rc80211.h File Reference

Rate-control algorithm prototype for 802.11. More...

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER)
struct rc80211_ctx *	rc80211_init (struct net80211_device *dev)
void	rc80211_update_tx (struct net80211_device *dev, int retries, int rc)
	Update rate-control state for transmitted packet.
void	rc80211_update_rx (struct net80211_device *dev, int retry, u16 rate)
	Update rate-control state for received packet.
void	rc80211_free (struct rc80211_ctx *ctx)
	Free rate-control context.

Detailed Description

Rate-control algorithm prototype for 802.11.

Definition in file rc80211.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

rc80211_init()

struct rc80211_ctx * rc80211_init

(

struct net80211_device *

dev

)

References ctx, rc, and u16.

rc80211_update_tx()

void rc80211_update_tx	(	struct net80211_device *	dev,
		int	retries,
		int	rc )

Update rate-control state for transmitted packet.

Parameters

dev	802.11 device
retries	Number of times packet was transmitted before success
rc	Return status code for transmission

Definition at line 317 of file rc80211.c.

{
        struct rc80211_ctx *ctx = dev->rctl;
 
        if ( ! ctx->started )
                return;
 
        rc80211_update ( dev, TX, dev->rate, retries, rc );
 
        /* Check if the last RC_TX_EMERG_FAIL packets have all failed */
        if ( ! ( ctx->goodness[TX][dev->rate] &
                 ( ( 1 << ( 2 * RC_TX_EMERG_FAIL ) ) - 1 ) ) ) {
                if ( dev->rate == 0 )
                        DBGC ( dev->rctl, "802.11 RC %p saw %d consecutive "
                               "failed TX, but cannot lower rate any further\n",
                               dev->rctl, RC_TX_EMERG_FAIL );
                else {
                        DBGC ( dev->rctl, "802.11 RC %p lowering rate (%d->%d "
                               "Mbps) due to %d consecutive TX failures\n",
                               dev->rctl, dev->rates[dev->rate] / 10,
                               dev->rates[dev->rate - 1] / 10,
                               RC_TX_EMERG_FAIL );
 
                        rc80211_set_rate ( dev, dev->rate - 1 );
                }
        }
}

References ctx, DBGC, net80211_device::rate, net80211_device::rates, rc, rc80211_set_rate(), rc80211_update(), RC_TX_EMERG_FAIL, net80211_device::rctl, and TX.

Referenced by net80211_tx_complete().

rc80211_update_rx()

void rc80211_update_rx	(	struct net80211_device *	dev,
		int	retry,
		u16	rate )

Update rate-control state for received packet.

Parameters

dev	802.11 device
retry	Whether the received packet had been retransmitted
rate	Rate at which packet was received, in 100 kbps units

Definition at line 352 of file rc80211.c.

{
        int ridx;
 
        for ( ridx = 0; ridx < dev->nr_rates && dev->rates[ridx] != rate;
              ridx++ )
                ;
        if ( ridx >= dev->nr_rates )
                return;         /* couldn't find the rate */
 
        rc80211_update ( dev, RX, ridx, retry, 0 );
}

References net80211_device::nr_rates, net80211_device::rates, rc80211_update(), RX, and u16.

Referenced by net80211_rx().

rc80211_free()

void rc80211_free

(

struct rc80211_ctx *

ctx

)

Free rate-control context.

Parameters

ctx	Rate-control context

Definition at line 370 of file rc80211.c.

{
        free ( ctx );
}

References ctx, and free.

Referenced by net80211_free().