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https://git.rwth-aachen.de/acs/public/villas/node/
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102 lines
No EOL
3.6 KiB
C
102 lines
No EOL
3.6 KiB
C
/** Setup interface queuing desciplines for 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 2017, 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 fpga Kernel @{ */
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#pragma once
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#include <stdint.h>
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#include <netlink/route/qdisc.h>
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#include <netlink/route/classifier.h>
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#include <libconfig.h>
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typedef uint32_t tc_hdl_t;
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struct interface;
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/** Parse network emulator (netem) settings.
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*
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* @param cfg A libconfig 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 tc_parse(config_setting_t *cfg, struct rtnl_qdisc **ne);
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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 * tc_print(struct rtnl_qdisc *ne);
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/** Remove all queuing disciplines and filters.
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*
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* @param i The interface
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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 tc_reset(struct interface *i);
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/** Create a priority (prio) queueing discipline.
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*
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* @param i[in] The interface
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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 for the new qdisc
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* @param parent[in] Make this qdisc a child of this class
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* @param bands[in] The number of classes for this new qdisc
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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 tc_prio(struct interface *i, struct rtnl_qdisc **qd, tc_hdl_t handle, tc_hdl_t, int bands);
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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 tc_netem(struct interface *i, struct rtnl_qdisc **qd, tc_hdl_t handle, tc_hdl_t parent);
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/** Add a new filter based on the netfilter mark.
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*
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* @param i The interface to which this classifier is applied to.
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* @param cls[in,out] The libnl3 object of the new prio qdisc.
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* @param flowid The destination class for matched traffic
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* @param mark The netfilter firewall mark (sometime called 'fwmark')
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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 tc_mark(struct interface *i, struct rtnl_cls **cls, tc_hdl_t flowid, uint32_t mark);
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/** @} */ |