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176 lines
6.3 KiB
176 lines
6.3 KiB
--
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-- This file is part of SmartSNMP
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-- Copyright (C) 2014, Credo Semiconductor Inc.
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License along
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-- with this program; if not, write to the Free Software Foundation, Inc.,
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-- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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--
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local mib = require "smartsnmp"
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local uci = require "uci"
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-- System config
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local context = uci.cursor("/etc/config", "/tmp/.uci")
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-- scalar index
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local sysDesc = 1
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local sysObjectID = 2
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local sysUpTime = 3
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local sysContact = 4
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local sysName = 5
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local sysLocation = 6
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local sysServices = 7
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local sysORLastChange = 8
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-- table index
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local sysORTable = 9
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-- entry index
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local sysOREntry = 1
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-- list index
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local sysORIndex = 1
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local sysORID = 2
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local sysORDesc = 3
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local sysORUpTime = 4
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local startup_time = 0
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local or_last_changed_time = 0
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local function mib_system_startup(time)
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startup_time = time
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or_last_changed_time = time
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end
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mib_system_startup(os.time())
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local sysGroup = {}
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local or_oid_cache = {}
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local or_index_cache = {}
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local or_table_cache = {}
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local or_table_reg = function (oid, desc)
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local row = {}
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row['oid'] = {}
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for i in string.gmatch(oid, "%d") do
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table.insert(row['oid'], tonumber(i))
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end
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row['desc'] = desc
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row['uptime'] = os.time()
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table.insert(or_table_cache, row)
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or_last_changed_time = os.time()
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or_oid_cache[oid] = #or_table_cache
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or_index_cache = {}
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for i in ipairs(or_table_cache) do
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table.insert(or_index_cache, i)
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end
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end
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local or_table_unreg = function (oid)
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local or_idx = or_oid_cache[oid]
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if or_table_cache[or_idx] ~= nil then
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table.remove(or_table_cache, or_idx)
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or_last_changed_time = os.time()
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or_index_cache = {}
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for i in ipairs(or_table_cache) do
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table.insert(or_index_cache, i)
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end
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end
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end
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local last_load_time = os.time()
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local function need_to_reload()
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if os.difftime(os.time(), last_load_time) < 3 then
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return false
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else
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last_load_time = os.time()
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return true
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end
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end
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local function load_config()
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if need_to_reload() == true then
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context:load("smartsnmpd")
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end
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end
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context:load("smartsnmpd")
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local sysMethods = {
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["or_table_reg"] = or_table_reg,
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["or_table_unreg"] = or_table_unreg
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}
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mib.module_method_register(sysMethods)
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sysGroup = {
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rocommunity = 'public',
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[sysDesc] = mib.ConstString(function () load_config() return mib.sh_call("uname -a") end),
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[sysObjectID] = mib.ConstOid(function ()
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load_config()
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local oid
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local objectid
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context:foreach("smartsnmpd", "smartsnmpd", function (s)
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objectid = s.objectid
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end)
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if objectid ~= nil then
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oid = {}
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for i in string.gmatch(objectid, "%d+") do
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table.insert(oid, tonumber(i))
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end
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end
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return oid
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end),
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[sysUpTime] = mib.ConstTimeticks(function () load_config() return os.difftime(os.time(), startup_time) * 100 end),
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[sysContact] = mib.ConstString(function ()
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load_config()
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local contact
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context:foreach("smartsnmpd", "smartsnmpd", function (s)
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contact = s.contact
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end)
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return contact
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end),
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[sysName] = mib.ConstString(function () load_config() return mib.sh_call("uname -n") end),
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[sysLocation] = mib.ConstString(function ()
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load_config()
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local location
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context:foreach("smartsnmpd", "smartsnmpd", function (s)
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location = s.location
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end)
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return location
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end),
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[sysServices] = mib.ConstInt(function ()
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load_config()
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local services
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context:foreach("smartsnmpd", "smartsnmpd", function (s)
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services = tonumber(s.services)
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end)
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return services
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end),
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[sysORLastChange] = mib.ConstTimeticks(function () load_config() return os.difftime(os.time(), or_last_changed_time) * 100 end),
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[sysORTable] = {
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[sysOREntry] = {
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[sysORIndex] = mib.UnaIndex(function () load_config() return or_index_cache end),
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[sysORID] = mib.ConstOid(function (i) load_config() return or_table_cache[i].oid end),
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[sysORDesc] = mib.ConstString(function (i) load_config() return or_table_cache[i].desc end),
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[sysORUpTime] = mib.ConstTimeticks(function (i) load_config() return os.difftime(os.time(), or_table_cache[i].uptime) * 100 end),
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}
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}
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}
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return sysGroup
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