+++ /dev/null
-/*
- * hostapd / IEEE 802.11n HT
- * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
- * Copyright (c) 2007-2008, Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
- */
-
-#include "utils/includes.h"
-
-#include "utils/common.h"
-#include "common/ieee802_11_defs.h"
-#include "drivers/driver.h"
-#include "hostapd.h"
-#include "ap_config.h"
-#include "sta_info.h"
-#include "beacon.h"
-#include "ieee802_11.h"
-
-
-u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
-{
- struct ieee80211_ht_capabilities *cap;
- u8 *pos = eid;
-
- if (!hapd->iconf->ieee80211n || !hapd->iface->current_mode)
- return eid;
-
- *pos++ = WLAN_EID_HT_CAP;
- *pos++ = sizeof(*cap);
-
- cap = (struct ieee80211_ht_capabilities *) pos;
- os_memset(cap, 0, sizeof(*cap));
- cap->ht_capabilities_info = host_to_le16(hapd->iconf->ht_capab);
- cap->a_mpdu_params = hapd->iface->current_mode->a_mpdu_params;
- os_memcpy(cap->supported_mcs_set, hapd->iface->current_mode->mcs_set,
- 16);
-
- /* TODO: ht_extended_capabilities (now fully disabled) */
- /* TODO: tx_bf_capability_info (now fully disabled) */
- /* TODO: asel_capabilities (now fully disabled) */
-
- pos += sizeof(*cap);
-
- return pos;
-}
-
-
-u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
-{
- struct ieee80211_ht_operation *oper;
- u8 *pos = eid;
-
- if (!hapd->iconf->ieee80211n)
- return eid;
-
- *pos++ = WLAN_EID_HT_OPERATION;
- *pos++ = sizeof(*oper);
-
- oper = (struct ieee80211_ht_operation *) pos;
- os_memset(oper, 0, sizeof(*oper));
-
- oper->control_chan = hapd->iconf->channel;
- oper->operation_mode = host_to_le16(hapd->iface->ht_op_mode);
- if (hapd->iconf->secondary_channel == 1)
- oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE |
- HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
- if (hapd->iconf->secondary_channel == -1)
- oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW |
- HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
-
- pos += sizeof(*oper);
-
- return pos;
-}
-
-
-/*
-op_mode
-Set to 0 (HT pure) under the followign conditions
- - all STAs in the BSS are 20/40 MHz HT in 20/40 MHz BSS or
- - all STAs in the BSS are 20 MHz HT in 20 MHz BSS
-Set to 1 (HT non-member protection) if there may be non-HT STAs
- in both the primary and the secondary channel
-Set to 2 if only HT STAs are associated in BSS,
- however and at least one 20 MHz HT STA is associated
-Set to 3 (HT mixed mode) when one or more non-HT STAs are associated
- (currently non-GF HT station is considered as non-HT STA also)
-*/
-int hostapd_ht_operation_update(struct hostapd_iface *iface)
-{
- u16 cur_op_mode, new_op_mode;
- int op_mode_changes = 0;
-
- if (!iface->conf->ieee80211n || iface->conf->ht_op_mode_fixed)
- return 0;
-
- wpa_printf(MSG_DEBUG, "%s current operation mode=0x%X",
- __func__, iface->ht_op_mode);
-
- if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT)
- && iface->num_sta_ht_no_gf) {
- iface->ht_op_mode |=
- HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
- op_mode_changes++;
- } else if ((iface->ht_op_mode &
- HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT) &&
- iface->num_sta_ht_no_gf == 0) {
- iface->ht_op_mode &=
- ~HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
- op_mode_changes++;
- }
-
- if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
- (iface->num_sta_no_ht || iface->olbc_ht)) {
- iface->ht_op_mode |= HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
- op_mode_changes++;
- } else if ((iface->ht_op_mode &
- HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
- (iface->num_sta_no_ht == 0 && !iface->olbc_ht)) {
- iface->ht_op_mode &=
- ~HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
- op_mode_changes++;
- }
-
- /* Note: currently we switch to the MIXED op mode if HT non-greenfield
- * station is associated. Probably it's a theoretical case, since
- * it looks like all known HT STAs support greenfield.
- */
- new_op_mode = 0;
- if (iface->num_sta_no_ht ||
- (iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT))
- new_op_mode = OP_MODE_MIXED;
- else if ((iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)
- && iface->num_sta_ht_20mhz)
- new_op_mode = OP_MODE_20MHZ_HT_STA_ASSOCED;
- else if (iface->olbc_ht)
- new_op_mode = OP_MODE_MAY_BE_LEGACY_STAS;
- else
- new_op_mode = OP_MODE_PURE;
-
- cur_op_mode = iface->ht_op_mode & HT_INFO_OPERATION_MODE_OP_MODE_MASK;
- if (cur_op_mode != new_op_mode) {
- iface->ht_op_mode &= ~HT_INFO_OPERATION_MODE_OP_MODE_MASK;
- iface->ht_op_mode |= new_op_mode;
- op_mode_changes++;
- }
-
- wpa_printf(MSG_DEBUG, "%s new operation mode=0x%X changes=%d",
- __func__, iface->ht_op_mode, op_mode_changes);
-
- return op_mode_changes;
-}
-
-
-u16 copy_sta_ht_capab(struct sta_info *sta, const u8 *ht_capab,
- size_t ht_capab_len)
-{
- if (!ht_capab ||
- ht_capab_len < sizeof(struct ieee80211_ht_capabilities)) {
- sta->flags &= ~WLAN_STA_HT;
- os_free(sta->ht_capabilities);
- sta->ht_capabilities = NULL;
- return WLAN_STATUS_SUCCESS;
- }
-
- if (sta->ht_capabilities == NULL) {
- sta->ht_capabilities =
- os_zalloc(sizeof(struct ieee80211_ht_capabilities));
- if (sta->ht_capabilities == NULL)
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
-
- sta->flags |= WLAN_STA_HT;
- os_memcpy(sta->ht_capabilities, ht_capab,
- sizeof(struct ieee80211_ht_capabilities));
-
- return WLAN_STATUS_SUCCESS;
-}
-
-
-static void update_sta_ht(struct hostapd_data *hapd, struct sta_info *sta)
-{
- u16 ht_capab;
-
- ht_capab = le_to_host16(sta->ht_capabilities->ht_capabilities_info);
- wpa_printf(MSG_DEBUG, "HT: STA " MACSTR " HT Capabilities Info: "
- "0x%04x", MAC2STR(sta->addr), ht_capab);
- if ((ht_capab & HT_CAP_INFO_GREEN_FIELD) == 0) {
- if (!sta->no_ht_gf_set) {
- sta->no_ht_gf_set = 1;
- hapd->iface->num_sta_ht_no_gf++;
- }
- wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no greenfield, num "
- "of non-gf stations %d",
- __func__, MAC2STR(sta->addr),
- hapd->iface->num_sta_ht_no_gf);
- }
- if ((ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) == 0) {
- if (!sta->ht_20mhz_set) {
- sta->ht_20mhz_set = 1;
- hapd->iface->num_sta_ht_20mhz++;
- }
- wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - 20 MHz HT, num of "
- "20MHz HT STAs %d",
- __func__, MAC2STR(sta->addr),
- hapd->iface->num_sta_ht_20mhz);
- }
-}
-
-
-static void update_sta_no_ht(struct hostapd_data *hapd, struct sta_info *sta)
-{
- if (!sta->no_ht_set) {
- sta->no_ht_set = 1;
- hapd->iface->num_sta_no_ht++;
- }
- if (hapd->iconf->ieee80211n) {
- wpa_printf(MSG_DEBUG, "%s STA " MACSTR " - no HT, num of "
- "non-HT stations %d",
- __func__, MAC2STR(sta->addr),
- hapd->iface->num_sta_no_ht);
- }
-}
-
-
-void update_ht_state(struct hostapd_data *hapd, struct sta_info *sta)
-{
- if ((sta->flags & WLAN_STA_HT) && sta->ht_capabilities)
- update_sta_ht(hapd, sta);
- else
- update_sta_no_ht(hapd, sta);
-
- if (hostapd_ht_operation_update(hapd->iface) > 0)
- ieee802_11_set_beacons(hapd->iface);
-}
-
-
-void hostapd_get_ht_capab(struct hostapd_data *hapd,
- struct ieee80211_ht_capabilities *ht_cap,
- struct ieee80211_ht_capabilities *neg_ht_cap)
-{
- u16 cap;
-
- if (ht_cap == NULL)
- return;
- os_memcpy(neg_ht_cap, ht_cap, sizeof(*neg_ht_cap));
- cap = le_to_host16(neg_ht_cap->ht_capabilities_info);
- cap &= hapd->iconf->ht_capab;
- cap |= (hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_DISABLED);
-
- /*
- * STBC needs to be handled specially
- * if we don't support RX STBC, mask out TX STBC in the STA's HT caps
- * if we don't support TX STBC, mask out RX STBC in the STA's HT caps
- */
- if (!(hapd->iconf->ht_capab & HT_CAP_INFO_RX_STBC_MASK))
- cap &= ~HT_CAP_INFO_TX_STBC;
- if (!(hapd->iconf->ht_capab & HT_CAP_INFO_TX_STBC))
- cap &= ~HT_CAP_INFO_RX_STBC_MASK;
-
- neg_ht_cap->ht_capabilities_info = host_to_le16(cap);
-}
projects / mech_eap.git / blobdiff