1. ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
  2. ZBI Commands
  3. SERVERSOCKET
  • ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
SERVERSOCKET

SERVERSOCKET

This function opens a listening socket for incoming UDP packets or TCP connections. It must be used in conjunction with the
ACCEPT
 function.
Format
SERVERSOCKET (TYPE$,PORT)
Parameters
TYPE$
 = listens for any of the following communication protocols:
  • "TCP"
     = TCP – PORT parameter is ignored. The current port will be used.
  • "TCPX"
     = TCP – any open port
  • "UDP"
     = UDP – any open port
Returns
NUMERIC
 = returns the handle of the server upon success.
Example
See the examples for TCP Server and UDP Server.
Comments
When using
TCPX
, care needs to be taken not to use a port that is already open on the printer. No error message will be returned until the
ACCEPT
 function is called.