[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 netdev_hw_addr *ha;
		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. */

		i = 0;
		netdev_for_each_mc_addr(ha, dev) {
			if (i == BNEP_MAX_MULTICAST_FILTERS)
				break;
			memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);
			memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);

			i++;
		}
		r->len = htons(skb->len - len);
	}

	skb_queue_tail(&sk->sk_write_queue, skb);
	wake_up_interruptible(sk_sleep(sk));
#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 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 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 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_sleep(sk).
	 */
	dev->trans_start = jiffies;
	skb_queue_tail(&sk->sk_write_queue, skb);
	wake_up_interruptible(sk_sleep(sk));

	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_rx_mode     = 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->priv_flags &= ~IFF_TX_SKB_SHARING;
	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 {
22bedad3	91	struct netdev_hw_addr *ha;
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
ff6e2163	101	i = 0;
22bedad3	102	netdev_for_each_mc_addr(ha, dev) {
ff6e2163 JP	103	if (i == BNEP_MAX_MULTICAST_FILTERS)
ff6e2163 JP	104	break;
22bedad3 JP	105	memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);
22bedad3 JP	106	memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);
1a61a83f GP	107
1a61a83f GP	108	i++;
1da177e4 LT	109	}
	110	r->len = htons(skb->len - len);
	111	}
	112
	113	skb_queue_tail(&sk->sk_write_queue, skb);
aa395145	114	wake_up_interruptible(sk_sleep(sk));
1da177e4 LT	115	#endif
	116	}
	117
	118	static int bnep_net_set_mac_addr(struct net_device dev, void arg)
	119	{
	120	BT_DBG("%s", dev->name);
	121	return 0;
	122	}
	123
	124	static void bnep_net_timeout(struct net_device *dev)
	125	{
	126	BT_DBG("net_timeout");
	127	netif_wake_queue(dev);
	128	}
	129
1da177e4	130	#ifdef CONFIG_BT_BNEP_MC_FILTER
6039aa73	131	static int bnep_net_mc_filter(struct sk_buff skb, struct bnep_session s)
1da177e4 LT	132	{
	133	struct ethhdr eh = (void ) skb->data;
	134
	135	if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter))
	136	return 1;
	137	return 0;
	138	}
	139	#endif
	140
	141	#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	142	/* Determine ether protocol. Based on eth_type_trans. */
6039aa73	143	static u16 bnep_net_eth_proto(struct sk_buff *skb)
1da177e4 LT	144	{
1da177e4 LT	145	struct ethhdr eh = (void ) skb->data;
e41d2169	146	u16 proto = ntohs(eh->h_proto);
8e87d142	147
e41d2169 AV	148	if (proto >= 1536)
e41d2169 AV	149	return proto;
8e87d142	150
e41d2169 AV	151	if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
e41d2169 AV	152	return ETH_P_802_3;
8e87d142	153
e41d2169	154	return ETH_P_802_2;
1da177e4 LT	155	}
1da177e4 LT	156
6039aa73	157	static int bnep_net_proto_filter(struct sk_buff skb, struct bnep_session s)
1da177e4 LT	158	{
	159	u16 proto = bnep_net_eth_proto(skb);
	160	struct bnep_proto_filter *f = s->proto_filter;
	161	int i;
8e87d142	162
1da177e4 LT	163	for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) {
	164	if (proto >= f[i].start && proto <= f[i].end)
	165	return 0;
	166	}
	167
	168	BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto);
	169	return 1;
	170	}
	171	#endif
	172
6fef4c0c SH	173	static netdev_tx_t bnep_net_xmit(struct sk_buff *skb,
6fef4c0c SH	174	struct net_device *dev)
1da177e4	175	{
524ad0a7	176	struct bnep_session *s = netdev_priv(dev);
1da177e4 LT	177	struct sock *sk = s->sock->sk;
	178
	179	BT_DBG("skb %p, dev %p", skb, dev);
	180
	181	#ifdef CONFIG_BT_BNEP_MC_FILTER
	182	if (bnep_net_mc_filter(skb, s)) {
	183	kfree_skb(skb);
6ed10654	184	return NETDEV_TX_OK;
1da177e4 LT	185	}
1da177e4 LT	186	#endif
8e87d142	187
1da177e4 LT	188	#ifdef CONFIG_BT_BNEP_PROTO_FILTER
	189	if (bnep_net_proto_filter(skb, s)) {
	190	kfree_skb(skb);
6ed10654	191	return NETDEV_TX_OK;
1da177e4 LT	192	}
1da177e4 LT	193	#endif
8e87d142	194
1da177e4 LT	195	/*
	196	* We cannot send L2CAP packets from here as we are potentially in a bh.
	197	* So we have to queue them and wake up session thread which is sleeping
aa395145	198	* on the sk_sleep(sk).
1da177e4 LT	199	*/
	200	dev->trans_start = jiffies;
	201	skb_queue_tail(&sk->sk_write_queue, skb);
aa395145	202	wake_up_interruptible(sk_sleep(sk));
1da177e4 LT	203
	204	if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) {
	205	BT_DBG("tx queue is full");
	206
	207	/* Stop queuing.
	208	* Session thread will do netif_wake_queue() */
	209	netif_stop_queue(dev);
	210	}
	211
6ed10654	212	return NETDEV_TX_OK;
1da177e4 LT	213	}
1da177e4 LT	214
b4d7f0a4 SH	215	static const struct net_device_ops bnep_netdev_ops = {
	216	.ndo_open = bnep_net_open,
	217	.ndo_stop = bnep_net_close,
	218	.ndo_start_xmit = bnep_net_xmit,
	219	.ndo_validate_addr = eth_validate_addr,
afc4b13d	220	.ndo_set_rx_mode = bnep_net_set_mc_list,
b4d7f0a4 SH	221	.ndo_set_mac_address = bnep_net_set_mac_addr,
	222	.ndo_tx_timeout = bnep_net_timeout,
	223	.ndo_change_mtu = eth_change_mtu,
	224
	225	};
	226
1da177e4 LT	227	void bnep_net_setup(struct net_device *dev)
	228	{
	229
	230	memset(dev->broadcast, 0xff, ETH_ALEN);
	231	dev->addr_len = ETH_ALEN;
	232
	233	ether_setup(dev);
550fd08c	234	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
b4d7f0a4	235	dev->netdev_ops = &bnep_netdev_ops;
1da177e4 LT	236
1da177e4 LT	237	dev->watchdog_timeo = HZ * 2;
1da177e4	238	}