Info Catalog elisp: Network Processes elisp: Low-Level Network elisp: Network Feature Testing

elisp: Network Options

 
 36.17.2 Network Options
 -----------------------
 
 The following network options can be specified when you create a network
 process.  Except for ‘:reuseaddr’, you can also set or modify these
 options later, using ‘set-network-process-option’.
 
    For a server process, the options specified with
 ‘make-network-process’ are not inherited by the client connections, so
 you will need to set the necessary options for each child connection as
 it is created.
 
 :bindtodevice DEVICE-NAME
      If DEVICE-NAME is a non-empty string identifying a network
      interface name (see ‘network-interface-list’), only handle packets
      received on that interface.  If DEVICE-NAME is ‘nil’ (the default),
      handle packets received on any interface.
 
      Using this option may require special privileges on some systems.
 
 :broadcast BROADCAST-FLAG
      If BROADCAST-FLAG is non-‘nil’ for a datagram process, the process
      will receive datagram packet sent to a broadcast address, and be
      able to send packets to a broadcast address.  This is ignored for a
      stream connection.
 
 :dontroute DONTROUTE-FLAG
      If DONTROUTE-FLAG is non-‘nil’, the process can only send to hosts
      on the same network as the local host.
 
 :keepalive KEEPALIVE-FLAG
      If KEEPALIVE-FLAG is non-‘nil’ for a stream connection, enable
      exchange of low-level keep-alive messages.
 
 :linger LINGER-ARG
      If LINGER-ARG is non-‘nil’, wait for successful transmission of all
      queued packets on the connection before it is deleted (see
      ‘delete-process’).  If LINGER-ARG is an integer, it specifies the
      maximum time in seconds to wait for queued packets to be sent
      before closing the connection.  The default is ‘nil’, which means
      to discard unsent queued packets when the process is deleted.
 
 :oobinline OOBINLINE-FLAG
      If OOBINLINE-FLAG is non-‘nil’ for a stream connection, receive
      out-of-band data in the normal data stream.  Otherwise, ignore
      out-of-band data.
 
 :priority PRIORITY
      Set the priority for packets sent on this connection to the integer
      PRIORITY.  The interpretation of this number is protocol specific;
      such as setting the TOS (type of service) field on IP packets sent
      on this connection.  It may also have system dependent effects,
      such as selecting a specific output queue on the network interface.
 
 :reuseaddr REUSEADDR-FLAG
      If REUSEADDR-FLAG is non-‘nil’ (the default) for a stream server
      process, allow this server to reuse a specific port number (see
      ‘:service’), unless another process on this host is already
      listening on that port.  If REUSEADDR-FLAG is ‘nil’, there may be a
      period of time after the last use of that port (by any process on
      the host) where it is not possible to make a new server on that
      port.
 
  -- Function: set-network-process-option process option value &optional
           no-error
      This function sets or modifies a network option for network process
      PROCESS.  The accepted options and values are as for
      ‘make-network-process’.  If NO-ERROR is non-‘nil’, this function
      returns ‘nil’ instead of signaling an error if OPTION is not a
      supported option.  If the function successfully completes, it
      returns ‘t’.
 
      The current setting of an option is available via the
      ‘process-contact’ function.
 

Info Catalog elisp: Network Processes elisp: Low-Level Network elisp: Network Feature Testing