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-rw-r--r--drivers/uwb/wlp/messages.c1798
1 files changed, 0 insertions, 1798 deletions
diff --git a/drivers/uwb/wlp/messages.c b/drivers/uwb/wlp/messages.c
deleted file mode 100644
index 3a8e033dce21..000000000000
--- a/drivers/uwb/wlp/messages.c
+++ /dev/null
@@ -1,1798 +0,0 @@
1/*
2 * WiMedia Logical Link Control Protocol (WLP)
3 * Message construction and parsing
4 *
5 * Copyright (C) 2007 Intel Corporation
6 * Reinette Chatre <reinette.chatre@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version
10 * 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 * 02110-1301, USA.
21 *
22 *
23 * FIXME: docs
24 */
25
26#include <linux/wlp.h>
27#include <linux/slab.h>
28
29#include "wlp-internal.h"
30
31static
32const char *__wlp_assoc_frame[] = {
33 [WLP_ASSOC_D1] = "WLP_ASSOC_D1",
34 [WLP_ASSOC_D2] = "WLP_ASSOC_D2",
35 [WLP_ASSOC_M1] = "WLP_ASSOC_M1",
36 [WLP_ASSOC_M2] = "WLP_ASSOC_M2",
37 [WLP_ASSOC_M3] = "WLP_ASSOC_M3",
38 [WLP_ASSOC_M4] = "WLP_ASSOC_M4",
39 [WLP_ASSOC_M5] = "WLP_ASSOC_M5",
40 [WLP_ASSOC_M6] = "WLP_ASSOC_M6",
41 [WLP_ASSOC_M7] = "WLP_ASSOC_M7",
42 [WLP_ASSOC_M8] = "WLP_ASSOC_M8",
43 [WLP_ASSOC_F0] = "WLP_ASSOC_F0",
44 [WLP_ASSOC_E1] = "WLP_ASSOC_E1",
45 [WLP_ASSOC_E2] = "WLP_ASSOC_E2",
46 [WLP_ASSOC_C1] = "WLP_ASSOC_C1",
47 [WLP_ASSOC_C2] = "WLP_ASSOC_C2",
48 [WLP_ASSOC_C3] = "WLP_ASSOC_C3",
49 [WLP_ASSOC_C4] = "WLP_ASSOC_C4",
50};
51
52static const char *wlp_assoc_frame_str(unsigned id)
53{
54 if (id >= ARRAY_SIZE(__wlp_assoc_frame))
55 return "unknown association frame";
56 return __wlp_assoc_frame[id];
57}
58
59static const char *__wlp_assc_error[] = {
60 "none",
61 "Authenticator Failure",
62 "Rogue activity suspected",
63 "Device busy",
64 "Setup Locked",
65 "Registrar not ready",
66 "Invalid WSS selection",
67 "Message timeout",
68 "Enrollment session timeout",
69 "Device password invalid",
70 "Unsupported version",
71 "Internal error",
72 "Undefined error",
73 "Numeric comparison failure",
74 "Waiting for user input",
75};
76
77static const char *wlp_assc_error_str(unsigned id)
78{
79 if (id >= ARRAY_SIZE(__wlp_assc_error))
80 return "unknown WLP association error";
81 return __wlp_assc_error[id];
82}
83
84static inline void wlp_set_attr_hdr(struct wlp_attr_hdr *hdr, unsigned type,
85 size_t len)
86{
87 hdr->type = cpu_to_le16(type);
88 hdr->length = cpu_to_le16(len);
89}
90
91/*
92 * Populate fields of a constant sized attribute
93 *
94 * @returns: total size of attribute including size of new value
95 *
96 * We have two instances of this function (wlp_pset and wlp_set): one takes
97 * the value as a parameter, the other takes a pointer to the value as
98 * parameter. They thus only differ in how the value is assigned to the
99 * attribute.
100 *
101 * We use sizeof(*attr) - sizeof(struct wlp_attr_hdr) instead of
102 * sizeof(type) to be able to use this same code for the structures that
103 * contain 8bit enum values and be able to deal with pointer types.
104 */
105#define wlp_set(type, type_code, name) \
106static size_t wlp_set_##name(struct wlp_attr_##name *attr, type value) \
107{ \
108 wlp_set_attr_hdr(&attr->hdr, type_code, \
109 sizeof(*attr) - sizeof(struct wlp_attr_hdr)); \
110 attr->name = value; \
111 return sizeof(*attr); \
112}
113
114#define wlp_pset(type, type_code, name) \
115static size_t wlp_set_##name(struct wlp_attr_##name *attr, type value) \
116{ \
117 wlp_set_attr_hdr(&attr->hdr, type_code, \
118 sizeof(*attr) - sizeof(struct wlp_attr_hdr)); \
119 attr->name = *value; \
120 return sizeof(*attr); \
121}
122
123/**
124 * Populate fields of a variable attribute
125 *
126 * @returns: total size of attribute including size of new value
127 *
128 * Provided with a pointer to the memory area reserved for the
129 * attribute structure, the field is populated with the value. The
130 * reserved memory has to contain enough space for the value.
131 */
132#define wlp_vset(type, type_code, name) \
133static size_t wlp_set_##name(struct wlp_attr_##name *attr, type value, \
134 size_t len) \
135{ \
136 wlp_set_attr_hdr(&attr->hdr, type_code, len); \
137 memcpy(attr->name, value, len); \
138 return sizeof(*attr) + len; \
139}
140
141wlp_vset(char *, WLP_ATTR_DEV_NAME, dev_name)
142wlp_vset(char *, WLP_ATTR_MANUF, manufacturer)
143wlp_set(enum wlp_assoc_type, WLP_ATTR_MSG_TYPE, msg_type)
144wlp_vset(char *, WLP_ATTR_MODEL_NAME, model_name)
145wlp_vset(char *, WLP_ATTR_MODEL_NR, model_nr)
146wlp_vset(char *, WLP_ATTR_SERIAL, serial)
147wlp_vset(char *, WLP_ATTR_WSS_NAME, wss_name)
148wlp_pset(struct wlp_uuid *, WLP_ATTR_UUID_E, uuid_e)
149wlp_pset(struct wlp_uuid *, WLP_ATTR_UUID_R, uuid_r)
150wlp_pset(struct wlp_uuid *, WLP_ATTR_WSSID, wssid)
151wlp_pset(struct wlp_dev_type *, WLP_ATTR_PRI_DEV_TYPE, prim_dev_type)
152/*wlp_pset(struct wlp_dev_type *, WLP_ATTR_SEC_DEV_TYPE, sec_dev_type)*/
153wlp_set(u8, WLP_ATTR_WLP_VER, version)
154wlp_set(enum wlp_assc_error, WLP_ATTR_WLP_ASSC_ERR, wlp_assc_err)
155wlp_set(enum wlp_wss_sel_mthd, WLP_ATTR_WSS_SEL_MTHD, wss_sel_mthd)
156wlp_set(u8, WLP_ATTR_ACC_ENRL, accept_enrl)
157wlp_set(u8, WLP_ATTR_WSS_SEC_STAT, wss_sec_status)
158wlp_pset(struct uwb_mac_addr *, WLP_ATTR_WSS_BCAST, wss_bcast)
159wlp_pset(struct wlp_nonce *, WLP_ATTR_ENRL_NONCE, enonce)
160wlp_pset(struct wlp_nonce *, WLP_ATTR_REG_NONCE, rnonce)
161wlp_set(u8, WLP_ATTR_WSS_TAG, wss_tag)
162wlp_pset(struct uwb_mac_addr *, WLP_ATTR_WSS_VIRT, wss_virt)
163
164/**
165 * Fill in the WSS information attributes
166 *
167 * We currently only support one WSS, and this is assumed in this function
168 * that can populate only one WSS information attribute.
169 */
170static size_t wlp_set_wss_info(struct wlp_attr_wss_info *attr,
171 struct wlp_wss *wss)
172{
173 size_t datalen;
174 void *ptr = attr->wss_info;
175 size_t used = sizeof(*attr);
176
177 datalen = sizeof(struct wlp_wss_info) + strlen(wss->name);
178 wlp_set_attr_hdr(&attr->hdr, WLP_ATTR_WSS_INFO, datalen);
179 used = wlp_set_wssid(ptr, &wss->wssid);
180 used += wlp_set_wss_name(ptr + used, wss->name, strlen(wss->name));
181 used += wlp_set_accept_enrl(ptr + used, wss->accept_enroll);
182 used += wlp_set_wss_sec_status(ptr + used, wss->secure_status);
183 used += wlp_set_wss_bcast(ptr + used, &wss->bcast);
184 return sizeof(*attr) + used;
185}
186
187/**
188 * Verify attribute header
189 *
190 * @hdr: Pointer to attribute header that will be verified.
191 * @type: Expected attribute type.
192 * @len: Expected length of attribute value (excluding header).
193 *
194 * Most attribute values have a known length even when they do have a
195 * length field. This knowledge can be used via this function to verify
196 * that the length field matches the expected value.
197 */
198static int wlp_check_attr_hdr(struct wlp *wlp, struct wlp_attr_hdr *hdr,
199 enum wlp_attr_type type, unsigned len)
200{
201 struct device *dev = &wlp->rc->uwb_dev.dev;
202
203 if (le16_to_cpu(hdr->type) != type) {
204 dev_err(dev, "WLP: unexpected header type. Expected "
205 "%u, got %u.\n", type, le16_to_cpu(hdr->type));
206 return -EINVAL;
207 }
208 if (le16_to_cpu(hdr->length) != len) {
209 dev_err(dev, "WLP: unexpected length in header. Expected "
210 "%u, got %u.\n", len, le16_to_cpu(hdr->length));
211 return -EINVAL;
212 }
213 return 0;
214}
215
216/**
217 * Check if header of WSS information attribute valid
218 *
219 * @returns: length of WSS attributes (value of length attribute field) if
220 * valid WSS information attribute found
221 * -ENODATA if no WSS information attribute found
222 * -EIO other error occured
223 *
224 * The WSS information attribute is optional. The function will be provided
225 * with a pointer to data that could _potentially_ be a WSS information
226 * attribute. If a valid WSS information attribute is found it will return
227 * 0, if no WSS information attribute is found it will return -ENODATA, and
228 * another error will be returned if it is a WSS information attribute, but
229 * some parsing failure occured.
230 */
231static int wlp_check_wss_info_attr_hdr(struct wlp *wlp,
232 struct wlp_attr_hdr *hdr, size_t buflen)
233{
234 struct device *dev = &wlp->rc->uwb_dev.dev;
235 size_t len;
236 int result = 0;
237
238 if (buflen < sizeof(*hdr)) {
239 dev_err(dev, "WLP: Not enough space in buffer to parse"
240 " WSS information attribute header.\n");
241 result = -EIO;
242 goto out;
243 }
244 if (le16_to_cpu(hdr->type) != WLP_ATTR_WSS_INFO) {
245 /* WSS information is optional */
246 result = -ENODATA;
247 goto out;
248 }
249 len = le16_to_cpu(hdr->length);
250 if (buflen < sizeof(*hdr) + len) {
251 dev_err(dev, "WLP: Not enough space in buffer to parse "
252 "variable data. Got %d, expected %d.\n",
253 (int)buflen, (int)(sizeof(*hdr) + len));
254 result = -EIO;
255 goto out;
256 }
257 result = len;
258out:
259 return result;
260}
261
262
263static ssize_t wlp_get_attribute(struct wlp *wlp, u16 type_code,
264 struct wlp_attr_hdr *attr_hdr, void *value, ssize_t value_len,
265 ssize_t buflen)
266{
267 struct device *dev = &wlp->rc->uwb_dev.dev;
268 ssize_t attr_len = sizeof(*attr_hdr) + value_len;
269 if (buflen < 0)
270 return -EINVAL;
271 if (buflen < attr_len) {
272 dev_err(dev, "WLP: Not enough space in buffer to parse"
273 " attribute field. Need %d, received %zu\n",
274 (int)attr_len, buflen);
275 return -EIO;
276 }
277 if (wlp_check_attr_hdr(wlp, attr_hdr, type_code, value_len) < 0) {
278 dev_err(dev, "WLP: Header verification failed. \n");
279 return -EINVAL;
280 }
281 memcpy(value, (void *)attr_hdr + sizeof(*attr_hdr), value_len);
282 return attr_len;
283}
284
285static ssize_t wlp_vget_attribute(struct wlp *wlp, u16 type_code,
286 struct wlp_attr_hdr *attr_hdr, void *value, ssize_t max_value_len,
287 ssize_t buflen)
288{
289 struct device *dev = &wlp->rc->uwb_dev.dev;
290 size_t len;
291 if (buflen < 0)
292 return -EINVAL;
293 if (buflen < sizeof(*attr_hdr)) {
294 dev_err(dev, "WLP: Not enough space in buffer to parse"
295 " header.\n");
296 return -EIO;
297 }
298 if (le16_to_cpu(attr_hdr->type) != type_code) {
299 dev_err(dev, "WLP: Unexpected attribute type. Got %u, "
300 "expected %u.\n", le16_to_cpu(attr_hdr->type),
301 type_code);
302 return -EINVAL;
303 }
304 len = le16_to_cpu(attr_hdr->length);
305 if (len > max_value_len) {
306 dev_err(dev, "WLP: Attribute larger than maximum "
307 "allowed. Received %zu, max is %d.\n", len,
308 (int)max_value_len);
309 return -EFBIG;
310 }
311 if (buflen < sizeof(*attr_hdr) + len) {
312 dev_err(dev, "WLP: Not enough space in buffer to parse "
313 "variable data.\n");
314 return -EIO;
315 }
316 memcpy(value, (void *)attr_hdr + sizeof(*attr_hdr), len);
317 return sizeof(*attr_hdr) + len;
318}
319
320/**
321 * Get value of attribute from fixed size attribute field.
322 *
323 * @attr: Pointer to attribute field.
324 * @value: Pointer to variable in which attribute value will be placed.
325 * @buflen: Size of buffer in which attribute field (including header)
326 * can be found.
327 * @returns: Amount of given buffer consumed by parsing for this attribute.
328 *
329 * The size and type of the value is known by the type of the attribute.
330 */
331#define wlp_get(type, type_code, name) \
332ssize_t wlp_get_##name(struct wlp *wlp, struct wlp_attr_##name *attr, \
333 type *value, ssize_t buflen) \
334{ \
335 return wlp_get_attribute(wlp, (type_code), &attr->hdr, \
336 value, sizeof(*value), buflen); \
337}
338
339#define wlp_get_sparse(type, type_code, name) \
340 static wlp_get(type, type_code, name)
341
342/**
343 * Get value of attribute from variable sized attribute field.
344 *
345 * @max: The maximum size of this attribute. This value is dictated by
346 * the maximum value from the WLP specification.
347 *
348 * @attr: Pointer to attribute field.
349 * @value: Pointer to variable that will contain the value. The memory
350 * must already have been allocated for this value.
351 * @buflen: Size of buffer in which attribute field (including header)
352 * can be found.
353 * @returns: Amount of given bufferconsumed by parsing for this attribute.
354 */
355#define wlp_vget(type_val, type_code, name, max) \
356static ssize_t wlp_get_##name(struct wlp *wlp, \
357 struct wlp_attr_##name *attr, \
358 type_val *value, ssize_t buflen) \
359{ \
360 return wlp_vget_attribute(wlp, (type_code), &attr->hdr, \
361 value, (max), buflen); \
362}
363
364wlp_get(u8, WLP_ATTR_WLP_VER, version)
365wlp_get_sparse(enum wlp_wss_sel_mthd, WLP_ATTR_WSS_SEL_MTHD, wss_sel_mthd)
366wlp_get_sparse(struct wlp_dev_type, WLP_ATTR_PRI_DEV_TYPE, prim_dev_type)
367wlp_get_sparse(enum wlp_assc_error, WLP_ATTR_WLP_ASSC_ERR, wlp_assc_err)
368wlp_get_sparse(struct wlp_uuid, WLP_ATTR_UUID_E, uuid_e)
369wlp_get_sparse(struct wlp_uuid, WLP_ATTR_UUID_R, uuid_r)
370wlp_get(struct wlp_uuid, WLP_ATTR_WSSID, wssid)
371wlp_get_sparse(u8, WLP_ATTR_ACC_ENRL, accept_enrl)
372wlp_get_sparse(u8, WLP_ATTR_WSS_SEC_STAT, wss_sec_status)
373wlp_get_sparse(struct uwb_mac_addr, WLP_ATTR_WSS_BCAST, wss_bcast)
374wlp_get_sparse(u8, WLP_ATTR_WSS_TAG, wss_tag)
375wlp_get_sparse(struct uwb_mac_addr, WLP_ATTR_WSS_VIRT, wss_virt)
376wlp_get_sparse(struct wlp_nonce, WLP_ATTR_ENRL_NONCE, enonce)
377wlp_get_sparse(struct wlp_nonce, WLP_ATTR_REG_NONCE, rnonce)
378
379/* The buffers for the device info attributes can be found in the
380 * wlp_device_info struct. These buffers contain one byte more than the
381 * max allowed by the spec - this is done to be able to add the
382 * terminating \0 for user display. This terminating byte is not required
383 * in the actual attribute field (because it has a length field) so the
384 * maximum allowed for this value is one less than its size in the
385 * structure.
386 */
387wlp_vget(char, WLP_ATTR_WSS_NAME, wss_name,
388 FIELD_SIZEOF(struct wlp_wss, name) - 1)
389wlp_vget(char, WLP_ATTR_DEV_NAME, dev_name,
390 FIELD_SIZEOF(struct wlp_device_info, name) - 1)
391wlp_vget(char, WLP_ATTR_MANUF, manufacturer,
392 FIELD_SIZEOF(struct wlp_device_info, manufacturer) - 1)
393wlp_vget(char, WLP_ATTR_MODEL_NAME, model_name,
394 FIELD_SIZEOF(struct wlp_device_info, model_name) - 1)
395wlp_vget(char, WLP_ATTR_MODEL_NR, model_nr,
396 FIELD_SIZEOF(struct wlp_device_info, model_nr) - 1)
397wlp_vget(char, WLP_ATTR_SERIAL, serial,
398 FIELD_SIZEOF(struct wlp_device_info, serial) - 1)
399
400/**
401 * Retrieve WSS Name, Accept enroll, Secure status, Broadcast from WSS info
402 *
403 * @attr: pointer to WSS name attribute in WSS information attribute field
404 * @info: structure that will be populated with data from WSS information
405 * field (WSS name, Accept enroll, secure status, broadcast address)
406 * @buflen: size of buffer
407 *
408 * Although the WSSID attribute forms part of the WSS info attribute it is
409 * retrieved separately and stored in a different location.
410 */
411static ssize_t wlp_get_wss_info_attrs(struct wlp *wlp,
412 struct wlp_attr_hdr *attr,
413 struct wlp_wss_tmp_info *info,
414 ssize_t buflen)
415{
416 struct device *dev = &wlp->rc->uwb_dev.dev;
417 void *ptr = attr;
418 size_t used = 0;
419 ssize_t result = -EINVAL;
420
421 result = wlp_get_wss_name(wlp, ptr, info->name, buflen);
422 if (result < 0) {
423 dev_err(dev, "WLP: unable to obtain WSS name from "
424 "WSS info in D2 message.\n");
425 goto error_parse;
426 }
427 used += result;
428
429 result = wlp_get_accept_enrl(wlp, ptr + used, &info->accept_enroll,
430 buflen - used);
431 if (result < 0) {
432 dev_err(dev, "WLP: unable to obtain accepting "
433 "enrollment from WSS info in D2 message.\n");
434 goto error_parse;
435 }
436 if (info->accept_enroll != 0 && info->accept_enroll != 1) {
437 dev_err(dev, "WLP: invalid value for accepting "
438 "enrollment in D2 message.\n");
439 result = -EINVAL;
440 goto error_parse;
441 }
442 used += result;
443
444 result = wlp_get_wss_sec_status(wlp, ptr + used, &info->sec_status,
445 buflen - used);
446 if (result < 0) {
447 dev_err(dev, "WLP: unable to obtain secure "
448 "status from WSS info in D2 message.\n");
449 goto error_parse;
450 }
451 if (info->sec_status != 0 && info->sec_status != 1) {
452 dev_err(dev, "WLP: invalid value for secure "
453 "status in D2 message.\n");
454 result = -EINVAL;
455 goto error_parse;
456 }
457 used += result;
458
459 result = wlp_get_wss_bcast(wlp, ptr + used, &info->bcast,
460 buflen - used);
461 if (result < 0) {
462 dev_err(dev, "WLP: unable to obtain broadcast "
463 "address from WSS info in D2 message.\n");
464 goto error_parse;
465 }
466 used += result;
467 result = used;
468error_parse:
469 return result;
470}
471
472/**
473 * Create a new WSSID entry for the neighbor, allocate temporary storage
474 *
475 * Each neighbor can have many WSS active. We maintain a list of WSSIDs
476 * advertised by neighbor. During discovery we also cache information about
477 * these WSS in temporary storage.
478 *
479 * The temporary storage will be removed after it has been used (eg.
480 * displayed to user), the wssid element will be removed from the list when
481 * the neighbor is rediscovered or when it disappears.
482 */
483static struct wlp_wssid_e *wlp_create_wssid_e(struct wlp *wlp,
484 struct wlp_neighbor_e *neighbor)
485{
486 struct device *dev = &wlp->rc->uwb_dev.dev;
487 struct wlp_wssid_e *wssid_e;
488
489 wssid_e = kzalloc(sizeof(*wssid_e), GFP_KERNEL);
490 if (wssid_e == NULL) {
491 dev_err(dev, "WLP: unable to allocate memory "
492 "for WSS information.\n");
493 goto error_alloc;
494 }
495 wssid_e->info = kzalloc(sizeof(struct wlp_wss_tmp_info), GFP_KERNEL);
496 if (wssid_e->info == NULL) {
497 dev_err(dev, "WLP: unable to allocate memory "
498 "for temporary WSS information.\n");
499 kfree(wssid_e);
500 wssid_e = NULL;
501 goto error_alloc;
502 }
503 list_add(&wssid_e->node, &neighbor->wssid);
504error_alloc:
505 return wssid_e;
506}
507
508/**
509 * Parse WSS information attribute
510 *
511 * @attr: pointer to WSS information attribute header
512 * @buflen: size of buffer in which WSS information attribute appears
513 * @wssid: will place wssid from WSS info attribute in this location
514 * @wss_info: will place other information from WSS information attribute
515 * in this location
516 *
517 * memory for @wssid and @wss_info must be allocated when calling this
518 */
519static ssize_t wlp_get_wss_info(struct wlp *wlp, struct wlp_attr_wss_info *attr,
520 size_t buflen, struct wlp_uuid *wssid,
521 struct wlp_wss_tmp_info *wss_info)
522{
523 struct device *dev = &wlp->rc->uwb_dev.dev;
524 ssize_t result;
525 size_t len;
526 size_t used = 0;
527 void *ptr;
528
529 result = wlp_check_wss_info_attr_hdr(wlp, (struct wlp_attr_hdr *)attr,
530 buflen);
531 if (result < 0)
532 goto out;
533 len = result;
534 used = sizeof(*attr);
535 ptr = attr;
536
537 result = wlp_get_wssid(wlp, ptr + used, wssid, buflen - used);
538 if (result < 0) {
539 dev_err(dev, "WLP: unable to obtain WSSID from WSS info.\n");
540 goto out;
541 }
542 used += result;
543 result = wlp_get_wss_info_attrs(wlp, ptr + used, wss_info,
544 buflen - used);
545 if (result < 0) {
546 dev_err(dev, "WLP: unable to obtain WSS information "
547 "from WSS information attributes. \n");
548 goto out;
549 }
550 used += result;
551 if (len + sizeof(*attr) != used) {
552 dev_err(dev, "WLP: Amount of data parsed does not "
553 "match length field. Parsed %zu, length "
554 "field %zu. \n", used, len);
555 result = -EINVAL;
556 goto out;
557 }
558 result = used;
559out:
560 return result;
561}
562
563/**
564 * Retrieve WSS info from association frame
565 *
566 * @attr: pointer to WSS information attribute
567 * @neighbor: ptr to neighbor being discovered, NULL if enrollment in
568 * progress
569 * @wss: ptr to WSS being enrolled in, NULL if discovery in progress
570 * @buflen: size of buffer in which WSS information appears
571 *
572 * The WSS information attribute appears in the D2 association message.
573 * This message is used in two ways: to discover all neighbors or to enroll
574 * into a WSS activated by a neighbor. During discovery we only want to
575 * store the WSS info in a cache, to be deleted right after it has been
576 * used (eg. displayed to the user). During enrollment we store the WSS
577 * information for the lifetime of enrollment.
578 *
579 * During discovery we are interested in all WSS information, during
580 * enrollment we are only interested in the WSS being enrolled in. Even so,
581 * when in enrollment we keep parsing the message after finding the WSS of
582 * interest, this simplifies the calling routine in that it can be sure
583 * that all WSS information attributes have been parsed out of the message.
584 *
585 * Association frame is process with nbmutex held. The list access is safe.
586 */
587static ssize_t wlp_get_all_wss_info(struct wlp *wlp,
588 struct wlp_attr_wss_info *attr,
589 struct wlp_neighbor_e *neighbor,
590 struct wlp_wss *wss, ssize_t buflen)
591{
592 struct device *dev = &wlp->rc->uwb_dev.dev;
593 size_t used = 0;
594 ssize_t result = -EINVAL;
595 struct wlp_attr_wss_info *cur;
596 struct wlp_uuid wssid;
597 struct wlp_wss_tmp_info wss_info;
598 unsigned enroll; /* 0 - discovery to cache, 1 - enrollment */
599 struct wlp_wssid_e *wssid_e;
600 char buf[WLP_WSS_UUID_STRSIZE];
601
602 if (buflen < 0)
603 goto out;
604
605 if (neighbor != NULL && wss == NULL)
606 enroll = 0; /* discovery */
607 else if (wss != NULL && neighbor == NULL)
608 enroll = 1; /* enrollment */
609 else
610 goto out;
611
612 cur = attr;
613 while (buflen - used > 0) {
614 memset(&wss_info, 0, sizeof(wss_info));
615 cur = (void *)cur + used;
616 result = wlp_get_wss_info(wlp, cur, buflen - used, &wssid,
617 &wss_info);
618 if (result == -ENODATA) {
619 result = used;
620 goto out;
621 } else if (result < 0) {
622 dev_err(dev, "WLP: Unable to parse WSS information "
623 "from WSS information attribute. \n");
624 result = -EINVAL;
625 goto error_parse;
626 }
627 if (enroll && !memcmp(&wssid, &wss->wssid, sizeof(wssid))) {
628 if (wss_info.accept_enroll != 1) {
629 dev_err(dev, "WLP: Requested WSS does "
630 "not accept enrollment.\n");
631 result = -EINVAL;
632 goto out;
633 }
634 memcpy(wss->name, wss_info.name, sizeof(wss->name));
635 wss->bcast = wss_info.bcast;
636 wss->secure_status = wss_info.sec_status;
637 wss->accept_enroll = wss_info.accept_enroll;
638 wss->state = WLP_WSS_STATE_PART_ENROLLED;
639 wlp_wss_uuid_print(buf, sizeof(buf), &wssid);
640 dev_dbg(dev, "WLP: Found WSS %s. Enrolling.\n", buf);
641 } else {
642 wssid_e = wlp_create_wssid_e(wlp, neighbor);
643 if (wssid_e == NULL) {
644 dev_err(dev, "WLP: Cannot create new WSSID "
645 "entry for neighbor %02x:%02x.\n",
646 neighbor->uwb_dev->dev_addr.data[1],
647 neighbor->uwb_dev->dev_addr.data[0]);
648 result = -ENOMEM;
649 goto out;
650 }
651 wssid_e->wssid = wssid;
652 *wssid_e->info = wss_info;
653 }
654 used += result;
655 }
656 result = used;
657error_parse:
658 if (result < 0 && !enroll) /* this was a discovery */
659 wlp_remove_neighbor_tmp_info(neighbor);
660out:
661 return result;
662
663}
664
665/**
666 * Parse WSS information attributes into cache for discovery
667 *
668 * @attr: the first WSS information attribute in message
669 * @neighbor: the neighbor whose cache will be populated
670 * @buflen: size of the input buffer
671 */
672static ssize_t wlp_get_wss_info_to_cache(struct wlp *wlp,
673 struct wlp_attr_wss_info *attr,
674 struct wlp_neighbor_e *neighbor,
675 ssize_t buflen)
676{
677 return wlp_get_all_wss_info(wlp, attr, neighbor, NULL, buflen);
678}
679
680/**
681 * Parse WSS information attributes into WSS struct for enrollment
682 *
683 * @attr: the first WSS information attribute in message
684 * @wss: the WSS that will be enrolled
685 * @buflen: size of the input buffer
686 */
687static ssize_t wlp_get_wss_info_to_enroll(struct wlp *wlp,
688 struct wlp_attr_wss_info *attr,
689 struct wlp_wss *wss, ssize_t buflen)
690{
691 return wlp_get_all_wss_info(wlp, attr, NULL, wss, buflen);
692}
693
694/**
695 * Construct a D1 association frame
696 *
697 * We use the radio control functions to determine the values of the device
698 * properties. These are of variable length and the total space needed is
699 * tallied first before we start constructing the message. The radio
700 * control functions return strings that are terminated with \0. This
701 * character should not be included in the message (there is a length field
702 * accompanying it in the attribute).
703 */
704static int wlp_build_assoc_d1(struct wlp *wlp, struct wlp_wss *wss,
705 struct sk_buff **skb)
706{
707
708 struct device *dev = &wlp->rc->uwb_dev.dev;
709 int result = 0;
710 struct wlp_device_info *info;
711 size_t used = 0;
712 struct wlp_frame_assoc *_d1;
713 struct sk_buff *_skb;
714 void *d1_itr;
715
716 if (wlp->dev_info == NULL) {
717 result = __wlp_setup_device_info(wlp);
718 if (result < 0) {
719 dev_err(dev, "WLP: Unable to setup device "
720 "information for D1 message.\n");
721 goto error;
722 }
723 }
724 info = wlp->dev_info;
725 _skb = dev_alloc_skb(sizeof(*_d1)
726 + sizeof(struct wlp_attr_uuid_e)
727 + sizeof(struct wlp_attr_wss_sel_mthd)
728 + sizeof(struct wlp_attr_dev_name)
729 + strlen(info->name)
730 + sizeof(struct wlp_attr_manufacturer)
731 + strlen(info->manufacturer)
732 + sizeof(struct wlp_attr_model_name)
733 + strlen(info->model_name)
734 + sizeof(struct wlp_attr_model_nr)
735 + strlen(info->model_nr)
736 + sizeof(struct wlp_attr_serial)
737 + strlen(info->serial)
738 + sizeof(struct wlp_attr_prim_dev_type)
739 + sizeof(struct wlp_attr_wlp_assc_err));
740 if (_skb == NULL) {
741 dev_err(dev, "WLP: Cannot allocate memory for association "
742 "message.\n");
743 result = -ENOMEM;
744 goto error;
745 }
746 _d1 = (void *) _skb->data;
747 _d1->hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
748 _d1->hdr.type = WLP_FRAME_ASSOCIATION;
749 _d1->type = WLP_ASSOC_D1;
750
751 wlp_set_version(&_d1->version, WLP_VERSION);
752 wlp_set_msg_type(&_d1->msg_type, WLP_ASSOC_D1);
753 d1_itr = _d1->attr;
754 used = wlp_set_uuid_e(d1_itr, &wlp->uuid);
755 used += wlp_set_wss_sel_mthd(d1_itr + used, WLP_WSS_REG_SELECT);
756 used += wlp_set_dev_name(d1_itr + used, info->name,
757 strlen(info->name));
758 used += wlp_set_manufacturer(d1_itr + used, info->manufacturer,
759 strlen(info->manufacturer));
760 used += wlp_set_model_name(d1_itr + used, info->model_name,
761 strlen(info->model_name));
762 used += wlp_set_model_nr(d1_itr + used, info->model_nr,
763 strlen(info->model_nr));
764 used += wlp_set_serial(d1_itr + used, info->serial,
765 strlen(info->serial));
766 used += wlp_set_prim_dev_type(d1_itr + used, &info->prim_dev_type);
767 used += wlp_set_wlp_assc_err(d1_itr + used, WLP_ASSOC_ERROR_NONE);
768 skb_put(_skb, sizeof(*_d1) + used);
769 *skb = _skb;
770error:
771 return result;
772}
773
774/**
775 * Construct a D2 association frame
776 *
777 * We use the radio control functions to determine the values of the device
778 * properties. These are of variable length and the total space needed is
779 * tallied first before we start constructing the message. The radio
780 * control functions return strings that are terminated with \0. This
781 * character should not be included in the message (there is a length field
782 * accompanying it in the attribute).
783 */
784static
785int wlp_build_assoc_d2(struct wlp *wlp, struct wlp_wss *wss,
786 struct sk_buff **skb, struct wlp_uuid *uuid_e)
787{
788
789 struct device *dev = &wlp->rc->uwb_dev.dev;
790 int result = 0;
791 struct wlp_device_info *info;
792 size_t used = 0;
793 struct wlp_frame_assoc *_d2;
794 struct sk_buff *_skb;
795 void *d2_itr;
796 size_t mem_needed;
797
798 if (wlp->dev_info == NULL) {
799 result = __wlp_setup_device_info(wlp);
800 if (result < 0) {
801 dev_err(dev, "WLP: Unable to setup device "
802 "information for D2 message.\n");
803 goto error;
804 }
805 }
806 info = wlp->dev_info;
807 mem_needed = sizeof(*_d2)
808 + sizeof(struct wlp_attr_uuid_e)
809 + sizeof(struct wlp_attr_uuid_r)
810 + sizeof(struct wlp_attr_dev_name)
811 + strlen(info->name)
812 + sizeof(struct wlp_attr_manufacturer)
813 + strlen(info->manufacturer)
814 + sizeof(struct wlp_attr_model_name)
815 + strlen(info->model_name)
816 + sizeof(struct wlp_attr_model_nr)
817 + strlen(info->model_nr)
818 + sizeof(struct wlp_attr_serial)
819 + strlen(info->serial)
820 + sizeof(struct wlp_attr_prim_dev_type)
821 + sizeof(struct wlp_attr_wlp_assc_err);
822 if (wlp->wss.state >= WLP_WSS_STATE_ACTIVE)
823 mem_needed += sizeof(struct wlp_attr_wss_info)
824 + sizeof(struct wlp_wss_info)
825 + strlen(wlp->wss.name);
826 _skb = dev_alloc_skb(mem_needed);
827 if (_skb == NULL) {
828 dev_err(dev, "WLP: Cannot allocate memory for association "
829 "message.\n");
830 result = -ENOMEM;
831 goto error;
832 }
833 _d2 = (void *) _skb->data;
834 _d2->hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
835 _d2->hdr.type = WLP_FRAME_ASSOCIATION;
836 _d2->type = WLP_ASSOC_D2;
837
838 wlp_set_version(&_d2->version, WLP_VERSION);
839 wlp_set_msg_type(&_d2->msg_type, WLP_ASSOC_D2);
840 d2_itr = _d2->attr;
841 used = wlp_set_uuid_e(d2_itr, uuid_e);
842 used += wlp_set_uuid_r(d2_itr + used, &wlp->uuid);
843 if (wlp->wss.state >= WLP_WSS_STATE_ACTIVE)
844 used += wlp_set_wss_info(d2_itr + used, &wlp->wss);
845 used += wlp_set_dev_name(d2_itr + used, info->name,
846 strlen(info->name));
847 used += wlp_set_manufacturer(d2_itr + used, info->manufacturer,
848 strlen(info->manufacturer));
849 used += wlp_set_model_name(d2_itr + used, info->model_name,
850 strlen(info->model_name));
851 used += wlp_set_model_nr(d2_itr + used, info->model_nr,
852 strlen(info->model_nr));
853 used += wlp_set_serial(d2_itr + used, info->serial,
854 strlen(info->serial));
855 used += wlp_set_prim_dev_type(d2_itr + used, &info->prim_dev_type);
856 used += wlp_set_wlp_assc_err(d2_itr + used, WLP_ASSOC_ERROR_NONE);
857 skb_put(_skb, sizeof(*_d2) + used);
858 *skb = _skb;
859error:
860 return result;
861}
862
863/**
864 * Allocate memory for and populate fields of F0 association frame
865 *
866 * Currently (while focusing on unsecure enrollment) we ignore the
867 * nonce's that could be placed in the message. Only the error field is
868 * populated by the value provided by the caller.
869 */
870static
871int wlp_build_assoc_f0(struct wlp *wlp, struct sk_buff **skb,
872 enum wlp_assc_error error)
873{
874 struct device *dev = &wlp->rc->uwb_dev.dev;
875 int result = -ENOMEM;
876 struct {
877 struct wlp_frame_assoc f0_hdr;
878 struct wlp_attr_enonce enonce;
879 struct wlp_attr_rnonce rnonce;
880 struct wlp_attr_wlp_assc_err assc_err;
881 } *f0;
882 struct sk_buff *_skb;
883 struct wlp_nonce tmp;
884
885 _skb = dev_alloc_skb(sizeof(*f0));
886 if (_skb == NULL) {
887 dev_err(dev, "WLP: Unable to allocate memory for F0 "
888 "association frame. \n");
889 goto error_alloc;
890 }
891 f0 = (void *) _skb->data;
892 f0->f0_hdr.hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
893 f0->f0_hdr.hdr.type = WLP_FRAME_ASSOCIATION;
894 f0->f0_hdr.type = WLP_ASSOC_F0;
895 wlp_set_version(&f0->f0_hdr.version, WLP_VERSION);
896 wlp_set_msg_type(&f0->f0_hdr.msg_type, WLP_ASSOC_F0);
897 memset(&tmp, 0, sizeof(tmp));
898 wlp_set_enonce(&f0->enonce, &tmp);
899 wlp_set_rnonce(&f0->rnonce, &tmp);
900 wlp_set_wlp_assc_err(&f0->assc_err, error);
901 skb_put(_skb, sizeof(*f0));
902 *skb = _skb;
903 result = 0;
904error_alloc:
905 return result;
906}
907
908/**
909 * Parse F0 frame
910 *
911 * We just retrieve the values and print it as an error to the user.
912 * Calling function already knows an error occured (F0 indicates error), so
913 * we just parse the content as debug for higher layers.
914 */
915int wlp_parse_f0(struct wlp *wlp, struct sk_buff *skb)
916{
917 struct device *dev = &wlp->rc->uwb_dev.dev;
918 struct wlp_frame_assoc *f0 = (void *) skb->data;
919 void *ptr = skb->data;
920 size_t len = skb->len;
921 size_t used;
922 ssize_t result;
923 struct wlp_nonce enonce, rnonce;
924 enum wlp_assc_error assc_err;
925 char enonce_buf[WLP_WSS_NONCE_STRSIZE];
926 char rnonce_buf[WLP_WSS_NONCE_STRSIZE];
927
928 used = sizeof(*f0);
929 result = wlp_get_enonce(wlp, ptr + used, &enonce, len - used);
930 if (result < 0) {
931 dev_err(dev, "WLP: unable to obtain Enrollee nonce "
932 "attribute from F0 message.\n");
933 goto error_parse;
934 }
935 used += result;
936 result = wlp_get_rnonce(wlp, ptr + used, &rnonce, len - used);
937 if (result < 0) {
938 dev_err(dev, "WLP: unable to obtain Registrar nonce "
939 "attribute from F0 message.\n");
940 goto error_parse;
941 }
942 used += result;
943 result = wlp_get_wlp_assc_err(wlp, ptr + used, &assc_err, len - used);
944 if (result < 0) {
945 dev_err(dev, "WLP: unable to obtain WLP Association error "
946 "attribute from F0 message.\n");
947 goto error_parse;
948 }
949 wlp_wss_nonce_print(enonce_buf, sizeof(enonce_buf), &enonce);
950 wlp_wss_nonce_print(rnonce_buf, sizeof(rnonce_buf), &rnonce);
951 dev_err(dev, "WLP: Received F0 error frame from neighbor. Enrollee "
952 "nonce: %s, Registrar nonce: %s, WLP Association error: %s.\n",
953 enonce_buf, rnonce_buf, wlp_assc_error_str(assc_err));
954 result = 0;
955error_parse:
956 return result;
957}
958
959/**
960 * Retrieve variable device information from association message
961 *
962 * The device information parsed is not required in any message. This
963 * routine will thus not fail if an attribute is not present.
964 * The attributes are expected in a certain order, even if all are not
965 * present. The "attribute type" value is used to ensure the attributes
966 * are parsed in the correct order.
967 *
968 * If an error is encountered during parsing the function will return an
969 * error code, when this happens the given device_info structure may be
970 * partially filled.
971 */
972static
973int wlp_get_variable_info(struct wlp *wlp, void *data,
974 struct wlp_device_info *dev_info, ssize_t len)
975{
976 struct device *dev = &wlp->rc->uwb_dev.dev;
977 size_t used = 0;
978 struct wlp_attr_hdr *hdr;
979 ssize_t result = 0;
980 unsigned last = 0;
981
982 while (len - used > 0) {
983 if (len - used < sizeof(*hdr)) {
984 dev_err(dev, "WLP: Partial data in frame, cannot "
985 "parse. \n");
986 goto error_parse;
987 }
988 hdr = data + used;
989 switch (le16_to_cpu(hdr->type)) {
990 case WLP_ATTR_MANUF:
991 if (last >= WLP_ATTR_MANUF) {
992 dev_err(dev, "WLP: Incorrect order of "
993 "attribute values in D1 msg.\n");
994 goto error_parse;
995 }
996 result = wlp_get_manufacturer(wlp, data + used,
997 dev_info->manufacturer,
998 len - used);
999 if (result < 0) {
1000 dev_err(dev, "WLP: Unable to obtain "
1001 "Manufacturer attribute from D1 "
1002 "message.\n");
1003 goto error_parse;
1004 }
1005 last = WLP_ATTR_MANUF;
1006 used += result;
1007 break;
1008 case WLP_ATTR_MODEL_NAME:
1009 if (last >= WLP_ATTR_MODEL_NAME) {
1010 dev_err(dev, "WLP: Incorrect order of "
1011 "attribute values in D1 msg.\n");
1012 goto error_parse;
1013 }
1014 result = wlp_get_model_name(wlp, data + used,
1015 dev_info->model_name,
1016 len - used);
1017 if (result < 0) {
1018 dev_err(dev, "WLP: Unable to obtain Model "
1019 "name attribute from D1 message.\n");
1020 goto error_parse;
1021 }
1022 last = WLP_ATTR_MODEL_NAME;
1023 used += result;
1024 break;
1025 case WLP_ATTR_MODEL_NR:
1026 if (last >= WLP_ATTR_MODEL_NR) {
1027 dev_err(dev, "WLP: Incorrect order of "
1028 "attribute values in D1 msg.\n");
1029 goto error_parse;
1030 }
1031 result = wlp_get_model_nr(wlp, data + used,
1032 dev_info->model_nr,
1033 len - used);
1034 if (result < 0) {
1035 dev_err(dev, "WLP: Unable to obtain Model "
1036 "number attribute from D1 message.\n");
1037 goto error_parse;
1038 }
1039 last = WLP_ATTR_MODEL_NR;
1040 used += result;
1041 break;
1042 case WLP_ATTR_SERIAL:
1043 if (last >= WLP_ATTR_SERIAL) {
1044 dev_err(dev, "WLP: Incorrect order of "
1045 "attribute values in D1 msg.\n");
1046 goto error_parse;
1047 }
1048 result = wlp_get_serial(wlp, data + used,
1049 dev_info->serial, len - used);
1050 if (result < 0) {
1051 dev_err(dev, "WLP: Unable to obtain Serial "
1052 "number attribute from D1 message.\n");
1053 goto error_parse;
1054 }
1055 last = WLP_ATTR_SERIAL;
1056 used += result;
1057 break;
1058 case WLP_ATTR_PRI_DEV_TYPE:
1059 if (last >= WLP_ATTR_PRI_DEV_TYPE) {
1060 dev_err(dev, "WLP: Incorrect order of "
1061 "attribute values in D1 msg.\n");
1062 goto error_parse;
1063 }
1064 result = wlp_get_prim_dev_type(wlp, data + used,
1065 &dev_info->prim_dev_type,
1066 len - used);
1067 if (result < 0) {
1068 dev_err(dev, "WLP: Unable to obtain Primary "
1069 "device type attribute from D1 "
1070 "message.\n");
1071 goto error_parse;
1072 }
1073 dev_info->prim_dev_type.category =
1074 le16_to_cpu(dev_info->prim_dev_type.category);
1075 dev_info->prim_dev_type.subID =
1076 le16_to_cpu(dev_info->prim_dev_type.subID);
1077 last = WLP_ATTR_PRI_DEV_TYPE;
1078 used += result;
1079 break;
1080 default:
1081 /* This is not variable device information. */
1082 goto out;
1083 break;
1084 }
1085 }
1086out:
1087 return used;
1088error_parse:
1089 return -EINVAL;
1090}
1091
1092/**
1093 * Parse incoming D1 frame, populate attribute values
1094 *
1095 * Caller provides pointers to memory already allocated for attributes
1096 * expected in the D1 frame. These variables will be populated.
1097 */
1098static
1099int wlp_parse_d1_frame(struct wlp *wlp, struct sk_buff *skb,
1100 struct wlp_uuid *uuid_e,
1101 enum wlp_wss_sel_mthd *sel_mthd,
1102 struct wlp_device_info *dev_info,
1103 enum wlp_assc_error *assc_err)
1104{
1105 struct device *dev = &wlp->rc->uwb_dev.dev;
1106 struct wlp_frame_assoc *d1 = (void *) skb->data;
1107 void *ptr = skb->data;
1108 size_t len = skb->len;
1109 size_t used;
1110 ssize_t result;
1111
1112 used = sizeof(*d1);
1113 result = wlp_get_uuid_e(wlp, ptr + used, uuid_e, len - used);
1114 if (result < 0) {
1115 dev_err(dev, "WLP: unable to obtain UUID-E attribute from D1 "
1116 "message.\n");
1117 goto error_parse;
1118 }
1119 used += result;
1120 result = wlp_get_wss_sel_mthd(wlp, ptr + used, sel_mthd, len - used);
1121 if (result < 0) {
1122 dev_err(dev, "WLP: unable to obtain WSS selection method "
1123 "from D1 message.\n");
1124 goto error_parse;
1125 }
1126 used += result;
1127 result = wlp_get_dev_name(wlp, ptr + used, dev_info->name,
1128 len - used);
1129 if (result < 0) {
1130 dev_err(dev, "WLP: unable to obtain Device Name from D1 "
1131 "message.\n");
1132 goto error_parse;
1133 }
1134 used += result;
1135 result = wlp_get_variable_info(wlp, ptr + used, dev_info, len - used);
1136 if (result < 0) {
1137 dev_err(dev, "WLP: unable to obtain Device Information from "
1138 "D1 message.\n");
1139 goto error_parse;
1140 }
1141 used += result;
1142 result = wlp_get_wlp_assc_err(wlp, ptr + used, assc_err, len - used);
1143 if (result < 0) {
1144 dev_err(dev, "WLP: unable to obtain WLP Association Error "
1145 "Information from D1 message.\n");
1146 goto error_parse;
1147 }
1148 result = 0;
1149error_parse:
1150 return result;
1151}
1152/**
1153 * Handle incoming D1 frame
1154 *
1155 * The frame has already been verified to contain an Association header with
1156 * the correct version number. Parse the incoming frame, construct and send
1157 * a D2 frame in response.
1158 *
1159 * It is not clear what to do with most fields in the incoming D1 frame. We
1160 * retrieve and discard the information here for now.
1161 */
1162void wlp_handle_d1_frame(struct work_struct *ws)
1163{
1164 struct wlp_assoc_frame_ctx *frame_ctx = container_of(ws,
1165 struct wlp_assoc_frame_ctx,
1166 ws);
1167 struct wlp *wlp = frame_ctx->wlp;
1168 struct wlp_wss *wss = &wlp->wss;
1169 struct sk_buff *skb = frame_ctx->skb;
1170 struct uwb_dev_addr *src = &frame_ctx->src;
1171 int result;
1172 struct device *dev = &wlp->rc->uwb_dev.dev;
1173 struct wlp_uuid uuid_e;
1174 enum wlp_wss_sel_mthd sel_mthd = 0;
1175 struct wlp_device_info dev_info;
1176 enum wlp_assc_error assc_err;
1177 struct sk_buff *resp = NULL;
1178
1179 /* Parse D1 frame */
1180 mutex_lock(&wss->mutex);
1181 mutex_lock(&wlp->mutex); /* to access wlp->uuid */
1182 memset(&dev_info, 0, sizeof(dev_info));
1183 result = wlp_parse_d1_frame(wlp, skb, &uuid_e, &sel_mthd, &dev_info,
1184 &assc_err);
1185 if (result < 0) {
1186 dev_err(dev, "WLP: Unable to parse incoming D1 frame.\n");
1187 kfree_skb(skb);
1188 goto out;
1189 }
1190
1191 kfree_skb(skb);
1192 if (!wlp_uuid_is_set(&wlp->uuid)) {
1193 dev_err(dev, "WLP: UUID is not set. Set via sysfs to "
1194 "proceed. Respong to D1 message with error F0.\n");
1195 result = wlp_build_assoc_f0(wlp, &resp,
1196 WLP_ASSOC_ERROR_NOT_READY);
1197 if (result < 0) {
1198 dev_err(dev, "WLP: Unable to construct F0 message.\n");
1199 goto out;
1200 }
1201 } else {
1202 /* Construct D2 frame */
1203 result = wlp_build_assoc_d2(wlp, wss, &resp, &uuid_e);
1204 if (result < 0) {
1205 dev_err(dev, "WLP: Unable to construct D2 message.\n");
1206 goto out;
1207 }
1208 }
1209 /* Send D2 frame */
1210 BUG_ON(wlp->xmit_frame == NULL);
1211 result = wlp->xmit_frame(wlp, resp, src);
1212 if (result < 0) {
1213 dev_err(dev, "WLP: Unable to transmit D2 association "
1214 "message: %d\n", result);
1215 if (result == -ENXIO)
1216 dev_err(dev, "WLP: Is network interface up? \n");
1217 /* We could try again ... */
1218 dev_kfree_skb_any(resp); /* we need to free if tx fails */
1219 }
1220out:
1221 kfree(frame_ctx);
1222 mutex_unlock(&wlp->mutex);
1223 mutex_unlock(&wss->mutex);
1224}
1225
1226/**
1227 * Parse incoming D2 frame, create and populate temporary cache
1228 *
1229 * @skb: socket buffer in which D2 frame can be found
1230 * @neighbor: the neighbor that sent the D2 frame
1231 *
1232 * Will allocate memory for temporary storage of information learned during
1233 * discovery.
1234 */
1235int wlp_parse_d2_frame_to_cache(struct wlp *wlp, struct sk_buff *skb,
1236 struct wlp_neighbor_e *neighbor)
1237{
1238 struct device *dev = &wlp->rc->uwb_dev.dev;
1239 struct wlp_frame_assoc *d2 = (void *) skb->data;
1240 void *ptr = skb->data;
1241 size_t len = skb->len;
1242 size_t used;
1243 ssize_t result;
1244 struct wlp_uuid uuid_e;
1245 struct wlp_device_info *nb_info;
1246 enum wlp_assc_error assc_err;
1247
1248 used = sizeof(*d2);
1249 result = wlp_get_uuid_e(wlp, ptr + used, &uuid_e, len - used);
1250 if (result < 0) {
1251 dev_err(dev, "WLP: unable to obtain UUID-E attribute from D2 "
1252 "message.\n");
1253 goto error_parse;
1254 }
1255 if (memcmp(&uuid_e, &wlp->uuid, sizeof(uuid_e))) {
1256 dev_err(dev, "WLP: UUID-E in incoming D2 does not match "
1257 "local UUID sent in D1. \n");
1258 goto error_parse;
1259 }
1260 used += result;
1261 result = wlp_get_uuid_r(wlp, ptr + used, &neighbor->uuid, len - used);
1262 if (result < 0) {
1263 dev_err(dev, "WLP: unable to obtain UUID-R attribute from D2 "
1264 "message.\n");
1265 goto error_parse;
1266 }
1267 used += result;
1268 result = wlp_get_wss_info_to_cache(wlp, ptr + used, neighbor,
1269 len - used);
1270 if (result < 0) {
1271 dev_err(dev, "WLP: unable to obtain WSS information "
1272 "from D2 message.\n");
1273 goto error_parse;
1274 }
1275 used += result;
1276 neighbor->info = kzalloc(sizeof(struct wlp_device_info), GFP_KERNEL);
1277 if (neighbor->info == NULL) {
1278 dev_err(dev, "WLP: cannot allocate memory to store device "
1279 "info.\n");
1280 result = -ENOMEM;
1281 goto error_parse;
1282 }
1283 nb_info = neighbor->info;
1284 result = wlp_get_dev_name(wlp, ptr + used, nb_info->name,
1285 len - used);
1286 if (result < 0) {
1287 dev_err(dev, "WLP: unable to obtain Device Name from D2 "
1288 "message.\n");
1289 goto error_parse;
1290 }
1291 used += result;
1292 result = wlp_get_variable_info(wlp, ptr + used, nb_info, len - used);
1293 if (result < 0) {
1294 dev_err(dev, "WLP: unable to obtain Device Information from "
1295 "D2 message.\n");
1296 goto error_parse;
1297 }
1298 used += result;
1299 result = wlp_get_wlp_assc_err(wlp, ptr + used, &assc_err, len - used);
1300 if (result < 0) {
1301 dev_err(dev, "WLP: unable to obtain WLP Association Error "
1302 "Information from D2 message.\n");
1303 goto error_parse;
1304 }
1305 if (assc_err != WLP_ASSOC_ERROR_NONE) {
1306 dev_err(dev, "WLP: neighbor device returned association "
1307 "error %d\n", assc_err);
1308 result = -EINVAL;
1309 goto error_parse;
1310 }
1311 result = 0;
1312error_parse:
1313 if (result < 0)
1314 wlp_remove_neighbor_tmp_info(neighbor);
1315 return result;
1316}
1317
1318/**
1319 * Parse incoming D2 frame, populate attribute values of WSS bein enrolled in
1320 *
1321 * @wss: our WSS that will be enrolled
1322 * @skb: socket buffer in which D2 frame can be found
1323 * @neighbor: the neighbor that sent the D2 frame
1324 * @wssid: the wssid of the WSS in which we want to enroll
1325 *
1326 * Forms part of enrollment sequence. We are trying to enroll in WSS with
1327 * @wssid by using @neighbor as registrar. A D1 message was sent to
1328 * @neighbor and now we need to parse the D2 response. The neighbor's
1329 * response is searched for the requested WSS and if found (and it accepts
1330 * enrollment), we store the information.
1331 */
1332int wlp_parse_d2_frame_to_enroll(struct wlp_wss *wss, struct sk_buff *skb,
1333 struct wlp_neighbor_e *neighbor,
1334 struct wlp_uuid *wssid)
1335{
1336 struct wlp *wlp = container_of(wss, struct wlp, wss);
1337 struct device *dev = &wlp->rc->uwb_dev.dev;
1338 void *ptr = skb->data;
1339 size_t len = skb->len;
1340 size_t used;
1341 ssize_t result;
1342 struct wlp_uuid uuid_e;
1343 struct wlp_uuid uuid_r;
1344 struct wlp_device_info nb_info;
1345 enum wlp_assc_error assc_err;
1346 char uuid_bufA[WLP_WSS_UUID_STRSIZE];
1347 char uuid_bufB[WLP_WSS_UUID_STRSIZE];
1348
1349 used = sizeof(struct wlp_frame_assoc);
1350 result = wlp_get_uuid_e(wlp, ptr + used, &uuid_e, len - used);
1351 if (result < 0) {
1352 dev_err(dev, "WLP: unable to obtain UUID-E attribute from D2 "
1353 "message.\n");
1354 goto error_parse;
1355 }
1356 if (memcmp(&uuid_e, &wlp->uuid, sizeof(uuid_e))) {
1357 dev_err(dev, "WLP: UUID-E in incoming D2 does not match "
1358 "local UUID sent in D1. \n");
1359 goto error_parse;
1360 }
1361 used += result;
1362 result = wlp_get_uuid_r(wlp, ptr + used, &uuid_r, len - used);
1363 if (result < 0) {
1364 dev_err(dev, "WLP: unable to obtain UUID-R attribute from D2 "
1365 "message.\n");
1366 goto error_parse;
1367 }
1368 if (memcmp(&uuid_r, &neighbor->uuid, sizeof(uuid_r))) {
1369 wlp_wss_uuid_print(uuid_bufA, sizeof(uuid_bufA),
1370 &neighbor->uuid);
1371 wlp_wss_uuid_print(uuid_bufB, sizeof(uuid_bufB), &uuid_r);
1372 dev_err(dev, "WLP: UUID of neighbor does not match UUID "
1373 "learned during discovery. Originally discovered: %s, "
1374 "now from D2 message: %s\n", uuid_bufA, uuid_bufB);
1375 result = -EINVAL;
1376 goto error_parse;
1377 }
1378 used += result;
1379 wss->wssid = *wssid;
1380 result = wlp_get_wss_info_to_enroll(wlp, ptr + used, wss, len - used);
1381 if (result < 0) {
1382 dev_err(dev, "WLP: unable to obtain WSS information "
1383 "from D2 message.\n");
1384 goto error_parse;
1385 }
1386 if (wss->state != WLP_WSS_STATE_PART_ENROLLED) {
1387 dev_err(dev, "WLP: D2 message did not contain information "
1388 "for successful enrollment. \n");
1389 result = -EINVAL;
1390 goto error_parse;
1391 }
1392 used += result;
1393 /* Place device information on stack to continue parsing of message */
1394 result = wlp_get_dev_name(wlp, ptr + used, nb_info.name,
1395 len - used);
1396 if (result < 0) {
1397 dev_err(dev, "WLP: unable to obtain Device Name from D2 "
1398 "message.\n");
1399 goto error_parse;
1400 }
1401 used += result;
1402 result = wlp_get_variable_info(wlp, ptr + used, &nb_info, len - used);
1403 if (result < 0) {
1404 dev_err(dev, "WLP: unable to obtain Device Information from "
1405 "D2 message.\n");
1406 goto error_parse;
1407 }
1408 used += result;
1409 result = wlp_get_wlp_assc_err(wlp, ptr + used, &assc_err, len - used);
1410 if (result < 0) {
1411 dev_err(dev, "WLP: unable to obtain WLP Association Error "
1412 "Information from D2 message.\n");
1413 goto error_parse;
1414 }
1415 if (assc_err != WLP_ASSOC_ERROR_NONE) {
1416 dev_err(dev, "WLP: neighbor device returned association "
1417 "error %d\n", assc_err);
1418 if (wss->state == WLP_WSS_STATE_PART_ENROLLED) {
1419 dev_err(dev, "WLP: Enrolled in WSS (should not "
1420 "happen according to spec). Undoing. \n");
1421 wlp_wss_reset(wss);
1422 }
1423 result = -EINVAL;
1424 goto error_parse;
1425 }
1426 result = 0;
1427error_parse:
1428 return result;
1429}
1430
1431/**
1432 * Parse C3/C4 frame into provided variables
1433 *
1434 * @wssid: will point to copy of wssid retrieved from C3/C4 frame
1435 * @tag: will point to copy of tag retrieved from C3/C4 frame
1436 * @virt_addr: will point to copy of virtual address retrieved from C3/C4
1437 * frame.
1438 *
1439 * Calling function has to allocate memory for these values.
1440 *
1441 * skb contains a valid C3/C4 frame, return the individual fields of this
1442 * frame in the provided variables.
1443 */
1444int wlp_parse_c3c4_frame(struct wlp *wlp, struct sk_buff *skb,
1445 struct wlp_uuid *wssid, u8 *tag,
1446 struct uwb_mac_addr *virt_addr)
1447{
1448 struct device *dev = &wlp->rc->uwb_dev.dev;
1449 int result;
1450 void *ptr = skb->data;
1451 size_t len = skb->len;
1452 size_t used;
1453 struct wlp_frame_assoc *assoc = ptr;
1454
1455 used = sizeof(*assoc);
1456 result = wlp_get_wssid(wlp, ptr + used, wssid, len - used);
1457 if (result < 0) {
1458 dev_err(dev, "WLP: unable to obtain WSSID attribute from "
1459 "%s message.\n", wlp_assoc_frame_str(assoc->type));
1460 goto error_parse;
1461 }
1462 used += result;
1463 result = wlp_get_wss_tag(wlp, ptr + used, tag, len - used);
1464 if (result < 0) {
1465 dev_err(dev, "WLP: unable to obtain WSS tag attribute from "
1466 "%s message.\n", wlp_assoc_frame_str(assoc->type));
1467 goto error_parse;
1468 }
1469 used += result;
1470 result = wlp_get_wss_virt(wlp, ptr + used, virt_addr, len - used);
1471 if (result < 0) {
1472 dev_err(dev, "WLP: unable to obtain WSS virtual address "
1473 "attribute from %s message.\n",
1474 wlp_assoc_frame_str(assoc->type));
1475 goto error_parse;
1476 }
1477error_parse:
1478 return result;
1479}
1480
1481/**
1482 * Allocate memory for and populate fields of C1 or C2 association frame
1483 *
1484 * The C1 and C2 association frames appear identical - except for the type.
1485 */
1486static
1487int wlp_build_assoc_c1c2(struct wlp *wlp, struct wlp_wss *wss,
1488 struct sk_buff **skb, enum wlp_assoc_type type)
1489{
1490 struct device *dev = &wlp->rc->uwb_dev.dev;
1491 int result = -ENOMEM;
1492 struct {
1493 struct wlp_frame_assoc c_hdr;
1494 struct wlp_attr_wssid wssid;
1495 } *c;
1496 struct sk_buff *_skb;
1497
1498 _skb = dev_alloc_skb(sizeof(*c));
1499 if (_skb == NULL) {
1500 dev_err(dev, "WLP: Unable to allocate memory for C1/C2 "
1501 "association frame. \n");
1502 goto error_alloc;
1503 }
1504 c = (void *) _skb->data;
1505 c->c_hdr.hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
1506 c->c_hdr.hdr.type = WLP_FRAME_ASSOCIATION;
1507 c->c_hdr.type = type;
1508 wlp_set_version(&c->c_hdr.version, WLP_VERSION);
1509 wlp_set_msg_type(&c->c_hdr.msg_type, type);
1510 wlp_set_wssid(&c->wssid, &wss->wssid);
1511 skb_put(_skb, sizeof(*c));
1512 *skb = _skb;
1513 result = 0;
1514error_alloc:
1515 return result;
1516}
1517
1518
1519static
1520int wlp_build_assoc_c1(struct wlp *wlp, struct wlp_wss *wss,
1521 struct sk_buff **skb)
1522{
1523 return wlp_build_assoc_c1c2(wlp, wss, skb, WLP_ASSOC_C1);
1524}
1525
1526static
1527int wlp_build_assoc_c2(struct wlp *wlp, struct wlp_wss *wss,
1528 struct sk_buff **skb)
1529{
1530 return wlp_build_assoc_c1c2(wlp, wss, skb, WLP_ASSOC_C2);
1531}
1532
1533
1534/**
1535 * Allocate memory for and populate fields of C3 or C4 association frame
1536 *
1537 * The C3 and C4 association frames appear identical - except for the type.
1538 */
1539static
1540int wlp_build_assoc_c3c4(struct wlp *wlp, struct wlp_wss *wss,
1541 struct sk_buff **skb, enum wlp_assoc_type type)
1542{
1543 struct device *dev = &wlp->rc->uwb_dev.dev;
1544 int result = -ENOMEM;
1545 struct {
1546 struct wlp_frame_assoc c_hdr;
1547 struct wlp_attr_wssid wssid;
1548 struct wlp_attr_wss_tag wss_tag;
1549 struct wlp_attr_wss_virt wss_virt;
1550 } *c;
1551 struct sk_buff *_skb;
1552
1553 _skb = dev_alloc_skb(sizeof(*c));
1554 if (_skb == NULL) {
1555 dev_err(dev, "WLP: Unable to allocate memory for C3/C4 "
1556 "association frame. \n");
1557 goto error_alloc;
1558 }
1559 c = (void *) _skb->data;
1560 c->c_hdr.hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
1561 c->c_hdr.hdr.type = WLP_FRAME_ASSOCIATION;
1562 c->c_hdr.type = type;
1563 wlp_set_version(&c->c_hdr.version, WLP_VERSION);
1564 wlp_set_msg_type(&c->c_hdr.msg_type, type);
1565 wlp_set_wssid(&c->wssid, &wss->wssid);
1566 wlp_set_wss_tag(&c->wss_tag, wss->tag);
1567 wlp_set_wss_virt(&c->wss_virt, &wss->virtual_addr);
1568 skb_put(_skb, sizeof(*c));
1569 *skb = _skb;
1570 result = 0;
1571error_alloc:
1572 return result;
1573}
1574
1575static
1576int wlp_build_assoc_c3(struct wlp *wlp, struct wlp_wss *wss,
1577 struct sk_buff **skb)
1578{
1579 return wlp_build_assoc_c3c4(wlp, wss, skb, WLP_ASSOC_C3);
1580}
1581
1582static
1583int wlp_build_assoc_c4(struct wlp *wlp, struct wlp_wss *wss,
1584 struct sk_buff **skb)
1585{
1586 return wlp_build_assoc_c3c4(wlp, wss, skb, WLP_ASSOC_C4);
1587}
1588
1589
1590#define wlp_send_assoc(type, id) \
1591static int wlp_send_assoc_##type(struct wlp *wlp, struct wlp_wss *wss, \
1592 struct uwb_dev_addr *dev_addr) \
1593{ \
1594 struct device *dev = &wlp->rc->uwb_dev.dev; \
1595 int result; \
1596 struct sk_buff *skb = NULL; \
1597 \
1598 /* Build the frame */ \
1599 result = wlp_build_assoc_##type(wlp, wss, &skb); \
1600 if (result < 0) { \
1601 dev_err(dev, "WLP: Unable to construct %s association " \
1602 "frame: %d\n", wlp_assoc_frame_str(id), result);\
1603 goto error_build_assoc; \
1604 } \
1605 /* Send the frame */ \
1606 BUG_ON(wlp->xmit_frame == NULL); \
1607 result = wlp->xmit_frame(wlp, skb, dev_addr); \
1608 if (result < 0) { \
1609 dev_err(dev, "WLP: Unable to transmit %s association " \
1610 "message: %d\n", wlp_assoc_frame_str(id), \
1611 result); \
1612 if (result == -ENXIO) \
1613 dev_err(dev, "WLP: Is network interface " \
1614 "up? \n"); \
1615 goto error_xmit; \
1616 } \
1617 return 0; \
1618error_xmit: \
1619 /* We could try again ... */ \
1620 dev_kfree_skb_any(skb);/*we need to free if tx fails*/ \
1621error_build_assoc: \
1622 return result; \
1623}
1624
1625wlp_send_assoc(d1, WLP_ASSOC_D1)
1626wlp_send_assoc(c1, WLP_ASSOC_C1)
1627wlp_send_assoc(c3, WLP_ASSOC_C3)
1628
1629int wlp_send_assoc_frame(struct wlp *wlp, struct wlp_wss *wss,
1630 struct uwb_dev_addr *dev_addr,
1631 enum wlp_assoc_type type)
1632{
1633 int result = 0;
1634 struct device *dev = &wlp->rc->uwb_dev.dev;
1635 switch (type) {
1636 case WLP_ASSOC_D1:
1637 result = wlp_send_assoc_d1(wlp, wss, dev_addr);
1638 break;
1639 case WLP_ASSOC_C1:
1640 result = wlp_send_assoc_c1(wlp, wss, dev_addr);
1641 break;
1642 case WLP_ASSOC_C3:
1643 result = wlp_send_assoc_c3(wlp, wss, dev_addr);
1644 break;
1645 default:
1646 dev_err(dev, "WLP: Received request to send unknown "
1647 "association message.\n");
1648 result = -EINVAL;
1649 break;
1650 }
1651 return result;
1652}
1653
1654/**
1655 * Handle incoming C1 frame
1656 *
1657 * The frame has already been verified to contain an Association header with
1658 * the correct version number. Parse the incoming frame, construct and send
1659 * a C2 frame in response.
1660 */
1661void wlp_handle_c1_frame(struct work_struct *ws)
1662{
1663 struct wlp_assoc_frame_ctx *frame_ctx = container_of(ws,
1664 struct wlp_assoc_frame_ctx,
1665 ws);
1666 struct wlp *wlp = frame_ctx->wlp;
1667 struct wlp_wss *wss = &wlp->wss;
1668 struct device *dev = &wlp->rc->uwb_dev.dev;
1669 struct wlp_frame_assoc *c1 = (void *) frame_ctx->skb->data;
1670 unsigned int len = frame_ctx->skb->len;
1671 struct uwb_dev_addr *src = &frame_ctx->src;
1672 int result;
1673 struct wlp_uuid wssid;
1674 struct sk_buff *resp = NULL;
1675
1676 /* Parse C1 frame */
1677 mutex_lock(&wss->mutex);
1678 result = wlp_get_wssid(wlp, (void *)c1 + sizeof(*c1), &wssid,
1679 len - sizeof(*c1));
1680 if (result < 0) {
1681 dev_err(dev, "WLP: unable to obtain WSSID from C1 frame.\n");
1682 goto out;
1683 }
1684 if (!memcmp(&wssid, &wss->wssid, sizeof(wssid))
1685 && wss->state == WLP_WSS_STATE_ACTIVE) {
1686 /* Construct C2 frame */
1687 result = wlp_build_assoc_c2(wlp, wss, &resp);
1688 if (result < 0) {
1689 dev_err(dev, "WLP: Unable to construct C2 message.\n");
1690 goto out;
1691 }
1692 } else {
1693 /* Construct F0 frame */
1694 result = wlp_build_assoc_f0(wlp, &resp, WLP_ASSOC_ERROR_INV);
1695 if (result < 0) {
1696 dev_err(dev, "WLP: Unable to construct F0 message.\n");
1697 goto out;
1698 }
1699 }
1700 /* Send C2 frame */
1701 BUG_ON(wlp->xmit_frame == NULL);
1702 result = wlp->xmit_frame(wlp, resp, src);
1703 if (result < 0) {
1704 dev_err(dev, "WLP: Unable to transmit response association "
1705 "message: %d\n", result);
1706 if (result == -ENXIO)
1707 dev_err(dev, "WLP: Is network interface up? \n");
1708 /* We could try again ... */
1709 dev_kfree_skb_any(resp); /* we need to free if tx fails */
1710 }
1711out:
1712 kfree_skb(frame_ctx->skb);
1713 kfree(frame_ctx);
1714 mutex_unlock(&wss->mutex);
1715}
1716
1717/**
1718 * Handle incoming C3 frame
1719 *
1720 * The frame has already been verified to contain an Association header with
1721 * the correct version number. Parse the incoming frame, construct and send
1722 * a C4 frame in response. If the C3 frame identifies a WSS that is locally
1723 * active then we connect to this neighbor (add it to our EDA cache).
1724 */
1725void wlp_handle_c3_frame(struct work_struct *ws)
1726{
1727 struct wlp_assoc_frame_ctx *frame_ctx = container_of(ws,
1728 struct wlp_assoc_frame_ctx,
1729 ws);
1730 struct wlp *wlp = frame_ctx->wlp;
1731 struct wlp_wss *wss = &wlp->wss;
1732 struct device *dev = &wlp->rc->uwb_dev.dev;
1733 struct sk_buff *skb = frame_ctx->skb;
1734 struct uwb_dev_addr *src = &frame_ctx->src;
1735 int result;
1736 struct sk_buff *resp = NULL;
1737 struct wlp_uuid wssid;
1738 u8 tag;
1739 struct uwb_mac_addr virt_addr;
1740
1741 /* Parse C3 frame */
1742 mutex_lock(&wss->mutex);
1743 result = wlp_parse_c3c4_frame(wlp, skb, &wssid, &tag, &virt_addr);
1744 if (result < 0) {
1745 dev_err(dev, "WLP: unable to obtain values from C3 frame.\n");
1746 goto out;
1747 }
1748 if (!memcmp(&wssid, &wss->wssid, sizeof(wssid))
1749 && wss->state >= WLP_WSS_STATE_ACTIVE) {
1750 result = wlp_eda_update_node(&wlp->eda, src, wss,
1751 (void *) virt_addr.data, tag,
1752 WLP_WSS_CONNECTED);
1753 if (result < 0) {
1754 dev_err(dev, "WLP: Unable to update EDA cache "
1755 "with new connected neighbor information.\n");
1756 result = wlp_build_assoc_f0(wlp, &resp,
1757 WLP_ASSOC_ERROR_INT);
1758 if (result < 0) {
1759 dev_err(dev, "WLP: Unable to construct F0 "
1760 "message.\n");
1761 goto out;
1762 }
1763 } else {
1764 wss->state = WLP_WSS_STATE_CONNECTED;
1765 /* Construct C4 frame */
1766 result = wlp_build_assoc_c4(wlp, wss, &resp);
1767 if (result < 0) {
1768 dev_err(dev, "WLP: Unable to construct C4 "
1769 "message.\n");
1770 goto out;
1771 }
1772 }
1773 } else {
1774 /* Construct F0 frame */
1775 result = wlp_build_assoc_f0(wlp, &resp, WLP_ASSOC_ERROR_INV);
1776 if (result < 0) {
1777 dev_err(dev, "WLP: Unable to construct F0 message.\n");
1778 goto out;
1779 }
1780 }
1781 /* Send C4 frame */
1782 BUG_ON(wlp->xmit_frame == NULL);
1783 result = wlp->xmit_frame(wlp, resp, src);
1784 if (result < 0) {
1785 dev_err(dev, "WLP: Unable to transmit response association "
1786 "message: %d\n", result);
1787 if (result == -ENXIO)
1788 dev_err(dev, "WLP: Is network interface up? \n");
1789 /* We could try again ... */
1790 dev_kfree_skb_any(resp); /* we need to free if tx fails */
1791 }
1792out:
1793 kfree_skb(frame_ctx->skb);
1794 kfree(frame_ctx);
1795 mutex_unlock(&wss->mutex);
1796}
1797
1798
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-05 16:55:39 -0500