Line data Source code
1 : /*
2 : * P2P - IE parser
3 : * Copyright (c) 2009-2010, Atheros Communications
4 : *
5 : * This software may be distributed under the terms of the BSD license.
6 : * See README for more details.
7 : */
8 :
9 : #include "includes.h"
10 :
11 : #include "common.h"
12 : #include "common/ieee802_11_defs.h"
13 : #include "common/ieee802_11_common.h"
14 : #include "wps/wps_i.h"
15 : #include "p2p_i.h"
16 :
17 :
18 16406 : static int p2p_parse_attribute(u8 id, const u8 *data, u16 len,
19 : struct p2p_message *msg)
20 : {
21 : const u8 *pos;
22 : size_t i, nlen;
23 : char devtype[WPS_DEV_TYPE_BUFSIZE];
24 :
25 16406 : switch (id) {
26 : case P2P_ATTR_CAPABILITY:
27 6421 : if (len < 2) {
28 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Capability "
29 : "attribute (length %d)", len);
30 1 : return -1;
31 : }
32 6420 : msg->capability = data;
33 12840 : wpa_printf(MSG_DEBUG, "P2P: * Device Capability %02x "
34 : "Group Capability %02x",
35 12840 : data[0], data[1]);
36 6420 : break;
37 : case P2P_ATTR_DEVICE_ID:
38 154 : if (len < ETH_ALEN) {
39 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Device ID "
40 : "attribute (length %d)", len);
41 1 : return -1;
42 : }
43 153 : msg->device_id = data;
44 918 : wpa_printf(MSG_DEBUG, "P2P: * Device ID " MACSTR,
45 918 : MAC2STR(msg->device_id));
46 153 : break;
47 : case P2P_ATTR_GROUP_OWNER_INTENT:
48 310 : if (len < 1) {
49 1 : wpa_printf(MSG_DEBUG, "P2P: Too short GO Intent "
50 : "attribute (length %d)", len);
51 1 : return -1;
52 : }
53 309 : msg->go_intent = data;
54 618 : wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u "
55 618 : "Tie breaker %u", data[0] >> 1, data[0] & 0x01);
56 309 : break;
57 : case P2P_ATTR_STATUS:
58 336 : if (len < 1) {
59 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Status "
60 : "attribute (length %d)", len);
61 1 : return -1;
62 : }
63 335 : msg->status = data;
64 335 : wpa_printf(MSG_DEBUG, "P2P: * Status: %d", data[0]);
65 335 : break;
66 : case P2P_ATTR_LISTEN_CHANNEL:
67 2313 : if (len == 0) {
68 1 : wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Ignore "
69 : "null channel");
70 1 : break;
71 : }
72 2312 : if (len < 5) {
73 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Listen Channel "
74 : "attribute (length %d)", len);
75 1 : return -1;
76 : }
77 2311 : msg->listen_channel = data;
78 11555 : wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: "
79 : "Country %c%c(0x%02x) Regulatory "
80 4622 : "Class %d Channel Number %d", data[0], data[1],
81 6933 : data[2], data[3], data[4]);
82 2311 : break;
83 : case P2P_ATTR_OPERATING_CHANNEL:
84 457 : if (len == 0) {
85 1 : wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
86 : "Ignore null channel");
87 1 : break;
88 : }
89 456 : if (len < 5) {
90 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Operating "
91 : "Channel attribute (length %d)", len);
92 1 : return -1;
93 : }
94 455 : msg->operating_channel = data;
95 2275 : wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
96 : "Country %c%c(0x%02x) Regulatory "
97 910 : "Class %d Channel Number %d", data[0], data[1],
98 1365 : data[2], data[3], data[4]);
99 455 : break;
100 : case P2P_ATTR_CHANNEL_LIST:
101 554 : if (len < 3) {
102 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Channel List "
103 : "attribute (length %d)", len);
104 1 : return -1;
105 : }
106 553 : msg->channel_list = data;
107 553 : msg->channel_list_len = len;
108 1659 : wpa_printf(MSG_DEBUG, "P2P: * Channel List: Country String "
109 1659 : "'%c%c(0x%02x)'", data[0], data[1], data[2]);
110 1106 : wpa_hexdump(MSG_MSGDUMP, "P2P: Channel List",
111 1106 : msg->channel_list, msg->channel_list_len);
112 553 : break;
113 : case P2P_ATTR_GROUP_INFO:
114 151 : msg->group_info = data;
115 151 : msg->group_info_len = len;
116 151 : wpa_printf(MSG_DEBUG, "P2P: * Group Info");
117 151 : break;
118 : case P2P_ATTR_DEVICE_INFO:
119 4121 : if (len < ETH_ALEN + 2 + 8 + 1) {
120 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Device Info "
121 : "attribute (length %d)", len);
122 1 : return -1;
123 : }
124 4120 : msg->p2p_device_info = data;
125 4120 : msg->p2p_device_info_len = len;
126 4120 : pos = data;
127 4120 : msg->p2p_device_addr = pos;
128 4120 : pos += ETH_ALEN;
129 4120 : msg->config_methods = WPA_GET_BE16(pos);
130 4120 : pos += 2;
131 4120 : msg->pri_dev_type = pos;
132 4120 : pos += 8;
133 4120 : msg->num_sec_dev_types = *pos++;
134 4120 : if (msg->num_sec_dev_types * 8 > data + len - pos) {
135 1 : wpa_printf(MSG_DEBUG, "P2P: Device Info underflow");
136 1 : return -1;
137 : }
138 4119 : pos += msg->num_sec_dev_types * 8;
139 4119 : if (data + len - pos < 4) {
140 1 : wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
141 1 : "length %d", (int) (data + len - pos));
142 1 : return -1;
143 : }
144 4118 : if (WPA_GET_BE16(pos) != ATTR_DEV_NAME) {
145 1 : wpa_hexdump(MSG_DEBUG, "P2P: Unexpected Device Name "
146 : "header", pos, 4);
147 1 : return -1;
148 : }
149 4117 : pos += 2;
150 4117 : nlen = WPA_GET_BE16(pos);
151 4117 : pos += 2;
152 4117 : if (data + len - pos < (int) nlen || nlen > 32) {
153 3 : wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
154 : "length %d (buf len %d)", (int) nlen,
155 3 : (int) (data + len - pos));
156 3 : return -1;
157 : }
158 4114 : os_memcpy(msg->device_name, pos, nlen);
159 4114 : msg->device_name[nlen] = '\0';
160 35944 : for (i = 0; i < nlen; i++) {
161 31831 : if (msg->device_name[i] == '\0')
162 1 : break;
163 63660 : if (msg->device_name[i] > 0 &&
164 31830 : msg->device_name[i] < 32)
165 1 : msg->device_name[i] = '_';
166 : }
167 32912 : wpa_printf(MSG_DEBUG, "P2P: * Device Info: addr " MACSTR
168 : " primary device type %s device name '%s' "
169 : "config methods 0x%x",
170 24684 : MAC2STR(msg->p2p_device_addr),
171 : wps_dev_type_bin2str(msg->pri_dev_type, devtype,
172 : sizeof(devtype)),
173 8228 : msg->device_name, msg->config_methods);
174 4114 : break;
175 : case P2P_ATTR_CONFIGURATION_TIMEOUT:
176 450 : if (len < 2) {
177 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Configuration "
178 : "Timeout attribute (length %d)", len);
179 1 : return -1;
180 : }
181 449 : msg->config_timeout = data;
182 449 : wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout");
183 449 : break;
184 : case P2P_ATTR_INTENDED_INTERFACE_ADDR:
185 345 : if (len < ETH_ALEN) {
186 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Intended P2P "
187 : "Interface Address attribute (length %d)",
188 : len);
189 1 : return -1;
190 : }
191 344 : msg->intended_addr = data;
192 2064 : wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address: "
193 2064 : MACSTR, MAC2STR(msg->intended_addr));
194 344 : break;
195 : case P2P_ATTR_GROUP_BSSID:
196 58 : if (len < ETH_ALEN) {
197 1 : wpa_printf(MSG_DEBUG, "P2P: Too short P2P Group BSSID "
198 : "attribute (length %d)", len);
199 1 : return -1;
200 : }
201 57 : msg->group_bssid = data;
202 342 : wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID: " MACSTR,
203 342 : MAC2STR(msg->group_bssid));
204 57 : break;
205 : case P2P_ATTR_GROUP_ID:
206 311 : if (len < ETH_ALEN || len > ETH_ALEN + 32) {
207 2 : wpa_printf(MSG_DEBUG, "P2P: Invalid P2P Group ID "
208 : "attribute length %d", len);
209 2 : return -1;
210 : }
211 309 : msg->group_id = data;
212 309 : msg->group_id_len = len;
213 1854 : wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID: Device Address "
214 1854 : MACSTR, MAC2STR(msg->group_id));
215 618 : wpa_hexdump_ascii(MSG_DEBUG, "P2P: * P2P Group ID: SSID",
216 309 : msg->group_id + ETH_ALEN,
217 309 : msg->group_id_len - ETH_ALEN);
218 309 : break;
219 : case P2P_ATTR_INVITATION_FLAGS:
220 62 : if (len < 1) {
221 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Invitation "
222 : "Flag attribute (length %d)", len);
223 1 : return -1;
224 : }
225 61 : msg->invitation_flags = data;
226 61 : wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x",
227 61 : data[0]);
228 61 : break;
229 : case P2P_ATTR_MANAGEABILITY:
230 6 : if (len < 1) {
231 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Manageability "
232 : "attribute (length %d)", len);
233 1 : return -1;
234 : }
235 5 : msg->manageability = data;
236 5 : wpa_printf(MSG_DEBUG, "P2P: * Manageability: bitmap 0x%x",
237 5 : data[0]);
238 5 : break;
239 : case P2P_ATTR_NOTICE_OF_ABSENCE:
240 11 : if (len < 2) {
241 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Notice of "
242 : "Absence attribute (length %d)", len);
243 1 : return -1;
244 : }
245 10 : msg->noa = data;
246 10 : msg->noa_len = len;
247 10 : wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
248 10 : break;
249 : case P2P_ATTR_EXT_LISTEN_TIMING:
250 31 : if (len < 4) {
251 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Extended Listen "
252 : "Timing attribute (length %d)", len);
253 1 : return -1;
254 : }
255 30 : msg->ext_listen_timing = data;
256 60 : wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing "
257 : "(period %u msec interval %u msec)",
258 30 : WPA_GET_LE16(msg->ext_listen_timing),
259 30 : WPA_GET_LE16(msg->ext_listen_timing + 2));
260 30 : break;
261 : case P2P_ATTR_MINOR_REASON_CODE:
262 4 : if (len < 1) {
263 1 : wpa_printf(MSG_DEBUG, "P2P: Too short Minor Reason "
264 : "Code attribute (length %d)", len);
265 1 : return -1;
266 : }
267 3 : msg->minor_reason_code = data;
268 3 : wpa_printf(MSG_DEBUG, "P2P: * Minor Reason Code: %u",
269 3 : *msg->minor_reason_code);
270 3 : break;
271 : case P2P_ATTR_OOB_GO_NEG_CHANNEL:
272 26 : if (len < 6) {
273 1 : wpa_printf(MSG_DEBUG, "P2P: Too short OOB GO Neg "
274 : "Channel attribute (length %d)", len);
275 1 : return -1;
276 : }
277 25 : msg->oob_go_neg_channel = data;
278 150 : wpa_printf(MSG_DEBUG, "P2P: * OOB GO Neg Channel: "
279 : "Country %c%c(0x%02x) Operating Class %d "
280 : "Channel Number %d Role %d",
281 125 : data[0], data[1], data[2], data[3], data[4],
282 25 : data[5]);
283 25 : break;
284 : case P2P_ATTR_SERVICE_HASH:
285 54 : if (len < P2PS_HASH_LEN) {
286 0 : wpa_printf(MSG_DEBUG,
287 : "P2P: Too short Service Hash (length %u)",
288 : len);
289 0 : return -1;
290 : }
291 54 : msg->service_hash_count = len / P2PS_HASH_LEN;
292 54 : msg->service_hash = data;
293 54 : wpa_hexdump(MSG_DEBUG, "P2P: * Service Hash(s)", data, len);
294 54 : break;
295 : case P2P_ATTR_SESSION_INFORMATION_DATA:
296 8 : msg->session_info = data;
297 8 : msg->session_info_len = len;
298 8 : wpa_printf(MSG_DEBUG, "P2P: * Service Instance: %u bytes - %p",
299 : len, data);
300 8 : break;
301 : case P2P_ATTR_CONNECTION_CAPABILITY:
302 45 : if (len < 1) {
303 0 : wpa_printf(MSG_DEBUG,
304 : "P2P: Too short Connection Capability (length %u)",
305 : len);
306 0 : return -1;
307 : }
308 45 : msg->conn_cap = data;
309 45 : wpa_printf(MSG_DEBUG, "P2P: * Connection Capability: 0x%x",
310 45 : *msg->conn_cap);
311 45 : break;
312 : case P2P_ATTR_ADVERTISEMENT_ID:
313 50 : if (len < 10) {
314 0 : wpa_printf(MSG_DEBUG,
315 : "P2P: Too short Advertisement ID (length %u)",
316 : len);
317 0 : return -1;
318 : }
319 50 : msg->adv_id = data;
320 50 : msg->adv_mac = &data[sizeof(u32)];
321 50 : wpa_printf(MSG_DEBUG, "P2P: * Advertisement ID %x",
322 : WPA_GET_LE32(data));
323 50 : break;
324 : case P2P_ATTR_ADVERTISED_SERVICE:
325 25 : if (len < 8) {
326 0 : wpa_printf(MSG_DEBUG,
327 : "P2P: Too short Service Instance (length %u)",
328 : len);
329 0 : return -1;
330 : }
331 25 : msg->adv_service_instance = data;
332 25 : msg->adv_service_instance_len = len;
333 25 : if (len <= 255 + 8) {
334 : char str[256];
335 : u8 namelen;
336 :
337 25 : namelen = data[6];
338 25 : if (namelen > len - 7)
339 0 : break;
340 25 : os_memcpy(str, &data[7], namelen);
341 25 : str[namelen] = '\0';
342 25 : wpa_printf(MSG_DEBUG, "P2P: * Service Instance: %x-%s",
343 : WPA_GET_LE32(data), str);
344 : } else {
345 0 : wpa_printf(MSG_DEBUG, "P2P: * Service Instance: %p",
346 : data);
347 : }
348 25 : break;
349 : case P2P_ATTR_SESSION_ID:
350 50 : if (len < sizeof(u32) + ETH_ALEN) {
351 0 : wpa_printf(MSG_DEBUG,
352 : "P2P: Too short Session ID Info (length %u)",
353 : len);
354 0 : return -1;
355 : }
356 50 : msg->session_id = data;
357 50 : msg->session_mac = &data[sizeof(u32)];
358 300 : wpa_printf(MSG_DEBUG, "P2P: * Session ID: %x " MACSTR,
359 300 : WPA_GET_LE32(data), MAC2STR(msg->session_mac));
360 50 : break;
361 : case P2P_ATTR_FEATURE_CAPABILITY:
362 50 : if (!len) {
363 0 : wpa_printf(MSG_DEBUG,
364 : "P2P: Too short Feature Capability (length %u)",
365 : len);
366 0 : return -1;
367 : }
368 50 : msg->feature_cap = data;
369 50 : msg->feature_cap_len = len;
370 50 : wpa_printf(MSG_DEBUG, "P2P: * Feature Cap (length=%u)", len);
371 50 : break;
372 : case P2P_ATTR_PERSISTENT_GROUP:
373 : {
374 2 : if (len < ETH_ALEN) {
375 0 : wpa_printf(MSG_DEBUG,
376 : "P2P: Too short Persistent Group Info (length %u)",
377 : len);
378 0 : return -1;
379 : }
380 :
381 2 : msg->persistent_dev = data;
382 2 : msg->persistent_ssid_len = len - ETH_ALEN;
383 2 : msg->persistent_ssid = &data[ETH_ALEN];
384 14 : wpa_printf(MSG_DEBUG, "P2P: * Persistent Group: " MACSTR " %s",
385 12 : MAC2STR(msg->persistent_dev),
386 : wpa_ssid_txt(msg->persistent_ssid,
387 : msg->persistent_ssid_len));
388 2 : break;
389 : }
390 : default:
391 1 : wpa_printf(MSG_DEBUG, "P2P: Skipped unknown attribute %d "
392 : "(length %d)", id, len);
393 1 : break;
394 : }
395 :
396 16381 : return 0;
397 : }
398 :
399 :
400 : /**
401 : * p2p_parse_p2p_ie - Parse P2P IE
402 : * @buf: Concatenated P2P IE(s) payload
403 : * @msg: Buffer for returning parsed attributes
404 : * Returns: 0 on success, -1 on failure
405 : *
406 : * Note: Caller is responsible for clearing the msg data structure before
407 : * calling this function.
408 : */
409 6601 : int p2p_parse_p2p_ie(const struct wpabuf *buf, struct p2p_message *msg)
410 : {
411 6601 : const u8 *pos = wpabuf_head_u8(buf);
412 6601 : const u8 *end = pos + wpabuf_len(buf);
413 :
414 6601 : wpa_printf(MSG_DEBUG, "P2P: Parsing P2P IE");
415 :
416 29583 : while (pos < end) {
417 : u16 attr_len;
418 : u8 id;
419 :
420 16413 : if (end - pos < 3) {
421 5 : wpa_printf(MSG_DEBUG, "P2P: Invalid P2P attribute");
422 5 : return -1;
423 : }
424 16408 : id = *pos++;
425 16408 : attr_len = WPA_GET_LE16(pos);
426 16408 : pos += 2;
427 16408 : wpa_printf(MSG_DEBUG, "P2P: Attribute %d length %u",
428 : id, attr_len);
429 16408 : if (attr_len > end - pos) {
430 2 : wpa_printf(MSG_DEBUG, "P2P: Attribute underflow "
431 : "(len=%u left=%d)",
432 2 : attr_len, (int) (end - pos));
433 2 : wpa_hexdump(MSG_MSGDUMP, "P2P: Data", pos, end - pos);
434 2 : return -1;
435 : }
436 16406 : if (p2p_parse_attribute(id, pos, attr_len, msg))
437 25 : return -1;
438 16381 : pos += attr_len;
439 : }
440 :
441 6569 : return 0;
442 : }
443 :
444 :
445 3422 : static int p2p_parse_wps_ie(const struct wpabuf *buf, struct p2p_message *msg)
446 : {
447 : struct wps_parse_attr attr;
448 : int i;
449 :
450 3422 : wpa_printf(MSG_DEBUG, "P2P: Parsing WPS IE");
451 3422 : if (wps_parse_msg(buf, &attr))
452 0 : return -1;
453 6121 : if (attr.dev_name && attr.dev_name_len < sizeof(msg->device_name) &&
454 2699 : !msg->device_name[0])
455 2699 : os_memcpy(msg->device_name, attr.dev_name, attr.dev_name_len);
456 3422 : if (attr.config_methods) {
457 2919 : msg->wps_config_methods =
458 2919 : WPA_GET_BE16(attr.config_methods);
459 2919 : wpa_printf(MSG_DEBUG, "P2P: Config Methods (WPS): 0x%x",
460 2919 : msg->wps_config_methods);
461 : }
462 3422 : if (attr.dev_password_id) {
463 2380 : msg->dev_password_id = WPA_GET_BE16(attr.dev_password_id);
464 2380 : wpa_printf(MSG_DEBUG, "P2P: Device Password ID: %d",
465 2380 : msg->dev_password_id);
466 2380 : msg->dev_password_id_present = 1;
467 : }
468 3422 : if (attr.primary_dev_type) {
469 : char devtype[WPS_DEV_TYPE_BUFSIZE];
470 2699 : msg->wps_pri_dev_type = attr.primary_dev_type;
471 2699 : wpa_printf(MSG_DEBUG, "P2P: Primary Device Type (WPS): %s",
472 : wps_dev_type_bin2str(msg->wps_pri_dev_type, devtype,
473 : sizeof(devtype)));
474 : }
475 3422 : if (attr.sec_dev_type_list) {
476 65 : msg->wps_sec_dev_type_list = attr.sec_dev_type_list;
477 65 : msg->wps_sec_dev_type_list_len = attr.sec_dev_type_list_len;
478 : }
479 :
480 37642 : for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
481 34220 : msg->wps_vendor_ext[i] = attr.vendor_ext[i];
482 34220 : msg->wps_vendor_ext_len[i] = attr.vendor_ext_len[i];
483 : }
484 :
485 3422 : msg->manufacturer = attr.manufacturer;
486 3422 : msg->manufacturer_len = attr.manufacturer_len;
487 3422 : msg->model_name = attr.model_name;
488 3422 : msg->model_name_len = attr.model_name_len;
489 3422 : msg->model_number = attr.model_number;
490 3422 : msg->model_number_len = attr.model_number_len;
491 3422 : msg->serial_number = attr.serial_number;
492 3422 : msg->serial_number_len = attr.serial_number_len;
493 :
494 3422 : msg->oob_dev_password = attr.oob_dev_password;
495 3422 : msg->oob_dev_password_len = attr.oob_dev_password_len;
496 :
497 3422 : return 0;
498 : }
499 :
500 :
501 : /**
502 : * p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE)
503 : * @data: IEs from the message
504 : * @len: Length of data buffer in octets
505 : * @msg: Buffer for returning parsed attributes
506 : * Returns: 0 on success, -1 on failure
507 : *
508 : * Note: Caller is responsible for clearing the msg data structure before
509 : * calling this function.
510 : *
511 : * Note: Caller must free temporary memory allocations by calling
512 : * p2p_parse_free() when the parsed data is not needed anymore.
513 : */
514 3979 : int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg)
515 : {
516 : struct ieee802_11_elems elems;
517 :
518 3979 : ieee802_11_parse_elems(data, len, &elems, 0);
519 3979 : if (elems.ds_params && elems.ds_params_len >= 1)
520 2736 : msg->ds_params = elems.ds_params;
521 3979 : if (elems.ssid)
522 3169 : msg->ssid = elems.ssid - 2;
523 :
524 3979 : msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len,
525 : WPS_DEV_OUI_WFA);
526 7376 : if (msg->wps_attributes &&
527 3397 : p2p_parse_wps_ie(msg->wps_attributes, msg)) {
528 0 : p2p_parse_free(msg);
529 0 : return -1;
530 : }
531 :
532 3979 : msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len,
533 : P2P_IE_VENDOR_TYPE);
534 7785 : if (msg->p2p_attributes &&
535 3806 : p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
536 32 : wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
537 32 : if (msg->p2p_attributes)
538 32 : wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
539 32 : msg->p2p_attributes);
540 32 : p2p_parse_free(msg);
541 32 : return -1;
542 : }
543 :
544 : #ifdef CONFIG_WIFI_DISPLAY
545 3947 : if (elems.wfd) {
546 111 : msg->wfd_subelems = ieee802_11_vendor_ie_concat(
547 : data, len, WFD_IE_VENDOR_TYPE);
548 : }
549 : #endif /* CONFIG_WIFI_DISPLAY */
550 :
551 3947 : return 0;
552 : }
553 :
554 :
555 : /**
556 : * p2p_parse - Parse a P2P Action frame contents
557 : * @data: Action frame payload after Category and Code fields
558 : * @len: Length of data buffer in octets
559 : * @msg: Buffer for returning parsed attributes
560 : * Returns: 0 on success, -1 on failure
561 : *
562 : * Note: Caller must free temporary memory allocations by calling
563 : * p2p_parse_free() when the parsed data is not needed anymore.
564 : */
565 732 : int p2p_parse(const u8 *data, size_t len, struct p2p_message *msg)
566 : {
567 732 : os_memset(msg, 0, sizeof(*msg));
568 732 : wpa_printf(MSG_DEBUG, "P2P: Parsing the received message");
569 732 : if (len < 1) {
570 1 : wpa_printf(MSG_DEBUG, "P2P: No Dialog Token in the message");
571 1 : return -1;
572 : }
573 731 : msg->dialog_token = data[0];
574 731 : wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", msg->dialog_token);
575 :
576 731 : return p2p_parse_ies(data + 1, len - 1, msg);
577 : }
578 :
579 :
580 25 : int p2p_parse_ies_separate(const u8 *wsc, size_t wsc_len, const u8 *p2p,
581 : size_t p2p_len, struct p2p_message *msg)
582 : {
583 25 : os_memset(msg, 0, sizeof(*msg));
584 :
585 25 : msg->wps_attributes = wpabuf_alloc_copy(wsc, wsc_len);
586 50 : if (msg->wps_attributes &&
587 25 : p2p_parse_wps_ie(msg->wps_attributes, msg)) {
588 0 : p2p_parse_free(msg);
589 0 : return -1;
590 : }
591 :
592 25 : msg->p2p_attributes = wpabuf_alloc_copy(p2p, p2p_len);
593 50 : if (msg->p2p_attributes &&
594 25 : p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
595 0 : wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
596 0 : if (msg->p2p_attributes)
597 0 : wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
598 0 : msg->p2p_attributes);
599 0 : p2p_parse_free(msg);
600 0 : return -1;
601 : }
602 :
603 25 : return 0;
604 : }
605 :
606 :
607 : /**
608 : * p2p_parse_free - Free temporary data from P2P parsing
609 : * @msg: Parsed attributes
610 : */
611 4004 : void p2p_parse_free(struct p2p_message *msg)
612 : {
613 4004 : wpabuf_free(msg->p2p_attributes);
614 4004 : msg->p2p_attributes = NULL;
615 4004 : wpabuf_free(msg->wps_attributes);
616 4004 : msg->wps_attributes = NULL;
617 : #ifdef CONFIG_WIFI_DISPLAY
618 4004 : wpabuf_free(msg->wfd_subelems);
619 4004 : msg->wfd_subelems = NULL;
620 : #endif /* CONFIG_WIFI_DISPLAY */
621 4004 : }
622 :
623 :
624 36 : int p2p_group_info_parse(const u8 *gi, size_t gi_len,
625 : struct p2p_group_info *info)
626 : {
627 : const u8 *g, *gend;
628 :
629 36 : os_memset(info, 0, sizeof(*info));
630 36 : if (gi == NULL)
631 6 : return 0;
632 :
633 30 : g = gi;
634 30 : gend = gi + gi_len;
635 90 : while (g < gend) {
636 : struct p2p_client_info *cli;
637 : const u8 *t, *cend;
638 : int count;
639 :
640 30 : cli = &info->client[info->num_clients];
641 30 : cend = g + 1 + g[0];
642 30 : if (cend > gend)
643 0 : return -1; /* invalid data */
644 : /* g at start of P2P Client Info Descriptor */
645 : /* t at Device Capability Bitmap */
646 30 : t = g + 1 + 2 * ETH_ALEN;
647 30 : if (t > cend)
648 0 : return -1; /* invalid data */
649 30 : cli->p2p_device_addr = g + 1;
650 30 : cli->p2p_interface_addr = g + 1 + ETH_ALEN;
651 30 : cli->dev_capab = t[0];
652 :
653 30 : if (t + 1 + 2 + 8 + 1 > cend)
654 0 : return -1; /* invalid data */
655 :
656 30 : cli->config_methods = WPA_GET_BE16(&t[1]);
657 30 : cli->pri_dev_type = &t[3];
658 :
659 30 : t += 1 + 2 + 8;
660 : /* t at Number of Secondary Device Types */
661 30 : cli->num_sec_dev_types = *t++;
662 30 : if (t + 8 * cli->num_sec_dev_types > cend)
663 0 : return -1; /* invalid data */
664 30 : cli->sec_dev_types = t;
665 30 : t += 8 * cli->num_sec_dev_types;
666 :
667 : /* t at Device Name in WPS TLV format */
668 30 : if (t + 2 + 2 > cend)
669 0 : return -1; /* invalid data */
670 30 : if (WPA_GET_BE16(t) != ATTR_DEV_NAME)
671 0 : return -1; /* invalid Device Name TLV */
672 30 : t += 2;
673 30 : count = WPA_GET_BE16(t);
674 30 : t += 2;
675 30 : if (count > cend - t)
676 0 : return -1; /* invalid Device Name TLV */
677 30 : if (count >= 32)
678 0 : count = 32;
679 30 : cli->dev_name = (const char *) t;
680 30 : cli->dev_name_len = count;
681 :
682 30 : g = cend;
683 :
684 30 : info->num_clients++;
685 30 : if (info->num_clients == P2P_MAX_GROUP_ENTRIES)
686 0 : return -1;
687 : }
688 :
689 30 : return 0;
690 : }
691 :
692 :
693 7 : static int p2p_group_info_text(const u8 *gi, size_t gi_len, char *buf,
694 : char *end)
695 : {
696 7 : char *pos = buf;
697 : int ret;
698 : struct p2p_group_info info;
699 : unsigned int i;
700 :
701 7 : if (p2p_group_info_parse(gi, gi_len, &info) < 0)
702 0 : return 0;
703 :
704 16 : for (i = 0; i < info.num_clients; i++) {
705 : struct p2p_client_info *cli;
706 : char name[33];
707 : char devtype[WPS_DEV_TYPE_BUFSIZE];
708 : u8 s;
709 : int count;
710 :
711 1 : cli = &info.client[i];
712 12 : ret = os_snprintf(pos, end - pos, "p2p_group_client: "
713 : "dev=" MACSTR " iface=" MACSTR,
714 6 : MAC2STR(cli->p2p_device_addr),
715 6 : MAC2STR(cli->p2p_interface_addr));
716 1 : if (os_snprintf_error(end - pos, ret))
717 0 : return pos - buf;
718 1 : pos += ret;
719 :
720 3 : ret = os_snprintf(pos, end - pos,
721 : " dev_capab=0x%x config_methods=0x%x "
722 : "dev_type=%s",
723 2 : cli->dev_capab, cli->config_methods,
724 : wps_dev_type_bin2str(cli->pri_dev_type,
725 : devtype,
726 : sizeof(devtype)));
727 1 : if (os_snprintf_error(end - pos, ret))
728 0 : return pos - buf;
729 1 : pos += ret;
730 :
731 1 : for (s = 0; s < cli->num_sec_dev_types; s++) {
732 0 : ret = os_snprintf(pos, end - pos, " dev_type=%s",
733 : wps_dev_type_bin2str(
734 0 : &cli->sec_dev_types[s * 8],
735 : devtype, sizeof(devtype)));
736 0 : if (os_snprintf_error(end - pos, ret))
737 0 : return pos - buf;
738 0 : pos += ret;
739 : }
740 :
741 1 : os_memcpy(name, cli->dev_name, cli->dev_name_len);
742 1 : name[cli->dev_name_len] = '\0';
743 1 : count = (int) cli->dev_name_len - 1;
744 10 : while (count >= 0) {
745 8 : if (name[count] > 0 && name[count] < 32)
746 0 : name[count] = '_';
747 8 : count--;
748 : }
749 :
750 1 : ret = os_snprintf(pos, end - pos, " dev_name='%s'\n", name);
751 1 : if (os_snprintf_error(end - pos, ret))
752 0 : return pos - buf;
753 1 : pos += ret;
754 : }
755 :
756 7 : return pos - buf;
757 : }
758 :
759 :
760 : /**
761 : * p2p_attr_text - Build text format description of P2P IE attributes
762 : * @data: P2P IE contents
763 : * @buf: Buffer for returning text
764 : * @end: Pointer to the end of the buf area
765 : * Returns: Number of octets written to the buffer or -1 on faikure
766 : *
767 : * This function can be used to parse P2P IE contents into text format
768 : * field=value lines.
769 : */
770 7 : int p2p_attr_text(struct wpabuf *data, char *buf, char *end)
771 : {
772 : struct p2p_message msg;
773 7 : char *pos = buf;
774 : int ret;
775 :
776 7 : os_memset(&msg, 0, sizeof(msg));
777 7 : if (p2p_parse_p2p_ie(data, &msg))
778 0 : return -1;
779 :
780 7 : if (msg.capability) {
781 14 : ret = os_snprintf(pos, end - pos,
782 : "p2p_dev_capab=0x%x\n"
783 : "p2p_group_capab=0x%x\n",
784 14 : msg.capability[0], msg.capability[1]);
785 7 : if (os_snprintf_error(end - pos, ret))
786 0 : return pos - buf;
787 7 : pos += ret;
788 : }
789 :
790 7 : if (msg.pri_dev_type) {
791 : char devtype[WPS_DEV_TYPE_BUFSIZE];
792 7 : ret = os_snprintf(pos, end - pos,
793 : "p2p_primary_device_type=%s\n",
794 : wps_dev_type_bin2str(msg.pri_dev_type,
795 : devtype,
796 : sizeof(devtype)));
797 7 : if (os_snprintf_error(end - pos, ret))
798 0 : return pos - buf;
799 7 : pos += ret;
800 : }
801 :
802 7 : ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n",
803 : msg.device_name);
804 7 : if (os_snprintf_error(end - pos, ret))
805 0 : return pos - buf;
806 7 : pos += ret;
807 :
808 7 : if (msg.p2p_device_addr) {
809 42 : ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR
810 : "\n",
811 42 : MAC2STR(msg.p2p_device_addr));
812 7 : if (os_snprintf_error(end - pos, ret))
813 0 : return pos - buf;
814 7 : pos += ret;
815 : }
816 :
817 7 : ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n",
818 7 : msg.config_methods);
819 7 : if (os_snprintf_error(end - pos, ret))
820 0 : return pos - buf;
821 7 : pos += ret;
822 :
823 7 : ret = p2p_group_info_text(msg.group_info, msg.group_info_len,
824 : pos, end);
825 7 : if (ret < 0)
826 0 : return pos - buf;
827 7 : pos += ret;
828 :
829 7 : return pos - buf;
830 : }
831 :
832 :
833 4 : int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie)
834 : {
835 : struct p2p_message msg;
836 :
837 4 : os_memset(&msg, 0, sizeof(msg));
838 4 : if (p2p_parse_p2p_ie(p2p_ie, &msg))
839 0 : return 0;
840 :
841 4 : if (!msg.manageability)
842 2 : return 0;
843 :
844 2 : return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTION_PERMITTED);
845 : }
846 :
847 :
848 850 : u8 p2p_get_group_capab(const struct wpabuf *p2p_ie)
849 : {
850 : struct p2p_message msg;
851 :
852 850 : os_memset(&msg, 0, sizeof(msg));
853 850 : if (p2p_parse_p2p_ie(p2p_ie, &msg))
854 0 : return 0;
855 :
856 850 : if (!msg.capability)
857 0 : return 0;
858 :
859 850 : return msg.capability[1];
860 : }
861 :
862 :
863 1021 : const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie)
864 : {
865 : struct p2p_message msg;
866 :
867 1021 : os_memset(&msg, 0, sizeof(msg));
868 1021 : if (p2p_parse_p2p_ie(p2p_ie, &msg))
869 0 : return NULL;
870 :
871 1021 : if (msg.p2p_device_addr)
872 969 : return msg.p2p_device_addr;
873 52 : if (msg.device_id)
874 42 : return msg.device_id;
875 :
876 10 : return NULL;
877 : }
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