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 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 */ 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 } 320 321 322 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 */ 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 return 0; 418 } 419 420 421 /** 422 * p2p_parse - Parse a P2P Action frame contents 423 * @data: Action frame payload after Category and Code fields 424 * @len: Length of data buffer in octets 425 * @msg: Buffer for returning parsed attributes 426 * Returns: 0 on success, -1 on failure 427 * 428 * Note: Caller must free temporary memory allocations by calling 429 * p2p_parse_free() when the parsed data is not needed anymore. 430 */ 431 int p2p_parse(const u8 *data, size_t len, struct p2p_message *msg) 432 { 433 os_memset(msg, 0, sizeof(*msg)); 434 wpa_printf(MSG_DEBUG, "P2P: Parsing the received message"); 435 if (len < 1) { 436 wpa_printf(MSG_DEBUG, "P2P: No Dialog Token in the message"); 437 return -1; 438 } 439 msg->dialog_token = data[0]; 440 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", msg->dialog_token); 441 442 return p2p_parse_ies(data + 1, len - 1, msg); 443 } 444 445 446 /** 447 * p2p_parse_free - Free temporary data from P2P parsing 448 * @msg: Parsed attributes 449 */ 450 void p2p_parse_free(struct p2p_message *msg) 451 { 452 wpabuf_free(msg->p2p_attributes); 453 msg->p2p_attributes = NULL; 454 wpabuf_free(msg->wps_attributes); 455 msg->wps_attributes = NULL; 456 } 457 458 459 int p2p_group_info_parse(const u8 *gi, size_t gi_len, 460 struct p2p_group_info *info) 461 { 462 const u8 *g, *gend; 463 464 os_memset(info, 0, sizeof(*info)); 465 if (gi == NULL) 466 return 0; 467 468 g = gi; 469 gend = gi + gi_len; 470 while (g < gend) { 471 struct p2p_client_info *cli; 472 const u8 *t, *cend; 473 int count; 474 475 cli = &info->client[info->num_clients]; 476 cend = g + 1 + g[0]; 477 if (cend > gend) 478 return -1; /* invalid data */ 479 /* g at start of P2P Client Info Descriptor */ 480 /* t at Device Capability Bitmap */ 481 t = g + 1 + 2 * ETH_ALEN; 482 if (t > cend) 483 return -1; /* invalid data */ 484 cli->p2p_device_addr = g + 1; 485 cli->p2p_interface_addr = g + 1 + ETH_ALEN; 486 cli->dev_capab = t[0]; 487 488 if (t + 1 + 2 + 8 + 1 > cend) 489 return -1; /* invalid data */ 490 491 cli->config_methods = WPA_GET_BE16(&t[1]); 492 cli->pri_dev_type = &t[3]; 493 494 t += 1 + 2 + 8; 495 /* t at Number of Secondary Device Types */ 496 cli->num_sec_dev_types = *t++; 497 if (t + 8 * cli->num_sec_dev_types > cend) 498 return -1; /* invalid data */ 499 cli->sec_dev_types = t; 500 t += 8 * cli->num_sec_dev_types; 501 502 /* t at Device Name in WPS TLV format */ 503 if (t + 2 + 2 > cend) 504 return -1; /* invalid data */ 505 if (WPA_GET_BE16(t) != ATTR_DEV_NAME) 506 return -1; /* invalid Device Name TLV */ 507 t += 2; 508 count = WPA_GET_BE16(t); 509 t += 2; 510 if (count > cend - t) 511 return -1; /* invalid Device Name TLV */ 512 if (count >= 32) 513 count = 32; 514 cli->dev_name = (const char *) t; 515 cli->dev_name_len = count; 516 517 g = cend; 518 519 info->num_clients++; 520 if (info->num_clients == P2P_MAX_GROUP_ENTRIES) 521 return -1; 522 } 523 524 return 0; 525 } 526 527 528 static int p2p_group_info_text(const u8 *gi, size_t gi_len, char *buf, 529 char *end) 530 { 531 char *pos = buf; 532 int ret; 533 struct p2p_group_info info; 534 unsigned int i; 535 536 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 537 return 0; 538 539 for (i = 0; i < info.num_clients; i++) { 540 struct p2p_client_info *cli; 541 char name[33]; 542 char devtype[WPS_DEV_TYPE_BUFSIZE]; 543 u8 s; 544 int count; 545 546 cli = &info.client[i]; 547 ret = os_snprintf(pos, end - pos, "p2p_group_client: " 548 "dev=" MACSTR " iface=" MACSTR, 549 MAC2STR(cli->p2p_device_addr), 550 MAC2STR(cli->p2p_interface_addr)); 551 if (ret < 0 || ret >= end - pos) 552 return pos - buf; 553 pos += ret; 554 555 ret = os_snprintf(pos, end - pos, 556 " dev_capab=0x%x config_methods=0x%x " 557 "dev_type=%s", 558 cli->dev_capab, cli->config_methods, 559 wps_dev_type_bin2str(cli->pri_dev_type, 560 devtype, 561 sizeof(devtype))); 562 if (ret < 0 || ret >= end - pos) 563 return pos - buf; 564 pos += ret; 565 566 for (s = 0; s < cli->num_sec_dev_types; s++) { 567 ret = os_snprintf(pos, end - pos, " dev_type=%s", 568 wps_dev_type_bin2str( 569 &cli->sec_dev_types[s * 8], 570 devtype, sizeof(devtype))); 571 if (ret < 0 || ret >= end - pos) 572 return pos - buf; 573 pos += ret; 574 } 575 576 os_memcpy(name, cli->dev_name, cli->dev_name_len); 577 name[cli->dev_name_len] = '\0'; 578 count = (int) cli->dev_name_len - 1; 579 while (count >= 0) { 580 if (name[count] > 0 && name[count] < 32) 581 name[count] = '_'; 582 count--; 583 } 584 585 ret = os_snprintf(pos, end - pos, " dev_name='%s'\n", name); 586 if (ret < 0 || ret >= end - pos) 587 return pos - buf; 588 pos += ret; 589 } 590 591 return pos - buf; 592 } 593 594 595 /** 596 * p2p_attr_text - Build text format description of P2P IE attributes 597 * @data: P2P IE contents 598 * @buf: Buffer for returning text 599 * @end: Pointer to the end of the buf area 600 * Returns: Number of octets written to the buffer or -1 on faikure 601 * 602 * This function can be used to parse P2P IE contents into text format 603 * field=value lines. 604 */ 605 int p2p_attr_text(struct wpabuf *data, char *buf, char *end) 606 { 607 struct p2p_message msg; 608 char *pos = buf; 609 int ret; 610 611 os_memset(&msg, 0, sizeof(msg)); 612 if (p2p_parse_p2p_ie(data, &msg)) 613 return -1; 614 615 if (msg.capability) { 616 ret = os_snprintf(pos, end - pos, 617 "p2p_dev_capab=0x%x\n" 618 "p2p_group_capab=0x%x\n", 619 msg.capability[0], msg.capability[1]); 620 if (ret < 0 || ret >= end - pos) 621 return pos - buf; 622 pos += ret; 623 } 624 625 if (msg.pri_dev_type) { 626 char devtype[WPS_DEV_TYPE_BUFSIZE]; 627 ret = os_snprintf(pos, end - pos, 628 "p2p_primary_device_type=%s\n", 629 wps_dev_type_bin2str(msg.pri_dev_type, 630 devtype, 631 sizeof(devtype))); 632 if (ret < 0 || ret >= end - pos) 633 return pos - buf; 634 pos += ret; 635 } 636 637 ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n", 638 msg.device_name); 639 if (ret < 0 || ret >= end - pos) 640 return pos - buf; 641 pos += ret; 642 643 if (msg.p2p_device_addr) { 644 ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR 645 "\n", 646 MAC2STR(msg.p2p_device_addr)); 647 if (ret < 0 || ret >= end - pos) 648 return pos - buf; 649 pos += ret; 650 } 651 652 ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n", 653 msg.config_methods); 654 if (ret < 0 || ret >= end - pos) 655 return pos - buf; 656 pos += ret; 657 658 ret = p2p_group_info_text(msg.group_info, msg.group_info_len, 659 pos, end); 660 if (ret < 0) 661 return pos - buf; 662 pos += ret; 663 664 return pos - buf; 665 } 666 667 668 int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie) 669 { 670 struct p2p_message msg; 671 672 os_memset(&msg, 0, sizeof(msg)); 673 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 674 return 0; 675 676 if (!msg.manageability) 677 return 0; 678 679 return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTION_PERMITTED); 680 } 681 682 683 u8 p2p_get_group_capab(const struct wpabuf *p2p_ie) 684 { 685 struct p2p_message msg; 686 687 os_memset(&msg, 0, sizeof(msg)); 688 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 689 return 0; 690 691 if (!msg.capability) 692 return 0; 693 694 return msg.capability[1]; 695 } 696 697 698 const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie) 699 { 700 struct p2p_message msg; 701 702 os_memset(&msg, 0, sizeof(msg)); 703 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 704 return NULL; 705 706 if (msg.p2p_device_addr) 707 return msg.p2p_device_addr; 708 if (msg.device_id) 709 return msg.device_id; 710 711 return NULL; 712 } 713
