1214501Srpaulo/* 2214501Srpaulo * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response 3214501Srpaulo * Copyright (c) 2002-2004, Instant802 Networks, Inc. 4214501Srpaulo * Copyright (c) 2005-2006, Devicescape Software, Inc. 5252726Srpaulo * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi> 6214501Srpaulo * 7214501Srpaulo * This program is free software; you can redistribute it and/or modify 8214501Srpaulo * it under the terms of the GNU General Public License version 2 as 9214501Srpaulo * published by the Free Software Foundation. 10214501Srpaulo * 11214501Srpaulo * Alternatively, this software may be distributed under the terms of BSD 12214501Srpaulo * license. 13214501Srpaulo * 14214501Srpaulo * See README and COPYING for more details. 15214501Srpaulo */ 16214501Srpaulo 17214501Srpaulo#include "utils/includes.h" 18214501Srpaulo 19214501Srpaulo#ifndef CONFIG_NATIVE_WINDOWS 20214501Srpaulo 21214501Srpaulo#include "utils/common.h" 22214501Srpaulo#include "common/ieee802_11_defs.h" 23214501Srpaulo#include "common/ieee802_11_common.h" 24214501Srpaulo#include "drivers/driver.h" 25252726Srpaulo#include "wps/wps_defs.h" 26252726Srpaulo#include "p2p/p2p.h" 27214501Srpaulo#include "hostapd.h" 28214501Srpaulo#include "ieee802_11.h" 29214501Srpaulo#include "wpa_auth.h" 30214501Srpaulo#include "wmm.h" 31214501Srpaulo#include "ap_config.h" 32214501Srpaulo#include "sta_info.h" 33252726Srpaulo#include "p2p_hostapd.h" 34252726Srpaulo#include "ap_drv_ops.h" 35214501Srpaulo#include "beacon.h" 36252726Srpaulo#include "hs20.h" 37214501Srpaulo 38214501Srpaulo 39252726Srpaulo#ifdef NEED_AP_MLME 40252726Srpaulo 41214501Srpaulostatic u8 ieee802_11_erp_info(struct hostapd_data *hapd) 42214501Srpaulo{ 43214501Srpaulo u8 erp = 0; 44214501Srpaulo 45214501Srpaulo if (hapd->iface->current_mode == NULL || 46214501Srpaulo hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G) 47214501Srpaulo return 0; 48214501Srpaulo 49252726Srpaulo if (hapd->iface->olbc) 50252726Srpaulo erp |= ERP_INFO_USE_PROTECTION; 51252726Srpaulo if (hapd->iface->num_sta_non_erp > 0) { 52252726Srpaulo erp |= ERP_INFO_NON_ERP_PRESENT | 53252726Srpaulo ERP_INFO_USE_PROTECTION; 54214501Srpaulo } 55214501Srpaulo if (hapd->iface->num_sta_no_short_preamble > 0 || 56214501Srpaulo hapd->iconf->preamble == LONG_PREAMBLE) 57214501Srpaulo erp |= ERP_INFO_BARKER_PREAMBLE_MODE; 58214501Srpaulo 59214501Srpaulo return erp; 60214501Srpaulo} 61214501Srpaulo 62214501Srpaulo 63214501Srpaulostatic u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid) 64214501Srpaulo{ 65214501Srpaulo *eid++ = WLAN_EID_DS_PARAMS; 66214501Srpaulo *eid++ = 1; 67214501Srpaulo *eid++ = hapd->iconf->channel; 68214501Srpaulo return eid; 69214501Srpaulo} 70214501Srpaulo 71214501Srpaulo 72214501Srpaulostatic u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid) 73214501Srpaulo{ 74214501Srpaulo if (hapd->iface->current_mode == NULL || 75214501Srpaulo hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G) 76214501Srpaulo return eid; 77214501Srpaulo 78214501Srpaulo /* Set NonERP_present and use_protection bits if there 79214501Srpaulo * are any associated NonERP stations. */ 80214501Srpaulo /* TODO: use_protection bit can be set to zero even if 81214501Srpaulo * there are NonERP stations present. This optimization 82214501Srpaulo * might be useful if NonERP stations are "quiet". 83214501Srpaulo * See 802.11g/D6 E-1 for recommended practice. 84214501Srpaulo * In addition, Non ERP present might be set, if AP detects Non ERP 85214501Srpaulo * operation on other APs. */ 86214501Srpaulo 87214501Srpaulo /* Add ERP Information element */ 88214501Srpaulo *eid++ = WLAN_EID_ERP_INFO; 89214501Srpaulo *eid++ = 1; 90214501Srpaulo *eid++ = ieee802_11_erp_info(hapd); 91214501Srpaulo 92214501Srpaulo return eid; 93214501Srpaulo} 94214501Srpaulo 95214501Srpaulo 96214501Srpaulostatic u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing, 97214501Srpaulo struct hostapd_channel_data *start, 98214501Srpaulo struct hostapd_channel_data *prev) 99214501Srpaulo{ 100214501Srpaulo if (end - pos < 3) 101214501Srpaulo return pos; 102214501Srpaulo 103214501Srpaulo /* first channel number */ 104214501Srpaulo *pos++ = start->chan; 105214501Srpaulo /* number of channels */ 106214501Srpaulo *pos++ = (prev->chan - start->chan) / chan_spacing + 1; 107214501Srpaulo /* maximum transmit power level */ 108214501Srpaulo *pos++ = start->max_tx_power; 109214501Srpaulo 110214501Srpaulo return pos; 111214501Srpaulo} 112214501Srpaulo 113214501Srpaulo 114214501Srpaulostatic u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid, 115214501Srpaulo int max_len) 116214501Srpaulo{ 117214501Srpaulo u8 *pos = eid; 118214501Srpaulo u8 *end = eid + max_len; 119214501Srpaulo int i; 120214501Srpaulo struct hostapd_hw_modes *mode; 121214501Srpaulo struct hostapd_channel_data *start, *prev; 122214501Srpaulo int chan_spacing = 1; 123214501Srpaulo 124214501Srpaulo if (!hapd->iconf->ieee80211d || max_len < 6 || 125214501Srpaulo hapd->iface->current_mode == NULL) 126214501Srpaulo return eid; 127214501Srpaulo 128214501Srpaulo *pos++ = WLAN_EID_COUNTRY; 129214501Srpaulo pos++; /* length will be set later */ 130214501Srpaulo os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */ 131214501Srpaulo pos += 3; 132214501Srpaulo 133214501Srpaulo mode = hapd->iface->current_mode; 134214501Srpaulo if (mode->mode == HOSTAPD_MODE_IEEE80211A) 135214501Srpaulo chan_spacing = 4; 136214501Srpaulo 137214501Srpaulo start = prev = NULL; 138214501Srpaulo for (i = 0; i < mode->num_channels; i++) { 139214501Srpaulo struct hostapd_channel_data *chan = &mode->channels[i]; 140214501Srpaulo if (chan->flag & HOSTAPD_CHAN_DISABLED) 141214501Srpaulo continue; 142214501Srpaulo if (start && prev && 143214501Srpaulo prev->chan + chan_spacing == chan->chan && 144214501Srpaulo start->max_tx_power == chan->max_tx_power) { 145214501Srpaulo prev = chan; 146214501Srpaulo continue; /* can use same entry */ 147214501Srpaulo } 148214501Srpaulo 149214501Srpaulo if (start) { 150214501Srpaulo pos = hostapd_eid_country_add(pos, end, chan_spacing, 151214501Srpaulo start, prev); 152214501Srpaulo start = NULL; 153214501Srpaulo } 154214501Srpaulo 155214501Srpaulo /* Start new group */ 156214501Srpaulo start = prev = chan; 157214501Srpaulo } 158214501Srpaulo 159214501Srpaulo if (start) { 160214501Srpaulo pos = hostapd_eid_country_add(pos, end, chan_spacing, 161214501Srpaulo start, prev); 162214501Srpaulo } 163214501Srpaulo 164214501Srpaulo if ((pos - eid) & 1) { 165214501Srpaulo if (end - pos < 1) 166214501Srpaulo return eid; 167214501Srpaulo *pos++ = 0; /* pad for 16-bit alignment */ 168214501Srpaulo } 169214501Srpaulo 170214501Srpaulo eid[1] = (pos - eid) - 2; 171214501Srpaulo 172214501Srpaulo return pos; 173214501Srpaulo} 174214501Srpaulo 175214501Srpaulo 176252726Srpaulostatic u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len) 177214501Srpaulo{ 178214501Srpaulo const u8 *ie; 179214501Srpaulo size_t ielen; 180214501Srpaulo 181214501Srpaulo ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen); 182214501Srpaulo if (ie == NULL || ielen > len) 183214501Srpaulo return eid; 184214501Srpaulo 185214501Srpaulo os_memcpy(eid, ie, ielen); 186214501Srpaulo return eid + ielen; 187214501Srpaulo} 188214501Srpaulo 189214501Srpaulo 190252726Srpaulostatic u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd, 191252726Srpaulo struct sta_info *sta, 192252726Srpaulo const struct ieee80211_mgmt *req, 193252726Srpaulo int is_p2p, size_t *resp_len) 194214501Srpaulo{ 195214501Srpaulo struct ieee80211_mgmt *resp; 196214501Srpaulo u8 *pos, *epos; 197214501Srpaulo size_t buflen; 198214501Srpaulo 199214501Srpaulo#define MAX_PROBERESP_LEN 768 200214501Srpaulo buflen = MAX_PROBERESP_LEN; 201214501Srpaulo#ifdef CONFIG_WPS 202214501Srpaulo if (hapd->wps_probe_resp_ie) 203214501Srpaulo buflen += wpabuf_len(hapd->wps_probe_resp_ie); 204214501Srpaulo#endif /* CONFIG_WPS */ 205252726Srpaulo#ifdef CONFIG_P2P 206252726Srpaulo if (hapd->p2p_probe_resp_ie) 207252726Srpaulo buflen += wpabuf_len(hapd->p2p_probe_resp_ie); 208252726Srpaulo#endif /* CONFIG_P2P */ 209252726Srpaulo if (hapd->conf->vendor_elements) 210252726Srpaulo buflen += wpabuf_len(hapd->conf->vendor_elements); 211214501Srpaulo resp = os_zalloc(buflen); 212214501Srpaulo if (resp == NULL) 213252726Srpaulo return NULL; 214252726Srpaulo 215214501Srpaulo epos = ((u8 *) resp) + MAX_PROBERESP_LEN; 216214501Srpaulo 217214501Srpaulo resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 218214501Srpaulo WLAN_FC_STYPE_PROBE_RESP); 219252726Srpaulo if (req) 220252726Srpaulo os_memcpy(resp->da, req->sa, ETH_ALEN); 221214501Srpaulo os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN); 222214501Srpaulo 223214501Srpaulo os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN); 224214501Srpaulo resp->u.probe_resp.beacon_int = 225214501Srpaulo host_to_le16(hapd->iconf->beacon_int); 226214501Srpaulo 227214501Srpaulo /* hardware or low-level driver will setup seq_ctrl and timestamp */ 228214501Srpaulo resp->u.probe_resp.capab_info = 229214501Srpaulo host_to_le16(hostapd_own_capab_info(hapd, sta, 1)); 230214501Srpaulo 231214501Srpaulo pos = resp->u.probe_resp.variable; 232214501Srpaulo *pos++ = WLAN_EID_SSID; 233252726Srpaulo *pos++ = hapd->conf->ssid.ssid_len; 234252726Srpaulo os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len); 235252726Srpaulo pos += hapd->conf->ssid.ssid_len; 236214501Srpaulo 237214501Srpaulo /* Supported rates */ 238214501Srpaulo pos = hostapd_eid_supp_rates(hapd, pos); 239214501Srpaulo 240214501Srpaulo /* DS Params */ 241214501Srpaulo pos = hostapd_eid_ds_params(hapd, pos); 242214501Srpaulo 243214501Srpaulo pos = hostapd_eid_country(hapd, pos, epos - pos); 244214501Srpaulo 245214501Srpaulo /* ERP Information element */ 246214501Srpaulo pos = hostapd_eid_erp_info(hapd, pos); 247214501Srpaulo 248214501Srpaulo /* Extended supported rates */ 249214501Srpaulo pos = hostapd_eid_ext_supp_rates(hapd, pos); 250214501Srpaulo 251214501Srpaulo /* RSN, MDIE, WPA */ 252252726Srpaulo pos = hostapd_eid_wpa(hapd, pos, epos - pos); 253214501Srpaulo 254214501Srpaulo#ifdef CONFIG_IEEE80211N 255214501Srpaulo pos = hostapd_eid_ht_capabilities(hapd, pos); 256214501Srpaulo pos = hostapd_eid_ht_operation(hapd, pos); 257214501Srpaulo#endif /* CONFIG_IEEE80211N */ 258214501Srpaulo 259252726Srpaulo pos = hostapd_eid_ext_capab(hapd, pos); 260252726Srpaulo 261252726Srpaulo pos = hostapd_eid_time_adv(hapd, pos); 262252726Srpaulo pos = hostapd_eid_time_zone(hapd, pos); 263252726Srpaulo 264252726Srpaulo pos = hostapd_eid_interworking(hapd, pos); 265252726Srpaulo pos = hostapd_eid_adv_proto(hapd, pos); 266252726Srpaulo pos = hostapd_eid_roaming_consortium(hapd, pos); 267252726Srpaulo 268252726Srpaulo#ifdef CONFIG_IEEE80211AC 269252726Srpaulo pos = hostapd_eid_vht_capabilities(hapd, pos); 270252726Srpaulo pos = hostapd_eid_vht_operation(hapd, pos); 271252726Srpaulo#endif /* CONFIG_IEEE80211AC */ 272252726Srpaulo 273214501Srpaulo /* Wi-Fi Alliance WMM */ 274214501Srpaulo pos = hostapd_eid_wmm(hapd, pos); 275214501Srpaulo 276214501Srpaulo#ifdef CONFIG_WPS 277214501Srpaulo if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) { 278214501Srpaulo os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie), 279214501Srpaulo wpabuf_len(hapd->wps_probe_resp_ie)); 280214501Srpaulo pos += wpabuf_len(hapd->wps_probe_resp_ie); 281214501Srpaulo } 282214501Srpaulo#endif /* CONFIG_WPS */ 283214501Srpaulo 284252726Srpaulo#ifdef CONFIG_P2P 285252726Srpaulo if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p && 286252726Srpaulo hapd->p2p_probe_resp_ie) { 287252726Srpaulo os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie), 288252726Srpaulo wpabuf_len(hapd->p2p_probe_resp_ie)); 289252726Srpaulo pos += wpabuf_len(hapd->p2p_probe_resp_ie); 290252726Srpaulo } 291252726Srpaulo#endif /* CONFIG_P2P */ 292252726Srpaulo#ifdef CONFIG_P2P_MANAGER 293252726Srpaulo if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) == 294252726Srpaulo P2P_MANAGE) 295252726Srpaulo pos = hostapd_eid_p2p_manage(hapd, pos); 296252726Srpaulo#endif /* CONFIG_P2P_MANAGER */ 297252726Srpaulo 298252726Srpaulo#ifdef CONFIG_HS20 299252726Srpaulo pos = hostapd_eid_hs20_indication(hapd, pos); 300252726Srpaulo#endif /* CONFIG_HS20 */ 301252726Srpaulo 302252726Srpaulo if (hapd->conf->vendor_elements) { 303252726Srpaulo os_memcpy(pos, wpabuf_head(hapd->conf->vendor_elements), 304252726Srpaulo wpabuf_len(hapd->conf->vendor_elements)); 305252726Srpaulo pos += wpabuf_len(hapd->conf->vendor_elements); 306252726Srpaulo } 307252726Srpaulo 308252726Srpaulo *resp_len = pos - (u8 *) resp; 309252726Srpaulo return (u8 *) resp; 310252726Srpaulo} 311252726Srpaulo 312252726Srpaulo 313252726Srpauloenum ssid_match_result { 314252726Srpaulo NO_SSID_MATCH, 315252726Srpaulo EXACT_SSID_MATCH, 316252726Srpaulo WILDCARD_SSID_MATCH 317252726Srpaulo}; 318252726Srpaulo 319252726Srpaulostatic enum ssid_match_result ssid_match(struct hostapd_data *hapd, 320252726Srpaulo const u8 *ssid, size_t ssid_len, 321252726Srpaulo const u8 *ssid_list, 322252726Srpaulo size_t ssid_list_len) 323252726Srpaulo{ 324252726Srpaulo const u8 *pos, *end; 325252726Srpaulo int wildcard = 0; 326252726Srpaulo 327252726Srpaulo if (ssid_len == 0) 328252726Srpaulo wildcard = 1; 329252726Srpaulo if (ssid_len == hapd->conf->ssid.ssid_len && 330252726Srpaulo os_memcmp(ssid, hapd->conf->ssid.ssid, ssid_len) == 0) 331252726Srpaulo return EXACT_SSID_MATCH; 332252726Srpaulo 333252726Srpaulo if (ssid_list == NULL) 334252726Srpaulo return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH; 335252726Srpaulo 336252726Srpaulo pos = ssid_list; 337252726Srpaulo end = ssid_list + ssid_list_len; 338252726Srpaulo while (pos + 1 <= end) { 339252726Srpaulo if (pos + 2 + pos[1] > end) 340252726Srpaulo break; 341252726Srpaulo if (pos[1] == 0) 342252726Srpaulo wildcard = 1; 343252726Srpaulo if (pos[1] == hapd->conf->ssid.ssid_len && 344252726Srpaulo os_memcmp(pos + 2, hapd->conf->ssid.ssid, pos[1]) == 0) 345252726Srpaulo return EXACT_SSID_MATCH; 346252726Srpaulo pos += 2 + pos[1]; 347252726Srpaulo } 348252726Srpaulo 349252726Srpaulo return wildcard ? WILDCARD_SSID_MATCH : NO_SSID_MATCH; 350252726Srpaulo} 351252726Srpaulo 352252726Srpaulo 353252726Srpaulovoid handle_probe_req(struct hostapd_data *hapd, 354252726Srpaulo const struct ieee80211_mgmt *mgmt, size_t len, 355252726Srpaulo int ssi_signal) 356252726Srpaulo{ 357252726Srpaulo u8 *resp; 358252726Srpaulo struct ieee802_11_elems elems; 359252726Srpaulo const u8 *ie; 360252726Srpaulo size_t ie_len; 361252726Srpaulo struct sta_info *sta = NULL; 362252726Srpaulo size_t i, resp_len; 363252726Srpaulo int noack; 364252726Srpaulo enum ssid_match_result res; 365252726Srpaulo 366252726Srpaulo ie = mgmt->u.probe_req.variable; 367252726Srpaulo if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req)) 368252726Srpaulo return; 369252726Srpaulo ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req)); 370252726Srpaulo 371252726Srpaulo for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) 372252726Srpaulo if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx, 373252726Srpaulo mgmt->sa, mgmt->da, mgmt->bssid, 374252726Srpaulo ie, ie_len, ssi_signal) > 0) 375252726Srpaulo return; 376252726Srpaulo 377252726Srpaulo if (!hapd->iconf->send_probe_response) 378252726Srpaulo return; 379252726Srpaulo 380252726Srpaulo if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) { 381252726Srpaulo wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR, 382252726Srpaulo MAC2STR(mgmt->sa)); 383252726Srpaulo return; 384252726Srpaulo } 385252726Srpaulo 386252726Srpaulo if ((!elems.ssid || !elems.supp_rates)) { 387252726Srpaulo wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request " 388252726Srpaulo "without SSID or supported rates element", 389252726Srpaulo MAC2STR(mgmt->sa)); 390252726Srpaulo return; 391252726Srpaulo } 392252726Srpaulo 393252726Srpaulo#ifdef CONFIG_P2P 394252726Srpaulo if (hapd->p2p && elems.wps_ie) { 395252726Srpaulo struct wpabuf *wps; 396252726Srpaulo wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA); 397252726Srpaulo if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) { 398252726Srpaulo wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " 399252726Srpaulo "due to mismatch with Requested Device " 400252726Srpaulo "Type"); 401252726Srpaulo wpabuf_free(wps); 402252726Srpaulo return; 403252726Srpaulo } 404252726Srpaulo wpabuf_free(wps); 405252726Srpaulo } 406252726Srpaulo 407252726Srpaulo if (hapd->p2p && elems.p2p) { 408252726Srpaulo struct wpabuf *p2p; 409252726Srpaulo p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE); 410252726Srpaulo if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) { 411252726Srpaulo wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request " 412252726Srpaulo "due to mismatch with Device ID"); 413252726Srpaulo wpabuf_free(p2p); 414252726Srpaulo return; 415252726Srpaulo } 416252726Srpaulo wpabuf_free(p2p); 417252726Srpaulo } 418252726Srpaulo#endif /* CONFIG_P2P */ 419252726Srpaulo 420252726Srpaulo if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0 && 421252726Srpaulo elems.ssid_list_len == 0) { 422252726Srpaulo wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for " 423252726Srpaulo "broadcast SSID ignored", MAC2STR(mgmt->sa)); 424252726Srpaulo return; 425252726Srpaulo } 426252726Srpaulo 427252726Srpaulo sta = ap_get_sta(hapd, mgmt->sa); 428252726Srpaulo 429252726Srpaulo#ifdef CONFIG_P2P 430252726Srpaulo if ((hapd->conf->p2p & P2P_GROUP_OWNER) && 431252726Srpaulo elems.ssid_len == P2P_WILDCARD_SSID_LEN && 432252726Srpaulo os_memcmp(elems.ssid, P2P_WILDCARD_SSID, 433252726Srpaulo P2P_WILDCARD_SSID_LEN) == 0) { 434252726Srpaulo /* Process P2P Wildcard SSID like Wildcard SSID */ 435252726Srpaulo elems.ssid_len = 0; 436252726Srpaulo } 437252726Srpaulo#endif /* CONFIG_P2P */ 438252726Srpaulo 439252726Srpaulo res = ssid_match(hapd, elems.ssid, elems.ssid_len, 440252726Srpaulo elems.ssid_list, elems.ssid_list_len); 441252726Srpaulo if (res != NO_SSID_MATCH) { 442252726Srpaulo if (sta) 443252726Srpaulo sta->ssid_probe = &hapd->conf->ssid; 444252726Srpaulo } else { 445252726Srpaulo if (!(mgmt->da[0] & 0x01)) { 446252726Srpaulo char ssid_txt[33]; 447252726Srpaulo ieee802_11_print_ssid(ssid_txt, elems.ssid, 448252726Srpaulo elems.ssid_len); 449252726Srpaulo wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 450252726Srpaulo " for foreign SSID '%s' (DA " MACSTR ")%s", 451252726Srpaulo MAC2STR(mgmt->sa), ssid_txt, 452252726Srpaulo MAC2STR(mgmt->da), 453252726Srpaulo elems.ssid_list ? " (SSID list)" : ""); 454252726Srpaulo } 455252726Srpaulo return; 456252726Srpaulo } 457252726Srpaulo 458252726Srpaulo#ifdef CONFIG_INTERWORKING 459252726Srpaulo if (elems.interworking && elems.interworking_len >= 1) { 460252726Srpaulo u8 ant = elems.interworking[0] & 0x0f; 461252726Srpaulo if (ant != INTERWORKING_ANT_WILDCARD && 462252726Srpaulo ant != hapd->conf->access_network_type) { 463252726Srpaulo wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 464252726Srpaulo " for mismatching ANT %u ignored", 465252726Srpaulo MAC2STR(mgmt->sa), ant); 466252726Srpaulo return; 467252726Srpaulo } 468252726Srpaulo } 469252726Srpaulo 470252726Srpaulo if (elems.interworking && 471252726Srpaulo (elems.interworking_len == 7 || elems.interworking_len == 9)) { 472252726Srpaulo const u8 *hessid; 473252726Srpaulo if (elems.interworking_len == 7) 474252726Srpaulo hessid = elems.interworking + 1; 475252726Srpaulo else 476252726Srpaulo hessid = elems.interworking + 1 + 2; 477252726Srpaulo if (!is_broadcast_ether_addr(hessid) && 478252726Srpaulo os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) { 479252726Srpaulo wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR 480252726Srpaulo " for mismatching HESSID " MACSTR 481252726Srpaulo " ignored", 482252726Srpaulo MAC2STR(mgmt->sa), MAC2STR(hessid)); 483252726Srpaulo return; 484252726Srpaulo } 485252726Srpaulo } 486252726Srpaulo#endif /* CONFIG_INTERWORKING */ 487252726Srpaulo 488252726Srpaulo /* TODO: verify that supp_rates contains at least one matching rate 489252726Srpaulo * with AP configuration */ 490252726Srpaulo 491252726Srpaulo resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL, 492252726Srpaulo &resp_len); 493252726Srpaulo if (resp == NULL) 494252726Srpaulo return; 495252726Srpaulo 496252726Srpaulo /* 497252726Srpaulo * If this is a broadcast probe request, apply no ack policy to avoid 498252726Srpaulo * excessive retries. 499252726Srpaulo */ 500252726Srpaulo noack = !!(res == WILDCARD_SSID_MATCH && 501252726Srpaulo is_broadcast_ether_addr(mgmt->da)); 502252726Srpaulo 503252726Srpaulo if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0) 504214501Srpaulo perror("handle_probe_req: send"); 505214501Srpaulo 506214501Srpaulo os_free(resp); 507214501Srpaulo 508252726Srpaulo wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s " 509214501Srpaulo "SSID", MAC2STR(mgmt->sa), 510214501Srpaulo elems.ssid_len == 0 ? "broadcast" : "our"); 511214501Srpaulo} 512214501Srpaulo 513214501Srpaulo 514252726Srpaulostatic u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd, 515252726Srpaulo size_t *resp_len) 516252726Srpaulo{ 517252726Srpaulo /* check probe response offloading caps and print warnings */ 518252726Srpaulo if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD)) 519252726Srpaulo return NULL; 520252726Srpaulo 521252726Srpaulo#ifdef CONFIG_WPS 522252726Srpaulo if (hapd->conf->wps_state && hapd->wps_probe_resp_ie && 523252726Srpaulo (!(hapd->iface->probe_resp_offloads & 524252726Srpaulo (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS | 525252726Srpaulo WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2)))) 526252726Srpaulo wpa_printf(MSG_WARNING, "Device is trying to offload WPS " 527252726Srpaulo "Probe Response while not supporting this"); 528252726Srpaulo#endif /* CONFIG_WPS */ 529252726Srpaulo 530252726Srpaulo#ifdef CONFIG_P2P 531252726Srpaulo if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie && 532252726Srpaulo !(hapd->iface->probe_resp_offloads & 533252726Srpaulo WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P)) 534252726Srpaulo wpa_printf(MSG_WARNING, "Device is trying to offload P2P " 535252726Srpaulo "Probe Response while not supporting this"); 536252726Srpaulo#endif /* CONFIG_P2P */ 537252726Srpaulo 538252726Srpaulo if (hapd->conf->interworking && 539252726Srpaulo !(hapd->iface->probe_resp_offloads & 540252726Srpaulo WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING)) 541252726Srpaulo wpa_printf(MSG_WARNING, "Device is trying to offload " 542252726Srpaulo "Interworking Probe Response while not supporting " 543252726Srpaulo "this"); 544252726Srpaulo 545252726Srpaulo /* Generate a Probe Response template for the non-P2P case */ 546252726Srpaulo return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len); 547252726Srpaulo} 548252726Srpaulo 549252726Srpaulo#endif /* NEED_AP_MLME */ 550252726Srpaulo 551252726Srpaulo 552214501Srpaulovoid ieee802_11_set_beacon(struct hostapd_data *hapd) 553214501Srpaulo{ 554252726Srpaulo struct ieee80211_mgmt *head = NULL; 555252726Srpaulo u8 *tail = NULL; 556252726Srpaulo size_t head_len = 0, tail_len = 0; 557252726Srpaulo u8 *resp = NULL; 558252726Srpaulo size_t resp_len = 0; 559252726Srpaulo struct wpa_driver_ap_params params; 560252726Srpaulo struct wpabuf *beacon, *proberesp, *assocresp; 561252726Srpaulo#ifdef NEED_AP_MLME 562214501Srpaulo u16 capab_info; 563252726Srpaulo u8 *pos, *tailpos; 564252726Srpaulo#endif /* NEED_AP_MLME */ 565214501Srpaulo 566252726Srpaulo hapd->beacon_set_done = 1; 567252726Srpaulo 568252726Srpaulo#ifdef NEED_AP_MLME 569252726Srpaulo 570214501Srpaulo#define BEACON_HEAD_BUF_SIZE 256 571214501Srpaulo#define BEACON_TAIL_BUF_SIZE 512 572214501Srpaulo head = os_zalloc(BEACON_HEAD_BUF_SIZE); 573214501Srpaulo tail_len = BEACON_TAIL_BUF_SIZE; 574214501Srpaulo#ifdef CONFIG_WPS 575214501Srpaulo if (hapd->conf->wps_state && hapd->wps_beacon_ie) 576214501Srpaulo tail_len += wpabuf_len(hapd->wps_beacon_ie); 577214501Srpaulo#endif /* CONFIG_WPS */ 578252726Srpaulo#ifdef CONFIG_P2P 579252726Srpaulo if (hapd->p2p_beacon_ie) 580252726Srpaulo tail_len += wpabuf_len(hapd->p2p_beacon_ie); 581252726Srpaulo#endif /* CONFIG_P2P */ 582252726Srpaulo if (hapd->conf->vendor_elements) 583252726Srpaulo tail_len += wpabuf_len(hapd->conf->vendor_elements); 584214501Srpaulo tailpos = tail = os_malloc(tail_len); 585214501Srpaulo if (head == NULL || tail == NULL) { 586214501Srpaulo wpa_printf(MSG_ERROR, "Failed to set beacon data"); 587214501Srpaulo os_free(head); 588214501Srpaulo os_free(tail); 589214501Srpaulo return; 590214501Srpaulo } 591214501Srpaulo 592214501Srpaulo head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 593214501Srpaulo WLAN_FC_STYPE_BEACON); 594214501Srpaulo head->duration = host_to_le16(0); 595214501Srpaulo os_memset(head->da, 0xff, ETH_ALEN); 596214501Srpaulo 597214501Srpaulo os_memcpy(head->sa, hapd->own_addr, ETH_ALEN); 598214501Srpaulo os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN); 599214501Srpaulo head->u.beacon.beacon_int = 600214501Srpaulo host_to_le16(hapd->iconf->beacon_int); 601214501Srpaulo 602214501Srpaulo /* hardware or low-level driver will setup seq_ctrl and timestamp */ 603214501Srpaulo capab_info = hostapd_own_capab_info(hapd, NULL, 0); 604214501Srpaulo head->u.beacon.capab_info = host_to_le16(capab_info); 605214501Srpaulo pos = &head->u.beacon.variable[0]; 606214501Srpaulo 607214501Srpaulo /* SSID */ 608214501Srpaulo *pos++ = WLAN_EID_SSID; 609214501Srpaulo if (hapd->conf->ignore_broadcast_ssid == 2) { 610214501Srpaulo /* clear the data, but keep the correct length of the SSID */ 611214501Srpaulo *pos++ = hapd->conf->ssid.ssid_len; 612214501Srpaulo os_memset(pos, 0, hapd->conf->ssid.ssid_len); 613214501Srpaulo pos += hapd->conf->ssid.ssid_len; 614214501Srpaulo } else if (hapd->conf->ignore_broadcast_ssid) { 615214501Srpaulo *pos++ = 0; /* empty SSID */ 616214501Srpaulo } else { 617214501Srpaulo *pos++ = hapd->conf->ssid.ssid_len; 618214501Srpaulo os_memcpy(pos, hapd->conf->ssid.ssid, 619214501Srpaulo hapd->conf->ssid.ssid_len); 620214501Srpaulo pos += hapd->conf->ssid.ssid_len; 621214501Srpaulo } 622214501Srpaulo 623214501Srpaulo /* Supported rates */ 624214501Srpaulo pos = hostapd_eid_supp_rates(hapd, pos); 625214501Srpaulo 626214501Srpaulo /* DS Params */ 627214501Srpaulo pos = hostapd_eid_ds_params(hapd, pos); 628214501Srpaulo 629214501Srpaulo head_len = pos - (u8 *) head; 630214501Srpaulo 631214501Srpaulo tailpos = hostapd_eid_country(hapd, tailpos, 632214501Srpaulo tail + BEACON_TAIL_BUF_SIZE - tailpos); 633214501Srpaulo 634214501Srpaulo /* ERP Information element */ 635214501Srpaulo tailpos = hostapd_eid_erp_info(hapd, tailpos); 636214501Srpaulo 637214501Srpaulo /* Extended supported rates */ 638214501Srpaulo tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos); 639214501Srpaulo 640214501Srpaulo /* RSN, MDIE, WPA */ 641214501Srpaulo tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE - 642252726Srpaulo tailpos); 643214501Srpaulo 644214501Srpaulo#ifdef CONFIG_IEEE80211N 645214501Srpaulo tailpos = hostapd_eid_ht_capabilities(hapd, tailpos); 646214501Srpaulo tailpos = hostapd_eid_ht_operation(hapd, tailpos); 647214501Srpaulo#endif /* CONFIG_IEEE80211N */ 648214501Srpaulo 649252726Srpaulo tailpos = hostapd_eid_ext_capab(hapd, tailpos); 650252726Srpaulo 651252726Srpaulo /* 652252726Srpaulo * TODO: Time Advertisement element should only be included in some 653252726Srpaulo * DTIM Beacon frames. 654252726Srpaulo */ 655252726Srpaulo tailpos = hostapd_eid_time_adv(hapd, tailpos); 656252726Srpaulo 657252726Srpaulo tailpos = hostapd_eid_interworking(hapd, tailpos); 658252726Srpaulo tailpos = hostapd_eid_adv_proto(hapd, tailpos); 659252726Srpaulo tailpos = hostapd_eid_roaming_consortium(hapd, tailpos); 660252726Srpaulo 661252726Srpaulo#ifdef CONFIG_IEEE80211AC 662252726Srpaulo tailpos = hostapd_eid_vht_capabilities(hapd, tailpos); 663252726Srpaulo tailpos = hostapd_eid_vht_operation(hapd, tailpos); 664252726Srpaulo#endif /* CONFIG_IEEE80211AC */ 665252726Srpaulo 666214501Srpaulo /* Wi-Fi Alliance WMM */ 667214501Srpaulo tailpos = hostapd_eid_wmm(hapd, tailpos); 668214501Srpaulo 669214501Srpaulo#ifdef CONFIG_WPS 670214501Srpaulo if (hapd->conf->wps_state && hapd->wps_beacon_ie) { 671214501Srpaulo os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie), 672214501Srpaulo wpabuf_len(hapd->wps_beacon_ie)); 673214501Srpaulo tailpos += wpabuf_len(hapd->wps_beacon_ie); 674214501Srpaulo } 675214501Srpaulo#endif /* CONFIG_WPS */ 676214501Srpaulo 677252726Srpaulo#ifdef CONFIG_P2P 678252726Srpaulo if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) { 679252726Srpaulo os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie), 680252726Srpaulo wpabuf_len(hapd->p2p_beacon_ie)); 681252726Srpaulo tailpos += wpabuf_len(hapd->p2p_beacon_ie); 682252726Srpaulo } 683252726Srpaulo#endif /* CONFIG_P2P */ 684252726Srpaulo#ifdef CONFIG_P2P_MANAGER 685252726Srpaulo if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) == 686252726Srpaulo P2P_MANAGE) 687252726Srpaulo tailpos = hostapd_eid_p2p_manage(hapd, tailpos); 688252726Srpaulo#endif /* CONFIG_P2P_MANAGER */ 689252726Srpaulo 690252726Srpaulo#ifdef CONFIG_HS20 691252726Srpaulo tailpos = hostapd_eid_hs20_indication(hapd, tailpos); 692252726Srpaulo#endif /* CONFIG_HS20 */ 693252726Srpaulo 694252726Srpaulo if (hapd->conf->vendor_elements) { 695252726Srpaulo os_memcpy(tailpos, wpabuf_head(hapd->conf->vendor_elements), 696252726Srpaulo wpabuf_len(hapd->conf->vendor_elements)); 697252726Srpaulo tailpos += wpabuf_len(hapd->conf->vendor_elements); 698252726Srpaulo } 699252726Srpaulo 700214501Srpaulo tail_len = tailpos > tail ? tailpos - tail : 0; 701214501Srpaulo 702252726Srpaulo resp = hostapd_probe_resp_offloads(hapd, &resp_len); 703252726Srpaulo#endif /* NEED_AP_MLME */ 704214501Srpaulo 705252726Srpaulo os_memset(¶ms, 0, sizeof(params)); 706252726Srpaulo params.head = (u8 *) head; 707252726Srpaulo params.head_len = head_len; 708252726Srpaulo params.tail = tail; 709252726Srpaulo params.tail_len = tail_len; 710252726Srpaulo params.proberesp = resp; 711252726Srpaulo params.proberesp_len = resp_len; 712252726Srpaulo params.dtim_period = hapd->conf->dtim_period; 713252726Srpaulo params.beacon_int = hapd->iconf->beacon_int; 714252726Srpaulo params.basic_rates = hapd->iface->basic_rates; 715252726Srpaulo params.ssid = hapd->conf->ssid.ssid; 716252726Srpaulo params.ssid_len = hapd->conf->ssid.ssid_len; 717252726Srpaulo params.pairwise_ciphers = hapd->conf->rsn_pairwise ? 718252726Srpaulo hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise; 719252726Srpaulo params.group_cipher = hapd->conf->wpa_group; 720252726Srpaulo params.key_mgmt_suites = hapd->conf->wpa_key_mgmt; 721252726Srpaulo params.auth_algs = hapd->conf->auth_algs; 722252726Srpaulo params.wpa_version = hapd->conf->wpa; 723252726Srpaulo params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa || 724252726Srpaulo (hapd->conf->ieee802_1x && 725252726Srpaulo (hapd->conf->default_wep_key_len || 726252726Srpaulo hapd->conf->individual_wep_key_len)); 727252726Srpaulo switch (hapd->conf->ignore_broadcast_ssid) { 728252726Srpaulo case 0: 729252726Srpaulo params.hide_ssid = NO_SSID_HIDING; 730252726Srpaulo break; 731252726Srpaulo case 1: 732252726Srpaulo params.hide_ssid = HIDDEN_SSID_ZERO_LEN; 733252726Srpaulo break; 734252726Srpaulo case 2: 735252726Srpaulo params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS; 736252726Srpaulo break; 737252726Srpaulo } 738252726Srpaulo hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp); 739252726Srpaulo params.beacon_ies = beacon; 740252726Srpaulo params.proberesp_ies = proberesp; 741252726Srpaulo params.assocresp_ies = assocresp; 742252726Srpaulo params.isolate = hapd->conf->isolate; 743252726Srpaulo#ifdef NEED_AP_MLME 744252726Srpaulo params.cts_protect = !!(ieee802_11_erp_info(hapd) & 745252726Srpaulo ERP_INFO_USE_PROTECTION); 746252726Srpaulo params.preamble = hapd->iface->num_sta_no_short_preamble == 0 && 747252726Srpaulo hapd->iconf->preamble == SHORT_PREAMBLE; 748252726Srpaulo if (hapd->iface->current_mode && 749252726Srpaulo hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G) 750252726Srpaulo params.short_slot_time = 751252726Srpaulo hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1; 752252726Srpaulo else 753252726Srpaulo params.short_slot_time = -1; 754252726Srpaulo if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n) 755252726Srpaulo params.ht_opmode = -1; 756252726Srpaulo else 757252726Srpaulo params.ht_opmode = hapd->iface->ht_op_mode; 758252726Srpaulo#endif /* NEED_AP_MLME */ 759252726Srpaulo params.interworking = hapd->conf->interworking; 760252726Srpaulo if (hapd->conf->interworking && 761252726Srpaulo !is_zero_ether_addr(hapd->conf->hessid)) 762252726Srpaulo params.hessid = hapd->conf->hessid; 763252726Srpaulo params.access_network_type = hapd->conf->access_network_type; 764252726Srpaulo params.ap_max_inactivity = hapd->conf->ap_max_inactivity; 765252726Srpaulo#ifdef CONFIG_HS20 766252726Srpaulo params.disable_dgaf = hapd->conf->disable_dgaf; 767252726Srpaulo#endif /* CONFIG_HS20 */ 768252726Srpaulo if (hostapd_drv_set_ap(hapd, ¶ms)) 769252726Srpaulo wpa_printf(MSG_ERROR, "Failed to set beacon parameters"); 770252726Srpaulo hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp); 771252726Srpaulo 772214501Srpaulo os_free(tail); 773214501Srpaulo os_free(head); 774252726Srpaulo os_free(resp); 775214501Srpaulo} 776214501Srpaulo 777214501Srpaulo 778214501Srpaulovoid ieee802_11_set_beacons(struct hostapd_iface *iface) 779214501Srpaulo{ 780214501Srpaulo size_t i; 781214501Srpaulo for (i = 0; i < iface->num_bss; i++) 782214501Srpaulo ieee802_11_set_beacon(iface->bss[i]); 783214501Srpaulo} 784214501Srpaulo 785252726Srpaulo 786252726Srpaulo/* only update beacons if started */ 787252726Srpaulovoid ieee802_11_update_beacons(struct hostapd_iface *iface) 788252726Srpaulo{ 789252726Srpaulo size_t i; 790252726Srpaulo for (i = 0; i < iface->num_bss; i++) 791252726Srpaulo if (iface->bss[i]->beacon_set_done) 792252726Srpaulo ieee802_11_set_beacon(iface->bss[i]); 793252726Srpaulo} 794252726Srpaulo 795214501Srpaulo#endif /* CONFIG_NATIVE_WINDOWS */ 796