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
p2p_parse_attribute(u8 id,const u8 * data,u16 len,struct p2p_message * msg)18 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 switch (id) {
26 case P2P_ATTR_CAPABILITY:
27 if (len < 2) {
28 wpa_printf(MSG_DEBUG, "P2P: Too short Capability "
29 "attribute (length %d)", len);
30 return -1;
31 }
32 msg->capability = data;
33 wpa_printf(MSG_DEBUG, "P2P: * Device Capability %02x "
34 "Group Capability %02x",
35 data[0], data[1]);
36 break;
37 case P2P_ATTR_DEVICE_ID:
38 if (len < ETH_ALEN) {
39 wpa_printf(MSG_DEBUG, "P2P: Too short Device ID "
40 "attribute (length %d)", len);
41 return -1;
42 }
43 msg->device_id = data;
44 wpa_printf(MSG_DEBUG, "P2P: * Device ID " MACSTR,
45 MAC2STR(msg->device_id));
46 break;
47 case P2P_ATTR_GROUP_OWNER_INTENT:
48 if (len < 1) {
49 wpa_printf(MSG_DEBUG, "P2P: Too short GO Intent "
50 "attribute (length %d)", len);
51 return -1;
52 }
53 msg->go_intent = data;
54 wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u "
55 "Tie breaker %u", data[0] >> 1, data[0] & 0x01);
56 break;
57 case P2P_ATTR_STATUS:
58 if (len < 1) {
59 wpa_printf(MSG_DEBUG, "P2P: Too short Status "
60 "attribute (length %d)", len);
61 return -1;
62 }
63 msg->status = data;
64 wpa_printf(MSG_DEBUG, "P2P: * Status: %d", data[0]);
65 break;
66 case P2P_ATTR_LISTEN_CHANNEL:
67 if (len == 0) {
68 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Ignore "
69 "null channel");
70 break;
71 }
72 if (len < 5) {
73 wpa_printf(MSG_DEBUG, "P2P: Too short Listen Channel "
74 "attribute (length %d)", len);
75 return -1;
76 }
77 msg->listen_channel = data;
78 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: "
79 "Country %c%c(0x%02x) Regulatory "
80 "Class %d Channel Number %d", data[0], data[1],
81 data[2], data[3], data[4]);
82 break;
83 case P2P_ATTR_OPERATING_CHANNEL:
84 if (len == 0) {
85 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
86 "Ignore null channel");
87 break;
88 }
89 if (len < 5) {
90 wpa_printf(MSG_DEBUG, "P2P: Too short Operating "
91 "Channel attribute (length %d)", len);
92 return -1;
93 }
94 msg->operating_channel = data;
95 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
96 "Country %c%c(0x%02x) Regulatory "
97 "Class %d Channel Number %d", data[0], data[1],
98 data[2], data[3], data[4]);
99 break;
100 case P2P_ATTR_CHANNEL_LIST:
101 if (len < 3) {
102 wpa_printf(MSG_DEBUG, "P2P: Too short Channel List "
103 "attribute (length %d)", len);
104 return -1;
105 }
106 msg->channel_list = data;
107 msg->channel_list_len = len;
108 wpa_printf(MSG_DEBUG, "P2P: * Channel List: Country String "
109 "'%c%c(0x%02x)'", data[0], data[1], data[2]);
110 wpa_hexdump(MSG_MSGDUMP, "P2P: Channel List",
111 msg->channel_list, msg->channel_list_len);
112 break;
113 case P2P_ATTR_GROUP_INFO:
114 msg->group_info = data;
115 msg->group_info_len = len;
116 wpa_printf(MSG_DEBUG, "P2P: * Group Info");
117 break;
118 case P2P_ATTR_DEVICE_INFO:
119 if (len < ETH_ALEN + 2 + 8 + 1) {
120 wpa_printf(MSG_DEBUG, "P2P: Too short Device Info "
121 "attribute (length %d)", len);
122 return -1;
123 }
124 msg->p2p_device_info = data;
125 msg->p2p_device_info_len = len;
126 pos = data;
127 msg->p2p_device_addr = pos;
128 pos += ETH_ALEN;
129 msg->config_methods = WPA_GET_BE16(pos);
130 pos += 2;
131 msg->pri_dev_type = pos;
132 pos += 8;
133 msg->num_sec_dev_types = *pos++;
134 if (msg->num_sec_dev_types * 8 > data + len - pos) {
135 wpa_printf(MSG_DEBUG, "P2P: Device Info underflow");
136 return -1;
137 }
138 pos += msg->num_sec_dev_types * 8;
139 if (data + len - pos < 4) {
140 wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
141 "length %d", (int) (data + len - pos));
142 return -1;
143 }
144 if (WPA_GET_BE16(pos) != ATTR_DEV_NAME) {
145 wpa_hexdump(MSG_DEBUG, "P2P: Unexpected Device Name "
146 "header", pos, 4);
147 return -1;
148 }
149 pos += 2;
150 nlen = WPA_GET_BE16(pos);
151 pos += 2;
152 if (data + len - pos < (int) nlen || nlen > 32) {
153 wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
154 "length %d (buf len %d)", (int) nlen,
155 (int) (data + len - pos));
156 return -1;
157 }
158 os_memcpy(msg->device_name, pos, nlen);
159 msg->device_name[nlen] = '\0';
160 for (i = 0; i < nlen; i++) {
161 if (msg->device_name[i] == '\0')
162 break;
163 if (msg->device_name[i] > 0 &&
164 msg->device_name[i] < 32)
165 msg->device_name[i] = '_';
166 }
167 wpa_printf(MSG_DEBUG, "P2P: * Device Info: addr " MACSTR
168 " primary device type %s device name '%s' "
169 "config methods 0x%x",
170 MAC2STR(msg->p2p_device_addr),
171 wps_dev_type_bin2str(msg->pri_dev_type, devtype,
172 sizeof(devtype)),
173 msg->device_name, msg->config_methods);
174 break;
175 case P2P_ATTR_CONFIGURATION_TIMEOUT:
176 if (len < 2) {
177 wpa_printf(MSG_DEBUG, "P2P: Too short Configuration "
178 "Timeout attribute (length %d)", len);
179 return -1;
180 }
181 msg->config_timeout = data;
182 wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout");
183 break;
184 case P2P_ATTR_INTENDED_INTERFACE_ADDR:
185 if (len < ETH_ALEN) {
186 wpa_printf(MSG_DEBUG, "P2P: Too short Intended P2P "
187 "Interface Address attribute (length %d)",
188 len);
189 return -1;
190 }
191 msg->intended_addr = data;
192 wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address: "
193 MACSTR, MAC2STR(msg->intended_addr));
194 break;
195 case P2P_ATTR_GROUP_BSSID:
196 if (len < ETH_ALEN) {
197 wpa_printf(MSG_DEBUG, "P2P: Too short P2P Group BSSID "
198 "attribute (length %d)", len);
199 return -1;
200 }
201 msg->group_bssid = data;
202 wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID: " MACSTR,
203 MAC2STR(msg->group_bssid));
204 break;
205 case P2P_ATTR_GROUP_ID:
206 if (len < ETH_ALEN || len > ETH_ALEN + 32) {
207 wpa_printf(MSG_DEBUG, "P2P: Invalid P2P Group ID "
208 "attribute length %d", len);
209 return -1;
210 }
211 msg->group_id = data;
212 msg->group_id_len = len;
213 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID: Device Address "
214 MACSTR, MAC2STR(msg->group_id));
215 wpa_hexdump_ascii(MSG_DEBUG, "P2P: * P2P Group ID: SSID",
216 msg->group_id + ETH_ALEN,
217 msg->group_id_len - ETH_ALEN);
218 break;
219 case P2P_ATTR_INVITATION_FLAGS:
220 if (len < 1) {
221 wpa_printf(MSG_DEBUG, "P2P: Too short Invitation "
222 "Flag attribute (length %d)", len);
223 return -1;
224 }
225 msg->invitation_flags = data;
226 wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x",
227 data[0]);
228 break;
229 case P2P_ATTR_MANAGEABILITY:
230 if (len < 1) {
231 wpa_printf(MSG_DEBUG, "P2P: Too short Manageability "
232 "attribute (length %d)", len);
233 return -1;
234 }
235 msg->manageability = data;
236 wpa_printf(MSG_DEBUG, "P2P: * Manageability: bitmap 0x%x",
237 data[0]);
238 break;
239 case P2P_ATTR_NOTICE_OF_ABSENCE:
240 if (len < 2) {
241 wpa_printf(MSG_DEBUG, "P2P: Too short Notice of "
242 "Absence attribute (length %d)", len);
243 return -1;
244 }
245 msg->noa = data;
246 msg->noa_len = len;
247 wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
248 break;
249 case P2P_ATTR_EXT_LISTEN_TIMING:
250 if (len < 4) {
251 wpa_printf(MSG_DEBUG, "P2P: Too short Extended Listen "
252 "Timing attribute (length %d)", len);
253 return -1;
254 }
255 msg->ext_listen_timing = data;
256 wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing "
257 "(period %u msec interval %u msec)",
258 WPA_GET_LE16(msg->ext_listen_timing),
259 WPA_GET_LE16(msg->ext_listen_timing + 2));
260 break;
261 case P2P_ATTR_MINOR_REASON_CODE:
262 if (len < 1) {
263 wpa_printf(MSG_DEBUG, "P2P: Too short Minor Reason "
264 "Code attribute (length %d)", len);
265 return -1;
266 }
267 msg->minor_reason_code = data;
268 wpa_printf(MSG_DEBUG, "P2P: * Minor Reason Code: %u",
269 *msg->minor_reason_code);
270 break;
271 default:
272 wpa_printf(MSG_DEBUG, "P2P: Skipped unknown attribute %d "
273 "(length %d)", id, len);
274 break;
275 }
276
277 return 0;
278 }
279
280
281 /**
282 * p2p_parse_p2p_ie - Parse P2P IE
283 * @buf: Concatenated P2P IE(s) payload
284 * @msg: Buffer for returning parsed attributes
285 * Returns: 0 on success, -1 on failure
286 *
287 * Note: Caller is responsible for clearing the msg data structure before
288 * calling this function.
289 */
p2p_parse_p2p_ie(const struct wpabuf * buf,struct p2p_message * msg)290 int p2p_parse_p2p_ie(const struct wpabuf *buf, struct p2p_message *msg)
291 {
292 const u8 *pos = wpabuf_head_u8(buf);
293 const u8 *end = pos + wpabuf_len(buf);
294
295 wpa_printf(MSG_DEBUG, "P2P: Parsing P2P IE");
296
297 while (pos < end) {
298 u16 attr_len;
299 if (pos + 2 >= end) {
300 wpa_printf(MSG_DEBUG, "P2P: Invalid P2P attribute");
301 return -1;
302 }
303 attr_len = WPA_GET_LE16(pos + 1);
304 wpa_printf(MSG_DEBUG, "P2P: Attribute %d length %u",
305 pos[0], attr_len);
306 if (pos + 3 + attr_len > end) {
307 wpa_printf(MSG_DEBUG, "P2P: Attribute underflow "
308 "(len=%u left=%d)",
309 attr_len, (int) (end - pos - 3));
310 wpa_hexdump(MSG_MSGDUMP, "P2P: Data", pos, end - pos);
311 return -1;
312 }
313 if (p2p_parse_attribute(pos[0], pos + 3, attr_len, msg))
314 return -1;
315 pos += 3 + attr_len;
316 }
317
318 return 0;
319 }
320
321
p2p_parse_wps_ie(const struct wpabuf * buf,struct p2p_message * msg)322 static int p2p_parse_wps_ie(const struct wpabuf *buf, struct p2p_message *msg)
323 {
324 struct wps_parse_attr attr;
325 int i;
326
327 wpa_printf(MSG_DEBUG, "P2P: Parsing WPS IE");
328 if (wps_parse_msg(buf, &attr))
329 return -1;
330 if (attr.dev_name && attr.dev_name_len < sizeof(msg->device_name) &&
331 !msg->device_name[0])
332 os_memcpy(msg->device_name, attr.dev_name, attr.dev_name_len);
333 if (attr.config_methods) {
334 msg->wps_config_methods =
335 WPA_GET_BE16(attr.config_methods);
336 wpa_printf(MSG_DEBUG, "P2P: Config Methods (WPS): 0x%x",
337 msg->wps_config_methods);
338 }
339 if (attr.dev_password_id) {
340 msg->dev_password_id = WPA_GET_BE16(attr.dev_password_id);
341 wpa_printf(MSG_DEBUG, "P2P: Device Password ID: %d",
342 msg->dev_password_id);
343 }
344 if (attr.primary_dev_type) {
345 char devtype[WPS_DEV_TYPE_BUFSIZE];
346 msg->wps_pri_dev_type = attr.primary_dev_type;
347 wpa_printf(MSG_DEBUG, "P2P: Primary Device Type (WPS): %s",
348 wps_dev_type_bin2str(msg->wps_pri_dev_type, devtype,
349 sizeof(devtype)));
350 }
351 if (attr.sec_dev_type_list) {
352 msg->wps_sec_dev_type_list = attr.sec_dev_type_list;
353 msg->wps_sec_dev_type_list_len = attr.sec_dev_type_list_len;
354 }
355
356 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
357 msg->wps_vendor_ext[i] = attr.vendor_ext[i];
358 msg->wps_vendor_ext_len[i] = attr.vendor_ext_len[i];
359 }
360
361 msg->manufacturer = attr.manufacturer;
362 msg->manufacturer_len = attr.manufacturer_len;
363 msg->model_name = attr.model_name;
364 msg->model_name_len = attr.model_name_len;
365 msg->model_number = attr.model_number;
366 msg->model_number_len = attr.model_number_len;
367 msg->serial_number = attr.serial_number;
368 msg->serial_number_len = attr.serial_number_len;
369
370 return 0;
371 }
372
373
374 /**
375 * p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE)
376 * @data: IEs from the message
377 * @len: Length of data buffer in octets
378 * @msg: Buffer for returning parsed attributes
379 * Returns: 0 on success, -1 on failure
380 *
381 * Note: Caller is responsible for clearing the msg data structure before
382 * calling this function.
383 *
384 * Note: Caller must free temporary memory allocations by calling
385 * p2p_parse_free() when the parsed data is not needed anymore.
386 */
p2p_parse_ies(const u8 * data,size_t len,struct p2p_message * msg)387 int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg)
388 {
389 struct ieee802_11_elems elems;
390
391 ieee802_11_parse_elems(data, len, &elems, 0);
392 if (elems.ds_params && elems.ds_params_len >= 1)
393 msg->ds_params = elems.ds_params;
394 if (elems.ssid)
395 msg->ssid = elems.ssid - 2;
396
397 msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len,
398 WPS_DEV_OUI_WFA);
399 if (msg->wps_attributes &&
400 p2p_parse_wps_ie(msg->wps_attributes, msg)) {
401 p2p_parse_free(msg);
402 return -1;
403 }
404
405 msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len,
406 P2P_IE_VENDOR_TYPE);
407 if (msg->p2p_attributes &&
408 p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
409 wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
410 if (msg->p2p_attributes)
411 wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
412 msg->p2p_attributes);
413 p2p_parse_free(msg);
414 return -1;
415 }
416
417 #ifdef CONFIG_WIFI_DISPLAY
418 if (elems.wfd) {
419 msg->wfd_subelems = ieee802_11_vendor_ie_concat(
420 data, len, WFD_IE_VENDOR_TYPE);
421 }
422 #endif /* CONFIG_WIFI_DISPLAY */
423
424 return 0;
425 }
426
427
428 /**
429 * p2p_parse - Parse a P2P Action frame contents
430 * @data: Action frame payload after Category and Code fields
431 * @len: Length of data buffer in octets
432 * @msg: Buffer for returning parsed attributes
433 * Returns: 0 on success, -1 on failure
434 *
435 * Note: Caller must free temporary memory allocations by calling
436 * p2p_parse_free() when the parsed data is not needed anymore.
437 */
p2p_parse(const u8 * data,size_t len,struct p2p_message * msg)438 int p2p_parse(const u8 *data, size_t len, struct p2p_message *msg)
439 {
440 os_memset(msg, 0, sizeof(*msg));
441 wpa_printf(MSG_DEBUG, "P2P: Parsing the received message");
442 if (len < 1) {
443 wpa_printf(MSG_DEBUG, "P2P: No Dialog Token in the message");
444 return -1;
445 }
446 msg->dialog_token = data[0];
447 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", msg->dialog_token);
448
449 return p2p_parse_ies(data + 1, len - 1, msg);
450 }
451
452
453 /**
454 * p2p_parse_free - Free temporary data from P2P parsing
455 * @msg: Parsed attributes
456 */
p2p_parse_free(struct p2p_message * msg)457 void p2p_parse_free(struct p2p_message *msg)
458 {
459 wpabuf_free(msg->p2p_attributes);
460 msg->p2p_attributes = NULL;
461 wpabuf_free(msg->wps_attributes);
462 msg->wps_attributes = NULL;
463 #ifdef CONFIG_WIFI_DISPLAY
464 wpabuf_free(msg->wfd_subelems);
465 msg->wfd_subelems = NULL;
466 #endif /* CONFIG_WIFI_DISPLAY */
467 }
468
469
p2p_group_info_parse(const u8 * gi,size_t gi_len,struct p2p_group_info * info)470 int p2p_group_info_parse(const u8 *gi, size_t gi_len,
471 struct p2p_group_info *info)
472 {
473 const u8 *g, *gend;
474
475 os_memset(info, 0, sizeof(*info));
476 if (gi == NULL)
477 return 0;
478
479 g = gi;
480 gend = gi + gi_len;
481 while (g < gend) {
482 struct p2p_client_info *cli;
483 const u8 *t, *cend;
484 int count;
485
486 cli = &info->client[info->num_clients];
487 cend = g + 1 + g[0];
488 if (cend > gend)
489 return -1; /* invalid data */
490 /* g at start of P2P Client Info Descriptor */
491 /* t at Device Capability Bitmap */
492 t = g + 1 + 2 * ETH_ALEN;
493 if (t > cend)
494 return -1; /* invalid data */
495 cli->p2p_device_addr = g + 1;
496 cli->p2p_interface_addr = g + 1 + ETH_ALEN;
497 cli->dev_capab = t[0];
498
499 if (t + 1 + 2 + 8 + 1 > cend)
500 return -1; /* invalid data */
501
502 cli->config_methods = WPA_GET_BE16(&t[1]);
503 cli->pri_dev_type = &t[3];
504
505 t += 1 + 2 + 8;
506 /* t at Number of Secondary Device Types */
507 cli->num_sec_dev_types = *t++;
508 if (t + 8 * cli->num_sec_dev_types > cend)
509 return -1; /* invalid data */
510 cli->sec_dev_types = t;
511 t += 8 * cli->num_sec_dev_types;
512
513 /* t at Device Name in WPS TLV format */
514 if (t + 2 + 2 > cend)
515 return -1; /* invalid data */
516 if (WPA_GET_BE16(t) != ATTR_DEV_NAME)
517 return -1; /* invalid Device Name TLV */
518 t += 2;
519 count = WPA_GET_BE16(t);
520 t += 2;
521 if (count > cend - t)
522 return -1; /* invalid Device Name TLV */
523 if (count >= 32)
524 count = 32;
525 cli->dev_name = (const char *) t;
526 cli->dev_name_len = count;
527
528 g = cend;
529
530 info->num_clients++;
531 if (info->num_clients == P2P_MAX_GROUP_ENTRIES)
532 return -1;
533 }
534
535 return 0;
536 }
537
538
p2p_group_info_text(const u8 * gi,size_t gi_len,char * buf,char * end)539 static int p2p_group_info_text(const u8 *gi, size_t gi_len, char *buf,
540 char *end)
541 {
542 char *pos = buf;
543 int ret;
544 struct p2p_group_info info;
545 unsigned int i;
546
547 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
548 return 0;
549
550 for (i = 0; i < info.num_clients; i++) {
551 struct p2p_client_info *cli;
552 char name[33];
553 char devtype[WPS_DEV_TYPE_BUFSIZE];
554 u8 s;
555 int count;
556
557 cli = &info.client[i];
558 ret = os_snprintf(pos, end - pos, "p2p_group_client: "
559 "dev=" MACSTR " iface=" MACSTR,
560 MAC2STR(cli->p2p_device_addr),
561 MAC2STR(cli->p2p_interface_addr));
562 if (ret < 0 || ret >= end - pos)
563 return pos - buf;
564 pos += ret;
565
566 ret = os_snprintf(pos, end - pos,
567 " dev_capab=0x%x config_methods=0x%x "
568 "dev_type=%s",
569 cli->dev_capab, cli->config_methods,
570 wps_dev_type_bin2str(cli->pri_dev_type,
571 devtype,
572 sizeof(devtype)));
573 if (ret < 0 || ret >= end - pos)
574 return pos - buf;
575 pos += ret;
576
577 for (s = 0; s < cli->num_sec_dev_types; s++) {
578 ret = os_snprintf(pos, end - pos, " dev_type=%s",
579 wps_dev_type_bin2str(
580 &cli->sec_dev_types[s * 8],
581 devtype, sizeof(devtype)));
582 if (ret < 0 || ret >= end - pos)
583 return pos - buf;
584 pos += ret;
585 }
586
587 os_memcpy(name, cli->dev_name, cli->dev_name_len);
588 name[cli->dev_name_len] = '\0';
589 count = (int) cli->dev_name_len - 1;
590 while (count >= 0) {
591 if (name[count] > 0 && name[count] < 32)
592 name[count] = '_';
593 count--;
594 }
595
596 ret = os_snprintf(pos, end - pos, " dev_name='%s'\n", name);
597 if (ret < 0 || ret >= end - pos)
598 return pos - buf;
599 pos += ret;
600 }
601
602 return pos - buf;
603 }
604
605
606 /**
607 * p2p_attr_text - Build text format description of P2P IE attributes
608 * @data: P2P IE contents
609 * @buf: Buffer for returning text
610 * @end: Pointer to the end of the buf area
611 * Returns: Number of octets written to the buffer or -1 on faikure
612 *
613 * This function can be used to parse P2P IE contents into text format
614 * field=value lines.
615 */
p2p_attr_text(struct wpabuf * data,char * buf,char * end)616 int p2p_attr_text(struct wpabuf *data, char *buf, char *end)
617 {
618 struct p2p_message msg;
619 char *pos = buf;
620 int ret;
621
622 os_memset(&msg, 0, sizeof(msg));
623 if (p2p_parse_p2p_ie(data, &msg))
624 return -1;
625
626 if (msg.capability) {
627 ret = os_snprintf(pos, end - pos,
628 "p2p_dev_capab=0x%x\n"
629 "p2p_group_capab=0x%x\n",
630 msg.capability[0], msg.capability[1]);
631 if (ret < 0 || ret >= end - pos)
632 return pos - buf;
633 pos += ret;
634 }
635
636 if (msg.pri_dev_type) {
637 char devtype[WPS_DEV_TYPE_BUFSIZE];
638 ret = os_snprintf(pos, end - pos,
639 "p2p_primary_device_type=%s\n",
640 wps_dev_type_bin2str(msg.pri_dev_type,
641 devtype,
642 sizeof(devtype)));
643 if (ret < 0 || ret >= end - pos)
644 return pos - buf;
645 pos += ret;
646 }
647
648 ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n",
649 msg.device_name);
650 if (ret < 0 || ret >= end - pos)
651 return pos - buf;
652 pos += ret;
653
654 if (msg.p2p_device_addr) {
655 ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR
656 "\n",
657 MAC2STR(msg.p2p_device_addr));
658 if (ret < 0 || ret >= end - pos)
659 return pos - buf;
660 pos += ret;
661 }
662
663 ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n",
664 msg.config_methods);
665 if (ret < 0 || ret >= end - pos)
666 return pos - buf;
667 pos += ret;
668
669 ret = p2p_group_info_text(msg.group_info, msg.group_info_len,
670 pos, end);
671 if (ret < 0)
672 return pos - buf;
673 pos += ret;
674
675 return pos - buf;
676 }
677
678
p2p_get_cross_connect_disallowed(const struct wpabuf * p2p_ie)679 int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie)
680 {
681 struct p2p_message msg;
682
683 os_memset(&msg, 0, sizeof(msg));
684 if (p2p_parse_p2p_ie(p2p_ie, &msg))
685 return 0;
686
687 if (!msg.manageability)
688 return 0;
689
690 return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTION_PERMITTED);
691 }
692
693
p2p_get_group_capab(const struct wpabuf * p2p_ie)694 u8 p2p_get_group_capab(const struct wpabuf *p2p_ie)
695 {
696 struct p2p_message msg;
697
698 os_memset(&msg, 0, sizeof(msg));
699 if (p2p_parse_p2p_ie(p2p_ie, &msg))
700 return 0;
701
702 if (!msg.capability)
703 return 0;
704
705 return msg.capability[1];
706 }
707
708
p2p_get_go_dev_addr(const struct wpabuf * p2p_ie)709 const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie)
710 {
711 struct p2p_message msg;
712
713 os_memset(&msg, 0, sizeof(msg));
714 if (p2p_parse_p2p_ie(p2p_ie, &msg))
715 return NULL;
716
717 if (msg.p2p_device_addr)
718 return msg.p2p_device_addr;
719 if (msg.device_id)
720 return msg.device_id;
721
722 return NULL;
723 }
724