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/* callback.c
The dhcpctl callback object. */
/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1999-2003 by Internet Software Consortium
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Internet Systems Consortium, Inc.
* 950 Charter Street
* Redwood City, CA 94063
* <info@isc.org>
* http://www.isc.org/
*
* This software has been written for Internet Systems Consortium
* by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
* To learn more about Internet Systems Consortium, see
* ``http://www.isc.org/''. To learn more about Vixie Enterprises,
* see ``http://www.vix.com''. To learn more about Nominum, Inc., see
* ``http://www.nominum.com''.
*/
#ifndef lint
static char copyright[] =
"$Id: callback.c,v 1.5.2.2 2004/06/10 17:59:23 dhankins Exp $ Copyright (c) 2004 Internet Systems Consortium. All rights reserved.\n";
#endif /* not lint */
#include <omapip/omapip_p.h>
#include "dhcpctl.h"
/* dhcpctl_set_callback
synchronous, with asynchronous aftereffect
handle is some object upon which some kind of process has been
started - e.g., an open, an update or a refresh.
data is an anonymous pointer containing some information that
the callback will use to figure out what event completed.
return value of 0 means callback was successfully set, a nonzero
status code is returned otherwise.
Upon completion of whatever task is in process, the callback
will be passed the handle to the object, a status code
indicating what happened, and the anonymous pointer passed to */
dhcpctl_status dhcpctl_set_callback (dhcpctl_handle h, void *data,
void (*func) (dhcpctl_handle,
dhcpctl_status, void *))
{
dhcpctl_callback_object_t *callback;
omapi_object_t *inner;
isc_result_t status;
callback = dmalloc (sizeof *callback, MDL);
if (!callback)
return ISC_R_NOMEMORY;
/* Tie the callback object to the innermost object in the chain. */
for (inner = h; inner -> inner; inner = inner -> inner)
;
omapi_object_reference (&inner -> inner,
(omapi_object_t *)callback, MDL);
omapi_object_reference ((omapi_object_t **)&callback -> outer,
inner, MDL);
/* Save the actual handle pointer we were passed for the callback. */
omapi_object_reference (&callback -> object, h, MDL);
callback -> data = data;
callback -> callback = func;
return ISC_R_SUCCESS;
}
/* Callback methods (not meant to be called directly) */
isc_result_t dhcpctl_callback_set_value (omapi_object_t *h,
omapi_object_t *id,
omapi_data_string_t *name,
omapi_typed_data_t *value)
{
if (h -> type != dhcpctl_callback_type)
return ISC_R_INVALIDARG;
if (h -> inner && h -> inner -> type -> set_value)
return (*(h -> inner -> type -> set_value))
(h -> inner, id, name, value);
return ISC_R_NOTFOUND;
}
isc_result_t dhcpctl_callback_get_value (omapi_object_t *h,
omapi_object_t *id,
omapi_data_string_t *name,
omapi_value_t **value)
{
if (h -> type != dhcpctl_callback_type)
return ISC_R_INVALIDARG;
if (h -> inner && h -> inner -> type -> get_value)
return (*(h -> inner -> type -> get_value))
(h -> inner, id, name, value);
return ISC_R_NOTFOUND;
}
isc_result_t dhcpctl_callback_signal_handler (omapi_object_t *o,
const char *name, va_list ap)
{
dhcpctl_callback_object_t *p;
isc_result_t waitstatus;
if (o -> type != dhcpctl_callback_type)
return ISC_R_INVALIDARG;
p = (dhcpctl_callback_object_t *)o;
/* Not a signal we recognize? */
if (strcmp (name, "ready")) {
if (p -> inner && p -> inner -> type -> signal_handler)
return (*(p -> inner -> type -> signal_handler))
(p -> inner, name, ap);
return ISC_R_NOTFOUND;
}
if (p -> object -> type == dhcpctl_remote_type) {
waitstatus = (((dhcpctl_remote_object_t *)
(p -> object)) -> waitstatus);
} else
waitstatus = ISC_R_SUCCESS;
/* Do the callback. */
if (p -> callback)
(*(p -> callback)) (p -> object, waitstatus, p -> data);
return ISC_R_SUCCESS;
}
isc_result_t dhcpctl_callback_destroy (omapi_object_t *h,
const char *file, int line)
{
dhcpctl_callback_object_t *p;
if (h -> type != dhcpctl_callback_type)
return ISC_R_INVALIDARG;
p = (dhcpctl_callback_object_t *)h;
if (p -> handle)
omapi_object_dereference ((omapi_object_t **)&p -> handle,
file, line);
return ISC_R_SUCCESS;
}
/* Write all the published values associated with the object through the
specified connection. */
isc_result_t dhcpctl_callback_stuff_values (omapi_object_t *c,
omapi_object_t *id,
omapi_object_t *p)
{
int i;
if (p -> type != dhcpctl_callback_type)
return ISC_R_INVALIDARG;
if (p -> inner && p -> inner -> type -> stuff_values)
return (*(p -> inner -> type -> stuff_values)) (c, id,
p -> inner);
return ISC_R_SUCCESS;
}
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