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P2PS: Fix Probe Response frame building in error cases
[thirdparty/hostap.git] / src / p2p / p2p_build.c
CommitLineData
b22128ef
JM		 1/*
2 * P2P - IE builder
3 * Copyright (c) 2009-2010, Atheros Communications
4 *
e22d4d95
JM		 5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
b22128ef
JM		 7 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "common/ieee802_11_defs.h"
13#include "wps/wps_i.h"
14#include "p2p_i.h"
15
16
17void p2p_buf_add_action_hdr(struct wpabuf *buf, u8 subtype, u8 dialog_token)
18{
19 wpabuf_put_u8(buf, WLAN_ACTION_VENDOR_SPECIFIC);
8bc4372f 20 wpabuf_put_be32(buf, P2P_IE_VENDOR_TYPE);
b22128ef
JM		 21
22 wpabuf_put_u8(buf, subtype); /* OUI Subtype */
23 wpabuf_put_u8(buf, dialog_token);
24 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token);
25}
26
27
28void p2p_buf_add_public_action_hdr(struct wpabuf *buf, u8 subtype,
29 u8 dialog_token)
30{
31 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
32 wpabuf_put_u8(buf, WLAN_PA_VENDOR_SPECIFIC);
8bc4372f 33 wpabuf_put_be32(buf, P2P_IE_VENDOR_TYPE);
b22128ef
JM		 34
35 wpabuf_put_u8(buf, subtype); /* OUI Subtype */
36 wpabuf_put_u8(buf, dialog_token);
37 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token);
38}
39
40
41u8 * p2p_buf_add_ie_hdr(struct wpabuf *buf)
42{
43 u8 *len;
44
45 /* P2P IE header */
46 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
47 len = wpabuf_put(buf, 1); /* IE length to be filled */
8bc4372f 48 wpabuf_put_be32(buf, P2P_IE_VENDOR_TYPE);
b22128ef
JM		 49 wpa_printf(MSG_DEBUG, "P2P: * P2P IE header");
50 return len;
51}
52
53
54void p2p_buf_update_ie_hdr(struct wpabuf *buf, u8 *len)
55{
56 /* Update P2P IE Length */
57 *len = (u8 *) wpabuf_put(buf, 0) - len - 1;
58}
59
60
61void p2p_buf_add_capability(struct wpabuf *buf, u8 dev_capab, u8 group_capab)
62{
63 /* P2P Capability */
64 wpabuf_put_u8(buf, P2P_ATTR_CAPABILITY);
65 wpabuf_put_le16(buf, 2);
66 wpabuf_put_u8(buf, dev_capab); /* Device Capabilities */
67 wpabuf_put_u8(buf, group_capab); /* Group Capabilities */
68 wpa_printf(MSG_DEBUG, "P2P: * Capability dev=%02x group=%02x",
69 dev_capab, group_capab);
70}
71
72
73void p2p_buf_add_go_intent(struct wpabuf *buf, u8 go_intent)
74{
75 /* Group Owner Intent */
76 wpabuf_put_u8(buf, P2P_ATTR_GROUP_OWNER_INTENT);
77 wpabuf_put_le16(buf, 1);
78 wpabuf_put_u8(buf, go_intent);
79 wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u Tie breaker %u",
80 go_intent >> 1, go_intent & 0x01);
81}
82
83
84void p2p_buf_add_listen_channel(struct wpabuf *buf, const char *country,
85 u8 reg_class, u8 channel)
86{
87 /* Listen Channel */
88 wpabuf_put_u8(buf, P2P_ATTR_LISTEN_CHANNEL);
89 wpabuf_put_le16(buf, 5);
90 wpabuf_put_data(buf, country, 3);
91 wpabuf_put_u8(buf, reg_class); /* Regulatory Class */
92 wpabuf_put_u8(buf, channel); /* Channel Number */
93 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Regulatory Class %u "
94 "Channel %u", reg_class, channel);
95}
96
97
98void p2p_buf_add_operating_channel(struct wpabuf *buf, const char *country,
99 u8 reg_class, u8 channel)
100{
101 /* Operating Channel */
102 wpabuf_put_u8(buf, P2P_ATTR_OPERATING_CHANNEL);
103 wpabuf_put_le16(buf, 5);
104 wpabuf_put_data(buf, country, 3);
105 wpabuf_put_u8(buf, reg_class); /* Regulatory Class */
106 wpabuf_put_u8(buf, channel); /* Channel Number */
107 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: Regulatory Class %u "
108 "Channel %u", reg_class, channel);
109}
110
111
112void p2p_buf_add_channel_list(struct wpabuf *buf, const char *country,
113 struct p2p_channels *chan)
114{
115 u8 *len;
116 size_t i;
117
118 /* Channel List */
119 wpabuf_put_u8(buf, P2P_ATTR_CHANNEL_LIST);
120 len = wpabuf_put(buf, 2); /* IE length to be filled */
121 wpabuf_put_data(buf, country, 3); /* Country String */
122
123 for (i = 0; i < chan->reg_classes; i++) {
124 struct p2p_reg_class *c = &chan->reg_class[i];
125 wpabuf_put_u8(buf, c->reg_class);
126 wpabuf_put_u8(buf, c->channels);
127 wpabuf_put_data(buf, c->channel, c->channels);
128 }
129
130 /* Update attribute length */
131 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2);
7759fba1
JM		 132 wpa_hexdump(MSG_DEBUG, "P2P: * Channel List",
133 len + 2, (u8 *) wpabuf_put(buf, 0) - len - 2);
b22128ef
JM		 134}
135
136
137void p2p_buf_add_status(struct wpabuf *buf, u8 status)
138{
139 /* Status */
140 wpabuf_put_u8(buf, P2P_ATTR_STATUS);
141 wpabuf_put_le16(buf, 1);
142 wpabuf_put_u8(buf, status);
143 wpa_printf(MSG_DEBUG, "P2P: * Status: %d", status);
144}
145
146
147void p2p_buf_add_device_info(struct wpabuf *buf, struct p2p_data *p2p,
148 struct p2p_device *peer)
149{
150 u8 *len;
151 u16 methods;
152 size_t nlen, i;
153
154 /* P2P Device Info */
155 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_INFO);
156 len = wpabuf_put(buf, 2); /* IE length to be filled */
157
158 /* P2P Device address */
159 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
160
161 /* Config Methods */
162 methods = 0;
252d7db2 163 if (peer && peer->wps_method != WPS_NOT_READY) {
b22128ef
JM		 164 if (peer->wps_method == WPS_PBC)
165 methods |= WPS_CONFIG_PUSHBUTTON;
b22128ef 166 else if (peer->wps_method == WPS_PIN_DISPLAY ||
4f88fc04 167 peer->wps_method == WPS_PIN_KEYPAD) {
b22128ef 168 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
4f88fc04
BG		 169 methods |= WPS_CONFIG_P2PS;
170 }
25e5d5bc
JM		 171 } else if (p2p->cfg->config_methods) {
172 methods |= p2p->cfg->config_methods &
173 (WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_DISPLAY |
4f88fc04 174 WPS_CONFIG_KEYPAD | WPS_CONFIG_P2PS);
b22128ef
JM		 175 } else {
176 methods |= WPS_CONFIG_PUSHBUTTON;
177 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
4f88fc04 178 methods |= WPS_CONFIG_P2PS;
b22128ef
JM		 179 }
180 wpabuf_put_be16(buf, methods);
181
182 /* Primary Device Type */
183 wpabuf_put_data(buf, p2p->cfg->pri_dev_type,
184 sizeof(p2p->cfg->pri_dev_type));
185
186 /* Number of Secondary Device Types */
187 wpabuf_put_u8(buf, p2p->cfg->num_sec_dev_types);
188
189 /* Secondary Device Type List */
190 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
191 wpabuf_put_data(buf, p2p->cfg->sec_dev_type[i],
192 WPS_DEV_TYPE_LEN);
193
194 /* Device Name */
195 nlen = p2p->cfg->dev_name ? os_strlen(p2p->cfg->dev_name) : 0;
196 wpabuf_put_be16(buf, ATTR_DEV_NAME);
197 wpabuf_put_be16(buf, nlen);
198 wpabuf_put_data(buf, p2p->cfg->dev_name, nlen);
199
200 /* Update attribute length */
201 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2);
202 wpa_printf(MSG_DEBUG, "P2P: * Device Info");
203}
204
205
206void p2p_buf_add_device_id(struct wpabuf *buf, const u8 *dev_addr)
207{
208 /* P2P Device ID */
209 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_ID);
210 wpabuf_put_le16(buf, ETH_ALEN);
211 wpabuf_put_data(buf, dev_addr, ETH_ALEN);
212 wpa_printf(MSG_DEBUG, "P2P: * Device ID: " MACSTR, MAC2STR(dev_addr));
213}
214
215
216void p2p_buf_add_config_timeout(struct wpabuf *buf, u8 go_timeout,
217 u8 client_timeout)
218{
219 /* Configuration Timeout */
220 wpabuf_put_u8(buf, P2P_ATTR_CONFIGURATION_TIMEOUT);
221 wpabuf_put_le16(buf, 2);
222 wpabuf_put_u8(buf, go_timeout);
223 wpabuf_put_u8(buf, client_timeout);
224 wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout: GO %d (*10ms) "
225 "client %d (*10ms)", go_timeout, client_timeout);
226}
227
228
229void p2p_buf_add_intended_addr(struct wpabuf *buf, const u8 *interface_addr)
230{
231 /* Intended P2P Interface Address */
232 wpabuf_put_u8(buf, P2P_ATTR_INTENDED_INTERFACE_ADDR);
233 wpabuf_put_le16(buf, ETH_ALEN);
234 wpabuf_put_data(buf, interface_addr, ETH_ALEN);
235 wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address " MACSTR,
236 MAC2STR(interface_addr));
237}
238
239
240void p2p_buf_add_group_bssid(struct wpabuf *buf, const u8 *bssid)
241{
242 /* P2P Group BSSID */
243 wpabuf_put_u8(buf, P2P_ATTR_GROUP_BSSID);
244 wpabuf_put_le16(buf, ETH_ALEN);
245 wpabuf_put_data(buf, bssid, ETH_ALEN);
246 wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID " MACSTR,
247 MAC2STR(bssid));
248}
249
250
251void p2p_buf_add_group_id(struct wpabuf *buf, const u8 *dev_addr,
252 const u8 *ssid, size_t ssid_len)
253{
254 /* P2P Group ID */
255 wpabuf_put_u8(buf, P2P_ATTR_GROUP_ID);
256 wpabuf_put_le16(buf, ETH_ALEN + ssid_len);
257 wpabuf_put_data(buf, dev_addr, ETH_ALEN);
258 wpabuf_put_data(buf, ssid, ssid_len);
259 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR,
260 MAC2STR(dev_addr));
83eefb40 261 wpa_hexdump_ascii(MSG_DEBUG, "P2P: P2P Group ID SSID", ssid, ssid_len);
b22128ef
JM		 262}
263
264
265void p2p_buf_add_invitation_flags(struct wpabuf *buf, u8 flags)
266{
267 /* Invitation Flags */
268 wpabuf_put_u8(buf, P2P_ATTR_INVITATION_FLAGS);
269 wpabuf_put_le16(buf, 1);
270 wpabuf_put_u8(buf, flags);
271 wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x", flags);
272}
273
274
275static void p2p_buf_add_noa_desc(struct wpabuf *buf, struct p2p_noa_desc *desc)
276{
277 if (desc == NULL)
278 return;
279
280 wpabuf_put_u8(buf, desc->count_type);
281 wpabuf_put_le32(buf, desc->duration);
282 wpabuf_put_le32(buf, desc->interval);
283 wpabuf_put_le32(buf, desc->start_time);
284}
285
286
287void p2p_buf_add_noa(struct wpabuf *buf, u8 noa_index, u8 opp_ps, u8 ctwindow,
288 struct p2p_noa_desc *desc1, struct p2p_noa_desc *desc2)
289{
290 /* Notice of Absence */
291 wpabuf_put_u8(buf, P2P_ATTR_NOTICE_OF_ABSENCE);
292 wpabuf_put_le16(buf, 2 + (desc1 ? 13 : 0) + (desc2 ? 13 : 0));
293 wpabuf_put_u8(buf, noa_index);
294 wpabuf_put_u8(buf, (opp_ps ? 0x80 : 0) | (ctwindow & 0x7f));
295 p2p_buf_add_noa_desc(buf, desc1);
296 p2p_buf_add_noa_desc(buf, desc2);
297 wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
298}
299
300
301void p2p_buf_add_ext_listen_timing(struct wpabuf *buf, u16 period,
302 u16 interval)
303{
304 /* Extended Listen Timing */
305 wpabuf_put_u8(buf, P2P_ATTR_EXT_LISTEN_TIMING);
306 wpabuf_put_le16(buf, 4);
307 wpabuf_put_le16(buf, period);
308 wpabuf_put_le16(buf, interval);
309 wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing (period %u msec "
310 "interval %u msec)", period, interval);
311}
312
313
314void p2p_buf_add_p2p_interface(struct wpabuf *buf, struct p2p_data *p2p)
315{
316 /* P2P Interface */
317 wpabuf_put_u8(buf, P2P_ATTR_INTERFACE);
318 wpabuf_put_le16(buf, ETH_ALEN + 1 + ETH_ALEN);
319 /* P2P Device address */
320 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
321 /*
322 * FIX: Fetch interface address list from driver. Do not include
323 * the P2P Device address if it is never used as interface address.
324 */
325 /* P2P Interface Address Count */
326 wpabuf_put_u8(buf, 1);
327 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
328}
329
330
9e323a24
JM		 331void p2p_buf_add_oob_go_neg_channel(struct wpabuf *buf, const char *country,
332 u8 oper_class, u8 channel,
333 enum p2p_role_indication role)
334{
335 /* OOB Group Owner Negotiation Channel */
336 wpabuf_put_u8(buf, P2P_ATTR_OOB_GO_NEG_CHANNEL);
337 wpabuf_put_le16(buf, 6);
338 wpabuf_put_data(buf, country, 3);
339 wpabuf_put_u8(buf, oper_class); /* Operating Class */
340 wpabuf_put_u8(buf, channel); /* Channel Number */
341 wpabuf_put_u8(buf, (u8) role); /* Role indication */
342 wpa_printf(MSG_DEBUG, "P2P: * OOB GO Negotiation Channel: Operating "
343 "Class %u Channel %u Role %d",
344 oper_class, channel, role);
345}
346
347
1a94b0ad
BG		 348void p2p_buf_add_service_hash(struct wpabuf *buf, struct p2p_data *p2p)
349{
350 if (!p2p)
351 return;
352
353 /* Service Hash */
354 wpabuf_put_u8(buf, P2P_ATTR_SERVICE_HASH);
355 wpabuf_put_le16(buf, p2p->p2ps_seek_count * P2PS_HASH_LEN);
e12c4004 356 wpabuf_put_data(buf, p2p->p2ps_seek_hash,
1a94b0ad
BG		 357 p2p->p2ps_seek_count * P2PS_HASH_LEN);
358 wpa_hexdump(MSG_DEBUG, "P2P: * Service Hash",
e12c4004 359 p2p->p2ps_seek_hash, p2p->p2ps_seek_count * P2PS_HASH_LEN);
1a94b0ad
BG		 360}
361
362
5f18501f
KV		 363void p2p_buf_add_session_info(struct wpabuf *buf, const char *info)
364{
365 size_t info_len = 0;
366
367 if (info && info[0])
368 info_len = os_strlen(info);
369
370 /* Session Information Data Info */
371 wpabuf_put_u8(buf, P2P_ATTR_SESSION_INFORMATION_DATA);
372 wpabuf_put_le16(buf, (u16) info_len);
373
374 if (info) {
375 wpabuf_put_data(buf, info, info_len);
376 wpa_printf(MSG_DEBUG, "P2P: * Session Info Data (%s)", info);
377 }
378}
379
380
381void p2p_buf_add_connection_capability(struct wpabuf *buf, u8 connection_cap)
382{
383 /* Connection Capability Info */
384 wpabuf_put_u8(buf, P2P_ATTR_CONNECTION_CAPABILITY);
385 wpabuf_put_le16(buf, 1);
386 wpabuf_put_u8(buf, connection_cap);
387 wpa_printf(MSG_DEBUG, "P2P: * Connection Capability: 0x%x",
388 connection_cap);
389}
390
391
392void p2p_buf_add_advertisement_id(struct wpabuf *buf, u32 id, const u8 *mac)
393{
394 if (!buf || !mac)
395 return;
396
397 /* Advertisement ID Info */
398 wpabuf_put_u8(buf, P2P_ATTR_ADVERTISEMENT_ID);
399 wpabuf_put_le16(buf, (u16) (sizeof(u32) + ETH_ALEN));
400 wpabuf_put_le32(buf, id);
401 wpabuf_put_data(buf, mac, ETH_ALEN);
402 wpa_printf(MSG_DEBUG, "P2P: * Advertisement ID (%x) " MACSTR,
403 id, MAC2STR(mac));
404}
405
406
c5d3cadb
MS		 407static int p2ps_wildcard_hash(struct p2p_data *p2p,
408 const u8 *hash, u8 hash_count)
4660e732 409{
c5d3cadb
MS		 410 u8 i;
411 const u8 *test = hash;
4660e732 412
c5d3cadb
MS		 413 for (i = 0; i < hash_count; i++) {
414 if (os_memcmp(test, p2p->wild_card_hash, P2PS_HASH_LEN) == 0)
415 return 1;
416 test += P2PS_HASH_LEN;
417 }
4660e732 418
c5d3cadb
MS		 419 return 0;
420}
4660e732 421
4660e732 422
509f269b
JM		 423static int p2p_wfa_service_adv(struct p2p_data *p2p)
424{
425 struct p2ps_advertisement *adv;
426
427 for (adv = p2p->p2ps_adv_list; adv; adv = adv->next) {
428 if (os_strncmp(adv->svc_name, P2PS_WILD_HASH_STR,
429 os_strlen(P2PS_WILD_HASH_STR)) == 0)
430 return 1;
431 }
432
433 return 0;
434}
435
436
c5d3cadb
MS		 437static int p2p_buf_add_service_info(struct wpabuf *buf, struct p2p_data *p2p,
438 u32 adv_id, u16 config_methods,
439 const char *svc_name, u8 **ie_len, u8 **pos,
440 size_t *total_len, u8 *attr_len)
441{
442 size_t svc_len;
443 size_t remaining;
444 size_t info_len;
445
5fa5f843 446 p2p_dbg(p2p, "Add service info for %s (adv_id=%u)", svc_name, adv_id);
c5d3cadb
MS		 447 svc_len = os_strlen(svc_name);
448 info_len = sizeof(adv_id) + sizeof(config_methods) + sizeof(u8) +
449 svc_len;
450
451 if (info_len + *total_len > MAX_SVC_ADV_LEN) {
452 p2p_dbg(p2p,
453 "Unsufficient buffer, failed to add advertised service info");
454 return -1;
455 }
4660e732 456
c5d3cadb
MS		 457 if (svc_len > 255) {
458 p2p_dbg(p2p,
459 "Invalid service name length (%u bytes), failed to add advertised service info",
460 (unsigned int) svc_len);
461 return -1;
462 }
4660e732 463
c5d3cadb
MS		 464 if (*ie_len) {
465 int ie_data_len = (*pos - *ie_len) - 1;
4660e732 466
c5d3cadb
MS		 467 if (ie_data_len < 0 || ie_data_len > 255) {
468 p2p_dbg(p2p,
469 "Invalid IE length, failed to add advertised service info");
470 return -1;
4660e732 471 }
c5d3cadb
MS		 472 remaining = 255 - ie_data_len;
473 } else {
474 /*
475 * Adding new P2P IE header takes 6 extra bytes:
476 * - 2 byte IE header (1 byte IE id and 1 byte length)
477 * - 4 bytes of IE_VENDOR_TYPE are reduced from 255 below
478 */
479 *ie_len = p2p_buf_add_ie_hdr(buf);
480 remaining = 255 - 4;
481 }
4660e732 482
c5d3cadb
MS		 483 if (remaining < sizeof(u32) + sizeof(u16) + sizeof(u8)) {
484 /*
485 * Split adv_id, config_methods, and svc_name_len between two
486 * IEs.
487 */
488 size_t front = remaining;
489 size_t back = sizeof(u32) + sizeof(u16) + sizeof(u8) - front;
490 u8 holder[sizeof(u32) + sizeof(u16) + sizeof(u8)];
4660e732 491
c5d3cadb
MS		 492 WPA_PUT_LE32(holder, adv_id);
493 WPA_PUT_BE16(&holder[sizeof(u32)], config_methods);
494 holder[sizeof(u32) + sizeof(u16)] = svc_len;
4660e732 495
c5d3cadb
MS		 496 if (front)
497 wpabuf_put_data(buf, holder, front);
4660e732 498
c5d3cadb
MS		 499 p2p_buf_update_ie_hdr(buf, *ie_len);
500 *ie_len = p2p_buf_add_ie_hdr(buf);
501
502 wpabuf_put_data(buf, &holder[front], back);
503 remaining = 255 - 4 - (sizeof(u32) + sizeof(u16) + sizeof(u8)) -
504 back;
505 } else {
506 wpabuf_put_le32(buf, adv_id);
507 wpabuf_put_be16(buf, config_methods);
508 wpabuf_put_u8(buf, svc_len);
509 remaining -= sizeof(adv_id) + sizeof(config_methods) +
510 sizeof(u8);
511 }
4660e732 512
c5d3cadb
MS		 513 if (remaining < svc_len) {
514 /* split svc_name between two or three IEs */
515 size_t front = remaining;
516 size_t back = svc_len - front;
517
518 if (front)
519 wpabuf_put_data(buf, svc_name, front);
520
521 p2p_buf_update_ie_hdr(buf, *ie_len);
522 *ie_len = p2p_buf_add_ie_hdr(buf);
523
524 /* In rare cases, we must split across 3 attributes */
525 if (back > 255 - 4) {
526 wpabuf_put_data(buf, &svc_name[front], 255 - 4);
527 back -= 255 - 4;
528 front += 255 - 4;
529 p2p_buf_update_ie_hdr(buf, *ie_len);
530 *ie_len = p2p_buf_add_ie_hdr(buf);
4660e732
BG		 531 }
532
c5d3cadb
MS		 533 wpabuf_put_data(buf, &svc_name[front], back);
534 remaining = 255 - 4 - back;
535 } else {
536 wpabuf_put_data(buf, svc_name, svc_len);
537 remaining -= svc_len;
4660e732
BG		 538 }
539
c5d3cadb 540 p2p_buf_update_ie_hdr(buf, *ie_len);
4660e732 541
c5d3cadb
MS		 542 /* set *ie_len to NULL if a new IE has to be added on the next call */
543 if (!remaining)
544 *ie_len = NULL;
4660e732 545
c5d3cadb
MS		 546 /* set *pos to point to the next byte to update */
547 *pos = wpabuf_put(buf, 0);
4660e732 548
c5d3cadb
MS		 549 *total_len += info_len;
550 WPA_PUT_LE16(attr_len, (u16) *total_len);
551 return 0;
552}
4660e732 553
4660e732 554
c5d3cadb
MS		 555void p2p_buf_add_service_instance(struct wpabuf *buf, struct p2p_data *p2p,
556 u8 hash_count, const u8 *hash,
557 struct p2ps_advertisement *adv_list)
558{
559 struct p2ps_advertisement *adv;
50a9efe7 560 int p2ps_wildcard, found = 0;
c5d3cadb
MS		 561 size_t total_len;
562 struct wpabuf *tmp_buf = NULL;
563 u8 *pos, *attr_len, *ie_len = NULL;
564
565 if (!adv_list || !hash || !hash_count)
566 return;
567
5fa5f843
JM		 568 wpa_hexdump(MSG_DEBUG, "P2PS: Probe Request service hash values",
569 hash, hash_count * P2PS_HASH_LEN);
509f269b
JM		 570 p2ps_wildcard = p2ps_wildcard_hash(p2p, hash, hash_count) &&
571 p2p_wfa_service_adv(p2p);
c5d3cadb
MS		 572
573 /* Allocate temp buffer, allowing for overflow of 1 instance */
574 tmp_buf = wpabuf_alloc(MAX_SVC_ADV_IE_LEN + 256 + P2PS_HASH_LEN);
575 if (!tmp_buf)
576 return;
577
578 /*
579 * Attribute data can be split into a number of IEs. Start with the
580 * first IE and the attribute headers here.
581 */
582 ie_len = p2p_buf_add_ie_hdr(tmp_buf);
583
584 total_len = 0;
585
586 wpabuf_put_u8(tmp_buf, P2P_ATTR_ADVERTISED_SERVICE);
587 attr_len = wpabuf_put(tmp_buf, sizeof(u16));
588 WPA_PUT_LE16(attr_len, (u16) total_len);
589 p2p_buf_update_ie_hdr(tmp_buf, ie_len);
590 pos = wpabuf_put(tmp_buf, 0);
591
83e520e4 592 if (p2ps_wildcard) {
50a9efe7 593 /* org.wi-fi.wfds match found */
83e520e4
MS		 594 p2p_buf_add_service_info(tmp_buf, p2p, 0, 0, P2PS_WILD_HASH_STR,
595 &ie_len, &pos, &total_len, attr_len);
50a9efe7 596 found++;
83e520e4
MS		 597 }
598
c5d3cadb
MS		 599 /* add advertised service info of matching services */
600 for (adv = adv_list; adv && total_len <= MAX_SVC_ADV_LEN;
601 adv = adv->next) {
602 const u8 *test = hash;
603 u8 i;
604
605 for (i = 0; i < hash_count; i++) {
606 /* exact name hash match */
607 if (os_memcmp(test, adv->hash, P2PS_HASH_LEN) == 0 &&
608 p2p_buf_add_service_info(tmp_buf, p2p,
609 adv->id,
610 adv->config_methods,
611 adv->svc_name,
612 &ie_len, &pos,
613 &total_len,
50a9efe7
JM		 614 attr_len))
615 break;
616 found++;
c5d3cadb
MS		 617 test += P2PS_HASH_LEN;
618 }
619 }
620
50a9efe7 621 if (found)
c5d3cadb 622 wpabuf_put_buf(buf, tmp_buf);
4660e732
BG		 623 wpabuf_free(tmp_buf);
624}
625
626
5f18501f
KV		 627void p2p_buf_add_session_id(struct wpabuf *buf, u32 id, const u8 *mac)
628{
629 if (!buf || !mac)
630 return;
631
632 /* Session ID Info */
633 wpabuf_put_u8(buf, P2P_ATTR_SESSION_ID);
634 wpabuf_put_le16(buf, (u16) (sizeof(u32) + ETH_ALEN));
635 wpabuf_put_le32(buf, id);
636 wpabuf_put_data(buf, mac, ETH_ALEN);
637 wpa_printf(MSG_DEBUG, "P2P: * Session ID Info (%x) " MACSTR,
638 id, MAC2STR(mac));
639}
640
641
642void p2p_buf_add_feature_capability(struct wpabuf *buf, u16 len, const u8 *mask)
643{
644 if (!buf || !len || !mask)
645 return;
646
647 /* Feature Capability */
648 wpabuf_put_u8(buf, P2P_ATTR_FEATURE_CAPABILITY);
649 wpabuf_put_le16(buf, len);
650 wpabuf_put_data(buf, mask, len);
651 wpa_printf(MSG_DEBUG, "P2P: * Feature Capability (%d)", len);
652}
653
654
655void p2p_buf_add_persistent_group_info(struct wpabuf *buf, const u8 *dev_addr,
656 const u8 *ssid, size_t ssid_len)
657{
658 /* P2P Group ID */
659 wpabuf_put_u8(buf, P2P_ATTR_PERSISTENT_GROUP);
660 wpabuf_put_le16(buf, ETH_ALEN + ssid_len);
661 wpabuf_put_data(buf, dev_addr, ETH_ALEN);
662 wpabuf_put_data(buf, ssid, ssid_len);
663 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR,
664 MAC2STR(dev_addr));
665}
666
667
33183761
JM		 668static int p2p_add_wps_string(struct wpabuf *buf, enum wps_attribute attr,
669 const char *val)
b6e01800
JM		 670{
671 size_t len;
672
b6e01800 673 len = val ? os_strlen(val) : 0;
33183761
JM		 674 if (wpabuf_tailroom(buf) < 4 + len)
675 return -1;
676 wpabuf_put_be16(buf, attr);
b6e01800
JM		 677#ifndef CONFIG_WPS_STRICT
678 if (len == 0) {
679 /*
680 * Some deployed WPS implementations fail to parse zeor-length
681 * attributes. As a workaround, send a space character if the
682 * device attribute string is empty.
683 */
33183761
JM		 684 if (wpabuf_tailroom(buf) < 3)
685 return -1;
b6e01800
JM		 686 wpabuf_put_be16(buf, 1);
687 wpabuf_put_u8(buf, ' ');
33183761 688 return 0;
b6e01800
JM		 689 }
690#endif /* CONFIG_WPS_STRICT */
691 wpabuf_put_be16(buf, len);
692 if (val)
693 wpabuf_put_data(buf, val, len);
33183761 694 return 0;
b6e01800
JM		 695}
696
697
33183761
JM		 698int p2p_build_wps_ie(struct p2p_data *p2p, struct wpabuf *buf, int pw_id,
699 int all_attr)
b22128ef
JM		 700{
701 u8 *len;
f95cac27
JMB		 702 int i;
703
33183761
JM		 704 if (wpabuf_tailroom(buf) < 6)
705 return -1;
b22128ef
JM		 706 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
707 len = wpabuf_put(buf, 1);
708 wpabuf_put_be32(buf, WPS_DEV_OUI_WFA);
709
33183761
JM		 710 if (wps_build_version(buf) < 0)
711 return -1;
b22128ef
JM		 712
713 if (all_attr) {
33183761
JM		 714 if (wpabuf_tailroom(buf) < 5)
715 return -1;
b22128ef
JM		 716 wpabuf_put_be16(buf, ATTR_WPS_STATE);
717 wpabuf_put_be16(buf, 1);
718 wpabuf_put_u8(buf, WPS_STATE_NOT_CONFIGURED);
719 }
720
360182ed 721 if (pw_id >= 0) {
33183761
JM		 722 if (wpabuf_tailroom(buf) < 6)
723 return -1;
360182ed
JM		 724 /* Device Password ID */
725 wpabuf_put_be16(buf, ATTR_DEV_PASSWORD_ID);
726 wpabuf_put_be16(buf, 2);
727 wpa_printf(MSG_DEBUG, "P2P: WPS IE Device Password ID: %d",
728 pw_id);
729 wpabuf_put_be16(buf, pw_id);
730 }
b22128ef
JM		 731
732 if (all_attr) {
33183761
JM		 733 if (wpabuf_tailroom(buf) < 5)
734 return -1;
b22128ef
JM		 735 wpabuf_put_be16(buf, ATTR_RESPONSE_TYPE);
736 wpabuf_put_be16(buf, 1);
737 wpabuf_put_u8(buf, WPS_RESP_ENROLLEE_INFO);
738
33183761
JM		 739 if (wps_build_uuid_e(buf, p2p->cfg->uuid) < 0 ||
740 p2p_add_wps_string(buf, ATTR_MANUFACTURER,
741 p2p->cfg->manufacturer) < 0 ||
742 p2p_add_wps_string(buf, ATTR_MODEL_NAME,
743 p2p->cfg->model_name) < 0 ||
744 p2p_add_wps_string(buf, ATTR_MODEL_NUMBER,
745 p2p->cfg->model_number) < 0 ||
746 p2p_add_wps_string(buf, ATTR_SERIAL_NUMBER,
747 p2p->cfg->serial_number) < 0)
748 return -1;
749
750 if (wpabuf_tailroom(buf) < 4 + WPS_DEV_TYPE_LEN)
751 return -1;
b22128ef
JM		 752 wpabuf_put_be16(buf, ATTR_PRIMARY_DEV_TYPE);
753 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN);
754 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, WPS_DEV_TYPE_LEN);
755
33183761
JM		 756 if (p2p_add_wps_string(buf, ATTR_DEV_NAME, p2p->cfg->dev_name)
757 < 0)
758 return -1;
b22128ef 759
33183761
JM		 760 if (wpabuf_tailroom(buf) < 6)
761 return -1;
b22128ef
JM		 762 wpabuf_put_be16(buf, ATTR_CONFIG_METHODS);
763 wpabuf_put_be16(buf, 2);
b6e01800 764 wpabuf_put_be16(buf, p2p->cfg->config_methods);
b22128ef
JM		 765 }
766
33183761
JM		 767 if (wps_build_wfa_ext(buf, 0, NULL, 0) < 0)
768 return -1;
b22128ef 769
8e8c0df1 770 if (all_attr && p2p->cfg->num_sec_dev_types) {
33183761
JM		 771 if (wpabuf_tailroom(buf) <
772 4 + WPS_DEV_TYPE_LEN * p2p->cfg->num_sec_dev_types)
773 return -1;
8e8c0df1
JMB		 774 wpabuf_put_be16(buf, ATTR_SECONDARY_DEV_TYPE_LIST);
775 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN *
776 p2p->cfg->num_sec_dev_types);
777 wpabuf_put_data(buf, p2p->cfg->sec_dev_type,
778 WPS_DEV_TYPE_LEN *
779 p2p->cfg->num_sec_dev_types);
780 }
781
f95cac27 782 /* Add the WPS vendor extensions */
10c5d2a5 783 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
f95cac27
JMB		 784 if (p2p->wps_vendor_ext[i] == NULL)
785 break;
786 if (wpabuf_tailroom(buf) <
787 4 + wpabuf_len(p2p->wps_vendor_ext[i]))
788 continue;
789 wpabuf_put_be16(buf, ATTR_VENDOR_EXT);
790 wpabuf_put_be16(buf, wpabuf_len(p2p->wps_vendor_ext[i]));
791 wpabuf_put_buf(buf, p2p->wps_vendor_ext[i]);
792 }
793
b22128ef 794 p2p_buf_update_ie_hdr(buf, len);
33183761
JM		 795
796 return 0;
b22128ef 797}
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