ieee802_11_ht.c revision 75ecf5267604f166b85a7ee2cf0d9cb682966680
18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * hostapd / IEEE 802.11n HT 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Copyright (c) 2007-2008, Intel Corporation 58d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 68d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * This program is free software; you can redistribute it and/or modify 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * it under the terms of the GNU General Public License version 2 as 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * published by the Free Software Foundation. 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * Alternatively, this software may be distributed under the terms of BSD 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * license. 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * See README and COPYING for more details. 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "utils/includes.h" 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "utils/common.h" 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "common/ieee802_11_defs.h" 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "drivers/driver.h" 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "hostapd.h" 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "ap_config.h" 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "sta_info.h" 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "beacon.h" 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#include "ieee802_11.h" 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtu8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid) 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct ieee80211_ht_capabilities *cap; 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *pos = eid; 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!hapd->iconf->ieee80211n || !hapd->iface->current_mode || 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->conf->disable_11n) 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eid; 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *pos++ = WLAN_EID_HT_CAP; 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *pos++ = sizeof(*cap); 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt cap = (struct ieee80211_ht_capabilities *) pos; 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(cap, 0, sizeof(*cap)); 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt cap->ht_capabilities_info = host_to_le16(hapd->iconf->ht_capab); 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt cap->a_mpdu_params = hapd->iface->current_mode->a_mpdu_params; 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(cap->supported_mcs_set, hapd->iface->current_mode->mcs_set, 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 16); 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: ht_extended_capabilities (now fully disabled) */ 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: tx_bf_capability_info (now fully disabled) */ 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* TODO: asel_capabilities (now fully disabled) */ 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += sizeof(*cap); 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return pos; 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtu8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid) 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct ieee80211_ht_operation *oper; 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 *pos = eid; 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n) 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return eid; 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *pos++ = WLAN_EID_HT_OPERATION; 668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt *pos++ = sizeof(*oper); 678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt oper = (struct ieee80211_ht_operation *) pos; 698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memset(oper, 0, sizeof(*oper)); 708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt oper->control_chan = hapd->iconf->channel; 728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt oper->operation_mode = host_to_le16(hapd->iface->ht_op_mode); 738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (hapd->iconf->secondary_channel == 1) 748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE | 758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH; 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (hapd->iconf->secondary_channel == -1) 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW | 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH; 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt pos += sizeof(*oper); 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return pos; 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtop_mode 888d520ff1dc2da35cdca849e982051b86468016d8Dmitry ShmidtSet to 0 (HT pure) under the followign conditions 898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt - all STAs in the BSS are 20/40 MHz HT in 20/40 MHz BSS or 908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt - all STAs in the BSS are 20 MHz HT in 20 MHz BSS 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry ShmidtSet to 1 (HT non-member protection) if there may be non-HT STAs 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt in both the primary and the secondary channel 938d520ff1dc2da35cdca849e982051b86468016d8Dmitry ShmidtSet to 2 if only HT STAs are associated in BSS, 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt however and at least one 20 MHz HT STA is associated 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry ShmidtSet to 3 (HT mixed mode) when one or more non-HT STAs are associated 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt*/ 978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint hostapd_ht_operation_update(struct hostapd_iface *iface) 988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 cur_op_mode, new_op_mode; 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int op_mode_changes = 0; 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!iface->conf->ieee80211n || iface->conf->ht_op_mode_fixed) 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return 0; 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "%s current operation mode=0x%X", 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt __func__, iface->ht_op_mode); 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT) 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt && iface->num_sta_ht_no_gf) { 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt iface->ht_op_mode |= 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT; 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt op_mode_changes++; 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if ((iface->ht_op_mode & 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT) && 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt iface->num_sta_ht_no_gf == 0) { 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt iface->ht_op_mode &= 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ~HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT; 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt op_mode_changes++; 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) && 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (iface->num_sta_no_ht || iface->olbc_ht)) { 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt iface->ht_op_mode |= HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT; 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt op_mode_changes++; 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } else if ((iface->ht_op_mode & 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) && 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt (iface->num_sta_no_ht == 0 && !iface->olbc_ht)) { 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt iface->ht_op_mode &= 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ~HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT; 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt op_mode_changes++; 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt new_op_mode = 0; 1348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (iface->num_sta_no_ht) 1358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt new_op_mode = OP_MODE_MIXED; 1368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else if ((iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) 1378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt && iface->num_sta_ht_20mhz) 1388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt new_op_mode = OP_MODE_20MHZ_HT_STA_ASSOCED; 1398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else if (iface->olbc_ht) 1408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt new_op_mode = OP_MODE_MAY_BE_LEGACY_STAS; 1418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 1428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt new_op_mode = OP_MODE_PURE; 1438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt cur_op_mode = iface->ht_op_mode & HT_INFO_OPERATION_MODE_OP_MODE_MASK; 1458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (cur_op_mode != new_op_mode) { 1468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt iface->ht_op_mode &= ~HT_INFO_OPERATION_MODE_OP_MODE_MASK; 1478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt iface->ht_op_mode |= new_op_mode; 1488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt op_mode_changes++; 1498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "%s new operation mode=0x%X changes=%d", 1528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt __func__, iface->ht_op_mode, op_mode_changes); 1538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return op_mode_changes; 1558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtu16 copy_sta_ht_capab(struct hostapd_data *hapd, struct sta_info *sta, 1598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const u8 *ht_capab, size_t ht_capab_len) 1608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* Disable HT caps for STAs associated to no-HT BSSes. */ 1628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!ht_capab || 1638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ht_capab_len < sizeof(struct ieee80211_ht_capabilities) || 1648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->conf->disable_11n) { 1658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sta->flags &= ~WLAN_STA_HT; 1668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_free(sta->ht_capabilities); 1678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sta->ht_capabilities = NULL; 1688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WLAN_STATUS_SUCCESS; 1698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sta->ht_capabilities == NULL) { 1728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sta->ht_capabilities = 1738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_zalloc(sizeof(struct ieee80211_ht_capabilities)); 1748d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (sta->ht_capabilities == NULL) 1758d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WLAN_STATUS_UNSPECIFIED_FAILURE; 1768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sta->flags |= WLAN_STA_HT; 1798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(sta->ht_capabilities, ht_capab, 1808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sizeof(struct ieee80211_ht_capabilities)); 1818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return WLAN_STATUS_SUCCESS; 1838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 1848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void update_sta_ht(struct hostapd_data *hapd, struct sta_info *sta) 1878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 1888d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 ht_capab; 1898d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1908d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ht_capab = le_to_host16(sta->ht_capabilities->ht_capabilities_info); 1918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "HT: STA " MACSTR " HT Capabilities Info: " 1928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "0x%04x", MAC2STR(sta->addr), ht_capab); 1938d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0) { 1948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!sta->no_ht_gf_set) { 1958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sta->no_ht_gf_set = 1; 1968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->iface->num_sta_ht_no_gf++; 1978d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 1988d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no greenfield, num " 1998d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "of non-gf stations %d", 2008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt __func__, MAC2STR(sta->addr), 2018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->iface->num_sta_ht_no_gf); 2028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0) { 2048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!sta->ht_20mhz_set) { 2058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sta->ht_20mhz_set = 1; 2068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->iface->num_sta_ht_20mhz++; 2078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - 20 MHz HT, num of " 2098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "20MHz HT STAs %d", 2108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt __func__, MAC2STR(sta->addr), 2118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->iface->num_sta_ht_20mhz); 2128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstatic void update_sta_no_ht(struct hostapd_data *hapd, struct sta_info *sta) 2178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!sta->no_ht_set) { 2198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt sta->no_ht_set = 1; 2208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->iface->num_sta_no_ht++; 2218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (hapd->iconf->ieee80211n) { 2238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no HT, num of " 2248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt "non-HT stations %d", 2258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt __func__, MAC2STR(sta->addr), 2268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt hapd->iface->num_sta_no_ht); 2278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt } 2288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid update_ht_state(struct hostapd_data *hapd, struct sta_info *sta) 2328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if ((sta->flags & WLAN_STA_HT) && sta->ht_capabilities) 2348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt update_sta_ht(hapd, sta); 2358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt else 2368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt update_sta_no_ht(hapd, sta); 2378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (hostapd_ht_operation_update(hapd->iface) > 0) 2398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt ieee802_11_set_beacons(hapd->iface); 2408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 2418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid hostapd_get_ht_capab(struct hostapd_data *hapd, 2448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct ieee80211_ht_capabilities *ht_cap, 2458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct ieee80211_ht_capabilities *neg_ht_cap) 2468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt{ 2478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u16 cap; 2488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (ht_cap == NULL) 2508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt return; 2518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt os_memcpy(neg_ht_cap, ht_cap, sizeof(*neg_ht_cap)); 2528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt cap = le_to_host16(neg_ht_cap->ht_capabilities_info); 25375ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen 25475ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen /* 25575ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen * Mask out HT features we don't support, but don't overwrite 25675ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen * non-symmetric features like STBC and SMPS. Just because 25775ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen * we're not in dynamic SMPS mode the STA might still be. 25875ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen */ 25975ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen cap &= (hapd->iconf->ht_capab | HT_CAP_INFO_RX_STBC_MASK | 26075ecf5267604f166b85a7ee2cf0d9cb682966680Jouni Malinen HT_CAP_INFO_TX_STBC | HT_CAP_INFO_SMPS_MASK); 2618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* 2638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * STBC needs to be handled specially 2648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * if we don't support RX STBC, mask out TX STBC in the STA's HT caps 2658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * if we don't support TX STBC, mask out RX STBC in the STA's HT caps 2668d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 2678d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!(hapd->iconf->ht_capab & HT_CAP_INFO_RX_STBC_MASK)) 2688d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt cap &= ~HT_CAP_INFO_TX_STBC; 2698d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt if (!(hapd->iconf->ht_capab & HT_CAP_INFO_TX_STBC)) 2708d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt cap &= ~HT_CAP_INFO_RX_STBC_MASK; 2718d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 2728d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt neg_ht_cap->ht_capabilities_info = host_to_le16(cap); 2738d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt} 274