]>
Commit | Line | Data |
---|---|---|
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 LT |
37 | #include <linux/net.h> |
38 | #include <net/sock.h> | |
39 | ||
40 | #include <linux/socket.h> | |
41 | #include <linux/file.h> | |
42 | ||
43 | #include <linux/netdevice.h> | |
44 | #include <linux/etherdevice.h> | |
45 | #include <linux/skbuff.h> | |
46 | ||
47 | #include <asm/unaligned.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
0a85b964 | 50 | #include <net/bluetooth/hci_core.h> |
1da177e4 LT |
51 | #include <net/bluetooth/l2cap.h> |
52 | ||
53 | #include "bnep.h" | |
54 | ||
55 | #ifndef CONFIG_BT_BNEP_DEBUG | |
56 | #undef BT_DBG | |
57 | #define BT_DBG(D...) | |
58 | #endif | |
59 | ||
28111eb2 MH |
60 | #define VERSION "1.3" |
61 | ||
62 | static int compress_src = 1; | |
63 | static int compress_dst = 1; | |
1da177e4 LT |
64 | |
65 | static LIST_HEAD(bnep_session_list); | |
66 | static DECLARE_RWSEM(bnep_session_sem); | |
67 | ||
68 | static struct bnep_session *__bnep_get_session(u8 *dst) | |
69 | { | |
70 | struct bnep_session *s; | |
71 | struct list_head *p; | |
72 | ||
73 | BT_DBG(""); | |
74 | ||
75 | list_for_each(p, &bnep_session_list) { | |
8e87d142 | 76 | s = list_entry(p, struct bnep_session, list); |
d3f4a687 | 77 | if (!compare_ether_addr(dst, s->eh.h_source)) |
1da177e4 LT |
78 | return s; |
79 | } | |
80 | return NULL; | |
81 | } | |
82 | ||
83 | static void __bnep_link_session(struct bnep_session *s) | |
84 | { | |
85 | /* It's safe to call __module_get() here because sessions are added | |
86 | by the socket layer which has to hold the refference to this module. | |
87 | */ | |
88 | __module_get(THIS_MODULE); | |
8e87d142 | 89 | list_add(&s->list, &bnep_session_list); |
1da177e4 LT |
90 | } |
91 | ||
92 | static void __bnep_unlink_session(struct bnep_session *s) | |
93 | { | |
94 | list_del(&s->list); | |
95 | module_put(THIS_MODULE); | |
96 | } | |
97 | ||
98 | static int bnep_send(struct bnep_session *s, void *data, size_t len) | |
99 | { | |
100 | struct socket *sock = s->sock; | |
101 | struct kvec iv = { data, len }; | |
102 | ||
103 | return kernel_sendmsg(sock, &s->msg, &iv, 1, len); | |
104 | } | |
105 | ||
106 | static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp) | |
107 | { | |
108 | struct bnep_control_rsp rsp; | |
109 | rsp.type = BNEP_CONTROL; | |
110 | rsp.ctrl = ctrl; | |
111 | rsp.resp = htons(resp); | |
112 | return bnep_send(s, &rsp, sizeof(rsp)); | |
113 | } | |
114 | ||
115 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
116 | static inline void bnep_set_default_proto_filter(struct bnep_session *s) | |
117 | { | |
118 | /* (IPv4, ARP) */ | |
e41d2169 AV |
119 | s->proto_filter[0].start = ETH_P_IP; |
120 | s->proto_filter[0].end = ETH_P_ARP; | |
1da177e4 | 121 | /* (RARP, AppleTalk) */ |
e41d2169 AV |
122 | s->proto_filter[1].start = ETH_P_RARP; |
123 | s->proto_filter[1].end = ETH_P_AARP; | |
1da177e4 | 124 | /* (IPX, IPv6) */ |
e41d2169 AV |
125 | s->proto_filter[2].start = ETH_P_IPX; |
126 | s->proto_filter[2].end = ETH_P_IPV6; | |
1da177e4 LT |
127 | } |
128 | #endif | |
129 | ||
1bc5d448 | 130 | static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len) |
1da177e4 LT |
131 | { |
132 | int n; | |
133 | ||
134 | if (len < 2) | |
135 | return -EILSEQ; | |
136 | ||
83985319 | 137 | n = get_unaligned_be16(data); |
1da177e4 LT |
138 | data++; len -= 2; |
139 | ||
140 | if (len < n) | |
141 | return -EILSEQ; | |
142 | ||
143 | BT_DBG("filter len %d", n); | |
144 | ||
145 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
146 | n /= 4; | |
147 | if (n <= BNEP_MAX_PROTO_FILTERS) { | |
148 | struct bnep_proto_filter *f = s->proto_filter; | |
149 | int i; | |
150 | ||
151 | for (i = 0; i < n; i++) { | |
83985319 HH |
152 | f[i].start = get_unaligned_be16(data++); |
153 | f[i].end = get_unaligned_be16(data++); | |
1da177e4 LT |
154 | |
155 | BT_DBG("proto filter start %d end %d", | |
156 | f[i].start, f[i].end); | |
157 | } | |
158 | ||
159 | if (i < BNEP_MAX_PROTO_FILTERS) | |
160 | memset(f + i, 0, sizeof(*f)); | |
161 | ||
162 | if (n == 0) | |
163 | bnep_set_default_proto_filter(s); | |
164 | ||
165 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS); | |
166 | } else { | |
167 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED); | |
168 | } | |
169 | #else | |
170 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
171 | #endif | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) | |
176 | { | |
177 | int n; | |
178 | ||
179 | if (len < 2) | |
180 | return -EILSEQ; | |
181 | ||
83985319 | 182 | n = get_unaligned_be16(data); |
1da177e4 LT |
183 | data += 2; len -= 2; |
184 | ||
185 | if (len < n) | |
186 | return -EILSEQ; | |
187 | ||
188 | BT_DBG("filter len %d", n); | |
189 | ||
190 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
191 | n /= (ETH_ALEN * 2); | |
192 | ||
193 | if (n > 0) { | |
194 | s->mc_filter = 0; | |
195 | ||
196 | /* Always send broadcast */ | |
197 | set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter); | |
198 | ||
199 | /* Add address ranges to the multicast hash */ | |
200 | for (; n > 0; n--) { | |
201 | u8 a1[6], *a2; | |
202 | ||
203 | memcpy(a1, data, ETH_ALEN); data += ETH_ALEN; | |
204 | a2 = data; data += ETH_ALEN; | |
8e87d142 | 205 | |
1da177e4 LT |
206 | BT_DBG("mc filter %s -> %s", |
207 | batostr((void *) a1), batostr((void *) a2)); | |
208 | ||
209 | #define INCA(a) { int i = 5; while (i >=0 && ++a[i--] == 0); } | |
210 | ||
211 | /* Iterate from a1 to a2 */ | |
212 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
213 | while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) { | |
214 | INCA(a1); | |
215 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | BT_DBG("mc filter hash 0x%llx", s->mc_filter); | |
221 | ||
222 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS); | |
223 | #else | |
224 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
225 | #endif | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int bnep_rx_control(struct bnep_session *s, void *data, int len) | |
230 | { | |
231 | u8 cmd = *(u8 *)data; | |
232 | int err = 0; | |
233 | ||
234 | data++; len--; | |
235 | ||
236 | switch (cmd) { | |
237 | case BNEP_CMD_NOT_UNDERSTOOD: | |
238 | case BNEP_SETUP_CONN_REQ: | |
239 | case BNEP_SETUP_CONN_RSP: | |
240 | case BNEP_FILTER_NET_TYPE_RSP: | |
241 | case BNEP_FILTER_MULTI_ADDR_RSP: | |
242 | /* Ignore these for now */ | |
243 | break; | |
244 | ||
245 | case BNEP_FILTER_NET_TYPE_SET: | |
246 | err = bnep_ctrl_set_netfilter(s, data, len); | |
247 | break; | |
248 | ||
249 | case BNEP_FILTER_MULTI_ADDR_SET: | |
250 | err = bnep_ctrl_set_mcfilter(s, data, len); | |
251 | break; | |
252 | ||
253 | default: { | |
254 | u8 pkt[3]; | |
255 | pkt[0] = BNEP_CONTROL; | |
256 | pkt[1] = BNEP_CMD_NOT_UNDERSTOOD; | |
257 | pkt[2] = cmd; | |
258 | bnep_send(s, pkt, sizeof(pkt)); | |
259 | } | |
260 | break; | |
261 | } | |
262 | ||
263 | return err; | |
264 | } | |
265 | ||
266 | static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb) | |
267 | { | |
268 | struct bnep_ext_hdr *h; | |
269 | int err = 0; | |
270 | ||
271 | do { | |
272 | h = (void *) skb->data; | |
273 | if (!skb_pull(skb, sizeof(*h))) { | |
274 | err = -EILSEQ; | |
275 | break; | |
276 | } | |
277 | ||
278 | BT_DBG("type 0x%x len %d", h->type, h->len); | |
8e87d142 | 279 | |
1da177e4 LT |
280 | switch (h->type & BNEP_TYPE_MASK) { |
281 | case BNEP_EXT_CONTROL: | |
282 | bnep_rx_control(s, skb->data, skb->len); | |
283 | break; | |
284 | ||
285 | default: | |
286 | /* Unknown extension, skip it. */ | |
287 | break; | |
288 | } | |
289 | ||
290 | if (!skb_pull(skb, h->len)) { | |
291 | err = -EILSEQ; | |
292 | break; | |
293 | } | |
294 | } while (!err && (h->type & BNEP_EXT_HEADER)); | |
8e87d142 | 295 | |
1da177e4 LT |
296 | return err; |
297 | } | |
298 | ||
299 | static u8 __bnep_rx_hlen[] = { | |
300 | ETH_HLEN, /* BNEP_GENERAL */ | |
301 | 0, /* BNEP_CONTROL */ | |
302 | 2, /* BNEP_COMPRESSED */ | |
303 | ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */ | |
304 | ETH_ALEN + 2 /* BNEP_COMPRESSED_DST_ONLY */ | |
305 | }; | |
306 | #define BNEP_RX_TYPES (sizeof(__bnep_rx_hlen) - 1) | |
307 | ||
308 | static inline int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) | |
309 | { | |
310 | struct net_device *dev = s->dev; | |
311 | struct sk_buff *nskb; | |
312 | u8 type; | |
313 | ||
314 | dev->last_rx = jiffies; | |
315 | s->stats.rx_bytes += skb->len; | |
316 | ||
317 | type = *(u8 *) skb->data; skb_pull(skb, 1); | |
318 | ||
319 | if ((type & BNEP_TYPE_MASK) > BNEP_RX_TYPES) | |
320 | goto badframe; | |
8e87d142 | 321 | |
1da177e4 LT |
322 | if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) { |
323 | bnep_rx_control(s, skb->data, skb->len); | |
324 | kfree_skb(skb); | |
325 | return 0; | |
326 | } | |
327 | ||
459a98ed | 328 | skb_reset_mac_header(skb); |
1da177e4 LT |
329 | |
330 | /* Verify and pull out header */ | |
331 | if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK])) | |
332 | goto badframe; | |
333 | ||
1bc5d448 | 334 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 LT |
335 | |
336 | if (type & BNEP_EXT_HEADER) { | |
337 | if (bnep_rx_extension(s, skb) < 0) | |
338 | goto badframe; | |
339 | } | |
340 | ||
341 | /* Strip 802.1p header */ | |
342 | if (ntohs(s->eh.h_proto) == 0x8100) { | |
343 | if (!skb_pull(skb, 4)) | |
344 | goto badframe; | |
1bc5d448 | 345 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 | 346 | } |
8e87d142 | 347 | |
1da177e4 LT |
348 | /* We have to alloc new skb and copy data here :(. Because original skb |
349 | * may not be modified and because of the alignment requirements. */ | |
350 | nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL); | |
351 | if (!nskb) { | |
352 | s->stats.rx_dropped++; | |
353 | kfree_skb(skb); | |
354 | return -ENOMEM; | |
355 | } | |
356 | skb_reserve(nskb, 2); | |
357 | ||
358 | /* Decompress header and construct ether frame */ | |
359 | switch (type & BNEP_TYPE_MASK) { | |
360 | case BNEP_COMPRESSED: | |
361 | memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN); | |
362 | break; | |
8e87d142 | 363 | |
1da177e4 LT |
364 | case BNEP_COMPRESSED_SRC_ONLY: |
365 | memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN); | |
98e399f8 | 366 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN); |
1bc5d448 | 367 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
368 | break; |
369 | ||
370 | case BNEP_COMPRESSED_DST_ONLY: | |
98e399f8 ACM |
371 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), |
372 | ETH_ALEN); | |
373 | memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source, | |
374 | ETH_ALEN + 2); | |
1da177e4 LT |
375 | break; |
376 | ||
377 | case BNEP_GENERAL: | |
98e399f8 ACM |
378 | memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb), |
379 | ETH_ALEN * 2); | |
1bc5d448 | 380 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
381 | break; |
382 | } | |
383 | ||
d626f62b | 384 | skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len); |
1da177e4 | 385 | kfree_skb(skb); |
8e87d142 | 386 | |
1da177e4 | 387 | s->stats.rx_packets++; |
1da177e4 LT |
388 | nskb->ip_summed = CHECKSUM_NONE; |
389 | nskb->protocol = eth_type_trans(nskb, dev); | |
390 | netif_rx_ni(nskb); | |
391 | return 0; | |
392 | ||
393 | badframe: | |
394 | s->stats.rx_errors++; | |
395 | kfree_skb(skb); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static u8 __bnep_tx_types[] = { | |
400 | BNEP_GENERAL, | |
401 | BNEP_COMPRESSED_SRC_ONLY, | |
402 | BNEP_COMPRESSED_DST_ONLY, | |
403 | BNEP_COMPRESSED | |
404 | }; | |
405 | ||
406 | static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) | |
407 | { | |
408 | struct ethhdr *eh = (void *) skb->data; | |
409 | struct socket *sock = s->sock; | |
410 | struct kvec iv[3]; | |
411 | int len = 0, il = 0; | |
412 | u8 type = 0; | |
413 | ||
414 | BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type); | |
415 | ||
416 | if (!skb->dev) { | |
417 | /* Control frame sent by us */ | |
418 | goto send; | |
419 | } | |
420 | ||
421 | iv[il++] = (struct kvec) { &type, 1 }; | |
422 | len++; | |
423 | ||
28111eb2 | 424 | if (compress_src && !compare_ether_addr(eh->h_dest, s->eh.h_source)) |
1da177e4 LT |
425 | type |= 0x01; |
426 | ||
28111eb2 | 427 | if (compress_dst && !compare_ether_addr(eh->h_source, s->eh.h_dest)) |
1da177e4 LT |
428 | type |= 0x02; |
429 | ||
430 | if (type) | |
431 | skb_pull(skb, ETH_ALEN * 2); | |
432 | ||
433 | type = __bnep_tx_types[type]; | |
434 | switch (type) { | |
435 | case BNEP_COMPRESSED_SRC_ONLY: | |
436 | iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN }; | |
437 | len += ETH_ALEN; | |
438 | break; | |
8e87d142 | 439 | |
1da177e4 LT |
440 | case BNEP_COMPRESSED_DST_ONLY: |
441 | iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN }; | |
442 | len += ETH_ALEN; | |
443 | break; | |
444 | } | |
445 | ||
446 | send: | |
447 | iv[il++] = (struct kvec) { skb->data, skb->len }; | |
448 | len += skb->len; | |
8e87d142 | 449 | |
1da177e4 LT |
450 | /* FIXME: linearize skb */ |
451 | { | |
452 | len = kernel_sendmsg(sock, &s->msg, iv, il, len); | |
453 | } | |
454 | kfree_skb(skb); | |
455 | ||
456 | if (len > 0) { | |
457 | s->stats.tx_bytes += len; | |
458 | s->stats.tx_packets++; | |
459 | return 0; | |
460 | } | |
461 | ||
462 | return len; | |
463 | } | |
464 | ||
465 | static int bnep_session(void *arg) | |
466 | { | |
467 | struct bnep_session *s = arg; | |
468 | struct net_device *dev = s->dev; | |
469 | struct sock *sk = s->sock->sk; | |
470 | struct sk_buff *skb; | |
471 | wait_queue_t wait; | |
472 | ||
473 | BT_DBG(""); | |
474 | ||
8e87d142 | 475 | daemonize("kbnepd %s", dev->name); |
1da177e4 | 476 | set_user_nice(current, -15); |
1da177e4 LT |
477 | |
478 | init_waitqueue_entry(&wait, current); | |
479 | add_wait_queue(sk->sk_sleep, &wait); | |
480 | while (!atomic_read(&s->killed)) { | |
481 | set_current_state(TASK_INTERRUPTIBLE); | |
482 | ||
483 | // RX | |
484 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
485 | skb_orphan(skb); | |
486 | bnep_rx_frame(s, skb); | |
487 | } | |
488 | ||
489 | if (sk->sk_state != BT_CONNECTED) | |
490 | break; | |
8e87d142 | 491 | |
1da177e4 LT |
492 | // TX |
493 | while ((skb = skb_dequeue(&sk->sk_write_queue))) | |
494 | if (bnep_tx_frame(s, skb)) | |
495 | break; | |
496 | netif_wake_queue(dev); | |
8e87d142 | 497 | |
1da177e4 LT |
498 | schedule(); |
499 | } | |
500 | set_current_state(TASK_RUNNING); | |
501 | remove_wait_queue(sk->sk_sleep, &wait); | |
502 | ||
503 | /* Cleanup session */ | |
504 | down_write(&bnep_session_sem); | |
505 | ||
506 | /* Delete network device */ | |
507 | unregister_netdev(dev); | |
508 | ||
ec8dab36 MH |
509 | /* Wakeup user-space polling for socket errors */ |
510 | s->sock->sk->sk_err = EUNATCH; | |
511 | ||
512 | wake_up_interruptible(s->sock->sk->sk_sleep); | |
513 | ||
1da177e4 LT |
514 | /* Release the socket */ |
515 | fput(s->sock->file); | |
516 | ||
517 | __bnep_unlink_session(s); | |
518 | ||
519 | up_write(&bnep_session_sem); | |
520 | free_netdev(dev); | |
521 | return 0; | |
522 | } | |
523 | ||
0a85b964 MH |
524 | static struct device *bnep_get_device(struct bnep_session *session) |
525 | { | |
526 | bdaddr_t *src = &bt_sk(session->sock->sk)->src; | |
527 | bdaddr_t *dst = &bt_sk(session->sock->sk)->dst; | |
528 | struct hci_dev *hdev; | |
529 | struct hci_conn *conn; | |
530 | ||
531 | hdev = hci_get_route(dst, src); | |
532 | if (!hdev) | |
533 | return NULL; | |
534 | ||
535 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); | |
0a85b964 MH |
536 | |
537 | hci_dev_put(hdev); | |
538 | ||
b2cfcd75 | 539 | return conn ? &conn->dev : NULL; |
0a85b964 MH |
540 | } |
541 | ||
1da177e4 LT |
542 | int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) |
543 | { | |
544 | struct net_device *dev; | |
545 | struct bnep_session *s, *ss; | |
546 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
547 | int err; | |
548 | ||
549 | BT_DBG(""); | |
550 | ||
551 | baswap((void *) dst, &bt_sk(sock->sk)->dst); | |
552 | baswap((void *) src, &bt_sk(sock->sk)->src); | |
553 | ||
554 | /* session struct allocated as private part of net_device */ | |
555 | dev = alloc_netdev(sizeof(struct bnep_session), | |
556 | (*req->device) ? req->device : "bnep%d", | |
557 | bnep_net_setup); | |
67b52e55 TK |
558 | if (!dev) |
559 | return -ENOMEM; | |
1da177e4 | 560 | |
1da177e4 LT |
561 | down_write(&bnep_session_sem); |
562 | ||
563 | ss = __bnep_get_session(dst); | |
564 | if (ss && ss->state == BT_CONNECTED) { | |
565 | err = -EEXIST; | |
566 | goto failed; | |
567 | } | |
568 | ||
569 | s = dev->priv; | |
570 | ||
571 | /* This is rx header therefore addresses are swapped. | |
572 | * ie eh.h_dest is our local address. */ | |
573 | memcpy(s->eh.h_dest, &src, ETH_ALEN); | |
574 | memcpy(s->eh.h_source, &dst, ETH_ALEN); | |
575 | memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN); | |
576 | ||
0a85b964 | 577 | s->dev = dev; |
1da177e4 LT |
578 | s->sock = sock; |
579 | s->role = req->role; | |
580 | s->state = BT_CONNECTED; | |
8e87d142 | 581 | |
1da177e4 LT |
582 | s->msg.msg_flags = MSG_NOSIGNAL; |
583 | ||
584 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
585 | /* Set default mc filter */ | |
586 | set_bit(bnep_mc_hash(dev->broadcast), (ulong *) &s->mc_filter); | |
587 | #endif | |
588 | ||
589 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
590 | /* Set default protocol filter */ | |
591 | bnep_set_default_proto_filter(s); | |
592 | #endif | |
593 | ||
0a85b964 MH |
594 | SET_NETDEV_DEV(dev, bnep_get_device(s)); |
595 | ||
1da177e4 LT |
596 | err = register_netdev(dev); |
597 | if (err) { | |
598 | goto failed; | |
599 | } | |
600 | ||
601 | __bnep_link_session(s); | |
8e87d142 | 602 | |
1da177e4 LT |
603 | err = kernel_thread(bnep_session, s, CLONE_KERNEL); |
604 | if (err < 0) { | |
605 | /* Session thread start failed, gotta cleanup. */ | |
606 | unregister_netdev(dev); | |
607 | __bnep_unlink_session(s); | |
608 | goto failed; | |
609 | } | |
610 | ||
611 | up_write(&bnep_session_sem); | |
612 | strcpy(req->device, dev->name); | |
613 | return 0; | |
614 | ||
615 | failed: | |
616 | up_write(&bnep_session_sem); | |
617 | free_netdev(dev); | |
618 | return err; | |
619 | } | |
620 | ||
621 | int bnep_del_connection(struct bnep_conndel_req *req) | |
622 | { | |
623 | struct bnep_session *s; | |
624 | int err = 0; | |
625 | ||
626 | BT_DBG(""); | |
627 | ||
628 | down_read(&bnep_session_sem); | |
629 | ||
630 | s = __bnep_get_session(req->dst); | |
631 | if (s) { | |
632 | /* Wakeup user-space which is polling for socket errors. | |
633 | * This is temporary hack untill we have shutdown in L2CAP */ | |
634 | s->sock->sk->sk_err = EUNATCH; | |
8e87d142 | 635 | |
1da177e4 LT |
636 | /* Kill session thread */ |
637 | atomic_inc(&s->killed); | |
638 | wake_up_interruptible(s->sock->sk->sk_sleep); | |
639 | } else | |
640 | err = -ENOENT; | |
641 | ||
642 | up_read(&bnep_session_sem); | |
643 | return err; | |
644 | } | |
645 | ||
646 | static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s) | |
647 | { | |
648 | memcpy(ci->dst, s->eh.h_source, ETH_ALEN); | |
649 | strcpy(ci->device, s->dev->name); | |
650 | ci->flags = s->flags; | |
651 | ci->state = s->state; | |
652 | ci->role = s->role; | |
653 | } | |
654 | ||
655 | int bnep_get_connlist(struct bnep_connlist_req *req) | |
656 | { | |
657 | struct list_head *p; | |
658 | int err = 0, n = 0; | |
659 | ||
660 | down_read(&bnep_session_sem); | |
661 | ||
662 | list_for_each(p, &bnep_session_list) { | |
663 | struct bnep_session *s; | |
664 | struct bnep_conninfo ci; | |
665 | ||
666 | s = list_entry(p, struct bnep_session, list); | |
667 | ||
668 | __bnep_copy_ci(&ci, s); | |
8e87d142 | 669 | |
1da177e4 LT |
670 | if (copy_to_user(req->ci, &ci, sizeof(ci))) { |
671 | err = -EFAULT; | |
672 | break; | |
673 | } | |
674 | ||
675 | if (++n >= req->cnum) | |
676 | break; | |
677 | ||
678 | req->ci++; | |
679 | } | |
680 | req->cnum = n; | |
681 | ||
682 | up_read(&bnep_session_sem); | |
683 | return err; | |
684 | } | |
685 | ||
686 | int bnep_get_conninfo(struct bnep_conninfo *ci) | |
687 | { | |
688 | struct bnep_session *s; | |
689 | int err = 0; | |
690 | ||
691 | down_read(&bnep_session_sem); | |
692 | ||
693 | s = __bnep_get_session(ci->dst); | |
694 | if (s) | |
695 | __bnep_copy_ci(ci, s); | |
696 | else | |
697 | err = -ENOENT; | |
698 | ||
699 | up_read(&bnep_session_sem); | |
700 | return err; | |
701 | } | |
702 | ||
703 | static int __init bnep_init(void) | |
8e87d142 | 704 | { |
1da177e4 LT |
705 | char flt[50] = ""; |
706 | ||
707 | l2cap_load(); | |
708 | ||
709 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
710 | strcat(flt, "protocol "); | |
711 | #endif | |
712 | ||
713 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
714 | strcat(flt, "multicast"); | |
715 | #endif | |
716 | ||
717 | BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION); | |
718 | if (flt[0]) | |
719 | BT_INFO("BNEP filters: %s", flt); | |
720 | ||
721 | bnep_sock_init(); | |
722 | return 0; | |
723 | } | |
724 | ||
725 | static void __exit bnep_exit(void) | |
726 | { | |
727 | bnep_sock_cleanup(); | |
728 | } | |
729 | ||
730 | module_init(bnep_init); | |
731 | module_exit(bnep_exit); | |
732 | ||
28111eb2 MH |
733 | module_param(compress_src, bool, 0644); |
734 | MODULE_PARM_DESC(compress_src, "Compress sources headers"); | |
735 | ||
736 | module_param(compress_dst, bool, 0644); | |
737 | MODULE_PARM_DESC(compress_dst, "Compress destination headers"); | |
738 | ||
63fbd24e | 739 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
740 | MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION); |
741 | MODULE_VERSION(VERSION); | |
742 | MODULE_LICENSE("GPL"); | |
743 | MODULE_ALIAS("bt-proto-4"); |