[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/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 struct net_device_stats *bnep_net_get_stats(struct net_device *dev)
{
	struct bnep_session *s = netdev_priv(dev);
	return &s->stats;
}

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, dev->mc_count);

	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 < dev->mc_count && 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);
}

static int bnep_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	return -EINVAL;
}

#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 int 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 0;
	}
#endif

#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	if (bnep_net_proto_filter(skb, s)) {
		kfree_skb(skb);
		return 0;
	}
#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 0;
}

void bnep_net_setup(struct net_device *dev)
{

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

	ether_setup(dev);

	dev->open            = bnep_net_open;
	dev->stop            = bnep_net_close;
	dev->hard_start_xmit = bnep_net_xmit;
	dev->get_stats       = bnep_net_get_stats;
	dev->do_ioctl        = bnep_net_ioctl;
	dev->set_mac_address = bnep_net_set_mac_addr;
	dev->set_multicast_list = bnep_net_set_mc_list;

	dev->watchdog_timeo  = HZ * 2;
	dev->tx_timeout      = bnep_net_timeout;
}
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 LT	28	#include <linux/module.h>
	29
	30	#include <linux/socket.h>
	31	#include <linux/netdevice.h>
	32	#include <linux/etherdevice.h>
	33	#include <linux/skbuff.h>
	34	#include <linux/wait.h>
	35
	36	#include <asm/unaligned.h>
	37
	38	#include <net/bluetooth/bluetooth.h>
	39	#include <net/bluetooth/hci_core.h>
	40	#include <net/bluetooth/l2cap.h>
	41
	42	#include "bnep.h"
	43
1da177e4 LT	44	#define BNEP_TX_QUEUE_LEN 20
	45
	46	static int bnep_net_open(struct net_device *dev)
	47	{
	48	netif_start_queue(dev);
	49	return 0;
	50	}
	51
	52	static int bnep_net_close(struct net_device *dev)
	53	{
	54	netif_stop_queue(dev);
	55	return 0;
	56	}
	57
	58	static struct net_device_stats bnep_net_get_stats(struct net_device dev)
	59	{
524ad0a7	60	struct bnep_session *s = netdev_priv(dev);
1da177e4 LT	61	return &s->stats;
	62	}
	63
	64	static void bnep_net_set_mc_list(struct net_device *dev)
	65	{
	66	#ifdef CONFIG_BT_BNEP_MC_FILTER
524ad0a7	67	struct bnep_session *s = netdev_priv(dev);
1da177e4 LT	68	struct sock *sk = s->sock->sk;
	69	struct bnep_set_filter_req *r;
	70	struct sk_buff *skb;
	71	int size;
	72
	73	BT_DBG("%s mc_count %d", dev->name, dev->mc_count);
	74
	75	size = sizeof(r) + (BNEP_MAX_MULTICAST_FILTERS + 1) ETH_ALEN * 2;
	76	skb = alloc_skb(size, GFP_ATOMIC);
	77	if (!skb) {
	78	BT_ERR("%s Multicast list allocation failed", dev->name);
	79	return;
	80	}
	81
	82	r = (void *) skb->data;
	83	__skb_put(skb, sizeof(*r));
	84
	85	r->type = BNEP_CONTROL;
	86	r->ctrl = BNEP_FILTER_MULTI_ADDR_SET;
	87
8e87d142	88	if (dev->flags & (IFF_PROMISC \| IFF_ALLMULTI)) {
1da177e4 LT	89	u8 start[ETH_ALEN] = { 0x01 };
	90
	91	/* Request all addresses */
	92	memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN);
	93	memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
	94	r->len = htons(ETH_ALEN * 2);
	95	} else {
8e87d142	96	struct dev_mc_list *dmi = dev->mc_list;
1da177e4 LT	97	int i, len = skb->len;
	98
	99	if (dev->flags & IFF_BROADCAST) {
	100	memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
	101	memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
8e87d142 YH	102	}
8e87d142 YH	103
1da177e4 LT	104	/* FIXME: We should group addresses here. */
	105
	106	for (i = 0; i < dev->mc_count && i < BNEP_MAX_MULTICAST_FILTERS; i++) {
	107	memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN);
	108	memcpy(__skb_put(skb, ETH_ALEN), dmi->dmi_addr, ETH_ALEN);
	109	dmi = dmi->next;
	110	}
	111	r->len = htons(skb->len - len);
	112	}
	113
	114	skb_queue_tail(&sk->sk_write_queue, skb);
	115	wake_up_interruptible(sk->sk_sleep);
	116	#endif
	117	}
	118
	119	static int bnep_net_set_mac_addr(struct net_device dev, void arg)
	120	{
	121	BT_DBG("%s", dev->name);
	122	return 0;
	123	}
	124
	125	static void bnep_net_timeout(struct net_device *dev)
	126	{
	127	BT_DBG("net_timeout");
	128	netif_wake_queue(dev);
	129	}
	130
	131	static int bnep_net_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	132	{
	133	return -EINVAL;
	134	}
	135
	136	#ifdef CONFIG_BT_BNEP_MC_FILTER
	137	static inline int bnep_net_mc_filter(struct sk_buff skb, struct bnep_session s)
	138	{
	139	struct ethhdr eh = (void ) skb->data;
	140
	141	if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter))
	142	return 1;
	143	return 0;
	144	}
	145	#endif
	146
	147	#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	148	/* Determine ether protocol. Based on eth_type_trans. */
	149	static inline u16 bnep_net_eth_proto(struct sk_buff *skb)
	150	{
	151	struct ethhdr eh = (void ) skb->data;
e41d2169	152	u16 proto = ntohs(eh->h_proto);
8e87d142	153
e41d2169 AV	154	if (proto >= 1536)
e41d2169 AV	155	return proto;
8e87d142	156
e41d2169 AV	157	if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
e41d2169 AV	158	return ETH_P_802_3;
8e87d142	159
e41d2169	160	return ETH_P_802_2;
1da177e4 LT	161	}
	162
	163	static inline int bnep_net_proto_filter(struct sk_buff skb, struct bnep_session s)
	164	{
	165	u16 proto = bnep_net_eth_proto(skb);
	166	struct bnep_proto_filter *f = s->proto_filter;
	167	int i;
8e87d142	168
1da177e4 LT	169	for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) {
	170	if (proto >= f[i].start && proto <= f[i].end)
	171	return 0;
	172	}
	173
	174	BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto);
	175	return 1;
	176	}
	177	#endif
	178
	179	static int bnep_net_xmit(struct sk_buff skb, struct net_device dev)
	180	{
524ad0a7	181	struct bnep_session *s = netdev_priv(dev);
1da177e4 LT	182	struct sock *sk = s->sock->sk;
	183
	184	BT_DBG("skb %p, dev %p", skb, dev);
	185
	186	#ifdef CONFIG_BT_BNEP_MC_FILTER
	187	if (bnep_net_mc_filter(skb, s)) {
	188	kfree_skb(skb);
	189	return 0;
	190	}
	191	#endif
8e87d142	192
1da177e4 LT	193	#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	194	if (bnep_net_proto_filter(skb, s)) {
	195	kfree_skb(skb);
	196	return 0;
	197	}
	198	#endif
8e87d142	199
1da177e4 LT	200	/*
	201	* We cannot send L2CAP packets from here as we are potentially in a bh.
	202	* So we have to queue them and wake up session thread which is sleeping
	203	* on the sk->sk_sleep.
	204	*/
	205	dev->trans_start = jiffies;
	206	skb_queue_tail(&sk->sk_write_queue, skb);
	207	wake_up_interruptible(sk->sk_sleep);
	208
	209	if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) {
	210	BT_DBG("tx queue is full");
	211
	212	/* Stop queuing.
	213	* Session thread will do netif_wake_queue() */
	214	netif_stop_queue(dev);
	215	}
	216
	217	return 0;
	218	}
	219
	220	void bnep_net_setup(struct net_device *dev)
	221	{
	222
	223	memset(dev->broadcast, 0xff, ETH_ALEN);
	224	dev->addr_len = ETH_ALEN;
	225
	226	ether_setup(dev);
	227
	228	dev->open = bnep_net_open;
	229	dev->stop = bnep_net_close;
	230	dev->hard_start_xmit = bnep_net_xmit;
	231	dev->get_stats = bnep_net_get_stats;
	232	dev->do_ioctl = bnep_net_ioctl;
	233	dev->set_mac_address = bnep_net_set_mac_addr;
	234	dev->set_multicast_list = bnep_net_set_mc_list;
	235
	236	dev->watchdog_timeo = HZ * 2;
	237	dev->tx_timeout = bnep_net_timeout;
	238	}