[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / bnep / netdev.c

/*
   BNEP implementation for Linux Bluetooth stack (BlueZ).
   Copyright (C) 2001-2002 Inventel Systemes
   Written 2001-2002 by
	Clément Moreau <clement.moreau@inventel.fr>
	David Libault  <david.libault@inventel.fr>

   Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

#include <linux/module.h>
#include <linux/slab.h>

#include <linux/socket.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/wait.h>

#include <asm/unaligned.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/l2cap.h>

#include "bnep.h"

#define BNEP_TX_QUEUE_LEN 20

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

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

static void bnep_net_set_mc_list(struct net_device *dev)
{
#ifdef CONFIG_BT_BNEP_MC_FILTER
	struct bnep_session *s = netdev_priv(dev);
	struct sock *sk = s->sock->sk;
	struct bnep_set_filter_req *r;
	struct sk_buff *skb;
	int size;

	BT_DBG("%s mc_count %d", dev->name, netdev_mc_count(dev));

	size = sizeof(*r) + (BNEP_MAX_MULTICAST_FILTERS + 1) * ETH_ALEN * 2;
	skb  = alloc_skb(size, GFP_ATOMIC);
	if (!skb) {
		BT_ERR("%s Multicast list allocation failed", dev->name);
		return;
	}

	r = (void *) skb->data;
	__skb_put(skb, sizeof(*r));

	r->type = BNEP_CONTROL;
	r->ctrl = BNEP_FILTER_MULTI_ADDR_SET;

	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
		u8 start[ETH_ALEN] = { 0x01 };

		/* Request all addresses */
		memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN);
		memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
		r->len = htons(ETH_ALEN * 2);
	} else {
		struct dev_mc_list *dmi = dev->mc_list;
		int i, len = skb->len;

		if (dev->flags & IFF_BROADCAST) {
			memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
			memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
		}

		/* FIXME: We should group addresses here. */

		for (i = 0;
		     i < netdev_mc_count(dev) && i < BNEP_MAX_MULTICAST_FILTERS;
		     i++) {
			memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN);
			memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN);
			dmi = dmi->next;
		}
		r->len = htons(skb->len - len);
	}

	skb_queue_tail(&sk->sk_write_queue, skb);
	wake_up_interruptible(sk->sk_sleep);
#endif
}

static int bnep_net_set_mac_addr(struct net_device *dev, void *arg)
{
	BT_DBG("%s", dev->name);
	return 0;
}

static void bnep_net_timeout(struct net_device *dev)
{
	BT_DBG("net_timeout");
	netif_wake_queue(dev);
}

#ifdef CONFIG_BT_BNEP_MC_FILTER
static inline int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s)
{
	struct ethhdr *eh = (void *) skb->data;

	if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter))
		return 1;
	return 0;
}
#endif

#ifdef CONFIG_BT_BNEP_PROTO_FILTER
/* Determine ether protocol. Based on eth_type_trans. */
static inline u16 bnep_net_eth_proto(struct sk_buff *skb)
{
	struct ethhdr *eh = (void *) skb->data;
	u16 proto = ntohs(eh->h_proto);

	if (proto >= 1536)
		return proto;

	if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
		return ETH_P_802_3;

	return ETH_P_802_2;
}

static inline int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s)
{
	u16 proto = bnep_net_eth_proto(skb);
	struct bnep_proto_filter *f = s->proto_filter;
	int i;

	for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) {
		if (proto >= f[i].start && proto <= f[i].end)
			return 0;
	}

	BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto);
	return 1;
}
#endif

static netdev_tx_t bnep_net_xmit(struct sk_buff *skb,
				 struct net_device *dev)
{
	struct bnep_session *s = netdev_priv(dev);
	struct sock *sk = s->sock->sk;

	BT_DBG("skb %p, dev %p", skb, dev);

#ifdef CONFIG_BT_BNEP_MC_FILTER
	if (bnep_net_mc_filter(skb, s)) {
		kfree_skb(skb);
		return NETDEV_TX_OK;
	}
#endif

#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	if (bnep_net_proto_filter(skb, s)) {
		kfree_skb(skb);
		return NETDEV_TX_OK;
	}
#endif

	/*
	 * We cannot send L2CAP packets from here as we are potentially in a bh.
	 * So we have to queue them and wake up session thread which is sleeping
	 * on the sk->sk_sleep.
	 */
	dev->trans_start = jiffies;
	skb_queue_tail(&sk->sk_write_queue, skb);
	wake_up_interruptible(sk->sk_sleep);

	if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) {
		BT_DBG("tx queue is full");

		/* Stop queuing.
		 * Session thread will do netif_wake_queue() */
		netif_stop_queue(dev);
	}

	return NETDEV_TX_OK;
}

static const struct net_device_ops bnep_netdev_ops = {
	.ndo_open            = bnep_net_open,
	.ndo_stop            = bnep_net_close,
	.ndo_start_xmit	     = bnep_net_xmit,
	.ndo_validate_addr   = eth_validate_addr,
	.ndo_set_multicast_list = bnep_net_set_mc_list,
	.ndo_set_mac_address = bnep_net_set_mac_addr,
	.ndo_tx_timeout      = bnep_net_timeout,
	.ndo_change_mtu	     = eth_change_mtu,

};

void bnep_net_setup(struct net_device *dev)
{

	memset(dev->broadcast, 0xff, ETH_ALEN);
	dev->addr_len = ETH_ALEN;

	ether_setup(dev);
	dev->netdev_ops = &bnep_netdev_ops;

	dev->watchdog_timeo  = HZ * 2;
}
Commit	Line	Data
8e87d142	1	/*
1da177e4 LT	2	BNEP implementation for Linux Bluetooth stack (BlueZ).
	3	Copyright (C) 2001-2002 Inventel Systemes
	4	Written 2001-2002 by
96de0e25	5	Clément Moreau <clement.moreau@inventel.fr>
1da177e4 LT	6	David Libault <david.libault@inventel.fr>
	7
	8	Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
	9
	10	This program is free software; you can redistribute it and/or modify
	11	it under the terms of the GNU General Public License version 2 as
	12	published by the Free Software Foundation;
	13
	14	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	15	OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
	17	IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142 YH	18	CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
	19	WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	20	ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4 LT	21	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1da177e4 LT	22
8e87d142 YH	23	ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
8e87d142 YH	24	COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4 LT	25	SOFTWARE IS DISCLAIMED.
	26	*/
	27
1da177e4	28	#include <linux/module.h>
5a0e3ad6	29	#include <linux/slab.h>
1da177e4 LT	30
	31	#include <linux/socket.h>
	32	#include <linux/netdevice.h>
	33	#include <linux/etherdevice.h>
	34	#include <linux/skbuff.h>
	35	#include <linux/wait.h>
	36
	37	#include <asm/unaligned.h>
	38
	39	#include <net/bluetooth/bluetooth.h>
	40	#include <net/bluetooth/hci_core.h>
	41	#include <net/bluetooth/l2cap.h>
	42
	43	#include "bnep.h"
	44
1da177e4 LT	45	#define BNEP_TX_QUEUE_LEN 20
	46
	47	static int bnep_net_open(struct net_device *dev)
	48	{
	49	netif_start_queue(dev);
	50	return 0;
	51	}
	52
	53	static int bnep_net_close(struct net_device *dev)
	54	{
	55	netif_stop_queue(dev);
	56	return 0;
	57	}
	58
1da177e4 LT	59	static void bnep_net_set_mc_list(struct net_device *dev)
	60	{
	61	#ifdef CONFIG_BT_BNEP_MC_FILTER
524ad0a7	62	struct bnep_session *s = netdev_priv(dev);
1da177e4 LT	63	struct sock *sk = s->sock->sk;
	64	struct bnep_set_filter_req *r;
	65	struct sk_buff *skb;
	66	int size;
	67
4cd24eaf	68	BT_DBG("%s mc_count %d", dev->name, netdev_mc_count(dev));
1da177e4 LT	69
	70	size = sizeof(r) + (BNEP_MAX_MULTICAST_FILTERS + 1) ETH_ALEN * 2;
	71	skb = alloc_skb(size, GFP_ATOMIC);
	72	if (!skb) {
	73	BT_ERR("%s Multicast list allocation failed", dev->name);
	74	return;
	75	}
	76
	77	r = (void *) skb->data;
	78	__skb_put(skb, sizeof(*r));
	79
	80	r->type = BNEP_CONTROL;
	81	r->ctrl = BNEP_FILTER_MULTI_ADDR_SET;
	82
8e87d142	83	if (dev->flags & (IFF_PROMISC \| IFF_ALLMULTI)) {
1da177e4 LT	84	u8 start[ETH_ALEN] = { 0x01 };
	85
	86	/* Request all addresses */
	87	memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN);
	88	memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
	89	r->len = htons(ETH_ALEN * 2);
	90	} else {
8e87d142	91	struct dev_mc_list *dmi = dev->mc_list;
1da177e4 LT	92	int i, len = skb->len;
	93
	94	if (dev->flags & IFF_BROADCAST) {
	95	memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
	96	memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
8e87d142 YH	97	}
8e87d142 YH	98
1da177e4 LT	99	/* FIXME: We should group addresses here. */
1da177e4 LT	100
4cd24eaf JP	101	for (i = 0;
	102	i < netdev_mc_count(dev) && i < BNEP_MAX_MULTICAST_FILTERS;
	103	i++) {
1da177e4 LT	104	memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN);
	105	memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN);
	106	dmi = dmi->next;
	107	}
	108	r->len = htons(skb->len - len);
	109	}
	110
	111	skb_queue_tail(&sk->sk_write_queue, skb);
	112	wake_up_interruptible(sk->sk_sleep);
	113	#endif
	114	}
	115
	116	static int bnep_net_set_mac_addr(struct net_device dev, void arg)
	117	{
	118	BT_DBG("%s", dev->name);
	119	return 0;
	120	}
	121
	122	static void bnep_net_timeout(struct net_device *dev)
	123	{
	124	BT_DBG("net_timeout");
	125	netif_wake_queue(dev);
	126	}
	127
1da177e4 LT	128	#ifdef CONFIG_BT_BNEP_MC_FILTER
	129	static inline int bnep_net_mc_filter(struct sk_buff skb, struct bnep_session s)
	130	{
	131	struct ethhdr eh = (void ) skb->data;
	132
	133	if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter))
	134	return 1;
	135	return 0;
	136	}
	137	#endif
	138
	139	#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	140	/* Determine ether protocol. Based on eth_type_trans. */
	141	static inline u16 bnep_net_eth_proto(struct sk_buff *skb)
	142	{
	143	struct ethhdr eh = (void ) skb->data;
e41d2169	144	u16 proto = ntohs(eh->h_proto);
8e87d142	145
e41d2169 AV	146	if (proto >= 1536)
e41d2169 AV	147	return proto;
8e87d142	148
e41d2169 AV	149	if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
e41d2169 AV	150	return ETH_P_802_3;
8e87d142	151
e41d2169	152	return ETH_P_802_2;
1da177e4 LT	153	}
	154
	155	static inline int bnep_net_proto_filter(struct sk_buff skb, struct bnep_session s)
	156	{
	157	u16 proto = bnep_net_eth_proto(skb);
	158	struct bnep_proto_filter *f = s->proto_filter;
	159	int i;
8e87d142	160
1da177e4 LT	161	for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) {
	162	if (proto >= f[i].start && proto <= f[i].end)
	163	return 0;
	164	}
	165
	166	BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto);
	167	return 1;
	168	}
	169	#endif
	170
6fef4c0c SH	171	static netdev_tx_t bnep_net_xmit(struct sk_buff *skb,
6fef4c0c SH	172	struct net_device *dev)
1da177e4	173	{
524ad0a7	174	struct bnep_session *s = netdev_priv(dev);
1da177e4 LT	175	struct sock *sk = s->sock->sk;
	176
	177	BT_DBG("skb %p, dev %p", skb, dev);
	178
	179	#ifdef CONFIG_BT_BNEP_MC_FILTER
	180	if (bnep_net_mc_filter(skb, s)) {
	181	kfree_skb(skb);
6ed10654	182	return NETDEV_TX_OK;
1da177e4 LT	183	}
1da177e4 LT	184	#endif
8e87d142	185
1da177e4 LT	186	#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	187	if (bnep_net_proto_filter(skb, s)) {
	188	kfree_skb(skb);
6ed10654	189	return NETDEV_TX_OK;
1da177e4 LT	190	}
1da177e4 LT	191	#endif
8e87d142	192
1da177e4 LT	193	/*
	194	* We cannot send L2CAP packets from here as we are potentially in a bh.
	195	* So we have to queue them and wake up session thread which is sleeping
	196	* on the sk->sk_sleep.
	197	*/
	198	dev->trans_start = jiffies;
	199	skb_queue_tail(&sk->sk_write_queue, skb);
	200	wake_up_interruptible(sk->sk_sleep);
	201
	202	if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) {
	203	BT_DBG("tx queue is full");
	204
	205	/* Stop queuing.
	206	* Session thread will do netif_wake_queue() */
	207	netif_stop_queue(dev);
	208	}
	209
6ed10654	210	return NETDEV_TX_OK;
1da177e4 LT	211	}
1da177e4 LT	212
b4d7f0a4 SH	213	static const struct net_device_ops bnep_netdev_ops = {
	214	.ndo_open = bnep_net_open,
	215	.ndo_stop = bnep_net_close,
	216	.ndo_start_xmit = bnep_net_xmit,
	217	.ndo_validate_addr = eth_validate_addr,
	218	.ndo_set_multicast_list = bnep_net_set_mc_list,
	219	.ndo_set_mac_address = bnep_net_set_mac_addr,
	220	.ndo_tx_timeout = bnep_net_timeout,
	221	.ndo_change_mtu = eth_change_mtu,
	222
	223	};
	224
1da177e4 LT	225	void bnep_net_setup(struct net_device *dev)
	226	{
	227
	228	memset(dev->broadcast, 0xff, ETH_ALEN);
	229	dev->addr_len = ETH_ALEN;
	230
	231	ether_setup(dev);
b4d7f0a4	232	dev->netdev_ops = &bnep_netdev_ops;
1da177e4 LT	233
1da177e4 LT	234	dev->watchdog_timeo = HZ * 2;
1da177e4	235	}