congure_reno_snd_consts_t Struct Reference

Constants for the congestion control. More...

Detailed Description

Constants for the congestion control.

Example usage:

static const congure_reno_snd_consts_t consts = {
    .fr = _my_fast_retransmit,
    .same_wnd_adv = _my_same_window_advertised,
    .init_mss = 1460,
    .cwnd_upper = 2190,
    .cwnd_lower = 1095,
    .init_ssthresh = CONGURE_WND_SIZE_MAX,
    .frthresh = 3,
}
static congure_reno_snd_t cong;
 
// ...
congure_reno_snd_setup(&cong, &const);

Definition at line 60 of file reno.h.

#include <reno.h>

Data Fields
void(*	fr )(congure_reno_snd_t *c)
	Callback to enter and perform fast retransmit.
bool(*	same_wnd_adv )(congure_reno_snd_t *c, congure_snd_ack_t *ack)
	Callback to check if the advertised window within an ACK is the same as in the context.
void(*	ss_cwnd_inc )(congure_reno_snd_t *c)
	Callback to increase congestion window in slow start.
void(*	ca_cwnd_inc )(congure_reno_snd_t *c)
	Callback to increase congestion window in congestion avoidance.
void(*	fr_cwnd_dec )(congure_reno_snd_t *c)
	Callback to reset congestion window when entering fast recovery.
unsigned	init_mss
	Initial maximum segment size of the sender in intiator-defined units.
congure_wnd_size_t	cwnd_upper
	Initial upper bound for initial window initiator-defined units.
congure_wnd_size_t	cwnd_lower
	Initial lower bound for initial window initiator-defined units.
congure_wnd_size_t	init_ssthresh
	Initial slow-start threshold in initiator-defined units.
uint8_t	frthresh
	Threshold for duplicate ACKs to go into Fast Retransmit.

Field Documentation

ca_cwnd_inc

void(* congure_reno_snd_consts_t::ca_cwnd_inc) (congure_reno_snd_t *c)

Callback to increase congestion window in congestion avoidance.

Defaults to

c->cwnd += (c->in_flight_size < c->mss)
         ? c->in_flight_size
         : c->mss;

when set to NULL

Parameters

[in]

c

The CongURE state object (callback context is at c->super.ctx)

Definition at line 111 of file reno.h.

cwnd_lower

congure_wnd_size_t congure_reno_snd_consts_t::cwnd_lower

Initial lower bound for initial window initiator-defined units.

1095 bytes in classic TCP-Reno (3/8 of the assumed MSS for Ethernet see RFC 3390).

Definition at line 154 of file reno.h.

cwnd_upper

congure_wnd_size_t congure_reno_snd_consts_t::cwnd_upper

Initial upper bound for initial window initiator-defined units.

2190 bytes in classic TCP-Reno (3/4 of the assumed MSS for Ethernet, see RFC 3390).

Definition at line 146 of file reno.h.

fr

void(* congure_reno_snd_consts_t::fr) (congure_reno_snd_t *c)

Callback to enter and perform fast retransmit.

Parameters

[in]

c

The CongURE state object (callback context is at c->super.ctx)

Definition at line 67 of file reno.h.

fr_cwnd_dec

void(* congure_reno_snd_consts_t::fr_cwnd_dec) (congure_reno_snd_t *c)

Callback to reset congestion window when entering fast recovery.

Defaults to

c->ssthresh = max(c->mss * 2, c->cwnd / 2);
c->cwnd = c->ssthresh + (3 * c->mss);

when set to NULL

Parameters

[in]

c

The CongURE state object (callback context is at c->super.ctx)

Definition at line 129 of file reno.h.

frthresh

uint8_t congure_reno_snd_consts_t::frthresh

Threshold for duplicate ACKs to go into Fast Retransmit.

Definition at line 164 of file reno.h.

init_mss

unsigned congure_reno_snd_consts_t::init_mss

Initial maximum segment size of the sender in intiator-defined units.

1460 bytes for TCP over Ethernet (see RFC 3390).

Definition at line 138 of file reno.h.

init_ssthresh

congure_wnd_size_t congure_reno_snd_consts_t::init_ssthresh

Initial slow-start threshold in initiator-defined units.

Definition at line 159 of file reno.h.

same_wnd_adv

bool(* congure_reno_snd_consts_t::same_wnd_adv) (congure_reno_snd_t *c, congure_snd_ack_t *ack)

Callback to check if the advertised window within an ACK is the same as in the context.

Parameters

[in]	c	The CongURE state object (callback context is at c->super.ctx)
[in]	ack	The ACK to check.

Definition at line 77 of file reno.h.

ss_cwnd_inc

void(* congure_reno_snd_consts_t::ss_cwnd_inc) (congure_reno_snd_t *c)

Callback to increase congestion window in slow start.

Defaults to

c->cwnd += c->mss;

when set to NULL

Parameters

[in]

c

The CongURE state object (callback context is at c->super.ctx)

Definition at line 93 of file reno.h.

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The documentation for this struct was generated from the following file:

• sys/include/congure/reno.h