
    info = [ line for line in info if line[0] != '' ]

    if len(info) == 0:
        return (0, "No clients currently logged in")

    if item == "clients":
        return (0, "%d clients currently logged in" % len(info),
                [("clients", len(info), None, None, 0, None)])

    # item = "quality" or "strength"
    if item == "quality":
        index = 1
        mmin = 0
        mmax = 100
        unit = "%"
        neg = 1
    else:
        index = 0
        mmin = None
        mmax = 0
        unit = "dB"
        neg = -1

    avg = sum([saveint(line[index]) for line in info]) / float(len(info))
    warn, crit = params
    perfdata = [(item, avg, warn, crit, mmin, mmax)]
    infotxt = "signal %s at %.1f%s (warn/crit at %s%s/%s%s)" % \
        (item, avg, unit, warn, unit, crit, unit)

    if neg * avg <= neg * crit:
        return (2, infotxt, perfdata)
    elif neg * avg <= neg * warn:
        return (1, infotxt, perfdata)
    else:
        return (0, infotxt, perfdata)

check_info["aironet_clients"] = {
    'check_function':          check_aironet_clients,
    'inventory_function':      inventory_aironet_clients,
    'service_description':     'Average client signal %s',
    'has_perfdata':            True,
    'snmp_info':               ('.1.3.6.1.4.1.9.9.273.1.3.1.1', [
                                    3, # CISCO-DOT11-ASSOCIATION-MIB::cDot11ClientSignalStrength
                                    4, # CISCO-DOT11-ASSOCIATION-MIB::cDot11ClientSigQuality
                                ]),
    'snmp_scan_function':      \
          lambda oid: oid(".1.3.6.1.2.1.1.2.0") in [
                               ".1.3.6.1.4.1.9.1.525",
                               ".1.3.6.1.4.1.9.1.618",
                               ".1.3.6.1.4.1.9.1.685",
                               ".1.3.6.1.4.1.9.1.758",
                               ".1.3.6.1.4.1.9.1.1034",
                               ".1.3.6.1.4.1.9.1.1247",
                           ],
}
