p2p_build.c revision 8d520ff1dc2da35cdca849e982051b86468016d8
1/* 2 * P2P - IE builder 3 * Copyright (c) 2009-2010, Atheros Communications 4 * 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. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15#include "includes.h" 16 17#include "common.h" 18#include "common/ieee802_11_defs.h" 19#include "wps/wps_i.h" 20#include "p2p_i.h" 21 22 23void p2p_buf_add_action_hdr(struct wpabuf *buf, u8 subtype, u8 dialog_token) 24{ 25 wpabuf_put_u8(buf, WLAN_ACTION_VENDOR_SPECIFIC); 26 wpabuf_put_be24(buf, OUI_WFA); 27 wpabuf_put_u8(buf, P2P_OUI_TYPE); 28 29 wpabuf_put_u8(buf, subtype); /* OUI Subtype */ 30 wpabuf_put_u8(buf, dialog_token); 31 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token); 32} 33 34 35void p2p_buf_add_public_action_hdr(struct wpabuf *buf, u8 subtype, 36 u8 dialog_token) 37{ 38 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); 39 wpabuf_put_u8(buf, WLAN_PA_VENDOR_SPECIFIC); 40 wpabuf_put_be24(buf, OUI_WFA); 41 wpabuf_put_u8(buf, P2P_OUI_TYPE); 42 43 wpabuf_put_u8(buf, subtype); /* OUI Subtype */ 44 wpabuf_put_u8(buf, dialog_token); 45 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token); 46} 47 48 49u8 * p2p_buf_add_ie_hdr(struct wpabuf *buf) 50{ 51 u8 *len; 52 53 /* P2P IE header */ 54 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); 55 len = wpabuf_put(buf, 1); /* IE length to be filled */ 56 wpabuf_put_be24(buf, OUI_WFA); 57 wpabuf_put_u8(buf, P2P_OUI_TYPE); 58 wpa_printf(MSG_DEBUG, "P2P: * P2P IE header"); 59 return len; 60} 61 62 63void p2p_buf_update_ie_hdr(struct wpabuf *buf, u8 *len) 64{ 65 /* Update P2P IE Length */ 66 *len = (u8 *) wpabuf_put(buf, 0) - len - 1; 67} 68 69 70void p2p_buf_add_capability(struct wpabuf *buf, u8 dev_capab, u8 group_capab) 71{ 72 /* P2P Capability */ 73 wpabuf_put_u8(buf, P2P_ATTR_CAPABILITY); 74 wpabuf_put_le16(buf, 2); 75 wpabuf_put_u8(buf, dev_capab); /* Device Capabilities */ 76 wpabuf_put_u8(buf, group_capab); /* Group Capabilities */ 77 wpa_printf(MSG_DEBUG, "P2P: * Capability dev=%02x group=%02x", 78 dev_capab, group_capab); 79} 80 81 82void p2p_buf_add_go_intent(struct wpabuf *buf, u8 go_intent) 83{ 84 /* Group Owner Intent */ 85 wpabuf_put_u8(buf, P2P_ATTR_GROUP_OWNER_INTENT); 86 wpabuf_put_le16(buf, 1); 87 wpabuf_put_u8(buf, go_intent); 88 wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u Tie breaker %u", 89 go_intent >> 1, go_intent & 0x01); 90} 91 92 93void p2p_buf_add_listen_channel(struct wpabuf *buf, const char *country, 94 u8 reg_class, u8 channel) 95{ 96 /* Listen Channel */ 97 wpabuf_put_u8(buf, P2P_ATTR_LISTEN_CHANNEL); 98 wpabuf_put_le16(buf, 5); 99 wpabuf_put_data(buf, country, 3); 100 wpabuf_put_u8(buf, reg_class); /* Regulatory Class */ 101 wpabuf_put_u8(buf, channel); /* Channel Number */ 102 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Regulatory Class %u " 103 "Channel %u", reg_class, channel); 104} 105 106 107void p2p_buf_add_operating_channel(struct wpabuf *buf, const char *country, 108 u8 reg_class, u8 channel) 109{ 110 /* Operating Channel */ 111 wpabuf_put_u8(buf, P2P_ATTR_OPERATING_CHANNEL); 112 wpabuf_put_le16(buf, 5); 113 wpabuf_put_data(buf, country, 3); 114 wpabuf_put_u8(buf, reg_class); /* Regulatory Class */ 115 wpabuf_put_u8(buf, channel); /* Channel Number */ 116 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: Regulatory Class %u " 117 "Channel %u", reg_class, channel); 118} 119 120 121void p2p_buf_add_channel_list(struct wpabuf *buf, const char *country, 122 struct p2p_channels *chan) 123{ 124 u8 *len; 125 size_t i; 126 127 /* Channel List */ 128 wpabuf_put_u8(buf, P2P_ATTR_CHANNEL_LIST); 129 len = wpabuf_put(buf, 2); /* IE length to be filled */ 130 wpabuf_put_data(buf, country, 3); /* Country String */ 131 132 for (i = 0; i < chan->reg_classes; i++) { 133 struct p2p_reg_class *c = &chan->reg_class[i]; 134 wpabuf_put_u8(buf, c->reg_class); 135 wpabuf_put_u8(buf, c->channels); 136 wpabuf_put_data(buf, c->channel, c->channels); 137 } 138 139 /* Update attribute length */ 140 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2); 141 wpa_printf(MSG_DEBUG, "P2P: * Channel List"); 142} 143 144 145void p2p_buf_add_status(struct wpabuf *buf, u8 status) 146{ 147 /* Status */ 148 wpabuf_put_u8(buf, P2P_ATTR_STATUS); 149 wpabuf_put_le16(buf, 1); 150 wpabuf_put_u8(buf, status); 151 wpa_printf(MSG_DEBUG, "P2P: * Status: %d", status); 152} 153 154 155void p2p_buf_add_device_info(struct wpabuf *buf, struct p2p_data *p2p, 156 struct p2p_device *peer) 157{ 158 u8 *len; 159 u16 methods; 160 size_t nlen, i; 161 162 /* P2P Device Info */ 163 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_INFO); 164 len = wpabuf_put(buf, 2); /* IE length to be filled */ 165 166 /* P2P Device address */ 167 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 168 169 /* Config Methods */ 170 methods = 0; 171 if (peer && peer->wps_method != WPS_NOT_READY) { 172 if (peer->wps_method == WPS_PBC) 173 methods |= WPS_CONFIG_PUSHBUTTON; 174 else if (peer->wps_method == WPS_PIN_LABEL) 175 methods |= WPS_CONFIG_LABEL; 176 else if (peer->wps_method == WPS_PIN_DISPLAY || 177 peer->wps_method == WPS_PIN_KEYPAD) 178 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 179 } else { 180 methods |= WPS_CONFIG_PUSHBUTTON; 181 methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD; 182 } 183 wpabuf_put_be16(buf, methods); 184 185 /* Primary Device Type */ 186 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, 187 sizeof(p2p->cfg->pri_dev_type)); 188 189 /* Number of Secondary Device Types */ 190 wpabuf_put_u8(buf, p2p->cfg->num_sec_dev_types); 191 192 /* Secondary Device Type List */ 193 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 194 wpabuf_put_data(buf, p2p->cfg->sec_dev_type[i], 195 WPS_DEV_TYPE_LEN); 196 197 /* Device Name */ 198 nlen = p2p->cfg->dev_name ? os_strlen(p2p->cfg->dev_name) : 0; 199 wpabuf_put_be16(buf, ATTR_DEV_NAME); 200 wpabuf_put_be16(buf, nlen); 201 wpabuf_put_data(buf, p2p->cfg->dev_name, nlen); 202 203 /* Update attribute length */ 204 WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2); 205 wpa_printf(MSG_DEBUG, "P2P: * Device Info"); 206} 207 208 209void p2p_buf_add_device_id(struct wpabuf *buf, const u8 *dev_addr) 210{ 211 /* P2P Device ID */ 212 wpabuf_put_u8(buf, P2P_ATTR_DEVICE_ID); 213 wpabuf_put_le16(buf, ETH_ALEN); 214 wpabuf_put_data(buf, dev_addr, ETH_ALEN); 215 wpa_printf(MSG_DEBUG, "P2P: * Device ID: " MACSTR, MAC2STR(dev_addr)); 216} 217 218 219void p2p_buf_add_config_timeout(struct wpabuf *buf, u8 go_timeout, 220 u8 client_timeout) 221{ 222 /* Configuration Timeout */ 223 wpabuf_put_u8(buf, P2P_ATTR_CONFIGURATION_TIMEOUT); 224 wpabuf_put_le16(buf, 2); 225 wpabuf_put_u8(buf, go_timeout); 226 wpabuf_put_u8(buf, client_timeout); 227 wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout: GO %d (*10ms) " 228 "client %d (*10ms)", go_timeout, client_timeout); 229} 230 231 232void p2p_buf_add_intended_addr(struct wpabuf *buf, const u8 *interface_addr) 233{ 234 /* Intended P2P Interface Address */ 235 wpabuf_put_u8(buf, P2P_ATTR_INTENDED_INTERFACE_ADDR); 236 wpabuf_put_le16(buf, ETH_ALEN); 237 wpabuf_put_data(buf, interface_addr, ETH_ALEN); 238 wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address " MACSTR, 239 MAC2STR(interface_addr)); 240} 241 242 243void p2p_buf_add_group_bssid(struct wpabuf *buf, const u8 *bssid) 244{ 245 /* P2P Group BSSID */ 246 wpabuf_put_u8(buf, P2P_ATTR_GROUP_BSSID); 247 wpabuf_put_le16(buf, ETH_ALEN); 248 wpabuf_put_data(buf, bssid, ETH_ALEN); 249 wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID " MACSTR, 250 MAC2STR(bssid)); 251} 252 253 254void p2p_buf_add_group_id(struct wpabuf *buf, const u8 *dev_addr, 255 const u8 *ssid, size_t ssid_len) 256{ 257 /* P2P Group ID */ 258 wpabuf_put_u8(buf, P2P_ATTR_GROUP_ID); 259 wpabuf_put_le16(buf, ETH_ALEN + ssid_len); 260 wpabuf_put_data(buf, dev_addr, ETH_ALEN); 261 wpabuf_put_data(buf, ssid, ssid_len); 262 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR, 263 MAC2STR(dev_addr)); 264} 265 266 267void p2p_buf_add_invitation_flags(struct wpabuf *buf, u8 flags) 268{ 269 /* Invitation Flags */ 270 wpabuf_put_u8(buf, P2P_ATTR_INVITATION_FLAGS); 271 wpabuf_put_le16(buf, 1); 272 wpabuf_put_u8(buf, flags); 273 wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x", flags); 274} 275 276 277static void p2p_buf_add_noa_desc(struct wpabuf *buf, struct p2p_noa_desc *desc) 278{ 279 if (desc == NULL) 280 return; 281 282 wpabuf_put_u8(buf, desc->count_type); 283 wpabuf_put_le32(buf, desc->duration); 284 wpabuf_put_le32(buf, desc->interval); 285 wpabuf_put_le32(buf, desc->start_time); 286} 287 288 289void p2p_buf_add_noa(struct wpabuf *buf, u8 noa_index, u8 opp_ps, u8 ctwindow, 290 struct p2p_noa_desc *desc1, struct p2p_noa_desc *desc2) 291{ 292 /* Notice of Absence */ 293 wpabuf_put_u8(buf, P2P_ATTR_NOTICE_OF_ABSENCE); 294 wpabuf_put_le16(buf, 2 + (desc1 ? 13 : 0) + (desc2 ? 13 : 0)); 295 wpabuf_put_u8(buf, noa_index); 296 wpabuf_put_u8(buf, (opp_ps ? 0x80 : 0) | (ctwindow & 0x7f)); 297 p2p_buf_add_noa_desc(buf, desc1); 298 p2p_buf_add_noa_desc(buf, desc2); 299 wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence"); 300} 301 302 303void p2p_buf_add_ext_listen_timing(struct wpabuf *buf, u16 period, 304 u16 interval) 305{ 306 /* Extended Listen Timing */ 307 wpabuf_put_u8(buf, P2P_ATTR_EXT_LISTEN_TIMING); 308 wpabuf_put_le16(buf, 4); 309 wpabuf_put_le16(buf, period); 310 wpabuf_put_le16(buf, interval); 311 wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing (period %u msec " 312 "interval %u msec)", period, interval); 313} 314 315 316void p2p_buf_add_p2p_interface(struct wpabuf *buf, struct p2p_data *p2p) 317{ 318 /* P2P Interface */ 319 wpabuf_put_u8(buf, P2P_ATTR_INTERFACE); 320 wpabuf_put_le16(buf, ETH_ALEN + 1 + ETH_ALEN); 321 /* P2P Device address */ 322 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 323 /* 324 * FIX: Fetch interface address list from driver. Do not include 325 * the P2P Device address if it is never used as interface address. 326 */ 327 /* P2P Interface Address Count */ 328 wpabuf_put_u8(buf, 1); 329 wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN); 330} 331 332 333static void p2p_add_wps_string(struct wpabuf *buf, enum wps_attribute attr, 334 const char *val) 335{ 336 size_t len; 337 338 wpabuf_put_be16(buf, attr); 339 len = val ? os_strlen(val) : 0; 340#ifndef CONFIG_WPS_STRICT 341 if (len == 0) { 342 /* 343 * Some deployed WPS implementations fail to parse zeor-length 344 * attributes. As a workaround, send a space character if the 345 * device attribute string is empty. 346 */ 347 wpabuf_put_be16(buf, 1); 348 wpabuf_put_u8(buf, ' '); 349 return; 350 } 351#endif /* CONFIG_WPS_STRICT */ 352 wpabuf_put_be16(buf, len); 353 if (val) 354 wpabuf_put_data(buf, val, len); 355} 356 357 358void p2p_build_wps_ie(struct p2p_data *p2p, struct wpabuf *buf, u16 pw_id, 359 int all_attr) 360{ 361 u8 *len; 362 int i; 363 364 wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); 365 len = wpabuf_put(buf, 1); 366 wpabuf_put_be32(buf, WPS_DEV_OUI_WFA); 367 368 wps_build_version(buf); 369 370 if (all_attr) { 371 wpabuf_put_be16(buf, ATTR_WPS_STATE); 372 wpabuf_put_be16(buf, 1); 373 wpabuf_put_u8(buf, WPS_STATE_NOT_CONFIGURED); 374 } 375 376 /* Device Password ID */ 377 wpabuf_put_be16(buf, ATTR_DEV_PASSWORD_ID); 378 wpabuf_put_be16(buf, 2); 379 wpa_printf(MSG_DEBUG, "P2P: WPS IE Device Password ID: %d", pw_id); 380 wpabuf_put_be16(buf, pw_id); 381 382 if (all_attr) { 383 wpabuf_put_be16(buf, ATTR_RESPONSE_TYPE); 384 wpabuf_put_be16(buf, 1); 385 wpabuf_put_u8(buf, WPS_RESP_ENROLLEE_INFO); 386 387 wps_build_uuid_e(buf, p2p->cfg->uuid); 388 p2p_add_wps_string(buf, ATTR_MANUFACTURER, 389 p2p->cfg->manufacturer); 390 p2p_add_wps_string(buf, ATTR_MODEL_NAME, p2p->cfg->model_name); 391 p2p_add_wps_string(buf, ATTR_MODEL_NUMBER, 392 p2p->cfg->model_number); 393 p2p_add_wps_string(buf, ATTR_SERIAL_NUMBER, 394 p2p->cfg->serial_number); 395 396 wpabuf_put_be16(buf, ATTR_PRIMARY_DEV_TYPE); 397 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN); 398 wpabuf_put_data(buf, p2p->cfg->pri_dev_type, WPS_DEV_TYPE_LEN); 399 400 p2p_add_wps_string(buf, ATTR_DEV_NAME, p2p->cfg->dev_name); 401 402 wpabuf_put_be16(buf, ATTR_CONFIG_METHODS); 403 wpabuf_put_be16(buf, 2); 404 wpabuf_put_be16(buf, p2p->cfg->config_methods); 405 } 406 407 wps_build_wfa_ext(buf, 0, NULL, 0); 408 409 if (all_attr && p2p->cfg->num_sec_dev_types) { 410 wpabuf_put_be16(buf, ATTR_SECONDARY_DEV_TYPE_LIST); 411 wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN * 412 p2p->cfg->num_sec_dev_types); 413 wpabuf_put_data(buf, p2p->cfg->sec_dev_type, 414 WPS_DEV_TYPE_LEN * 415 p2p->cfg->num_sec_dev_types); 416 } 417 418 /* Add the WPS vendor extensions */ 419 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 420 if (p2p->wps_vendor_ext[i] == NULL) 421 break; 422 if (wpabuf_tailroom(buf) < 423 4 + wpabuf_len(p2p->wps_vendor_ext[i])) 424 continue; 425 wpabuf_put_be16(buf, ATTR_VENDOR_EXT); 426 wpabuf_put_be16(buf, wpabuf_len(p2p->wps_vendor_ext[i])); 427 wpabuf_put_buf(buf, p2p->wps_vendor_ext[i]); 428 } 429 430 p2p_buf_update_ie_hdr(buf, len); 431} 432