Network device interface functions

Functions
static int	net80211_netdev_open (struct net_device *netdev)
	Open 802.11 device and start association. More...
static void	net80211_netdev_close (struct net_device *netdev)
	Close 802.11 device. More...
static int	net80211_netdev_transmit (struct net_device *netdev, struct io_buffer *iobuf)
	Transmit packet on 802.11 device. More...
static void	net80211_netdev_poll (struct net_device *netdev)
	Poll 802.11 device for received packets and completed transmissions. More...
static void	net80211_netdev_irq (struct net_device *netdev, int enable)
	Enable or disable interrupts for 802.11 device. More...

Detailed Description

Function Documentation

net80211_netdev_open()

static int net80211_netdev_open ( struct net_device *  netdev )

static

Open 802.11 device and start association.

Parameters

netdev

Wrapping network device

Return values

rc	Return status code

This sets up a default conservative set of channels for probing, and starts the auto-association task unless the NET80211_NO_ASSOC flag is set in the wrapped 802.11 device's state field.

Definition at line 257 of file net80211.c.

{
        struct net80211_device *dev = netdev->priv;
        int rc = 0;

        if ( dev->op == &net80211_null_ops )
                return -EFAULT;

        if ( dev->op->open )
                rc = dev->op->open ( dev );

        if ( rc < 0 )
                return rc;

        if ( ! ( dev->state & NET80211_NO_ASSOC ) )
                net80211_autoassociate ( dev );

        return 0;
}

References EFAULT, net80211_autoassociate(), NET80211_NO_ASSOC, net80211_null_ops, netdev, net80211_device::op, net80211_device_operations::open, net_device::priv, rc, and net80211_device::state.

net80211_netdev_close()

static void net80211_netdev_close ( struct net_device *  netdev )

static

Close 802.11 device.

Parameters

netdev

Wrapping network device.

If the association task is running, this will stop it.

Definition at line 284 of file net80211.c.

{
        struct net80211_device *dev = netdev->priv;

        if ( dev->state & NET80211_WORKING )
                process_del ( &dev->proc_assoc );

        /* Send disassociation frame to AP, to be polite */
        if ( dev->state & NET80211_ASSOCIATED )
                net80211_send_disassoc ( dev, IEEE80211_REASON_LEAVING, 0 );

        if ( dev->handshaker && dev->handshaker->stop &&
             dev->handshaker->started )
                dev->handshaker->stop ( dev );

        free ( dev->crypto );
        free ( dev->handshaker );
        dev->crypto = NULL;
        dev->handshaker = NULL;

        netdev_link_down ( netdev );
        dev->state = 0;

        if ( dev->op->close )
                dev->op->close ( dev );
}

References net80211_device_operations::close, net80211_device::crypto, free, net80211_device::handshaker, IEEE80211_REASON_LEAVING, NET80211_ASSOCIATED, net80211_send_disassoc(), NET80211_WORKING, netdev, netdev_link_down(), NULL, net80211_device::op, net_device::priv, net80211_device::proc_assoc, process_del(), net80211_handshaker::started, net80211_device::state, and net80211_handshaker::stop.

net80211_netdev_transmit()

static int net80211_netdev_transmit ( struct net_device *  netdev, struct io_buffer *  iobuf  )

static

Transmit packet on 802.11 device.

Parameters

netdev	Wrapping network device
iobuf	I/O buffer

Return values

rc	Return status code

If encryption is enabled for the currently associated network, the packet will be encrypted prior to transmission.

Definition at line 321 of file net80211.c.

{
        struct net80211_device *dev = netdev->priv;
        struct ieee80211_frame *hdr = iobuf->data;
        int rc = -ENOSYS;

        if ( dev->crypto && ! ( hdr->fc & IEEE80211_FC_PROTECTED ) &&
             ( ( hdr->fc & IEEE80211_FC_TYPE ) == IEEE80211_TYPE_DATA ) ) {
                struct io_buffer *niob = dev->crypto->encrypt ( dev->crypto,
                                                                iobuf );
                if ( ! niob )
                        return -ENOMEM; /* only reason encryption could fail */

                /* Free the non-encrypted iob */
                netdev_tx_complete ( netdev, iobuf );

                /* Transmit the encrypted iob; the Protected flag is
                   set, so we won't recurse into here again */
                netdev_tx ( netdev, niob );

                /* Don't transmit the freed packet */
                return 0;
        }

        if ( dev->op->transmit )
                rc = dev->op->transmit ( dev, iobuf );

        return rc;
}

References net80211_device::crypto, io_buffer::data, net80211_crypto::encrypt, ENOMEM, ENOSYS, hdr, IEEE80211_FC_PROTECTED, IEEE80211_FC_TYPE, IEEE80211_TYPE_DATA, netdev, netdev_tx(), netdev_tx_complete(), net80211_device::op, net_device::priv, rc, and net80211_device_operations::transmit.

net80211_netdev_poll()

static void net80211_netdev_poll ( struct net_device *  netdev )

static

Poll 802.11 device for received packets and completed transmissions.

Parameters

netdev

Wrapping network device

Definition at line 357 of file net80211.c.

{
        struct net80211_device *dev = netdev->priv;

        if ( dev->op->poll )
                dev->op->poll ( dev );
}

References netdev, net80211_device::op, net80211_device_operations::poll, and net_device::priv.

net80211_netdev_irq()

static void net80211_netdev_irq ( struct net_device *  netdev, int  enable  )

static

Enable or disable interrupts for 802.11 device.

Parameters

netdev	Wrapping network device
enable	Whether to enable interrupts

Definition at line 371 of file net80211.c.

{
        struct net80211_device *dev = netdev->priv;

        if ( dev->op->irq )
                dev->op->irq ( dev, enable );
}

References net80211_device_operations::irq, netdev, net80211_device::op, and net_device::priv.