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 | 28 | #include <linux/module.h> |
f4d7cd4a | 29 | #include <linux/kthread.h> |
1da177e4 | 30 | #include <linux/file.h> |
1da177e4 | 31 | #include <linux/etherdevice.h> |
1da177e4 LT |
32 | #include <asm/unaligned.h> |
33 | ||
34 | #include <net/bluetooth/bluetooth.h> | |
65f53e98 | 35 | #include <net/bluetooth/l2cap.h> |
0a85b964 | 36 | #include <net/bluetooth/hci_core.h> |
1da177e4 LT |
37 | |
38 | #include "bnep.h" | |
39 | ||
28111eb2 MH |
40 | #define VERSION "1.3" |
41 | ||
eb939922 RR |
42 | static bool compress_src = true; |
43 | static bool compress_dst = true; | |
1da177e4 LT |
44 | |
45 | static LIST_HEAD(bnep_session_list); | |
46 | static DECLARE_RWSEM(bnep_session_sem); | |
47 | ||
48 | static struct bnep_session *__bnep_get_session(u8 *dst) | |
49 | { | |
50 | struct bnep_session *s; | |
1da177e4 LT |
51 | |
52 | BT_DBG(""); | |
53 | ||
8035ded4 | 54 | list_for_each_entry(s, &bnep_session_list, list) |
c47fc981 | 55 | if (ether_addr_equal(dst, s->eh.h_source)) |
1da177e4 | 56 | return s; |
8035ded4 | 57 | |
1da177e4 LT |
58 | return NULL; |
59 | } | |
60 | ||
61 | static void __bnep_link_session(struct bnep_session *s) | |
62 | { | |
8e87d142 | 63 | list_add(&s->list, &bnep_session_list); |
1da177e4 LT |
64 | } |
65 | ||
66 | static void __bnep_unlink_session(struct bnep_session *s) | |
67 | { | |
68 | list_del(&s->list); | |
1da177e4 LT |
69 | } |
70 | ||
71 | static int bnep_send(struct bnep_session *s, void *data, size_t len) | |
72 | { | |
73 | struct socket *sock = s->sock; | |
74 | struct kvec iv = { data, len }; | |
75 | ||
76 | return kernel_sendmsg(sock, &s->msg, &iv, 1, len); | |
77 | } | |
78 | ||
79 | static int bnep_send_rsp(struct bnep_session *s, u8 ctrl, u16 resp) | |
80 | { | |
81 | struct bnep_control_rsp rsp; | |
82 | rsp.type = BNEP_CONTROL; | |
83 | rsp.ctrl = ctrl; | |
84 | rsp.resp = htons(resp); | |
85 | return bnep_send(s, &rsp, sizeof(rsp)); | |
86 | } | |
87 | ||
88 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
89 | static inline void bnep_set_default_proto_filter(struct bnep_session *s) | |
90 | { | |
91 | /* (IPv4, ARP) */ | |
e41d2169 AV |
92 | s->proto_filter[0].start = ETH_P_IP; |
93 | s->proto_filter[0].end = ETH_P_ARP; | |
1da177e4 | 94 | /* (RARP, AppleTalk) */ |
e41d2169 AV |
95 | s->proto_filter[1].start = ETH_P_RARP; |
96 | s->proto_filter[1].end = ETH_P_AARP; | |
1da177e4 | 97 | /* (IPX, IPv6) */ |
e41d2169 AV |
98 | s->proto_filter[2].start = ETH_P_IPX; |
99 | s->proto_filter[2].end = ETH_P_IPV6; | |
1da177e4 LT |
100 | } |
101 | #endif | |
102 | ||
1bc5d448 | 103 | static int bnep_ctrl_set_netfilter(struct bnep_session *s, __be16 *data, int len) |
1da177e4 LT |
104 | { |
105 | int n; | |
106 | ||
107 | if (len < 2) | |
108 | return -EILSEQ; | |
109 | ||
83985319 | 110 | n = get_unaligned_be16(data); |
3aad75a1 SJ |
111 | data++; |
112 | len -= 2; | |
1da177e4 LT |
113 | |
114 | if (len < n) | |
115 | return -EILSEQ; | |
116 | ||
117 | BT_DBG("filter len %d", n); | |
118 | ||
119 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
120 | n /= 4; | |
121 | if (n <= BNEP_MAX_PROTO_FILTERS) { | |
122 | struct bnep_proto_filter *f = s->proto_filter; | |
123 | int i; | |
124 | ||
125 | for (i = 0; i < n; i++) { | |
83985319 HH |
126 | f[i].start = get_unaligned_be16(data++); |
127 | f[i].end = get_unaligned_be16(data++); | |
1da177e4 LT |
128 | |
129 | BT_DBG("proto filter start %d end %d", | |
130 | f[i].start, f[i].end); | |
131 | } | |
132 | ||
133 | if (i < BNEP_MAX_PROTO_FILTERS) | |
134 | memset(f + i, 0, sizeof(*f)); | |
135 | ||
136 | if (n == 0) | |
137 | bnep_set_default_proto_filter(s); | |
138 | ||
139 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_SUCCESS); | |
140 | } else { | |
141 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_LIMIT_REACHED); | |
142 | } | |
143 | #else | |
144 | bnep_send_rsp(s, BNEP_FILTER_NET_TYPE_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
145 | #endif | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static int bnep_ctrl_set_mcfilter(struct bnep_session *s, u8 *data, int len) | |
150 | { | |
151 | int n; | |
152 | ||
153 | if (len < 2) | |
154 | return -EILSEQ; | |
155 | ||
83985319 | 156 | n = get_unaligned_be16(data); |
3aad75a1 SJ |
157 | data += 2; |
158 | len -= 2; | |
1da177e4 LT |
159 | |
160 | if (len < n) | |
161 | return -EILSEQ; | |
162 | ||
163 | BT_DBG("filter len %d", n); | |
164 | ||
165 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
166 | n /= (ETH_ALEN * 2); | |
167 | ||
168 | if (n > 0) { | |
a3d9bd4c SJ |
169 | int i; |
170 | ||
1da177e4 LT |
171 | s->mc_filter = 0; |
172 | ||
173 | /* Always send broadcast */ | |
174 | set_bit(bnep_mc_hash(s->dev->broadcast), (ulong *) &s->mc_filter); | |
175 | ||
176 | /* Add address ranges to the multicast hash */ | |
177 | for (; n > 0; n--) { | |
178 | u8 a1[6], *a2; | |
179 | ||
3aad75a1 SJ |
180 | memcpy(a1, data, ETH_ALEN); |
181 | data += ETH_ALEN; | |
182 | a2 = data; | |
183 | data += ETH_ALEN; | |
8e87d142 | 184 | |
6ed93dc6 | 185 | BT_DBG("mc filter %pMR -> %pMR", a1, a2); |
1da177e4 | 186 | |
1da177e4 LT |
187 | /* Iterate from a1 to a2 */ |
188 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); | |
189 | while (memcmp(a1, a2, 6) < 0 && s->mc_filter != ~0LL) { | |
a3d9bd4c SJ |
190 | /* Increment a1 */ |
191 | i = 5; | |
192 | while (i >= 0 && ++a1[i--] == 0) | |
193 | ; | |
194 | ||
1da177e4 LT |
195 | set_bit(bnep_mc_hash(a1), (ulong *) &s->mc_filter); |
196 | } | |
197 | } | |
198 | } | |
199 | ||
200 | BT_DBG("mc filter hash 0x%llx", s->mc_filter); | |
201 | ||
202 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_SUCCESS); | |
203 | #else | |
204 | bnep_send_rsp(s, BNEP_FILTER_MULTI_ADDR_RSP, BNEP_FILTER_UNSUPPORTED_REQ); | |
205 | #endif | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static int bnep_rx_control(struct bnep_session *s, void *data, int len) | |
210 | { | |
211 | u8 cmd = *(u8 *)data; | |
212 | int err = 0; | |
213 | ||
3aad75a1 SJ |
214 | data++; |
215 | len--; | |
1da177e4 LT |
216 | |
217 | switch (cmd) { | |
218 | case BNEP_CMD_NOT_UNDERSTOOD: | |
1da177e4 LT |
219 | case BNEP_SETUP_CONN_RSP: |
220 | case BNEP_FILTER_NET_TYPE_RSP: | |
221 | case BNEP_FILTER_MULTI_ADDR_RSP: | |
222 | /* Ignore these for now */ | |
223 | break; | |
224 | ||
225 | case BNEP_FILTER_NET_TYPE_SET: | |
226 | err = bnep_ctrl_set_netfilter(s, data, len); | |
227 | break; | |
228 | ||
229 | case BNEP_FILTER_MULTI_ADDR_SET: | |
230 | err = bnep_ctrl_set_mcfilter(s, data, len); | |
231 | break; | |
232 | ||
cde9f807 | 233 | case BNEP_SETUP_CONN_REQ: |
836a061b GK |
234 | /* Successful response should be sent only once */ |
235 | if (test_bit(BNEP_SETUP_RESPONSE, &s->flags) && | |
236 | !test_and_set_bit(BNEP_SETUP_RSP_SENT, &s->flags)) | |
237 | err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP, | |
238 | BNEP_SUCCESS); | |
239 | else | |
240 | err = bnep_send_rsp(s, BNEP_SETUP_CONN_RSP, | |
241 | BNEP_CONN_NOT_ALLOWED); | |
cde9f807 VK |
242 | break; |
243 | ||
1da177e4 LT |
244 | default: { |
245 | u8 pkt[3]; | |
246 | pkt[0] = BNEP_CONTROL; | |
247 | pkt[1] = BNEP_CMD_NOT_UNDERSTOOD; | |
248 | pkt[2] = cmd; | |
e0fdbab1 | 249 | err = bnep_send(s, pkt, sizeof(pkt)); |
1da177e4 LT |
250 | } |
251 | break; | |
252 | } | |
253 | ||
254 | return err; | |
255 | } | |
256 | ||
257 | static int bnep_rx_extension(struct bnep_session *s, struct sk_buff *skb) | |
258 | { | |
259 | struct bnep_ext_hdr *h; | |
260 | int err = 0; | |
261 | ||
262 | do { | |
263 | h = (void *) skb->data; | |
264 | if (!skb_pull(skb, sizeof(*h))) { | |
265 | err = -EILSEQ; | |
266 | break; | |
267 | } | |
268 | ||
269 | BT_DBG("type 0x%x len %d", h->type, h->len); | |
8e87d142 | 270 | |
1da177e4 LT |
271 | switch (h->type & BNEP_TYPE_MASK) { |
272 | case BNEP_EXT_CONTROL: | |
273 | bnep_rx_control(s, skb->data, skb->len); | |
274 | break; | |
275 | ||
276 | default: | |
277 | /* Unknown extension, skip it. */ | |
278 | break; | |
279 | } | |
280 | ||
281 | if (!skb_pull(skb, h->len)) { | |
282 | err = -EILSEQ; | |
283 | break; | |
284 | } | |
285 | } while (!err && (h->type & BNEP_EXT_HEADER)); | |
8e87d142 | 286 | |
1da177e4 LT |
287 | return err; |
288 | } | |
289 | ||
290 | static u8 __bnep_rx_hlen[] = { | |
291 | ETH_HLEN, /* BNEP_GENERAL */ | |
292 | 0, /* BNEP_CONTROL */ | |
293 | 2, /* BNEP_COMPRESSED */ | |
294 | ETH_ALEN + 2, /* BNEP_COMPRESSED_SRC_ONLY */ | |
295 | ETH_ALEN + 2 /* BNEP_COMPRESSED_DST_ONLY */ | |
296 | }; | |
1da177e4 | 297 | |
6039aa73 | 298 | static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) |
1da177e4 LT |
299 | { |
300 | struct net_device *dev = s->dev; | |
301 | struct sk_buff *nskb; | |
bf8b9a9c | 302 | u8 type, ctrl_type; |
1da177e4 | 303 | |
b4d7f0a4 | 304 | dev->stats.rx_bytes += skb->len; |
1da177e4 | 305 | |
3aad75a1 SJ |
306 | type = *(u8 *) skb->data; |
307 | skb_pull(skb, 1); | |
bf8b9a9c | 308 | ctrl_type = *(u8 *)skb->data; |
1da177e4 | 309 | |
a3d9bd4c | 310 | if ((type & BNEP_TYPE_MASK) >= sizeof(__bnep_rx_hlen)) |
1da177e4 | 311 | goto badframe; |
8e87d142 | 312 | |
1da177e4 | 313 | if ((type & BNEP_TYPE_MASK) == BNEP_CONTROL) { |
bf8b9a9c GK |
314 | if (bnep_rx_control(s, skb->data, skb->len) < 0) { |
315 | dev->stats.tx_errors++; | |
316 | kfree_skb(skb); | |
317 | return 0; | |
318 | } | |
1da177e4 | 319 | |
bf8b9a9c GK |
320 | if (!(type & BNEP_EXT_HEADER)) { |
321 | kfree_skb(skb); | |
322 | return 0; | |
323 | } | |
1da177e4 | 324 | |
bf8b9a9c GK |
325 | /* Verify and pull ctrl message since it's already processed */ |
326 | switch (ctrl_type) { | |
327 | case BNEP_SETUP_CONN_REQ: | |
328 | /* Pull: ctrl type (1 b), len (1 b), data (len bytes) */ | |
329 | if (!skb_pull(skb, 2 + *(u8 *)(skb->data + 1) * 2)) | |
330 | goto badframe; | |
331 | break; | |
332 | case BNEP_FILTER_MULTI_ADDR_SET: | |
333 | case BNEP_FILTER_NET_TYPE_SET: | |
334 | /* Pull: ctrl type (1 b), len (2 b), data (len bytes) */ | |
335 | if (!skb_pull(skb, 3 + *(u16 *)(skb->data + 1) * 2)) | |
336 | goto badframe; | |
337 | break; | |
338 | default: | |
339 | kfree_skb(skb); | |
340 | return 0; | |
341 | } | |
342 | } else { | |
343 | skb_reset_mac_header(skb); | |
344 | ||
345 | /* Verify and pull out header */ | |
346 | if (!skb_pull(skb, __bnep_rx_hlen[type & BNEP_TYPE_MASK])) | |
347 | goto badframe; | |
1da177e4 | 348 | |
bf8b9a9c GK |
349 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
350 | } | |
1da177e4 LT |
351 | |
352 | if (type & BNEP_EXT_HEADER) { | |
353 | if (bnep_rx_extension(s, skb) < 0) | |
354 | goto badframe; | |
355 | } | |
356 | ||
357 | /* Strip 802.1p header */ | |
000092b0 | 358 | if (ntohs(s->eh.h_proto) == ETH_P_8021Q) { |
1da177e4 LT |
359 | if (!skb_pull(skb, 4)) |
360 | goto badframe; | |
1bc5d448 | 361 | s->eh.h_proto = get_unaligned((__be16 *) (skb->data - 2)); |
1da177e4 | 362 | } |
8e87d142 | 363 | |
1da177e4 LT |
364 | /* We have to alloc new skb and copy data here :(. Because original skb |
365 | * may not be modified and because of the alignment requirements. */ | |
366 | nskb = alloc_skb(2 + ETH_HLEN + skb->len, GFP_KERNEL); | |
367 | if (!nskb) { | |
b4d7f0a4 | 368 | dev->stats.rx_dropped++; |
1da177e4 LT |
369 | kfree_skb(skb); |
370 | return -ENOMEM; | |
371 | } | |
372 | skb_reserve(nskb, 2); | |
373 | ||
374 | /* Decompress header and construct ether frame */ | |
375 | switch (type & BNEP_TYPE_MASK) { | |
376 | case BNEP_COMPRESSED: | |
377 | memcpy(__skb_put(nskb, ETH_HLEN), &s->eh, ETH_HLEN); | |
378 | break; | |
8e87d142 | 379 | |
1da177e4 LT |
380 | case BNEP_COMPRESSED_SRC_ONLY: |
381 | memcpy(__skb_put(nskb, ETH_ALEN), s->eh.h_dest, ETH_ALEN); | |
98e399f8 | 382 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), ETH_ALEN); |
1bc5d448 | 383 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
384 | break; |
385 | ||
386 | case BNEP_COMPRESSED_DST_ONLY: | |
98e399f8 | 387 | memcpy(__skb_put(nskb, ETH_ALEN), skb_mac_header(skb), |
3aad75a1 | 388 | ETH_ALEN); |
98e399f8 | 389 | memcpy(__skb_put(nskb, ETH_ALEN + 2), s->eh.h_source, |
3aad75a1 | 390 | ETH_ALEN + 2); |
1da177e4 LT |
391 | break; |
392 | ||
393 | case BNEP_GENERAL: | |
98e399f8 | 394 | memcpy(__skb_put(nskb, ETH_ALEN * 2), skb_mac_header(skb), |
3aad75a1 | 395 | ETH_ALEN * 2); |
1bc5d448 | 396 | put_unaligned(s->eh.h_proto, (__be16 *) __skb_put(nskb, 2)); |
1da177e4 LT |
397 | break; |
398 | } | |
399 | ||
d626f62b | 400 | skb_copy_from_linear_data(skb, __skb_put(nskb, skb->len), skb->len); |
1da177e4 | 401 | kfree_skb(skb); |
8e87d142 | 402 | |
b4d7f0a4 | 403 | dev->stats.rx_packets++; |
1da177e4 LT |
404 | nskb->ip_summed = CHECKSUM_NONE; |
405 | nskb->protocol = eth_type_trans(nskb, dev); | |
406 | netif_rx_ni(nskb); | |
407 | return 0; | |
408 | ||
409 | badframe: | |
b4d7f0a4 | 410 | dev->stats.rx_errors++; |
1da177e4 LT |
411 | kfree_skb(skb); |
412 | return 0; | |
413 | } | |
414 | ||
415 | static u8 __bnep_tx_types[] = { | |
416 | BNEP_GENERAL, | |
417 | BNEP_COMPRESSED_SRC_ONLY, | |
418 | BNEP_COMPRESSED_DST_ONLY, | |
419 | BNEP_COMPRESSED | |
420 | }; | |
421 | ||
6039aa73 | 422 | static int bnep_tx_frame(struct bnep_session *s, struct sk_buff *skb) |
1da177e4 LT |
423 | { |
424 | struct ethhdr *eh = (void *) skb->data; | |
425 | struct socket *sock = s->sock; | |
426 | struct kvec iv[3]; | |
427 | int len = 0, il = 0; | |
428 | u8 type = 0; | |
429 | ||
430 | BT_DBG("skb %p dev %p type %d", skb, skb->dev, skb->pkt_type); | |
431 | ||
432 | if (!skb->dev) { | |
433 | /* Control frame sent by us */ | |
434 | goto send; | |
435 | } | |
436 | ||
437 | iv[il++] = (struct kvec) { &type, 1 }; | |
438 | len++; | |
439 | ||
c47fc981 | 440 | if (compress_src && ether_addr_equal(eh->h_dest, s->eh.h_source)) |
1da177e4 LT |
441 | type |= 0x01; |
442 | ||
c47fc981 | 443 | if (compress_dst && ether_addr_equal(eh->h_source, s->eh.h_dest)) |
1da177e4 LT |
444 | type |= 0x02; |
445 | ||
446 | if (type) | |
447 | skb_pull(skb, ETH_ALEN * 2); | |
448 | ||
449 | type = __bnep_tx_types[type]; | |
450 | switch (type) { | |
451 | case BNEP_COMPRESSED_SRC_ONLY: | |
452 | iv[il++] = (struct kvec) { eh->h_source, ETH_ALEN }; | |
453 | len += ETH_ALEN; | |
454 | break; | |
8e87d142 | 455 | |
1da177e4 LT |
456 | case BNEP_COMPRESSED_DST_ONLY: |
457 | iv[il++] = (struct kvec) { eh->h_dest, ETH_ALEN }; | |
458 | len += ETH_ALEN; | |
459 | break; | |
460 | } | |
461 | ||
462 | send: | |
463 | iv[il++] = (struct kvec) { skb->data, skb->len }; | |
464 | len += skb->len; | |
8e87d142 | 465 | |
1da177e4 LT |
466 | /* FIXME: linearize skb */ |
467 | { | |
468 | len = kernel_sendmsg(sock, &s->msg, iv, il, len); | |
469 | } | |
470 | kfree_skb(skb); | |
471 | ||
472 | if (len > 0) { | |
b4d7f0a4 SH |
473 | s->dev->stats.tx_bytes += len; |
474 | s->dev->stats.tx_packets++; | |
1da177e4 LT |
475 | return 0; |
476 | } | |
477 | ||
478 | return len; | |
479 | } | |
480 | ||
481 | static int bnep_session(void *arg) | |
482 | { | |
483 | struct bnep_session *s = arg; | |
484 | struct net_device *dev = s->dev; | |
485 | struct sock *sk = s->sock->sk; | |
486 | struct sk_buff *skb; | |
487 | wait_queue_t wait; | |
488 | ||
489 | BT_DBG(""); | |
490 | ||
1da177e4 | 491 | set_user_nice(current, -15); |
1da177e4 LT |
492 | |
493 | init_waitqueue_entry(&wait, current); | |
aa395145 | 494 | add_wait_queue(sk_sleep(sk), &wait); |
38d57555 | 495 | while (1) { |
1da177e4 LT |
496 | set_current_state(TASK_INTERRUPTIBLE); |
497 | ||
751c10a5 | 498 | if (atomic_read(&s->terminate)) |
38d57555 | 499 | break; |
3aad75a1 | 500 | /* RX */ |
1da177e4 LT |
501 | while ((skb = skb_dequeue(&sk->sk_receive_queue))) { |
502 | skb_orphan(skb); | |
44935720 MM |
503 | if (!skb_linearize(skb)) |
504 | bnep_rx_frame(s, skb); | |
505 | else | |
506 | kfree_skb(skb); | |
1da177e4 LT |
507 | } |
508 | ||
509 | if (sk->sk_state != BT_CONNECTED) | |
510 | break; | |
8e87d142 | 511 | |
3aad75a1 | 512 | /* TX */ |
1da177e4 LT |
513 | while ((skb = skb_dequeue(&sk->sk_write_queue))) |
514 | if (bnep_tx_frame(s, skb)) | |
515 | break; | |
516 | netif_wake_queue(dev); | |
8e87d142 | 517 | |
1da177e4 LT |
518 | schedule(); |
519 | } | |
38d57555 | 520 | __set_current_state(TASK_RUNNING); |
aa395145 | 521 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
522 | |
523 | /* Cleanup session */ | |
524 | down_write(&bnep_session_sem); | |
525 | ||
526 | /* Delete network device */ | |
527 | unregister_netdev(dev); | |
528 | ||
ec8dab36 MH |
529 | /* Wakeup user-space polling for socket errors */ |
530 | s->sock->sk->sk_err = EUNATCH; | |
531 | ||
aa395145 | 532 | wake_up_interruptible(sk_sleep(s->sock->sk)); |
ec8dab36 | 533 | |
1da177e4 LT |
534 | /* Release the socket */ |
535 | fput(s->sock->file); | |
536 | ||
537 | __bnep_unlink_session(s); | |
538 | ||
539 | up_write(&bnep_session_sem); | |
540 | free_netdev(dev); | |
9b338c3d | 541 | module_put_and_exit(0); |
1da177e4 LT |
542 | return 0; |
543 | } | |
544 | ||
0a85b964 MH |
545 | static struct device *bnep_get_device(struct bnep_session *session) |
546 | { | |
88d9077c | 547 | struct l2cap_conn *conn = l2cap_pi(session->sock->sk)->chan->conn; |
0a85b964 | 548 | |
88d9077c | 549 | if (!conn || !conn->hcon) |
0a85b964 MH |
550 | return NULL; |
551 | ||
88d9077c | 552 | return &conn->hcon->dev; |
0a85b964 MH |
553 | } |
554 | ||
384912ed MH |
555 | static struct device_type bnep_type = { |
556 | .name = "bluetooth", | |
557 | }; | |
558 | ||
1da177e4 LT |
559 | int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock) |
560 | { | |
836a061b | 561 | u32 valid_flags = BIT(BNEP_SETUP_RESPONSE); |
1da177e4 LT |
562 | struct net_device *dev; |
563 | struct bnep_session *s, *ss; | |
564 | u8 dst[ETH_ALEN], src[ETH_ALEN]; | |
565 | int err; | |
566 | ||
567 | BT_DBG(""); | |
568 | ||
71bb99a0 AV |
569 | if (!l2cap_is_socket(sock)) |
570 | return -EBADFD; | |
571 | ||
0151e426 MH |
572 | if (req->flags & ~valid_flags) |
573 | return -EINVAL; | |
574 | ||
65f53e98 MH |
575 | baswap((void *) dst, &l2cap_pi(sock->sk)->chan->dst); |
576 | baswap((void *) src, &l2cap_pi(sock->sk)->chan->src); | |
1da177e4 LT |
577 | |
578 | /* session struct allocated as private part of net_device */ | |
579 | dev = alloc_netdev(sizeof(struct bnep_session), | |
c835a677 TG |
580 | (*req->device) ? req->device : "bnep%d", |
581 | NET_NAME_UNKNOWN, | |
582 | bnep_net_setup); | |
67b52e55 TK |
583 | if (!dev) |
584 | return -ENOMEM; | |
1da177e4 | 585 | |
1da177e4 LT |
586 | down_write(&bnep_session_sem); |
587 | ||
588 | ss = __bnep_get_session(dst); | |
589 | if (ss && ss->state == BT_CONNECTED) { | |
590 | err = -EEXIST; | |
591 | goto failed; | |
592 | } | |
593 | ||
524ad0a7 | 594 | s = netdev_priv(dev); |
1da177e4 LT |
595 | |
596 | /* This is rx header therefore addresses are swapped. | |
3aad75a1 | 597 | * ie. eh.h_dest is our local address. */ |
1da177e4 LT |
598 | memcpy(s->eh.h_dest, &src, ETH_ALEN); |
599 | memcpy(s->eh.h_source, &dst, ETH_ALEN); | |
600 | memcpy(dev->dev_addr, s->eh.h_dest, ETH_ALEN); | |
601 | ||
0a85b964 | 602 | s->dev = dev; |
1da177e4 LT |
603 | s->sock = sock; |
604 | s->role = req->role; | |
605 | s->state = BT_CONNECTED; | |
836a061b | 606 | s->flags = req->flags; |
8e87d142 | 607 | |
1da177e4 LT |
608 | s->msg.msg_flags = MSG_NOSIGNAL; |
609 | ||
610 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
4ada1282 DS |
611 | /* Set default mc filter to not filter out any mc addresses |
612 | * as defined in the BNEP specification (revision 0.95a) | |
613 | * http://grouper.ieee.org/groups/802/15/Bluetooth/BNEP.pdf | |
614 | */ | |
615 | s->mc_filter = ~0LL; | |
1da177e4 LT |
616 | #endif |
617 | ||
618 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER | |
619 | /* Set default protocol filter */ | |
620 | bnep_set_default_proto_filter(s); | |
621 | #endif | |
622 | ||
0a85b964 | 623 | SET_NETDEV_DEV(dev, bnep_get_device(s)); |
384912ed | 624 | SET_NETDEV_DEVTYPE(dev, &bnep_type); |
0a85b964 | 625 | |
1da177e4 | 626 | err = register_netdev(dev); |
3aad75a1 | 627 | if (err) |
1da177e4 | 628 | goto failed; |
1da177e4 LT |
629 | |
630 | __bnep_link_session(s); | |
8e87d142 | 631 | |
9b338c3d | 632 | __module_get(THIS_MODULE); |
f4d7cd4a SJ |
633 | s->task = kthread_run(bnep_session, s, "kbnepd %s", dev->name); |
634 | if (IS_ERR(s->task)) { | |
1da177e4 | 635 | /* Session thread start failed, gotta cleanup. */ |
9b338c3d | 636 | module_put(THIS_MODULE); |
1da177e4 LT |
637 | unregister_netdev(dev); |
638 | __bnep_unlink_session(s); | |
f4d7cd4a | 639 | err = PTR_ERR(s->task); |
1da177e4 LT |
640 | goto failed; |
641 | } | |
642 | ||
643 | up_write(&bnep_session_sem); | |
644 | strcpy(req->device, dev->name); | |
645 | return 0; | |
646 | ||
647 | failed: | |
648 | up_write(&bnep_session_sem); | |
649 | free_netdev(dev); | |
650 | return err; | |
651 | } | |
652 | ||
653 | int bnep_del_connection(struct bnep_conndel_req *req) | |
654 | { | |
0151e426 | 655 | u32 valid_flags = 0; |
1da177e4 LT |
656 | struct bnep_session *s; |
657 | int err = 0; | |
658 | ||
659 | BT_DBG(""); | |
660 | ||
0151e426 MH |
661 | if (req->flags & ~valid_flags) |
662 | return -EINVAL; | |
663 | ||
1da177e4 LT |
664 | down_read(&bnep_session_sem); |
665 | ||
666 | s = __bnep_get_session(req->dst); | |
751c10a5 PH |
667 | if (s) { |
668 | atomic_inc(&s->terminate); | |
669 | wake_up_process(s->task); | |
670 | } else | |
1da177e4 LT |
671 | err = -ENOENT; |
672 | ||
673 | up_read(&bnep_session_sem); | |
674 | return err; | |
675 | } | |
676 | ||
677 | static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s) | |
678 | { | |
836a061b | 679 | u32 valid_flags = BIT(BNEP_SETUP_RESPONSE); |
0151e426 | 680 | |
5520d20f | 681 | memset(ci, 0, sizeof(*ci)); |
1da177e4 LT |
682 | memcpy(ci->dst, s->eh.h_source, ETH_ALEN); |
683 | strcpy(ci->device, s->dev->name); | |
0151e426 | 684 | ci->flags = s->flags & valid_flags; |
1da177e4 LT |
685 | ci->state = s->state; |
686 | ci->role = s->role; | |
687 | } | |
688 | ||
689 | int bnep_get_connlist(struct bnep_connlist_req *req) | |
690 | { | |
8035ded4 | 691 | struct bnep_session *s; |
1da177e4 LT |
692 | int err = 0, n = 0; |
693 | ||
694 | down_read(&bnep_session_sem); | |
695 | ||
8035ded4 | 696 | list_for_each_entry(s, &bnep_session_list, list) { |
1da177e4 LT |
697 | struct bnep_conninfo ci; |
698 | ||
1da177e4 | 699 | __bnep_copy_ci(&ci, s); |
8e87d142 | 700 | |
1da177e4 LT |
701 | if (copy_to_user(req->ci, &ci, sizeof(ci))) { |
702 | err = -EFAULT; | |
703 | break; | |
704 | } | |
705 | ||
706 | if (++n >= req->cnum) | |
707 | break; | |
708 | ||
709 | req->ci++; | |
710 | } | |
711 | req->cnum = n; | |
712 | ||
713 | up_read(&bnep_session_sem); | |
714 | return err; | |
715 | } | |
716 | ||
717 | int bnep_get_conninfo(struct bnep_conninfo *ci) | |
718 | { | |
719 | struct bnep_session *s; | |
720 | int err = 0; | |
721 | ||
722 | down_read(&bnep_session_sem); | |
723 | ||
724 | s = __bnep_get_session(ci->dst); | |
725 | if (s) | |
726 | __bnep_copy_ci(ci, s); | |
727 | else | |
728 | err = -ENOENT; | |
729 | ||
730 | up_read(&bnep_session_sem); | |
731 | return err; | |
732 | } | |
733 | ||
734 | static int __init bnep_init(void) | |
8e87d142 | 735 | { |
1da177e4 LT |
736 | char flt[50] = ""; |
737 | ||
1da177e4 LT |
738 | #ifdef CONFIG_BT_BNEP_PROTO_FILTER |
739 | strcat(flt, "protocol "); | |
740 | #endif | |
741 | ||
742 | #ifdef CONFIG_BT_BNEP_MC_FILTER | |
743 | strcat(flt, "multicast"); | |
744 | #endif | |
745 | ||
746 | BT_INFO("BNEP (Ethernet Emulation) ver %s", VERSION); | |
747 | if (flt[0]) | |
748 | BT_INFO("BNEP filters: %s", flt); | |
749 | ||
750 | bnep_sock_init(); | |
751 | return 0; | |
752 | } | |
753 | ||
754 | static void __exit bnep_exit(void) | |
755 | { | |
756 | bnep_sock_cleanup(); | |
757 | } | |
758 | ||
759 | module_init(bnep_init); | |
760 | module_exit(bnep_exit); | |
761 | ||
28111eb2 MH |
762 | module_param(compress_src, bool, 0644); |
763 | MODULE_PARM_DESC(compress_src, "Compress sources headers"); | |
764 | ||
765 | module_param(compress_dst, bool, 0644); | |
766 | MODULE_PARM_DESC(compress_dst, "Compress destination headers"); | |
767 | ||
63fbd24e | 768 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
769 | MODULE_DESCRIPTION("Bluetooth BNEP ver " VERSION); |
770 | MODULE_VERSION(VERSION); | |
771 | MODULE_LICENSE("GPL"); | |
772 | MODULE_ALIAS("bt-proto-4"); |