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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 12:08:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 12:08:18 +0000 |
commit | 5da14042f70711ea5cf66e034699730335462f66 (patch) | |
tree | 0f6354ccac934ed87a2d555f45be4c831cf92f4a /src/fluent-bit/plugins/in_mqtt/mqtt.c | |
parent | Releasing debian version 1.44.3-2. (diff) | |
download | netdata-5da14042f70711ea5cf66e034699730335462f66.tar.xz netdata-5da14042f70711ea5cf66e034699730335462f66.zip |
Merging upstream version 1.45.3+dfsg.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/fluent-bit/plugins/in_mqtt/mqtt.c')
-rw-r--r-- | src/fluent-bit/plugins/in_mqtt/mqtt.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/in_mqtt/mqtt.c b/src/fluent-bit/plugins/in_mqtt/mqtt.c new file mode 100644 index 000000000..d1ae74f1e --- /dev/null +++ b/src/fluent-bit/plugins/in_mqtt/mqtt.c @@ -0,0 +1,162 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ + +/* Fluent Bit + * ========== + * Copyright (C) 2015-2022 The Fluent Bit Authors + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <fluent-bit/flb_input.h> +#include <fluent-bit/flb_input_plugin.h> +#include <fluent-bit/flb_utils.h> +#include <fluent-bit/flb_network.h> +#include <fluent-bit/flb_downstream.h> +#include <fluent-bit/flb_config_map.h> + +#include "mqtt.h" +#include "mqtt_conn.h" +#include "mqtt_config.h" + +/* Initialize plugin */ +static int in_mqtt_init(struct flb_input_instance *in, + struct flb_config *config, void *data) +{ + unsigned short int port; + int ret; + struct flb_in_mqtt_config *ctx; + + (void) data; + + /* Allocate space for the configuration */ + ctx = mqtt_config_init(in); + if (!ctx) { + return -1; + } + ctx->ins = in; + ctx->msgp_len = 0; + + /* Set the context */ + flb_input_set_context(in, ctx); + + /* Create downstream */ + port = (unsigned short int) strtoul(ctx->tcp_port, NULL, 10); + + ctx->downstream = flb_downstream_create(FLB_TRANSPORT_TCP, + in->flags, + ctx->listen, + port, + in->tls, + config, + &in->net_setup); + + if (ctx->downstream == NULL) { + flb_plg_error(ctx->ins, + "could not initialize downstream on %s:%s. Aborting", + ctx->listen, ctx->tcp_port); + + mqtt_config_free(ctx); + + return -1; + } + + flb_input_downstream_set(ctx->downstream, ctx->ins); + + /* Collect upon data available on the standard input */ + ret = flb_input_set_collector_event(in, + in_mqtt_collect, + ctx->downstream->server_fd, + config); + if (ret == -1) { + flb_plg_error(ctx->ins, "could not set collector for MQTT input plugin"); + mqtt_config_free(ctx); + return -1; + } + + return 0; +} + +/* + * For a server event, the collection event means a new client have arrived, we + * accept the connection and create a new MQTT instance which will wait for + * events/data (MQTT control packages) + */ +int in_mqtt_collect(struct flb_input_instance *ins, + struct flb_config *config, void *in_context) +{ + struct flb_connection *connection; + struct mqtt_conn *conn; + struct flb_in_mqtt_config *ctx; + + ctx = in_context; + + connection = flb_downstream_conn_get(ctx->downstream); + + if (connection == NULL) { + flb_plg_error(ctx->ins, "could not accept new connection"); + + return -1; + } + + flb_plg_debug(ctx->ins, "[fd=%i] new TCP connection", connection->fd); + + conn = mqtt_conn_add(connection, ctx); + + if (!conn) { + flb_downstream_conn_release(connection); + + return -1; + } + + return 0; +} + +static int in_mqtt_exit(void *data, struct flb_config *config) +{ + (void) *config; + struct flb_in_mqtt_config *ctx = data; + + if (!ctx) { + return 0; + } + + mqtt_conn_destroy_all(ctx); + + mqtt_config_free(ctx); + + return 0; +} + +/* Configuration properties map */ +static struct flb_config_map config_map[] = { + { + FLB_CONFIG_MAP_STR, "payload_key", NULL, + 0, FLB_TRUE, offsetof(struct flb_in_mqtt_config, payload_key), + "Key where the payload will be preserved" + }, + /* EOF */ + {0} +}; + +/* Plugin reference */ +struct flb_input_plugin in_mqtt_plugin = { + .name = "mqtt", + .description = "MQTT, listen for Publish messages", + .cb_init = in_mqtt_init, + .cb_pre_run = NULL, + .cb_collect = in_mqtt_collect, + .cb_flush_buf = NULL, + .cb_exit = in_mqtt_exit, + .config_map = config_map, + .flags = FLB_INPUT_NET_SERVER | FLB_IO_OPT_TLS +}; |