tree de138b59f02a0d4d1a4a89dd59f125154eac3692
parent 5e21131c8dd37a536ec7df968d602c2c85580c39
author Harald Welte <laforge@gnumonks.org> 1408660131 +0200
committer Harald Welte <laforge@gnumonks.org> 1408891974 +0200

libctrl: Add support for 'deferred control commands'

Sometimes a control interface command cannot be processed
and responded immediately, but we need to process it asynchronously.

In order to support this, we introduce the 'ctrl_cmd_def', which
represents such a deferred command.  It is created by the service
implementing the command using ctrl_cmd_def_make(), and a response is
later sent using ctrl_cmd_def_send().

ctrl_cmd_def_is_zombie() must be called to handle the case where
the control connection has disconnected/died between receiving the
command and sending the response.