diff options
Diffstat (limited to 'vnfs/VES/code/evel_library/evel_state_change.c')
| -rw-r--r-- | vnfs/VES/code/evel_library/evel_state_change.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/vnfs/VES/code/evel_library/evel_state_change.c b/vnfs/VES/code/evel_library/evel_state_change.c new file mode 100644 index 00000000..4b4671d6 --- /dev/null +++ b/vnfs/VES/code/evel_library/evel_state_change.c @@ -0,0 +1,295 @@ +/**************************************************************************//** + * @file + * Implementation of EVEL functions relating to the State Change. + * + * License + * ------- + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: This product includes + * software developed by the AT&T. + * 4. Neither the name of AT&T 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 AT&T INTELLECTUAL PROPERTY ''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 AT&T INTELLECTUAL PROPERTY 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. + *****************************************************************************/ + +#include <string.h> +#include <assert.h> +#include <stdlib.h> + +#include "evel_throttle.h" + +/**************************************************************************//** + * Create a new State Change event. + * + * @note The mandatory fields on the State Change must be supplied to this + * factory function and are immutable once set. Optional fields have + * explicit setter functions, but again values may only be set once + * so that the State Change has immutable properties. + * + * @param new_state The new state of the reporting entity. + * @param old_state The old state of the reporting entity. + * @param interface The card or port name of the reporting entity. + * + * @returns pointer to the newly manufactured ::EVENT_STATE_CHANGE. If the + * event is not used it must be released using + * ::evel_free_state_change + * @retval NULL Failed to create the event. + *****************************************************************************/ +EVENT_STATE_CHANGE * evel_new_state_change(const EVEL_ENTITY_STATE new_state, + const EVEL_ENTITY_STATE old_state, + const char * const interface) +{ + EVENT_STATE_CHANGE * state_change = NULL; + EVEL_ENTER(); + + /***************************************************************************/ + /* Check preconditions. */ + /***************************************************************************/ + assert(new_state < EVEL_MAX_ENTITY_STATES); + assert(old_state < EVEL_MAX_ENTITY_STATES); + assert(interface != NULL); + + /***************************************************************************/ + /* Allocate the State Change. */ + /***************************************************************************/ + state_change = malloc(sizeof(EVENT_STATE_CHANGE)); + if (state_change == NULL) + { + log_error_state("Out of memory"); + goto exit_label; + } + memset(state_change, 0, sizeof(EVENT_STATE_CHANGE)); + EVEL_DEBUG("New State Change is at %lp", state_change); + + /***************************************************************************/ + /* Initialize the header & the State Change fields. Optional string */ + /* values are uninitialized (NULL). */ + /***************************************************************************/ + evel_init_header(&state_change->header); + state_change->header.event_domain = EVEL_DOMAIN_STATE_CHANGE; + state_change->major_version = EVEL_STATE_CHANGE_MAJOR_VERSION; + state_change->minor_version = EVEL_STATE_CHANGE_MINOR_VERSION; + state_change->new_state = new_state; + state_change->old_state = old_state; + state_change->state_interface = strdup(interface); + dlist_initialize(&state_change->additional_fields); + +exit_label: + EVEL_EXIT(); + return state_change; +} + +/**************************************************************************//** + * Free a State Change. + * + * Free off the State Change supplied. Will free all the contained allocated + * memory. + * + * @note It does not free the State Change itself, since that may be part of a + * larger structure. + *****************************************************************************/ +void evel_free_state_change(EVENT_STATE_CHANGE * const state_change) +{ + STATE_CHANGE_ADDL_FIELD * addl_field = NULL; + + EVEL_ENTER(); + + /***************************************************************************/ + /* Check preconditions. As an internal API we don't allow freeing NULL */ + /* events as we do on the public API. */ + /***************************************************************************/ + assert(state_change != NULL); + assert(state_change->header.event_domain == EVEL_DOMAIN_STATE_CHANGE); + + /***************************************************************************/ + /* Free all internal strings then the header itself. */ + /***************************************************************************/ + addl_field = dlist_pop_last(&state_change->additional_fields); + while (addl_field != NULL) + { + EVEL_DEBUG("Freeing Additional Field (%s, %s)", + addl_field->name, + addl_field->value); + free(addl_field->name); + free(addl_field->value); + free(addl_field); + addl_field = dlist_pop_last(&state_change->additional_fields); + } + free(state_change->state_interface); + evel_free_header(&state_change->header); + + EVEL_EXIT(); +} + +/**************************************************************************//** + * Set the Event Type property of the State Change. + * + * @note The property is treated as immutable: it is only valid to call + * the setter once. However, we don't assert if the caller tries to + * overwrite, just ignoring the update instead. + * + * @param state_change Pointer to the ::EVENT_STATE_CHANGE. + * @param type The Event Type to be set. ASCIIZ string. The caller + * does not need to preserve the value once the function + * returns. + *****************************************************************************/ +void evel_state_change_type_set(EVENT_STATE_CHANGE * const state_change, + const char * const type) +{ + EVEL_ENTER(); + + /***************************************************************************/ + /* Check preconditions and call evel_header_type_set. */ + /***************************************************************************/ + assert(state_change != NULL); + assert(state_change->header.event_domain == EVEL_DOMAIN_STATE_CHANGE); + evel_header_type_set(&state_change->header, type); + + EVEL_EXIT(); +} + +/**************************************************************************//** + * Add an additional field name/value pair to the State Change. + * + * The name and value are null delimited ASCII strings. The library takes + * a copy so the caller does not have to preserve values after the function + * returns. + * + * @param state_change Pointer to the ::EVENT_STATE_CHANGE. + * @param name ASCIIZ string with the attribute's name. The caller + * does not need to preserve the value once the function + * returns. + * @param value ASCIIZ string with the attribute's value. The caller + * does not need to preserve the value once the function + * returns. + *****************************************************************************/ +void evel_state_change_addl_field_add(EVENT_STATE_CHANGE * const state_change, + const char * const name, + const char * const value) +{ + STATE_CHANGE_ADDL_FIELD * addl_field = NULL; + EVEL_ENTER(); + + /***************************************************************************/ + /* Check preconditions. */ + /***************************************************************************/ + assert(state_change != NULL); + assert(state_change->header.event_domain == EVEL_DOMAIN_STATE_CHANGE); + assert(name != NULL); + assert(value != NULL); + + EVEL_DEBUG("Adding name=%s value=%s", name, value); + addl_field = malloc(sizeof(STATE_CHANGE_ADDL_FIELD)); + assert(addl_field != NULL); + memset(addl_field, 0, sizeof(STATE_CHANGE_ADDL_FIELD)); + addl_field->name = strdup(name); + addl_field->value = strdup(value); + assert(addl_field->name != NULL); + assert(addl_field->value != NULL); + + dlist_push_last(&state_change->additional_fields, addl_field); + + EVEL_EXIT(); +} + +/**************************************************************************//** + * Encode the state change as a JSON state change. + * + * @param jbuf Pointer to the ::EVEL_JSON_BUFFER to encode into. + * @param state_change Pointer to the ::EVENT_STATE_CHANGE to encode. + *****************************************************************************/ +void evel_json_encode_state_change(EVEL_JSON_BUFFER * jbuf, + EVENT_STATE_CHANGE * state_change) +{ + STATE_CHANGE_ADDL_FIELD * addl_field = NULL; + DLIST_ITEM * addl_field_item = NULL; + char * new_state; + char * old_state; + + EVEL_ENTER(); + + /***************************************************************************/ + /* Check preconditions. */ + /***************************************************************************/ + assert(state_change != NULL); + assert(state_change->header.event_domain == EVEL_DOMAIN_STATE_CHANGE); + + new_state = evel_entity_state(state_change->new_state); + old_state = evel_entity_state(state_change->old_state); + + evel_json_encode_header(jbuf, &state_change->header); + evel_json_open_named_object(jbuf, "stateChangeFields"); + + /***************************************************************************/ + /* Mandatory fields. */ + /***************************************************************************/ + evel_enc_kv_string(jbuf, "newState", new_state); + evel_enc_kv_string(jbuf, "oldState", old_state); + evel_enc_kv_string(jbuf, "stateInterface", state_change->state_interface); + + /***************************************************************************/ + /* Optional fields. */ + /***************************************************************************/ + evel_json_checkpoint(jbuf); + if (evel_json_open_opt_named_list(jbuf, "additionalFields")) + { + bool item_added = false; + + addl_field_item = dlist_get_first(&state_change->additional_fields); + while (addl_field_item != NULL) + { + addl_field = (STATE_CHANGE_ADDL_FIELD *) addl_field_item->item; + assert(addl_field != NULL); + + if (!evel_throttle_suppress_nv_pair(jbuf->throttle_spec, + "additionalFields", + addl_field->name)) + { + evel_json_open_object(jbuf); + evel_enc_kv_string(jbuf, "name", addl_field->name); + evel_enc_kv_string(jbuf, "value", addl_field->value); + evel_json_close_object(jbuf); + item_added = true; + } + addl_field_item = dlist_get_next(addl_field_item); + } + evel_json_close_list(jbuf); + + /*************************************************************************/ + /* If we've not written anything, rewind to before we opened the list. */ + /*************************************************************************/ + if (!item_added) + { + evel_json_rewind(jbuf); + } + } + + evel_enc_version(jbuf, + "stateChangeFieldsVersion", + state_change->major_version, + state_change->minor_version); + + evel_json_close_object(jbuf); + + EVEL_EXIT(); +} |