Structure used to define an EVE output file type plugin. More...

#include <output-eve.h>

Public Member Functions
	TAILQ_ENTRY (SCEveFileType_) entries

Data Fields
const char *	name
	The name of the output, used in the configuration. More...

int(*	Init )(const ConfNode conf, const bool threaded, void *init_data)
	Function to initialize this filetype. More...

int(*	ThreadInit )(const void init_data, const ThreadId thread_id, void *thread_data)
	Initialize thread specific data. More...

int(*	Write )(const char buffer, const int buffer_len, const void init_data, void *thread_data)
	Called for each EVE log record. More...

void(*	ThreadDeinit )(const void init_data, void thread_data)
	Called to deinitialize each thread. More...

void(*	Deinit )(void *init_data)
	Final call to deinitialize this filetype. More...

Detailed Description

Structure used to define an EVE output file type plugin.

EVE filetypes implement an object with a file-like interface and are used to output EVE log records to files, syslog, or database. They can be built-in such as the syslog (see SyslogInitialize()) and nullsink (see NullLogInitialize()) outputs, registered by a library user or dynamically loaded as a plugin.

The life cycle of an EVE filetype is:

Init: called once for each EVE instance using this filetype
ThreadInit: called once for each output thread
Write: called for each log record
ThreadInit: called once for each output thread on exit
Deinit: called once for each EVE instance using this filetype on exit

Examples:

built-in syslog: src/output-eve-syslog.c
built-in nullsink: src/output-eve-null.c
example plugin: examples/plugins/c-json-filetype/filetype.c

Multi-Threaded Note:

The EVE logging system can be configured by the Suricata user to run in threaded or non-threaded modes. In the default non-threaded mode, ThreadInit will only be called once and the filetype does not need to be concerned with threads.

However, in threaded mode, ThreadInit will be called multiple times and the filetype needs to be thread aware and thread-safe. If utilizing a unique resource such as a file for each thread then you may be naturally thread safe. However, if sharing a single file handle across all threads then your filetype will have to take care of locking, etc.

Definition at line 74 of file output-eve.h.

Member Function Documentation

◆ TAILQ_ENTRY()

SCEveFileType_::TAILQ_ENTRY ( SCEveFileType_ )

Field Documentation

◆ Deinit

void(* SCEveFileType_::Deinit) (void *init_data)

Final call to deinitialize this filetype.

Called, usually on exit to deinitialize and free any resources allocated during Init.

Parameters

init_data Data setup in the call to Init.

Definition at line 167 of file output-eve.h.

Referenced by LogFileFreeCtx().

◆ Init

int(* SCEveFileType_::Init) (const ConfNode *conf, const bool threaded, void **init_data)

Function to initialize this filetype.

Parameters

conf	The ConfNode of the `eve-log` configuration section this filetype is being initialized for
threaded	Flag to specify if the EVE sub-systems is in threaded mode or not
init_data	An output pointer for filetype specific data

Return values

0	on success, -1 on failure

Definition at line 104 of file output-eve.h.

Referenced by NullLogInitialize(), PluginInit(), and SyslogInitialize().

◆ name

const char* SCEveFileType_::name

The name of the output, used in the configuration.

This name is used by the configuration file to specify the EVE filetype used.

For example:

outputs:
  - eve-log:
      filetype: my-output-name

Definition at line 89 of file output-eve.h.

Referenced by NullLogInitialize(), PluginInit(), SCEveFindFileType(), and SyslogInitialize().

◆ ThreadDeinit

void(* SCEveFileType_::ThreadDeinit) (const void *init_data, void *thread_data)

Called to deinitialize each thread.

This function will be called for each thread. It is where any resources allocated in ThreadInit should be released.

Parameters

init_data	The data setup in Init
thread_data	The data setup in ThreadInit

Definition at line 157 of file output-eve.h.

Referenced by LogFileFreeCtx().

◆ ThreadInit

int(* SCEveFileType_::ThreadInit) (const void *init_data, const ThreadId thread_id, void **thread_data)

Initialize thread specific data.

Initialize any thread specific data. For example, if implementing a file output you might open the files here, so you have one output file per thread.

Parameters

init_data	Data setup during Init
thread_id	A unique ID to differentiate this thread from others. If EVE is not in threaded mode this will be called one with a ThreadId of 0. In threaded mode the ThreadId of 0 correlates to the main Suricata thread.
thread_data	Output pointer for any data required by this thread.

Return values

0	on success, -1 on failure

Definition at line 125 of file output-eve.h.

◆ Write

int(* SCEveFileType_::Write) (const char *buffer, const int buffer_len, const void *init_data, void *thread_data)

Called for each EVE log record.

The Write function is called for each log EVE log record. The provided buffer contains a fully formatted EVE record in JSON format.

Parameters

buffer	The fully formatted JSON EVE log record
buffer_len	The length of the buffer
init_data	The data setup in the call to Init
thread_data	The data setup in the call to ThreadInit

Return values

0	on success, -1 on failure

Definition at line 144 of file output-eve.h.

Referenced by LogFileWrite().

The documentation for this struct was generated from the following file:

src/output-eve.h

Public Member Functions

Data Fields

Detailed Description

Multi-Threaded Note:

Member Function Documentation

◆ TAILQ_ENTRY()

Field Documentation

◆ Deinit

◆ Init

◆ name

◆ ThreadDeinit

◆ ThreadInit

◆ Write