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 17 void 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 29 void 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 43 u8 * 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 57 void 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 64 void 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 76 void 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 87 void 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 } 99 100 101 void 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 } 113 114 115 void 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_hexdump(MSG_DEBUG, "P2P: * Channel List", 136 len + 2, (u8 *) wpabuf_put(buf, 0) - len - 2); 137 } 138 139 void p2p_buf_add_status(struct wpabuf *buf, u8 status) 140 { 141 /* Status */ 142 wpabuf_put_u8(buf, P2P_ATTR_STATUS); 143 wpabuf_put_le16(buf, 1); 144 wpabuf_put_u8(buf, status); 145 wpa_printf(MSG_DEBUG, "P2P: * Status: %d", status); 146 } 147 148 149 void p2p_buf_add_device_info(struct wpabuf *buf, struct p2p_data *p2p, 150 struct p2p_device *peer) 151 { 152 u8 *len; 153 u16 methods; 154 size_t nlen, i; 155 156 /* P2P Device Info */ 157 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_INFO); 158 len = wpabuf_put(buf, 2); /* IE length to be filled */ 159 160 /* P2P Device address */ 161 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 162 163 /* Config Methods */ 164 methods = 0; 165 if (peer && peer->wps_method != WPS_NOT_READY) { 166 if (peer->wps_method == WPS_PBC) 167 methods |= WPS_CONFIG_PUSHBUTTON; 168 else if (peer->wps_method == WPS_PIN_DISPLAY || 169 peer->wps_method == WPS_PIN_KEYPAD) 170 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 171 } else if (p2p->cfg->config_methods) { 172 methods |= p2p->cfg->config_methods & 173 (WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_DISPLAY | 174 WPS_CONFIG_KEYPAD); 175 } else { 176 methods |= WPS_CONFIG_PUSHBUTTON; 177 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 178 } 179 wpabuf_put_be16(buf, methods); 180 181 /* Primary Device Type */ 182 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, 183 sizeof(p2p->cfg->pri_dev_type)); 184 185 /* Number of Secondary Device Types */ 186 wpabuf_put_u8(buf, p2p->cfg->num_sec_dev_types); 187 188 /* Secondary Device Type List */ 189 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 190 wpabuf_put_data(buf, p2p->cfg->sec_dev_type[i], 191 WPS_DEV_TYPE_LEN); 192 193 /* Device Name */ 194 nlen = p2p->cfg->dev_name ? os_strlen(p2p->cfg->dev_name) : 0; 195 wpabuf_put_be16(buf, ATTR_DEV_NAME); 196 wpabuf_put_be16(buf, nlen); 197 wpabuf_put_data(buf, p2p->cfg->dev_name, nlen); 198 199 /* Update attribute length */ 200 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2); 201 wpa_printf(MSG_DEBUG, "P2P: * Device Info"); 202 } 203 204 205 void p2p_buf_add_device_id(struct wpabuf *buf, const u8 *dev_addr) 206 { 207 /* P2P Device ID */ 208 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_ID); 209 wpabuf_put_le16(buf, ETH_ALEN); 210 wpabuf_put_data(buf, dev_addr, ETH_ALEN); 211 wpa_printf(MSG_DEBUG, "P2P: * Device ID: " MACSTR, MAC2STR(dev_addr)); 212 } 213 214 215 void p2p_buf_add_config_timeout(struct wpabuf *buf, u8 go_timeout, 216 u8 client_timeout) 217 { 218 /* Configuration Timeout */ 219 wpabuf_put_u8(buf, P2P_ATTR_CONFIGURATION_TIMEOUT); 220 wpabuf_put_le16(buf, 2); 221 wpabuf_put_u8(buf, go_timeout); 222 wpabuf_put_u8(buf, client_timeout); 223 wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout: GO %d (*10ms) " 224 "client %d (*10ms)", go_timeout, client_timeout); 225 } 226 227 228 void p2p_buf_add_intended_addr(struct wpabuf *buf, const u8 *interface_addr) 229 { 230 /* Intended P2P Interface Address */ 231 wpabuf_put_u8(buf, P2P_ATTR_INTENDED_INTERFACE_ADDR); 232 wpabuf_put_le16(buf, ETH_ALEN); 233 wpabuf_put_data(buf, interface_addr, ETH_ALEN); 234 wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address " MACSTR, 235 MAC2STR(interface_addr)); 236 } 237 238 239 void p2p_buf_add_group_bssid(struct wpabuf *buf, const u8 *bssid) 240 { 241 /* P2P Group BSSID */ 242 wpabuf_put_u8(buf, P2P_ATTR_GROUP_BSSID); 243 wpabuf_put_le16(buf, ETH_ALEN); 244 wpabuf_put_data(buf, bssid, ETH_ALEN); 245 wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID " MACSTR, 246 MAC2STR(bssid)); 247 } 248 249 250 void p2p_buf_add_group_id(struct wpabuf *buf, const u8 *dev_addr, 251 const u8 *ssid, size_t ssid_len) 252 { 253 /* P2P Group ID */ 254 wpabuf_put_u8(buf, P2P_ATTR_GROUP_ID); 255 wpabuf_put_le16(buf, ETH_ALEN + ssid_len); 256 wpabuf_put_data(buf, dev_addr, ETH_ALEN); 257 wpabuf_put_data(buf, ssid, ssid_len); 258 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR, 259 MAC2STR(dev_addr)); 260 } 261 262 263 void p2p_buf_add_invitation_flags(struct wpabuf *buf, u8 flags) 264 { 265 /* Invitation Flags */ 266 wpabuf_put_u8(buf, P2P_ATTR_INVITATION_FLAGS); 267 wpabuf_put_le16(buf, 1); 268 wpabuf_put_u8(buf, flags); 269 wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x", flags); 270 } 271 272 273 static void p2p_buf_add_noa_desc(struct wpabuf *buf, struct p2p_noa_desc *desc) 274 { 275 if (desc == NULL) 276 return; 277 278 wpabuf_put_u8(buf, desc->count_type); 279 wpabuf_put_le32(buf, desc->duration); 280 wpabuf_put_le32(buf, desc->interval); 281 wpabuf_put_le32(buf, desc->start_time); 282 } 283 284 285 void p2p_buf_add_noa(struct wpabuf *buf, u8 noa_index, u8 opp_ps, u8 ctwindow, 286 struct p2p_noa_desc *desc1, struct p2p_noa_desc *desc2) 287 { 288 /* Notice of Absence */ 289 wpabuf_put_u8(buf, P2P_ATTR_NOTICE_OF_ABSENCE); 290 wpabuf_put_le16(buf, 2 + (desc1 ? 13 : 0) + (desc2 ? 13 : 0)); 291 wpabuf_put_u8(buf, noa_index); 292 wpabuf_put_u8(buf, (opp_ps ? 0x80 : 0) | (ctwindow & 0x7f)); 293 p2p_buf_add_noa_desc(buf, desc1); 294 p2p_buf_add_noa_desc(buf, desc2); 295 wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence"); 296 } 297 298 299 void p2p_buf_add_ext_listen_timing(struct wpabuf *buf, u16 period, 300 u16 interval) 301 { 302 /* Extended Listen Timing */ 303 wpabuf_put_u8(buf, P2P_ATTR_EXT_LISTEN_TIMING); 304 wpabuf_put_le16(buf, 4); 305 wpabuf_put_le16(buf, period); 306 wpabuf_put_le16(buf, interval); 307 wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing (period %u msec " 308 "interval %u msec)", period, interval); 309 } 310 311 312 void p2p_buf_add_p2p_interface(struct wpabuf *buf, struct p2p_data *p2p) 313 { 314 /* P2P Interface */ 315 wpabuf_put_u8(buf, P2P_ATTR_INTERFACE); 316 wpabuf_put_le16(buf, ETH_ALEN + 1 + ETH_ALEN); 317 /* P2P Device address */ 318 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 319 /* 320 * FIX: Fetch interface address list from driver. Do not include 321 * the P2P Device address if it is never used as interface address. 322 */ 323 /* P2P Interface Address Count */ 324 wpabuf_put_u8(buf, 1); 325 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 326 } 327 328 329 static void p2p_add_wps_string(struct wpabuf *buf, enum wps_attribute attr, 330 const char *val) 331 { 332 size_t len; 333 334 wpabuf_put_be16(buf, attr); 335 len = val ? os_strlen(val) : 0; 336 #ifndef CONFIG_WPS_STRICT 337 if (len == 0) { 338 /* 339 * Some deployed WPS implementations fail to parse zeor-length 340 * attributes. As a workaround, send a space character if the 341 * device attribute string is empty. 342 */ 343 wpabuf_put_be16(buf, 1); 344 wpabuf_put_u8(buf, ' '); 345 return; 346 } 347 #endif /* CONFIG_WPS_STRICT */ 348 wpabuf_put_be16(buf, len); 349 if (val) 350 wpabuf_put_data(buf, val, len); 351 } 352 353 354 void p2p_build_wps_ie(struct p2p_data *p2p, struct wpabuf *buf, int pw_id, 355 int all_attr) 356 { 357 u8 *len; 358 int i; 359 360 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); 361 len = wpabuf_put(buf, 1); 362 wpabuf_put_be32(buf, WPS_DEV_OUI_WFA); 363 364 wps_build_version(buf); 365 366 if (all_attr) { 367 wpabuf_put_be16(buf, ATTR_WPS_STATE); 368 wpabuf_put_be16(buf, 1); 369 wpabuf_put_u8(buf, WPS_STATE_NOT_CONFIGURED); 370 } 371 372 if (pw_id >= 0) { 373 /* Device Password ID */ 374 wpabuf_put_be16(buf, ATTR_DEV_PASSWORD_ID); 375 wpabuf_put_be16(buf, 2); 376 wpa_printf(MSG_DEBUG, "P2P: WPS IE Device Password ID: %d", 377 pw_id); 378 wpabuf_put_be16(buf, pw_id); 379 } 380 381 if (all_attr) { 382 wpabuf_put_be16(buf, ATTR_RESPONSE_TYPE); 383 wpabuf_put_be16(buf, 1); 384 wpabuf_put_u8(buf, WPS_RESP_ENROLLEE_INFO); 385 386 wps_build_uuid_e(buf, p2p->cfg->uuid); 387 p2p_add_wps_string(buf, ATTR_MANUFACTURER, 388 p2p->cfg->manufacturer); 389 p2p_add_wps_string(buf, ATTR_MODEL_NAME, p2p->cfg->model_name); 390 p2p_add_wps_string(buf, ATTR_MODEL_NUMBER, 391 p2p->cfg->model_number); 392 p2p_add_wps_string(buf, ATTR_SERIAL_NUMBER, 393 p2p->cfg->serial_number); 394 395 wpabuf_put_be16(buf, ATTR_PRIMARY_DEV_TYPE); 396 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN); 397 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, WPS_DEV_TYPE_LEN); 398 399 p2p_add_wps_string(buf, ATTR_DEV_NAME, p2p->cfg->dev_name); 400 401 wpabuf_put_be16(buf, ATTR_CONFIG_METHODS); 402 wpabuf_put_be16(buf, 2); 403 wpabuf_put_be16(buf, p2p->cfg->config_methods); 404 } 405 406 wps_build_wfa_ext(buf, 0, NULL, 0); 407 408 if (all_attr && p2p->cfg->num_sec_dev_types) { 409 wpabuf_put_be16(buf, ATTR_SECONDARY_DEV_TYPE_LIST); 410 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN * 411 p2p->cfg->num_sec_dev_types); 412 wpabuf_put_data(buf, p2p->cfg->sec_dev_type, 413 WPS_DEV_TYPE_LEN * 414 p2p->cfg->num_sec_dev_types); 415 } 416 417 /* Add the WPS vendor extensions */ 418 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 419 if (p2p->wps_vendor_ext[i] == NULL) 420 break; 421 if (wpabuf_tailroom(buf) < 422 4 + wpabuf_len(p2p->wps_vendor_ext[i])) 423 continue; 424 wpabuf_put_be16(buf, ATTR_VENDOR_EXT); 425 wpabuf_put_be16(buf, wpabuf_len(p2p->wps_vendor_ext[i])); 426 wpabuf_put_buf(buf, p2p->wps_vendor_ext[i]); 427 } 428 429 p2p_buf_update_ie_hdr(buf, len); 430 } 431
