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NetBSD/dist/dhcp/omapip/message.c

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import of ISC dhcp-3.0rc10
2001-08-03 15:35:28 +04:00
/* message.c
Subroutines for dealing with message objects. */
/*
* Copyright (c) 1999-2000 Internet Software Consortium.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of The Internet Software Consortium nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This software has been written for the Internet Software Consortium
* by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
* To learn more about the Internet Software 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''.
*/
#include <omapip/omapip_p.h>
OMAPI_OBJECT_ALLOC (omapi_message,
omapi_message_object_t, omapi_type_message)
omapi_message_object_t *omapi_registered_messages;
isc_result_t omapi_message_new (omapi_object_t **o, const char *file, int line)
{
omapi_message_object_t *m;
omapi_object_t *g;
isc_result_t status;
m = (omapi_message_object_t *)0;
status = omapi_message_allocate (&m, file, line);
if (status != ISC_R_SUCCESS)
return status;
g = (omapi_object_t *)0;
status = omapi_generic_new (&g, file, line);
if (status != ISC_R_SUCCESS) {
dfree (m, file, line);
return status;
}
status = omapi_object_reference (&m -> inner, g, file, line);
if (status != ISC_R_SUCCESS) {
omapi_object_dereference ((omapi_object_t **)&m, file, line);
omapi_object_dereference (&g, file, line);
return status;
}
status = omapi_object_reference (&g -> outer,
(omapi_object_t *)m, file, line);
if (status != ISC_R_SUCCESS) {
omapi_object_dereference ((omapi_object_t **)&m, file, line);
omapi_object_dereference (&g, file, line);
return status;
}
status = omapi_object_reference (o, (omapi_object_t *)m, file, line);
omapi_message_dereference (&m, file, line);
omapi_object_dereference (&g, file, line);
if (status != ISC_R_SUCCESS)
return status;
return status;
}
isc_result_t omapi_message_set_value (omapi_object_t *h,
omapi_object_t *id,
omapi_data_string_t *name,
omapi_typed_data_t *value)
{
omapi_message_object_t *m;
isc_result_t status;
if (h -> type != omapi_type_message)
return ISC_R_INVALIDARG;
m = (omapi_message_object_t *)h;
/* Can't set authlen. */
/* Can set authenticator, but the value must be typed data. */
if (!omapi_ds_strcmp (name, "authenticator")) {
if (m -> authenticator)
omapi_typed_data_dereference (&m -> authenticator,
MDL);
omapi_typed_data_reference (&m -> authenticator, value, MDL);
return ISC_R_SUCCESS;
} else if (!omapi_ds_strcmp (name, "object")) {
if (value -> type != omapi_datatype_object)
return ISC_R_INVALIDARG;
if (m -> object)
omapi_object_dereference (&m -> object, MDL);
omapi_object_reference (&m -> object, value -> u.object, MDL);
return ISC_R_SUCCESS;
} else if (!omapi_ds_strcmp (name, "notify-object")) {
if (value -> type != omapi_datatype_object)
return ISC_R_INVALIDARG;
if (m -> notify_object)
omapi_object_dereference (&m -> notify_object, MDL);
omapi_object_reference (&m -> notify_object,
value -> u.object, MDL);
return ISC_R_SUCCESS;
/* Can set authid, but it has to be an integer. */
} else if (!omapi_ds_strcmp (name, "authid")) {
if (value -> type != omapi_datatype_int)
return ISC_R_INVALIDARG;
m -> authid = value -> u.integer;
return ISC_R_SUCCESS;
/* Can set op, but it has to be an integer. */
} else if (!omapi_ds_strcmp (name, "op")) {
if (value -> type != omapi_datatype_int)
return ISC_R_INVALIDARG;
m -> op = value -> u.integer;
return ISC_R_SUCCESS;
/* Handle also has to be an integer. */
} else if (!omapi_ds_strcmp (name, "handle")) {
if (value -> type != omapi_datatype_int)
return ISC_R_INVALIDARG;
m -> h = value -> u.integer;
return ISC_R_SUCCESS;
/* Transaction ID has to be an integer. */
} else if (!omapi_ds_strcmp (name, "id")) {
if (value -> type != omapi_datatype_int)
return ISC_R_INVALIDARG;
m -> id = value -> u.integer;
return ISC_R_SUCCESS;
/* Remote transaction ID has to be an integer. */
} else if (!omapi_ds_strcmp (name, "rid")) {
if (value -> type != omapi_datatype_int)
return ISC_R_INVALIDARG;
m -> rid = value -> u.integer;
return ISC_R_SUCCESS;
}
/* Try to find some inner object that can take the value. */
if (h -> inner && h -> inner -> type -> set_value) {
status = ((*(h -> inner -> type -> set_value))
(h -> inner, id, name, value));
if (status == ISC_R_SUCCESS)
return status;
}
return ISC_R_NOTFOUND;
}
isc_result_t omapi_message_get_value (omapi_object_t *h,
omapi_object_t *id,
omapi_data_string_t *name,
omapi_value_t **value)
{
omapi_message_object_t *m;
if (h -> type != omapi_type_message)
return ISC_R_INVALIDARG;
m = (omapi_message_object_t *)h;
/* Look for values that are in the message data structure. */
if (!omapi_ds_strcmp (name, "authlen"))
return omapi_make_int_value (value, name, (int)m -> authlen,
MDL);
else if (!omapi_ds_strcmp (name, "authenticator")) {
if (m -> authenticator)
return omapi_make_value (value, name,
m -> authenticator, MDL);
else
return ISC_R_NOTFOUND;
} else if (!omapi_ds_strcmp (name, "authid")) {
return omapi_make_int_value (value,
name, (int)m -> authid, MDL);
} else if (!omapi_ds_strcmp (name, "op")) {
return omapi_make_int_value (value, name, (int)m -> op, MDL);
} else if (!omapi_ds_strcmp (name, "handle")) {
return omapi_make_int_value (value, name, (int)m -> h, MDL);
} else if (!omapi_ds_strcmp (name, "id")) {
return omapi_make_int_value (value, name, (int)m -> id, MDL);
} else if (!omapi_ds_strcmp (name, "rid")) {
return omapi_make_int_value (value, name, (int)m -> rid, MDL);
}
/* See if there's an inner object that has the value. */
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 omapi_message_destroy (omapi_object_t *h,
const char *file, int line)
{
omapi_message_object_t *m;
if (h -> type != omapi_type_message)
return ISC_R_INVALIDARG;
m = (omapi_message_object_t *)h;
if (m -> authenticator) {
omapi_typed_data_dereference (&m -> authenticator, file, line);
}
if (!m -> prev && omapi_registered_messages != m)
omapi_message_unregister (h);
if (m -> id_object)
omapi_object_dereference (&m -> id_object, file, line);
if (m -> object)
omapi_object_dereference (&m -> object, file, line);
if (m -> notify_object)
omapi_object_dereference (&m -> notify_object, file, line);
if (m -> protocol_object)
omapi_protocol_dereference (&m -> protocol_object, file, line);
return ISC_R_SUCCESS;
}
isc_result_t omapi_message_signal_handler (omapi_object_t *h,
const char *name, va_list ap)
{
omapi_message_object_t *m;
if (h -> type != omapi_type_message)
return ISC_R_INVALIDARG;
m = (omapi_message_object_t *)h;
if (!strcmp (name, "status")) {
if (m -> notify_object &&
m -> notify_object -> type -> signal_handler)
return ((m -> notify_object -> type -> signal_handler))
(m -> notify_object, name, ap);
else if (m -> object && m -> object -> type -> signal_handler)
return ((m -> object -> type -> signal_handler))
(m -> object, name, ap);
}
if (h -> inner && h -> inner -> type -> signal_handler)
return (*(h -> inner -> type -> signal_handler)) (h -> inner,
name, ap);
return ISC_R_NOTFOUND;
}
/* Write all the published values associated with the object through the
specified connection. */
isc_result_t omapi_message_stuff_values (omapi_object_t *c,
omapi_object_t *id,
omapi_object_t *m)
{
if (m -> type != omapi_type_message)
return ISC_R_INVALIDARG;
if (m -> inner && m -> inner -> type -> stuff_values)
return (*(m -> inner -> type -> stuff_values)) (c, id,
m -> inner);
return ISC_R_SUCCESS;
}
isc_result_t omapi_message_register (omapi_object_t *mo)
{
omapi_message_object_t *m;
if (mo -> type != omapi_type_message)
return ISC_R_INVALIDARG;
m = (omapi_message_object_t *)mo;
/* Already registered? */
if (m -> prev || m -> next || omapi_registered_messages == m)
return ISC_R_INVALIDARG;
if (omapi_registered_messages) {
omapi_object_reference
((omapi_object_t **)&m -> next,
(omapi_object_t *)omapi_registered_messages, MDL);
omapi_object_reference
((omapi_object_t **)&omapi_registered_messages -> prev,
(omapi_object_t *)m, MDL);
omapi_object_dereference
((omapi_object_t **)&omapi_registered_messages, MDL);
}
omapi_object_reference
((omapi_object_t **)&omapi_registered_messages,
(omapi_object_t *)m, MDL);
return ISC_R_SUCCESS;;
}
isc_result_t omapi_message_unregister (omapi_object_t *mo)
{
omapi_message_object_t *m;
omapi_message_object_t *n;
if (mo -> type != omapi_type_message)
return ISC_R_INVALIDARG;
m = (omapi_message_object_t *)mo;
/* Not registered? */
if (!m -> prev && omapi_registered_messages != m)
return ISC_R_INVALIDARG;
n = (omapi_message_object_t *)0;
if (m -> next) {
omapi_object_reference ((omapi_object_t **)&n,
(omapi_object_t *)m -> next, MDL);
omapi_object_dereference ((omapi_object_t **)&m -> next, MDL);
}
if (m -> prev) {
omapi_message_object_t *tmp = (omapi_message_object_t *)0;
omapi_object_reference ((omapi_object_t **)&tmp,
(omapi_object_t *)m -> prev, MDL);
omapi_object_dereference ((omapi_object_t **)&m -> prev, MDL);
if (tmp -> next)
omapi_object_dereference
((omapi_object_t **)&tmp -> next, MDL);
if (n)
omapi_object_reference
((omapi_object_t **)&tmp -> next,
(omapi_object_t *)n, MDL);
omapi_object_dereference ((omapi_object_t **)&tmp, MDL);
} else {
omapi_object_dereference
((omapi_object_t **)&omapi_registered_messages, MDL);
if (n)
omapi_object_reference
((omapi_object_t **)&omapi_registered_messages,
(omapi_object_t *)n, MDL);
}
if (n)
omapi_object_dereference ((omapi_object_t **)&n, MDL);
return ISC_R_SUCCESS;
}
#ifdef DEBUG_PROTOCOL
static const char *omapi_message_op_name(int op) {
switch (op) {
case OMAPI_OP_OPEN: return "OMAPI_OP_OPEN";
case OMAPI_OP_REFRESH: return "OMAPI_OP_REFRESH";
case OMAPI_OP_UPDATE: return "OMAPI_OP_UPDATE";
case OMAPI_OP_STATUS: return "OMAPI_OP_STATUS";
case OMAPI_OP_DELETE: return "OMAPI_OP_DELETE";
case OMAPI_OP_NOTIFY: return "OMAPI_OP_NOTIFY";
default: return "(unknown op)";
}
}
#endif
static isc_result_t
omapi_message_process_internal (omapi_object_t *, omapi_object_t *);
isc_result_t omapi_message_process (omapi_object_t *mo, omapi_object_t *po)
{
isc_result_t status;
#if defined (DEBUG_MEMORY_LEAKAGE)
unsigned long previous_outstanding = dmalloc_outstanding;
#endif
status = omapi_message_process_internal (mo, po);
#if defined (DEBUG_MEMORY_LEAKAGE) && 0
log_info ("generation %ld: %ld new, %ld outstanding, %ld long-term",
dmalloc_generation,
dmalloc_outstanding - previous_outstanding,
dmalloc_outstanding, dmalloc_longterm);
#endif
#if defined (DEBUG_MEMORY_LEAKAGE) && 0
dmalloc_dump_outstanding ();
#endif
#if defined (DEBUG_RC_HISTORY_EXHAUSTIVELY) && 0
dump_rc_history ();
#endif
return status;
}
static isc_result_t
omapi_message_process_internal (omapi_object_t *mo, omapi_object_t *po)
{
omapi_message_object_t *message, *m;
omapi_object_t *object = (omapi_object_t *)0;
omapi_value_t *tv = (omapi_value_t *)0;
unsigned long create, update, exclusive;
unsigned long wsi;
isc_result_t status, waitstatus;
omapi_object_type_t *type;
if (mo -> type != omapi_type_message)
return ISC_R_INVALIDARG;
message = (omapi_message_object_t *)mo;
#ifdef DEBUG_PROTOCOL
log_debug ("omapi_message_process(): "
"op=%s handle=%#x id=%#x rid=%#x",
omapi_message_op_name (message -> op),
message -> h, message -> id, message -> rid);
#endif
if (message -> rid) {
for (m = omapi_registered_messages; m; m = m -> next)
if (m -> id == message -> rid)
break;
/* If we don't have a real message corresponding to
the message ID to which this message claims it is a
response, something's fishy. */
if (!m)
return ISC_R_NOTFOUND;
/* The authenticator on responses must match the initial
message. */
if (message -> authid != m -> authid)
return ISC_R_NOTFOUND;
} else {
m = (omapi_message_object_t *)0;
/* All messages must have an authenticator, with the exception
of messages that are opening a new authenticator. */
if (omapi_protocol_authenticated (po) &&
!message -> id_object &&
message -> op != OMAPI_OP_OPEN) {
return omapi_protocol_send_status
(po, message -> id_object, ISC_R_NOKEYS,
message -> id, "No authenticator on message");
}
}
switch (message -> op) {
case OMAPI_OP_OPEN:
if (m) {
return omapi_protocol_send_status
(po, message -> id_object, ISC_R_INVALIDARG,
message -> id, "OPEN can't be a response");
}
/* Get the type of the requested object, if one was
specified. */
status = omapi_get_value_str (mo, message -> id_object,
"type", &tv);
if (status == ISC_R_SUCCESS &&
(tv -> value -> type == omapi_datatype_data ||
tv -> value -> type == omapi_datatype_string)) {
for (type = omapi_object_types;
type; type = type -> next)
if (!omapi_td_strcmp (tv -> value,
type -> name))
break;
} else
type = (omapi_object_type_t *)0;
if (tv)
omapi_value_dereference (&tv, MDL);
/* If this object had no authenticator, the requested object
must be an authenticator object. */
if (omapi_protocol_authenticated (po) &&
!message -> id_object &&
type != omapi_type_auth_key) {
return omapi_protocol_send_status
(po, message -> id_object, ISC_R_NOKEYS,
message -> id, "No authenticator on message");
}
/* Get the create flag. */
status = omapi_get_value_str (mo, message -> id_object,
"create", &tv);
if (status == ISC_R_SUCCESS) {
status = omapi_get_int_value (&create, tv -> value);
omapi_value_dereference (&tv, MDL);
if (status != ISC_R_SUCCESS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"invalid create flag value");
}
} else
create = 0;
/* Get the update flag. */
status = omapi_get_value_str (mo, message -> id_object,
"update", &tv);
if (status == ISC_R_SUCCESS) {
status = omapi_get_int_value (&update, tv -> value);
omapi_value_dereference (&tv, MDL);
if (status != ISC_R_SUCCESS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"invalid update flag value");
}
} else
update = 0;
/* Get the exclusive flag. */
status = omapi_get_value_str (mo, message -> id_object,
"exclusive", &tv);
if (status == ISC_R_SUCCESS) {
status = omapi_get_int_value (&exclusive, tv -> value);
omapi_value_dereference (&tv, MDL);
if (status != ISC_R_SUCCESS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"invalid exclusive flag value");
}
} else
exclusive = 0;
/* If we weren't given a type, look the object up with
the handle. */
if (!type) {
if (create) {
return omapi_protocol_send_status
(po, message -> id_object,
ISC_R_INVALIDARG,
message -> id,
"type required on create");
}
goto refresh;
}
/* If the type doesn't provide a lookup method, we can't
look up the object. */
if (!type -> lookup) {
return omapi_protocol_send_status
(po, message -> id_object,
ISC_R_NOTIMPLEMENTED, message -> id,
"unsearchable object type");
}
status = (*(type -> lookup)) (&object, message -> id_object,
message -> object);
if (status != ISC_R_SUCCESS &&
status != ISC_R_NOTFOUND &&
status != ISC_R_NOKEYS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"object lookup failed");
}
/* If we didn't find the object and we aren't supposed to
create it, return an error. */
if (status == ISC_R_NOTFOUND && !create) {
return omapi_protocol_send_status
(po, message -> id_object,
ISC_R_NOTFOUND, message -> id,
"no object matches specification");
}
/* If we found an object, we're supposed to be creating an
object, and we're not supposed to have found an object,
return an error. */
if (status == ISC_R_SUCCESS && create && exclusive) {
omapi_object_dereference (&object, MDL);
return omapi_protocol_send_status
(po, message -> id_object,
ISC_R_EXISTS, message -> id,
"specified object already exists");
}
/* If we're creating the object, do it now. */
if (!object) {
status = omapi_object_create (&object,
message -> id_object,
type);
if (status != ISC_R_SUCCESS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"can't create new object");
}
}
/* If we're updating it, do so now. */
if (create || update) {
/* This check does not belong here. */
if (object -> type == omapi_type_auth_key) {
omapi_object_dereference (&object, MDL);
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"can't update object");
}
status = omapi_object_update (object,
message -> id_object,
message -> object,
message -> h);
if (status != ISC_R_SUCCESS) {
omapi_object_dereference (&object, MDL);
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"can't update object");
}
}
/* If this is an authenticator object, add it to the active
set for the connection. */
if (object -> type == omapi_type_auth_key) {
omapi_handle_t handle;
status = omapi_object_handle (&handle, object);
if (status != ISC_R_SUCCESS) {
omapi_object_dereference (&object, MDL);
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"can't select authenticator");
}
status = omapi_protocol_add_auth (po, object, handle);
if (status != ISC_R_SUCCESS) {
omapi_object_dereference (&object, MDL);
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"can't select authenticator");
}
}
/* Now send the new contents of the object back in
response. */
goto send;
case OMAPI_OP_REFRESH:
refresh:
status = omapi_handle_lookup (&object, message -> h);
if (status != ISC_R_SUCCESS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"no matching handle");
}
send:
status = omapi_protocol_send_update (po, message -> id_object,
message -> id, object);
omapi_object_dereference (&object, MDL);
return status;
case OMAPI_OP_UPDATE:
if (m && m -> object) {
omapi_object_reference (&object, m -> object, MDL);
} else {
status = omapi_handle_lookup (&object, message -> h);
if (status != ISC_R_SUCCESS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"no matching handle");
}
}
if (object -> type == omapi_type_auth_key ||
(object -> inner &&
object -> inner -> type == omapi_type_auth_key)) {
if (!m) {
omapi_object_dereference (&object, MDL);
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"cannot update authenticator");
}
status = omapi_protocol_add_auth (po, object,
message -> h);
} else {
status = omapi_object_update (object,
message -> id_object,
message -> object,
message -> h);
}
if (status != ISC_R_SUCCESS) {
omapi_object_dereference (&object, MDL);
if (!message -> rid)
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"can't update object");
if (m)
omapi_signal ((omapi_object_t *)m,
"status", status,
(omapi_typed_data_t *)0);
return ISC_R_SUCCESS;
}
if (!message -> rid)
status = omapi_protocol_send_status
(po, message -> id_object, ISC_R_SUCCESS,
message -> id, (char *)0);
if (m)
omapi_signal ((omapi_object_t *)m,
"status", ISC_R_SUCCESS,
(omapi_typed_data_t *)0);
return status;
case OMAPI_OP_NOTIFY:
return omapi_protocol_send_status
(po, message -> id_object, ISC_R_NOTIMPLEMENTED,
message -> id, "notify not implemented yet");
case OMAPI_OP_STATUS:
/* The return status of a request. */
if (!m)
return ISC_R_UNEXPECTED;
/* Get the wait status. */
status = omapi_get_value_str (mo, message -> id_object,
"result", &tv);
if (status == ISC_R_SUCCESS) {
status = omapi_get_int_value (&wsi, tv -> value);
waitstatus = wsi;
omapi_value_dereference (&tv, MDL);
if (status != ISC_R_SUCCESS)
waitstatus = ISC_R_UNEXPECTED;
} else
waitstatus = ISC_R_UNEXPECTED;
status = omapi_get_value_str (mo, message -> id_object,
"message", &tv);
omapi_signal ((omapi_object_t *)m, "status", waitstatus, tv);
if (status == ISC_R_SUCCESS)
omapi_value_dereference (&tv, MDL);
return ISC_R_SUCCESS;
case OMAPI_OP_DELETE:
status = omapi_handle_lookup (&object, message -> h);
if (status != ISC_R_SUCCESS) {
return omapi_protocol_send_status
(po, message -> id_object,
status, message -> id,
"no matching handle");
}
if (!object -> type -> remove)
return omapi_protocol_send_status
(po, message -> id_object,
ISC_R_NOTIMPLEMENTED, message -> id,
"no remove method for object");
status = (*(object -> type -> remove)) (object,
message -> id_object);
omapi_object_dereference (&object, MDL);
return omapi_protocol_send_status (po, message -> id_object,
status, message -> id,
(char *)0);
}
return ISC_R_NOTIMPLEMENTED;
}