workbench/network/stacks/AROSTCP/dhcp/dhcpctl/callback.c

   1 /* callback.c
   2
   3    The dhcpctl callback object. */
   4
   5 /*
   6  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   7  * Copyright (c) 1999-2003 by Internet Software Consortium
   8  *
   9  * Permission to use, copy, modify, and distribute this software for any
  10  * purpose with or without fee is hereby granted, provided that the above
  11  * copyright notice and this permission notice appear in all copies.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  14  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  15  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  16  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  17  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  19  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20  *
  21  *   Internet Systems Consortium, Inc.
  22  *   950 Charter Street
  23  *   Redwood City, CA 94063
  24  *   <info@isc.org>
  25  *   http://www.isc.org/
  26  *
  27  * This software has been written for Internet Systems Consortium
  28  * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
  29  * To learn more about Internet Systems Consortium, see
  30  * ``http://www.isc.org/''.  To learn more about Vixie Enterprises,
  31  * see ``http://www.vix.com''.   To learn more about Nominum, Inc., see
  32  * ``http://www.nominum.com''.
  33  */
  34
  35 #ifndef lint
  36 static char copyright[] =
  37 "$Id$ Copyright (c) 2004 Internet Systems Consortium.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #include <omapip/omapip_p.h>
  41 #include "dhcpctl.h"
  42
  43 /* dhcpctl_set_callback
  44
  45    synchronous, with asynchronous aftereffect
  46    handle is some object upon which some kind of process has been
  47    started - e.g., an open, an update or a refresh.
  48    data is an anonymous pointer containing some information that
  49    the callback will use to figure out what event completed.
  50    return value of 0 means callback was successfully set, a nonzero
  51    status code is returned otherwise.
  52    Upon completion of whatever task is in process, the callback
  53    will be passed the handle to the object, a status code
  54    indicating what happened, and the anonymous pointer passed to  */
  55
  56 dhcpctl_status dhcpctl_set_callback (dhcpctl_handle h, void *data,
  57                                      void (*func) (dhcpctl_handle,
  58                                                    dhcpctl_status, void *))
  59 {
  60         dhcpctl_callback_object_t *callback;
  61         omapi_object_t *inner;
  62         isc_result_t status;
  63
  64         callback = dmalloc (sizeof *callback, MDL);
  65         if (!callback)
  66                 return ISC_R_NOMEMORY;
  67
  68         /* Tie the callback object to the innermost object in the chain. */
  69         for (inner = h; inner -> inner; inner = inner -> inner)
  70                 ;
  71         omapi_object_reference (&inner -> inner,
  72                                 (omapi_object_t *)callback, MDL);
  73         omapi_object_reference ((omapi_object_t **)&callback -> outer,
  74                                 inner, MDL);
  75
  76         /* Save the actual handle pointer we were passed for the callback. */
  77         omapi_object_reference (&callback -> object, h, MDL);
  78         callback -> data = data;
  79         callback -> callback = func;
  80
  81         return ISC_R_SUCCESS;
  82 }
  83
  84 /* Callback methods (not meant to be called directly) */
  85
  86 isc_result_t dhcpctl_callback_set_value (omapi_object_t *h,
  87                                          omapi_object_t *id,
  88                                          omapi_data_string_t *name,
  89                                          omapi_typed_data_t *value)
  90 {
  91         if (h -> type != dhcpctl_callback_type)
  92                 return ISC_R_INVALIDARG;
  93
  94         if (h -> inner && h -> inner -> type -> set_value)
  95                 return (*(h -> inner -> type -> set_value))
  96                         (h -> inner, id, name, value);
  97         return ISC_R_NOTFOUND;
  98 }
  99
 100 isc_result_t dhcpctl_callback_get_value (omapi_object_t *h,
 101                                          omapi_object_t *id,
 102                                          omapi_data_string_t *name,
 103                                          omapi_value_t **value)
 104 {
 105         if (h -> type != dhcpctl_callback_type)
 106                 return ISC_R_INVALIDARG;
 107
 108         if (h -> inner && h -> inner -> type -> get_value)
 109                 return (*(h -> inner -> type -> get_value))
 110                         (h -> inner, id, name, value);
 111         return ISC_R_NOTFOUND;
 112 }
 113
 114 isc_result_t dhcpctl_callback_signal_handler (omapi_object_t *o,
 115                                               const char *name, va_list ap)
 116 {
 117         dhcpctl_callback_object_t *p;
 118         isc_result_t waitstatus;
 119
 120         if (o -> type != dhcpctl_callback_type)
 121                 return ISC_R_INVALIDARG;
 122         p = (dhcpctl_callback_object_t *)o;
 123
 124         /* Not a signal we recognize? */
 125         if (strcmp (name, "ready")) {
 126                 if (p -> inner && p -> inner -> type -> signal_handler)
 127                         return (*(p -> inner -> type -> signal_handler))
 128                                 (p -> inner, name, ap);
 129                 return ISC_R_NOTFOUND;
 130         }
 131
 132         if (p -> object -> type == dhcpctl_remote_type) {
 133                 waitstatus = (((dhcpctl_remote_object_t *)
 134                                (p -> object)) -> waitstatus);
 135         } else
 136                 waitstatus = ISC_R_SUCCESS;
 137
 138         /* Do the callback. */
 139         if (p -> callback)
 140                 (*(p -> callback)) (p -> object, waitstatus, p -> data);
 141
 142         return ISC_R_SUCCESS;
 143 }
 144
 145 isc_result_t dhcpctl_callback_destroy (omapi_object_t *h,
 146                                        const char *file, int line)
 147 {
 148         dhcpctl_callback_object_t *p;
 149         if (h -> type != dhcpctl_callback_type)
 150                 return ISC_R_INVALIDARG;
 151         p = (dhcpctl_callback_object_t *)h;
 152         if (p -> handle)
 153                 omapi_object_dereference ((omapi_object_t **)&p -> handle,
 154                                           file, line);
 155         return ISC_R_SUCCESS;
 156 }
 157
 158 /* Write all the published values associated with the object through the
 159    specified connection. */
 160
 161 isc_result_t dhcpctl_callback_stuff_values (omapi_object_t *c,
 162                                             omapi_object_t *id,
 163                                             omapi_object_t *p)
 164 {
 165         int i;
 166
 167         if (p -> type != dhcpctl_callback_type)
 168                 return ISC_R_INVALIDARG;
 169
 170         if (p -> inner && p -> inner -> type -> stuff_values)
 171                 return (*(p -> inner -> type -> stuff_values)) (c, id,
 172                                                                 p -> inner);
 173         return ISC_R_SUCCESS;
 174 }
 175