#!/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-
# ails.  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.

# Example Agent Output:
# GENUA-MIB:

# .1.3.6.1.4.1.3137.2.1.2.1.1.9 = INTEGER: 9
# .1.3.6.1.4.1.3137.2.1.2.1.1.10 = INTEGER: 10
# .1.3.6.1.4.1.3137.2.1.2.1.2.9 = STRING: "carp0"
# .1.3.6.1.4.1.3137.2.1.2.1.2.10 = STRING: "carp1"
# .1.3.6.1.4.1.3137.2.1.2.1.3.9 = INTEGER: 5
# .1.3.6.1.4.1.3137.2.1.2.1.3.10 = INTEGER: 5
# .1.3.6.1.4.1.3137.2.1.2.1.4.9 = INTEGER: 2
# .1.3.6.1.4.1.3137.2.1.2.1.4.10 = INTEGER: 2
# .1.3.6.1.4.1.3137.2.1.2.1.7.9 = INTEGER: 2
# .1.3.6.1.4.1.3137.2.1.2.1.7.10 = INTEGER: 2


def inventory_genua_state(info):
    # remove empty elements due to two alternative enterprise ids in snmp_info
    info = filter(None, info)
    if info[0]:
        numifs = 0
        for ifIndex, ifName, ifType, ifLinkState, ifCarpState in info[0]:
            if ifCarpState in [ "0", "1", "2" ]:
                numifs += 1
        # inventorize only if we find at least two carp interfaces
        if numifs > 1:
            return [(None, None)]
    return None

def genua_state_str(st):
    names = {
        '0' : 'init',
        '1' : 'backup',
        '2' : 'master',
            }
    return names.get(st, st)

def check_genua_state(item, _no_params, info):

    # remove empty elements due to two alternative enterprise ids in snmp_info
    info = filter(None, info)
    if not info[0]:
        return(3, "Invalid Output from Agent")

    state = 0
    carp_info = []

    for ifIndex, ifName, ifType, ifLinkState, ifCarpState in info[0]:
        if ifType == "6":
            carp_info.append((ifIndex, ifName, ifType, ifLinkState, ifCarpState))

    # critical if the carp interfaces dont have the same state
    carp_states = [ 0, 0, 0 ]
    for i in range (0, len(carp_info)):
        carp_states[int(carp_info[i][4])] += 1
        if carp_info[0][4] != carp_info[i][4]:
            state = 2

    output = "Number of carp IFs in states "
    for i in ('0', '1', '2'):
        output += genua_state_str(i)
        output += ":%d " % carp_states[int(i)]

    return(state, output)

check_info['genua_state_correlation'] = {
    "inventory_function" : inventory_genua_state,
    "check_function"     : check_genua_state,
    "service_description": "Carp Correlation",
    "has_perfdata"       : False,
    "snmp_info"          : [( ".1.3.6.1.4.1.3717.2.1.2",[
                                "1.1", # "ifIndex"
                                "1.2", # "ifName"
                                "1.3", # "ifType"
                                "1.4", # "ifLinkState"
                                "1.7", # "ifCarpState"
                          ]),
                          ( ".1.3.6.1.4.1.3137.2.1.2",[
                                "1.1", # "ifIndex"
                                "1.2", # "ifName"
                                "1.3", # "ifType"
                                "1.4", # "ifLinkState"
                                "1.7", # "ifCarpState"
                          ])],
    "snmp_scan_function" : lambda oid: "genuscreen" in oid(".1.3.6.1.2.1.1.1.0").lower()
    #"snmp_scan_function" : lambda oid: oid(".1.3.6.1.4.1.3717.2.1.2.1.7") != None
}
