[mirror_ubuntu-bionic-kernel.git] / drivers / staging / batman-adv / soft-interface.c

/*
 * Copyright (C) 2007-2009 B.A.T.M.A.N. contributors:
 *
 * Marek Lindner, Simon Wunderlich
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */

#include "main.h"
#include "soft-interface.h"
#include "hard-interface.h"
#include "send.h"
#include "translation-table.h"
#include "types.h"
#include "hash.h"
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>

static uint16_t bcast_seqno = 1; /* give own bcast messages seq numbers to avoid
				  * broadcast storms */
static int32_t skb_packets;
static int32_t skb_bad_packets;

unsigned char mainIfAddr[ETH_ALEN];
static unsigned char mainIfAddr_default[ETH_ALEN];
static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
static void bat_get_drvinfo(struct net_device *dev,
			    struct ethtool_drvinfo *info);
static u32 bat_get_msglevel(struct net_device *dev);
static void bat_set_msglevel(struct net_device *dev, u32 value);
static u32 bat_get_link(struct net_device *dev);
static u32 bat_get_rx_csum(struct net_device *dev);
static int bat_set_rx_csum(struct net_device *dev, u32 data);

static const struct ethtool_ops bat_ethtool_ops = {
	.get_settings = bat_get_settings,
	.get_drvinfo = bat_get_drvinfo,
	.get_msglevel = bat_get_msglevel,
	.set_msglevel = bat_set_msglevel,
	.get_link = bat_get_link,
	.get_rx_csum = bat_get_rx_csum,
	.set_rx_csum = bat_set_rx_csum
};

void set_main_if_addr(uint8_t *addr)
{
	memcpy(mainIfAddr, addr, ETH_ALEN);
}

int main_if_was_up(void)
{
	return (memcmp(mainIfAddr, mainIfAddr_default, ETH_ALEN) != 0 ? 1 : 0);
}

int my_skb_push(struct sk_buff *skb, unsigned int len)
{
	int result = 0;

	skb_packets++;
	if (skb_headroom(skb) < len) {
		skb_bad_packets++;
		result = pskb_expand_head(skb, len, 0, GFP_ATOMIC);

		if (result < 0)
			return result;
	}

	skb_push(skb, len);
	return 0;
}

#ifdef HAVE_NET_DEVICE_OPS
static const struct net_device_ops bat_netdev_ops = {
	.ndo_open = interface_open,
	.ndo_stop = interface_release,
	.ndo_get_stats = interface_stats,
	.ndo_set_mac_address = interface_set_mac_addr,
	.ndo_change_mtu = interface_change_mtu,
	.ndo_start_xmit = interface_tx,
	.ndo_validate_addr = eth_validate_addr
};
#endif

void interface_setup(struct net_device *dev)
{
	struct bat_priv *priv = netdev_priv(dev);
	char dev_addr[ETH_ALEN];

	ether_setup(dev);

#ifdef HAVE_NET_DEVICE_OPS
	dev->netdev_ops = &bat_netdev_ops;
#else
	dev->open = interface_open;
	dev->stop = interface_release;
	dev->get_stats = interface_stats;
	dev->set_mac_address = interface_set_mac_addr;
	dev->change_mtu = interface_change_mtu;
	dev->hard_start_xmit = interface_tx;
#endif
	dev->destructor = free_netdev;

	dev->mtu = hardif_min_mtu();
	dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
						* skbuff for our header */

	/* generate random address */
	random_ether_addr(dev_addr);
	memcpy(dev->dev_addr, dev_addr, ETH_ALEN);

	SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);

	memset(priv, 0, sizeof(struct bat_priv));
}

int interface_open(struct net_device *dev)
{
	netif_start_queue(dev);
	return 0;
}

int interface_release(struct net_device *dev)
{
	netif_stop_queue(dev);
	return 0;
}

struct net_device_stats *interface_stats(struct net_device *dev)
{
	struct bat_priv *priv = netdev_priv(dev);
	return &priv->stats;
}

int interface_set_mac_addr(struct net_device *dev, void *p)
{
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	hna_local_remove(dev->dev_addr, "mac address changed");
	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
	hna_local_add(dev->dev_addr);

	return 0;
}

int interface_change_mtu(struct net_device *dev, int new_mtu)
{
	/* check ranges */
	if ((new_mtu < 68) || (new_mtu > hardif_min_mtu()))
		return -EINVAL;

	dev->mtu = new_mtu;

	return 0;
}

int interface_tx(struct sk_buff *skb, struct net_device *dev)
{
	struct unicast_packet *unicast_packet;
	struct bcast_packet *bcast_packet;
	struct orig_node *orig_node;
	struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
	struct bat_priv *priv = netdev_priv(dev);
	struct batman_if *batman_if;
	uint8_t dstaddr[6];
	int data_len = skb->len;
	unsigned long flags;

	if (atomic_read(&module_state) != MODULE_ACTIVE)
		goto dropped;

	dev->trans_start = jiffies;
	/* TODO: check this for locks */
	hna_local_add(ethhdr->h_source);

	/* ethernet packet should be broadcasted */
	if (is_bcast(ethhdr->h_dest) || is_mcast(ethhdr->h_dest)) {

		if (my_skb_push(skb, sizeof(struct bcast_packet)) < 0)
			goto dropped;

		bcast_packet = (struct bcast_packet *)skb->data;
		bcast_packet->version = COMPAT_VERSION;

		/* batman packet type: broadcast */
		bcast_packet->packet_type = BAT_BCAST;

		/* hw address of first interface is the orig mac because only
		 * this mac is known throughout the mesh */
		memcpy(bcast_packet->orig, mainIfAddr, ETH_ALEN);

		/* set broadcast sequence number */
		bcast_packet->seqno = htons(bcast_seqno);

		bcast_seqno++;

		/* broadcast packet */
		add_bcast_packet_to_list(skb);
		/* a copy is stored in the bcast list, therefore removing
		 * the original skb. */
		kfree_skb(skb);

	/* unicast packet */
	} else {
		spin_lock_irqsave(&orig_hash_lock, flags);
		/* get routing information */
		orig_node = ((struct orig_node *)hash_find(orig_hash,
							   ethhdr->h_dest));

		/* check for hna host */
		if (!orig_node)
			orig_node = transtable_search(ethhdr->h_dest);

		if ((orig_node) &&
		    (orig_node->batman_if) &&
		    (orig_node->router)) {
			if (my_skb_push(skb, sizeof(struct unicast_packet)) < 0)
				goto unlock;

			unicast_packet = (struct unicast_packet *)skb->data;

			unicast_packet->version = COMPAT_VERSION;
			/* batman packet type: unicast */
			unicast_packet->packet_type = BAT_UNICAST;
			/* set unicast ttl */
			unicast_packet->ttl = TTL;
			/* copy the destination for faster routing */
			memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);

			/* net_dev won't be available when not active */
			if (orig_node->batman_if->if_active != IF_ACTIVE)
				goto unlock;

			/* don't lock while sending the packets ... we therefore
			 * copy the required data before sending */

			batman_if = orig_node->batman_if;
			memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
			spin_unlock_irqrestore(&orig_hash_lock, flags);

			send_skb_packet(skb, batman_if, dstaddr);
		} else {
			goto unlock;
		}
	}

	priv->stats.tx_packets++;
	priv->stats.tx_bytes += data_len;
	goto end;

unlock:
	spin_unlock_irqrestore(&orig_hash_lock, flags);
dropped:
	priv->stats.tx_dropped++;
end:
	return NETDEV_TX_OK;
}

void interface_rx(struct sk_buff *skb, int hdr_size)
{
	struct net_device *dev = soft_device;
	struct bat_priv *priv = netdev_priv(dev);

	/* check if enough space is available for pulling, and pull */
	if (!pskb_may_pull(skb, hdr_size)) {
		kfree_skb(skb);
		return;
	}
	skb_pull_rcsum(skb, hdr_size);
/*	skb_set_mac_header(skb, -sizeof(struct ethhdr));*/

	skb->dev = dev;
	skb->protocol = eth_type_trans(skb, dev);

	/* should not be neccesary anymore as we use skb_pull_rcsum()
	 * TODO: please verify this and remove this TODO
	 * -- Dec 21st 2009, Simon Wunderlich */

/*	skb->ip_summed = CHECKSUM_UNNECESSARY;*/

	/* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST,
	 * PACKET_OTHERHOST or PACKET_HOST */

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

	dev->last_rx = jiffies;

	netif_rx(skb);
}

/* ethtool */
static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	cmd->supported = 0;
	cmd->advertising = 0;
	cmd->speed = SPEED_10;
	cmd->duplex = DUPLEX_FULL;
	cmd->port = PORT_TP;
	cmd->phy_address = 0;
	cmd->transceiver = XCVR_INTERNAL;
	cmd->autoneg = AUTONEG_DISABLE;
	cmd->maxtxpkt = 0;
	cmd->maxrxpkt = 0;

	return 0;
}

static void bat_get_drvinfo(struct net_device *dev,
			    struct ethtool_drvinfo *info)
{
	strcpy(info->driver, "B.A.T.M.A.N. advanced");
	strcpy(info->version, SOURCE_VERSION);
	strcpy(info->fw_version, "N/A");
	strcpy(info->bus_info, "batman");
}

static u32 bat_get_msglevel(struct net_device *dev)
{
	return -EOPNOTSUPP;
}

static void bat_set_msglevel(struct net_device *dev, u32 value)
{
}

static u32 bat_get_link(struct net_device *dev)
{
	return 1;
}

static u32 bat_get_rx_csum(struct net_device *dev)
{
	return 0;
}

static int bat_set_rx_csum(struct net_device *dev, u32 data)
{
	return -EOPNOTSUPP;
}
Commit	Line	Data
5beef3c9 AL	1	/*
	2	* Copyright (C) 2007-2009 B.A.T.M.A.N. contributors:
	3	*
	4	* Marek Lindner, Simon Wunderlich
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of version 2 of the GNU General Public
	8	* License as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	18	* 02110-1301, USA
	19	*
	20	*/
	21
	22	#include "main.h"
	23	#include "soft-interface.h"
	24	#include "hard-interface.h"
	25	#include "send.h"
	26	#include "translation-table.h"
5beef3c9 AL	27	#include "types.h"
5beef3c9 AL	28	#include "hash.h"
5a0e3ad6	29	#include <linux/slab.h>
5beef3c9 AL	30	#include <linux/ethtool.h>
5beef3c9 AL	31	#include <linux/etherdevice.h>
5beef3c9 AL	32
	33	static uint16_t bcast_seqno = 1; /* give own bcast messages seq numbers to avoid
	34	* broadcast storms */
	35	static int32_t skb_packets;
	36	static int32_t skb_bad_packets;
5beef3c9 AL	37
	38	unsigned char mainIfAddr[ETH_ALEN];
	39	static unsigned char mainIfAddr_default[ETH_ALEN];
	40	static int bat_get_settings(struct net_device dev, struct ethtool_cmd cmd);
	41	static void bat_get_drvinfo(struct net_device *dev,
	42	struct ethtool_drvinfo *info);
	43	static u32 bat_get_msglevel(struct net_device *dev);
	44	static void bat_set_msglevel(struct net_device *dev, u32 value);
	45	static u32 bat_get_link(struct net_device *dev);
	46	static u32 bat_get_rx_csum(struct net_device *dev);
	47	static int bat_set_rx_csum(struct net_device *dev, u32 data);
	48
	49	static const struct ethtool_ops bat_ethtool_ops = {
	50	.get_settings = bat_get_settings,
	51	.get_drvinfo = bat_get_drvinfo,
	52	.get_msglevel = bat_get_msglevel,
	53	.set_msglevel = bat_set_msglevel,
	54	.get_link = bat_get_link,
	55	.get_rx_csum = bat_get_rx_csum,
	56	.set_rx_csum = bat_set_rx_csum
	57	};
	58
	59	void set_main_if_addr(uint8_t *addr)
	60	{
	61	memcpy(mainIfAddr, addr, ETH_ALEN);
	62	}
	63
	64	int main_if_was_up(void)
	65	{
	66	return (memcmp(mainIfAddr, mainIfAddr_default, ETH_ALEN) != 0 ? 1 : 0);
	67	}
	68
e7017195	69	int my_skb_push(struct sk_buff *skb, unsigned int len)
5beef3c9 AL	70	{
	71	int result = 0;
	72
	73	skb_packets++;
e7017195	74	if (skb_headroom(skb) < len) {
5beef3c9 AL	75	skb_bad_packets++;
	76	result = pskb_expand_head(skb, len, 0, GFP_ATOMIC);
	77
	78	if (result < 0)
	79	return result;
	80	}
	81
	82	skb_push(skb, len);
	83	return 0;
	84	}
	85
	86	#ifdef HAVE_NET_DEVICE_OPS
	87	static const struct net_device_ops bat_netdev_ops = {
	88	.ndo_open = interface_open,
	89	.ndo_stop = interface_release,
	90	.ndo_get_stats = interface_stats,
	91	.ndo_set_mac_address = interface_set_mac_addr,
	92	.ndo_change_mtu = interface_change_mtu,
	93	.ndo_start_xmit = interface_tx,
	94	.ndo_validate_addr = eth_validate_addr
	95	};
	96	#endif
	97
	98	void interface_setup(struct net_device *dev)
	99	{
	100	struct bat_priv *priv = netdev_priv(dev);
	101	char dev_addr[ETH_ALEN];
	102
	103	ether_setup(dev);
	104
	105	#ifdef HAVE_NET_DEVICE_OPS
	106	dev->netdev_ops = &bat_netdev_ops;
	107	#else
	108	dev->open = interface_open;
	109	dev->stop = interface_release;
	110	dev->get_stats = interface_stats;
	111	dev->set_mac_address = interface_set_mac_addr;
	112	dev->change_mtu = interface_change_mtu;
	113	dev->hard_start_xmit = interface_tx;
	114	#endif
	115	dev->destructor = free_netdev;
	116
	117	dev->mtu = hardif_min_mtu();
	118	dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
	119	* skbuff for our header */
	120
	121	/* generate random address */
	122	random_ether_addr(dev_addr);
abad5446	123	memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
5beef3c9 AL	124
	125	SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
	126
	127	memset(priv, 0, sizeof(struct bat_priv));
	128	}
	129
	130	int interface_open(struct net_device *dev)
	131	{
	132	netif_start_queue(dev);
	133	return 0;
	134	}
	135
	136	int interface_release(struct net_device *dev)
	137	{
	138	netif_stop_queue(dev);
	139	return 0;
	140	}
	141
	142	struct net_device_stats interface_stats(struct net_device dev)
	143	{
	144	struct bat_priv *priv = netdev_priv(dev);
	145	return &priv->stats;
	146	}
	147
a9c2910a	148	int interface_set_mac_addr(struct net_device dev, void p)
5beef3c9	149	{
a9c2910a AL	150	struct sockaddr *addr = p;
	151
	152	if (!is_valid_ether_addr(addr->sa_data))
	153	return -EADDRNOTAVAIL;
	154
	155	hna_local_remove(dev->dev_addr, "mac address changed");
	156	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
	157	hna_local_add(dev->dev_addr);
	158
	159	return 0;
5beef3c9 AL	160	}
	161
	162	int interface_change_mtu(struct net_device *dev, int new_mtu)
	163	{
	164	/* check ranges */
	165	if ((new_mtu < 68) \|\| (new_mtu > hardif_min_mtu()))
	166	return -EINVAL;
	167
	168	dev->mtu = new_mtu;
	169
	170	return 0;
	171	}
	172
	173	int interface_tx(struct sk_buff skb, struct net_device dev)
	174	{
	175	struct unicast_packet *unicast_packet;
	176	struct bcast_packet *bcast_packet;
	177	struct orig_node *orig_node;
	178	struct ethhdr ethhdr = (struct ethhdr )skb->data;
	179	struct bat_priv *priv = netdev_priv(dev);
e7017195 SW	180	struct batman_if *batman_if;
e7017195 SW	181	uint8_t dstaddr[6];
5beef3c9	182	int data_len = skb->len;
e7017195	183	unsigned long flags;
5beef3c9 AL	184
	185	if (atomic_read(&module_state) != MODULE_ACTIVE)
	186	goto dropped;
	187
	188	dev->trans_start = jiffies;
	189	/* TODO: check this for locks */
	190	hna_local_add(ethhdr->h_source);
	191
	192	/* ethernet packet should be broadcasted */
	193	if (is_bcast(ethhdr->h_dest) \|\| is_mcast(ethhdr->h_dest)) {
	194
	195	if (my_skb_push(skb, sizeof(struct bcast_packet)) < 0)
	196	goto dropped;
	197
	198	bcast_packet = (struct bcast_packet *)skb->data;
5beef3c9 AL	199	bcast_packet->version = COMPAT_VERSION;
	200
	201	/* batman packet type: broadcast */
	202	bcast_packet->packet_type = BAT_BCAST;
	203
	204	/* hw address of first interface is the orig mac because only
	205	* this mac is known throughout the mesh */
	206	memcpy(bcast_packet->orig, mainIfAddr, ETH_ALEN);
e7017195	207
5beef3c9 AL	208	/* set broadcast sequence number */
	209	bcast_packet->seqno = htons(bcast_seqno);
	210
	211	bcast_seqno++;
	212
	213	/* broadcast packet */
e7017195 SW	214	add_bcast_packet_to_list(skb);
	215	/* a copy is stored in the bcast list, therefore removing
	216	* the original skb. */
	217	kfree_skb(skb);
5beef3c9 AL	218
	219	/* unicast packet */
	220	} else {
e7017195	221	spin_lock_irqsave(&orig_hash_lock, flags);
5beef3c9 AL	222	/* get routing information */
	223	orig_node = ((struct orig_node *)hash_find(orig_hash,
	224	ethhdr->h_dest));
	225
	226	/* check for hna host */
	227	if (!orig_node)
	228	orig_node = transtable_search(ethhdr->h_dest);
	229
	230	if ((orig_node) &&
	231	(orig_node->batman_if) &&
	232	(orig_node->router)) {
	233	if (my_skb_push(skb, sizeof(struct unicast_packet)) < 0)
	234	goto unlock;
	235
	236	unicast_packet = (struct unicast_packet *)skb->data;
	237
	238	unicast_packet->version = COMPAT_VERSION;
	239	/* batman packet type: unicast */
	240	unicast_packet->packet_type = BAT_UNICAST;
	241	/* set unicast ttl */
	242	unicast_packet->ttl = TTL;
	243	/* copy the destination for faster routing */
	244	memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
	245
	246	/* net_dev won't be available when not active */
	247	if (orig_node->batman_if->if_active != IF_ACTIVE)
	248	goto unlock;
	249
e7017195 SW	250	/* don't lock while sending the packets ... we therefore
	251	* copy the required data before sending */
	252
	253	batman_if = orig_node->batman_if;
	254	memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
	255	spin_unlock_irqrestore(&orig_hash_lock, flags);
	256
	257	send_skb_packet(skb, batman_if, dstaddr);
5beef3c9 AL	258	} else {
	259	goto unlock;
	260	}
5beef3c9 AL	261	}
	262
	263	priv->stats.tx_packets++;
	264	priv->stats.tx_bytes += data_len;
	265	goto end;
	266
	267	unlock:
e7017195	268	spin_unlock_irqrestore(&orig_hash_lock, flags);
5beef3c9 AL	269	dropped:
	270	priv->stats.tx_dropped++;
	271	end:
abad5446	272	return NETDEV_TX_OK;
5beef3c9 AL	273	}
5beef3c9 AL	274
e7017195	275	void interface_rx(struct sk_buff *skb, int hdr_size)
5beef3c9	276	{
e7017195	277	struct net_device *dev = soft_device;
5beef3c9 AL	278	struct bat_priv *priv = netdev_priv(dev);
5beef3c9 AL	279
e7017195 SW	280	/* check if enough space is available for pulling, and pull */
	281	if (!pskb_may_pull(skb, hdr_size)) {
	282	kfree_skb(skb);
	283	return;
5beef3c9	284	}
e7017195 SW	285	skb_pull_rcsum(skb, hdr_size);
e7017195 SW	286	/* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/
5beef3c9	287
5beef3c9 AL	288	skb->dev = dev;
5beef3c9 AL	289	skb->protocol = eth_type_trans(skb, dev);
e7017195 SW	290
	291	/* should not be neccesary anymore as we use skb_pull_rcsum()
	292	* TODO: please verify this and remove this TODO
	293	* -- Dec 21st 2009, Simon Wunderlich */
	294
	295	/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
	296
	297	/* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST,
	298	* PACKET_OTHERHOST or PACKET_HOST */
5beef3c9 AL	299
5beef3c9 AL	300	priv->stats.rx_packets++;
e7017195	301	priv->stats.rx_bytes += skb->len;
5beef3c9 AL	302
	303	dev->last_rx = jiffies;
	304
	305	netif_rx(skb);
5beef3c9 AL	306	}
	307
	308	/* ethtool */
	309	static int bat_get_settings(struct net_device dev, struct ethtool_cmd cmd)
	310	{
	311	cmd->supported = 0;
	312	cmd->advertising = 0;
	313	cmd->speed = SPEED_10;
	314	cmd->duplex = DUPLEX_FULL;
	315	cmd->port = PORT_TP;
	316	cmd->phy_address = 0;
	317	cmd->transceiver = XCVR_INTERNAL;
	318	cmd->autoneg = AUTONEG_DISABLE;
	319	cmd->maxtxpkt = 0;
	320	cmd->maxrxpkt = 0;
	321
	322	return 0;
	323	}
	324
	325	static void bat_get_drvinfo(struct net_device *dev,
	326	struct ethtool_drvinfo *info)
	327	{
	328	strcpy(info->driver, "B.A.T.M.A.N. advanced");
	329	strcpy(info->version, SOURCE_VERSION);
	330	strcpy(info->fw_version, "N/A");
	331	strcpy(info->bus_info, "batman");
	332	}
	333
	334	static u32 bat_get_msglevel(struct net_device *dev)
	335	{
	336	return -EOPNOTSUPP;
	337	}
	338
	339	static void bat_set_msglevel(struct net_device *dev, u32 value)
	340	{
5beef3c9 AL	341	}
	342
	343	static u32 bat_get_link(struct net_device *dev)
	344	{
	345	return 1;
	346	}
	347
	348	static u32 bat_get_rx_csum(struct net_device *dev)
	349	{
	350	return 0;
	351	}
	352
	353	static int bat_set_rx_csum(struct net_device *dev, u32 data)
	354	{
	355	return -EOPNOTSUPP;
	356	}