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/*
* Copyright (C) 2012 Martin Willi
* Copyright (C) 2012 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 "error_notify_socket.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <errno.h>
#include <daemon.h>
#include <threading/thread.h>
#include <threading/mutex.h>
#include <collections/linked_list.h>
#include <processing/jobs/callback_job.h>
#include "error_notify_msg.h"
typedef struct private_error_notify_socket_t private_error_notify_socket_t;
/**
* Private data of an error_notify_socket_t object.
*/
struct private_error_notify_socket_t {
/**
* Public error_notify_socket_t interface.
*/
error_notify_socket_t public;
/**
* Service accepting connections
*/
stream_service_t *service;
/**
* List of connected clients, as stream_t
*/
linked_list_t *connected;
/**
* Mutex to lock clients list
*/
mutex_t *mutex;
};
METHOD(error_notify_socket_t, has_listeners, bool,
private_error_notify_socket_t *this)
{
int count;
this->mutex->lock(this->mutex);
count = this->connected->get_count(this->connected);
this->mutex->unlock(this->mutex);
return count != 0;
}
METHOD(error_notify_socket_t, notify, void,
private_error_notify_socket_t *this, error_notify_msg_t *msg)
{
enumerator_t *enumerator;
stream_t *stream;
this->mutex->lock(this->mutex);
enumerator = this->connected->create_enumerator(this->connected);
while (enumerator->enumerate(enumerator, &stream))
{
if (!stream->write_all(stream, msg, sizeof(*msg)))
{
switch (errno)
{
case ECONNRESET:
case EPIPE:
/* disconnect, remove this listener */
this->connected->remove_at(this->connected, enumerator);
stream->destroy(stream);
break;
default:
DBG1(DBG_CFG, "sending notify failed: %s", strerror(errno));
break;
}
}
}
enumerator->destroy(enumerator);
this->mutex->unlock(this->mutex);
}
/**
* Accept client connections
*/
static bool on_accept(private_error_notify_socket_t *this, stream_t *stream)
{
this->mutex->lock(this->mutex);
this->connected->insert_last(this->connected, stream);
this->mutex->unlock(this->mutex);
return TRUE;
}
METHOD(error_notify_socket_t, destroy, void,
private_error_notify_socket_t *this)
{
DESTROY_IF(this->service);
this->connected->destroy_offset(this->connected, offsetof(stream_t, destroy));
this->mutex->destroy(this->mutex);
free(this);
}
/**
* See header
*/
error_notify_socket_t *error_notify_socket_create()
{
private_error_notify_socket_t *this;
char *uri;
INIT(this,
.public = {
.notify = _notify,
.has_listeners = _has_listeners,
.destroy = _destroy,
},
.connected = linked_list_create(),
.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
);
uri = lib->settings->get_str(lib->settings,
"%s.plugins.error-notify.socket", "unix://" ERROR_NOTIFY_SOCKET,
lib->ns);
this->service = lib->streams->create_service(lib->streams, uri, 10);
if (!this->service)
{
DBG1(DBG_CFG, "creating error-notify socket failed");
destroy(this);
return NULL;
}
this->service->on_accept(this->service, (stream_service_cb_t)on_accept,
this, JOB_PRIO_CRITICAL, 1);
return &this->public;
}
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