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 | ||
28111eb2 MH |
55 | #define VERSION "1.3" |
56 | ||
57 | static int compress_src = 1; | |
58 | static int compress_dst = 1; | |
1da177e4 LT |
59 | |
60 | static LIST_HEAD(bnep_session_list); | |
61 | static DECLARE_RWSEM(bnep_session_sem); | |
62 | ||
63 | static struct bnep_session *__bnep_get_session(u8 *dst) | |
64 | { | |
65 | struct bnep_session *s; | |
66 | struct list_head *p; | |
67 | ||
68 | BT_DBG(""); | |
69 | ||
70 | list_for_each(p, &bnep_session_list) { | |
8e87d142 | 71 | s = list_entry(p, struct bnep_session, list); |
d3f4a687 | 72 | if (!compare_ether_addr(dst, s->eh.h_source)) |
1da177e4 LT |
73 | return s; |
74 | } | |
75 | return NULL; | |
76 | } | |
77 | ||
78 | static void __bnep_link_session(struct bnep_session *s) | |
79 | { | |
80 | /* It's safe to call __module_get() here because sessions are added | |
81 | by the socket layer which has to hold the refference to this module. | |
82 | */ | |
83 | __module_get(THIS_MODULE); | |
8e87d142 | 84 | list_add(&s->list, &bnep_session_list); |
1da177e4 LT |
85 | } |
86 | ||
87 | static void __bnep_unlink_session(struct bnep_session *s) | |
88 | { | |
89 | list_del(&s->list); | |
90 | module_put(THIS_MODULE); | |
91 | } | |
92 | ||
93 | static int bnep_send(struct bnep_session *s, void *data, size_t len) | |
94 | { | |
95 | struct socket *sock = s->sock; | |
96 | struct kvec iv = { data, len }; | |
97 | ||
98 | return kernel_sendmsg(sock, &s->msg, &iv, 1, len); | |
99 | } | |
100 | ||
101 | static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp) | |
102 | { | |
103 | struct bnep_control_rsp rsp; | |
104 | rsp.type = BNEP_CONTROL; | |
105 | rsp.ctrl = ctrl; | |
106 | rsp.resp = htons(resp); | |
107 | return bnep_send(s, &rsp, sizeof(rsp)); | |
108 | } | |
109 | ||
110 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
111 | static inline void bnep_set_default_proto_filter(struct bnep_session *s) | |
112 | { | |
113 | /* (IPv4, ARP) */ | |
e41d2169 AV |
114 | s->proto_filter[0].start = ETH_P_IP; |
115 | s->proto_filter[0].end = ETH_P_ARP; | |
1da177e4 | 116 | /* (RARP, AppleTalk) */ |
e41d2169 AV |
117 | s->proto_filter[1].start = ETH_P_RARP; |
118 | s->proto_filter[1].end = ETH_P_AARP; | |
1da177e4 | 119 | /* (IPX, IPv6) */ |
e41d2169 AV |
120 | s->proto_filter[2].start = ETH_P_IPX; |
121 | s->proto_filter[2].end = ETH_P_IPV6; | |
1da177e4 LT |
122 | } |
123 | #endif | |
124 | ||
1bc5d448 | 125 | static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len) |
1da177e4 LT |
126 | { |
127 | int n; | |
128 | ||
129 | if (len < 2) | |
130 | return -EILSEQ; | |
131 | ||
83985319 | 132 | n = get_unaligned_be16(data); |
1da177e4 LT |
133 | data++; len -= 2; |
134 | ||
135 | if (len < n) | |
136 | return -EILSEQ; | |
137 | ||
138 | BT_DBG("filter len %d", n); | |
139 | ||
140 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
141 | n /= 4; | |
142 | if (n <= BNEP_MAX_PROTO_FILTERS) { | |
143 | struct bnep_proto_filter *f = s->proto_filter; | |
144 | int i; | |
145 | ||
146 | for (i = 0; i < n; i++) { | |
83985319 HH |
147 | f[i].start = get_unaligned_be16(data++); |
148 | f[i].end = get_unaligned_be16(data++); | |
1da177e4 LT |
149 | |
150 | BT_DBG("proto filter start %d end %d", | |
151 | f[i].start, f[i].end); | |
152 | } | |
153 | ||
154 | if (i < BNEP_MAX_PROTO_FILTERS) | |
155 | memset(f + i, 0, sizeof(*f)); | |
156 | ||
157 | if (n == 0) | |
158 | bnep_set_default_proto_filter(s); | |
159 | ||
160 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS); | |
161 | } else { | |
162 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED); | |
163 | } | |
164 | #else | |
165 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
166 | #endif | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) | |
171 | { | |
172 | int n; | |
173 | ||
174 | if (len < 2) | |
175 | return -EILSEQ; | |
176 | ||
83985319 | 177 | n = get_unaligned_be16(data); |
1da177e4 LT |
178 | data += 2; len -= 2; |
179 | ||
180 | if (len < n) | |
181 | return -EILSEQ; | |
182 | ||
183 | BT_DBG("filter len %d", n); | |
184 | ||
185 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
186 | n /= (ETH_ALEN * 2); | |
187 | ||
188 | if (n > 0) { | |
189 | s->mc_filter = 0; | |
190 | ||
191 | /* Always send broadcast */ | |
192 | set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter); | |
193 | ||
194 | /* Add address ranges to the multicast hash */ | |
195 | for (; n > 0; n--) { | |
196 | u8 a1[6], *a2; | |
197 | ||
198 | memcpy(a1, data, ETH_ALEN); data += ETH_ALEN; | |
199 | a2 = data; data += ETH_ALEN; | |
8e87d142 | 200 | |
1da177e4 LT |
201 | BT_DBG("mc filter %s -> %s", |
202 | batostr((void *) a1), batostr((void *) a2)); | |
203 | ||
204 | #define INCA(a) { int i = 5; while (i >=0 && ++a[i--] == 0); } | |
205 | ||
206 | /* Iterate from a1 to a2 */ | |
207 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
208 | while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) { | |
209 | INCA(a1); | |
210 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | BT_DBG("mc filter hash 0x%llx", s->mc_filter); | |
216 | ||
217 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS); | |
218 | #else | |
219 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
220 | #endif | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static int bnep_rx_control(struct bnep_session *s, void *data, int len) | |
225 | { | |
226 | u8 cmd = *(u8 *)data; | |
227 | int err = 0; | |
228 | ||
229 | data++; len--; | |
230 | ||
231 | switch (cmd) { | |
232 | case BNEP_CMD_NOT_UNDERSTOOD: | |
233 | case BNEP_SETUP_CONN_REQ: | |
234 | case BNEP_SETUP_CONN_RSP: | |
235 | case BNEP_FILTER_NET_TYPE_RSP: | |
236 | case BNEP_FILTER_MULTI_ADDR_RSP: | |
237 | /* Ignore these for now */ | |
238 | break; | |
239 | ||
240 | case BNEP_FILTER_NET_TYPE_SET: | |
241 | err = bnep_ctrl_set_netfilter(s, data, len); | |
242 | break; | |
243 | ||
244 | case BNEP_FILTER_MULTI_ADDR_SET: | |
245 | err = bnep_ctrl_set_mcfilter(s, data, len); | |
246 | break; | |
247 | ||
248 | default: { | |
249 | u8 pkt[3]; | |
250 | pkt[0] = BNEP_CONTROL; | |
251 | pkt[1] = BNEP_CMD_NOT_UNDERSTOOD; | |
252 | pkt[2] = cmd; | |
253 | bnep_send(s, pkt, sizeof(pkt)); | |
254 | } | |
255 | break; | |
256 | } | |
257 | ||
258 | return err; | |
259 | } | |
260 | ||
261 | static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb) | |
262 | { | |
263 | struct bnep_ext_hdr *h; | |
264 | int err = 0; | |
265 | ||
266 | do { | |
267 | h = (void *) skb->data; | |
268 | if (!skb_pull(skb, sizeof(*h))) { | |
269 | err = -EILSEQ; | |
270 | break; | |
271 | } | |
272 | ||
273 | BT_DBG("type 0x%x len %d", h->type, h->len); | |
8e87d142 | 274 | |
1da177e4 LT |
275 | switch (h->type & BNEP_TYPE_MASK) { |
276 | case BNEP_EXT_CONTROL: | |
277 | bnep_rx_control(s, skb->data, skb->len); | |
278 | break; | |
279 | ||
280 | default: | |
281 | /* Unknown extension, skip it. */ | |
282 | break; | |
283 | } | |
284 | ||
285 | if (!skb_pull(skb, h->len)) { | |
286 | err = -EILSEQ; | |
287 | break; | |
288 | } | |
289 | } while (!err && (h->type & BNEP_EXT_HEADER)); | |
8e87d142 | 290 | |
1da177e4 LT |
291 | return err; |
292 | } | |
293 | ||
294 | static u8 __bnep_rx_hlen[] = { | |
295 | ETH_HLEN, /* BNEP_GENERAL */ | |
296 | 0, /* BNEP_CONTROL */ | |
297 | 2, /* BNEP_COMPRESSED */ | |
298 | ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */ | |
299 | ETH_ALEN + 2 /* BNEP_COMPRESSED_DST_ONLY */ | |
300 | }; | |
301 | #define BNEP_RX_TYPES (sizeof(__bnep_rx_hlen) - 1) | |
302 | ||
303 | static inline int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) | |
304 | { | |
305 | struct net_device *dev = s->dev; | |
306 | struct sk_buff *nskb; | |
307 | u8 type; | |
308 | ||
b4d7f0a4 | 309 | dev->stats.rx_bytes += skb->len; |
1da177e4 LT |
310 | |
311 | type = *(u8 *) skb->data; skb_pull(skb, 1); | |
312 | ||
313 | if ((type & BNEP_TYPE_MASK) > BNEP_RX_TYPES) | |
314 | goto badframe; | |
8e87d142 | 315 | |
1da177e4 LT |
316 | if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) { |
317 | bnep_rx_control(s, skb->data, skb->len); | |
318 | kfree_skb(skb); | |
319 | return 0; | |
320 | } | |
321 | ||
459a98ed | 322 | skb_reset_mac_header(skb); |
1da177e4 LT |
323 | |
324 | /* Verify and pull out header */ | |
325 | if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK])) | |
326 | goto badframe; | |
327 | ||
1bc5d448 | 328 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 LT |
329 | |
330 | if (type & BNEP_EXT_HEADER) { | |
331 | if (bnep_rx_extension(s, skb) < 0) | |
332 | goto badframe; | |
333 | } | |
334 | ||
335 | /* Strip 802.1p header */ | |
336 | if (ntohs(s->eh.h_proto) == 0x8100) { | |
337 | if (!skb_pull(skb, 4)) | |
338 | goto badframe; | |
1bc5d448 | 339 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 | 340 | } |
8e87d142 | 341 | |
1da177e4 LT |
342 | /* We have to alloc new skb and copy data here :(. Because original skb |
343 | * may not be modified and because of the alignment requirements. */ | |
344 | nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL); | |
345 | if (!nskb) { | |
b4d7f0a4 | 346 | dev->stats.rx_dropped++; |
1da177e4 LT |
347 | kfree_skb(skb); |
348 | return -ENOMEM; | |
349 | } | |
350 | skb_reserve(nskb, 2); | |
351 | ||
352 | /* Decompress header and construct ether frame */ | |
353 | switch (type & BNEP_TYPE_MASK) { | |
354 | case BNEP_COMPRESSED: | |
355 | memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN); | |
356 | break; | |
8e87d142 | 357 | |
1da177e4 LT |
358 | case BNEP_COMPRESSED_SRC_ONLY: |
359 | memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN); | |
98e399f8 | 360 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN); |
1bc5d448 | 361 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
362 | break; |
363 | ||
364 | case BNEP_COMPRESSED_DST_ONLY: | |
98e399f8 ACM |
365 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), |
366 | ETH_ALEN); | |
367 | memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source, | |
368 | ETH_ALEN + 2); | |
1da177e4 LT |
369 | break; |
370 | ||
371 | case BNEP_GENERAL: | |
98e399f8 ACM |
372 | memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb), |
373 | ETH_ALEN * 2); | |
1bc5d448 | 374 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
375 | break; |
376 | } | |
377 | ||
d626f62b | 378 | skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len); |
1da177e4 | 379 | kfree_skb(skb); |
8e87d142 | 380 | |
b4d7f0a4 | 381 | dev->stats.rx_packets++; |
1da177e4 LT |
382 | nskb->ip_summed = CHECKSUM_NONE; |
383 | nskb->protocol = eth_type_trans(nskb, dev); | |
384 | netif_rx_ni(nskb); | |
385 | return 0; | |
386 | ||
387 | badframe: | |
b4d7f0a4 | 388 | dev->stats.rx_errors++; |
1da177e4 LT |
389 | kfree_skb(skb); |
390 | return 0; | |
391 | } | |
392 | ||
393 | static u8 __bnep_tx_types[] = { | |
394 | BNEP_GENERAL, | |
395 | BNEP_COMPRESSED_SRC_ONLY, | |
396 | BNEP_COMPRESSED_DST_ONLY, | |
397 | BNEP_COMPRESSED | |
398 | }; | |
399 | ||
400 | static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) | |
401 | { | |
402 | struct ethhdr *eh = (void *) skb->data; | |
403 | struct socket *sock = s->sock; | |
404 | struct kvec iv[3]; | |
405 | int len = 0, il = 0; | |
406 | u8 type = 0; | |
407 | ||
408 | BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type); | |
409 | ||
410 | if (!skb->dev) { | |
411 | /* Control frame sent by us */ | |
412 | goto send; | |
413 | } | |
414 | ||
415 | iv[il++] = (struct kvec) { &type, 1 }; | |
416 | len++; | |
417 | ||
28111eb2 | 418 | if (compress_src && !compare_ether_addr(eh->h_dest, s->eh.h_source)) |
1da177e4 LT |
419 | type |= 0x01; |
420 | ||
28111eb2 | 421 | if (compress_dst && !compare_ether_addr(eh->h_source, s->eh.h_dest)) |
1da177e4 LT |
422 | type |= 0x02; |
423 | ||
424 | if (type) | |
425 | skb_pull(skb, ETH_ALEN * 2); | |
426 | ||
427 | type = __bnep_tx_types[type]; | |
428 | switch (type) { | |
429 | case BNEP_COMPRESSED_SRC_ONLY: | |
430 | iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN }; | |
431 | len += ETH_ALEN; | |
432 | break; | |
8e87d142 | 433 | |
1da177e4 LT |
434 | case BNEP_COMPRESSED_DST_ONLY: |
435 | iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN }; | |
436 | len += ETH_ALEN; | |
437 | break; | |
438 | } | |
439 | ||
440 | send: | |
441 | iv[il++] = (struct kvec) { skb->data, skb->len }; | |
442 | len += skb->len; | |
8e87d142 | 443 | |
1da177e4 LT |
444 | /* FIXME: linearize skb */ |
445 | { | |
446 | len = kernel_sendmsg(sock, &s->msg, iv, il, len); | |
447 | } | |
448 | kfree_skb(skb); | |
449 | ||
450 | if (len > 0) { | |
b4d7f0a4 SH |
451 | s->dev->stats.tx_bytes += len; |
452 | s->dev->stats.tx_packets++; | |
1da177e4 LT |
453 | return 0; |
454 | } | |
455 | ||
456 | return len; | |
457 | } | |
458 | ||
459 | static int bnep_session(void *arg) | |
460 | { | |
461 | struct bnep_session *s = arg; | |
462 | struct net_device *dev = s->dev; | |
463 | struct sock *sk = s->sock->sk; | |
464 | struct sk_buff *skb; | |
465 | wait_queue_t wait; | |
466 | ||
467 | BT_DBG(""); | |
468 | ||
8e87d142 | 469 | daemonize("kbnepd %s", dev->name); |
1da177e4 | 470 | set_user_nice(current, -15); |
1da177e4 LT |
471 | |
472 | init_waitqueue_entry(&wait, current); | |
473 | add_wait_queue(sk->sk_sleep, &wait); | |
474 | while (!atomic_read(&s->killed)) { | |
475 | set_current_state(TASK_INTERRUPTIBLE); | |
476 | ||
477 | // RX | |
478 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
479 | skb_orphan(skb); | |
480 | bnep_rx_frame(s, skb); | |
481 | } | |
482 | ||
483 | if (sk->sk_state != BT_CONNECTED) | |
484 | break; | |
8e87d142 | 485 | |
1da177e4 LT |
486 | // TX |
487 | while ((skb = skb_dequeue(&sk->sk_write_queue))) | |
488 | if (bnep_tx_frame(s, skb)) | |
489 | break; | |
490 | netif_wake_queue(dev); | |
8e87d142 | 491 | |
1da177e4 LT |
492 | schedule(); |
493 | } | |
494 | set_current_state(TASK_RUNNING); | |
495 | remove_wait_queue(sk->sk_sleep, &wait); | |
496 | ||
497 | /* Cleanup session */ | |
498 | down_write(&bnep_session_sem); | |
499 | ||
500 | /* Delete network device */ | |
501 | unregister_netdev(dev); | |
502 | ||
ec8dab36 MH |
503 | /* Wakeup user-space polling for socket errors */ |
504 | s->sock->sk->sk_err = EUNATCH; | |
505 | ||
506 | wake_up_interruptible(s->sock->sk->sk_sleep); | |
507 | ||
1da177e4 LT |
508 | /* Release the socket */ |
509 | fput(s->sock->file); | |
510 | ||
511 | __bnep_unlink_session(s); | |
512 | ||
513 | up_write(&bnep_session_sem); | |
514 | free_netdev(dev); | |
515 | return 0; | |
516 | } | |
517 | ||
0a85b964 MH |
518 | static struct device *bnep_get_device(struct bnep_session *session) |
519 | { | |
520 | bdaddr_t *src = &bt_sk(session->sock->sk)->src; | |
521 | bdaddr_t *dst = &bt_sk(session->sock->sk)->dst; | |
522 | struct hci_dev *hdev; | |
523 | struct hci_conn *conn; | |
524 | ||
525 | hdev = hci_get_route(dst, src); | |
526 | if (!hdev) | |
527 | return NULL; | |
528 | ||
529 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); | |
0a85b964 MH |
530 | |
531 | hci_dev_put(hdev); | |
532 | ||
b2cfcd75 | 533 | return conn ? &conn->dev : NULL; |
0a85b964 MH |
534 | } |
535 | ||
1da177e4 LT |
536 | int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) |
537 | { | |
538 | struct net_device *dev; | |
539 | struct bnep_session *s, *ss; | |
540 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
541 | int err; | |
542 | ||
543 | BT_DBG(""); | |
544 | ||
545 | baswap((void *) dst, &bt_sk(sock->sk)->dst); | |
546 | baswap((void *) src, &bt_sk(sock->sk)->src); | |
547 | ||
548 | /* session struct allocated as private part of net_device */ | |
549 | dev = alloc_netdev(sizeof(struct bnep_session), | |
550 | (*req->device) ? req->device : "bnep%d", | |
551 | bnep_net_setup); | |
67b52e55 TK |
552 | if (!dev) |
553 | return -ENOMEM; | |
1da177e4 | 554 | |
1da177e4 LT |
555 | down_write(&bnep_session_sem); |
556 | ||
557 | ss = __bnep_get_session(dst); | |
558 | if (ss && ss->state == BT_CONNECTED) { | |
559 | err = -EEXIST; | |
560 | goto failed; | |
561 | } | |
562 | ||
524ad0a7 | 563 | s = netdev_priv(dev); |
1da177e4 LT |
564 | |
565 | /* This is rx header therefore addresses are swapped. | |
566 | * ie eh.h_dest is our local address. */ | |
567 | memcpy(s->eh.h_dest, &src, ETH_ALEN); | |
568 | memcpy(s->eh.h_source, &dst, ETH_ALEN); | |
569 | memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN); | |
570 | ||
0a85b964 | 571 | s->dev = dev; |
1da177e4 LT |
572 | s->sock = sock; |
573 | s->role = req->role; | |
574 | s->state = BT_CONNECTED; | |
8e87d142 | 575 | |
1da177e4 LT |
576 | s->msg.msg_flags = MSG_NOSIGNAL; |
577 | ||
578 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
579 | /* Set default mc filter */ | |
580 | set_bit(bnep_mc_hash(dev->broadcast), (ulong *) &s->mc_filter); | |
581 | #endif | |
582 | ||
583 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
584 | /* Set default protocol filter */ | |
585 | bnep_set_default_proto_filter(s); | |
586 | #endif | |
587 | ||
0a85b964 MH |
588 | SET_NETDEV_DEV(dev, bnep_get_device(s)); |
589 | ||
1da177e4 LT |
590 | err = register_netdev(dev); |
591 | if (err) { | |
592 | goto failed; | |
593 | } | |
594 | ||
595 | __bnep_link_session(s); | |
8e87d142 | 596 | |
1da177e4 LT |
597 | err = kernel_thread(bnep_session, s, CLONE_KERNEL); |
598 | if (err < 0) { | |
599 | /* Session thread start failed, gotta cleanup. */ | |
600 | unregister_netdev(dev); | |
601 | __bnep_unlink_session(s); | |
602 | goto failed; | |
603 | } | |
604 | ||
605 | up_write(&bnep_session_sem); | |
606 | strcpy(req->device, dev->name); | |
607 | return 0; | |
608 | ||
609 | failed: | |
610 | up_write(&bnep_session_sem); | |
611 | free_netdev(dev); | |
612 | return err; | |
613 | } | |
614 | ||
615 | int bnep_del_connection(struct bnep_conndel_req *req) | |
616 | { | |
617 | struct bnep_session *s; | |
618 | int err = 0; | |
619 | ||
620 | BT_DBG(""); | |
621 | ||
622 | down_read(&bnep_session_sem); | |
623 | ||
624 | s = __bnep_get_session(req->dst); | |
625 | if (s) { | |
626 | /* Wakeup user-space which is polling for socket errors. | |
627 | * This is temporary hack untill we have shutdown in L2CAP */ | |
628 | s->sock->sk->sk_err = EUNATCH; | |
8e87d142 | 629 | |
1da177e4 LT |
630 | /* Kill session thread */ |
631 | atomic_inc(&s->killed); | |
632 | wake_up_interruptible(s->sock->sk->sk_sleep); | |
633 | } else | |
634 | err = -ENOENT; | |
635 | ||
636 | up_read(&bnep_session_sem); | |
637 | return err; | |
638 | } | |
639 | ||
640 | static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s) | |
641 | { | |
642 | memcpy(ci->dst, s->eh.h_source, ETH_ALEN); | |
643 | strcpy(ci->device, s->dev->name); | |
644 | ci->flags = s->flags; | |
645 | ci->state = s->state; | |
646 | ci->role = s->role; | |
647 | } | |
648 | ||
649 | int bnep_get_connlist(struct bnep_connlist_req *req) | |
650 | { | |
651 | struct list_head *p; | |
652 | int err = 0, n = 0; | |
653 | ||
654 | down_read(&bnep_session_sem); | |
655 | ||
656 | list_for_each(p, &bnep_session_list) { | |
657 | struct bnep_session *s; | |
658 | struct bnep_conninfo ci; | |
659 | ||
660 | s = list_entry(p, struct bnep_session, list); | |
661 | ||
662 | __bnep_copy_ci(&ci, s); | |
8e87d142 | 663 | |
1da177e4 LT |
664 | if (copy_to_user(req->ci, &ci, sizeof(ci))) { |
665 | err = -EFAULT; | |
666 | break; | |
667 | } | |
668 | ||
669 | if (++n >= req->cnum) | |
670 | break; | |
671 | ||
672 | req->ci++; | |
673 | } | |
674 | req->cnum = n; | |
675 | ||
676 | up_read(&bnep_session_sem); | |
677 | return err; | |
678 | } | |
679 | ||
680 | int bnep_get_conninfo(struct bnep_conninfo *ci) | |
681 | { | |
682 | struct bnep_session *s; | |
683 | int err = 0; | |
684 | ||
685 | down_read(&bnep_session_sem); | |
686 | ||
687 | s = __bnep_get_session(ci->dst); | |
688 | if (s) | |
689 | __bnep_copy_ci(ci, s); | |
690 | else | |
691 | err = -ENOENT; | |
692 | ||
693 | up_read(&bnep_session_sem); | |
694 | return err; | |
695 | } | |
696 | ||
697 | static int __init bnep_init(void) | |
8e87d142 | 698 | { |
1da177e4 LT |
699 | char flt[50] = ""; |
700 | ||
701 | l2cap_load(); | |
702 | ||
703 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
704 | strcat(flt, "protocol "); | |
705 | #endif | |
706 | ||
707 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
708 | strcat(flt, "multicast"); | |
709 | #endif | |
710 | ||
711 | BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION); | |
712 | if (flt[0]) | |
713 | BT_INFO("BNEP filters: %s", flt); | |
714 | ||
715 | bnep_sock_init(); | |
716 | return 0; | |
717 | } | |
718 | ||
719 | static void __exit bnep_exit(void) | |
720 | { | |
721 | bnep_sock_cleanup(); | |
722 | } | |
723 | ||
724 | module_init(bnep_init); | |
725 | module_exit(bnep_exit); | |
726 | ||
28111eb2 MH |
727 | module_param(compress_src, bool, 0644); |
728 | MODULE_PARM_DESC(compress_src, "Compress sources headers"); | |
729 | ||
730 | module_param(compress_dst, bool, 0644); | |
731 | MODULE_PARM_DESC(compress_dst, "Compress destination headers"); | |
732 | ||
63fbd24e | 733 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
734 | MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION); |
735 | MODULE_VERSION(VERSION); | |
736 | MODULE_LICENSE("GPL"); | |
737 | MODULE_ALIAS("bt-proto-4"); |