For further documentation see http://linux-net.osdl.org/index.php/Netem.

Queue Limit
int	rtnl_netem_set_limit (struct rtnl_qdisc *qdisc, int limit)
	Set limit of netem qdisc.
int	rtnl_netem_get_limit (struct rtnl_qdisc *qdisc)
	Get limit of netem qdisc.
Packet Re-ordering
int	rtnl_netem_set_gap (struct rtnl_qdisc *qdisc, int gap)
	Set re-ordering gap of netem qdisc.
int	rtnl_netem_get_gap (struct rtnl_qdisc *qdisc)
	Get re-ordering gap of netem qdisc.
int	rtnl_netem_set_reorder_probability (struct rtnl_qdisc *qdisc, int prob)
	Set re-ordering probability of netem qdisc.
int	rtnl_netem_get_reorder_probability (struct rtnl_qdisc *qdisc)
	Get re-ordering probability of netem qdisc.
int	rtnl_netem_set_reorder_correlation (struct rtnl_qdisc *qdisc, int prob)
	Set re-order correlation probability of netem qdisc.
int	rtnl_netem_get_reorder_correlation (struct rtnl_qdisc *qdisc)
	Get re-ordering correlation probability of netem qdisc.
Packet Loss
int	rtnl_netem_set_loss (struct rtnl_qdisc *qdisc, int prob)
	Set packet loss probability of netem qdisc.
int	rtnl_netem_get_loss (struct rtnl_qdisc *qdisc)
	Get packet loss probability of netem qdisc.
int	rtnl_netem_set_loss_correlation (struct rtnl_qdisc *qdisc, int prob)
	Set packet loss correlation probability of netem qdisc.
int	rtnl_netem_get_loss_correlation (struct rtnl_qdisc *qdisc)
	Get packet loss correlation probability of netem qdisc.
Packet Duplication
int	rtnl_netem_set_duplicate (struct rtnl_qdisc *qdisc, int prob)
	Set packet duplication probability of netem qdisc.
int	rtnl_netem_get_duplicate (struct rtnl_qdisc *qdisc)
	Get packet duplication probability of netem qdisc.
int	rtnl_netem_set_duplicate_correlation (struct rtnl_qdisc *qdisc, int prob)
	Set packet duplication correlation probability of netem qdisc.
int	rtnl_netem_get_duplicate_correlation (struct rtnl_qdisc *qdisc)
	Get packet duplication correlation probability of netem qdisc.
Packet Delay
int	rtnl_netem_set_delay (struct rtnl_qdisc *qdisc, int delay)
	Set packet delay of netem qdisc.
int	rtnl_netem_get_delay (struct rtnl_qdisc *qdisc)
	Get packet delay of netem qdisc.
int	rtnl_netem_set_jitter (struct rtnl_qdisc *qdisc, int jitter)
	Set packet delay jitter of netem qdisc.
int	rtnl_netem_get_jitter (struct rtnl_qdisc *qdisc)
	Get packet delay jitter of netem qdisc.
int	rtnl_netem_set_delay_correlation (struct rtnl_qdisc *qdisc, int prob)
	Set packet delay correlation probability of netem qdisc.
int	rtnl_netem_get_delay_correlation (struct rtnl_qdisc *qdisc)
	Get packet delay correlation probability of netem qdisc.

Function Documentation

int rtnl_netem_set_limit	(	struct rtnl_qdisc *	qdisc,
		int	limit
	)

Parameters:

qdisc	Netem qdisc to be modified.
limit	New limit in bytes.

Returns:: 0 on success or a negative error code.

Definition at line 165 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);
        
        netem->qnm_limit = limit;
        netem->qnm_mask |= SCH_NETEM_ATTR_LIMIT;

        return 0;
}

int rtnl_netem_get_limit ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Limit in bytes or a negative error code.

Definition at line 184 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LIMIT))
                return netem->qnm_limit;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_gap	(	struct rtnl_qdisc *	qdisc,
		int	gap
	)

Parameters:

qdisc	Netem qdisc to be modified.
gap	New gap in number of packets.

Returns:: 0 on success or a negative error code.

Definition at line 208 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_gap = gap;
        netem->qnm_mask |= SCH_NETEM_ATTR_GAP;

        return 0;
}

int rtnl_netem_get_gap ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Re-ordering gap in packets or a negative error code.

Definition at line 227 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_GAP))
                return netem->qnm_gap;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_reorder_probability	(	struct rtnl_qdisc *	qdisc,
		int	prob
	)

Parameters:

qdisc	Netem qdisc to be modified.
prob	New re-ordering probability.

Returns:: 0 on success or a negative error code.

Definition at line 244 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_ro.nmro_probability = prob;
        netem->qnm_mask |= SCH_NETEM_ATTR_RO_PROB;

        return 0;
}

int rtnl_netem_get_reorder_probability ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Re-ordering probability or a negative error code.

Definition at line 263 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_RO_PROB))
                return netem->qnm_ro.nmro_probability;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_reorder_correlation	(	struct rtnl_qdisc *	qdisc,
		int	prob
	)

Parameters:

qdisc	Netem qdisc to be modified.
prob	New re-ordering correlation probability.

Returns:: 0 on success or a negative error code.

Definition at line 280 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_ro.nmro_correlation = prob;
        netem->qnm_mask |= SCH_NETEM_ATTR_RO_CORR;

        return 0;
}

int rtnl_netem_get_reorder_correlation ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Re-ordering correlation probability or a negative error code.

Definition at line 299 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_RO_CORR))
                return netem->qnm_ro.nmro_correlation;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_loss	(	struct rtnl_qdisc *	qdisc,
		int	prob
	)

Parameters:

qdisc	Netem qdisc to be modified.
prob	New packet loss probability.

Returns:: 0 on success or a negative error code.

Definition at line 323 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_loss = prob;
        netem->qnm_mask |= SCH_NETEM_ATTR_LOSS;

        return 0;
}

int rtnl_netem_get_loss ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Packet loss probability or a negative error code.

Definition at line 342 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LOSS))
                return netem->qnm_loss;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_loss_correlation	(	struct rtnl_qdisc *	qdisc,
		int	prob
	)

Parameters:

qdisc	Netem qdisc to be modified.
prob	New packet loss correlation.

Returns:: 0 on success or a negative error code.

Definition at line 359 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_corr.nmc_loss = prob;
        netem->qnm_mask |= SCH_NETEM_ATTR_LOSS_CORR;

        return 0;
}

int rtnl_netem_get_loss_correlation ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Packet loss correlation probability or a negative error code.

Definition at line 378 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LOSS_CORR))
                return netem->qnm_corr.nmc_loss;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_duplicate	(	struct rtnl_qdisc *	qdisc,
		int	prob
	)

Parameters:

qdisc	Netem qdisc to be modified.
prob	New packet duplication probability.

Returns:: 0 on success or a negative error code.

Definition at line 402 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_duplicate = prob;
        netem->qnm_mask |= SCH_NETEM_ATTR_DUPLICATE;

        return 0;
}

int rtnl_netem_get_duplicate ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Packet duplication probability or a negative error code.

Definition at line 421 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_DUPLICATE))
                return netem->qnm_duplicate;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_duplicate_correlation	(	struct rtnl_qdisc *	qdisc,
		int	prob
	)

Parameters:

qdisc	Netem qdisc to be modified.
prob	New packet duplication correlation probability.

Returns:: 0 on sucess or a negative error code.

Definition at line 438 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_corr.nmc_duplicate = prob;
        netem->qnm_mask |= SCH_NETEM_ATTR_DUP_CORR;

        return 0;
}

int rtnl_netem_get_duplicate_correlation ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Packet duplication correlation probability or a negative error code.

Definition at line 457 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_DUP_CORR))
                return netem->qnm_corr.nmc_duplicate;
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_delay	(	struct rtnl_qdisc *	qdisc,
		int	delay
	)

Parameters:

qdisc	Netem qdisc to be modified.
delay	New packet delay in micro seconds.

Returns:: 0 on success or a negative error code.

Definition at line 481 of file netem.c.

References nl_us2ticks().

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_latency = nl_us2ticks(delay);
        netem->qnm_mask |= SCH_NETEM_ATTR_LATENCY;

        return 0;
}

int rtnl_netem_get_delay ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Packet delay in micro seconds or a negative error code.

Definition at line 500 of file netem.c.

References nl_ticks2us().

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LATENCY))
                return nl_ticks2us(netem->qnm_latency);
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_jitter	(	struct rtnl_qdisc *	qdisc,
		int	jitter
	)

Parameters:

qdisc	Netem qdisc to be modified.
jitter	New packet delay jitter in micro seconds.

Returns:: 0 on success or a negative error code.

Definition at line 517 of file netem.c.

References nl_us2ticks().

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_jitter = nl_us2ticks(jitter);
        netem->qnm_mask |= SCH_NETEM_ATTR_JITTER;

        return 0;
}

int rtnl_netem_get_jitter ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Packet delay jitter in micro seconds or a negative error code.

Definition at line 536 of file netem.c.

References nl_ticks2us().

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_JITTER))
                return nl_ticks2us(netem->qnm_jitter);
        else
                return nl_errno(ENOENT);
}

int rtnl_netem_set_delay_correlation	(	struct rtnl_qdisc *	qdisc,
		int	prob
	)

Parameters:

qdisc	Netem qdisc to be modified.
prob	New packet delay correlation probability.

Definition at line 552 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_alloc(qdisc);
        if (!netem)
                return nl_errno(ENOMEM);

        netem->qnm_corr.nmc_delay = prob;
        netem->qnm_mask |= SCH_NETEM_ATTR_DELAY_CORR;

        return 0;
}

int rtnl_netem_get_delay_correlation ( struct rtnl_qdisc * qdisc )

Parameters:

qdisc Netem qdisc.

Returns:: Packet delay correlation probability or a negative error code.

Definition at line 571 of file netem.c.

{
        struct rtnl_netem *netem;

        netem = netem_qdisc(qdisc);
        if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_DELAY_CORR))
                return netem->qnm_corr.nmc_delay;
        else
                return nl_errno(ENOENT);
}

Network Emulator

Queue Limit

Packet Re-ordering

Packet Loss

Packet Duplication

Packet Delay

Function Documentation