[net-next-2.6.git] / net / irda / irlan / irlan_eth.c

/*********************************************************************
 *
 * Filename:      irlan_eth.c
 * Version:
 * Description:
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Thu Oct 15 08:37:58 1998
 * Modified at:   Tue Mar 21 09:06:41 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * Sources:       skeleton.c by Donald Becker <becker@CESDIS.gsfc.nasa.gov>
 *                slip.c by Laurence Culhane,   <loz@holmes.demon.co.uk>
 *                          Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
 *
 *     Copyright (c) 1998-2000 Dag Brattli, All Rights Reserved.
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     Neither Dag Brattli nor University of Tromsø admit liability nor
 *     provide warranty for any of this software. This material is
 *     provided "AS-IS" and at no charge.
 *
 ********************************************************************/

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/inetdevice.h>
#include <linux/if_arp.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <net/arp.h>

#include <net/irda/irda.h>
#include <net/irda/irmod.h>
#include <net/irda/irlan_common.h>
#include <net/irda/irlan_client.h>
#include <net/irda/irlan_event.h>
#include <net/irda/irlan_eth.h>

static int  irlan_eth_open(struct net_device *dev);
static int  irlan_eth_close(struct net_device *dev);
static netdev_tx_t  irlan_eth_xmit(struct sk_buff *skb,
					 struct net_device *dev);
static void irlan_eth_set_multicast_list( struct net_device *dev);
static struct net_device_stats *irlan_eth_get_stats(struct net_device *dev);

static const struct net_device_ops irlan_eth_netdev_ops = {
	.ndo_open               = irlan_eth_open,
	.ndo_stop               = irlan_eth_close,
	.ndo_start_xmit    	= irlan_eth_xmit,
	.ndo_get_stats	        = irlan_eth_get_stats,
	.ndo_set_multicast_list = irlan_eth_set_multicast_list,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_validate_addr	= eth_validate_addr,
};

/*
 * Function irlan_eth_setup (dev)
 *
 *    The network device initialization function.
 *
 */
static void irlan_eth_setup(struct net_device *dev)
{
	ether_setup(dev);

	dev->netdev_ops		= &irlan_eth_netdev_ops;
	dev->destructor		= free_netdev;


	/*
	 * Lets do all queueing in IrTTP instead of this device driver.
	 * Queueing here as well can introduce some strange latency
	 * problems, which we will avoid by setting the queue size to 0.
	 */
	/*
	 * The bugs in IrTTP and IrLAN that created this latency issue
	 * have now been fixed, and we can propagate flow control properly
	 * to the network layer. However, this requires a minimal queue of
	 * packets for the device.
	 * Without flow control, the Tx Queue is 14 (ttp) + 0 (dev) = 14
	 * With flow control, the Tx Queue is 7 (ttp) + 4 (dev) = 11
	 * See irlan_eth_flow_indication()...
	 * Note : this number was randomly selected and would need to
	 * be adjusted.
	 * Jean II */
	dev->tx_queue_len = 4;
}

/*
 * Function alloc_irlandev
 *
 *    Allocate network device and control block
 *
 */
struct net_device *alloc_irlandev(const char *name)
{
	return alloc_netdev(sizeof(struct irlan_cb), name,
			    irlan_eth_setup);
}

/*
 * Function irlan_eth_open (dev)
 *
 *    Network device has been opened by user
 *
 */
static int irlan_eth_open(struct net_device *dev)
{
	struct irlan_cb *self = netdev_priv(dev);

	IRDA_DEBUG(2, "%s()\n", __func__ );

	/* Ready to play! */
	netif_stop_queue(dev); /* Wait until data link is ready */

	/* We are now open, so time to do some work */
	self->disconnect_reason = 0;
	irlan_client_wakeup(self, self->saddr, self->daddr);

	/* Make sure we have a hardware address before we return,
	   so DHCP clients gets happy */
	return wait_event_interruptible(self->open_wait,
					!self->tsap_data->connected);
}

/*
 * Function irlan_eth_close (dev)
 *
 *    Stop the ether network device, his function will usually be called by
 *    ifconfig down. We should now disconnect the link, We start the
 *    close timer, so that the instance will be removed if we are unable
 *    to discover the remote device after the disconnect.
 */
static int irlan_eth_close(struct net_device *dev)
{
	struct irlan_cb *self = netdev_priv(dev);

	IRDA_DEBUG(2, "%s()\n", __func__ );

	/* Stop device */
	netif_stop_queue(dev);

	irlan_close_data_channel(self);
	irlan_close_tsaps(self);

	irlan_do_client_event(self, IRLAN_LMP_DISCONNECT, NULL);
	irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);

	/* Remove frames queued on the control channel */
	skb_queue_purge(&self->client.txq);

	self->client.tx_busy = 0;

	return 0;
}

/*
 * Function irlan_eth_tx (skb)
 *
 *    Transmits ethernet frames over IrDA link.
 *
 */
static netdev_tx_t irlan_eth_xmit(struct sk_buff *skb,
					struct net_device *dev)
{
	struct irlan_cb *self = netdev_priv(dev);
	int ret;
	unsigned int len;

	/* skb headroom large enough to contain all IrDA-headers? */
	if ((skb_headroom(skb) < self->max_header_size) || (skb_shared(skb))) {
		struct sk_buff *new_skb =
			skb_realloc_headroom(skb, self->max_header_size);

		/*  We have to free the original skb anyway */
		dev_kfree_skb(skb);

		/* Did the realloc succeed? */
		if (new_skb == NULL)
			return NETDEV_TX_OK;

		/* Use the new skb instead */
		skb = new_skb;
	}

	dev->trans_start = jiffies;

	len = skb->len;
	/* Now queue the packet in the transport layer */
	if (self->use_udata)
		ret = irttp_udata_request(self->tsap_data, skb);
	else
		ret = irttp_data_request(self->tsap_data, skb);

	if (ret < 0) {
		/*
		 * IrTTPs tx queue is full, so we just have to
		 * drop the frame! You might think that we should
		 * just return -1 and don't deallocate the frame,
		 * but that is dangerous since it's possible that
		 * we have replaced the original skb with a new
		 * one with larger headroom, and that would really
		 * confuse do_dev_queue_xmit() in dev.c! I have
		 * tried :-) DB
		 */
		/* irttp_data_request already free the packet */
		self->stats.tx_dropped++;
	} else {
		self->stats.tx_packets++;
		self->stats.tx_bytes += len;
	}

	return NETDEV_TX_OK;
}

/*
 * Function irlan_eth_receive (handle, skb)
 *
 *    This function gets the data that is received on the data channel
 *
 */
int irlan_eth_receive(void *instance, void *sap, struct sk_buff *skb)
{
	struct irlan_cb *self = instance;

	if (skb == NULL) {
		++self->stats.rx_dropped;
		return 0;
	}
	if (skb->len < ETH_HLEN) {
		IRDA_DEBUG(0, "%s() : IrLAN frame too short (%d)\n",
			   __func__, skb->len);
		++self->stats.rx_dropped;
		dev_kfree_skb(skb);
		return 0;
	}

	/*
	 * Adopt this frame! Important to set all these fields since they
	 * might have been previously set by the low level IrDA network
	 * device driver
	 */
	skb->protocol = eth_type_trans(skb, self->dev); /* Remove eth header */

	self->stats.rx_packets++;
	self->stats.rx_bytes += skb->len;

	netif_rx(skb);   /* Eat it! */

	return 0;
}

/*
 * Function irlan_eth_flow (status)
 *
 *    Do flow control between IP/Ethernet and IrLAN/IrTTP. This is done by
 *    controlling the queue stop/start.
 *
 * The IrDA link layer has the advantage to have flow control, and
 * IrTTP now properly handles that. Flow controlling the higher layers
 * prevent us to drop Tx packets in here (up to 15% for a TCP socket,
 * more for UDP socket).
 * Also, this allow us to reduce the overall transmit queue, which means
 * less latency in case of mixed traffic.
 * Jean II
 */
void irlan_eth_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
{
	struct irlan_cb *self;
	struct net_device *dev;

	self = (struct irlan_cb *) instance;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

	dev = self->dev;

	IRDA_ASSERT(dev != NULL, return;);

	IRDA_DEBUG(0, "%s() : flow %s ; running %d\n", __func__,
		   flow == FLOW_STOP ? "FLOW_STOP" : "FLOW_START",
		   netif_running(dev));

	switch (flow) {
	case FLOW_STOP:
		/* IrTTP is full, stop higher layers */
		netif_stop_queue(dev);
		break;
	case FLOW_START:
	default:
		/* Tell upper layers that its time to transmit frames again */
		/* Schedule network layer */
		netif_wake_queue(dev);
		break;
	}
}

/*
 * Function set_multicast_list (dev)
 *
 *    Configure the filtering of the device
 *
 */
#define HW_MAX_ADDRS 4 /* Must query to get it! */
static void irlan_eth_set_multicast_list(struct net_device *dev)
{
	struct irlan_cb *self = netdev_priv(dev);

	IRDA_DEBUG(2, "%s()\n", __func__ );

	/* Check if data channel has been connected yet */
	if (self->client.state != IRLAN_DATA) {
		IRDA_DEBUG(1, "%s(), delaying!\n", __func__ );
		return;
	}

	if (dev->flags & IFF_PROMISC) {
		/* Enable promiscuous mode */
		IRDA_WARNING("Promiscuous mode not implemented by IrLAN!\n");
	}
	else if ((dev->flags & IFF_ALLMULTI) ||
		 netdev_mc_count(dev) > HW_MAX_ADDRS) {
		/* Disable promiscuous mode, use normal mode. */
		IRDA_DEBUG(4, "%s(), Setting multicast filter\n", __func__ );
		/* hardware_set_filter(NULL); */

		irlan_set_multicast_filter(self, TRUE);
	}
	else if (!netdev_mc_empty(dev)) {
		IRDA_DEBUG(4, "%s(), Setting multicast filter\n", __func__ );
		/* Walk the address list, and load the filter */
		/* hardware_set_filter(dev->mc_list); */

		irlan_set_multicast_filter(self, TRUE);
	}
	else {
		IRDA_DEBUG(4, "%s(), Clearing multicast filter\n", __func__ );
		irlan_set_multicast_filter(self, FALSE);
	}

	if (dev->flags & IFF_BROADCAST)
		irlan_set_broadcast_filter(self, TRUE);
	else
		irlan_set_broadcast_filter(self, FALSE);
}

/*
 * Function irlan_get_stats (dev)
 *
 *    Get the current statistics for this device
 *
 */
static struct net_device_stats *irlan_eth_get_stats(struct net_device *dev)
{
	struct irlan_cb *self = netdev_priv(dev);

	return &self->stats;
}
Commit	Line	Data
1da177e4	1	/*********************************************************************
6819bc2e	2	*
1da177e4	3	* Filename: irlan_eth.c
6819bc2e YH	4	* Version:
6819bc2e YH	5	* Description:
1da177e4 LT	6	* Status: Experimental.
	7	* Author: Dag Brattli <dagb@cs.uit.no>
	8	* Created at: Thu Oct 15 08:37:58 1998
	9	* Modified at: Tue Mar 21 09:06:41 2000
	10	* Modified by: Dag Brattli <dagb@cs.uit.no>
	11	* Sources: skeleton.c by Donald Becker <becker@CESDIS.gsfc.nasa.gov>
	12	* slip.c by Laurence Culhane, <loz@holmes.demon.co.uk>
	13	* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
6819bc2e	14	*
1da177e4	15	* Copyright (c) 1998-2000 Dag Brattli, All Rights Reserved.
6819bc2e YH	16	*
	17	* This program is free software; you can redistribute it and/or
	18	* modify it under the terms of the GNU General Public License as
	19	* published by the Free Software Foundation; either version 2 of
1da177e4	20	* the License, or (at your option) any later version.
6819bc2e	21	*
96de0e25	22	* Neither Dag Brattli nor University of Tromsø admit liability nor
6819bc2e	23	* provide warranty for any of this software. This material is
1da177e4	24	* provided "AS-IS" and at no charge.
6819bc2e	25	*
1da177e4 LT	26	********************************************************************/
1da177e4 LT	27
1da177e4 LT	28	#include <linux/netdevice.h>
	29	#include <linux/etherdevice.h>
	30	#include <linux/inetdevice.h>
	31	#include <linux/if_arp.h>
	32	#include <linux/module.h>
d43c36dc	33	#include <linux/sched.h>
1da177e4 LT	34	#include <net/arp.h>
	35
	36	#include <net/irda/irda.h>
	37	#include <net/irda/irmod.h>
	38	#include <net/irda/irlan_common.h>
	39	#include <net/irda/irlan_client.h>
	40	#include <net/irda/irlan_event.h>
	41	#include <net/irda/irlan_eth.h>
	42
	43	static int irlan_eth_open(struct net_device *dev);
	44	static int irlan_eth_close(struct net_device *dev);
6518bbb8 SH	45	static netdev_tx_t irlan_eth_xmit(struct sk_buff *skb,
6518bbb8 SH	46	struct net_device *dev);
1da177e4 LT	47	static void irlan_eth_set_multicast_list( struct net_device *dev);
	48	static struct net_device_stats irlan_eth_get_stats(struct net_device dev);
	49
9cc8ba78 SH	50	static const struct net_device_ops irlan_eth_netdev_ops = {
	51	.ndo_open = irlan_eth_open,
	52	.ndo_stop = irlan_eth_close,
	53	.ndo_start_xmit = irlan_eth_xmit,
	54	.ndo_get_stats = irlan_eth_get_stats,
	55	.ndo_set_multicast_list = irlan_eth_set_multicast_list,
	56	.ndo_change_mtu = eth_change_mtu,
	57	.ndo_validate_addr = eth_validate_addr,
	58	};
	59
1da177e4 LT	60	/*
	61	* Function irlan_eth_setup (dev)
	62	*
	63	* The network device initialization function.
	64	*
	65	*/
	66	static void irlan_eth_setup(struct net_device *dev)
	67	{
9cc8ba78 SH	68	ether_setup(dev);
	69
	70	dev->netdev_ops = &irlan_eth_netdev_ops;
1da177e4 LT	71	dev->destructor = free_netdev;
1da177e4 LT	72
6819bc2e YH	73
6819bc2e YH	74	/*
1da177e4 LT	75	* Lets do all queueing in IrTTP instead of this device driver.
	76	* Queueing here as well can introduce some strange latency
	77	* problems, which we will avoid by setting the queue size to 0.
	78	*/
	79	/*
	80	* The bugs in IrTTP and IrLAN that created this latency issue
	81	* have now been fixed, and we can propagate flow control properly
	82	* to the network layer. However, this requires a minimal queue of
	83	* packets for the device.
	84	* Without flow control, the Tx Queue is 14 (ttp) + 0 (dev) = 14
	85	* With flow control, the Tx Queue is 7 (ttp) + 4 (dev) = 11
	86	* See irlan_eth_flow_indication()...
	87	* Note : this number was randomly selected and would need to
	88	* be adjusted.
	89	* Jean II */
	90	dev->tx_queue_len = 4;
	91	}
	92
	93	/*
	94	* Function alloc_irlandev
	95	*
	96	* Allocate network device and control block
	97	*
	98	*/
	99	struct net_device alloc_irlandev(const char name)
	100	{
	101	return alloc_netdev(sizeof(struct irlan_cb), name,
	102	irlan_eth_setup);
	103	}
	104
	105	/*
	106	* Function irlan_eth_open (dev)
	107	*
	108	* Network device has been opened by user
	109	*
	110	*/
	111	static int irlan_eth_open(struct net_device *dev)
	112	{
	113	struct irlan_cb *self = netdev_priv(dev);
6819bc2e	114
0dc47877	115	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	116
1da177e4 LT	117	/* Ready to play! */
6819bc2e	118	netif_stop_queue(dev); /* Wait until data link is ready */
1da177e4 LT	119
	120	/* We are now open, so time to do some work */
	121	self->disconnect_reason = 0;
	122	irlan_client_wakeup(self, self->saddr, self->daddr);
	123
6819bc2e	124	/* Make sure we have a hardware address before we return,
1da177e4 LT	125	so DHCP clients gets happy */
	126	return wait_event_interruptible(self->open_wait,
	127	!self->tsap_data->connected);
	128	}
	129
	130	/*
	131	* Function irlan_eth_close (dev)
	132	*
	133	* Stop the ether network device, his function will usually be called by
6819bc2e	134	* ifconfig down. We should now disconnect the link, We start the
1da177e4 LT	135	* close timer, so that the instance will be removed if we are unable
	136	* to discover the remote device after the disconnect.
	137	*/
	138	static int irlan_eth_close(struct net_device *dev)
	139	{
	140	struct irlan_cb *self = netdev_priv(dev);
6819bc2e	141
0dc47877	142	IRDA_DEBUG(2, "%s()\n", __func__ );
6819bc2e	143
1da177e4 LT	144	/* Stop device */
1da177e4 LT	145	netif_stop_queue(dev);
6819bc2e	146
1da177e4 LT	147	irlan_close_data_channel(self);
	148	irlan_close_tsaps(self);
	149
	150	irlan_do_client_event(self, IRLAN_LMP_DISCONNECT, NULL);
6819bc2e YH	151	irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);
6819bc2e YH	152
1da177e4 LT	153	/* Remove frames queued on the control channel */
	154	skb_queue_purge(&self->client.txq);
	155
	156	self->client.tx_busy = 0;
6819bc2e	157
1da177e4 LT	158	return 0;
	159	}
	160
	161	/*
	162	* Function irlan_eth_tx (skb)
	163	*
	164	* Transmits ethernet frames over IrDA link.
	165	*
	166	*/
6518bbb8 SH	167	static netdev_tx_t irlan_eth_xmit(struct sk_buff *skb,
6518bbb8 SH	168	struct net_device *dev)
1da177e4 LT	169	{
	170	struct irlan_cb *self = netdev_priv(dev);
	171	int ret;
79c5f51c	172	unsigned int len;
1da177e4 LT	173
	174	/* skb headroom large enough to contain all IrDA-headers? */
	175	if ((skb_headroom(skb) < self->max_header_size) \|\| (skb_shared(skb))) {
6819bc2e	176	struct sk_buff *new_skb =
1da177e4 LT	177	skb_realloc_headroom(skb, self->max_header_size);
	178
	179	/* We have to free the original skb anyway */
	180	dev_kfree_skb(skb);
	181
	182	/* Did the realloc succeed? */
	183	if (new_skb == NULL)
6ed10654	184	return NETDEV_TX_OK;
1da177e4 LT	185
	186	/* Use the new skb instead */
	187	skb = new_skb;
6819bc2e	188	}
1da177e4 LT	189
	190	dev->trans_start = jiffies;
	191
79c5f51c	192	len = skb->len;
1da177e4 LT	193	/* Now queue the packet in the transport layer */
	194	if (self->use_udata)
	195	ret = irttp_udata_request(self->tsap_data, skb);
	196	else
	197	ret = irttp_data_request(self->tsap_data, skb);
	198
	199	if (ret < 0) {
6819bc2e	200	/*
1da177e4 LT	201	* IrTTPs tx queue is full, so we just have to
	202	* drop the frame! You might think that we should
	203	* just return -1 and don't deallocate the frame,
	204	* but that is dangerous since it's possible that
	205	* we have replaced the original skb with a new
	206	* one with larger headroom, and that would really
	207	* confuse do_dev_queue_xmit() in dev.c! I have
6819bc2e	208	* tried :-) DB
1da177e4 LT	209	*/
	210	/* irttp_data_request already free the packet */
	211	self->stats.tx_dropped++;
	212	} else {
	213	self->stats.tx_packets++;
79c5f51c	214	self->stats.tx_bytes += len;
1da177e4	215	}
6819bc2e	216
6ed10654	217	return NETDEV_TX_OK;
1da177e4 LT	218	}
	219
	220	/*
	221	* Function irlan_eth_receive (handle, skb)
	222	*
	223	* This function gets the data that is received on the data channel
	224	*
	225	*/
	226	int irlan_eth_receive(void instance, void sap, struct sk_buff *skb)
	227	{
	228	struct irlan_cb *self = instance;
	229
	230	if (skb == NULL) {
6819bc2e	231	++self->stats.rx_dropped;
1da177e4 LT	232	return 0;
	233	}
	234	if (skb->len < ETH_HLEN) {
	235	IRDA_DEBUG(0, "%s() : IrLAN frame too short (%d)\n",
0dc47877	236	__func__, skb->len);
6819bc2e	237	++self->stats.rx_dropped;
1da177e4 LT	238	dev_kfree_skb(skb);
	239	return 0;
	240	}
6819bc2e YH	241
	242	/*
	243	* Adopt this frame! Important to set all these fields since they
1da177e4	244	* might have been previously set by the low level IrDA network
6819bc2e	245	* device driver
1da177e4	246	*/
4c13eb66	247	skb->protocol = eth_type_trans(skb, self->dev); /* Remove eth header */
6819bc2e	248
1da177e4	249	self->stats.rx_packets++;
6819bc2e	250	self->stats.rx_bytes += skb->len;
1da177e4 LT	251
1da177e4 LT	252	netif_rx(skb); /* Eat it! */
6819bc2e	253
1da177e4 LT	254	return 0;
	255	}
	256
	257	/*
	258	* Function irlan_eth_flow (status)
	259	*
6819bc2e	260	* Do flow control between IP/Ethernet and IrLAN/IrTTP. This is done by
1da177e4 LT	261	* controlling the queue stop/start.
	262	*
	263	* The IrDA link layer has the advantage to have flow control, and
	264	* IrTTP now properly handles that. Flow controlling the higher layers
	265	* prevent us to drop Tx packets in here (up to 15% for a TCP socket,
	266	* more for UDP socket).
	267	* Also, this allow us to reduce the overall transmit queue, which means
	268	* less latency in case of mixed traffic.
	269	* Jean II
	270	*/
	271	void irlan_eth_flow_indication(void instance, void sap, LOCAL_FLOW flow)
	272	{
	273	struct irlan_cb *self;
	274	struct net_device *dev;
	275
	276	self = (struct irlan_cb *) instance;
	277
	278	IRDA_ASSERT(self != NULL, return;);
	279	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
6819bc2e	280
1da177e4 LT	281	dev = self->dev;
	282
	283	IRDA_ASSERT(dev != NULL, return;);
6819bc2e	284
0dc47877	285	IRDA_DEBUG(0, "%s() : flow %s ; running %d\n", __func__,
1da177e4 LT	286	flow == FLOW_STOP ? "FLOW_STOP" : "FLOW_START",
	287	netif_running(dev));
	288
	289	switch (flow) {
	290	case FLOW_STOP:
	291	/* IrTTP is full, stop higher layers */
	292	netif_stop_queue(dev);
	293	break;
	294	case FLOW_START:
	295	default:
	296	/* Tell upper layers that its time to transmit frames again */
	297	/* Schedule network layer */
	298	netif_wake_queue(dev);
	299	break;
	300	}
	301	}
	302
1da177e4 LT	303	/*
	304	* Function set_multicast_list (dev)
	305	*
	306	* Configure the filtering of the device
	307	*
	308	*/
	309	#define HW_MAX_ADDRS 4 /* Must query to get it! */
6819bc2e	310	static void irlan_eth_set_multicast_list(struct net_device *dev)
1da177e4	311	{
6819bc2e	312	struct irlan_cb *self = netdev_priv(dev);
1da177e4	313
0dc47877	314	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	315
	316	/* Check if data channel has been connected yet */
	317	if (self->client.state != IRLAN_DATA) {
0dc47877	318	IRDA_DEBUG(1, "%s(), delaying!\n", __func__ );
1da177e4 LT	319	return;
	320	}
	321
	322	if (dev->flags & IFF_PROMISC) {
	323	/* Enable promiscuous mode */
cc53ded2	324	IRDA_WARNING("Promiscuous mode not implemented by IrLAN!\n");
6819bc2e	325	}
4cd24eaf JP	326	else if ((dev->flags & IFF_ALLMULTI) \|\|
4cd24eaf JP	327	netdev_mc_count(dev) > HW_MAX_ADDRS) {
1da177e4	328	/* Disable promiscuous mode, use normal mode. */
0dc47877	329	IRDA_DEBUG(4, "%s(), Setting multicast filter\n", __func__ );
1da177e4 LT	330	/* hardware_set_filter(NULL); */
	331
	332	irlan_set_multicast_filter(self, TRUE);
	333	}
4cd24eaf	334	else if (!netdev_mc_empty(dev)) {
0dc47877	335	IRDA_DEBUG(4, "%s(), Setting multicast filter\n", __func__ );
1da177e4 LT	336	/* Walk the address list, and load the filter */
	337	/* hardware_set_filter(dev->mc_list); */
	338
	339	irlan_set_multicast_filter(self, TRUE);
	340	}
	341	else {
0dc47877	342	IRDA_DEBUG(4, "%s(), Clearing multicast filter\n", __func__ );
1da177e4 LT	343	irlan_set_multicast_filter(self, FALSE);
	344	}
	345
	346	if (dev->flags & IFF_BROADCAST)
	347	irlan_set_broadcast_filter(self, TRUE);
	348	else
	349	irlan_set_broadcast_filter(self, FALSE);
	350	}
	351
	352	/*
	353	* Function irlan_get_stats (dev)
	354	*
	355	* Get the current statistics for this device
	356	*
	357	*/
6819bc2e	358	static struct net_device_stats irlan_eth_get_stats(struct net_device dev)
1da177e4 LT	359	{
	360	struct irlan_cb *self = netdev_priv(dev);
	361
	362	return &self->stats;
	363	}