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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | BNEP implementation for Linux Bluetooth stack (BlueZ). |
3 | Copyright (C) 2001-2002 Inventel Systemes | |
4 | Written 2001-2002 by | |
96de0e25 | 5 | Clément Moreau <clement.moreau@inventel.fr> |
1da177e4 LT |
6 | David Libault <david.libault@inventel.fr> |
7 | ||
8 | Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> | |
9 | ||
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; | |
13 | ||
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 | |
8e87d142 YH |
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 | |
1da177e4 LT |
21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
22 | ||
8e87d142 YH |
23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
25 | SOFTWARE IS DISCLAIMED. |
26 | */ | |
27 | ||
1da177e4 | 28 | #include <linux/module.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
1da177e4 LT |
30 | |
31 | #include <linux/socket.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/etherdevice.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/wait.h> | |
36 | ||
37 | #include <asm/unaligned.h> | |
38 | ||
39 | #include <net/bluetooth/bluetooth.h> | |
40 | #include <net/bluetooth/hci_core.h> | |
41 | #include <net/bluetooth/l2cap.h> | |
42 | ||
43 | #include "bnep.h" | |
44 | ||
1da177e4 LT |
45 | #define BNEP_TX_QUEUE_LEN 20 |
46 | ||
47 | static int bnep_net_open(struct net_device *dev) | |
48 | { | |
49 | netif_start_queue(dev); | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static int bnep_net_close(struct net_device *dev) | |
54 | { | |
55 | netif_stop_queue(dev); | |
56 | return 0; | |
57 | } | |
58 | ||
1da177e4 LT |
59 | static void bnep_net_set_mc_list(struct net_device *dev) |
60 | { | |
61 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
524ad0a7 | 62 | struct bnep_session *s = netdev_priv(dev); |
1da177e4 LT |
63 | struct sock *sk = s->sock->sk; |
64 | struct bnep_set_filter_req *r; | |
65 | struct sk_buff *skb; | |
66 | int size; | |
67 | ||
4cd24eaf | 68 | BT_DBG("%s mc_count %d", dev->name, netdev_mc_count(dev)); |
1da177e4 LT |
69 | |
70 | size = sizeof(*r) + (BNEP_MAX_MULTICAST_FILTERS + 1) * ETH_ALEN * 2; | |
71 | skb = alloc_skb(size, GFP_ATOMIC); | |
72 | if (!skb) { | |
73 | BT_ERR("%s Multicast list allocation failed", dev->name); | |
74 | return; | |
75 | } | |
76 | ||
77 | r = (void *) skb->data; | |
78 | __skb_put(skb, sizeof(*r)); | |
79 | ||
80 | r->type = BNEP_CONTROL; | |
81 | r->ctrl = BNEP_FILTER_MULTI_ADDR_SET; | |
82 | ||
8e87d142 | 83 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
1da177e4 LT |
84 | u8 start[ETH_ALEN] = { 0x01 }; |
85 | ||
86 | /* Request all addresses */ | |
87 | memcpy(__skb_put(skb, ETH_ALEN), start, ETH_ALEN); | |
88 | memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); | |
89 | r->len = htons(ETH_ALEN * 2); | |
90 | } else { | |
22bedad3 | 91 | struct netdev_hw_addr *ha; |
1da177e4 LT |
92 | int i, len = skb->len; |
93 | ||
94 | if (dev->flags & IFF_BROADCAST) { | |
95 | memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); | |
96 | memcpy(__skb_put(skb, ETH_ALEN), dev->broadcast, ETH_ALEN); | |
8e87d142 YH |
97 | } |
98 | ||
1da177e4 LT |
99 | /* FIXME: We should group addresses here. */ |
100 | ||
ff6e2163 | 101 | i = 0; |
22bedad3 | 102 | netdev_for_each_mc_addr(ha, dev) { |
ff6e2163 JP |
103 | if (i == BNEP_MAX_MULTICAST_FILTERS) |
104 | break; | |
22bedad3 JP |
105 | memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN); |
106 | memcpy(__skb_put(skb, ETH_ALEN), ha->addr, ETH_ALEN); | |
1a61a83f GP |
107 | |
108 | i++; | |
1da177e4 LT |
109 | } |
110 | r->len = htons(skb->len - len); | |
111 | } | |
112 | ||
113 | skb_queue_tail(&sk->sk_write_queue, skb); | |
aa395145 | 114 | wake_up_interruptible(sk_sleep(sk)); |
1da177e4 LT |
115 | #endif |
116 | } | |
117 | ||
118 | static int bnep_net_set_mac_addr(struct net_device *dev, void *arg) | |
119 | { | |
120 | BT_DBG("%s", dev->name); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static void bnep_net_timeout(struct net_device *dev) | |
125 | { | |
126 | BT_DBG("net_timeout"); | |
127 | netif_wake_queue(dev); | |
128 | } | |
129 | ||
1da177e4 | 130 | #ifdef CONFIG_BT_BNEP_MC_FILTER |
6039aa73 | 131 | static int bnep_net_mc_filter(struct sk_buff *skb, struct bnep_session *s) |
1da177e4 LT |
132 | { |
133 | struct ethhdr *eh = (void *) skb->data; | |
134 | ||
135 | if ((eh->h_dest[0] & 1) && !test_bit(bnep_mc_hash(eh->h_dest), (ulong *) &s->mc_filter)) | |
136 | return 1; | |
137 | return 0; | |
138 | } | |
139 | #endif | |
140 | ||
141 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
142 | /* Determine ether protocol. Based on eth_type_trans. */ | |
6039aa73 | 143 | static u16 bnep_net_eth_proto(struct sk_buff *skb) |
1da177e4 LT |
144 | { |
145 | struct ethhdr *eh = (void *) skb->data; | |
e41d2169 | 146 | u16 proto = ntohs(eh->h_proto); |
8e87d142 | 147 | |
e41d2169 AV |
148 | if (proto >= 1536) |
149 | return proto; | |
8e87d142 | 150 | |
e41d2169 AV |
151 | if (get_unaligned((__be16 *) skb->data) == htons(0xFFFF)) |
152 | return ETH_P_802_3; | |
8e87d142 | 153 | |
e41d2169 | 154 | return ETH_P_802_2; |
1da177e4 LT |
155 | } |
156 | ||
6039aa73 | 157 | static int bnep_net_proto_filter(struct sk_buff *skb, struct bnep_session *s) |
1da177e4 LT |
158 | { |
159 | u16 proto = bnep_net_eth_proto(skb); | |
160 | struct bnep_proto_filter *f = s->proto_filter; | |
161 | int i; | |
8e87d142 | 162 | |
1da177e4 LT |
163 | for (i = 0; i < BNEP_MAX_PROTO_FILTERS && f[i].end; i++) { |
164 | if (proto >= f[i].start && proto <= f[i].end) | |
165 | return 0; | |
166 | } | |
167 | ||
168 | BT_DBG("BNEP: filtered skb %p, proto 0x%.4x", skb, proto); | |
169 | return 1; | |
170 | } | |
171 | #endif | |
172 | ||
6fef4c0c SH |
173 | static netdev_tx_t bnep_net_xmit(struct sk_buff *skb, |
174 | struct net_device *dev) | |
1da177e4 | 175 | { |
524ad0a7 | 176 | struct bnep_session *s = netdev_priv(dev); |
1da177e4 LT |
177 | struct sock *sk = s->sock->sk; |
178 | ||
179 | BT_DBG("skb %p, dev %p", skb, dev); | |
180 | ||
181 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
182 | if (bnep_net_mc_filter(skb, s)) { | |
183 | kfree_skb(skb); | |
6ed10654 | 184 | return NETDEV_TX_OK; |
1da177e4 LT |
185 | } |
186 | #endif | |
8e87d142 | 187 | |
1da177e4 LT |
188 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER |
189 | if (bnep_net_proto_filter(skb, s)) { | |
190 | kfree_skb(skb); | |
6ed10654 | 191 | return NETDEV_TX_OK; |
1da177e4 LT |
192 | } |
193 | #endif | |
8e87d142 | 194 | |
1da177e4 LT |
195 | /* |
196 | * We cannot send L2CAP packets from here as we are potentially in a bh. | |
197 | * So we have to queue them and wake up session thread which is sleeping | |
aa395145 | 198 | * on the sk_sleep(sk). |
1da177e4 LT |
199 | */ |
200 | dev->trans_start = jiffies; | |
201 | skb_queue_tail(&sk->sk_write_queue, skb); | |
aa395145 | 202 | wake_up_interruptible(sk_sleep(sk)); |
1da177e4 LT |
203 | |
204 | if (skb_queue_len(&sk->sk_write_queue) >= BNEP_TX_QUEUE_LEN) { | |
205 | BT_DBG("tx queue is full"); | |
206 | ||
207 | /* Stop queuing. | |
208 | * Session thread will do netif_wake_queue() */ | |
209 | netif_stop_queue(dev); | |
210 | } | |
211 | ||
6ed10654 | 212 | return NETDEV_TX_OK; |
1da177e4 LT |
213 | } |
214 | ||
b4d7f0a4 SH |
215 | static const struct net_device_ops bnep_netdev_ops = { |
216 | .ndo_open = bnep_net_open, | |
217 | .ndo_stop = bnep_net_close, | |
218 | .ndo_start_xmit = bnep_net_xmit, | |
219 | .ndo_validate_addr = eth_validate_addr, | |
afc4b13d | 220 | .ndo_set_rx_mode = bnep_net_set_mc_list, |
b4d7f0a4 SH |
221 | .ndo_set_mac_address = bnep_net_set_mac_addr, |
222 | .ndo_tx_timeout = bnep_net_timeout, | |
223 | .ndo_change_mtu = eth_change_mtu, | |
224 | ||
225 | }; | |
226 | ||
1da177e4 LT |
227 | void bnep_net_setup(struct net_device *dev) |
228 | { | |
229 | ||
230 | memset(dev->broadcast, 0xff, ETH_ALEN); | |
231 | dev->addr_len = ETH_ALEN; | |
232 | ||
233 | ether_setup(dev); | |
550fd08c | 234 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
b4d7f0a4 | 235 | dev->netdev_ops = &bnep_netdev_ops; |
1da177e4 LT |
236 | |
237 | dev->watchdog_timeo = HZ * 2; | |
1da177e4 | 238 | } |