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/module.h>
30 #include <linux/socket.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/skbuff.h>
34 #include <linux/wait.h>
36 #include <asm/unaligned.h>
38 #include <net/bluetooth/bluetooth.h>
39 #include <net/bluetooth/hci_core.h>
40 #include <net/bluetooth/l2cap.h>
44 #define BNEP_TX_QUEUE_LEN 20
46 static int bnep_net_open(struct net_device
*dev
)
48 netif_start_queue(dev
);
52 static int bnep_net_close(struct net_device
*dev
)
54 netif_stop_queue(dev
);
58 static void bnep_net_set_mc_list(struct net_device
*dev
)
60 #ifdef CONFIG_BT_BNEP_MC_FILTER
61 struct bnep_session
*s
= netdev_priv(dev
);
62 struct sock
*sk
= s
->sock
->sk
;
63 struct bnep_set_filter_req
*r
;
67 BT_DBG("%s mc_count %d", dev
->name
, netdev_mc_count(dev
));
69 size
= sizeof(*r
) + (BNEP_MAX_MULTICAST_FILTERS
+ 1) * ETH_ALEN
* 2;
70 skb
= alloc_skb(size
, GFP_ATOMIC
);
72 BT_ERR("%s Multicast list allocation failed", dev
->name
);
76 r
= (void *) skb
->data
;
77 __skb_put(skb
, sizeof(*r
));
79 r
->type
= BNEP_CONTROL
;
80 r
->ctrl
= BNEP_FILTER_MULTI_ADDR_SET
;
82 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
83 u8 start
[ETH_ALEN
] = { 0x01 };
85 /* Request all addresses */
86 memcpy(__skb_put(skb
, ETH_ALEN
), start
, ETH_ALEN
);
87 memcpy(__skb_put(skb
, ETH_ALEN
), dev
->broadcast
, ETH_ALEN
);
88 r
->len
= htons(ETH_ALEN
* 2);
90 struct dev_mc_list
*dmi
= dev
->mc_list
;
91 int i
, len
= skb
->len
;
93 if (dev
->flags
& IFF_BROADCAST
) {
94 memcpy(__skb_put(skb
, ETH_ALEN
), dev
->broadcast
, ETH_ALEN
);
95 memcpy(__skb_put(skb
, ETH_ALEN
), dev
->broadcast
, ETH_ALEN
);
98 /* FIXME: We should group addresses here. */
101 i
< netdev_mc_count(dev
) && i
< BNEP_MAX_MULTICAST_FILTERS
;
103 memcpy(__skb_put(skb
, ETH_ALEN
), dmi
->dmi_addr
, ETH_ALEN
);
104 memcpy(__skb_put(skb
, ETH_ALEN
), dmi
->dmi_addr
, ETH_ALEN
);
107 r
->len
= htons(skb
->len
- len
);
110 skb_queue_tail(&sk
->sk_write_queue
, skb
);
111 wake_up_interruptible(sk
->sk_sleep
);
115 static int bnep_net_set_mac_addr(struct net_device
*dev
, void *arg
)
117 BT_DBG("%s", dev
->name
);
121 static void bnep_net_timeout(struct net_device
*dev
)
123 BT_DBG("net_timeout");
124 netif_wake_queue(dev
);
127 #ifdef CONFIG_BT_BNEP_MC_FILTER
128 static inline int bnep_net_mc_filter(struct sk_buff
*skb
, struct bnep_session
*s
)
130 struct ethhdr
*eh
= (void *) skb
->data
;
132 if ((eh
->h_dest
[0] & 1) && !test_bit(bnep_mc_hash(eh
->h_dest
), (ulong
*) &s
->mc_filter
))
138 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
139 /* Determine ether protocol. Based on eth_type_trans. */
140 static inline u16
bnep_net_eth_proto(struct sk_buff
*skb
)
142 struct ethhdr
*eh
= (void *) skb
->data
;
143 u16 proto
= ntohs(eh
->h_proto
);
148 if (get_unaligned((__be16
*) skb
->data
) == htons(0xFFFF))
154 static inline int bnep_net_proto_filter(struct sk_buff
*skb
, struct bnep_session
*s
)
156 u16 proto
= bnep_net_eth_proto(skb
);
157 struct bnep_proto_filter
*f
= s
->proto_filter
;
160 for (i
= 0; i
< BNEP_MAX_PROTO_FILTERS
&& f
[i
].end
; i
++) {
161 if (proto
>= f
[i
].start
&& proto
<= f
[i
].end
)
165 BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb
, proto
);
170 static netdev_tx_t
bnep_net_xmit(struct sk_buff
*skb
,
171 struct net_device
*dev
)
173 struct bnep_session
*s
= netdev_priv(dev
);
174 struct sock
*sk
= s
->sock
->sk
;
176 BT_DBG("skb %p, dev %p", skb
, dev
);
178 #ifdef CONFIG_BT_BNEP_MC_FILTER
179 if (bnep_net_mc_filter(skb
, s
)) {
185 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
186 if (bnep_net_proto_filter(skb
, s
)) {
193 * We cannot send L2CAP packets from here as we are potentially in a bh.
194 * So we have to queue them and wake up session thread which is sleeping
195 * on the sk->sk_sleep.
197 dev
->trans_start
= jiffies
;
198 skb_queue_tail(&sk
->sk_write_queue
, skb
);
199 wake_up_interruptible(sk
->sk_sleep
);
201 if (skb_queue_len(&sk
->sk_write_queue
) >= BNEP_TX_QUEUE_LEN
) {
202 BT_DBG("tx queue is full");
205 * Session thread will do netif_wake_queue() */
206 netif_stop_queue(dev
);
212 static const struct net_device_ops bnep_netdev_ops
= {
213 .ndo_open
= bnep_net_open
,
214 .ndo_stop
= bnep_net_close
,
215 .ndo_start_xmit
= bnep_net_xmit
,
216 .ndo_validate_addr
= eth_validate_addr
,
217 .ndo_set_multicast_list
= bnep_net_set_mc_list
,
218 .ndo_set_mac_address
= bnep_net_set_mac_addr
,
219 .ndo_tx_timeout
= bnep_net_timeout
,
220 .ndo_change_mtu
= eth_change_mtu
,
224 void bnep_net_setup(struct net_device
*dev
)
227 memset(dev
->broadcast
, 0xff, ETH_ALEN
);
228 dev
->addr_len
= ETH_ALEN
;
231 dev
->netdev_ops
= &bnep_netdev_ops
;
233 dev
->watchdog_timeo
= HZ
* 2;