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VILLASnode/include/villas/kernel/tc.hpp

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2.7 KiB
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/** Setup interface queuing desciplines for network emulation
*
* We use the firewall mark to apply individual netem qdiscs
* per node. Every node uses an own BSD socket.
* By using so SO_MARK socket option (see socket(7))
* we can classify traffic originating from a node seperately.
*
* @file
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
* @license GNU General Public License (version 3)
*
* VILLASnode
*
* 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 3 of the License, or
* any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
/** @addtogroup kernel Kernel
* @{
*/
#pragma once
#include <cstdint>
#include <netlink/route/qdisc.h>
#include <netlink/route/classifier.h>
#include <jansson.h>
namespace villas {
namespace kernel {
/* Forward declarations */
class Interface;
namespace tc {
typedef uint32_t tc_hdl_t;
/** Remove all queuing disciplines and filters.
*
* @param i The interface
* @retval 0 Success. Everything went well.
* @retval <0 Error. Something went wrong.
*/
int reset(Interface *i);
/** Create a priority (prio) queueing discipline.
*
* @param i[in] The interface
* @param qd[in,out] The libnl3 object of the new prio qdisc.
* @param handle[in] The handle for the new qdisc
* @param parent[in] Make this qdisc a child of this class
* @param bands[in] The number of classes for this new qdisc
* @retval 0 Success. Everything went well.
* @retval <0 Error. Something went wrong.
*/
int prio(Interface *i, struct rtnl_qdisc **qd, tc_hdl_t handle, tc_hdl_t, int bands);
/** Add a new filter based on the netfilter mark.
*
* @param i The interface to which this classifier is applied to.
* @param cls[in,out] The libnl3 object of the new prio qdisc.
* @param flowid The destination class for matched traffic
* @param mark The netfilter firewall mark (sometime called 'fwmark')
* @retval 0 Success. Everything went well.
* @retval <0 Error. Something went wrong.
*/
int mark(Interface *i, struct rtnl_cls **cls, tc_hdl_t flowid, uint32_t mark);
} /* namespace tc */
} /* namespace kernel */
} /* namespace villas */
/** @} */