mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-23 00:00:01 +01:00
Steffen Vogel
c2516799ee
git-svn-id: https://zerberus.eonerc.rwth-aachen.de:8443/svn/s2ss/trunk@155 8ec27952-4edc-4aab-86aa-e87bb2611832
109 lines
3.2 KiB
C
109 lines
3.2 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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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014, Institute for Automation of Complex Power Systems, EONERC
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* @file
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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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/** A type alias for TC handles.
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*
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* TC handles are used to construct a tree
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* of classes, qdiscs and filters.
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*/
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typedef uint32_t tc_hdl_t;
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/** Concatenate 16 bit minor and majar parts to a 32 bit tc handle */
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#define TC_HDL(maj, min) ((maj & 0xFFFF) << 16 | (min & 0xFFFF))
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/** Get the major part of a tc handle */
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#define TC_HDL_MAJ(h) ((h >> 16) & 0xFFFF)
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/** Get the minor part of a tc handle */
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#define TC_HDL_MIN(h) ((h >> 0) & 0xFFFF)
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/** The root handle */
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#define TC_HDL_ROOT (0xFFFFFFFFU)
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/* Bitfield for valid fields in struct netem */
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#define TC_NETEM_DELAY (1 << 0) /**< netem::delay is valid @see netem::valid */
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#define TC_NETEM_JITTER (1 << 1) /**< netem::jitter is valid @see netem::valid */
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#define TC_NETEM_DISTR (1 << 2) /**< netem::distribution is valid @see netem::valid */
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#define TC_NETEM_LOSS (1 << 3) /**< netem::loss is valid @see netem::valid */
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#define TC_NETEM_CORRUPT (1 << 4) /**< netem::corrupt is valid @see netem::valid */
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#define TC_NETEM_DUPL (1 << 5) /**< netem::duplicate is valid @see netem::valid */
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struct interface;
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/** Netem configuration settings.
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*
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* This struct is used to pass the netem configuration
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* from config_parse_netem() to tc_netem()
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*/
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struct netem {
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/** Which fields of this struct contain valid data (TC_NETEM_*). */
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char valid;
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/** Delay distribution: uniform, normal, pareto, paretonormal */
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const char *distribution;
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/** Added delay (uS) */
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int delay;
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/** Delay jitter (uS) */
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int jitter;
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/** Random loss probability (%) */
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int loss;
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/** Packet corruption probability (%) */
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int corrupt;
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/** Packet duplication probability (%) */
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int duplicate;
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};
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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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* @return
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* - 0 on success
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* - otherwise an error occured
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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 The interface
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* @param handle The handle for the new qdisc
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* @param bands The number of classes for this new qdisc
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* @return
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* - 0 on success
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* - otherwise an error occured
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*/
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int tc_prio(struct interface *i, tc_hdl_t handle, int bands);
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/** Add a new network emulator (netem) discipline.
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*
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* @param i The interface
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* @param parent Make this qdisc a child of
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* @param em The netem settings
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* @return
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* - 0 on success
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* - otherwise an error occured
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*/
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int tc_netem(struct interface *i, tc_hdl_t parent, struct netem *em);
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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
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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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* @return
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* - 0 on success
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* - otherwise an error occured
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*/
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int tc_mark(struct interface *i, tc_hdl_t flowid, int mark);
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#endif /* _TC_H_ */
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