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https://git.rwth-aachen.de/acs/public/villas/node/
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82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
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/**
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* Traffic control: setup interface queuing desciplines
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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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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "utils.h"
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#include "if.h"
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#include "tc.h"
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int tc_reset(struct interface *i)
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{
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char cmd[128];
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snprintf(cmd, sizeof(cmd), "tc qdisc del dev %s root", i->name);
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debug(6, "system: %s", cmd);
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return system(cmd);
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}
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int tc_prio(struct interface *i, tc_hdl_t handle, int bands)
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{
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char cmd[128];
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int len = 0;
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len += snprintf(cmd+len, sizeof(cmd)-len,
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"tc qdisc add dev %s root handle %u prio bands %u priomap",
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i->name, TC_HDL_MAJ(handle), bands);
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for (int i = 0; i < bands; i++)
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len += snprintf(cmd+len, sizeof(cmd)-len, " 0");
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debug(6, "system: %s", cmd);
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return system(cmd);
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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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{
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int len = 0;
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char cmd[256];
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len += snprintf(cmd+len, sizeof(cmd)-len,
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"tc qdisc add dev %s parent %u:%u netem",
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i->name, TC_HDL_MAJ(parent), TC_HDL_MIN(parent));
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if (em->valid & TC_NETEM_LIMIT)
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len += snprintf(cmd+len, sizeof(cmd)-len, " limit %u", em->limit);
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if (em->valid & TC_NETEM_DELAY) {
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len += snprintf(cmd+len, sizeof(cmd)-len, " delay %u", em->delay);
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if (em->valid & TC_NETEM_JITTER)
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len += snprintf(cmd+len, sizeof(cmd)-len, " %u", em->jitter);
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if (em->valid & TC_NETEM_DISTR)
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len += snprintf(cmd+len, sizeof(cmd)-len, " distribution %s", em->distribution);
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}
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if (em->valid & TC_NETEM_LOSS)
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len += snprintf(cmd+len, sizeof(cmd)-len, " loss random %u", em->loss);
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if (em->valid & TC_NETEM_DUPL)
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len += snprintf(cmd+len, sizeof(cmd)-len, " duplicate %u", em->duplicate);
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if (em->valid & TC_NETEM_CORRUPT)
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len += snprintf(cmd+len, sizeof(cmd)-len, " corrupt %u", em->corrupt);
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debug(6, "system: %s", cmd);
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return system(cmd);
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}
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int tc_mark(struct interface *i, tc_hdl_t flowid, int mark)
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{
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char cmd[128];
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snprintf(cmd, sizeof(cmd),
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"tc filter add dev %s protocol ip handle %u fw flowid %u:%u",
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i->name, mark, TC_HDL_MAJ(flowid), TC_HDL_MIN(flowid));
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debug(6, "system: %s", cmd);
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return system(cmd);
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}
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