182 lines
4.0 KiB
C
182 lines
4.0 KiB
C
/*
|
|
* Copyright (C) 2007 Martin Willi
|
|
* HSR Hochschule fuer Technik Rapperswil
|
|
*
|
|
* 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 <sys/types.h>
|
|
#include <netinet/in.h>
|
|
#include <libbridge.h>
|
|
|
|
#include <utils/debug.h>
|
|
#include <collections/linked_list.h>
|
|
|
|
#include "bridge.h"
|
|
|
|
typedef struct private_bridge_t private_bridge_t;
|
|
|
|
struct private_bridge_t {
|
|
/** public interface */
|
|
bridge_t public;
|
|
/** device name */
|
|
char *name;
|
|
/** list of attached interfaces */
|
|
linked_list_t *ifaces;
|
|
};
|
|
|
|
/**
|
|
* defined in iface.c
|
|
*/
|
|
bool iface_control(char *name, bool up);
|
|
|
|
METHOD(bridge_t, get_name, char*,
|
|
private_bridge_t *this)
|
|
{
|
|
return this->name;
|
|
}
|
|
|
|
METHOD(bridge_t, create_iface_enumerator, enumerator_t*,
|
|
private_bridge_t *this)
|
|
{
|
|
return this->ifaces->create_enumerator(this->ifaces);
|
|
}
|
|
|
|
METHOD(bridge_t, disconnect_iface, bool,
|
|
private_bridge_t *this, iface_t *iface)
|
|
{
|
|
enumerator_t *enumerator;
|
|
iface_t *current = NULL;
|
|
bool good = FALSE;
|
|
|
|
enumerator = this->ifaces->create_enumerator(this->ifaces);
|
|
while (enumerator->enumerate(enumerator, (void**)¤t))
|
|
{
|
|
if (current == iface)
|
|
{
|
|
if (br_del_interface(this->name, iface->get_hostif(iface)) != 0)
|
|
{
|
|
DBG1(DBG_LIB, "removing iface '%s' from bridge '%s' in kernel"
|
|
" failed: %m", iface->get_hostif(iface), this->name);
|
|
}
|
|
else
|
|
{
|
|
iface->set_bridge(iface, NULL);
|
|
this->ifaces->remove_at(this->ifaces, enumerator);
|
|
good = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (iface != current)
|
|
{
|
|
DBG1(DBG_LIB, "iface '%s' not found on bridge '%s'",
|
|
iface->get_hostif(iface), this->name);
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
return good;
|
|
}
|
|
|
|
METHOD(bridge_t, connect_iface, bool,
|
|
private_bridge_t *this, iface_t *iface)
|
|
{
|
|
if (br_add_interface(this->name, iface->get_hostif(iface)) != 0)
|
|
{
|
|
DBG1(DBG_LIB, "adding iface '%s' to bridge '%s' failed: %m",
|
|
iface->get_hostif(iface), this->name);
|
|
return FALSE;
|
|
}
|
|
iface->set_bridge(iface, &this->public);
|
|
this->ifaces->insert_last(this->ifaces, iface);
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* instance counter to (de-)initialize libbridge
|
|
*/
|
|
static int instances = 0;
|
|
|
|
METHOD(bridge_t, destroy, void,
|
|
private_bridge_t *this)
|
|
{
|
|
enumerator_t *enumerator;
|
|
iface_t *iface;
|
|
|
|
enumerator = this->ifaces->create_enumerator(this->ifaces);
|
|
while (enumerator->enumerate(enumerator, (void**)&iface))
|
|
{
|
|
if (br_del_interface(this->name, iface->get_hostif(iface)) != 0)
|
|
{
|
|
DBG1(DBG_LIB, "disconnecting iface '%s' failed: %m",
|
|
iface->get_hostif(iface));
|
|
}
|
|
iface->set_bridge(iface, NULL);
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
this->ifaces->destroy(this->ifaces);
|
|
iface_control(this->name, FALSE);
|
|
if (br_del_bridge(this->name) != 0)
|
|
{
|
|
DBG1(DBG_LIB, "deleting bridge '%s' from kernel failed: %m",
|
|
this->name);
|
|
}
|
|
free(this->name);
|
|
free(this);
|
|
if (--instances == 0)
|
|
{
|
|
br_shutdown();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* create the bridge instance
|
|
*/
|
|
bridge_t *bridge_create(char *name)
|
|
{
|
|
private_bridge_t *this;
|
|
|
|
if (instances == 0)
|
|
{
|
|
if (br_init() != 0)
|
|
{
|
|
DBG1(DBG_LIB, "libbridge initialization failed: %m");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
INIT(this,
|
|
.public = {
|
|
.get_name = _get_name,
|
|
.create_iface_enumerator = _create_iface_enumerator,
|
|
.disconnect_iface = _disconnect_iface,
|
|
.connect_iface = _connect_iface,
|
|
.destroy = _destroy,
|
|
}
|
|
);
|
|
|
|
if (br_add_bridge(name) != 0)
|
|
{
|
|
DBG1(DBG_LIB, "creating bridge '%s' failed: %m", name);
|
|
free(this);
|
|
return NULL;
|
|
}
|
|
if (!iface_control(name, TRUE))
|
|
{
|
|
DBG1(DBG_LIB, "bringing bridge '%s' up failed: %m", name);
|
|
}
|
|
|
|
this->name = strdup(name);
|
|
this->ifaces = linked_list_create();
|
|
|
|
instances++;
|
|
return &this->public;
|
|
}
|