2 BNEP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2001-2002 Inventel Systemes
5 Clément Moreau <clement.moreau@inventel.fr>
6 David Libault <david.libault@inventel.fr>
8 Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
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;
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
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
21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
24 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
25 SOFTWARE IS DISCLAIMED.
28 #include <linux/export.h>
29 #include <linux/etherdevice.h>
31 #include <net/bluetooth/bluetooth.h>
32 #include <net/bluetooth/hci_core.h>
33 #include <net/bluetooth/l2cap.h>
37 #define BNEP_TX_QUEUE_LEN 20
39 static int bnep_net_open(struct net_device *dev)
41 netif_start_queue(dev);
45 static int bnep_net_close(struct net_device *dev)
47 netif_stop_queue(dev);
51 static void bnep_net_set_mc_list(struct net_device *dev)
53 #ifdef CONFIG_BT_BNEP_MC_FILTER
54 struct bnep_session *s = netdev_priv(dev);
55 struct sock *sk = s->sock->sk;
56 struct bnep_set_filter_req *r;
60 BT_DBG("%s mc_count %d", dev->name, netdev_mc_count(dev));
62 size = sizeof(*r) + (BNEP_MAX_MULTICAST_FILTERS + 1) * ETH_ALEN * 2;
63 skb = alloc_skb(size, GFP_ATOMIC);
65 BT_ERR("%s Multicast list allocation failed", dev->name);
69 r = (void *) skb->data;
70 __skb_put(skb, sizeof(*r));
72 r->type = BNEP_CONTROL;
73 r->ctrl = BNEP_FILTER_MULTI_ADDR_SET;
75 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
76 u8 start[ETH_ALEN] = { 0x01 };
78 /* Request all addresses */
79 memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN);
80 memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
81 r->len = htons(ETH_ALEN * 2);
83 struct netdev_hw_addr *ha;
84 int i, len = skb->len;
86 if (dev->flags & IFF_BROADCAST) {
87 memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
88 memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
91 /* FIXME: We should group addresses here. */
94 netdev_for_each_mc_addr(ha, dev) {
95 if (i == BNEP_MAX_MULTICAST_FILTERS)
97 memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);
98 memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);
102 r->len = htons(skb->len - len);
105 skb_queue_tail(&sk->sk_write_queue, skb);
106 wake_up_interruptible(sk_sleep(sk));
110 static int bnep_net_set_mac_addr(struct net_device *dev, void *arg)
112 BT_DBG("%s", dev->name);
116 static void bnep_net_timeout(struct net_device *dev)
118 BT_DBG("net_timeout");
119 netif_wake_queue(dev);
122 #ifdef CONFIG_BT_BNEP_MC_FILTER
123 static int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s)
125 struct ethhdr *eh = (void *) skb->data;
127 if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter))
133 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
134 /* Determine ether protocol. Based on eth_type_trans. */
135 static u16 bnep_net_eth_proto(struct sk_buff *skb)
137 struct ethhdr *eh = (void *) skb->data;
138 u16 proto = ntohs(eh->h_proto);
143 if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
149 static int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s)
151 u16 proto = bnep_net_eth_proto(skb);
152 struct bnep_proto_filter *f = s->proto_filter;
155 for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) {
156 if (proto >= f[i].start && proto <= f[i].end)
160 BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto);
165 static netdev_tx_t bnep_net_xmit(struct sk_buff *skb,
166 struct net_device *dev)
168 struct bnep_session *s = netdev_priv(dev);
169 struct sock *sk = s->sock->sk;
171 BT_DBG("skb %p, dev %p", skb, dev);
173 #ifdef CONFIG_BT_BNEP_MC_FILTER
174 if (bnep_net_mc_filter(skb, s)) {
180 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
181 if (bnep_net_proto_filter(skb, s)) {
188 * We cannot send L2CAP packets from here as we are potentially in a bh.
189 * So we have to queue them and wake up session thread which is sleeping
190 * on the sk_sleep(sk).
192 dev->trans_start = jiffies;
193 skb_queue_tail(&sk->sk_write_queue, skb);
194 wake_up_interruptible(sk_sleep(sk));
196 if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) {
197 BT_DBG("tx queue is full");
200 * Session thread will do netif_wake_queue() */
201 netif_stop_queue(dev);
207 static const struct net_device_ops bnep_netdev_ops = {
208 .ndo_open = bnep_net_open,
209 .ndo_stop = bnep_net_close,
210 .ndo_start_xmit = bnep_net_xmit,
211 .ndo_validate_addr = eth_validate_addr,
212 .ndo_set_rx_mode = bnep_net_set_mc_list,
213 .ndo_set_mac_address = bnep_net_set_mac_addr,
214 .ndo_tx_timeout = bnep_net_timeout,
215 .ndo_change_mtu = eth_change_mtu,
219 void bnep_net_setup(struct net_device *dev)
222 memset(dev->broadcast, 0xff, ETH_ALEN);
223 dev->addr_len = ETH_ALEN;
226 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
227 dev->netdev_ops = &bnep_netdev_ops;
229 dev->watchdog_timeo = HZ * 2;