3 * Copyright (c) 2009-2010, Atheros Communications
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #include "common/ieee802_11_defs.h"
19 #include "common/ieee802_11_common.h"
20 #include "wps/wps_i.h"
24 static int p2p_parse_attribute(u8 id, const u8 *data, u16 len,
25 struct p2p_message *msg)
29 char devtype[WPS_DEV_TYPE_BUFSIZE];
32 case P2P_ATTR_CAPABILITY:
34 wpa_printf(MSG_DEBUG, "P2P: Too short Capability "
35 "attribute (length %d)", len);
38 msg->capability = data;
39 wpa_printf(MSG_DEBUG, "P2P: * Device Capability %02x "
40 "Group Capability %02x",
43 case P2P_ATTR_DEVICE_ID:
45 wpa_printf(MSG_DEBUG, "P2P: Too short Device ID "
46 "attribute (length %d)", len);
49 msg->device_id = data;
50 wpa_printf(MSG_DEBUG, "P2P: * Device ID " MACSTR,
51 MAC2STR(msg->device_id));
53 case P2P_ATTR_GROUP_OWNER_INTENT:
55 wpa_printf(MSG_DEBUG, "P2P: Too short GO Intent "
56 "attribute (length %d)", len);
59 msg->go_intent = data;
60 wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u "
61 "Tie breaker %u", data[0] >> 1, data[0] & 0x01);
65 wpa_printf(MSG_DEBUG, "P2P: Too short Status "
66 "attribute (length %d)", len);
70 wpa_printf(MSG_DEBUG, "P2P: * Status: %d", data[0]);
72 case P2P_ATTR_LISTEN_CHANNEL:
74 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Ignore "
79 wpa_printf(MSG_DEBUG, "P2P: Too short Listen Channel "
80 "attribute (length %d)", len);
83 msg->listen_channel = data;
84 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: "
85 "Country %c%c(0x%02x) Regulatory "
86 "Class %d Channel Number %d", data[0], data[1],
87 data[2], data[3], data[4]);
89 case P2P_ATTR_OPERATING_CHANNEL:
91 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
92 "Ignore null channel");
96 wpa_printf(MSG_DEBUG, "P2P: Too short Operating "
97 "Channel attribute (length %d)", len);
100 msg->operating_channel = data;
101 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
102 "Country %c%c(0x%02x) Regulatory "
103 "Class %d Channel Number %d", data[0], data[1],
104 data[2], data[3], data[4]);
106 case P2P_ATTR_CHANNEL_LIST:
108 wpa_printf(MSG_DEBUG, "P2P: Too short Channel List "
109 "attribute (length %d)", len);
112 msg->channel_list = data;
113 msg->channel_list_len = len;
114 wpa_printf(MSG_DEBUG, "P2P: * Channel List: Country String "
115 "'%c%c(0x%02x)'", data[0], data[1], data[2]);
116 wpa_hexdump(MSG_MSGDUMP, "P2P: Channel List",
117 msg->channel_list, msg->channel_list_len);
119 case P2P_ATTR_GROUP_INFO:
120 msg->group_info = data;
121 msg->group_info_len = len;
122 wpa_printf(MSG_DEBUG, "P2P: * Group Info");
124 case P2P_ATTR_DEVICE_INFO:
125 if (len < ETH_ALEN + 2 + 8 + 1) {
126 wpa_printf(MSG_DEBUG, "P2P: Too short Device Info "
127 "attribute (length %d)", len);
130 msg->p2p_device_info = data;
131 msg->p2p_device_info_len = len;
133 msg->p2p_device_addr = pos;
135 msg->config_methods = WPA_GET_BE16(pos);
137 msg->pri_dev_type = pos;
139 msg->num_sec_dev_types = *pos++;
140 if (msg->num_sec_dev_types * 8 > data + len - pos) {
141 wpa_printf(MSG_DEBUG, "P2P: Device Info underflow");
144 pos += msg->num_sec_dev_types * 8;
145 if (data + len - pos < 4) {
146 wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
147 "length %d", (int) (data + len - pos));
150 if (WPA_GET_BE16(pos) != ATTR_DEV_NAME) {
151 wpa_hexdump(MSG_DEBUG, "P2P: Unexpected Device Name "
156 nlen = WPA_GET_BE16(pos);
158 if (data + len - pos < (int) nlen || nlen > 32) {
159 wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
160 "length %d (buf len %d)", (int) nlen,
161 (int) (data + len - pos));
164 os_memcpy(msg->device_name, pos, nlen);
165 for (i = 0; i < nlen; i++) {
166 if (msg->device_name[i] == '\0')
168 if (msg->device_name[i] < 32)
169 msg->device_name[i] = '_';
171 wpa_printf(MSG_DEBUG, "P2P: * Device Info: addr " MACSTR
172 " primary device type %s device name '%s' "
173 "config methods 0x%x",
174 MAC2STR(msg->p2p_device_addr),
175 wps_dev_type_bin2str(msg->pri_dev_type, devtype,
177 msg->device_name, msg->config_methods);
179 case P2P_ATTR_CONFIGURATION_TIMEOUT:
181 wpa_printf(MSG_DEBUG, "P2P: Too short Configuration "
182 "Timeout attribute (length %d)", len);
185 msg->config_timeout = data;
186 wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout");
188 case P2P_ATTR_INTENDED_INTERFACE_ADDR:
189 if (len < ETH_ALEN) {
190 wpa_printf(MSG_DEBUG, "P2P: Too short Intended P2P "
191 "Interface Address attribute (length %d)",
195 msg->intended_addr = data;
196 wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address: "
197 MACSTR, MAC2STR(msg->intended_addr));
199 case P2P_ATTR_GROUP_BSSID:
200 if (len < ETH_ALEN) {
201 wpa_printf(MSG_DEBUG, "P2P: Too short P2P Group BSSID "
202 "attribute (length %d)", len);
205 msg->group_bssid = data;
206 wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID: " MACSTR,
207 MAC2STR(msg->group_bssid));
209 case P2P_ATTR_GROUP_ID:
210 if (len < ETH_ALEN || len > ETH_ALEN + 32) {
211 wpa_printf(MSG_DEBUG, "P2P: Invalid P2P Group ID "
212 "attribute length %d", len);
215 msg->group_id = data;
216 msg->group_id_len = len;
217 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID: Device Address "
218 MACSTR, MAC2STR(msg->group_id));
219 wpa_hexdump_ascii(MSG_DEBUG, "P2P: * P2P Group ID: SSID",
220 msg->group_id + ETH_ALEN,
221 msg->group_id_len - ETH_ALEN);
223 case P2P_ATTR_INVITATION_FLAGS:
225 wpa_printf(MSG_DEBUG, "P2P: Too short Invitation "
226 "Flag attribute (length %d)", len);
229 msg->invitation_flags = data;
230 wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x",
233 case P2P_ATTR_MANAGEABILITY:
235 wpa_printf(MSG_DEBUG, "P2P: Too short Manageability "
236 "attribute (length %d)", len);
239 msg->manageability = data;
240 wpa_printf(MSG_DEBUG, "P2P: * Manageability: bitmap 0x%x",
243 case P2P_ATTR_NOTICE_OF_ABSENCE:
245 wpa_printf(MSG_DEBUG, "P2P: Too short Notice of "
246 "Absence attribute (length %d)", len);
251 wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
253 case P2P_ATTR_EXT_LISTEN_TIMING:
255 wpa_printf(MSG_DEBUG, "P2P: Too short Extended Listen "
256 "Timing attribute (length %d)", len);
259 msg->ext_listen_timing = data;
260 wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing "
261 "(period %u msec interval %u msec)",
262 WPA_GET_LE16(msg->ext_listen_timing),
263 WPA_GET_LE16(msg->ext_listen_timing + 2));
265 case P2P_ATTR_MINOR_REASON_CODE:
267 wpa_printf(MSG_DEBUG, "P2P: Too short Minor Reason "
268 "Code attribute (length %d)", len);
271 msg->minor_reason_code = data;
272 wpa_printf(MSG_DEBUG, "P2P: * Minor Reason Code: %u",
273 *msg->minor_reason_code);
276 wpa_printf(MSG_DEBUG, "P2P: Skipped unknown attribute %d "
277 "(length %d)", id, len);
286 * p2p_parse_p2p_ie - Parse P2P IE
287 * @buf: Concatenated P2P IE(s) payload
288 * @msg: Buffer for returning parsed attributes
289 * Returns: 0 on success, -1 on failure
291 * Note: Caller is responsible for clearing the msg data structure before
292 * calling this function.
294 int p2p_parse_p2p_ie(const struct wpabuf *buf, struct p2p_message *msg)
296 const u8 *pos = wpabuf_head_u8(buf);
297 const u8 *end = pos + wpabuf_len(buf);
299 wpa_printf(MSG_DEBUG, "P2P: Parsing P2P IE");
303 if (pos + 2 >= end) {
304 wpa_printf(MSG_DEBUG, "P2P: Invalid P2P attribute");
307 attr_len = WPA_GET_LE16(pos + 1);
308 wpa_printf(MSG_DEBUG, "P2P: Attribute %d length %u",
310 if (pos + 3 + attr_len > end) {
311 wpa_printf(MSG_DEBUG, "P2P: Attribute underflow "
313 attr_len, (int) (end - pos - 3));
314 wpa_hexdump(MSG_MSGDUMP, "P2P: Data", pos, end - pos);
317 if (p2p_parse_attribute(pos[0], pos + 3, attr_len, msg))
326 static int p2p_parse_wps_ie(const struct wpabuf *buf, struct p2p_message *msg)
328 struct wps_parse_attr attr;
330 wpa_printf(MSG_DEBUG, "P2P: Parsing WPS IE");
331 if (wps_parse_msg(buf, &attr))
333 if (attr.dev_name && attr.dev_name_len < sizeof(msg->device_name) &&
334 !msg->device_name[0])
335 os_memcpy(msg->device_name, attr.dev_name, attr.dev_name_len);
336 if (attr.config_methods) {
337 msg->wps_config_methods =
338 WPA_GET_BE16(attr.config_methods);
339 wpa_printf(MSG_DEBUG, "P2P: Config Methods (WPS): 0x%x",
340 msg->wps_config_methods);
342 if (attr.dev_password_id) {
343 msg->dev_password_id = WPA_GET_BE16(attr.dev_password_id);
344 wpa_printf(MSG_DEBUG, "P2P: Device Password ID: %d",
345 msg->dev_password_id);
347 if (attr.primary_dev_type) {
348 char devtype[WPS_DEV_TYPE_BUFSIZE];
349 msg->wps_pri_dev_type = attr.primary_dev_type;
350 wpa_printf(MSG_DEBUG, "P2P: Primary Device Type (WPS): %s",
351 wps_dev_type_bin2str(msg->wps_pri_dev_type, devtype,
360 * p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE)
361 * @data: IEs from the message
362 * @len: Length of data buffer in octets
363 * @msg: Buffer for returning parsed attributes
364 * Returns: 0 on success, -1 on failure
366 * Note: Caller is responsible for clearing the msg data structure before
367 * calling this function.
369 * Note: Caller must free temporary memory allocations by calling
370 * p2p_parse_free() when the parsed data is not needed anymore.
372 int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg)
374 struct ieee802_11_elems elems;
376 ieee802_11_parse_elems(data, len, &elems, 0);
377 if (elems.ds_params && elems.ds_params_len >= 1)
378 msg->ds_params = elems.ds_params;
380 msg->ssid = elems.ssid - 2;
382 msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len,
384 if (msg->wps_attributes &&
385 p2p_parse_wps_ie(msg->wps_attributes, msg)) {
390 msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len,
392 if (msg->p2p_attributes &&
393 p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
394 wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
395 if (msg->p2p_attributes)
396 wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
397 msg->p2p_attributes);
407 * p2p_parse - Parse a P2P Action frame contents
408 * @data: Action frame payload after Category and Code fields
409 * @len: Length of data buffer in octets
410 * @msg: Buffer for returning parsed attributes
411 * Returns: 0 on success, -1 on failure
413 * Note: Caller must free temporary memory allocations by calling
414 * p2p_parse_free() when the parsed data is not needed anymore.
416 int p2p_parse(const u8 *data, size_t len, struct p2p_message *msg)
418 os_memset(msg, 0, sizeof(*msg));
419 wpa_printf(MSG_DEBUG, "P2P: Parsing the received message");
421 wpa_printf(MSG_DEBUG, "P2P: No Dialog Token in the message");
424 msg->dialog_token = data[0];
425 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", msg->dialog_token);
427 return p2p_parse_ies(data + 1, len - 1, msg);
432 * p2p_parse_free - Free temporary data from P2P parsing
433 * @msg: Parsed attributes
435 void p2p_parse_free(struct p2p_message *msg)
437 wpabuf_free(msg->p2p_attributes);
438 msg->p2p_attributes = NULL;
439 wpabuf_free(msg->wps_attributes);
440 msg->wps_attributes = NULL;
444 int p2p_group_info_parse(const u8 *gi, size_t gi_len,
445 struct p2p_group_info *info)
449 os_memset(info, 0, sizeof(*info));
456 struct p2p_client_info *cli;
460 cli = &info->client[info->num_clients];
463 return -1; /* invalid data */
464 /* g at start of P2P Client Info Descriptor */
465 /* t at Device Capability Bitmap */
466 t = g + 1 + 2 * ETH_ALEN;
468 return -1; /* invalid data */
469 cli->p2p_device_addr = g + 1;
470 cli->p2p_interface_addr = g + 1 + ETH_ALEN;
471 cli->dev_capab = t[0];
473 if (t + 1 + 2 + 8 + 1 > cend)
474 return -1; /* invalid data */
476 cli->config_methods = WPA_GET_BE16(&t[1]);
477 cli->pri_dev_type = &t[3];
480 /* t at Number of Secondary Device Types */
481 cli->num_sec_dev_types = *t++;
482 if (t + 8 * cli->num_sec_dev_types > cend)
483 return -1; /* invalid data */
484 cli->sec_dev_types = t;
485 t += 8 * cli->num_sec_dev_types;
487 /* t at Device Name in WPS TLV format */
488 if (t + 2 + 2 > cend)
489 return -1; /* invalid data */
490 if (WPA_GET_BE16(t) != ATTR_DEV_NAME)
491 return -1; /* invalid Device Name TLV */
493 count = WPA_GET_BE16(t);
495 if (count > cend - t)
496 return -1; /* invalid Device Name TLV */
499 cli->dev_name = (const char *) t;
500 cli->dev_name_len = count;
505 if (info->num_clients == P2P_MAX_GROUP_ENTRIES)
513 static int p2p_group_info_text(const u8 *gi, size_t gi_len, char *buf,
518 struct p2p_group_info info;
521 if (p2p_group_info_parse(gi, gi_len, &info) < 0)
524 for (i = 0; i < info.num_clients; i++) {
525 struct p2p_client_info *cli;
527 char devtype[WPS_DEV_TYPE_BUFSIZE];
531 cli = &info.client[i];
532 ret = os_snprintf(pos, end - pos, "p2p_group_client: "
533 "dev=" MACSTR " iface=" MACSTR,
534 MAC2STR(cli->p2p_device_addr),
535 MAC2STR(cli->p2p_interface_addr));
536 if (ret < 0 || ret >= end - pos)
540 ret = os_snprintf(pos, end - pos,
541 " dev_capab=0x%x config_methods=0x%x "
543 cli->dev_capab, cli->config_methods,
544 wps_dev_type_bin2str(cli->pri_dev_type,
547 if (ret < 0 || ret >= end - pos)
551 for (s = 0; s < cli->num_sec_dev_types; s++) {
552 ret = os_snprintf(pos, end - pos, " dev_type=%s",
553 wps_dev_type_bin2str(
554 &cli->sec_dev_types[s * 8],
555 devtype, sizeof(devtype)));
556 if (ret < 0 || ret >= end - pos)
561 os_memcpy(name, cli->dev_name, cli->dev_name_len);
562 name[cli->dev_name_len] = '\0';
563 count = (int) cli->dev_name_len - 1;
565 if (name[count] < 32)
570 ret = os_snprintf(pos, end - pos, " dev_name='%s'\n", name);
571 if (ret < 0 || ret >= end - pos)
581 * p2p_attr_text - Build text format description of P2P IE attributes
582 * @data: P2P IE contents
583 * @buf: Buffer for returning text
584 * @end: Pointer to the end of the buf area
585 * Returns: Number of octets written to the buffer or -1 on faikure
587 * This function can be used to parse P2P IE contents into text format
590 int p2p_attr_text(struct wpabuf *data, char *buf, char *end)
592 struct p2p_message msg;
596 os_memset(&msg, 0, sizeof(msg));
597 if (p2p_parse_p2p_ie(data, &msg))
600 if (msg.capability) {
601 ret = os_snprintf(pos, end - pos,
602 "p2p_dev_capab=0x%x\n"
603 "p2p_group_capab=0x%x\n",
604 msg.capability[0], msg.capability[1]);
605 if (ret < 0 || ret >= end - pos)
610 if (msg.pri_dev_type) {
611 char devtype[WPS_DEV_TYPE_BUFSIZE];
612 ret = os_snprintf(pos, end - pos,
613 "p2p_primary_device_type=%s\n",
614 wps_dev_type_bin2str(msg.pri_dev_type,
617 if (ret < 0 || ret >= end - pos)
622 ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n",
624 if (ret < 0 || ret >= end - pos)
628 if (msg.p2p_device_addr) {
629 ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR
631 MAC2STR(msg.p2p_device_addr));
632 if (ret < 0 || ret >= end - pos)
637 ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n",
639 if (ret < 0 || ret >= end - pos)
643 ret = p2p_group_info_text(msg.group_info, msg.group_info_len,
653 int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie)
655 struct p2p_message msg;
657 os_memset(&msg, 0, sizeof(msg));
658 if (p2p_parse_p2p_ie(p2p_ie, &msg))
661 if (!msg.manageability)
664 return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTIION_PERMITTED);
668 u8 p2p_get_group_capab(const struct wpabuf *p2p_ie)
670 struct p2p_message msg;
672 os_memset(&msg, 0, sizeof(msg));
673 if (p2p_parse_p2p_ie(p2p_ie, &msg))
679 return msg.capability[1];
683 const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie)
685 struct p2p_message msg;
687 os_memset(&msg, 0, sizeof(msg));
688 if (p2p_parse_p2p_ie(p2p_ie, &msg))
691 if (msg.p2p_device_addr)
692 return msg.p2p_device_addr;
694 return msg.device_id;