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