socket = require("socket") -- import lib

-- define host and port
host ="*"
port = 8080

-- create socket and bind to an available port
server = assert(socket.bind(host, port))

-- get local port number and IP
ip, port = server:getsockname()

totalclient = 0 -- store the total connections
clients = {} -- e.g. clients[1] = 0xSocketAddress
clientnames = {} -- e.g. clientnames[1] ="john"

-- start the loop to listening connection
while true do

  -- new client connected, settimeout to not block connetcion
  server:settimeout(0.01)
  local client, err = server:accept();

  -- print the info of new client and add new client to the table
  if (not err) then
    clientname = client:receive()
    totalclient = totalclient + 1
    clients[totalclient] = client
    clientnames[totalclient] = clientname
    print(">>"..clientname.." connected from" .. tostring(client:getsockname()) .." at" ..os.date("%m/%d/%Y %H:%M:%S"))
  end

  -- loop through the client table
  for i = 1, totalclient do
    -- if there is client, listen to that client
    if (clients[i] ~= nil) then
      clients[totalclient]:settimeout(0.01) -- prevent blocking
      clientmessage, err = clients[i]:receive() -- accept data from client

      -- check if there is something sent to server, and no error occured
      if (err == nil and clientmessage ~= nil) then

        -- loop through the list of client to send broadcast message
        else
          for j = 1, totalclient do
            -- check not to send broadcast to the speaker
            if clients[i] ~= clients[j] then
              clients[j]:send(tostring("["..clientnames[i]).."]:" ..clientmessage.."\
\
")
            end
          end--for
          logdbmessage(clientnames[i], clientmessage)
        end--if


      end--if

    end--if
  end--for

end--while