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106 lines
2.5 KiB
Lua
106 lines
2.5 KiB
Lua
--
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-- (C) 2020-24 - ntop.org
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--
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-- This file is used to report SNMP interface information sent by nprobe with --snmp-mappings
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-- ################################################################################
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local snmp_mappings = {}
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local _localcache = {}
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local _prefix = "cachedexporters."
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local _postfix = ".ifnames"
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-- ################################################################################
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function snmp_mappings.get_all_exporters()
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local key = _prefix.."*".._postfix
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local rsp = ntop.getKeysCache(key)
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local rc = {}
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if(rsp ~= nil) then
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local len = string.len(_prefix) + 1
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local postfix_len = string.len(_postfix)
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for k,v in pairs(rsp) do
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local len1
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k = string.sub(k, len)
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len1 = string.len(k) - postfix_len
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k = string.sub(k, 1, len1)
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table.insert(rc, k)
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end
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end
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return(rc)
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end
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-- ################################################################################
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local function _cache_device(snmp_device_ip)
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if(_localcache[snmp_device_ip] == nil) then
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local key = _prefix..snmp_device_ip.._postfix
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local rsp = ntop.getCache(key)
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if((rsp ~= nil) and (rsp ~= "")) then
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local json = require "dkjson"
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_localcache[snmp_device_ip] = json.decode(rsp) or {}
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else
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_localcache[snmp_device_ip] = {}
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end
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end
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end
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-- ################################################################################
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function snmp_mappings.get_iface_names(snmp_device_ip)
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local ports
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_cache_device(snmp_device_ip)
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ports = _localcache[snmp_device_ip]
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return ports
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end
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-- ################################################################################
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function snmp_mappings.get_iface_name(snmp_device_ip, if_idx)
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local ports
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_cache_device(snmp_device_ip)
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ports = _localcache[snmp_device_ip]
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if_idx = if_idx .. "" -- to string
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if((ports[if_idx] ~= nil) and (ports[if_idx].name ~= nil)) then
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return(ports[if_idx].name)
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end
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return nil
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end
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-- ################################################################################
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function snmp_mappings.get_iface_idx(snmp_device_ip, if_name)
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local ports
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_cache_device(snmp_device_ip)
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ports = _localcache[snmp_device_ip]
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for idx, info in pairs(ports) do
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if info.name and info.name == if_name then
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return idx
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end
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end
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return nil
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end
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-- ################################################################################
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return snmp_mappings
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