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Move IEEE 802.11n HT management code into a separate file

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This commit is contained in:
Jouni Malinen 2009-12-06 19:41:47 +02:00
parent eb53b752df
commit d45354be53
8 changed files with 288 additions and 292 deletions
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3
hostapd/Makefile
View File

@ -668,6 +668,9 @@ endif
ifdef NEED_AP_MLME ifdef NEED_AP_MLME
OBJS += beacon.o wme.o ap_list.o ieee802_11.o OBJS += beacon.o wme.o ap_list.o ieee802_11.o
OBJS += hw_features.o OBJS += hw_features.o
ifdef CONFIG_IEEE80211N
OBJS += ieee802_11_ht.o
endif
CFLAGS += -DNEED_AP_MLME CFLAGS += -DNEED_AP_MLME
endif endif

1
hostapd/ap_list.c
View File

@ -3,7 +3,6 @@
* Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi> * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
* Copyright (c) 2003-2004, Instant802 Networks, Inc. * Copyright (c) 2003-2004, Instant802 Networks, Inc.
* Copyright (c) 2006, Devicescape Software, Inc. * Copyright (c) 2006, Devicescape Software, Inc.
* Copyright (c) 2007-2008, Intel Corporation
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as

3
hostapd/beacon.c
View File

@ -3,7 +3,6 @@
* Copyright (c) 2002-2004, Instant802 Networks, Inc. * Copyright (c) 2002-2004, Instant802 Networks, Inc.
* Copyright (c) 2005-2006, Devicescape Software, Inc. * Copyright (c) 2005-2006, Devicescape Software, Inc.
* Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi> * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
* Copyright (c) 2007-2008, Intel Corporation
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as
@ -302,8 +301,10 @@ void handle_probe_req(struct hostapd_data *hapd, struct ieee80211_mgmt *mgmt,
/* Wi-Fi Alliance WMM */ /* Wi-Fi Alliance WMM */
pos = hostapd_eid_wmm(hapd, pos); pos = hostapd_eid_wmm(hapd, pos);
#ifdef CONFIG_IEEE80211N
pos = hostapd_eid_ht_capabilities(hapd, pos); pos = hostapd_eid_ht_capabilities(hapd, pos);
pos = hostapd_eid_ht_operation(hapd, pos); pos = hostapd_eid_ht_operation(hapd, pos);
#endif /* CONFIG_IEEE80211N */
#ifdef CONFIG_WPS #ifdef CONFIG_WPS
if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) { if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {

2
hostapd/hostapd.h
View File

@ -1,8 +1,6 @@
/* /*
* hostapd / Initialization and configuration * hostapd / Initialization and configuration
* Host AP kernel driver
* Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi> * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
* Copyright (c) 2007-2008, Intel Corporation
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as

293
hostapd/ieee802_11.c
View File

@ -1,7 +1,6 @@
/* /*
* hostapd / IEEE 802.11 Management * hostapd / IEEE 802.11 Management
* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> * 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 * 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 * it under the terms of the GNU General Public License version 2 as
@ -103,153 +102,6 @@ u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
} }
u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
{
#ifdef CONFIG_IEEE80211N
struct ieee80211_ht_capabilities *cap;
u8 *pos = eid;
if (!hapd->iconf->ieee80211n)
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;
#else /* CONFIG_IEEE80211N */
return eid;
#endif /* CONFIG_IEEE80211N */
}
u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
{
#ifdef CONFIG_IEEE80211N
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;
#else /* CONFIG_IEEE80211N */
return eid;
#endif /* CONFIG_IEEE80211N */
}
#ifdef CONFIG_IEEE80211N
/*
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;
}
#endif /* CONFIG_IEEE80211N */
u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta, u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
int probe) int probe)
{ {
@ -783,106 +635,6 @@ static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
} }
#ifdef CONFIG_IEEE80211N
static 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);
}
}
static 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);
}
#else /* CONFIG_IEEE80211N */
static u16 copy_sta_ht_capab(struct sta_info *sta, const u8 *ht_capab,
size_t ht_capab_len)
{
return WLAN_STATUS_SUCCESS;
}
static void update_ht_state(struct hostapd_data *hapd, struct sta_info *sta)
{
}
#endif /* CONFIG_IEEE80211N */
static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta, static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
u8 *ies, size_t ies_len, int reassoc) u8 *ies, size_t ies_len, int reassoc)
{ {
@ -907,10 +659,12 @@ static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
resp = copy_supp_rates(hapd, sta, &elems); resp = copy_supp_rates(hapd, sta, &elems);
if (resp != WLAN_STATUS_SUCCESS) if (resp != WLAN_STATUS_SUCCESS)
return resp; return resp;
#ifdef CONFIG_IEEE80211N
resp = copy_sta_ht_capab(sta, elems.ht_capabilities, resp = copy_sta_ht_capab(sta, elems.ht_capabilities,
elems.ht_capabilities_len); elems.ht_capabilities_len);
if (resp != WLAN_STATUS_SUCCESS) if (resp != WLAN_STATUS_SUCCESS)
return resp; return resp;
#endif /* CONFIG_IEEE80211N */
if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) { if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
wpa_ie = elems.rsn_ie; wpa_ie = elems.rsn_ie;
@ -1100,8 +854,10 @@ static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
if (sta->flags & WLAN_STA_WMM) if (sta->flags & WLAN_STA_WMM)
p = hostapd_eid_wmm(hapd, p); p = hostapd_eid_wmm(hapd, p);
#ifdef CONFIG_IEEE80211N
p = hostapd_eid_ht_capabilities(hapd, p); p = hostapd_eid_ht_capabilities(hapd, p);
p = hostapd_eid_ht_operation(hapd, p); p = hostapd_eid_ht_operation(hapd, p);
#endif /* CONFIG_IEEE80211N */
#ifdef CONFIG_IEEE80211R #ifdef CONFIG_IEEE80211R
if (status_code == WLAN_STATUS_SUCCESS) { if (status_code == WLAN_STATUS_SUCCESS) {
@ -1254,7 +1010,9 @@ static void handle_assoc(struct hostapd_data *hapd,
ieee802_11_set_beacons(hapd->iface); ieee802_11_set_beacons(hapd->iface);
} }
#ifdef CONFIG_IEEE80211N
update_ht_state(hapd, sta); update_ht_state(hapd, sta);
#endif /* CONFIG_IEEE80211N */
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_DEBUG, HOSTAPD_LEVEL_DEBUG,
@ -1700,28 +1458,6 @@ static void handle_auth_cb(struct hostapd_data *hapd,
} }
#ifdef CONFIG_IEEE80211N
static 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);
/* FIXME: Rx STBC needs to be handled specially */
cap |= (hapd->iconf->ht_capab & HT_CAP_INFO_RX_STBC_MASK);
neg_ht_cap->ht_capabilities_info = host_to_le16(cap);
}
#endif /* CONFIG_IEEE80211N */
static void handle_assoc_cb(struct hostapd_data *hapd, static void handle_assoc_cb(struct hostapd_data *hapd,
struct ieee80211_mgmt *mgmt, struct ieee80211_mgmt *mgmt,
size_t len, int reassoc, int ok) size_t len, int reassoc, int ok)
@ -1729,10 +1465,7 @@ static void handle_assoc_cb(struct hostapd_data *hapd,
u16 status; u16 status;
struct sta_info *sta; struct sta_info *sta;
int new_assoc = 1; int new_assoc = 1;
#ifdef CONFIG_IEEE80211N
struct ieee80211_ht_capabilities ht_cap; struct ieee80211_ht_capabilities ht_cap;
#endif /* CONFIG_IEEE80211N */
struct ieee80211_ht_capabilities *ht_cap_ptr = NULL;
int set_flags, flags_and, flags_or; int set_flags, flags_and, flags_or;
if (!ok) { if (!ok) {
@ -1788,13 +1521,6 @@ static void handle_assoc_cb(struct hostapd_data *hapd,
else else
mlme_associate_indication(hapd, sta); mlme_associate_indication(hapd, sta);
#ifdef CONFIG_IEEE80211N
if (sta->flags & WLAN_STA_HT) {
ht_cap_ptr = &ht_cap;
hostapd_get_ht_capab(hapd, sta->ht_capabilities, ht_cap_ptr);
}
#endif /* CONFIG_IEEE80211N */
#ifdef CONFIG_IEEE80211W #ifdef CONFIG_IEEE80211W
sta->sa_query_timed_out = 0; sta->sa_query_timed_out = 0;
#endif /* CONFIG_IEEE80211W */ #endif /* CONFIG_IEEE80211W */
@ -1806,10 +1532,15 @@ static void handle_assoc_cb(struct hostapd_data *hapd,
*/ */
hostapd_sta_remove(hapd, sta->addr); hostapd_sta_remove(hapd, sta->addr);
#ifdef CONFIG_IEEE80211N
if (sta->flags & WLAN_STA_HT)
hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
#endif /* CONFIG_IEEE80211N */
if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid, if (hostapd_sta_add(hapd->conf->iface, hapd, sta->addr, sta->aid,
sta->capability, sta->supported_rates, sta->capability, sta->supported_rates,
sta->supported_rates_len, 0, sta->listen_interval, sta->supported_rates_len, 0, sta->listen_interval,
ht_cap_ptr)) sta->flags & WLAN_STA_HT ? &ht_cap : NULL))
{ {
hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_NOTICE, HOSTAPD_LEVEL_NOTICE,

9
hostapd/ieee802_11.h
View File

@ -1,7 +1,6 @@
/* /*
* hostapd / IEEE 802.11 Management * hostapd / IEEE 802.11 Management
* Copyright (c) 2002-2006, Jouni Malinen <j@w1.fi> * 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 * 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 * it under the terms of the GNU General Public License version 2 as
@ -57,5 +56,11 @@ u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid);
int hostapd_ht_operation_update(struct hostapd_iface *iface); int hostapd_ht_operation_update(struct hostapd_iface *iface);
void ieee802_11_send_sa_query_req(struct hostapd_data *hapd, void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
const u8 *addr, const u8 *trans_id); const u8 *addr, const u8 *trans_id);
void hostapd_get_ht_capab(struct hostapd_data *hapd,
struct ieee80211_ht_capabilities *ht_cap,
struct ieee80211_ht_capabilities *neg_ht_cap);
u16 copy_sta_ht_capab(struct sta_info *sta, const u8 *ht_capab,
size_t ht_capab_len);
void update_ht_state(struct hostapd_data *hapd, struct sta_info *sta);
#endif /* IEEE802_11_H */ #endif /* IEEE802_11_H */

262
hostapd/ieee802_11_ht.c Normal file
View File

@ -0,0 +1,262 @@
/*
* 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 "includes.h"
#include "common.h"
#include "drivers/driver.h"
#include "hostapd.h"
#include "config.h"
#include "sta_flags.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)
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);
/* FIXME: Rx STBC needs to be handled specially */
cap |= (hapd->iconf->ht_capab & HT_CAP_INFO_RX_STBC_MASK);
neg_ht_cap->ht_capabilities_info = host_to_le16(cap);
}

7
hostapd/sta_info.c
View File

@ -1,7 +1,6 @@
/* /*
* hostapd / Station table * hostapd / Station table
* Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi> * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
* Copyright (c) 2007-2008, Intel Corporation
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as
@ -157,7 +156,6 @@ void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
set_beacon++; set_beacon++;
} }
#ifdef CONFIG_IEEE80211N
if (sta->no_ht_gf_set) { if (sta->no_ht_gf_set) {
sta->no_ht_gf_set = 0; sta->no_ht_gf_set = 0;
hapd->iface->num_sta_ht_no_gf--; hapd->iface->num_sta_ht_no_gf--;
@ -173,11 +171,10 @@ void ap_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
hapd->iface->num_sta_ht_20mhz--; hapd->iface->num_sta_ht_20mhz--;
} }
#ifdef NEED_AP_MLME #if defined(NEED_AP_MLME) && defined(CONFIG_IEEE80211N)
if (hostapd_ht_operation_update(hapd->iface) > 0) if (hostapd_ht_operation_update(hapd->iface) > 0)
set_beacon++; set_beacon++;
#endif /* NEED_AP_MLME */ #endif /* NEED_AP_MLME && CONFIG_IEEE80211N */
#endif /* CONFIG_IEEE80211N */
if (set_beacon) if (set_beacon)
ieee802_11_set_beacons(hapd->iface); ieee802_11_set_beacons(hapd->iface);