p2p_build.c revision f06196652a3e12af00503f4a548c56d4e60f7246
1/* 2 * P2P - IE builder 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 "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); 20 wpabuf_put_be24(buf, OUI_WFA); 21 wpabuf_put_u8(buf, P2P_OUI_TYPE); 22 23 wpabuf_put_u8(buf, subtype); /* OUI Subtype */ 24 wpabuf_put_u8(buf, dialog_token); 25 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token); 26} 27 28 29void p2p_buf_add_public_action_hdr(struct wpabuf *buf, u8 subtype, 30 u8 dialog_token) 31{ 32 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); 33 wpabuf_put_u8(buf, WLAN_PA_VENDOR_SPECIFIC); 34 wpabuf_put_be24(buf, OUI_WFA); 35 wpabuf_put_u8(buf, P2P_OUI_TYPE); 36 37 wpabuf_put_u8(buf, subtype); /* OUI Subtype */ 38 wpabuf_put_u8(buf, dialog_token); 39 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token); 40} 41 42 43u8 * p2p_buf_add_ie_hdr(struct wpabuf *buf) 44{ 45 u8 *len; 46 47 /* P2P IE header */ 48 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); 49 len = wpabuf_put(buf, 1); /* IE length to be filled */ 50 wpabuf_put_be24(buf, OUI_WFA); 51 wpabuf_put_u8(buf, P2P_OUI_TYPE); 52 wpa_printf(MSG_DEBUG, "P2P: * P2P IE header"); 53 return len; 54} 55 56 57void p2p_buf_update_ie_hdr(struct wpabuf *buf, u8 *len) 58{ 59 /* Update P2P IE Length */ 60 *len = (u8 *) wpabuf_put(buf, 0) - len - 1; 61} 62 63 64void p2p_buf_add_capability(struct wpabuf *buf, u8 dev_capab, u8 group_capab) 65{ 66 /* P2P Capability */ 67 wpabuf_put_u8(buf, P2P_ATTR_CAPABILITY); 68 wpabuf_put_le16(buf, 2); 69 wpabuf_put_u8(buf, dev_capab); /* Device Capabilities */ 70 wpabuf_put_u8(buf, group_capab); /* Group Capabilities */ 71 wpa_printf(MSG_DEBUG, "P2P: * Capability dev=%02x group=%02x", 72 dev_capab, group_capab); 73} 74 75 76void p2p_buf_add_go_intent(struct wpabuf *buf, u8 go_intent) 77{ 78 /* Group Owner Intent */ 79 wpabuf_put_u8(buf, P2P_ATTR_GROUP_OWNER_INTENT); 80 wpabuf_put_le16(buf, 1); 81 wpabuf_put_u8(buf, go_intent); 82 wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u Tie breaker %u", 83 go_intent >> 1, go_intent & 0x01); 84} 85 86 87void p2p_buf_add_listen_channel(struct wpabuf *buf, const char *country, 88 u8 reg_class, u8 channel) 89{ 90 /* Listen Channel */ 91 wpabuf_put_u8(buf, P2P_ATTR_LISTEN_CHANNEL); 92 wpabuf_put_le16(buf, 5); 93 wpabuf_put_data(buf, country, 3); 94 wpabuf_put_u8(buf, reg_class); /* Regulatory Class */ 95 wpabuf_put_u8(buf, channel); /* Channel Number */ 96 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Regulatory Class %u " 97 "Channel %u", reg_class, channel); 98} 99 100 101void p2p_buf_add_operating_channel(struct wpabuf *buf, const char *country, 102 u8 reg_class, u8 channel) 103{ 104 /* Operating Channel */ 105 wpabuf_put_u8(buf, P2P_ATTR_OPERATING_CHANNEL); 106 wpabuf_put_le16(buf, 5); 107 wpabuf_put_data(buf, country, 3); 108 wpabuf_put_u8(buf, reg_class); /* Regulatory Class */ 109 wpabuf_put_u8(buf, channel); /* Channel Number */ 110 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: Regulatory Class %u " 111 "Channel %u", reg_class, channel); 112} 113 114 115void p2p_buf_add_channel_list(struct wpabuf *buf, const char *country, 116 struct p2p_channels *chan) 117{ 118 u8 *len; 119 size_t i; 120 121 /* Channel List */ 122 wpabuf_put_u8(buf, P2P_ATTR_CHANNEL_LIST); 123 len = wpabuf_put(buf, 2); /* IE length to be filled */ 124 wpabuf_put_data(buf, country, 3); /* Country String */ 125 126 for (i = 0; i < chan->reg_classes; i++) { 127 struct p2p_reg_class *c = &chan->reg_class[i]; 128 wpabuf_put_u8(buf, c->reg_class); 129 wpabuf_put_u8(buf, c->channels); 130 wpabuf_put_data(buf, c->channel, c->channels); 131 } 132 133 /* Update attribute length */ 134 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2); 135 wpa_printf(MSG_DEBUG, "P2P: * Channel List"); 136} 137 138#ifdef ANDROID_P2P 139/* Adds a given channel as the only channel in channel list attribute */ 140void p2p_buf_add_oper_as_channel_list(struct wpabuf *buf, const char *country, 141 u8 reg_class, u8 channel) 142{ 143 u8 *len; 144 u8 channel_list[1]; 145 channel_list[0] = channel; 146 147 /* Channel List */ 148 wpabuf_put_u8(buf, P2P_ATTR_CHANNEL_LIST); 149 len = wpabuf_put(buf, 2); /* IE length to be filled */ 150 wpabuf_put_data(buf, country, 3); /* Country String */ 151 152 wpabuf_put_u8(buf, reg_class); 153 wpabuf_put_u8(buf, 1); 154 wpabuf_put_data(buf, channel_list, 1); 155 156 /* Update attribute length */ 157 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2); 158 wpa_printf(MSG_DEBUG, "P2P: * Oper as Channel List %u", channel); 159} 160#endif 161 162void p2p_buf_add_status(struct wpabuf *buf, u8 status) 163{ 164 /* Status */ 165 wpabuf_put_u8(buf, P2P_ATTR_STATUS); 166 wpabuf_put_le16(buf, 1); 167 wpabuf_put_u8(buf, status); 168 wpa_printf(MSG_DEBUG, "P2P: * Status: %d", status); 169} 170 171 172void p2p_buf_add_device_info(struct wpabuf *buf, struct p2p_data *p2p, 173 struct p2p_device *peer) 174{ 175 u8 *len; 176 u16 methods; 177 size_t nlen, i; 178 179 /* P2P Device Info */ 180 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_INFO); 181 len = wpabuf_put(buf, 2); /* IE length to be filled */ 182 183 /* P2P Device address */ 184 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 185 186 /* Config Methods */ 187 methods = 0; 188 if (peer && peer->wps_method != WPS_NOT_READY) { 189 if (peer->wps_method == WPS_PBC) 190 methods |= WPS_CONFIG_PUSHBUTTON; 191 else if (peer->wps_method == WPS_PIN_DISPLAY || 192 peer->wps_method == WPS_PIN_KEYPAD) 193 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 194 } else if (p2p->cfg->config_methods) { 195 methods |= p2p->cfg->config_methods & 196 (WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_DISPLAY | 197 WPS_CONFIG_KEYPAD); 198 } else { 199 methods |= WPS_CONFIG_PUSHBUTTON; 200 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 201 } 202 wpabuf_put_be16(buf, methods); 203 204 /* Primary Device Type */ 205 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, 206 sizeof(p2p->cfg->pri_dev_type)); 207 208 /* Number of Secondary Device Types */ 209 wpabuf_put_u8(buf, p2p->cfg->num_sec_dev_types); 210 211 /* Secondary Device Type List */ 212 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 213 wpabuf_put_data(buf, p2p->cfg->sec_dev_type[i], 214 WPS_DEV_TYPE_LEN); 215 216 /* Device Name */ 217 nlen = p2p->cfg->dev_name ? os_strlen(p2p->cfg->dev_name) : 0; 218 wpabuf_put_be16(buf, ATTR_DEV_NAME); 219 wpabuf_put_be16(buf, nlen); 220 wpabuf_put_data(buf, p2p->cfg->dev_name, nlen); 221 222 /* Update attribute length */ 223 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2); 224 wpa_printf(MSG_DEBUG, "P2P: * Device Info"); 225} 226 227 228void p2p_buf_add_device_id(struct wpabuf *buf, const u8 *dev_addr) 229{ 230 /* P2P Device ID */ 231 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_ID); 232 wpabuf_put_le16(buf, ETH_ALEN); 233 wpabuf_put_data(buf, dev_addr, ETH_ALEN); 234 wpa_printf(MSG_DEBUG, "P2P: * Device ID: " MACSTR, MAC2STR(dev_addr)); 235} 236 237 238void p2p_buf_add_config_timeout(struct wpabuf *buf, u8 go_timeout, 239 u8 client_timeout) 240{ 241 /* Configuration Timeout */ 242 wpabuf_put_u8(buf, P2P_ATTR_CONFIGURATION_TIMEOUT); 243 wpabuf_put_le16(buf, 2); 244 wpabuf_put_u8(buf, go_timeout); 245 wpabuf_put_u8(buf, client_timeout); 246 wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout: GO %d (*10ms) " 247 "client %d (*10ms)", go_timeout, client_timeout); 248} 249 250 251void p2p_buf_add_intended_addr(struct wpabuf *buf, const u8 *interface_addr) 252{ 253 /* Intended P2P Interface Address */ 254 wpabuf_put_u8(buf, P2P_ATTR_INTENDED_INTERFACE_ADDR); 255 wpabuf_put_le16(buf, ETH_ALEN); 256 wpabuf_put_data(buf, interface_addr, ETH_ALEN); 257 wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address " MACSTR, 258 MAC2STR(interface_addr)); 259} 260 261 262void p2p_buf_add_group_bssid(struct wpabuf *buf, const u8 *bssid) 263{ 264 /* P2P Group BSSID */ 265 wpabuf_put_u8(buf, P2P_ATTR_GROUP_BSSID); 266 wpabuf_put_le16(buf, ETH_ALEN); 267 wpabuf_put_data(buf, bssid, ETH_ALEN); 268 wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID " MACSTR, 269 MAC2STR(bssid)); 270} 271 272 273void p2p_buf_add_group_id(struct wpabuf *buf, const u8 *dev_addr, 274 const u8 *ssid, size_t ssid_len) 275{ 276 /* P2P Group ID */ 277 wpabuf_put_u8(buf, P2P_ATTR_GROUP_ID); 278 wpabuf_put_le16(buf, ETH_ALEN + ssid_len); 279 wpabuf_put_data(buf, dev_addr, ETH_ALEN); 280 wpabuf_put_data(buf, ssid, ssid_len); 281 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR, 282 MAC2STR(dev_addr)); 283} 284 285 286void p2p_buf_add_invitation_flags(struct wpabuf *buf, u8 flags) 287{ 288 /* Invitation Flags */ 289 wpabuf_put_u8(buf, P2P_ATTR_INVITATION_FLAGS); 290 wpabuf_put_le16(buf, 1); 291 wpabuf_put_u8(buf, flags); 292 wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x", flags); 293} 294 295 296static void p2p_buf_add_noa_desc(struct wpabuf *buf, struct p2p_noa_desc *desc) 297{ 298 if (desc == NULL) 299 return; 300 301 wpabuf_put_u8(buf, desc->count_type); 302 wpabuf_put_le32(buf, desc->duration); 303 wpabuf_put_le32(buf, desc->interval); 304 wpabuf_put_le32(buf, desc->start_time); 305} 306 307 308void p2p_buf_add_noa(struct wpabuf *buf, u8 noa_index, u8 opp_ps, u8 ctwindow, 309 struct p2p_noa_desc *desc1, struct p2p_noa_desc *desc2) 310{ 311 /* Notice of Absence */ 312 wpabuf_put_u8(buf, P2P_ATTR_NOTICE_OF_ABSENCE); 313 wpabuf_put_le16(buf, 2 + (desc1 ? 13 : 0) + (desc2 ? 13 : 0)); 314 wpabuf_put_u8(buf, noa_index); 315 wpabuf_put_u8(buf, (opp_ps ? 0x80 : 0) | (ctwindow & 0x7f)); 316 p2p_buf_add_noa_desc(buf, desc1); 317 p2p_buf_add_noa_desc(buf, desc2); 318 wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence"); 319} 320 321 322void p2p_buf_add_ext_listen_timing(struct wpabuf *buf, u16 period, 323 u16 interval) 324{ 325 /* Extended Listen Timing */ 326 wpabuf_put_u8(buf, P2P_ATTR_EXT_LISTEN_TIMING); 327 wpabuf_put_le16(buf, 4); 328 wpabuf_put_le16(buf, period); 329 wpabuf_put_le16(buf, interval); 330 wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing (period %u msec " 331 "interval %u msec)", period, interval); 332} 333 334 335void p2p_buf_add_p2p_interface(struct wpabuf *buf, struct p2p_data *p2p) 336{ 337 /* P2P Interface */ 338 wpabuf_put_u8(buf, P2P_ATTR_INTERFACE); 339 wpabuf_put_le16(buf, ETH_ALEN + 1 + ETH_ALEN); 340 /* P2P Device address */ 341 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 342 /* 343 * FIX: Fetch interface address list from driver. Do not include 344 * the P2P Device address if it is never used as interface address. 345 */ 346 /* P2P Interface Address Count */ 347 wpabuf_put_u8(buf, 1); 348 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 349} 350 351 352static void p2p_add_wps_string(struct wpabuf *buf, enum wps_attribute attr, 353 const char *val) 354{ 355 size_t len; 356 357 wpabuf_put_be16(buf, attr); 358 len = val ? os_strlen(val) : 0; 359#ifndef CONFIG_WPS_STRICT 360 if (len == 0) { 361 /* 362 * Some deployed WPS implementations fail to parse zeor-length 363 * attributes. As a workaround, send a space character if the 364 * device attribute string is empty. 365 */ 366 wpabuf_put_be16(buf, 1); 367 wpabuf_put_u8(buf, ' '); 368 return; 369 } 370#endif /* CONFIG_WPS_STRICT */ 371 wpabuf_put_be16(buf, len); 372 if (val) 373 wpabuf_put_data(buf, val, len); 374} 375 376 377void p2p_build_wps_ie(struct p2p_data *p2p, struct wpabuf *buf, int pw_id, 378 int all_attr) 379{ 380 u8 *len; 381 int i; 382 383 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); 384 len = wpabuf_put(buf, 1); 385 wpabuf_put_be32(buf, WPS_DEV_OUI_WFA); 386 387 wps_build_version(buf); 388 389 if (all_attr) { 390 wpabuf_put_be16(buf, ATTR_WPS_STATE); 391 wpabuf_put_be16(buf, 1); 392 wpabuf_put_u8(buf, WPS_STATE_NOT_CONFIGURED); 393 } 394 395 if (pw_id >= 0) { 396 /* Device Password ID */ 397 wpabuf_put_be16(buf, ATTR_DEV_PASSWORD_ID); 398 wpabuf_put_be16(buf, 2); 399 wpa_printf(MSG_DEBUG, "P2P: WPS IE Device Password ID: %d", 400 pw_id); 401 wpabuf_put_be16(buf, pw_id); 402 } 403 404 if (all_attr) { 405 wpabuf_put_be16(buf, ATTR_RESPONSE_TYPE); 406 wpabuf_put_be16(buf, 1); 407 wpabuf_put_u8(buf, WPS_RESP_ENROLLEE_INFO); 408 409 wps_build_uuid_e(buf, p2p->cfg->uuid); 410 p2p_add_wps_string(buf, ATTR_MANUFACTURER, 411 p2p->cfg->manufacturer); 412 p2p_add_wps_string(buf, ATTR_MODEL_NAME, p2p->cfg->model_name); 413 p2p_add_wps_string(buf, ATTR_MODEL_NUMBER, 414 p2p->cfg->model_number); 415 p2p_add_wps_string(buf, ATTR_SERIAL_NUMBER, 416 p2p->cfg->serial_number); 417 418 wpabuf_put_be16(buf, ATTR_PRIMARY_DEV_TYPE); 419 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN); 420 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, WPS_DEV_TYPE_LEN); 421 422 p2p_add_wps_string(buf, ATTR_DEV_NAME, p2p->cfg->dev_name); 423 424 wpabuf_put_be16(buf, ATTR_CONFIG_METHODS); 425 wpabuf_put_be16(buf, 2); 426 wpabuf_put_be16(buf, p2p->cfg->config_methods); 427 } 428 429 wps_build_wfa_ext(buf, 0, NULL, 0); 430 431 if (all_attr && p2p->cfg->num_sec_dev_types) { 432 wpabuf_put_be16(buf, ATTR_SECONDARY_DEV_TYPE_LIST); 433 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN * 434 p2p->cfg->num_sec_dev_types); 435 wpabuf_put_data(buf, p2p->cfg->sec_dev_type, 436 WPS_DEV_TYPE_LEN * 437 p2p->cfg->num_sec_dev_types); 438 } 439 440 /* Add the WPS vendor extensions */ 441 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 442 if (p2p->wps_vendor_ext[i] == NULL) 443 break; 444 if (wpabuf_tailroom(buf) < 445 4 + wpabuf_len(p2p->wps_vendor_ext[i])) 446 continue; 447 wpabuf_put_be16(buf, ATTR_VENDOR_EXT); 448 wpabuf_put_be16(buf, wpabuf_len(p2p->wps_vendor_ext[i])); 449 wpabuf_put_buf(buf, p2p->wps_vendor_ext[i]); 450 } 451 452 p2p_buf_update_ie_hdr(buf, len); 453} 454