TCP over SSL

[admin]

It's possible, but you cannot run it without a certificate. You can reuse web-server's self-signed certificate though. Here's a short example:

Code:

if not tcpserver then
  require('copas')

  sslparams = {
    mode = 'server',
    protocol = 'tlsv12',
    key = '/etc/nginx_sha256.key',
    certificate = '/etc/nginx_sha256.crt',
    options = 'all',
  }

  -- connection handler
  function connhandler(sock)
    local ip, port = sock:getpeername()

    sock = copas.wrap(sock, sslparams)
    sock:dohandshake()

    alert('[server] connection from %s:%d', ip, port)

    -- main reader loop
    while true do
      -- wait for single line of data (until \n, \r is ignored)
      local data, err = copas.receive(sock, '*l')

      -- error while receiving
      if err then
        alert('[server] closed connection from %s:%d', ip, port)
        return
      end

      -- handle data frame
      if data == 'HELLO' then
        sock:send('HELLO TO YOU\r\n')
        sock:close()
      end
    end
  end

  -- bind to port 12345
  tcpserver = socket.bind('*', 12345)

  -- error while binding, try again later
  if not tcpserver then
    os.sleep(5)
    error('[server] error: cannot bind')
  end

  -- set server connection handler
  copas.addserver(tcpserver, connhandler)
end

copas.step(1)