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https://git.rwth-aachen.de/acs/public/villas/node/
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64 lines
1.9 KiB
C++
64 lines
1.9 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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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <cstdint>
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#include <netlink/route/classifier.h>
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#include <netlink/route/qdisc.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 json 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 *json);
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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,
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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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