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Diffstat (limited to 'dhcpctl/callback.c')
| -rw-r--r-- | dhcpctl/callback.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/dhcpctl/callback.c b/dhcpctl/callback.c new file mode 100644 index 0000000..b9033f4 --- /dev/null +++ b/dhcpctl/callback.c @@ -0,0 +1,168 @@ +/* callback.c + + The dhcpctl callback object. */ + +/* + * Copyright (c) 2004,2007,2009 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> + * https://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 + * ``https://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 "dhcpd.h" +#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; + + 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 DHCP_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 DHCP_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 DHCP_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 DHCP_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) +{ + if (p -> type != dhcpctl_callback_type) + return DHCP_R_INVALIDARG; + + if (p -> inner && p -> inner -> type -> stuff_values) + return (*(p -> inner -> type -> stuff_values)) (c, id, + p -> inner); + return ISC_R_SUCCESS; +} + |