Info Catalog elisp: Network Servers elisp: Processes elisp: Low-Level Network

elisp: Datagrams

 
 36.16 Datagrams
 ===============
 
 A “datagram” connection communicates with individual packets rather than
 streams of data.  Each call to ‘process-send’ sends one datagram packet
 (Input to Processes), and each datagram received results in one
 call to the filter function.
 
    The datagram connection doesn’t have to talk with the same remote
 peer all the time.  It has a “remote peer address” which specifies where
 to send datagrams to.  Each time an incoming datagram is passed to the
 filter function, the peer address is set to the address that datagram
 came from; that way, if the filter function sends a datagram, it will go
 back to that place.  You can specify the remote peer address when you
 create the datagram connection using the ‘:remote’ keyword.  You can
 change it later on by calling ‘set-process-datagram-address’.
 
  -- Function: process-datagram-address process
      If PROCESS is a datagram connection or server, this function
      returns its remote peer address.
 
  -- Function: set-process-datagram-address process address
      If PROCESS is a datagram connection or server, this function sets
      its remote peer address to ADDRESS.
 

Info Catalog elisp: Network Servers elisp: Processes elisp: Low-Level Network