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Diffstat (limited to 'net/bluetooth/bnep/netdev.c')
-rw-r--r--net/bluetooth/bnep/netdev.c238
1 files changed, 238 insertions, 0 deletions
diff --git a/net/bluetooth/bnep/netdev.c b/net/bluetooth/bnep/netdev.c
new file mode 100644
index 00000000..bc408648
--- /dev/null
+++ b/net/bluetooth/bnep/netdev.c
@@ -0,0 +1,238 @@
+/*
+ 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 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 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;
+}
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