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-rw-r--r--fluent-bit/plugins/out_udp/udp.c351
1 files changed, 351 insertions, 0 deletions
diff --git a/fluent-bit/plugins/out_udp/udp.c b/fluent-bit/plugins/out_udp/udp.c
new file mode 100644
index 00000000..8e0044bf
--- /dev/null
+++ b/fluent-bit/plugins/out_udp/udp.c
@@ -0,0 +1,351 @@
+/* -*- 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_output_plugin.h>
+#include <fluent-bit/flb_pack.h>
+#include <fluent-bit/flb_str.h>
+#include <fluent-bit/flb_time.h>
+#include <fluent-bit/flb_utils.h>
+#include <fluent-bit/flb_pack.h>
+#include <fluent-bit/flb_sds.h>
+#include <fluent-bit/flb_config_map.h>
+#include <fluent-bit/flb_log_event_decoder.h>
+#include <msgpack.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "udp.h"
+#include "udp_conf.h"
+
+static int cb_udp_init(struct flb_output_instance *ins,
+ struct flb_config *config, void *data)
+{
+ struct flb_out_udp *ctx = NULL;
+ (void) data;
+
+ ctx = flb_udp_conf_create(ins, config);
+ if (!ctx) {
+ return -1;
+ }
+
+ /* Set the plugin context */
+ flb_output_set_context(ins, ctx);
+
+ return 0;
+}
+
+static int deliver_chunks_raw(struct flb_out_udp *ctx,
+ const char *tag, int tag_len,
+ const void *in_data, size_t in_size)
+{
+ int ret;
+ flb_sds_t buf = NULL;
+ flb_sds_t str;
+ msgpack_object map;
+ ssize_t send_result;
+ struct flb_log_event_decoder log_decoder;
+ struct flb_log_event log_event;
+
+ buf = flb_sds_create_size(in_size);
+ if (!buf) {
+ return FLB_ERROR;
+ }
+
+ ret = flb_log_event_decoder_init(&log_decoder, (char *) in_data, in_size);
+
+ if (ret != FLB_EVENT_DECODER_SUCCESS) {
+ flb_plg_error(ctx->ins,
+ "Log event decoder initialization error : %d", ret);
+
+ flb_sds_destroy(buf);
+
+ return -1;
+ }
+
+ while ((ret = flb_log_event_decoder_next(
+ &log_decoder,
+ &log_event)) == FLB_EVENT_DECODER_SUCCESS) {
+ map = *log_event.body;
+
+ str = flb_ra_translate(ctx->ra_raw_message_key, (char *) tag, tag_len, map, NULL);
+ if (!str) {
+ continue;
+ }
+
+ ret = flb_sds_cat_safe(&buf, str, flb_sds_len(str));
+ if (ret != 0) {
+ flb_plg_error(ctx->ins, "failed to compose payload from '%s'", str);
+ }
+ flb_sds_destroy(str);
+
+ /* append a new line */
+ flb_sds_cat_safe(&buf, "\n", 1);
+
+ if (flb_sds_len(buf) > 65535) {
+ flb_plg_debug(ctx->ins, "record size exceeds maximum datagram size : %zu", flb_sds_len(buf));
+ }
+
+ send_result = send(ctx->endpoint_descriptor,
+ buf,
+ flb_sds_len(buf),
+ 0);
+
+ if (send_result == -1) {
+ flb_log_event_decoder_destroy(&log_decoder);
+ flb_sds_destroy(buf);
+
+ return FLB_RETRY;
+ }
+
+ flb_sds_len_set(buf, 0);
+ buf[0] = '\0';
+ }
+
+ flb_log_event_decoder_destroy(&log_decoder);
+ flb_sds_destroy(buf);
+
+ return FLB_OK;
+}
+
+static int deliver_chunks_json(struct flb_out_udp *ctx,
+ const char *tag, int tag_len,
+ const void *in_data, size_t in_size)
+{
+ int ret;
+ size_t off = 0;
+ flb_sds_t json = NULL;
+ ssize_t send_result;
+ size_t previous_offset;
+ int append_new_line;
+ struct flb_log_event_decoder log_decoder;
+ struct flb_log_event log_event;
+
+ ret = flb_log_event_decoder_init(&log_decoder, (char *) in_data, in_size);
+
+ if (ret != FLB_EVENT_DECODER_SUCCESS) {
+ flb_plg_error(ctx->ins,
+ "Log event decoder initialization error : %d", ret);
+
+ return FLB_ERROR;
+ }
+
+ previous_offset = 0;
+
+ while ((ret = flb_log_event_decoder_next(
+ &log_decoder,
+ &log_event)) == FLB_EVENT_DECODER_SUCCESS) {
+ off = log_decoder.offset;
+
+ json = flb_pack_msgpack_to_json_format(&((char *) in_data)[previous_offset],
+ off - previous_offset,
+ ctx->out_format,
+ ctx->json_date_format,
+ ctx->date_key);
+ if (!json) {
+ flb_plg_error(ctx->ins, "error formatting JSON payload");
+
+ flb_log_event_decoder_destroy(&log_decoder);
+
+ return FLB_ERROR;
+ }
+
+ previous_offset = off;
+ append_new_line = FLB_FALSE;
+
+ if (flb_sds_len(json) > 0) {
+ if (json[flb_sds_len(json) - 1] != '\n') {
+ append_new_line = FLB_TRUE;
+ }
+
+ if (append_new_line) {
+ ret = flb_sds_cat_safe(&json, "\n", 1);
+
+ if (ret != 0) {
+ flb_log_event_decoder_destroy(&log_decoder);
+ flb_sds_destroy(json);
+
+ return FLB_RETRY;
+ }
+ }
+
+ if (flb_sds_len(json) > 65535) {
+ flb_plg_debug(ctx->ins, "record size exceeds maximum datagram size : %zu", flb_sds_len(json));
+ }
+
+ send_result = send(ctx->endpoint_descriptor,
+ json,
+ flb_sds_len(json),
+ 0);
+
+ if (send_result == -1) {
+ flb_log_event_decoder_destroy(&log_decoder);
+ flb_sds_destroy(json);
+
+ return FLB_RETRY;
+ }
+ }
+
+ flb_sds_destroy(json);
+ }
+
+ flb_log_event_decoder_destroy(&log_decoder);
+
+ return FLB_OK;
+}
+
+static int deliver_chunks_msgpack(struct flb_out_udp *ctx,
+ const char *tag, int tag_len,
+ const void *in_data, size_t in_size)
+{
+ size_t off = 0;
+ ssize_t send_result;
+ size_t previous_offset;
+ struct flb_log_event_decoder log_decoder;
+ struct flb_log_event log_event;
+ int ret;
+
+ ret = flb_log_event_decoder_init(&log_decoder, (char *) in_data, in_size);
+
+ if (ret != FLB_EVENT_DECODER_SUCCESS) {
+ flb_plg_error(ctx->ins,
+ "Log event decoder initialization error : %d", ret);
+
+ return FLB_RETRY;
+ }
+
+ previous_offset = 0;
+
+ while ((ret = flb_log_event_decoder_next(
+ &log_decoder,
+ &log_event)) == FLB_EVENT_DECODER_SUCCESS) {
+ off = log_decoder.offset;
+
+ if ((off - previous_offset) > 65535) {
+ flb_plg_debug(ctx->ins, "record size exceeds maximum datagram size : %zu", (off - previous_offset));
+ }
+
+ send_result = send(ctx->endpoint_descriptor,
+ &((char *) in_data)[previous_offset],
+ off - previous_offset,
+ 0);
+
+ if (send_result == -1) {
+ flb_log_event_decoder_destroy(&log_decoder);
+
+ return FLB_RETRY;
+ }
+
+ previous_offset = off;
+ }
+
+ flb_log_event_decoder_destroy(&log_decoder);
+
+ return FLB_OK;
+}
+
+static void cb_udp_flush(struct flb_event_chunk *event_chunk,
+ struct flb_output_flush *out_flush,
+ struct flb_input_instance *i_ins,
+ void *out_context,
+ struct flb_config *config)
+{
+ int ret = FLB_ERROR;
+ struct flb_out_udp *ctx = out_context;
+
+ (void) i_ins;
+
+ if (ctx->ra_raw_message_key != NULL) {
+ ret = deliver_chunks_raw(ctx,
+ event_chunk->tag,
+ flb_sds_len(event_chunk->tag),
+ event_chunk->data,
+ event_chunk->size);
+ }
+ else if (ctx->out_format == FLB_PACK_JSON_FORMAT_NONE) {
+ ret = deliver_chunks_msgpack(ctx,
+ event_chunk->tag,
+ flb_sds_len(event_chunk->tag),
+ event_chunk->data,
+ event_chunk->size);
+ }
+ else {
+ ret = deliver_chunks_json(ctx,
+ event_chunk->tag,
+ flb_sds_len(event_chunk->tag),
+ event_chunk->data,
+ event_chunk->size);
+ }
+
+ return FLB_OUTPUT_RETURN(ret);
+}
+
+static int cb_udp_exit(void *data, struct flb_config *config)
+{
+ struct flb_out_udp *ctx = data;
+
+ flb_udp_conf_destroy(ctx);
+
+ return 0;
+}
+
+/* Configuration properties map */
+static struct flb_config_map config_map[] = {
+ {
+ FLB_CONFIG_MAP_STR, "format", "json_lines",
+ 0, FLB_FALSE, 0,
+ "Specify the payload format, supported formats: msgpack, json, "
+ "json_lines or json_stream."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "json_date_format", "double",
+ 0, FLB_FALSE, 0,
+ FBL_PACK_JSON_DATE_FORMAT_DESCRIPTION
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "json_date_key", "date",
+ 0, FLB_TRUE, offsetof(struct flb_out_udp, json_date_key),
+ "Specify the name of the date field in output."
+ },
+
+ {
+ FLB_CONFIG_MAP_STR, "raw_message_key", NULL,
+ 0, FLB_TRUE, offsetof(struct flb_out_udp, raw_message_key),
+ "use a raw message key for the message."
+ },
+
+ /* EOF */
+ {0}
+};
+
+/* Plugin reference */
+struct flb_output_plugin out_udp_plugin = {
+ .name = "udp",
+ .description = "UDP Output",
+ .cb_init = cb_udp_init,
+ .cb_flush = cb_udp_flush,
+ .cb_exit = cb_udp_exit,
+ .config_map = config_map,
+
+ .workers = 2,
+ .flags = FLB_OUTPUT_NET,
+};
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