Get IP Address from MAC Address

[eureka 9]

Hi,

 

Say that I know the MAC address of a specific device I have and I want to retreive the IP Address. How can I retreive it using LUA? 

[samuel 27]

15 minutes ago, AutoFrank said:

@samuel

you could also take a look at the vd code for the network device monitor here 

 

 

It uses labels to display online/ offline status although it is derived a different way....

 

 

i do have this one, but not all devices do have a port, so by arp table is another way to do so.

that's why i was asking

 

 

[petergebruers 1,268]

24 minutes ago, samuel said:

i do have this one, but not all devices do have a port, so by arp table is another way to do so.

that's why i was asking

 

I agree... The ARP approach looks promising for devices that have a permanent IP address (any IP address). It also works if you use DHCP, because devices almost always use the same MAC address. But it still does not work with all phones...

[AutoFrank 372]

47 minutes ago, samuel said:

i do have this one, but not all devices do have a port, so by arp table is another way to do so.

that's why i was asking

 

sorry for confusing the issue @samuel, I wasn't suggesting that you use the solution but you could possibly look through the code to see how VD lables are updated

[samuel 27]

ok understand, will take a look at it.

[samuel 27]

how do i update a table tuble from a json?

 

jN.lastseen = jN.lastseen + 1 

is not working

[petergebruers 1,268]

I guess you did not initialize the field. So your sum would be: nil + 1 and you cannot add to nil. Try this (the if tests. whether the field was initialized) :

 

if jN.lastseen then

  jN.lastseen = jN.lastseen + 1

else

  jN.lastseen = 1

end

 

If that does not help, please post a bit of code that demonstrates the issue.