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

ACCEPT

This function will accept incoming TCP or UDP connections and assign a channel for the connection.
SERVERSOCKET
 must be used to set up the listening socket before
ACCEPT
 can be used.
Format
ACCEPT (SERVER, CLIENT_INFO$)
Parameters
  • SERVER
     = the handle returned by the
    SERVERSOCKET
     call.
  • CLIENT_INFO$
     = string variable will have the connecting client’s IP address and port separated by a space when using UDP.
Returns
The channel number to use to communicate with the client.
Example
See the examples for TCP Server and UDP Server.
Comments
It is best to poll this function at regular intervals. When there is no connection waiting, this function will trigger an error. Follow this function with the
ON ERROR
 command to divert to a section of code that handles an unsuccessful connection.
ACCEPT
 can be called before closing a previous connection. This allows for processing multiple incoming streams of data. There are limits on the number of simultaneous incoming connections based on the print server model on the printer.
Connection closure can be detected when any input or output command to the port triggers an error. These commands should be followed by an
ON ERROR
 statement to send the program into a recovery state and to shutdown the connection cleanly.