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/etherdevice.h>
30 #include <net/bluetooth/bluetooth.h>
31 #include <net/bluetooth/hci_core.h>
32 #include <net/bluetooth/l2cap.h>
36 #define BNEP_TX_QUEUE_LEN 20
38 static int bnep_net_open(struct net_device *dev)
40 netif_start_queue(dev);
44 static int bnep_net_close(struct net_device *dev)
46 netif_stop_queue(dev);
50 static void bnep_net_set_mc_list(struct net_device *dev)
52 #ifdef CONFIG_BT_BNEP_MC_FILTER
53 struct bnep_session *s = netdev_priv(dev);
54 struct sock *sk = s->sock->sk;
55 struct bnep_set_filter_req *r;
59 BT_DBG("%s mc_count %d", dev->name, netdev_mc_count(dev));
61 size = sizeof(*r) + (BNEP_MAX_MULTICAST_FILTERS + 1) * ETH_ALEN * 2;
62 skb = alloc_skb(size, GFP_ATOMIC);
64 BT_ERR("%s Multicast list allocation failed", dev->name);
68 r = (void *) skb->data;
69 __skb_put(skb, sizeof(*r));
71 r->type = BNEP_CONTROL;
72 r->ctrl = BNEP_FILTER_MULTI_ADDR_SET;
74 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
75 u8 start[ETH_ALEN] = { 0x01 };
77 /* Request all addresses */
78 memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN);
79 memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
80 r->len = htons(ETH_ALEN * 2);
82 struct netdev_hw_addr *ha;
83 int i, len = skb->len;
85 if (dev->flags & IFF_BROADCAST) {
86 memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
87 memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN);
90 /* FIXME: We should group addresses here. */
93 netdev_for_each_mc_addr(ha, dev) {
94 if (i == BNEP_MAX_MULTICAST_FILTERS)
96 memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);
97 memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN);
101 r->len = htons(skb->len - len);
104 skb_queue_tail(&sk->sk_write_queue, skb);
105 wake_up_interruptible(sk_sleep(sk));
109 static int bnep_net_set_mac_addr(struct net_device *dev, void *arg)
111 BT_DBG("%s", dev->name);
115 static void bnep_net_timeout(struct net_device *dev)
117 BT_DBG("net_timeout");
118 netif_wake_queue(dev);
121 #ifdef CONFIG_BT_BNEP_MC_FILTER
122 static int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s)
124 struct ethhdr *eh = (void *) skb->data;
126 if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter))
132 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
133 /* Determine ether protocol. Based on eth_type_trans. */
134 static u16 bnep_net_eth_proto(struct sk_buff *skb)
136 struct ethhdr *eh = (void *) skb->data;
137 u16 proto = ntohs(eh->h_proto);
139 #ifdef CONFIG_TIZEN_WIP /* Compilation Error */
142 if (proto >= ETH_P_802_3_MIN)
143 #endif /* Compilation Error */
146 if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF))
152 static int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s)
154 u16 proto = bnep_net_eth_proto(skb);
155 struct bnep_proto_filter *f = s->proto_filter;
158 for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) {
159 if (proto >= f[i].start && proto <= f[i].end)
163 BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto);
168 static netdev_tx_t bnep_net_xmit(struct sk_buff *skb,
169 struct net_device *dev)
171 struct bnep_session *s = netdev_priv(dev);
172 struct sock *sk = s->sock->sk;
174 BT_DBG("skb %p, dev %p", skb, dev);
176 #ifdef CONFIG_BT_BNEP_MC_FILTER
177 if (bnep_net_mc_filter(skb, s)) {
183 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
184 if (bnep_net_proto_filter(skb, s)) {
191 * We cannot send L2CAP packets from here as we are potentially in a bh.
192 * So we have to queue them and wake up session thread which is sleeping
193 * on the sk_sleep(sk).
195 dev->trans_start = jiffies;
196 skb_queue_tail(&sk->sk_write_queue, skb);
197 wake_up_interruptible(sk_sleep(sk));
199 if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) {
200 BT_DBG("tx queue is full");
203 * Session thread will do netif_wake_queue() */
204 netif_stop_queue(dev);
210 static const struct net_device_ops bnep_netdev_ops = {
211 .ndo_open = bnep_net_open,
212 .ndo_stop = bnep_net_close,
213 .ndo_start_xmit = bnep_net_xmit,
214 .ndo_validate_addr = eth_validate_addr,
215 .ndo_set_rx_mode = bnep_net_set_mc_list,
216 .ndo_set_mac_address = bnep_net_set_mac_addr,
217 .ndo_tx_timeout = bnep_net_timeout,
218 .ndo_change_mtu = eth_change_mtu,
222 void bnep_net_setup(struct net_device *dev)
225 memset(dev->broadcast, 0xff, ETH_ALEN);
226 dev->addr_len = ETH_ALEN;
229 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
230 dev->netdev_ops = &bnep_netdev_ops;
232 dev->watchdog_timeo = HZ * 2;