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 | 37 | #include <linux/net.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
1da177e4 LT |
39 | #include <net/sock.h> |
40 | ||
41 | #include <linux/socket.h> | |
42 | #include <linux/file.h> | |
43 | ||
44 | #include <linux/netdevice.h> | |
45 | #include <linux/etherdevice.h> | |
46 | #include <linux/skbuff.h> | |
47 | ||
48 | #include <asm/unaligned.h> | |
49 | ||
50 | #include <net/bluetooth/bluetooth.h> | |
0a85b964 | 51 | #include <net/bluetooth/hci_core.h> |
1da177e4 LT |
52 | #include <net/bluetooth/l2cap.h> |
53 | ||
54 | #include "bnep.h" | |
55 | ||
28111eb2 MH |
56 | #define VERSION "1.3" |
57 | ||
58 | static int compress_src = 1; | |
59 | static int compress_dst = 1; | |
1da177e4 LT |
60 | |
61 | static LIST_HEAD(bnep_session_list); | |
62 | static DECLARE_RWSEM(bnep_session_sem); | |
63 | ||
64 | static struct bnep_session *__bnep_get_session(u8 *dst) | |
65 | { | |
66 | struct bnep_session *s; | |
67 | struct list_head *p; | |
68 | ||
69 | BT_DBG(""); | |
70 | ||
71 | list_for_each(p, &bnep_session_list) { | |
8e87d142 | 72 | s = list_entry(p, struct bnep_session, list); |
d3f4a687 | 73 | if (!compare_ether_addr(dst, s->eh.h_source)) |
1da177e4 LT |
74 | return s; |
75 | } | |
76 | return NULL; | |
77 | } | |
78 | ||
79 | static void __bnep_link_session(struct bnep_session *s) | |
80 | { | |
81 | /* It's safe to call __module_get() here because sessions are added | |
94e2bd68 | 82 | by the socket layer which has to hold the reference to this module. |
1da177e4 LT |
83 | */ |
84 | __module_get(THIS_MODULE); | |
8e87d142 | 85 | list_add(&s->list, &bnep_session_list); |
1da177e4 LT |
86 | } |
87 | ||
88 | static void __bnep_unlink_session(struct bnep_session *s) | |
89 | { | |
90 | list_del(&s->list); | |
91 | module_put(THIS_MODULE); | |
92 | } | |
93 | ||
94 | static int bnep_send(struct bnep_session *s, void *data, size_t len) | |
95 | { | |
96 | struct socket *sock = s->sock; | |
97 | struct kvec iv = { data, len }; | |
98 | ||
99 | return kernel_sendmsg(sock, &s->msg, &iv, 1, len); | |
100 | } | |
101 | ||
102 | static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp) | |
103 | { | |
104 | struct bnep_control_rsp rsp; | |
105 | rsp.type = BNEP_CONTROL; | |
106 | rsp.ctrl = ctrl; | |
107 | rsp.resp = htons(resp); | |
108 | return bnep_send(s, &rsp, sizeof(rsp)); | |
109 | } | |
110 | ||
111 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
112 | static inline void bnep_set_default_proto_filter(struct bnep_session *s) | |
113 | { | |
114 | /* (IPv4, ARP) */ | |
e41d2169 AV |
115 | s->proto_filter[0].start = ETH_P_IP; |
116 | s->proto_filter[0].end = ETH_P_ARP; | |
1da177e4 | 117 | /* (RARP, AppleTalk) */ |
e41d2169 AV |
118 | s->proto_filter[1].start = ETH_P_RARP; |
119 | s->proto_filter[1].end = ETH_P_AARP; | |
1da177e4 | 120 | /* (IPX, IPv6) */ |
e41d2169 AV |
121 | s->proto_filter[2].start = ETH_P_IPX; |
122 | s->proto_filter[2].end = ETH_P_IPV6; | |
1da177e4 LT |
123 | } |
124 | #endif | |
125 | ||
1bc5d448 | 126 | static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len) |
1da177e4 LT |
127 | { |
128 | int n; | |
129 | ||
130 | if (len < 2) | |
131 | return -EILSEQ; | |
132 | ||
83985319 | 133 | n = get_unaligned_be16(data); |
1da177e4 LT |
134 | data++; len -= 2; |
135 | ||
136 | if (len < n) | |
137 | return -EILSEQ; | |
138 | ||
139 | BT_DBG("filter len %d", n); | |
140 | ||
141 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
142 | n /= 4; | |
143 | if (n <= BNEP_MAX_PROTO_FILTERS) { | |
144 | struct bnep_proto_filter *f = s->proto_filter; | |
145 | int i; | |
146 | ||
147 | for (i = 0; i < n; i++) { | |
83985319 HH |
148 | f[i].start = get_unaligned_be16(data++); |
149 | f[i].end = get_unaligned_be16(data++); | |
1da177e4 LT |
150 | |
151 | BT_DBG("proto filter start %d end %d", | |
152 | f[i].start, f[i].end); | |
153 | } | |
154 | ||
155 | if (i < BNEP_MAX_PROTO_FILTERS) | |
156 | memset(f + i, 0, sizeof(*f)); | |
157 | ||
158 | if (n == 0) | |
159 | bnep_set_default_proto_filter(s); | |
160 | ||
161 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS); | |
162 | } else { | |
163 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED); | |
164 | } | |
165 | #else | |
166 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
167 | #endif | |
168 | return 0; | |
169 | } | |
170 | ||
171 | static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) | |
172 | { | |
173 | int n; | |
174 | ||
175 | if (len < 2) | |
176 | return -EILSEQ; | |
177 | ||
83985319 | 178 | n = get_unaligned_be16(data); |
1da177e4 LT |
179 | data += 2; len -= 2; |
180 | ||
181 | if (len < n) | |
182 | return -EILSEQ; | |
183 | ||
184 | BT_DBG("filter len %d", n); | |
185 | ||
186 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
187 | n /= (ETH_ALEN * 2); | |
188 | ||
189 | if (n > 0) { | |
190 | s->mc_filter = 0; | |
191 | ||
192 | /* Always send broadcast */ | |
193 | set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter); | |
194 | ||
195 | /* Add address ranges to the multicast hash */ | |
196 | for (; n > 0; n--) { | |
197 | u8 a1[6], *a2; | |
198 | ||
199 | memcpy(a1, data, ETH_ALEN); data += ETH_ALEN; | |
200 | a2 = data; data += ETH_ALEN; | |
8e87d142 | 201 | |
1da177e4 LT |
202 | BT_DBG("mc filter %s -> %s", |
203 | batostr((void *) a1), batostr((void *) a2)); | |
204 | ||
205 | #define INCA(a) { int i = 5; while (i >=0 && ++a[i--] == 0); } | |
206 | ||
207 | /* Iterate from a1 to a2 */ | |
208 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
209 | while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) { | |
210 | INCA(a1); | |
211 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
212 | } | |
213 | } | |
214 | } | |
215 | ||
216 | BT_DBG("mc filter hash 0x%llx", s->mc_filter); | |
217 | ||
218 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS); | |
219 | #else | |
220 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
221 | #endif | |
222 | return 0; | |
223 | } | |
224 | ||
225 | static int bnep_rx_control(struct bnep_session *s, void *data, int len) | |
226 | { | |
227 | u8 cmd = *(u8 *)data; | |
228 | int err = 0; | |
229 | ||
230 | data++; len--; | |
231 | ||
232 | switch (cmd) { | |
233 | case BNEP_CMD_NOT_UNDERSTOOD: | |
1da177e4 LT |
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 | ||
cde9f807 VK |
248 | case BNEP_SETUP_CONN_REQ: |
249 | err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP, BNEP_CONN_NOT_ALLOWED); | |
250 | break; | |
251 | ||
1da177e4 LT |
252 | default: { |
253 | u8 pkt[3]; | |
254 | pkt[0] = BNEP_CONTROL; | |
255 | pkt[1] = BNEP_CMD_NOT_UNDERSTOOD; | |
256 | pkt[2] = cmd; | |
257 | bnep_send(s, pkt, sizeof(pkt)); | |
258 | } | |
259 | break; | |
260 | } | |
261 | ||
262 | return err; | |
263 | } | |
264 | ||
265 | static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb) | |
266 | { | |
267 | struct bnep_ext_hdr *h; | |
268 | int err = 0; | |
269 | ||
270 | do { | |
271 | h = (void *) skb->data; | |
272 | if (!skb_pull(skb, sizeof(*h))) { | |
273 | err = -EILSEQ; | |
274 | break; | |
275 | } | |
276 | ||
277 | BT_DBG("type 0x%x len %d", h->type, h->len); | |
8e87d142 | 278 | |
1da177e4 LT |
279 | switch (h->type & BNEP_TYPE_MASK) { |
280 | case BNEP_EXT_CONTROL: | |
281 | bnep_rx_control(s, skb->data, skb->len); | |
282 | break; | |
283 | ||
284 | default: | |
285 | /* Unknown extension, skip it. */ | |
286 | break; | |
287 | } | |
288 | ||
289 | if (!skb_pull(skb, h->len)) { | |
290 | err = -EILSEQ; | |
291 | break; | |
292 | } | |
293 | } while (!err && (h->type & BNEP_EXT_HEADER)); | |
8e87d142 | 294 | |
1da177e4 LT |
295 | return err; |
296 | } | |
297 | ||
298 | static u8 __bnep_rx_hlen[] = { | |
299 | ETH_HLEN, /* BNEP_GENERAL */ | |
300 | 0, /* BNEP_CONTROL */ | |
301 | 2, /* BNEP_COMPRESSED */ | |
302 | ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */ | |
303 | ETH_ALEN + 2 /* BNEP_COMPRESSED_DST_ONLY */ | |
304 | }; | |
305 | #define BNEP_RX_TYPES (sizeof(__bnep_rx_hlen) - 1) | |
306 | ||
307 | static inline int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) | |
308 | { | |
309 | struct net_device *dev = s->dev; | |
310 | struct sk_buff *nskb; | |
311 | u8 type; | |
312 | ||
b4d7f0a4 | 313 | dev->stats.rx_bytes += skb->len; |
1da177e4 LT |
314 | |
315 | type = *(u8 *) skb->data; skb_pull(skb, 1); | |
316 | ||
317 | if ((type & BNEP_TYPE_MASK) > BNEP_RX_TYPES) | |
318 | goto badframe; | |
8e87d142 | 319 | |
1da177e4 LT |
320 | if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) { |
321 | bnep_rx_control(s, skb->data, skb->len); | |
322 | kfree_skb(skb); | |
323 | return 0; | |
324 | } | |
325 | ||
459a98ed | 326 | skb_reset_mac_header(skb); |
1da177e4 LT |
327 | |
328 | /* Verify and pull out header */ | |
329 | if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK])) | |
330 | goto badframe; | |
331 | ||
1bc5d448 | 332 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 LT |
333 | |
334 | if (type & BNEP_EXT_HEADER) { | |
335 | if (bnep_rx_extension(s, skb) < 0) | |
336 | goto badframe; | |
337 | } | |
338 | ||
339 | /* Strip 802.1p header */ | |
340 | if (ntohs(s->eh.h_proto) == 0x8100) { | |
341 | if (!skb_pull(skb, 4)) | |
342 | goto badframe; | |
1bc5d448 | 343 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 | 344 | } |
8e87d142 | 345 | |
1da177e4 LT |
346 | /* We have to alloc new skb and copy data here :(. Because original skb |
347 | * may not be modified and because of the alignment requirements. */ | |
348 | nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL); | |
349 | if (!nskb) { | |
b4d7f0a4 | 350 | dev->stats.rx_dropped++; |
1da177e4 LT |
351 | kfree_skb(skb); |
352 | return -ENOMEM; | |
353 | } | |
354 | skb_reserve(nskb, 2); | |
355 | ||
356 | /* Decompress header and construct ether frame */ | |
357 | switch (type & BNEP_TYPE_MASK) { | |
358 | case BNEP_COMPRESSED: | |
359 | memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN); | |
360 | break; | |
8e87d142 | 361 | |
1da177e4 LT |
362 | case BNEP_COMPRESSED_SRC_ONLY: |
363 | memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN); | |
98e399f8 | 364 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN); |
1bc5d448 | 365 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
366 | break; |
367 | ||
368 | case BNEP_COMPRESSED_DST_ONLY: | |
98e399f8 ACM |
369 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), |
370 | ETH_ALEN); | |
371 | memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source, | |
372 | ETH_ALEN + 2); | |
1da177e4 LT |
373 | break; |
374 | ||
375 | case BNEP_GENERAL: | |
98e399f8 ACM |
376 | memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb), |
377 | ETH_ALEN * 2); | |
1bc5d448 | 378 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
379 | break; |
380 | } | |
381 | ||
d626f62b | 382 | skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len); |
1da177e4 | 383 | kfree_skb(skb); |
8e87d142 | 384 | |
b4d7f0a4 | 385 | dev->stats.rx_packets++; |
1da177e4 LT |
386 | nskb->ip_summed = CHECKSUM_NONE; |
387 | nskb->protocol = eth_type_trans(nskb, dev); | |
388 | netif_rx_ni(nskb); | |
389 | return 0; | |
390 | ||
391 | badframe: | |
b4d7f0a4 | 392 | dev->stats.rx_errors++; |
1da177e4 LT |
393 | kfree_skb(skb); |
394 | return 0; | |
395 | } | |
396 | ||
397 | static u8 __bnep_tx_types[] = { | |
398 | BNEP_GENERAL, | |
399 | BNEP_COMPRESSED_SRC_ONLY, | |
400 | BNEP_COMPRESSED_DST_ONLY, | |
401 | BNEP_COMPRESSED | |
402 | }; | |
403 | ||
404 | static inline int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) | |
405 | { | |
406 | struct ethhdr *eh = (void *) skb->data; | |
407 | struct socket *sock = s->sock; | |
408 | struct kvec iv[3]; | |
409 | int len = 0, il = 0; | |
410 | u8 type = 0; | |
411 | ||
412 | BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type); | |
413 | ||
414 | if (!skb->dev) { | |
415 | /* Control frame sent by us */ | |
416 | goto send; | |
417 | } | |
418 | ||
419 | iv[il++] = (struct kvec) { &type, 1 }; | |
420 | len++; | |
421 | ||
28111eb2 | 422 | if (compress_src && !compare_ether_addr(eh->h_dest, s->eh.h_source)) |
1da177e4 LT |
423 | type |= 0x01; |
424 | ||
28111eb2 | 425 | if (compress_dst && !compare_ether_addr(eh->h_source, s->eh.h_dest)) |
1da177e4 LT |
426 | type |= 0x02; |
427 | ||
428 | if (type) | |
429 | skb_pull(skb, ETH_ALEN * 2); | |
430 | ||
431 | type = __bnep_tx_types[type]; | |
432 | switch (type) { | |
433 | case BNEP_COMPRESSED_SRC_ONLY: | |
434 | iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN }; | |
435 | len += ETH_ALEN; | |
436 | break; | |
8e87d142 | 437 | |
1da177e4 LT |
438 | case BNEP_COMPRESSED_DST_ONLY: |
439 | iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN }; | |
440 | len += ETH_ALEN; | |
441 | break; | |
442 | } | |
443 | ||
444 | send: | |
445 | iv[il++] = (struct kvec) { skb->data, skb->len }; | |
446 | len += skb->len; | |
8e87d142 | 447 | |
1da177e4 LT |
448 | /* FIXME: linearize skb */ |
449 | { | |
450 | len = kernel_sendmsg(sock, &s->msg, iv, il, len); | |
451 | } | |
452 | kfree_skb(skb); | |
453 | ||
454 | if (len > 0) { | |
b4d7f0a4 SH |
455 | s->dev->stats.tx_bytes += len; |
456 | s->dev->stats.tx_packets++; | |
1da177e4 LT |
457 | return 0; |
458 | } | |
459 | ||
460 | return len; | |
461 | } | |
462 | ||
463 | static int bnep_session(void *arg) | |
464 | { | |
465 | struct bnep_session *s = arg; | |
466 | struct net_device *dev = s->dev; | |
467 | struct sock *sk = s->sock->sk; | |
468 | struct sk_buff *skb; | |
469 | wait_queue_t wait; | |
470 | ||
471 | BT_DBG(""); | |
472 | ||
8e87d142 | 473 | daemonize("kbnepd %s", dev->name); |
1da177e4 | 474 | set_user_nice(current, -15); |
1da177e4 LT |
475 | |
476 | init_waitqueue_entry(&wait, current); | |
477 | add_wait_queue(sk->sk_sleep, &wait); | |
478 | while (!atomic_read(&s->killed)) { | |
479 | set_current_state(TASK_INTERRUPTIBLE); | |
480 | ||
481 | // RX | |
482 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { | |
483 | skb_orphan(skb); | |
484 | bnep_rx_frame(s, skb); | |
485 | } | |
486 | ||
487 | if (sk->sk_state != BT_CONNECTED) | |
488 | break; | |
8e87d142 | 489 | |
1da177e4 LT |
490 | // TX |
491 | while ((skb = skb_dequeue(&sk->sk_write_queue))) | |
492 | if (bnep_tx_frame(s, skb)) | |
493 | break; | |
494 | netif_wake_queue(dev); | |
8e87d142 | 495 | |
1da177e4 LT |
496 | schedule(); |
497 | } | |
498 | set_current_state(TASK_RUNNING); | |
499 | remove_wait_queue(sk->sk_sleep, &wait); | |
500 | ||
501 | /* Cleanup session */ | |
502 | down_write(&bnep_session_sem); | |
503 | ||
504 | /* Delete network device */ | |
505 | unregister_netdev(dev); | |
506 | ||
ec8dab36 MH |
507 | /* Wakeup user-space polling for socket errors */ |
508 | s->sock->sk->sk_err = EUNATCH; | |
509 | ||
510 | wake_up_interruptible(s->sock->sk->sk_sleep); | |
511 | ||
1da177e4 LT |
512 | /* Release the socket */ |
513 | fput(s->sock->file); | |
514 | ||
515 | __bnep_unlink_session(s); | |
516 | ||
517 | up_write(&bnep_session_sem); | |
518 | free_netdev(dev); | |
519 | return 0; | |
520 | } | |
521 | ||
0a85b964 MH |
522 | static struct device *bnep_get_device(struct bnep_session *session) |
523 | { | |
524 | bdaddr_t *src = &bt_sk(session->sock->sk)->src; | |
525 | bdaddr_t *dst = &bt_sk(session->sock->sk)->dst; | |
526 | struct hci_dev *hdev; | |
527 | struct hci_conn *conn; | |
528 | ||
529 | hdev = hci_get_route(dst, src); | |
530 | if (!hdev) | |
531 | return NULL; | |
532 | ||
533 | conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst); | |
0a85b964 MH |
534 | |
535 | hci_dev_put(hdev); | |
536 | ||
b2cfcd75 | 537 | return conn ? &conn->dev : NULL; |
0a85b964 MH |
538 | } |
539 | ||
384912ed MH |
540 | static struct device_type bnep_type = { |
541 | .name = "bluetooth", | |
542 | }; | |
543 | ||
1da177e4 LT |
544 | int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) |
545 | { | |
546 | struct net_device *dev; | |
547 | struct bnep_session *s, *ss; | |
548 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
549 | int err; | |
550 | ||
551 | BT_DBG(""); | |
552 | ||
553 | baswap((void *) dst, &bt_sk(sock->sk)->dst); | |
554 | baswap((void *) src, &bt_sk(sock->sk)->src); | |
555 | ||
556 | /* session struct allocated as private part of net_device */ | |
557 | dev = alloc_netdev(sizeof(struct bnep_session), | |
558 | (*req->device) ? req->device : "bnep%d", | |
559 | bnep_net_setup); | |
67b52e55 TK |
560 | if (!dev) |
561 | return -ENOMEM; | |
1da177e4 | 562 | |
1da177e4 LT |
563 | down_write(&bnep_session_sem); |
564 | ||
565 | ss = __bnep_get_session(dst); | |
566 | if (ss && ss->state == BT_CONNECTED) { | |
567 | err = -EEXIST; | |
568 | goto failed; | |
569 | } | |
570 | ||
524ad0a7 | 571 | s = netdev_priv(dev); |
1da177e4 LT |
572 | |
573 | /* This is rx header therefore addresses are swapped. | |
574 | * ie eh.h_dest is our local address. */ | |
575 | memcpy(s->eh.h_dest, &src, ETH_ALEN); | |
576 | memcpy(s->eh.h_source, &dst, ETH_ALEN); | |
577 | memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN); | |
578 | ||
0a85b964 | 579 | s->dev = dev; |
1da177e4 LT |
580 | s->sock = sock; |
581 | s->role = req->role; | |
582 | s->state = BT_CONNECTED; | |
8e87d142 | 583 | |
1da177e4 LT |
584 | s->msg.msg_flags = MSG_NOSIGNAL; |
585 | ||
586 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
587 | /* Set default mc filter */ | |
588 | set_bit(bnep_mc_hash(dev->broadcast), (ulong *) &s->mc_filter); | |
589 | #endif | |
590 | ||
591 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
592 | /* Set default protocol filter */ | |
593 | bnep_set_default_proto_filter(s); | |
594 | #endif | |
595 | ||
0a85b964 | 596 | SET_NETDEV_DEV(dev, bnep_get_device(s)); |
384912ed | 597 | SET_NETDEV_DEVTYPE(dev, &bnep_type); |
0a85b964 | 598 | |
1da177e4 LT |
599 | err = register_netdev(dev); |
600 | if (err) { | |
601 | goto failed; | |
602 | } | |
603 | ||
604 | __bnep_link_session(s); | |
8e87d142 | 605 | |
1da177e4 LT |
606 | err = kernel_thread(bnep_session, s, CLONE_KERNEL); |
607 | if (err < 0) { | |
608 | /* Session thread start failed, gotta cleanup. */ | |
609 | unregister_netdev(dev); | |
610 | __bnep_unlink_session(s); | |
611 | goto failed; | |
612 | } | |
613 | ||
614 | up_write(&bnep_session_sem); | |
615 | strcpy(req->device, dev->name); | |
616 | return 0; | |
617 | ||
618 | failed: | |
619 | up_write(&bnep_session_sem); | |
620 | free_netdev(dev); | |
621 | return err; | |
622 | } | |
623 | ||
624 | int bnep_del_connection(struct bnep_conndel_req *req) | |
625 | { | |
626 | struct bnep_session *s; | |
627 | int err = 0; | |
628 | ||
629 | BT_DBG(""); | |
630 | ||
631 | down_read(&bnep_session_sem); | |
632 | ||
633 | s = __bnep_get_session(req->dst); | |
634 | if (s) { | |
635 | /* Wakeup user-space which is polling for socket errors. | |
94e2bd68 | 636 | * This is temporary hack until we have shutdown in L2CAP */ |
1da177e4 | 637 | s->sock->sk->sk_err = EUNATCH; |
8e87d142 | 638 | |
1da177e4 LT |
639 | /* Kill session thread */ |
640 | atomic_inc(&s->killed); | |
641 | wake_up_interruptible(s->sock->sk->sk_sleep); | |
642 | } else | |
643 | err = -ENOENT; | |
644 | ||
645 | up_read(&bnep_session_sem); | |
646 | return err; | |
647 | } | |
648 | ||
649 | static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s) | |
650 | { | |
651 | memcpy(ci->dst, s->eh.h_source, ETH_ALEN); | |
652 | strcpy(ci->device, s->dev->name); | |
653 | ci->flags = s->flags; | |
654 | ci->state = s->state; | |
655 | ci->role = s->role; | |
656 | } | |
657 | ||
658 | int bnep_get_connlist(struct bnep_connlist_req *req) | |
659 | { | |
660 | struct list_head *p; | |
661 | int err = 0, n = 0; | |
662 | ||
663 | down_read(&bnep_session_sem); | |
664 | ||
665 | list_for_each(p, &bnep_session_list) { | |
666 | struct bnep_session *s; | |
667 | struct bnep_conninfo ci; | |
668 | ||
669 | s = list_entry(p, struct bnep_session, list); | |
670 | ||
671 | __bnep_copy_ci(&ci, s); | |
8e87d142 | 672 | |
1da177e4 LT |
673 | if (copy_to_user(req->ci, &ci, sizeof(ci))) { |
674 | err = -EFAULT; | |
675 | break; | |
676 | } | |
677 | ||
678 | if (++n >= req->cnum) | |
679 | break; | |
680 | ||
681 | req->ci++; | |
682 | } | |
683 | req->cnum = n; | |
684 | ||
685 | up_read(&bnep_session_sem); | |
686 | return err; | |
687 | } | |
688 | ||
689 | int bnep_get_conninfo(struct bnep_conninfo *ci) | |
690 | { | |
691 | struct bnep_session *s; | |
692 | int err = 0; | |
693 | ||
694 | down_read(&bnep_session_sem); | |
695 | ||
696 | s = __bnep_get_session(ci->dst); | |
697 | if (s) | |
698 | __bnep_copy_ci(ci, s); | |
699 | else | |
700 | err = -ENOENT; | |
701 | ||
702 | up_read(&bnep_session_sem); | |
703 | return err; | |
704 | } | |
705 | ||
706 | static int __init bnep_init(void) | |
8e87d142 | 707 | { |
1da177e4 LT |
708 | char flt[50] = ""; |
709 | ||
710 | l2cap_load(); | |
711 | ||
712 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
713 | strcat(flt, "protocol "); | |
714 | #endif | |
715 | ||
716 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
717 | strcat(flt, "multicast"); | |
718 | #endif | |
719 | ||
720 | BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION); | |
721 | if (flt[0]) | |
722 | BT_INFO("BNEP filters: %s", flt); | |
723 | ||
724 | bnep_sock_init(); | |
725 | return 0; | |
726 | } | |
727 | ||
728 | static void __exit bnep_exit(void) | |
729 | { | |
730 | bnep_sock_cleanup(); | |
731 | } | |
732 | ||
733 | module_init(bnep_init); | |
734 | module_exit(bnep_exit); | |
735 | ||
28111eb2 MH |
736 | module_param(compress_src, bool, 0644); |
737 | MODULE_PARM_DESC(compress_src, "Compress sources headers"); | |
738 | ||
739 | module_param(compress_dst, bool, 0644); | |
740 | MODULE_PARM_DESC(compress_dst, "Compress destination headers"); | |
741 | ||
63fbd24e | 742 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
743 | MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION); |
744 | MODULE_VERSION(VERSION); | |
745 | MODULE_LICENSE("GPL"); | |
746 | MODULE_ALIAS("bt-proto-4"); |