diff options
Diffstat (limited to 'vnfs/VES/code/evel_library/evel.c')
| -rw-r--r-- | vnfs/VES/code/evel_library/evel.c | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/vnfs/VES/code/evel_library/evel.c b/vnfs/VES/code/evel_library/evel.c new file mode 100644 index 00000000..3380cace --- /dev/null +++ b/vnfs/VES/code/evel_library/evel.c @@ -0,0 +1,395 @@ +/**************************************************************************//** + * @file + * Source module isolating the ECOMP Vendor Event Listener (EVEL) API. + * + * This file implements the EVEL library which is intended to provide a + * simple wrapper around the complexity of AT&T's Vendor Event Listener API so + * that VNFs can use it without worrying about details of: + * + * * The API's encoding into JSON. + * * The API's transport over HTTP/HTTPS. + * + * License + * ------- + * + * Copyright(c) <2016>, AT&T Intellectual Property. All other 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. 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 <sys/time.h> +#include <curl/curl.h> + +#include "evel.h" +#include "evel_internal.h" +#include "evel_throttle.h" +#include "metadata.h" + +/**************************************************************************//** + * The type of equipment represented by this VNF. + *****************************************************************************/ +EVEL_SOURCE_TYPES event_source_type = EVEL_SOURCE_OTHER; + +/**************************************************************************//** + * The Functional Role of the equipment represented by this VNF. + *****************************************************************************/ +char *functional_role = NULL; + +/**************************************************************************//** + * Library initialization. + * + * Initialize the EVEL library. + * + * @note This function initializes the cURL library. Applications making use + * of libcurl may need to pull the initialization out of here. Note + * also that this function is not threadsafe as a result - refer to + * libcurl's API documentation for relevant warnings. + * + * @sa Matching Term function. + * + * @param fqdn The API's FQDN or IP address. + * @param port The API's port. + * @param path The optional path (may be NULL). + * @param topic The optional topic part of the URL (may be NULL). + * @param secure Whether to use HTTPS (0=HTTP, 1=HTTPS) + * @param username Username for Basic Authentication of requests. + * @param password Password for Basic Authentication of requests. + * @param source_type The kind of node we represent. + * @param role The role this node undertakes. + * @param verbosity 0 for normal operation, positive values for chattier + * logs. + * + * @returns Status code + * @retval EVEL_SUCCESS On success + * @retval ::EVEL_ERR_CODES On failure. + *****************************************************************************/ +EVEL_ERR_CODES evel_initialize(const char * const fqdn, + int port, + const char * const path, + const char * const topic, + int secure, + const char * const username, + const char * const password, + EVEL_SOURCE_TYPES source_type, + const char * const role, + int verbosity + ) +{ + EVEL_ERR_CODES rc = EVEL_SUCCESS; + char base_api_url[EVEL_MAX_URL_LEN + 1] = {0}; + char event_api_url[EVEL_MAX_URL_LEN + 1] = {0}; + char throt_api_url[EVEL_MAX_URL_LEN + 1] = {0}; + char path_url[EVEL_MAX_URL_LEN + 1] = {0}; + char topic_url[EVEL_MAX_URL_LEN + 1] = {0}; + char version_string[10] = {0}; + int offset; + + /***************************************************************************/ + /* Check assumptions. */ + /***************************************************************************/ + assert(fqdn != NULL); + assert(port > 0 && port <= 65535); + assert(source_type < EVEL_MAX_SOURCE_TYPES); + assert(role != NULL); + + /***************************************************************************/ + /* Start logging so we can report on progress. */ + /***************************************************************************/ + log_initialize(verbosity == 0 ? EVEL_LOG_INFO : EVEL_LOG_DEBUG, "EVEL"); + EVEL_INFO("EVEL started"); + EVEL_INFO("API server is: %s", fqdn); + EVEL_INFO("API port is: %d", port); + + if (path != NULL) + { + EVEL_INFO("API path is: %s", path); + } + else + { + EVEL_INFO("No API path"); + } + + if (topic != NULL) + { + EVEL_INFO("API topic is: %s", topic); + } + else + { + EVEL_INFO("No API topic"); + } + + EVEL_INFO("API transport is: %s", secure ? "HTTPS" : "HTTP"); + EVEL_INFO("Event Source Type is: %d", source_type); + EVEL_INFO("Functional Role is: %s", role); + EVEL_INFO("Log verbosity is: %d", verbosity); + + /***************************************************************************/ + /* Initialize event throttling to the default state. */ + /***************************************************************************/ + evel_throttle_initialize(); + + /***************************************************************************/ + /* Save values we will need during operation. */ + /***************************************************************************/ + event_source_type = source_type; + functional_role = strdup(role); + + /***************************************************************************/ + /* Ensure there are no trailing zeroes and unnecessary decimal points in */ + /* the version. */ + /***************************************************************************/ + offset = sprintf(version_string, "%d", EVEL_API_MAJOR_VERSION); + + if (EVEL_API_MINOR_VERSION != 0) + { + sprintf(version_string + offset, ".%d", EVEL_API_MINOR_VERSION); + } + + /***************************************************************************/ + /* Build a common base of the API URLs. */ + /***************************************************************************/ + strcpy(path_url, "/"); + snprintf(base_api_url, + EVEL_MAX_URL_LEN, + "%s://%s:%d%s/eventListener/v%s", + secure ? "https" : "http", + fqdn, + port, + (((path != NULL) && (strlen(path) > 0)) ? + strncat(path_url, path, EVEL_MAX_URL_LEN) : ""), + version_string); + + /***************************************************************************/ + /* Build the URL to the event API. */ + /***************************************************************************/ + strcpy(topic_url, "/"); + snprintf(event_api_url, + EVEL_MAX_URL_LEN, + "%s%s", + base_api_url, + (((topic != NULL) && (strlen(topic) > 0)) ? + strncat(topic_url, topic, EVEL_MAX_URL_LEN) : "")); + EVEL_INFO("Vendor Event Listener API is located at: %s", event_api_url); + + /***************************************************************************/ + /* Build the URL to the throttling API. */ + /***************************************************************************/ + snprintf(throt_api_url, + EVEL_MAX_URL_LEN, + "%s/clientThrottlingState", + base_api_url); + EVEL_INFO("Vendor Event Throttling API is located at: %s", throt_api_url); + + /***************************************************************************/ + /* Spin-up the event-handler, which gets cURL readied for use. */ + /***************************************************************************/ + rc = event_handler_initialize(event_api_url, + throt_api_url, + username, + password, + verbosity); + if (rc != EVEL_SUCCESS) + { + log_error_state("Failed to initialize event handler (including cURL)"); + goto exit_label; + } + + /***************************************************************************/ + /* Extract the metadata from OpenStack. If we fail to extract it, we */ + /* record that in the logs, but carry on, assuming we're in a test */ + /* without a metadata service. */ + /***************************************************************************/ + rc = openstack_metadata(verbosity); + if (rc != EVEL_SUCCESS) + { + EVEL_INFO("Failed to load OpenStack metadata - assuming test environment"); + rc = EVEL_SUCCESS; + } + + /***************************************************************************/ + /* Start the event handler thread. */ + /***************************************************************************/ + rc = event_handler_run(); + if (rc != EVEL_SUCCESS) + { + log_error_state("Failed to start event handler thread. " + "Error code=%d", rc); + goto exit_label; + } + +exit_label: + return(rc); +} + +/**************************************************************************//** + * Clean up the EVEL library. + * + * @note that at present don't expect Init/Term cycling not to leak memory! + * + * @returns Status code + * @retval EVEL_SUCCESS On success + * @retval "One of ::EVEL_ERR_CODES" On failure. + *****************************************************************************/ +EVEL_ERR_CODES evel_terminate(void) +{ + int rc = EVEL_SUCCESS; + + /***************************************************************************/ + /* First terminate any pending transactions in the event-posting thread. */ + /***************************************************************************/ + rc = event_handler_terminate(); + if (rc != EVEL_SUCCESS) + { + log_error_state("Failed to terminate EVEL library cleanly!"); + } + + /***************************************************************************/ + /* Shut down the Event Handler library in a tidy manner. */ + /***************************************************************************/ + curl_global_cleanup(); + + /***************************************************************************/ + /* Clean up allocated memory. */ + /***************************************************************************/ + free(functional_role); + + /***************************************************************************/ + /* Clean up event throttling. */ + /***************************************************************************/ + evel_throttle_terminate(); + + EVEL_INFO("EVEL stopped"); + return(rc); +} + +/**************************************************************************//** + * Free an event. + * + * Free off the event supplied. Will free all the contained allocated memory. + * + * @note It is safe to free a NULL pointer. + *****************************************************************************/ +void evel_free_event(void * event) +{ + EVENT_HEADER * evt_ptr = event; + EVEL_ENTER(); + + if (event != NULL) + { + /*************************************************************************/ + /* Work out what kind of event we're dealing with so we can cast it */ + /* appropriately. */ + /*************************************************************************/ + switch (evt_ptr->event_domain) + { + case EVEL_DOMAIN_INTERNAL: + EVEL_DEBUG("Event is an Internal event at %lp", evt_ptr); + evel_free_internal_event((EVENT_INTERNAL *) evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_INTERNAL)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_HEARTBEAT: + EVEL_DEBUG("Event is a Heartbeat at %lp", evt_ptr); + evel_free_header(evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_HEADER)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_FAULT: + EVEL_DEBUG("Event is a Fault at %lp", evt_ptr); + evel_free_fault((EVENT_FAULT *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_FAULT)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_MEASUREMENT: + EVEL_DEBUG("Event is a Measurement at %lp", evt_ptr); + evel_free_measurement((EVENT_MEASUREMENT *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_MEASUREMENT)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_MOBILE_FLOW: + EVEL_DEBUG("Event is a Mobile Flow at %lp", evt_ptr); + evel_free_mobile_flow((EVENT_MOBILE_FLOW *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_MOBILE_FLOW)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_REPORT: + EVEL_DEBUG("Event is a Report at %lp", evt_ptr); + evel_free_report((EVENT_REPORT *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_REPORT)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_SERVICE: + EVEL_DEBUG("Event is a Service Event at %lp", evt_ptr); + evel_free_service((EVENT_SERVICE *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_SERVICE)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_SIGNALING: + EVEL_DEBUG("Event is a Signaling at %lp", evt_ptr); + evel_free_signaling((EVENT_SIGNALING *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_SIGNALING)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_STATE_CHANGE: + EVEL_DEBUG("Event is a State Change at %lp", evt_ptr); + evel_free_state_change((EVENT_STATE_CHANGE *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_STATE_CHANGE)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_SYSLOG: + EVEL_DEBUG("Event is a Syslog at %lp", evt_ptr); + evel_free_syslog((EVENT_SYSLOG *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_SYSLOG)); + free(evt_ptr); + break; + + case EVEL_DOMAIN_OTHER: + EVEL_DEBUG("Event is an Other at %lp", evt_ptr); + evel_free_other((EVENT_OTHER *)evt_ptr); + memset(evt_ptr, 0, sizeof(EVENT_OTHER)); + free(evt_ptr); + break; + + default: + EVEL_ERROR("Unexpected event domain (%d)", evt_ptr->event_domain); + assert(0); + } + } + EVEL_EXIT(); +} |