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/* -*- 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_base64.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/flb_record_accessor.h>
#include <fluent-bit/flb_pack.h>
#include "azure.h"
#include "azure_conf.h"
struct flb_azure *flb_azure_conf_create(struct flb_output_instance *ins,
struct flb_config *config)
{
int ret;
size_t size;
size_t olen;
const char *tmp;
struct flb_upstream *upstream;
struct flb_azure *ctx;
struct flb_record_accessor *ra_prefix_key = NULL;
/* Allocate config context */
ctx = flb_calloc(1, sizeof(struct flb_azure));
if (!ctx) {
flb_errno();
return NULL;
}
ctx->ins = ins;
/* Set context */
flb_output_set_context(ins, ctx);
/* Load config map */
ret = flb_output_config_map_set(ins, (void *) ctx);
if (ret == -1) {
return NULL;
}
if (!ctx->customer_id) {
flb_plg_error(ctx->ins, "property 'customer_id' is not defined");
flb_azure_conf_destroy(ctx);
return NULL;
}
/* config: 'shared_key' */
if (!ctx->shared_key) {
flb_plg_error(ctx->ins, "property 'shared_key' is not defined");
flb_azure_conf_destroy(ctx);
return NULL;
}
/* decode shared key */
size = flb_sds_len(ctx->shared_key) * 1.2;
ctx->dec_shared_key = flb_sds_create_size(size);
if (!ctx->dec_shared_key) {
flb_errno();
flb_azure_conf_destroy(ctx);
return NULL;
}
ret = flb_base64_decode((unsigned char *) ctx->dec_shared_key, size,
&olen,
(unsigned char *) ctx->shared_key,
flb_sds_len(ctx->shared_key));
if (ret != 0) {
flb_plg_error(ctx->ins, "error decoding shared_key");
flb_azure_conf_destroy(ctx);
return NULL;
}
flb_sds_len_set(ctx->dec_shared_key, olen);
/* config: 'log_type_key' */
if (ctx->log_type_key) {
ra_prefix_key = flb_ra_create(ctx->log_type_key, FLB_TRUE);
if (!ra_prefix_key) {
flb_plg_error(ctx->ins, "invalid log_type_key pattern '%s'", ctx->log_type_key);
flb_azure_conf_destroy(ctx);
return NULL;
}
else {
ctx->ra_prefix_key = ra_prefix_key;
}
}
/* Validate hostname given by command line or 'Host' property */
if (!ins->host.name && !ctx->customer_id) {
flb_plg_error(ctx->ins, "property 'customer_id' is not defined");
flb_free(ctx);
return NULL;
}
/* Lookup customer id from given host name */
if (!ctx->customer_id) {
tmp = strchr(ins->host.name, '.');
if (!tmp) {
flb_plg_error(ctx->ins, "invalid hostname");
flb_free(ctx);
return NULL;
}
else {
ctx->customer_id = flb_sds_create_len(ins->host.name,
tmp - ins->host.name);
if (!ctx->customer_id) {
flb_errno();
flb_free(ctx);
return NULL;
}
}
}
/* Compose real host */
ctx->host = flb_sds_create_size(256);
if (!ctx->host) {
flb_errno();
flb_free(ctx);
return NULL;
}
if (!ins->host.name) {
flb_sds_cat(ctx->host, ctx->customer_id,
flb_sds_len(ctx->customer_id));
flb_sds_cat(ctx->host, FLB_AZURE_HOST, sizeof(FLB_AZURE_HOST) - 1);
}
else {
if (!strstr(ins->host.name, ctx->customer_id)) {
flb_sds_cat(ctx->host, ctx->customer_id,
flb_sds_len(ctx->customer_id));
if (ins->host.name[0] != '.') {
flb_sds_cat(ctx->host, ".", 1);
}
}
flb_sds_cat(ctx->host, ins->host.name, strlen(ins->host.name));
}
/* TCP Port */
if (ins->host.port == 0) {
ctx->port = FLB_AZURE_PORT;
}
else {
ctx->port = ins->host.port;
}
/* Prepare an upstream handler */
upstream = flb_upstream_create(config,
ctx->host,
ctx->port,
FLB_IO_TLS,
ins->tls);
if (!upstream) {
flb_plg_error(ctx->ins, "cannot create Upstream context");
flb_azure_conf_destroy(ctx);
return NULL;
}
ctx->u = upstream;
flb_output_upstream_set(ctx->u, ins);
/* Compose uri */
ctx->uri = flb_sds_create_size(1024);
if (!ctx->uri) {
flb_errno();
flb_azure_conf_destroy(ctx);
return NULL;
}
flb_sds_cat(ctx->uri, FLB_AZURE_RESOURCE, sizeof(FLB_AZURE_RESOURCE) - 1);
flb_sds_cat(ctx->uri, FLB_AZURE_API_VERSION,
sizeof(FLB_AZURE_API_VERSION) - 1);
flb_plg_info(ctx->ins, "customer_id='%s' host='%s:%i'",
ctx->customer_id, ctx->host, ctx->port);
return ctx;
}
int flb_azure_conf_destroy(struct flb_azure *ctx)
{
if (!ctx) {
return -1;
}
if (ctx->dec_shared_key) {
flb_sds_destroy(ctx->dec_shared_key);
}
if (ctx->host) {
flb_sds_destroy(ctx->host);
}
if (ctx->uri) {
flb_sds_destroy(ctx->uri);
}
if (ctx->ra_prefix_key) {
flb_ra_destroy(ctx->ra_prefix_key);
}
if (ctx->u) {
flb_upstream_destroy(ctx->u);
}
flb_free(ctx);
return 0;
}
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