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/*
* Copyright (C) 2014 Martin Willi
* Copyright (C) 2014 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "vici_logger.h"
#include "vici_builder.h"
#include <daemon.h>
#include <threading/mutex.h>
#include <processing/jobs/callback_job.h>
typedef struct private_vici_logger_t private_vici_logger_t;
/**
* Private data of an vici_logger_t object.
*/
struct private_vici_logger_t {
/**
* Public vici_logger_t interface.
*/
vici_logger_t public;
/**
* Dispatcher
*/
vici_dispatcher_t *dispatcher;
/**
* Recursiveness avoidance counter
*/
int recursive;
/**
* List of messages to raise async events
*/
linked_list_t *queue;
/**
* Mutex to synchronize logging
*/
mutex_t *mutex;
};
/**
* Async callback to raise events for queued messages
*/
static job_requeue_t raise_events(private_vici_logger_t *this)
{
vici_message_t *message;
u_int count;
this->mutex->lock(this->mutex);
count = this->queue->get_count(this->queue);
this->queue->remove_first(this->queue, (void**)&message);
this->mutex->unlock(this->mutex);
if (count > 0)
{
this->dispatcher->raise_event(this->dispatcher, "log", 0, message);
}
if (count > 1)
{
return JOB_REQUEUE_DIRECT;
}
return JOB_REQUEUE_NONE;
}
/**
* Queue a message for async processing
*/
static void queue_messsage(private_vici_logger_t *this, vici_message_t *message)
{
this->queue->insert_last(this->queue, message);
if (this->queue->get_count(this->queue) == 1)
{
lib->processor->queue_job(lib->processor, (job_t*)
callback_job_create((callback_job_cb_t)raise_events,
this, NULL, NULL));
}
}
METHOD(logger_t, log_, void,
private_vici_logger_t *this, debug_t group, level_t level, int thread,
ike_sa_t* ike_sa, const char *msg)
{
if (!this->dispatcher->has_event_listeners(this->dispatcher, "log"))
{
return;
}
this->mutex->lock(this->mutex);
/* avoid recursive invocations by the vici subsystem */
if (this->recursive++ == 0)
{
vici_message_t *message;
vici_builder_t *builder;
builder = vici_builder_create();
builder->add_kv(builder, "group", "%N", debug_names, group);
builder->add_kv(builder, "level", "%d", level);
builder->add_kv(builder, "thread", "%d", thread);
if (ike_sa)
{
builder->add_kv(builder, "ikesa-name", "%s",
ike_sa->get_name(ike_sa));
builder->add_kv(builder, "ikesa-uniqueid", "%u",
ike_sa->get_unique_id(ike_sa));
}
builder->add_kv(builder, "msg", "%s", msg);
message = builder->finalize(builder);
if (message)
{
queue_messsage(this, message);
}
}
this->recursive--;
this->mutex->unlock(this->mutex);
}
METHOD(logger_t, get_level, level_t,
private_vici_logger_t *this, debug_t group)
{
/* anything higher might produce a loop as sending messages or listening
* for clients might cause log messages itself */
return LEVEL_CTRL;
}
/**
* (Un-)register dispatcher functions/events
*/
static void manage_commands(private_vici_logger_t *this, bool reg)
{
this->dispatcher->manage_event(this->dispatcher, "log", reg);
}
METHOD(vici_logger_t, destroy, void,
private_vici_logger_t *this)
{
manage_commands(this, FALSE);
this->queue->destroy_offset(this->queue, offsetof(vici_message_t, destroy));
this->mutex->destroy(this->mutex);
free(this);
}
/**
* See header
*/
vici_logger_t *vici_logger_create(vici_dispatcher_t *dispatcher)
{
private_vici_logger_t *this;
INIT(this,
.public = {
.logger = {
.log = _log_,
.get_level = _get_level,
},
.destroy = _destroy,
},
.dispatcher = dispatcher,
.queue = linked_list_create(),
.mutex = mutex_create(MUTEX_TYPE_RECURSIVE),
);
manage_commands(this, TRUE);
return &this->public;
}
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