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splunk_prot.c
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2024 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_input_plugin.h>
#include <fluent-bit/flb_version.h>
#include <fluent-bit/flb_error.h>
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_gzip.h>
#include <monkey/monkey.h>
#include <monkey/mk_core.h>
#include "splunk.h"
#include "splunk_conn.h"
#include "splunk_prot.h"
#define HTTP_CONTENT_JSON 0
#define HTTP_CONTENT_TEXT 1
#define HTTP_CONTENT_UNKNOWN 2
static int send_response(struct splunk_conn *conn, int http_status, char *message)
{
struct flb_splunk *context;
size_t sent;
int len;
flb_sds_t out;
context = (struct flb_splunk *) conn->ctx;
out = flb_sds_create_size(256);
if (!out) {
return -1;
}
if (message) {
len = strlen(message);
}
else {
len = 0;
}
if (http_status == 201) {
flb_sds_printf(&out,
"HTTP/1.1 201 Created \r\n"
"Server: Fluent Bit v%s\r\n"
"%s"
"Content-Length: 0\r\n\r\n",
FLB_VERSION_STR,
context->success_headers_str);
}
else if (http_status == 200) {
flb_sds_printf(&out,
"HTTP/1.1 200 OK\r\n"
"Server: Fluent Bit v%s\r\n"
"%s"
"Content-Length: 0\r\n\r\n",
FLB_VERSION_STR,
context->success_headers_str);
}
else if (http_status == 204) {
flb_sds_printf(&out,
"HTTP/1.1 204 No Content\r\n"
"Server: Fluent Bit v%s\r\n"
"%s"
"\r\n\r\n",
FLB_VERSION_STR,
context->success_headers_str);
}
else if (http_status == 400) {
flb_sds_printf(&out,
"HTTP/1.1 400 Bad Request\r\n"
"Server: Fluent Bit v%s\r\n"
"Content-Length: %i\r\n\r\n%s",
FLB_VERSION_STR,
len, message);
}
else if (http_status == 401) {
flb_sds_printf(&out,
"HTTP/1.1 401 Unauthorized\r\n"
"Server: Fluent Bit v%s\r\n"
"Content-Length: %i\r\n\r\n%s",
FLB_VERSION_STR,
len, message);
}
/* We should check this operations result */
flb_io_net_write(conn->connection,
(void *) out,
flb_sds_len(out),
&sent);
flb_sds_destroy(out);
return 0;
}
static int send_json_message_response(struct splunk_conn *conn, int http_status, char *message)
{
size_t sent;
int len;
flb_sds_t out;
out = flb_sds_create_size(256);
if (!out) {
return -1;
}
if (message) {
len = strlen(message);
}
else {
len = 0;
}
if (http_status == 200) {
flb_sds_printf(&out,
"HTTP/1.1 200 OK\r\n"
"Content-Type: application/json\r\n"
"Content-Length: %i\r\n\r\n%s",
len, message);
}
/* We should check this operations result */
flb_io_net_write(conn->connection,
(void *) out,
flb_sds_len(out),
&sent);
flb_sds_destroy(out);
return 0;
}
/* implements functionality to get tag from key in record */
static flb_sds_t tag_key(struct flb_splunk *ctx, msgpack_object *map)
{
size_t map_size = map->via.map.size;
msgpack_object_kv *kv;
msgpack_object key;
msgpack_object val;
char *key_str = NULL;
char *val_str = NULL;
size_t key_str_size = 0;
size_t val_str_size = 0;
int j;
int check = FLB_FALSE;
int found = FLB_FALSE;
flb_sds_t tag;
kv = map->via.map.ptr;
for(j=0; j < map_size; j++) {
check = FLB_FALSE;
found = FLB_FALSE;
key = (kv+j)->key;
if (key.type == MSGPACK_OBJECT_BIN) {
key_str = (char *) key.via.bin.ptr;
key_str_size = key.via.bin.size;
check = FLB_TRUE;
}
if (key.type == MSGPACK_OBJECT_STR) {
key_str = (char *) key.via.str.ptr;
key_str_size = key.via.str.size;
check = FLB_TRUE;
}
if (check == FLB_TRUE) {
if (strncmp(ctx->tag_key, key_str, key_str_size) == 0) {
val = (kv+j)->val;
if (val.type == MSGPACK_OBJECT_BIN) {
val_str = (char *) val.via.bin.ptr;
val_str_size = val.via.str.size;
found = FLB_TRUE;
break;
}
if (val.type == MSGPACK_OBJECT_STR) {
val_str = (char *) val.via.str.ptr;
val_str_size = val.via.str.size;
found = FLB_TRUE;
break;
}
}
}
}
if (found == FLB_TRUE) {
tag = flb_sds_create_len(val_str, val_str_size);
if (!tag) {
flb_errno();
return NULL;
}
return tag;
}
flb_plg_error(ctx->ins, "Could not find tag_key %s in record", ctx->tag_key);
return NULL;
}
/*
* Process a raw text payload for Splunk HEC requests, uses the delimited character to split records,
* return the number of processed bytes
*/
static int process_raw_payload_pack(struct flb_splunk *ctx, flb_sds_t tag, char *buf, size_t size)
{
int ret = FLB_EVENT_ENCODER_SUCCESS;
ret = flb_log_event_encoder_begin_record(&ctx->log_encoder);
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_set_current_timestamp(&ctx->log_encoder);
}
if (ctx->store_token_in_metadata == FLB_TRUE) {
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_append_body_values(
&ctx->log_encoder,
FLB_LOG_EVENT_CSTRING_VALUE("log"),
FLB_LOG_EVENT_STRING_VALUE(buf, size));
}
}
if (ctx->store_token_in_metadata == FLB_TRUE) {
if (ctx->ingested_auth_header != NULL) {
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_append_metadata_values(
&ctx->log_encoder,
FLB_LOG_EVENT_CSTRING_VALUE("hec_token"),
FLB_LOG_EVENT_CSTRING_VALUE(ctx->ingested_auth_header));
}
}
}
else {
if (ctx->ingested_auth_header != NULL) {
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_append_body_values(
&ctx->log_encoder,
FLB_LOG_EVENT_CSTRING_VALUE(ctx->store_token_key),
FLB_LOG_EVENT_CSTRING_VALUE(ctx->ingested_auth_header),
FLB_LOG_EVENT_CSTRING_VALUE("log"),
FLB_LOG_EVENT_STRING_VALUE(buf, size));
}
}
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_commit_record(&ctx->log_encoder);
}
if (ret != FLB_EVENT_ENCODER_SUCCESS) {
flb_log_event_encoder_rollback_record(&ctx->log_encoder);
return -1;
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
if (tag) {
flb_input_log_append(ctx->ins, tag, flb_sds_len(tag),
ctx->log_encoder.output_buffer,
ctx->log_encoder.output_length);
}
else {
/* use default plugin Tag (it internal name, e.g: http.0 */
flb_input_log_append(ctx->ins, NULL, 0,
ctx->log_encoder.output_buffer,
ctx->log_encoder.output_length);
}
}
else {
flb_plg_error(ctx->ins, "log event encoding error : %d", ret);
}
return 0;
}
static void process_flb_log_append(struct flb_splunk *ctx, msgpack_object *record,
flb_sds_t tag, flb_sds_t tag_from_record,
struct flb_time tm) {
int ret;
int i;
msgpack_object_kv *kv;
ret = flb_log_event_encoder_begin_record(&ctx->log_encoder);
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_set_timestamp(
&ctx->log_encoder,
&tm);
}
if (ctx->store_token_in_metadata == FLB_TRUE) {
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_set_body_from_msgpack_object(
&ctx->log_encoder,
record);
}
if (ctx->ingested_auth_header != NULL) {
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_append_metadata_values(
&ctx->log_encoder,
FLB_LOG_EVENT_CSTRING_VALUE("hec_token"),
FLB_LOG_EVENT_CSTRING_VALUE(ctx->ingested_auth_header));
}
}
}
else {
if (ctx->ingested_auth_header != NULL) {
/* iterate through the old record map to create the appendable new buffer */
kv = record->via.map.ptr;
for(i = 0; i < record->via.map.size && ret == FLB_EVENT_ENCODER_SUCCESS; i++) {
ret = flb_log_event_encoder_append_body_values(
&ctx->log_encoder,
FLB_LOG_EVENT_MSGPACK_OBJECT_VALUE(&kv[i].key),
FLB_LOG_EVENT_MSGPACK_OBJECT_VALUE(&kv[i].val));
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_append_body_values(
&ctx->log_encoder,
FLB_LOG_EVENT_CSTRING_VALUE(ctx->store_token_key),
FLB_LOG_EVENT_CSTRING_VALUE(ctx->ingested_auth_header));
}
}
else {
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_set_body_from_msgpack_object(
&ctx->log_encoder,
record);
}
}
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
ret = flb_log_event_encoder_commit_record(&ctx->log_encoder);
}
if (ret == FLB_EVENT_ENCODER_SUCCESS) {
if (tag_from_record) {
flb_input_log_append(ctx->ins,
tag_from_record,
flb_sds_len(tag_from_record),
ctx->log_encoder.output_buffer,
ctx->log_encoder.output_length);
}
else if (tag) {
flb_input_log_append(ctx->ins, tag, flb_sds_len(tag),
ctx->log_encoder.output_buffer,
ctx->log_encoder.output_length);
}
else {
/* use default plugin Tag (it internal name, e.g: http.0 */
flb_input_log_append(ctx->ins, NULL, 0,
ctx->log_encoder.output_buffer,
ctx->log_encoder.output_length);
}
}
else {
flb_plg_error(ctx->ins, "Error encoding record : %d", ret);
}
if (tag_from_record) {
flb_sds_destroy(tag_from_record);
}
}
static int process_json_payload_pack(struct flb_splunk *ctx, flb_sds_t tag, char *buf, size_t size)
{
size_t off = 0;
msgpack_unpacked result;
struct flb_time tm;
int i = 0;
msgpack_object *obj;
msgpack_object record;
flb_sds_t tag_from_record = NULL;
flb_time_get(&tm);
msgpack_unpacked_init(&result);
while (msgpack_unpack_next(&result, buf, size, &off) == MSGPACK_UNPACK_SUCCESS) {
if (result.data.type == MSGPACK_OBJECT_MAP) {
tag_from_record = NULL;
if (ctx->tag_key) {
tag_from_record = tag_key(ctx, &result.data);
}
process_flb_log_append(ctx, &result.data, tag, tag_from_record, tm);
flb_log_event_encoder_reset(&ctx->log_encoder);
}
else if (result.data.type == MSGPACK_OBJECT_ARRAY) {
obj = &result.data;
for (i = 0; i < obj->via.array.size; i++)
{
record = obj->via.array.ptr[i];
tag_from_record = NULL;
if (ctx->tag_key) {
tag_from_record = tag_key(ctx, &record);
}
process_flb_log_append(ctx, &record, tag, tag_from_record, tm);
/* TODO : Optimize this
*
* This is wasteful, considering that we are emitting a series
* of records we should start and commit each one and then
* emit them all at once after the loop.
*/
flb_log_event_encoder_reset(&ctx->log_encoder);
}
break;
}
else {
flb_plg_error(ctx->ins, "skip record from invalid type: %i",
result.data.type);
msgpack_unpacked_destroy(&result);
return -1;
}
}
msgpack_unpacked_destroy(&result);
return 0;
}
static ssize_t parse_hec_payload_json(struct flb_splunk *ctx, flb_sds_t tag,
char *payload, size_t size)
{
int ret;
int out_size;
char *pack;
struct flb_pack_state pack_state;
/* Initialize packer */
flb_pack_state_init(&pack_state);
/* Pack JSON as msgpack */
ret = flb_pack_json_state(payload, size,
&pack, &out_size, &pack_state);
flb_pack_state_reset(&pack_state);
/* Handle exceptions */
if (ret == FLB_ERR_JSON_PART) {
flb_plg_warn(ctx->ins, "JSON data is incomplete, skipping");
return -1;
}
else if (ret == FLB_ERR_JSON_INVAL) {
flb_plg_warn(ctx->ins, "invalid JSON message, skipping");
return -1;
}
else if (ret == -1) {
return -1;
}
/* Process the packaged JSON and return the last byte used */
process_json_payload_pack(ctx, tag, pack, out_size);
flb_free(pack);
return 0;
}
static int validate_auth_header(struct flb_splunk *ctx, struct mk_http_request *request)
{
struct mk_list *head;
struct mk_http_header *auth_header = NULL;
struct flb_splunk_tokens *splunk_token;
if (mk_list_size(&ctx->auth_tokens) == 0) {
return SPLUNK_AUTH_UNAUTH;
}
auth_header = mk_http_header_get(MK_HEADER_AUTHORIZATION, request, NULL, 0);
if (auth_header == NULL) {
return SPLUNK_AUTH_MISSING_CRED;
}
if (auth_header != NULL && auth_header->val.len > 0) {
mk_list_foreach(head, &ctx->auth_tokens) {
splunk_token = mk_list_entry(head, struct flb_splunk_tokens, _head);
if (strncmp(splunk_token->header,
auth_header->val.data,
strlen(splunk_token->header)) == 0) {
return SPLUNK_AUTH_SUCCESS;
}
}
return SPLUNK_AUTH_UNAUTHORIZED;
}
else {
return SPLUNK_AUTH_MISSING_CRED;
}
return SPLUNK_AUTH_SUCCESS;
}
static int handle_hec_payload(struct flb_splunk *ctx, int content_type,
flb_sds_t tag, char *buf, size_t size)
{
int ret = -1;
if (content_type == HTTP_CONTENT_JSON) {
ret = parse_hec_payload_json(ctx, tag, buf, size);
}
else if (content_type == HTTP_CONTENT_TEXT) {
ret = process_raw_payload_pack(ctx, tag, buf, size);
}
else if (content_type == HTTP_CONTENT_UNKNOWN) {
if (buf[0] == '{') {
ret = parse_hec_payload_json(ctx, tag, buf, size);
}
else {
ret = process_raw_payload_pack(ctx, tag, buf, size);
}
}
return ret;
}
static int process_hec_payload(struct flb_splunk *ctx, struct splunk_conn *conn,
flb_sds_t tag,
struct mk_http_session *session,
struct mk_http_request *request)
{
int i = 0;
int ret = 0;
int type = -1;
struct mk_http_header *header;
struct mk_http_header *header_auth;
int extra_size = -1;
struct mk_http_header *headers_extra;
int gzip_compressed = FLB_FALSE;
void *gz_data = NULL;
size_t gz_size = -1;
header = &session->parser.headers[MK_HEADER_CONTENT_TYPE];
if (header->key.data == NULL) {
send_response(conn, 400, "error: header 'Content-Type' is not set\n");
return -1;
}
if (header->val.len == 16 &&
strncasecmp(header->val.data, "application/json", 16) == 0) {
type = HTTP_CONTENT_JSON;
}
else if (header->val.len == 10 &&
strncasecmp(header->val.data, "text/plain", 10) == 0) {
type = HTTP_CONTENT_TEXT;
}
else {
/* Not necessary to specify content-type for Splunk HEC. */
flb_plg_debug(ctx->ins, "Mark as unknown type for ingested payloads");
type = HTTP_CONTENT_UNKNOWN;
}
if (request->data.len <= 0) {
send_response(conn, 400, "error: no payload found\n");
return -1;
}
header_auth = &session->parser.headers[MK_HEADER_AUTHORIZATION];
if (header_auth->key.data != NULL) {
if (strncasecmp(header_auth->val.data, "Splunk ", 7) == 0) {
ctx->ingested_auth_header = header_auth->val.data;
}
}
extra_size = session->parser.headers_extra_count;
if (extra_size > 0) {
for (i = 0; i < extra_size; i++) {
headers_extra = &session->parser.headers_extra[i];
if (headers_extra->key.len == 16 &&
strncasecmp(headers_extra->key.data, "Content-Encoding", 16) == 0) {
if (headers_extra->val.len == 4 &&
strncasecmp(headers_extra->val.data, "gzip", 4) == 0) {
flb_plg_debug(ctx->ins, "body is gzipped");
gzip_compressed = FLB_TRUE;
}
}
}
}
if (gzip_compressed == FLB_TRUE) {
ret = flb_gzip_uncompress((void *) request->data.data, request->data.len,
&gz_data, &gz_size);
if (ret == -1) {
flb_plg_error(ctx->ins, "gzip uncompress is failed");
return -1;
}
ret = handle_hec_payload(ctx, type, tag, gz_data, gz_size);
flb_free(gz_data);
}
else {
ret = handle_hec_payload(ctx, type, tag, request->data.data, request->data.len);
}
return 0;
}
static int process_hec_raw_payload(struct flb_splunk *ctx, struct splunk_conn *conn,
flb_sds_t tag,
struct mk_http_session *session,
struct mk_http_request *request)
{
int ret = -1;
struct mk_http_header *header;
struct mk_http_header *header_auth;
header = &session->parser.headers[MK_HEADER_CONTENT_TYPE];
if (header->key.data == NULL) {
send_response(conn, 400, "error: header 'Content-Type' is not set\n");
return -1;
}
else if (header->val.len != 10 ||
strncasecmp(header->val.data, "text/plain", 10) != 0) {
/* Not necessary to specify content-type for Splunk HEC. */
flb_plg_debug(ctx->ins, "Mark as unknown type for ingested payloads");
}
if (request->data.len <= 0) {
send_response(conn, 400, "error: no payload found\n");
return -1;
}
header_auth = &session->parser.headers[MK_HEADER_AUTHORIZATION];
if (header_auth->key.data != NULL) {
if (strncasecmp(header_auth->val.data, "Splunk ", 7) == 0) {
ctx->ingested_auth_header = header_auth->val.data;
}
}
/* Always handle as raw type of payloads here */
ret = process_raw_payload_pack(ctx, tag, request->data.data, request->data.len);
return ret;
}
static inline int mk_http_point_header(mk_ptr_t *h,
struct mk_http_parser *parser, int key)
{
struct mk_http_header *header;
header = &parser->headers[key];
if (header->type == key) {
h->data = header->val.data;
h->len = header->val.len;
return 0;
}
else {
h->data = NULL;
h->len = -1;
}
return -1;
}
/*
* Handle an incoming request. It perform extra checks over the request, if
* everything is OK, it enqueue the incoming payload.
*/
int splunk_prot_handle(struct flb_splunk *ctx, struct splunk_conn *conn,
struct mk_http_session *session,
struct mk_http_request *request)
{
int i;
int ret;
int len;
char *uri;
char *qs;
off_t diff;
flb_sds_t tag;
struct mk_http_header *header;
if (request->uri.data[0] != '/') {
send_response(conn, 400, "error: invalid request\n");
return -1;
}
/* Decode URI */
uri = mk_utils_url_decode(request->uri);
if (!uri) {
uri = mk_mem_alloc_z(request->uri.len + 1);
if (!uri) {
return -1;
}
memcpy(uri, request->uri.data, request->uri.len);
uri[request->uri.len] = '\0';
}
/* Try to match a query string so we can remove it */
qs = strchr(uri, '?');
if (qs) {
/* remove the query string part */
diff = qs - uri;
uri[diff] = '\0';
}
/* Refer the tag at first*/
if (ctx->ins->tag && !ctx->ins->tag_default) {
tag = flb_sds_create(ctx->ins->tag);
if (tag == NULL) {
return -1;
}
}
else {
/* Compose the query string using the URI */
len = strlen(uri);
if (len == 1) {
tag = NULL; /* use default tag */
}
else {
/* New tag skipping the URI '/' */
tag = flb_sds_create_len(&uri[1], len - 1);
if (!tag) {
mk_mem_free(uri);
return -1;
}
/* Sanitize, only allow alphanum chars */
for (i = 0; i < flb_sds_len(tag); i++) {
if (!isalnum(tag[i]) && tag[i] != '_' && tag[i] != '.') {
tag[i] = '_';
}
}
}
}
/* Check if we have a Host header: Hostname ; port */
mk_http_point_header(&request->host, &session->parser, MK_HEADER_HOST);
/* Header: Connection */
mk_http_point_header(&request->connection, &session->parser,
MK_HEADER_CONNECTION);
/* HTTP/1.1 needs Host header */
if (request->host.data == NULL && request->protocol == MK_HTTP_PROTOCOL_11) {
flb_sds_destroy(tag);
mk_mem_free(uri);
return -1;
}
/* Should we close the session after this request ? */
mk_http_keepalive_check(session, request, ctx->server);
/* Content Length */
header = &session->parser.headers[MK_HEADER_CONTENT_LENGTH];
if (header->type == MK_HEADER_CONTENT_LENGTH) {
request->_content_length.data = header->val.data;
request->_content_length.len = header->val.len;
}
else {
request->_content_length.data = NULL;
}
if (request->method == MK_METHOD_GET) {
/* Handle health monitoring of splunk hec endpoint for load balancers */
if (strcasecmp(uri, "/services/collector/health") == 0) {
send_json_message_response(conn, 200, "{\"text\":\"Success\",\"code\":200}");
}
else {
send_response(conn, 400, "error: invalid HTTP endpoint\n");
}
flb_sds_destroy(tag);
mk_mem_free(uri);
return 0;
}
/* Under services/collector endpoints are required for
* authentication if provided splunk_token */
ret = validate_auth_header(ctx, request);
if (ret < 0){
send_response(conn, 401, "error: unauthorized\n");
if (ret == SPLUNK_AUTH_MISSING_CRED) {
flb_plg_warn(ctx->ins, "missing credentials in request headers");
}
else if (ret == SPLUNK_AUTH_UNAUTHORIZED) {
flb_plg_warn(ctx->ins, "wrong credentials in request headers");
}
flb_sds_destroy(tag);
mk_mem_free(uri);
return -1;
}
/* Handle every ingested payload cleanly */
flb_log_event_encoder_reset(&ctx->log_encoder);
if (request->method == MK_METHOD_POST) {
if (strcasecmp(uri, "/services/collector/raw") == 0) {
ret = process_hec_raw_payload(ctx, conn, tag, session, request);
if (!ret) {
send_json_message_response(conn, 400, "{\"text\":\"Invalid data format\",\"code\":6}");
}
send_json_message_response(conn, 200, "{\"text\":\"Success\",\"code\":0}");
}
else if (strcasecmp(uri, "/services/collector/event") == 0 ||
strcasecmp(uri, "/services/collector") == 0) {
ret = process_hec_payload(ctx, conn, tag, session, request);
if (!ret) {
send_json_message_response(conn, 400, "{\"text\":\"Invalid data format\",\"code\":6}");
}
send_json_message_response(conn, 200, "{\"text\":\"Success\",\"code\":0}");
}
else {
send_response(conn, 400, "error: invalid HTTP endpoint\n");
flb_sds_destroy(tag);
mk_mem_free(uri);
return -1;
}
}
else {
/* HEAD, PUT, PATCH, and DELETE methods are prohibited to use.*/
flb_sds_destroy(tag);
mk_mem_free(uri);
send_response(conn, 400, "error: invalid HTTP method\n");
return -1;
}
flb_sds_destroy(tag);
mk_mem_free(uri);
return ret;
}
/*
* Handle an incoming request which has resulted in an http parser error.
*/
int splunk_prot_handle_error(struct flb_splunk *ctx, struct splunk_conn *conn,
struct mk_http_session *session,
struct mk_http_request *request)
{
send_response(conn, 400, "error: invalid request\n");
return -1;
}
/* New gen HTTP server */
static int send_response_ng(struct flb_http_response *response,
int http_status,
char *message)
{
flb_http_response_set_status(response, http_status);
if (http_status == 201) {
flb_http_response_set_message(response, "Created");
}
else if (http_status == 200) {
flb_http_response_set_message(response, "OK");
}
else if (http_status == 204) {
flb_http_response_set_message(response, "No Content");
}
else if (http_status == 400) {
flb_http_response_set_message(response, "Bad Request");
}
if (message != NULL) {
flb_http_response_set_body(response,
(unsigned char *) message,
strlen(message));
}
flb_http_response_commit(response);
return 0;
}
static int send_json_message_response_ng(struct flb_http_response *response,
int http_status,
char *message)
{
flb_http_response_set_status(response, http_status);
if (http_status == 201) {
flb_http_response_set_message(response, "Created");
}
else if (http_status == 200) {
flb_http_response_set_message(response, "OK");
}
else if (http_status == 204) {
flb_http_response_set_message(response, "No Content");
}
else if (http_status == 400) {
flb_http_response_set_message(response, "Bad Request");
}
flb_http_response_set_header(response,
"content-type", 0,
"application/json", 0);
if (message != NULL) {
flb_http_response_set_body(response,
(unsigned char *) message,
strlen(message));
}
flb_http_response_commit(response);
return 0;
}
static int validate_auth_header_ng(struct flb_splunk *ctx, struct flb_http_request *request)
{
struct mk_list *tmp;
struct mk_list *head;
char *auth_header;
struct flb_splunk_tokens *splunk_token;
if (mk_list_size(&ctx->auth_tokens) == 0) {
return SPLUNK_AUTH_UNAUTH;
}
auth_header = flb_http_request_get_header(request, "authorization");
if (auth_header == NULL) {
return SPLUNK_AUTH_MISSING_CRED;
}
if (auth_header != NULL && strlen(auth_header) > 0) {
mk_list_foreach_safe(head, tmp, &ctx->auth_tokens) {
splunk_token = mk_list_entry(head, struct flb_splunk_tokens, _head);
if (strncmp(splunk_token->header,
auth_header,
strlen(splunk_token->header)) == 0) {
return SPLUNK_AUTH_SUCCESS;
}
}
return SPLUNK_AUTH_UNAUTHORIZED;
}
else {
return SPLUNK_AUTH_MISSING_CRED;
}
return SPLUNK_AUTH_SUCCESS;
}
static int process_hec_payload_ng(struct flb_http_request *request,
struct flb_http_response *response,
flb_sds_t tag,
struct flb_splunk *ctx)
{
int type = -1;
int ret = 0;
size_t size = 0;
char *auth_header;
type = HTTP_CONTENT_UNKNOWN;
if (request->content_type != NULL) {
if (strcasecmp(request->content_type, "application/json") == 0) {
type = HTTP_CONTENT_JSON;
}
else if (strcasecmp(request->content_type, "text/plain") == 0) {
type = HTTP_CONTENT_TEXT;
}
else {
/* Not necessary to specify content-type for Splunk HEC. */
flb_plg_debug(ctx->ins, "Mark as unknown type for ingested payloads");
}
}