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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 LT |
28 | #include <linux/module.h> |
29 | ||
30 | #include <linux/kernel.h> | |
31 | #include <linux/sched.h> | |
32 | #include <linux/signal.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/wait.h> | |
83144186 | 35 | #include <linux/freezer.h> |
1da177e4 | 36 | #include <linux/errno.h> |
1da177e4 | 37 | #include <linux/net.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
f4d7cd4a | 39 | #include <linux/kthread.h> |
1da177e4 LT |
40 | #include <net/sock.h> |
41 | ||
42 | #include <linux/socket.h> | |
43 | #include <linux/file.h> | |
44 | ||
45 | #include <linux/netdevice.h> | |
46 | #include <linux/etherdevice.h> | |
47 | #include <linux/skbuff.h> | |
48 | ||
49 | #include <asm/unaligned.h> | |
50 | ||
51 | #include <net/bluetooth/bluetooth.h> | |
0a85b964 | 52 | #include <net/bluetooth/hci_core.h> |
1da177e4 LT |
53 | #include <net/bluetooth/l2cap.h> |
54 | ||
55 | #include "bnep.h" | |
56 | ||
28111eb2 MH |
57 | #define VERSION "1.3" |
58 | ||
59 | static int compress_src = 1; | |
60 | static int compress_dst = 1; | |
1da177e4 LT |
61 | |
62 | static LIST_HEAD(bnep_session_list); | |
63 | static DECLARE_RWSEM(bnep_session_sem); | |
64 | ||
65 | static struct bnep_session *__bnep_get_session(u8 *dst) | |
66 | { | |
67 | struct bnep_session *s; | |
1da177e4 LT |
68 | |
69 | BT_DBG(""); | |
70 | ||
8035ded4 | 71 | list_for_each_entry(s, &bnep_session_list, list) |
d3f4a687 | 72 | if (!compare_ether_addr(dst, s->eh.h_source)) |
1da177e4 | 73 | return s; |
8035ded4 | 74 | |
1da177e4 LT |
75 | return NULL; |
76 | } | |
77 | ||
78 | static void __bnep_link_session(struct bnep_session *s) | |
79 | { | |
8e87d142 | 80 | list_add(&s->list, &bnep_session_list); |
1da177e4 LT |
81 | } |
82 | ||
83 | static void __bnep_unlink_session(struct bnep_session *s) | |
84 | { | |
85 | list_del(&s->list); | |
1da177e4 LT |
86 | } |
87 | ||
88 | static int bnep_send(struct bnep_session *s, void *data, size_t len) | |
89 | { | |
90 | struct socket *sock = s->sock; | |
91 | struct kvec iv = { data, len }; | |
92 | ||
93 | return kernel_sendmsg(sock, &s->msg, &iv, 1, len); | |
94 | } | |
95 | ||
96 | static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp) | |
97 | { | |
98 | struct bnep_control_rsp rsp; | |
99 | rsp.type = BNEP_CONTROL; | |
100 | rsp.ctrl = ctrl; | |
101 | rsp.resp = htons(resp); | |
102 | return bnep_send(s, &rsp, sizeof(rsp)); | |
103 | } | |
104 | ||
105 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
106 | static inline void bnep_set_default_proto_filter(struct bnep_session *s) | |
107 | { | |
108 | /* (IPv4, ARP) */ | |
e41d2169 AV |
109 | s->proto_filter[0].start = ETH_P_IP; |
110 | s->proto_filter[0].end = ETH_P_ARP; | |
1da177e4 | 111 | /* (RARP, AppleTalk) */ |
e41d2169 AV |
112 | s->proto_filter[1].start = ETH_P_RARP; |
113 | s->proto_filter[1].end = ETH_P_AARP; | |
1da177e4 | 114 | /* (IPX, IPv6) */ |
e41d2169 AV |
115 | s->proto_filter[2].start = ETH_P_IPX; |
116 | s->proto_filter[2].end = ETH_P_IPV6; | |
1da177e4 LT |
117 | } |
118 | #endif | |
119 | ||
1bc5d448 | 120 | static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len) |
1da177e4 LT |
121 | { |
122 | int n; | |
123 | ||
124 | if (len < 2) | |
125 | return -EILSEQ; | |
126 | ||
83985319 | 127 | n = get_unaligned_be16(data); |
3aad75a1 SJ |
128 | data++; |
129 | len -= 2; | |
1da177e4 LT |
130 | |
131 | if (len < n) | |
132 | return -EILSEQ; | |
133 | ||
134 | BT_DBG("filter len %d", n); | |
135 | ||
136 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
137 | n /= 4; | |
138 | if (n <= BNEP_MAX_PROTO_FILTERS) { | |
139 | struct bnep_proto_filter *f = s->proto_filter; | |
140 | int i; | |
141 | ||
142 | for (i = 0; i < n; i++) { | |
83985319 HH |
143 | f[i].start = get_unaligned_be16(data++); |
144 | f[i].end = get_unaligned_be16(data++); | |
1da177e4 LT |
145 | |
146 | BT_DBG("proto filter start %d end %d", | |
147 | f[i].start, f[i].end); | |
148 | } | |
149 | ||
150 | if (i < BNEP_MAX_PROTO_FILTERS) | |
151 | memset(f + i, 0, sizeof(*f)); | |
152 | ||
153 | if (n == 0) | |
154 | bnep_set_default_proto_filter(s); | |
155 | ||
156 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS); | |
157 | } else { | |
158 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED); | |
159 | } | |
160 | #else | |
161 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
162 | #endif | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) | |
167 | { | |
168 | int n; | |
169 | ||
170 | if (len < 2) | |
171 | return -EILSEQ; | |
172 | ||
83985319 | 173 | n = get_unaligned_be16(data); |
3aad75a1 SJ |
174 | data += 2; |
175 | len -= 2; | |
1da177e4 LT |
176 | |
177 | if (len < n) | |
178 | return -EILSEQ; | |
179 | ||
180 | BT_DBG("filter len %d", n); | |
181 | ||
182 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
183 | n /= (ETH_ALEN * 2); | |
184 | ||
185 | if (n > 0) { | |
a3d9bd4c SJ |
186 | int i; |
187 | ||
1da177e4 LT |
188 | s->mc_filter = 0; |
189 | ||
190 | /* Always send broadcast */ | |
191 | set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter); | |
192 | ||
193 | /* Add address ranges to the multicast hash */ | |
194 | for (; n > 0; n--) { | |
195 | u8 a1[6], *a2; | |
196 | ||
3aad75a1 SJ |
197 | memcpy(a1, data, ETH_ALEN); |
198 | data += ETH_ALEN; | |
199 | a2 = data; | |
200 | data += ETH_ALEN; | |
8e87d142 | 201 | |
1da177e4 LT |
202 | BT_DBG("mc filter %s -> %s", |
203 | batostr((void *) a1), batostr((void *) a2)); | |
204 | ||
1da177e4 LT |
205 | /* Iterate from a1 to a2 */ |
206 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
207 | while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) { | |
a3d9bd4c SJ |
208 | /* Increment a1 */ |
209 | i = 5; | |
210 | while (i >= 0 && ++a1[i--] == 0) | |
211 | ; | |
212 | ||
1da177e4 LT |
213 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); |
214 | } | |
215 | } | |
216 | } | |
217 | ||
218 | BT_DBG("mc filter hash 0x%llx", s->mc_filter); | |
219 | ||
220 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS); | |
221 | #else | |
222 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
223 | #endif | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static int bnep_rx_control(struct bnep_session *s, void *data, int len) | |
228 | { | |
229 | u8 cmd = *(u8 *)data; | |
230 | int err = 0; | |
231 | ||
3aad75a1 SJ |
232 | data++; |
233 | len--; | |
1da177e4 LT |
234 | |
235 | switch (cmd) { | |
236 | case BNEP_CMD_NOT_UNDERSTOOD: | |
1da177e4 LT |
237 | case BNEP_SETUP_CONN_RSP: |
238 | case BNEP_FILTER_NET_TYPE_RSP: | |
239 | case BNEP_FILTER_MULTI_ADDR_RSP: | |
240 | /* Ignore these for now */ | |
241 | break; | |
242 | ||
243 | case BNEP_FILTER_NET_TYPE_SET: | |
244 | err = bnep_ctrl_set_netfilter(s, data, len); | |
245 | break; | |
246 | ||
247 | case BNEP_FILTER_MULTI_ADDR_SET: | |
248 | err = bnep_ctrl_set_mcfilter(s, data, len); | |
249 | break; | |
250 | ||
cde9f807 VK |
251 | case BNEP_SETUP_CONN_REQ: |
252 | err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP, BNEP_CONN_NOT_ALLOWED); | |
253 | break; | |
254 | ||
1da177e4 LT |
255 | default: { |
256 | u8 pkt[3]; | |
257 | pkt[0] = BNEP_CONTROL; | |
258 | pkt[1] = BNEP_CMD_NOT_UNDERSTOOD; | |
259 | pkt[2] = cmd; | |
260 | bnep_send(s, pkt, sizeof(pkt)); | |
261 | } | |
262 | break; | |
263 | } | |
264 | ||
265 | return err; | |
266 | } | |
267 | ||
268 | static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb) | |
269 | { | |
270 | struct bnep_ext_hdr *h; | |
271 | int err = 0; | |
272 | ||
273 | do { | |
274 | h = (void *) skb->data; | |
275 | if (!skb_pull(skb, sizeof(*h))) { | |
276 | err = -EILSEQ; | |
277 | break; | |
278 | } | |
279 | ||
280 | BT_DBG("type 0x%x len %d", h->type, h->len); | |
8e87d142 | 281 | |
1da177e4 LT |
282 | switch (h->type & BNEP_TYPE_MASK) { |
283 | case BNEP_EXT_CONTROL: | |
284 | bnep_rx_control(s, skb->data, skb->len); | |
285 | break; | |
286 | ||
287 | default: | |
288 | /* Unknown extension, skip it. */ | |
289 | break; | |
290 | } | |
291 | ||
292 | if (!skb_pull(skb, h->len)) { | |
293 | err = -EILSEQ; | |
294 | break; | |
295 | } | |
296 | } while (!err && (h->type & BNEP_EXT_HEADER)); | |
8e87d142 | 297 | |
1da177e4 LT |
298 | return err; |
299 | } | |
300 | ||
301 | static u8 __bnep_rx_hlen[] = { | |
302 | ETH_HLEN, /* BNEP_GENERAL */ | |
303 | 0, /* BNEP_CONTROL */ | |
304 | 2, /* BNEP_COMPRESSED */ | |
305 | ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */ | |
306 | ETH_ALEN + 2 /* BNEP_COMPRESSED_DST_ONLY */ | |
307 | }; | |
1da177e4 LT |
308 | |
309 | static inline int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) | |
310 | { | |
311 | struct net_device *dev = s->dev; | |
312 | struct sk_buff *nskb; | |
313 | u8 type; | |
314 | ||
b4d7f0a4 | 315 | dev->stats.rx_bytes += skb->len; |
1da177e4 | 316 | |
3aad75a1 SJ |
317 | type = *(u8 *) skb->data; |
318 | skb_pull(skb, 1); | |
1da177e4 | 319 | |
a3d9bd4c | 320 | if ((type & BNEP_TYPE_MASK) >= sizeof(__bnep_rx_hlen)) |
1da177e4 | 321 | goto badframe; |
8e87d142 | 322 | |
1da177e4 LT |
323 | if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) { |
324 | bnep_rx_control(s, skb->data, skb->len); | |
325 | kfree_skb(skb); | |
326 | return 0; | |
327 | } | |
328 | ||
459a98ed | 329 | skb_reset_mac_header(skb); |
1da177e4 LT |
330 | |
331 | /* Verify and pull out header */ | |
332 | if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK])) | |
333 | goto badframe; | |
334 | ||
1bc5d448 | 335 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 LT |
336 | |
337 | if (type & BNEP_EXT_HEADER) { | |
338 | if (bnep_rx_extension(s, skb) < 0) | |
339 | goto badframe; | |
340 | } | |
341 | ||
342 | /* Strip 802.1p header */ | |
343 | if (ntohs(s->eh.h_proto) == 0x8100) { | |
344 | if (!skb_pull(skb, 4)) | |
345 | goto badframe; | |
1bc5d448 | 346 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 | 347 | } |
8e87d142 | 348 | |
1da177e4 LT |
349 | /* We have to alloc new skb and copy data here :(. Because original skb |
350 | * may not be modified and because of the alignment requirements. */ | |
351 | nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL); | |
352 | if (!nskb) { | |
b4d7f0a4 | 353 | dev->stats.rx_dropped++; |
1da177e4 LT |
354 | kfree_skb(skb); |
355 | return -ENOMEM; | |
356 | } | |
357 | skb_reserve(nskb, 2); | |
358 | ||
359 | /* Decompress header and construct ether frame */ | |
360 | switch (type & BNEP_TYPE_MASK) { | |
361 | case BNEP_COMPRESSED: | |
362 | memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN); | |
363 | break; | |
8e87d142 | 364 | |
1da177e4 LT |
365 | case BNEP_COMPRESSED_SRC_ONLY: |
366 | memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN); | |
98e399f8 | 367 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN); |
1bc5d448 | 368 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
369 | break; |
370 | ||
371 | case BNEP_COMPRESSED_DST_ONLY: | |
98e399f8 | 372 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), |
3aad75a1 | 373 | ETH_ALEN); |
98e399f8 | 374 | memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source, |
3aad75a1 | 375 | ETH_ALEN + 2); |
1da177e4 LT |
376 | break; |
377 | ||
378 | case BNEP_GENERAL: | |
98e399f8 | 379 | memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb), |
3aad75a1 | 380 | ETH_ALEN * 2); |
1bc5d448 | 381 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
382 | break; |
383 | } | |
384 | ||
d626f62b | 385 | skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len); |
1da177e4 | 386 | kfree_skb(skb); |
8e87d142 | 387 | |
b4d7f0a4 | 388 | dev->stats.rx_packets++; |
1da177e4 LT |
389 | nskb->ip_summed = CHECKSUM_NONE; |
390 | nskb->protocol = eth_type_trans(nskb, dev); | |
391 | netif_rx_ni(nskb); | |
392 | return 0; | |
393 | ||
394 | badframe: | |
b4d7f0a4 | 395 | dev->stats.rx_errors++; |
1da177e4 LT |
396 | kfree_skb(skb); |
397 | return 0; | |
398 | } | |
399 | ||
400 | static u8 __bnep_tx_types[] = { | |
401 | BNEP_GENERAL, | |
402 | BNEP_COMPRESSED_SRC_ONLY, | |
403 | BNEP_COMPRESSED_DST_ONLY, | |
404 | BNEP_COMPRESSED | |
405 | }; | |
406 | ||
407 | static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) | |
408 | { | |
409 | struct ethhdr *eh = (void *) skb->data; | |
410 | struct socket *sock = s->sock; | |
411 | struct kvec iv[3]; | |
412 | int len = 0, il = 0; | |
413 | u8 type = 0; | |
414 | ||
415 | BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type); | |
416 | ||
417 | if (!skb->dev) { | |
418 | /* Control frame sent by us */ | |
419 | goto send; | |
420 | } | |
421 | ||
422 | iv[il++] = (struct kvec) { &type, 1 }; | |
423 | len++; | |
424 | ||
28111eb2 | 425 | if (compress_src && !compare_ether_addr(eh->h_dest, s->eh.h_source)) |
1da177e4 LT |
426 | type |= 0x01; |
427 | ||
28111eb2 | 428 | if (compress_dst && !compare_ether_addr(eh->h_source, s->eh.h_dest)) |
1da177e4 LT |
429 | type |= 0x02; |
430 | ||
431 | if (type) | |
432 | skb_pull(skb, ETH_ALEN * 2); | |
433 | ||
434 | type = __bnep_tx_types[type]; | |
435 | switch (type) { | |
436 | case BNEP_COMPRESSED_SRC_ONLY: | |
437 | iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN }; | |
438 | len += ETH_ALEN; | |
439 | break; | |
8e87d142 | 440 | |
1da177e4 LT |
441 | case BNEP_COMPRESSED_DST_ONLY: |
442 | iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN }; | |
443 | len += ETH_ALEN; | |
444 | break; | |
445 | } | |
446 | ||
447 | send: | |
448 | iv[il++] = (struct kvec) { skb->data, skb->len }; | |
449 | len += skb->len; | |
8e87d142 | 450 | |
1da177e4 LT |
451 | /* FIXME: linearize skb */ |
452 | { | |
453 | len = kernel_sendmsg(sock, &s->msg, iv, il, len); | |
454 | } | |
455 | kfree_skb(skb); | |
456 | ||
457 | if (len > 0) { | |
b4d7f0a4 SH |
458 | s->dev->stats.tx_bytes += len; |
459 | s->dev->stats.tx_packets++; | |
1da177e4 LT |
460 | return 0; |
461 | } | |
462 | ||
463 | return len; | |
464 | } | |
465 | ||
466 | static int bnep_session(void *arg) | |
467 | { | |
468 | struct bnep_session *s = arg; | |
469 | struct net_device *dev = s->dev; | |
470 | struct sock *sk = s->sock->sk; | |
471 | struct sk_buff *skb; | |
472 | wait_queue_t wait; | |
473 | ||
474 | BT_DBG(""); | |
475 | ||
1da177e4 | 476 | set_user_nice(current, -15); |
1da177e4 LT |
477 | |
478 | init_waitqueue_entry(&wait, current); | |
aa395145 | 479 | add_wait_queue(sk_sleep(sk), &wait); |
38d57555 | 480 | while (1) { |
1da177e4 LT |
481 | set_current_state(TASK_INTERRUPTIBLE); |
482 | ||
751c10a5 | 483 | if (atomic_read(&s->terminate)) |
38d57555 | 484 | break; |
3aad75a1 | 485 | /* RX */ |
1da177e4 LT |
486 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { |
487 | skb_orphan(skb); | |
44935720 MM |
488 | if (!skb_linearize(skb)) |
489 | bnep_rx_frame(s, skb); | |
490 | else | |
491 | kfree_skb(skb); | |
1da177e4 LT |
492 | } |
493 | ||
494 | if (sk->sk_state != BT_CONNECTED) | |
495 | break; | |
8e87d142 | 496 | |
3aad75a1 | 497 | /* TX */ |
1da177e4 LT |
498 | while ((skb = skb_dequeue(&sk->sk_write_queue))) |
499 | if (bnep_tx_frame(s, skb)) | |
500 | break; | |
501 | netif_wake_queue(dev); | |
8e87d142 | 502 | |
1da177e4 LT |
503 | schedule(); |
504 | } | |
38d57555 | 505 | __set_current_state(TASK_RUNNING); |
aa395145 | 506 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
507 | |
508 | /* Cleanup session */ | |
509 | down_write(&bnep_session_sem); | |
510 | ||
511 | /* Delete network device */ | |
512 | unregister_netdev(dev); | |
513 | ||
ec8dab36 MH |
514 | /* Wakeup user-space polling for socket errors */ |
515 | s->sock->sk->sk_err = EUNATCH; | |
516 | ||
aa395145 | 517 | wake_up_interruptible(sk_sleep(s->sock->sk)); |
ec8dab36 | 518 | |
1da177e4 LT |
519 | /* Release the socket */ |
520 | fput(s->sock->file); | |
521 | ||
522 | __bnep_unlink_session(s); | |
523 | ||
524 | up_write(&bnep_session_sem); | |
525 | free_netdev(dev); | |
9b338c3d | 526 | module_put_and_exit(0); |
1da177e4 LT |
527 | return 0; |
528 | } | |
529 | ||
0a85b964 MH |
530 | static struct device *bnep_get_device(struct bnep_session *session) |
531 | { | |
532 | bdaddr_t *src = &bt_sk(session->sock->sk)->src; | |
533 | bdaddr_t *dst = &bt_sk(session->sock->sk)->dst; | |
534 | struct hci_dev *hdev; | |
535 | struct hci_conn *conn; | |
536 | ||
537 | hdev = hci_get_route(dst, src); | |
538 | if (!hdev) | |
539 | return NULL; | |
540 | ||
541 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); | |
0a85b964 MH |
542 | |
543 | hci_dev_put(hdev); | |
544 | ||
b2cfcd75 | 545 | return conn ? &conn->dev : NULL; |
0a85b964 MH |
546 | } |
547 | ||
384912ed MH |
548 | static struct device_type bnep_type = { |
549 | .name = "bluetooth", | |
550 | }; | |
551 | ||
1da177e4 LT |
552 | int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) |
553 | { | |
554 | struct net_device *dev; | |
555 | struct bnep_session *s, *ss; | |
556 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
557 | int err; | |
558 | ||
559 | BT_DBG(""); | |
560 | ||
561 | baswap((void *) dst, &bt_sk(sock->sk)->dst); | |
562 | baswap((void *) src, &bt_sk(sock->sk)->src); | |
563 | ||
564 | /* session struct allocated as private part of net_device */ | |
565 | dev = alloc_netdev(sizeof(struct bnep_session), | |
3aad75a1 SJ |
566 | (*req->device) ? req->device : "bnep%d", |
567 | bnep_net_setup); | |
67b52e55 TK |
568 | if (!dev) |
569 | return -ENOMEM; | |
1da177e4 | 570 | |
1da177e4 LT |
571 | down_write(&bnep_session_sem); |
572 | ||
573 | ss = __bnep_get_session(dst); | |
574 | if (ss && ss->state == BT_CONNECTED) { | |
575 | err = -EEXIST; | |
576 | goto failed; | |
577 | } | |
578 | ||
524ad0a7 | 579 | s = netdev_priv(dev); |
1da177e4 LT |
580 | |
581 | /* This is rx header therefore addresses are swapped. | |
3aad75a1 | 582 | * ie. eh.h_dest is our local address. */ |
1da177e4 LT |
583 | memcpy(s->eh.h_dest, &src, ETH_ALEN); |
584 | memcpy(s->eh.h_source, &dst, ETH_ALEN); | |
585 | memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN); | |
586 | ||
0a85b964 | 587 | s->dev = dev; |
1da177e4 LT |
588 | s->sock = sock; |
589 | s->role = req->role; | |
590 | s->state = BT_CONNECTED; | |
8e87d142 | 591 | |
1da177e4 LT |
592 | s->msg.msg_flags = MSG_NOSIGNAL; |
593 | ||
594 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
595 | /* Set default mc filter */ | |
596 | set_bit(bnep_mc_hash(dev->broadcast), (ulong *) &s->mc_filter); | |
597 | #endif | |
598 | ||
599 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
600 | /* Set default protocol filter */ | |
601 | bnep_set_default_proto_filter(s); | |
602 | #endif | |
603 | ||
0a85b964 | 604 | SET_NETDEV_DEV(dev, bnep_get_device(s)); |
384912ed | 605 | SET_NETDEV_DEVTYPE(dev, &bnep_type); |
0a85b964 | 606 | |
1da177e4 | 607 | err = register_netdev(dev); |
3aad75a1 | 608 | if (err) |
1da177e4 | 609 | goto failed; |
1da177e4 LT |
610 | |
611 | __bnep_link_session(s); | |
8e87d142 | 612 | |
9b338c3d | 613 | __module_get(THIS_MODULE); |
f4d7cd4a SJ |
614 | s->task = kthread_run(bnep_session, s, "kbnepd %s", dev->name); |
615 | if (IS_ERR(s->task)) { | |
1da177e4 | 616 | /* Session thread start failed, gotta cleanup. */ |
9b338c3d | 617 | module_put(THIS_MODULE); |
1da177e4 LT |
618 | unregister_netdev(dev); |
619 | __bnep_unlink_session(s); | |
f4d7cd4a | 620 | err = PTR_ERR(s->task); |
1da177e4 LT |
621 | goto failed; |
622 | } | |
623 | ||
624 | up_write(&bnep_session_sem); | |
625 | strcpy(req->device, dev->name); | |
626 | return 0; | |
627 | ||
628 | failed: | |
629 | up_write(&bnep_session_sem); | |
630 | free_netdev(dev); | |
631 | return err; | |
632 | } | |
633 | ||
634 | int bnep_del_connection(struct bnep_conndel_req *req) | |
635 | { | |
636 | struct bnep_session *s; | |
637 | int err = 0; | |
638 | ||
639 | BT_DBG(""); | |
640 | ||
641 | down_read(&bnep_session_sem); | |
642 | ||
643 | s = __bnep_get_session(req->dst); | |
751c10a5 PH |
644 | if (s) { |
645 | atomic_inc(&s->terminate); | |
646 | wake_up_process(s->task); | |
647 | } else | |
1da177e4 LT |
648 | err = -ENOENT; |
649 | ||
650 | up_read(&bnep_session_sem); | |
651 | return err; | |
652 | } | |
653 | ||
654 | static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s) | |
655 | { | |
5520d20f | 656 | memset(ci, 0, sizeof(*ci)); |
1da177e4 LT |
657 | memcpy(ci->dst, s->eh.h_source, ETH_ALEN); |
658 | strcpy(ci->device, s->dev->name); | |
659 | ci->flags = s->flags; | |
660 | ci->state = s->state; | |
661 | ci->role = s->role; | |
662 | } | |
663 | ||
664 | int bnep_get_connlist(struct bnep_connlist_req *req) | |
665 | { | |
8035ded4 | 666 | struct bnep_session *s; |
1da177e4 LT |
667 | int err = 0, n = 0; |
668 | ||
669 | down_read(&bnep_session_sem); | |
670 | ||
8035ded4 | 671 | list_for_each_entry(s, &bnep_session_list, list) { |
1da177e4 LT |
672 | struct bnep_conninfo ci; |
673 | ||
1da177e4 | 674 | __bnep_copy_ci(&ci, s); |
8e87d142 | 675 | |
1da177e4 LT |
676 | if (copy_to_user(req->ci, &ci, sizeof(ci))) { |
677 | err = -EFAULT; | |
678 | break; | |
679 | } | |
680 | ||
681 | if (++n >= req->cnum) | |
682 | break; | |
683 | ||
684 | req->ci++; | |
685 | } | |
686 | req->cnum = n; | |
687 | ||
688 | up_read(&bnep_session_sem); | |
689 | return err; | |
690 | } | |
691 | ||
692 | int bnep_get_conninfo(struct bnep_conninfo *ci) | |
693 | { | |
694 | struct bnep_session *s; | |
695 | int err = 0; | |
696 | ||
697 | down_read(&bnep_session_sem); | |
698 | ||
699 | s = __bnep_get_session(ci->dst); | |
700 | if (s) | |
701 | __bnep_copy_ci(ci, s); | |
702 | else | |
703 | err = -ENOENT; | |
704 | ||
705 | up_read(&bnep_session_sem); | |
706 | return err; | |
707 | } | |
708 | ||
709 | static int __init bnep_init(void) | |
8e87d142 | 710 | { |
1da177e4 LT |
711 | char flt[50] = ""; |
712 | ||
1da177e4 LT |
713 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER |
714 | strcat(flt, "protocol "); | |
715 | #endif | |
716 | ||
717 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
718 | strcat(flt, "multicast"); | |
719 | #endif | |
720 | ||
721 | BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION); | |
722 | if (flt[0]) | |
723 | BT_INFO("BNEP filters: %s", flt); | |
724 | ||
725 | bnep_sock_init(); | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static void __exit bnep_exit(void) | |
730 | { | |
731 | bnep_sock_cleanup(); | |
732 | } | |
733 | ||
734 | module_init(bnep_init); | |
735 | module_exit(bnep_exit); | |
736 | ||
28111eb2 MH |
737 | module_param(compress_src, bool, 0644); |
738 | MODULE_PARM_DESC(compress_src, "Compress sources headers"); | |
739 | ||
740 | module_param(compress_dst, bool, 0644); | |
741 | MODULE_PARM_DESC(compress_dst, "Compress destination headers"); | |
742 | ||
63fbd24e | 743 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
744 | MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION); |
745 | MODULE_VERSION(VERSION); | |
746 | MODULE_LICENSE("GPL"); | |
747 | MODULE_ALIAS("bt-proto-4"); |