158 lines
3.7 KiB
C
158 lines
3.7 KiB
C
/*
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* Copyright (C) 2012 Martin Willi
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* Copyright (C) 2012 revosec AG
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "error_notify_socket.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include <errno.h>
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#include <daemon.h>
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#include <threading/thread.h>
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#include <threading/mutex.h>
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#include <collections/linked_list.h>
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#include <processing/jobs/callback_job.h>
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#include "error_notify_msg.h"
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typedef struct private_error_notify_socket_t private_error_notify_socket_t;
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/**
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* Private data of an error_notify_socket_t object.
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*/
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struct private_error_notify_socket_t {
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/**
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* Public error_notify_socket_t interface.
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*/
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error_notify_socket_t public;
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/**
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* Service accepting connections
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*/
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stream_service_t *service;
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/**
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* List of connected clients, as stream_t
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*/
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linked_list_t *connected;
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/**
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* Mutex to lock clients list
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*/
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mutex_t *mutex;
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};
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METHOD(error_notify_socket_t, has_listeners, bool,
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private_error_notify_socket_t *this)
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{
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int count;
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this->mutex->lock(this->mutex);
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count = this->connected->get_count(this->connected);
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this->mutex->unlock(this->mutex);
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return count != 0;
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}
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METHOD(error_notify_socket_t, notify, void,
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private_error_notify_socket_t *this, error_notify_msg_t *msg)
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{
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enumerator_t *enumerator;
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stream_t *stream;
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this->mutex->lock(this->mutex);
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enumerator = this->connected->create_enumerator(this->connected);
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while (enumerator->enumerate(enumerator, &stream))
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{
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if (!stream->write_all(stream, msg, sizeof(*msg)))
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{
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switch (errno)
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{
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case ECONNRESET:
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case EPIPE:
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/* disconnect, remove this listener */
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this->connected->remove_at(this->connected, enumerator);
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stream->destroy(stream);
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break;
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default:
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DBG1(DBG_CFG, "sending notify failed: %s", strerror(errno));
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break;
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}
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break;
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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/**
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* Accept client connections
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*/
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static bool on_accept(private_error_notify_socket_t *this, stream_t *stream)
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{
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this->mutex->lock(this->mutex);
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this->connected->insert_last(this->connected, stream);
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this->mutex->unlock(this->mutex);
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return TRUE;
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}
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METHOD(error_notify_socket_t, destroy, void,
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private_error_notify_socket_t *this)
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{
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DESTROY_IF(this->service);
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this->connected->destroy_offset(this->connected, offsetof(stream_t, destroy));
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this->mutex->destroy(this->mutex);
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free(this);
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}
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/**
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* See header
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*/
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error_notify_socket_t *error_notify_socket_create()
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{
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private_error_notify_socket_t *this;
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char *uri;
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INIT(this,
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.public = {
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.notify = _notify,
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.has_listeners = _has_listeners,
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.destroy = _destroy,
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},
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.connected = linked_list_create(),
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.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
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);
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uri = lib->settings->get_str(lib->settings,
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"%s.plugins.error-notify.socket", "unix://" ERROR_NOTIFY_SOCKET,
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lib->ns);
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this->service = lib->streams->create_service(lib->streams, uri, 10);
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if (!this->service)
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{
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DBG1(DBG_CFG, "creating duplicheck socket failed");
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destroy(this);
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return NULL;
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}
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this->service->on_accept(this->service, (stream_service_cb_t)on_accept,
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this, JOB_PRIO_CRITICAL, 1);
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return &this->public;
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}
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