net/bluetooth/bnep/netdev.c - kernel/msm-4.19 - Gitiles

 /*
    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.
 */

 /*
  * $Id: netdev.c,v 1.8 2002/08/04 21:23:58 maxk Exp $
  */

 #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"

 #ifndef CONFIG_BT_BNEP_DEBUG
 #undef  BT_DBG
 #define BT_DBG( A... )
 #endif

 #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 = dev->priv;
 	return &s->stats;
 }

 static void bnep_net_set_mc_list(struct net_device *dev)
 {
 #ifdef CONFIG_BT_BNEP_MC_FILTER
 	struct bnep_session *s = dev->priv;
 	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 = dev->priv;
 	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;
 }
	/*
	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.
	*/

	/*
	* $Id: netdev.c,v 1.8 2002/08/04 21:23:58 maxk Exp $
	*/

	#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"

	#ifndef CONFIG_BT_BNEP_DEBUG
	#undef BT_DBG
	#define BT_DBG( A... )
	#endif

	#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 = dev->priv;
	return &s->stats;
	}

	static void bnep_net_set_mc_list(struct net_device *dev)
	{
	#ifdef CONFIG_BT_BNEP_MC_FILTER
	struct bnep_session *s = dev->priv;
	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 = dev->priv;
	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;
	}