mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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Steffen Vogel
bfb0221ccf
The new versions of those string concatenating functions are using realloc() to dynamically resize the string buffer if needed. We don't use the stack anymore.
87 lines
3.1 KiB
C
87 lines
3.1 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 2014-2015, Institute for Automation of Complex Power Systems, EONERC
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* This file is part of S2SS. All Rights Reserved. Proprietary and confidential.
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* Unauthorized copying of this file, via any medium is strictly prohibited.
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*********************************************************************************/
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#ifndef _TC_H_
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#define _TC_H_
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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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#endif /* _TC_H_ */
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