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
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.
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.
nilfor 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.
nil, the process can only send to hosts on the same network as the local host.
nilfor a stream connection, enable exchange of low-level keep-alive messages.
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.
nilfor a stream connection, receive out-of-band data in the normal data stream. Otherwise, ignore out-of-band data.
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.
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
nilinstead of signaling an error if option is not a supported option. If the function successfully completes, it returns
The current setting of an option is available via the