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-rw-r--r--src/fluent-bit/plugins/in_winlog/in_winlog.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/in_winlog/in_winlog.c b/src/fluent-bit/plugins/in_winlog/in_winlog.c
new file mode 100644
index 000000000..1d5398635
--- /dev/null
+++ b/src/fluent-bit/plugins/in_winlog/in_winlog.c
@@ -0,0 +1,267 @@
+/* -*- 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_compat.h>
+#include <fluent-bit/flb_input_plugin.h>
+#include <fluent-bit/flb_kernel.h>
+#include <fluent-bit/flb_pack.h>
+#include <fluent-bit/flb_utils.h>
+#include <fluent-bit/flb_sqldb.h>
+#include "winlog.h"
+
+#define DEFAULT_INTERVAL_SEC 1
+#define DEFAULT_INTERVAL_NSEC 0
+#define DEFAULT_BUFFER_SIZE 0x7ffff /* Max size allowed by Win32 (512kb) */
+
+static int in_winlog_collect(struct flb_input_instance *ins,
+ struct flb_config *config, void *in_context);
+
+static int in_winlog_init(struct flb_input_instance *in,
+ struct flb_config *config, void *data)
+{
+ int ret;
+ const char *tmp;
+ struct mk_list *head;
+ struct winlog_channel *ch;
+ struct winlog_config *ctx;
+
+ /* Initialize context */
+ ctx = flb_calloc(1, sizeof(struct winlog_config));
+ if (!ctx) {
+ flb_errno();
+ return -1;
+ }
+ ctx->ins = in;
+
+ /* Load the config map */
+ ret = flb_input_config_map_set(in, (void *) ctx);
+ if (ret == -1) {
+ flb_free(ctx);
+ return -1;
+ }
+
+ /* Read Buffer */
+ ctx->bufsize = DEFAULT_BUFFER_SIZE;
+ ctx->buf = flb_malloc(ctx->bufsize);
+ if (!ctx->buf) {
+ flb_errno();
+ flb_free(ctx);
+ }
+
+ /* Open channels */
+ tmp = flb_input_get_property("channels", in);
+ if (!tmp) {
+ flb_plg_debug(ctx->ins, "no channel provided. listening to 'Application'");
+ tmp = "Application";
+ }
+
+ ctx->active_channel = winlog_open_all(tmp);
+ if (!ctx->active_channel) {
+ flb_plg_error(ctx->ins, "failed to open channels");
+ flb_free(ctx->buf);
+ flb_free(ctx);
+ return -1;
+ }
+
+ /* Initialize SQLite DB (optional) */
+ tmp = flb_input_get_property("db", in);
+ if (tmp) {
+ ctx->db = flb_sqldb_open(tmp, in->name, config);
+ if (!ctx->db) {
+ flb_plg_error(ctx->ins, "could not open/create database");
+ winlog_close_all(ctx->active_channel);
+ flb_free(ctx->buf);
+ flb_free(ctx);
+ return -1;
+ }
+
+ ret = flb_sqldb_query(ctx->db, SQL_CREATE_CHANNELS, NULL, NULL);
+ if (ret != FLB_OK) {
+ flb_plg_error(ctx->ins, "could not create 'channels' table");
+ flb_sqldb_close(ctx->db);
+ winlog_close_all(ctx->active_channel);
+ flb_free(ctx->buf);
+ flb_free(ctx);
+ return -1;
+ }
+
+ mk_list_foreach(head, ctx->active_channel) {
+ ch = mk_list_entry(head, struct winlog_channel, _head);
+ winlog_sqlite_load(ch, ctx->db);
+ flb_plg_debug(ctx->ins, "load channel<%s record=%u time=%u>",
+ ch->name, ch->record_number, ch->time_written);
+ }
+ }
+
+ /* Set the context */
+ flb_input_set_context(in, ctx);
+
+ /* Set the collector */
+ ret = flb_input_set_collector_time(in,
+ in_winlog_collect,
+ ctx->interval_sec,
+ ctx->interval_nsec,
+ config);
+ if (ret == -1) {
+ flb_plg_error(ctx->ins, "could not set up a collector");
+ }
+ ctx->coll_fd = ret;
+
+ return 0;
+}
+
+static int in_winlog_read_channel(struct flb_input_instance *ins,
+ struct winlog_config *ctx,
+ struct winlog_channel *ch)
+{
+ unsigned int read;
+ char *ptr;
+ PEVENTLOGRECORD evt;
+ msgpack_packer mp_pck;
+ msgpack_sbuffer mp_sbuf;
+
+ if (winlog_read(ch, ctx->buf, ctx->bufsize, &read)) {
+ flb_plg_error(ctx->ins, "failed to read '%s'", ch->name);
+ return -1;
+ }
+ if (read == 0) {
+ return 0;
+ }
+ flb_plg_debug(ctx->ins, "read %u bytes from '%s'", read, ch->name);
+
+ msgpack_sbuffer_init(&mp_sbuf);
+ msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write);
+
+ ptr = ctx->buf;
+ while (ptr < ctx->buf + read) {
+ evt = (PEVENTLOGRECORD) ptr;
+
+ winlog_pack_event(&mp_pck, evt, ch, ctx);
+
+ ch->record_number = evt->RecordNumber;
+ ch->time_written = evt->TimeWritten;
+
+ ptr += evt->Length;
+ }
+
+ if (ctx->db) {
+ flb_plg_debug(ctx->ins, "save channel<%s record=%u time=%u>",
+ ch->name, ch->record_number, ch->time_written);
+ winlog_sqlite_save(ch, ctx->db);
+ }
+
+ flb_input_log_append(ins, NULL, 0, mp_sbuf.data, mp_sbuf.size);
+
+ msgpack_sbuffer_destroy(&mp_sbuf);
+ return 0;
+}
+
+static int in_winlog_collect(struct flb_input_instance *ins,
+ struct flb_config *config, void *in_context)
+{
+ struct winlog_config *ctx = in_context;
+ struct mk_list *head;
+ struct winlog_channel *ch;
+
+ mk_list_foreach(head, ctx->active_channel) {
+ ch = mk_list_entry(head, struct winlog_channel, _head);
+ in_winlog_read_channel(ins, ctx, ch);
+ }
+ return 0;
+}
+
+static void in_winlog_pause(void *data, struct flb_config *config)
+{
+ struct winlog_config *ctx = data;
+ flb_input_collector_pause(ctx->coll_fd, ctx->ins);
+}
+
+static void in_winlog_resume(void *data, struct flb_config *config)
+{
+ struct winlog_config *ctx = data;
+ flb_input_collector_resume(ctx->coll_fd, ctx->ins);
+}
+
+static int in_winlog_exit(void *data, struct flb_config *config)
+{
+ struct winlog_config *ctx = data;
+
+ if (!ctx) {
+ return 0;
+ }
+
+ winlog_close_all(ctx->active_channel);
+
+ if (ctx->db) {
+ flb_sqldb_close(ctx->db);
+ }
+ flb_free(ctx->buf);
+ flb_free(ctx);
+
+ return 0;
+}
+
+static struct flb_config_map config_map[] = {
+ {
+ FLB_CONFIG_MAP_STR, "channels", NULL,
+ 0, FLB_FALSE, 0,
+ "Specify a comma-separated list of channels to read from"
+ },
+ {
+ FLB_CONFIG_MAP_STR, "db", NULL,
+ 0, FLB_FALSE, 0,
+ "Specify DB file to save read offsets"
+ },
+ {
+ FLB_CONFIG_MAP_TIME, "interval_sec", "1s",
+ 0, FLB_TRUE, offsetof(struct winlog_config, interval_sec),
+ "Set the polling interval for each channel"
+ },
+ {
+ FLB_CONFIG_MAP_INT, "interval_nsec", "0",
+ 0, FLB_TRUE, offsetof(struct winlog_config, interval_nsec),
+ "Set the polling interval for each channel (sub seconds)"
+ },
+ {
+ FLB_CONFIG_MAP_BOOL, "string_inserts", "true",
+ 0, FLB_TRUE, offsetof(struct winlog_config, string_inserts),
+ "Whether to include StringInserts in output records"
+ },
+ {
+ FLB_CONFIG_MAP_BOOL, "use_ansi", "false",
+ 0, FLB_TRUE, offsetof(struct winlog_config, use_ansi),
+ "Use ANSI encoding on eventlog messages"
+ },
+
+ /* EOF */
+ {0}
+};
+
+struct flb_input_plugin in_winlog_plugin = {
+ .name = "winlog",
+ .description = "Windows Event Log",
+ .cb_init = in_winlog_init,
+ .cb_pre_run = NULL,
+ .cb_collect = in_winlog_collect,
+ .cb_flush_buf = NULL,
+ .cb_pause = in_winlog_pause,
+ .cb_resume = in_winlog_resume,
+ .cb_exit = in_winlog_exit,
+ .config_map = config_map
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-08 21:39:02 +0000