mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
/** Setup network emulation
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*
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* We use the firewall mark to apply individual netem qdiscs
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* per node. Every node uses an own BSD socket.
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* By using so SO_MARK socket option (see socket(7))
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* we can classify traffic originating from a node seperately.
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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/** @addtogroup kernel Kernel
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* @{
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*/
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#pragma once
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#include <cstdint>
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#include <netlink/route/qdisc.h>
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#include <netlink/route/classifier.h>
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#include <jansson.h>
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namespace villas {
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namespace kernel {
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/* Forward declarations */
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class Interface;
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namespace tc {
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typedef uint32_t tc_hdl_t;
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/** Parse network emulator (netem) settings.
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*
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* @param cfg A jansson object containing the settings.
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* @param[out] ne A pointer to a libnl3 qdisc object where setting will be written to.
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int netem_parse(struct rtnl_qdisc **ne, json_t *cfg);
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/** Print network emulator (netem) setting into buffer.
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*
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* @param tc A pointer to the libnl3 qdisc object where settings will be read from.
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* @return A pointer to a string which must be freed() by the caller.
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*/
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char * netem_print(struct rtnl_qdisc *ne);
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/** Add a new network emulator (netem) discipline.
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*
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* @param i[in] The interface to which this qdisc will be added.
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* @param qd[in,out] The libnl3 object of the new prio qdisc.
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* @param handle[in] The handle of the new qdisc.
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* @param parent[in] Make this qdisc a child of this class
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int netem(Interface *i, struct rtnl_qdisc **qd, tc_hdl_t handle, tc_hdl_t parent);
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int netem_set_delay_distribution(struct rtnl_qdisc *qdisc, json_t *json);
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} /* namespace tc */
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} /* namespace kernel */
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} /* namespace villas */
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/** @} */
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