patch-2.4.20 linux-2.4.20/net/bluetooth/bnep/netdev.c

• Lines: 251
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/net/bluetooth/bnep/netdev.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/net/bluetooth/bnep/netdev.c linux-2.4.20/net/bluetooth/bnep/netdev.c
@@ -0,0 +1,250 @@
+/* 
+   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 Krasnyanskiy <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 1.7 2002/07/14 05:39:26 maxk Exp $
+ */ 
+
+#include <linux/config.h>
+#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_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_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->write_queue, skb);
+	wake_up_interruptible(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_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), &s->mc_filter))
+		return 1;
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_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_BNEP_MC_FILTER
+	if (bnep_net_mc_filter(skb, s)) {
+		kfree_skb(skb);
+		return 0;
+	}
+#endif
+	
+#ifdef CONFIG_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->sleep.
+	 */
+	dev->trans_start = jiffies;
+	skb_queue_tail(&sk->write_queue, skb);
+	wake_up_interruptible(sk->sleep);
+
+	if (skb_queue_len(&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;
+}
+
+int bnep_net_init(struct net_device *dev)
+{
+	struct bnep_session *s = dev->priv;
+
+	memcpy(dev->dev_addr, s->eh.h_dest, 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;
+
+	return 0;
+}