diff options
Diffstat (limited to 'fluent-bit/plugins/in_tcp/tcp.c')
| -rw-r--r-- | fluent-bit/plugins/in_tcp/tcp.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/fluent-bit/plugins/in_tcp/tcp.c b/fluent-bit/plugins/in_tcp/tcp.c new file mode 100644 index 000000000..084ea6887 --- /dev/null +++ b/fluent-bit/plugins/in_tcp/tcp.c @@ -0,0 +1,184 @@ +/* -*- 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_network.h> +#include <msgpack.h> + +#include "tcp.h" +#include "tcp_conn.h" +#include "tcp_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_tcp_collect(struct flb_input_instance *in, + struct flb_config *config, void *in_context) +{ + struct flb_connection *connection; + struct tcp_conn *conn; + struct flb_in_tcp_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_trace(ctx->ins, "new TCP connection arrived FD=%i", connection->fd); + + conn = tcp_conn_add(connection, ctx); + + if (conn == NULL) { + flb_plg_error(ctx->ins, "could not accept new connection"); + + flb_downstream_conn_release(connection); + + return -1; + } + + return 0; +} + +/* Initialize plugin */ +static int in_tcp_init(struct flb_input_instance *in, + struct flb_config *config, void *data) +{ + unsigned short int port; + int ret; + struct flb_in_tcp_config *ctx; + + (void) data; + + /* Allocate space for the configuration */ + ctx = tcp_config_init(in); + if (!ctx) { + return -1; + } + ctx->collector_id = -1; + ctx->ins = in; + mk_list_init(&ctx->connections); + + /* Set the context */ + flb_input_set_context(in, ctx); + + 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); + + tcp_config_destroy(ctx); + + return -1; + } + + flb_input_downstream_set(ctx->downstream, ctx->ins); + + /* Collect upon data available on the standard input */ + ret = flb_input_set_collector_socket(in, + in_tcp_collect, + ctx->downstream->server_fd, + config); + if (ret == -1) { + flb_plg_error(ctx->ins, "Could not set collector for IN_TCP input plugin"); + tcp_config_destroy(ctx); + + return -1; + } + + ctx->collector_id = ret; + + return 0; +} + +static int in_tcp_exit(void *data, struct flb_config *config) +{ + struct mk_list *tmp; + struct mk_list *head; + struct flb_in_tcp_config *ctx; + struct tcp_conn *conn; + + (void) *config; + + ctx = data; + + mk_list_foreach_safe(head, tmp, &ctx->connections) { + conn = mk_list_entry(head, struct tcp_conn, _head); + + tcp_conn_del(conn); + } + + tcp_config_destroy(ctx); + + return 0; +} + +static struct flb_config_map config_map[] = { + { + FLB_CONFIG_MAP_STR, "format", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_in_tcp_config, format_name), + "Set the format: json or none" + }, + { + FLB_CONFIG_MAP_STR, "separator", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_in_tcp_config, raw_separator), + "Set separator" + }, + { + FLB_CONFIG_MAP_STR, "chunk_size", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_in_tcp_config, chunk_size_str), + "Set the chunk size" + }, + { + FLB_CONFIG_MAP_STR, "buffer_size", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_in_tcp_config, buffer_size_str), + "Set the buffer size" + }, + /* EOF */ + {0} +}; + +/* Plugin reference */ +struct flb_input_plugin in_tcp_plugin = { + .name = "tcp", + .description = "TCP", + .cb_init = in_tcp_init, + .cb_pre_run = NULL, + .cb_collect = in_tcp_collect, + .cb_flush_buf = NULL, + .cb_exit = in_tcp_exit, + .config_map = config_map, + .flags = FLB_INPUT_NET_SERVER | FLB_IO_OPT_TLS +}; |