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/* -*- 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_plugin.h>
#include <fluent-bit/flb_downstream.h>
#include <fluent-bit/flb_network.h>
#include <fluent-bit/flb_config.h>
#include "http_conn.h"
#include "opentelemetry.h"
#include "opentelemetry_config.h"
/*
* For a server event, the collection event means a new client have arrived, we
* accept the connection and create a new TCP instance which will wait for
* JSON map messages.
*/
static int in_opentelemetry_collect(struct flb_input_instance *ins,
struct flb_config *config, void *in_context)
{
struct flb_connection *connection;
struct http_conn *conn;
struct flb_opentelemetry *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_trace(ctx->ins, "new TCP connection arrived FD=%i", connection->fd);
conn = opentelemetry_conn_add(connection, ctx);
if (conn == NULL) {
return -1;
}
return 0;
}
static int in_opentelemetry_init(struct flb_input_instance *ins,
struct flb_config *config, void *data)
{
unsigned short int port;
int ret;
struct flb_opentelemetry *ctx;
(void) data;
/* Create context and basic conf */
ctx = opentelemetry_config_create(ins);
if (!ctx) {
return -1;
}
ctx->collector_id = -1;
/* Populate context with config map defaults and incoming properties */
ret = flb_input_config_map_set(ins, (void *) ctx);
if (ret == -1) {
flb_plg_error(ctx->ins, "configuration error");
opentelemetry_config_destroy(ctx);
return -1;
}
/* Set the context */
flb_input_set_context(ins, ctx);
port = (unsigned short int) strtoul(ctx->tcp_port, NULL, 10);
ctx->downstream = flb_downstream_create(FLB_TRANSPORT_TCP,
ins->flags,
ctx->listen,
port,
ins->tls,
config,
&ins->net_setup);
if (ctx->downstream == NULL) {
flb_plg_error(ctx->ins,
"could not initialize downstream on %s:%s. Aborting",
ctx->listen, ctx->tcp_port);
opentelemetry_config_destroy(ctx);
return -1;
}
flb_input_downstream_set(ctx->downstream, ctx->ins);
flb_plg_info(ctx->ins, "listening on %s:%s", ctx->listen, ctx->tcp_port);
if (ctx->successful_response_code != 200 &&
ctx->successful_response_code != 201 &&
ctx->successful_response_code != 204) {
flb_plg_error(ctx->ins, "%d is not supported response code. Use default 201",
ctx->successful_response_code);
ctx->successful_response_code = 201;
}
/* Collect upon data available on the standard input */
ret = flb_input_set_collector_socket(ins,
in_opentelemetry_collect,
ctx->downstream->server_fd,
config);
if (ret == -1) {
flb_plg_error(ctx->ins, "Could not set collector for IN_TCP input plugin");
opentelemetry_config_destroy(ctx);
return -1;
}
ctx->collector_id = ret;
return 0;
}
static int in_opentelemetry_exit(void *data, struct flb_config *config)
{
struct flb_opentelemetry *ctx;
(void) config;
ctx = data;
if (ctx != NULL) {
opentelemetry_config_destroy(ctx);
}
return 0;
}
/* Configuration properties map */
static struct flb_config_map config_map[] = {
{
FLB_CONFIG_MAP_SIZE, "buffer_max_size", HTTP_BUFFER_MAX_SIZE,
0, FLB_TRUE, offsetof(struct flb_opentelemetry, buffer_max_size),
""
},
{
FLB_CONFIG_MAP_SIZE, "buffer_chunk_size", HTTP_BUFFER_CHUNK_SIZE,
0, FLB_TRUE, offsetof(struct flb_opentelemetry, buffer_chunk_size),
""
},
{
FLB_CONFIG_MAP_STR, "tag_key", NULL,
0, FLB_TRUE, offsetof(struct flb_opentelemetry, tag_key),
""
},
{
FLB_CONFIG_MAP_INT, "successful_response_code", "201",
0, FLB_TRUE, offsetof(struct flb_opentelemetry, successful_response_code),
"Set successful response code. 200, 201 and 204 are supported."
},
{
FLB_CONFIG_MAP_BOOL, "raw_traces", "false",
0, FLB_TRUE, offsetof(struct flb_opentelemetry, raw_traces),
"Forward traces without processing"
},
/* EOF */
{0}
};
/* Plugin reference */
struct flb_input_plugin in_opentelemetry_plugin = {
.name = "opentelemetry",
.description = "OpenTelemetry",
.cb_init = in_opentelemetry_init,
.cb_pre_run = NULL,
.cb_collect = in_opentelemetry_collect,
.cb_flush_buf = NULL,
.cb_pause = NULL,
.cb_resume = NULL,
.cb_exit = in_opentelemetry_exit,
.config_map = config_map,
.flags = FLB_INPUT_NET_SERVER | FLB_IO_OPT_TLS
};
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