You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
246 lines
6.2 KiB
246 lines
6.2 KiB
/*
|
|
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;
|
|
|
|
if (ntohs(eh->h_proto) >= 1536)
|
|
return eh->h_proto;
|
|
|
|
if (get_unaligned((u16 *) skb->data) == 0xFFFF)
|
|
return htons(ETH_P_802_3);
|
|
|
|
return htons(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;
|
|
}
|
|
|