redrelay

args = {...}
if #args < 2 or tonumber(args[1]) == nil or tonumber(args[2]) == nil then
    print("Usage:")
    print("redrelay <id> <id>")
    return
else
    local modemFound = false
    for _,side in ipairs(rs.getSides()) do
        if peripheral.getType(side) == "modem" then
            rednet.open(side)
            modemFound = true
            break
        end
    end
    if not modemFound then
        print("No modem found!")
        return
    end
end

local logTable = {}
local id1, id2 = tonumber(args[1]), tonumber(args[2])

while true do
    event = {os.pullEvent()}
    if event[1] == "rednet_message" then
        if event[2] == id1 or event[2] == id2 then
            print(event[2]..": "..event[3])
            table.insert(logTable, event[2]..": "..event[3])
            rednet.send(event[2] == id1 and id2 or id1, event[3])
        end
    elseif event[1] == "char" and event[2] == "q" then
        handle = io.open("/rednet_log", "w")
        if handle then
            for i=1, #logTable do
                handle:write(logTable[i].."\n")
            end
            handle:close()
        end
        return
    end
end