LogicMachine as SNMP probe. Access to MIB info stored in Logicmachine

[kike]

Hi everyone, 

I would like to use a LogicMachine as a new "probe" in the network. 

The NetWork Management System of a building needs to read some info from the state of the instalation managed by the LogicMachine.

I need to implement this two issues:

1-. Create an accesible MIB within the LogicMAchine with a table of OIDs with the alerts and Info that will be monitorized over SNMP.

2-. Be able to send TRAPS to the IP of the SNMP Manager

I've been looking for info in this forum and it looks like there is a manual or info in  http://luasnmp.luaforge.net/

This link is no longer avalable. 

So my Question is: "Is It possible to achive this 2 issues with a LogicMAchine and LUAScripting? ... and if so ... Is There a manual or example to start with?"

Thank you very much in advance!!!

Kike

[Daniel]

Have a look here
https://forum.logicmachine.net/showthread.php?tid=1573

[admin]

Sending traps is not implemented at the moment. SNMP agent (experimental) can be executed via a script. It allows mapping objects to OIDs.

1. Install the latest package via system config:
https://dl.openrb.com/pkg/libnetsnmp_5.8-1_imx6.ipk
https://dl.openrb.com/lm-21-imx6/pkg/lua...5_imx6.ipk

2. Create a resident script with sleep time set to 5. Edit conf variable as needed. In this example remote host is 192.168.1.230, base OID is .1.3.6.1.4.1.53864.1.1
Note that disabling the script does not stop the snmp daemon.

Code:

123456789101112131415

local conf = [[ rocommunity public 192.168.1.230 rwcommunity private 192.168.1.230 pass .1.3.6.1.4.1.53864.1.1 /usr/bin/lua /tmp/snmp.lua ]] local script = [[ require('user.snmphandler') ]] io.writefile('/tmp/snmpd.conf', conf) io.writefile('/tmp/snmp.lua', script) os.execute('killall snmpd; snmpd -c /tmp/snmpd.conf -f')

3. Create user library named "snmphandler". Edit the oids table and supply required oids and group address pairs. Base OID must match the configured OID in the snmpd conf. Make sure that all mapped group addresses exist.

Code:

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local oids = {   { oid = '.1.3.6.1.4.1.53864.1.1.1.0', addr = '1/1/1' },   { oid = '.1.3.6.1.4.1.53864.1.1.2.1.2.1', addr = '1/1/2' },   { oid = '.1.3.6.1.4.1.53864.1.1.2.1.3.1', addr = '1/1/4' },   { oid = '.1.3.6.1.4.1.53864.1.1.3.0', addr = '1/1/5' },   { oid = '.1.3.6.1.4.1.53864.1.1.4.0', addr = '1/1/6' },   { oid = '.1.3.6.1.4.1.53864.1.1.5.0', addr = '1/1/7' },   { oid = '.1.3.6.1.4.1.53864.1.1.6.0', addr = '1/1/8' }, } require('genohm-scada') db = require('dbenv').new() local req, oid = assert(arg[ 1 ]), assert(arg[ 2 ]) local function get(item)   if not item then     return   end   local obj = grp.find(item.addr)   if not obj then     return   end   local value = obj.value   local objtype = 'integer'   if type(value) == 'boolean' then     value = value and 1 or 0   elseif type(value) == 'number' then     value = math.round(value)   elseif type(value) ~= 'string' then     value = require('json').encode(value)   end   print(item.oid)   print(type(value) == 'number' and 'integer' or 'string')   print(value) end -- get if req == '-g' then   for i, item in ipairs(oids) do     if item.oid == oid then       get(item)       break     end   end -- next elseif req == '-n' then   for i, item in ipairs(oids) do     if item.oid == oid then       get(oids[ i + 1 ])       break     elseif item.oid:find(oid, 1, true) == 1 then       get(item)       break     end   end -- set elseif req == '-s' then   local objtype, value = assert(arg[ 3 ]), assert(arg[ 4 ])   if objtype ~= 'string' then     value = tonumber(value)   end   for i, item in ipairs(oids) do     if item.oid == oid then       grp.write(item.addr, value)     end   end end

[kike]

Have a look here
https://forum.logicmachine.net/showthread.php?tid=1573

I already checked this thread, but in this case the issue is about the LogicMachine "asking" and "dealing" with an SNMP Probe (agent) trhough an IP. 

In fact, in the same thread Erwin aks about the same issue:  

qoute: "This sample is a client, can we also use it as server?"


I tried to follow the thread to find out the solution ... but with no success! unless the universal solution provided by the Admin user works also as the own MIB!!

I need that solution but with inverse sense of comunication X)

Thanks!!!

---

Sending traps is not implemented at the moment. SNMP agent (experimental) can be executed via a script. It allows mapping objects to OIDs.

1. Install the latest package via system config:
https://dl.openrb.com/pkg/libnetsnmp_5.8-1_imx6.ipk
https://dl.openrb.com/lm-21-imx6/pkg/lua...5_imx6.ipk

2. Create a resident script with sleep time set to 5. Edit conf variable as needed. In this example remote host is 192.168.1.230, base OID is .1.3.6.1.4.1.53864.1.1
Note that disabling the script does not stop the snmp daemon.

Code:

123456789101112131415

local conf = [[ rocommunity public 192.168.1.230 rwcommunity private 192.168.1.230 pass .1.3.6.1.4.1.53864.1.1 /usr/bin/lua /tmp/snmp.lua ]] local script = [[ require('user.snmphandler') ]] io.writefile('/tmp/snmpd.conf', conf) io.writefile('/tmp/snmp.lua', script) os.execute('killall snmpd; snmpd -c /tmp/snmpd.conf -f')

3. Create user library named "snmphandler". Edit the oids table and supply required oids and group address pairs. Base OID must match the configured OID in the snmpd conf. Make sure that all mapped group addresses exist.

Code:

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273

local oids = {   { oid = '.1.3.6.1.4.1.53864.1.1.1.0', addr = '1/1/1' },   { oid = '.1.3.6.1.4.1.53864.1.1.2.1.2.1', addr = '1/1/2' },   { oid = '.1.3.6.1.4.1.53864.1.1.2.1.3.1', addr = '1/1/4' },   { oid = '.1.3.6.1.4.1.53864.1.1.3.0', addr = '1/1/5' },   { oid = '.1.3.6.1.4.1.53864.1.1.4.0', addr = '1/1/6' },   { oid = '.1.3.6.1.4.1.53864.1.1.5.0', addr = '1/1/7' },   { oid = '.1.3.6.1.4.1.53864.1.1.6.0', addr = '1/1/8' }, } require('genohm-scada') db = require('dbenv').new() local req, oid = assert(arg[ 1 ]), assert(arg[ 2 ]) local function get(item)   if not item then     return   end   local obj = grp.find(item.addr)   if not obj then     return   end   local value = obj.value   local objtype = 'integer'   if type(value) == 'boolean' then     value = value and 1 or 0   elseif type(value) == 'number' then     value = math.round(value)   elseif type(value) ~= 'string' then     value = require('json').encode(value)   end   print(item.oid)   print(type(value) == 'number' and 'integer' or 'string')   print(value) end -- get if req == '-g' then   for i, item in ipairs(oids) do     if item.oid == oid then       get(item)       break     end   end -- next elseif req == '-n' then   for i, item in ipairs(oids) do     if item.oid == oid then       get(oids[ i + 1 ])       break     elseif item.oid:find(oid, 1, true) == 1 then       get(item)       break     end   end -- set elseif req == '-s' then   local objtype, value = assert(arg[ 3 ]), assert(arg[ 4 ])   if objtype ~= 'string' then     value = tonumber(value)   end   for i, item in ipairs(oids) do     if item.oid == oid then       grp.write(item.addr, value)     end   end end

Thanks!!! I will try this solucion! thank you for the quick answer!!

[kike]

It's working!!One more question: with this example it allow querys from one single IP. Is there a setting that allows querys from any ip inthe LAN?This is already OK to me! but I would like to know!Thank you again!!

Sending traps is not implemented at the moment. SNMP agent (experimental) can be executed via a script. It allows mapping objects to OIDs.

1. Install the latest package via system config:
https://dl.openrb.com/pkg/libnetsnmp_5.8-1_imx6.ipk
https://dl.openrb.com/lm-21-imx6/pkg/lua...5_imx6.ipk

2. Create a resident script with sleep time set to 5. Edit conf variable as needed. In this example remote host is 192.168.1.230, base OID is .1.3.6.1.4.1.53864.1.1
Note that disabling the script does not stop the snmp daemon.

Code:

123456789101112131415

local conf = [[ rocommunity public 192.168.1.230 rwcommunity private 192.168.1.230 pass .1.3.6.1.4.1.53864.1.1 /usr/bin/lua /tmp/snmp.lua ]] local script = [[ require('user.snmphandler') ]] io.writefile('/tmp/snmpd.conf', conf) io.writefile('/tmp/snmp.lua', script) os.execute('killall snmpd; snmpd -c /tmp/snmpd.conf -f')

3. Create user library named "snmphandler". Edit the oids table and supply required oids and group address pairs. Base OID must match the configured OID in the snmpd conf. Make sure that all mapped group addresses exist.

Code:

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273

local oids = {   { oid = '.1.3.6.1.4.1.53864.1.1.1.0', addr = '1/1/1' },   { oid = '.1.3.6.1.4.1.53864.1.1.2.1.2.1', addr = '1/1/2' },   { oid = '.1.3.6.1.4.1.53864.1.1.2.1.3.1', addr = '1/1/4' },   { oid = '.1.3.6.1.4.1.53864.1.1.3.0', addr = '1/1/5' },   { oid = '.1.3.6.1.4.1.53864.1.1.4.0', addr = '1/1/6' },   { oid = '.1.3.6.1.4.1.53864.1.1.5.0', addr = '1/1/7' },   { oid = '.1.3.6.1.4.1.53864.1.1.6.0', addr = '1/1/8' }, } require('genohm-scada') db = require('dbenv').new() local req, oid = assert(arg[ 1 ]), assert(arg[ 2 ]) local function get(item)   if not item then     return   end   local obj = grp.find(item.addr)   if not obj then     return   end   local value = obj.value   local objtype = 'integer'   if type(value) == 'boolean' then     value = value and 1 or 0   elseif type(value) == 'number' then     value = math.round(value)   elseif type(value) ~= 'string' then     value = require('json').encode(value)   end   print(item.oid)   print(type(value) == 'number' and 'integer' or 'string')   print(value) end -- get if req == '-g' then   for i, item in ipairs(oids) do     if item.oid == oid then       get(item)       break     end   end -- next elseif req == '-n' then   for i, item in ipairs(oids) do     if item.oid == oid then       get(oids[ i + 1 ])       break     elseif item.oid:find(oid, 1, true) == 1 then       get(item)       break     end   end -- set elseif req == '-s' then   local objtype, value = assert(arg[ 3 ]), assert(arg[ 4 ])   if objtype ~= 'string' then     value = tonumber(value)   end   for i, item in ipairs(oids) do     if item.oid == oid then       grp.write(item.addr, value)     end   end end

[admin]

You can allows access for to the whole subnet like this:

Code:

12

rocommunity public 192.168.1.0/24 rwcommunity private 192.168.1.0/24

[kike]

You can allows access for to the whole subnet like this:

Code:

12

rocommunity public 192.168.1.0/24 rwcommunity private 192.168.1.0/24