Merging upstream version 1.44.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 193 insertions, 0 deletions

diff --git a/fluent-bit/plugins/in_syslog/syslog_conf.c b/fluent-bit/plugins/in_syslog/syslog_conf.c
new file mode 100644
index 000000000..4db3f1626
--- /dev/null
+++ b/fluent-bit/plugins/in_syslog/syslog_conf.c
@@ -0,0 +1,193 @@
+/* -*- 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_info.h>
+#include <fluent-bit/flb_config.h>
+#include <fluent-bit/flb_input.h>
+#include <fluent-bit/flb_input_plugin.h>
+#include <fluent-bit/flb_str.h>
+#include <fluent-bit/flb_log.h>
+#include <fluent-bit/flb_parser.h>
+#include <fluent-bit/flb_utils.h>
+
+#include "syslog.h"
+#include "syslog_server.h"
+#include "syslog_conf.h"
+
+struct flb_syslog *syslog_conf_create(struct flb_input_instance *ins,
+                                      struct flb_config *config)
+{
+    int ret;
+    char port[16];
+    struct flb_syslog *ctx;
+
+    ctx = flb_calloc(1, sizeof(struct flb_syslog));
+
+    if (ctx == NULL) {
+        flb_errno();
+
+        return NULL;
+    }
+
+    ctx->ins = ins;
+
+    ctx->log_encoder = flb_log_event_encoder_create(FLB_LOG_EVENT_FORMAT_DEFAULT);
+
+    if (ctx->log_encoder == NULL) {
+        flb_plg_error(ins, "could not initialize event encoder");
+        syslog_conf_destroy(ctx);
+
+        return NULL;
+    }
+
+    mk_list_init(&ctx->connections);
+
+    ret = flb_input_config_map_set(ins, (void *)ctx);
+    if (ret == -1) {
+        flb_log_event_encoder_destroy(ctx->log_encoder);
+
+        flb_plg_error(ins, "unable to load configuration");
+        flb_free(ctx);
+
+        return NULL;
+    }
+
+    /* Syslog mode: unix_udp, unix_tcp, tcp or udp */
+    if (ctx->mode_str) {
+#ifdef FLB_SYSTEM_WINDOWS
+        if (strcasestr(ctx->mode_str, "unix") != NULL) {
+            flb_log_event_encoder_destroy(ctx->log_encoder);
+
+            flb_plg_error(ins, "unix sockets are note available in windows");
+            flb_free(ctx);
+
+            return NULL;
+        }
+
+#undef FLB_SYSLOG_UNIX_UDP
+#define FLB_SYSLOG_UNIX_UDP FLB_SYSLOG_UDP
+#endif
+        if (strcasecmp(ctx->mode_str, "unix_tcp") == 0) {
+            ctx->mode = FLB_SYSLOG_UNIX_TCP;
+        }
+        else if (strcasecmp(ctx->mode_str, "unix_udp") == 0) {
+            ctx->mode = FLB_SYSLOG_UNIX_UDP;
+        }
+        else if (strcasecmp(ctx->mode_str, "tcp") == 0) {
+            ctx->mode = FLB_SYSLOG_TCP;
+        }
+        else if (strcasecmp(ctx->mode_str, "udp") == 0) {
+            ctx->mode = FLB_SYSLOG_UDP;
+        }
+        else {
+            flb_log_event_encoder_destroy(ctx->log_encoder);
+
+            flb_error("[in_syslog] Unknown syslog mode %s", ctx->mode_str);
+            flb_free(ctx);
+            return NULL;
+        }
+    }
+    else {
+        ctx->mode = FLB_SYSLOG_UNIX_UDP;
+    }
+
+    /* Check if TCP mode was requested */
+    if (ctx->mode == FLB_SYSLOG_TCP || ctx->mode == FLB_SYSLOG_UDP) {
+        /* Listen interface (if not set, defaults to 0.0.0.0:5140) */
+        flb_input_net_default_listener("0.0.0.0", 5140, ins);
+        ctx->listen = ins->host.listen;
+        snprintf(port, sizeof(port) - 1, "%d", ins->host.port);
+        ctx->port = flb_strdup(port);
+    }
+
+    /* Unix socket path and permission */
+    if (ctx->mode == FLB_SYSLOG_UNIX_UDP || ctx->mode == FLB_SYSLOG_UNIX_TCP) {
+        if (ctx->unix_perm_str) {
+            ctx->unix_perm = strtol(ctx->unix_perm_str, NULL, 8) & 07777;
+        } else {
+            ctx->unix_perm = 0644;
+        }
+    }
+
+    /* Buffer Chunk Size */
+    if (ctx->buffer_chunk_size == -1) {
+        flb_log_event_encoder_destroy(ctx->log_encoder);
+
+        flb_plg_error(ins, "invalid buffer_chunk_size");
+        flb_free(ctx);
+        return NULL; 
+    }
+
+    /* Buffer Max Size */
+    if (ctx->buffer_max_size == -1) {
+        flb_log_event_encoder_destroy(ctx->log_encoder);
+
+        flb_plg_error(ins, "invalid buffer_max_size");
+        flb_free(ctx);
+        return NULL;
+    }
+    else if (ctx->buffer_max_size == 0) {
+        ctx->buffer_max_size = ctx->buffer_chunk_size;
+    }
+
+    /* Socket rcv buffer size */
+    if (ctx->receive_buffer_size == -1 || ctx->receive_buffer_size>INT_MAX) {
+        flb_log_event_encoder_destroy(ctx->log_encoder);
+
+        flb_plg_error(ins, "invalid receive_buffer_size");
+        flb_free(ctx);
+        return NULL;
+    }
+
+    /* Parser */
+    if (ctx->parser_name) {
+        ctx->parser = flb_parser_get(ctx->parser_name, config);
+    }
+    else {
+        if (ctx->mode == FLB_SYSLOG_TCP || ctx->mode == FLB_SYSLOG_UDP) {
+            ctx->parser = flb_parser_get("syslog-rfc5424", config);
+        }
+        else {
+            ctx->parser = flb_parser_get("syslog-rfc3164-local", config);
+        }
+    }
+
+    if (!ctx->parser) {
+        flb_log_event_encoder_destroy(ctx->log_encoder);
+
+        flb_error("[in_syslog] parser not set");
+        syslog_conf_destroy(ctx);
+        return NULL;
+    }
+
+    return ctx;
+}
+
+int syslog_conf_destroy(struct flb_syslog *ctx)
+{
+    if (ctx->log_encoder != NULL) {
+        flb_log_event_encoder_destroy(ctx->log_encoder);
+    }
+
+    syslog_server_destroy(ctx);
+
+    flb_free(ctx);
+
+    return 0;
+}