writing the values in the variables of lua !!

I am integrating Network Simulator 3 and Lua.

I wrote a Mobile File in Lua script. that file will go on the network, visit certain nodes and collect information from them.

The problem I am facing is that dont know how to keep the information that was collected from the nodes, i.e. I dont know how to save that information I am getting in the variables of Luascript !!!

let me explain , for simplicity reasons, say my MobileAgent.lua script initially contains :

array1 ={"10.10.2.3", "10.10.4.3"}

array2={ ip1="10.2.3.4", ip2="10.3.2.4"}

function update_array1 (t)
(some code )
end

function update_array2 (t)
(some code )
end

So remember, my MobileAgent.lua will travel to some nodes on the network and update the arrays.
say MobileAgent.lua has to visit node1 ,node2 and node3.

so first, the file arrives at node 1.
node1 calls the script and add the element "255.255.255.0" to both arrays.

What I want it for the MobileAgent.lua to look like this :

array1 ={"10.10.2.3", "10.10.4.3" , "255.255.255.0"}

array2={ ip1="10.2.3.4", ip2="10.3.2.4", ip3="255.255.255.0"}

function update_array1 (t)
(some code )
end

function update_array2 (t)
(some code )
end

then, MobileAgent.luav arrives at node 2
node2 calls the updated script and add the element "255.255.255.2" to both arrays.

so MobileAgent.lua should look like this :

array1 ={"10.10.2.3", "10.10.4.3" , "255.255.255.0","255.255.255.2"}

array2={ ip1="10.2.3.4", ip2="10.3.2.4", ip3="255.255.255.0", ip4= "255.255.255.2"}

function update_array1 (t)
(some code )
end

function update_array2 (t)
(some code )
end

I was able to successfully pass the arrays to the C ++ code in the node, an that node updates them, pushes them on the stack, lua takes them from the stack and update the array in memory, but i dont know how to WRITE those on the lua script itself in the right place !

Kindly note that I have more than 2 arrays and some associative arrays in my script. but i gave that example for simplicity reasons.

Any idea what I can do in lua to achieve what I want ? its very urgent !! And nobody has asked this question in ANY of the lua forums, so i couldnt find and help. is it doable in lua in the first place :s ??? thank you .