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/*
* Copyright (C) 2013 Martin Willi
* Copyright (C) 2013 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 "stream_manager.h"
#include "stream_tcp.h"
#include "stream_service_tcp.h"
#ifndef WIN32
# include "stream_unix.h"
# include "stream_service_unix.h"
#endif
#include <threading/rwlock.h>
typedef struct private_stream_manager_t private_stream_manager_t;
/**
* Private data of an stream_manager_t object.
*/
struct private_stream_manager_t {
/**
* Public stream_manager_t interface.
*/
stream_manager_t public;
/**
* List of registered stream constructors, as stream_entry_t
*/
linked_list_t *streams;
/**
* List of registered service constructors, as service_entry_t
*/
linked_list_t *services;
/**
* Lock for all lists
*/
rwlock_t *lock;
};
/**
* Registered stream backend
*/
typedef struct {
/** URI prefix */
char *prefix;
/** constructor function */
stream_constructor_t create;
} stream_entry_t;
/**
* Registered service backend
*/
typedef struct {
/** URI prefix */
char *prefix;
/** constructor function */
stream_service_constructor_t create;
} service_entry_t;
METHOD(stream_manager_t, connect_, stream_t*,
private_stream_manager_t *this, char *uri)
{
enumerator_t *enumerator;
stream_entry_t *entry;
stream_t *stream = NULL;
this->lock->read_lock(this->lock);
enumerator = this->streams->create_enumerator(this->streams);
while (enumerator->enumerate(enumerator, &entry))
{
if (strpfx(uri, entry->prefix))
{
stream = entry->create(uri);
if (stream)
{
break;
}
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
return stream;
}
METHOD(stream_manager_t, create_service, stream_service_t*,
private_stream_manager_t *this, char *uri, int backlog)
{
enumerator_t *enumerator;
service_entry_t *entry;
stream_service_t *service = NULL;
this->lock->read_lock(this->lock);
enumerator = this->services->create_enumerator(this->services);
while (enumerator->enumerate(enumerator, &entry))
{
if (strpfx(uri, entry->prefix))
{
service = entry->create(uri, backlog);
if (service)
{
break;
}
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
return service;
}
METHOD(stream_manager_t, add_stream, void,
private_stream_manager_t *this, char *prefix, stream_constructor_t create)
{
stream_entry_t *entry;
INIT(entry,
.prefix = strdup(prefix),
.create = create,
);
this->lock->write_lock(this->lock);
this->streams->insert_last(this->streams, entry);
this->lock->unlock(this->lock);
}
METHOD(stream_manager_t, remove_stream, void,
private_stream_manager_t *this, stream_constructor_t create)
{
enumerator_t *enumerator;
stream_entry_t *entry;
this->lock->write_lock(this->lock);
enumerator = this->streams->create_enumerator(this->streams);
while (enumerator->enumerate(enumerator, &entry))
{
if (entry->create == create)
{
this->streams->remove_at(this->streams, enumerator);
free(entry->prefix);
free(entry);
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
}
METHOD(stream_manager_t, add_service, void,
private_stream_manager_t *this, char *prefix,
stream_service_constructor_t create)
{
service_entry_t *entry;
INIT(entry,
.prefix = strdup(prefix),
.create = create,
);
this->lock->write_lock(this->lock);
this->services->insert_last(this->services, entry);
this->lock->unlock(this->lock);
}
METHOD(stream_manager_t, remove_service, void,
private_stream_manager_t *this, stream_service_constructor_t create)
{
enumerator_t *enumerator;
service_entry_t *entry;
this->lock->write_lock(this->lock);
enumerator = this->services->create_enumerator(this->services);
while (enumerator->enumerate(enumerator, &entry))
{
if (entry->create == create)
{
this->services->remove_at(this->services, enumerator);
free(entry->prefix);
free(entry);
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
}
METHOD(stream_manager_t, destroy, void,
private_stream_manager_t *this)
{
remove_stream(this, stream_create_tcp);
remove_service(this, stream_service_create_tcp);
#ifndef WIN32
remove_stream(this, stream_create_unix);
remove_service(this, stream_service_create_unix);
#endif
this->streams->destroy(this->streams);
this->services->destroy(this->services);
this->lock->destroy(this->lock);
free(this);
}
/**
* See header
*/
stream_manager_t *stream_manager_create()
{
private_stream_manager_t *this;
INIT(this,
.public = {
.connect = _connect_,
.create_service = _create_service,
.add_stream = _add_stream,
.remove_stream = _remove_stream,
.add_service = _add_service,
.remove_service = _remove_service,
.destroy = _destroy,
},
.streams = linked_list_create(),
.services = linked_list_create(),
.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
);
add_stream(this, "tcp://", stream_create_tcp);
add_service(this, "tcp://", stream_service_create_tcp);
#ifndef WIN32
add_stream(this, "unix://", stream_create_unix);
add_service(this, "unix://", stream_service_create_unix);
#endif
return &this->public;
}
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