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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_syslog/syslog.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_syslog/syslog.c')
-rw-r--r-- | src/fluent-bit/plugins/in_syslog/syslog.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/in_syslog/syslog.c b/src/fluent-bit/plugins/in_syslog/syslog.c new file mode 100644 index 000000000..d478dfc3f --- /dev/null +++ b/src/fluent-bit/plugins/in_syslog/syslog.c @@ -0,0 +1,263 @@ +/* -*- 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 <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#include <msgpack.h> +#include <fluent-bit/flb_input_plugin.h> +#include <fluent-bit/flb_downstream.h> +#include <fluent-bit/flb_config.h> +#include <fluent-bit/flb_error.h> +#include <fluent-bit/flb_utils.h> + +#include "syslog.h" +#include "syslog_conf.h" +#include "syslog_server.h" +#include "syslog_conn.h" +#include "syslog_prot.h" + +/* cb_collect callback */ +static int in_syslog_collect_tcp(struct flb_input_instance *i_ins, + struct flb_config *config, void *in_context) +{ + struct flb_connection *connection; + struct syslog_conn *conn; + struct flb_syslog *ctx; + + (void) i_ins; + + 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; + } + + if (ctx->dgram_mode_flag) { + return syslog_dgram_conn_event(connection); + } + else { + flb_plg_trace(ctx->ins, "new Unix connection arrived FD=%i", connection->fd); + + conn = syslog_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; +} + +/* + * Collect a datagram, per Syslog specification a datagram contains only + * one syslog message and it should not exceed 1KB. + */ +static int in_syslog_collect_udp(struct flb_input_instance *i_ins, + struct flb_config *config, + void *in_context) +{ + struct flb_syslog *ctx; + + (void) i_ins; + + ctx = in_context; + + return syslog_dgram_conn_event(ctx->dummy_conn->connection); +} + +/* Initialize plugin */ +static int in_syslog_init(struct flb_input_instance *in, + struct flb_config *config, void *data) +{ + int ret; + struct flb_syslog *ctx; + struct flb_connection *connection; + + /* Allocate space for the configuration */ + ctx = syslog_conf_create(in, config); + if (!ctx) { + flb_plg_error(in, "could not initialize plugin"); + return -1; + } + ctx->collector_id = -1; + + if ((ctx->mode == FLB_SYSLOG_UNIX_TCP || ctx->mode == FLB_SYSLOG_UNIX_UDP) + && !ctx->unix_path) { + flb_plg_error(ctx->ins, "Unix path not defined"); + syslog_conf_destroy(ctx); + return -1; + } + + /* Create Unix Socket */ + ret = syslog_server_create(ctx); + if (ret == -1) { + syslog_conf_destroy(ctx); + return -1; + } + + flb_input_downstream_set(ctx->downstream, ctx->ins); + + if (ctx->dgram_mode_flag) { + connection = flb_downstream_conn_get(ctx->downstream); + + if (connection == NULL) { + flb_plg_error(ctx->ins, "could not get DGRAM server dummy " + "connection"); + + syslog_conf_destroy(ctx); + + return -1; + } + + ctx->dummy_conn = syslog_conn_add(connection, ctx); + + if (ctx->dummy_conn == NULL) { + flb_plg_error(ctx->ins, "could not track DGRAM server dummy " + "connection"); + + syslog_conf_destroy(ctx); + + return -1; + } + } + + /* Set context */ + flb_input_set_context(in, ctx); + + /* Collect events for every opened connection to our socket */ + if (ctx->mode == FLB_SYSLOG_UNIX_TCP || + ctx->mode == FLB_SYSLOG_TCP) { + ret = flb_input_set_collector_socket(in, + in_syslog_collect_tcp, + ctx->downstream->server_fd, + config); + } + else { + ret = flb_input_set_collector_socket(in, + in_syslog_collect_udp, + ctx->downstream->server_fd, + config); + } + + if (ret == -1) { + flb_plg_error(ctx->ins, "Could not set collector"); + syslog_conf_destroy(ctx); + + return -1; + } + + ctx->collector_id = ret; + ctx->collector_event = flb_input_collector_get_event(ret, in); + + if (ret == -1) { + flb_plg_error(ctx->ins, "Could not get collector event"); + syslog_conf_destroy(ctx); + + return -1; + } + + return 0; +} + +static int in_syslog_exit(void *data, struct flb_config *config) +{ + struct flb_syslog *ctx = data; + (void) config; + + syslog_conn_exit(ctx); + syslog_conf_destroy(ctx); + + return 0; +} + +static struct flb_config_map config_map[] = { + { + FLB_CONFIG_MAP_STR, "mode", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, mode_str), + "Set the socket mode: unix_tcp, unix_udp, tcp or udp" + }, + { + FLB_CONFIG_MAP_STR, "path", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, unix_path), + "Set the path for the UNIX socket" + }, + { + FLB_CONFIG_MAP_STR, "unix_perm", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, unix_perm_str), + "Set the permissions for the UNIX socket" + }, + { + FLB_CONFIG_MAP_SIZE, "buffer_chunk_size", FLB_SYSLOG_CHUNK, + 0, FLB_TRUE, offsetof(struct flb_syslog, buffer_chunk_size), + "Set the buffer chunk size" + }, + { + FLB_CONFIG_MAP_SIZE, "buffer_max_size", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, buffer_max_size), + "Set the buffer chunk size" + }, + { + FLB_CONFIG_MAP_STR, "parser", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, parser_name), + "Set the parser" + }, + { + FLB_CONFIG_MAP_SIZE, "receive_buffer_size", (char *)NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, receive_buffer_size), + "Set the socket receiving buffer size" + }, + { + FLB_CONFIG_MAP_STR, "raw_message_key", (char *) NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, raw_message_key), + "Key where the raw message will be preserved" + }, + { + FLB_CONFIG_MAP_STR, "source_address_key", (char *) NULL, + 0, FLB_TRUE, offsetof(struct flb_syslog, source_address_key), + "Key where the source address will be injected" + }, + + + /* EOF */ + {0} +}; + +struct flb_input_plugin in_syslog_plugin = { + .name = "syslog", + .description = "Syslog", + .cb_init = in_syslog_init, + .cb_pre_run = NULL, + .cb_collect = NULL, + .cb_flush_buf = NULL, + .cb_exit = in_syslog_exit, + .config_map = config_map, + .flags = FLB_INPUT_NET_SERVER | FLB_IO_OPT_TLS +}; |