+static int gen_message_payload(int state, int old_state, const char *interface,
+ long long unsigned int timestamp, char **buf) {
+ const unsigned char *buf2;
+ yajl_gen g;
+
+#if !defined(HAVE_YAJL_V2)
+ yajl_gen_config conf = {};
+
+ conf.beautify = 0;
+#endif
+
+#if HAVE_YAJL_V2
+ size_t len;
+ g = yajl_gen_alloc(NULL);
+ yajl_gen_config(g, yajl_gen_beautify, 0);
+#else
+ unsigned int len;
+ g = yajl_gen_alloc(&conf, NULL);
+#endif
+
+ yajl_gen_clear(g);
+
+ // *** BEGIN common event header ***
+
+ if (yajl_gen_map_open(g) != yajl_gen_status_ok)
+ goto err;
+
+ // domain
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_DOMAIN_FIELD,
+ strlen(CONNECTIVITY_DOMAIN_FIELD)) != yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_DOMAIN_VALUE,
+ strlen(CONNECTIVITY_DOMAIN_VALUE)) != yajl_gen_status_ok)
+ goto err;
+
+ // eventId
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_EVENT_ID_FIELD,
+ strlen(CONNECTIVITY_EVENT_ID_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ event_id = event_id + 1;
+ int event_id_len = sizeof(char) * sizeof(int) * 4 + 1;
+ char *event_id_str = malloc(event_id_len);
+ snprintf(event_id_str, event_id_len, "%d", event_id);
+
+ if (yajl_gen_number(g, event_id_str, strlen(event_id_str)) !=
+ yajl_gen_status_ok) {
+ sfree(event_id_str);
+ goto err;
+ }
+
+ sfree(event_id_str);
+
+ // eventName
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_EVENT_NAME_FIELD,
+ strlen(CONNECTIVITY_EVENT_NAME_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ int event_name_len = 0;
+ event_name_len = event_name_len + strlen(interface); // interface name
+ event_name_len = event_name_len + (state == 0 ? 4 : 2); // "down" or "up"
+ event_name_len =
+ event_name_len + 12; // "interface", 2 spaces and null-terminator
+ char *event_name_str = malloc(event_name_len);
+ memset(event_name_str, '\0', event_name_len);
+ snprintf(event_name_str, event_name_len, "interface %s %s", interface,
+ (state == 0 ? CONNECTIVITY_EVENT_NAME_DOWN_VALUE
+ : CONNECTIVITY_EVENT_NAME_UP_VALUE));
+
+ if (yajl_gen_string(g, (u_char *)event_name_str, strlen(event_name_str)) !=
+ yajl_gen_status_ok) {
+ sfree(event_name_str);
+ goto err;
+ }
+
+ sfree(event_name_str);
+
+ // lastEpochMicrosec
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_LAST_EPOCH_MICROSEC_FIELD,
+ strlen(CONNECTIVITY_LAST_EPOCH_MICROSEC_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ int last_epoch_microsec_len =
+ sizeof(char) * sizeof(long long unsigned int) * 4 + 1;
+ char *last_epoch_microsec_str = malloc(last_epoch_microsec_len);
+ snprintf(last_epoch_microsec_str, last_epoch_microsec_len, "%llu",
+ (long long unsigned int)CDTIME_T_TO_US(cdtime()));
+
+ if (yajl_gen_number(g, last_epoch_microsec_str,
+ strlen(last_epoch_microsec_str)) != yajl_gen_status_ok) {
+ sfree(last_epoch_microsec_str);
+ goto err;
+ }
+
+ sfree(last_epoch_microsec_str);
+
+ // priority
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_PRIORITY_FIELD,
+ strlen(CONNECTIVITY_PRIORITY_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_PRIORITY_VALUE,
+ strlen(CONNECTIVITY_PRIORITY_VALUE)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ // reportingEntityName
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_REPORTING_ENTITY_NAME_FIELD,
+ strlen(CONNECTIVITY_REPORTING_ENTITY_NAME_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_REPORTING_ENTITY_NAME_VALUE,
+ strlen(CONNECTIVITY_REPORTING_ENTITY_NAME_VALUE)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ // sequence
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_SEQUENCE_FIELD,
+ strlen(CONNECTIVITY_SEQUENCE_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_number(g, CONNECTIVITY_SEQUENCE_VALUE,
+ strlen(CONNECTIVITY_SEQUENCE_VALUE)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ // sourceName
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_SOURCE_NAME_FIELD,
+ strlen(CONNECTIVITY_SOURCE_NAME_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_string(g, (u_char *)interface, strlen(interface)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ // startEpochMicrosec
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_START_EPOCH_MICROSEC_FIELD,
+ strlen(CONNECTIVITY_START_EPOCH_MICROSEC_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ int start_epoch_microsec_len =
+ sizeof(char) * sizeof(long long unsigned int) * 4 + 1;
+ char *start_epoch_microsec_str = malloc(start_epoch_microsec_len);
+ snprintf(start_epoch_microsec_str, start_epoch_microsec_len, "%llu",
+ (long long unsigned int)timestamp);
+
+ if (yajl_gen_number(g, start_epoch_microsec_str,
+ strlen(start_epoch_microsec_str)) != yajl_gen_status_ok) {
+ sfree(start_epoch_microsec_str);
+ goto err;
+ }
+
+ sfree(start_epoch_microsec_str);
+
+ // version
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_VERSION_FIELD,
+ strlen(CONNECTIVITY_VERSION_FIELD)) != yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_number(g, CONNECTIVITY_VERSION_VALUE,
+ strlen(CONNECTIVITY_VERSION_VALUE)) != yajl_gen_status_ok)
+ goto err;
+
+ // *** END common event header ***
+
+ // *** BEGIN state change fields ***
+
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_STATE_CHANGE_FIELDS_FIELD,
+ strlen(CONNECTIVITY_STATE_CHANGE_FIELDS_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_map_open(g) != yajl_gen_status_ok)
+ goto err;
+
+ // newState
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_NEW_STATE_FIELD,
+ strlen(CONNECTIVITY_NEW_STATE_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ int new_state_len =
+ (state == 0 ? strlen(CONNECTIVITY_NEW_STATE_FIELD_DOWN_VALUE)
+ : strlen(CONNECTIVITY_NEW_STATE_FIELD_UP_VALUE));
+
+ if (yajl_gen_string(
+ g, (u_char *)(state == 0 ? CONNECTIVITY_NEW_STATE_FIELD_DOWN_VALUE
+ : CONNECTIVITY_NEW_STATE_FIELD_UP_VALUE),
+ new_state_len) != yajl_gen_status_ok)
+ goto err;
+
+ // oldState
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_OLD_STATE_FIELD,
+ strlen(CONNECTIVITY_OLD_STATE_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ int old_state_len =
+ (old_state == 0 ? strlen(CONNECTIVITY_OLD_STATE_FIELD_DOWN_VALUE)
+ : strlen(CONNECTIVITY_OLD_STATE_FIELD_UP_VALUE));
+
+ if (yajl_gen_string(
+ g, (u_char *)(old_state == 0 ? CONNECTIVITY_OLD_STATE_FIELD_DOWN_VALUE
+ : CONNECTIVITY_OLD_STATE_FIELD_UP_VALUE),
+ old_state_len) != yajl_gen_status_ok)
+ goto err;
+
+ // stateChangeFieldsVersion
+ if (yajl_gen_string(g,
+ (u_char *)CONNECTIVITY_STATE_CHANGE_FIELDS_VERSION_FIELD,
+ strlen(CONNECTIVITY_STATE_CHANGE_FIELDS_VERSION_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_number(g, CONNECTIVITY_STATE_CHANGE_FIELDS_VERSION_VALUE,
+ strlen(CONNECTIVITY_STATE_CHANGE_FIELDS_VERSION_VALUE)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ // stateInterface
+ if (yajl_gen_string(g, (u_char *)CONNECTIVITY_STATE_INTERFACE_FIELD,
+ strlen(CONNECTIVITY_STATE_INTERFACE_FIELD)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_string(g, (u_char *)interface, strlen(interface)) !=
+ yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_map_close(g) != yajl_gen_status_ok)
+ goto err;
+
+ // *** END state change fields ***
+
+ if (yajl_gen_map_close(g) != yajl_gen_status_ok)
+ goto err;
+
+ if (yajl_gen_get_buf(g, &buf2, &len) != yajl_gen_status_ok)
+ goto err;
+
+ *buf = malloc(strlen((char *)buf2) + 1);
+
+ sstrncpy(*buf, (char *)buf2, strlen((char *)buf2) + 1);
+
+ yajl_gen_free(g);
+
+ return 0;
+
+err:
+ yajl_gen_free(g);
+ ERROR("connectivity plugin: gen_message_payload failed to generate JSON");
+ return -1;
+}
+