X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=libeap%2Fsrc%2Fap%2Fieee802_11_ht.c;h=11fde2a26394607e32f9d6f02eb7750474f0a9ff;hb=4f319dde67a76fe0aaf33f6d2788968012584ada;hp=7541b83816d029d3e5ef56ad424c55d7f48bd216;hpb=ed09b5e64dd485851310307979d5eed14678087b;p=mech_eap.git

diff --git a/libeap/src/ap/ieee802_11_ht.c b/libeap/src/ap/ieee802_11_ht.c
index 7541b83..11fde2a 100644
--- a/libeap/src/ap/ieee802_11_ht.c
+++ b/libeap/src/ap/ieee802_11_ht.c
@@ -3,26 +3,22 @@
  * 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.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
  */
 
 #include "utils/includes.h"
 
 #include "utils/common.h"
+#include "utils/eloop.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"
+#include "hw_features.h"
+#include "ap_drv_ops.h"
 
 
 u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
@@ -30,7 +26,8 @@ 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)
+	if (!hapd->iconf->ieee80211n || !hapd->iface->current_mode ||
+	    hapd->conf->disable_11n)
 		return eid;
 
 	*pos++ = WLAN_EID_HT_CAP;
@@ -49,6 +46,35 @@ u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
 
  	pos += sizeof(*cap);
 
+	if (hapd->iconf->obss_interval) {
+		struct ieee80211_obss_scan_parameters *scan_params;
+
+		*pos++ = WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS;
+		*pos++ = sizeof(*scan_params);
+
+		scan_params = (struct ieee80211_obss_scan_parameters *) pos;
+		os_memset(scan_params, 0, sizeof(*scan_params));
+		scan_params->width_trigger_scan_interval =
+			host_to_le16(hapd->iconf->obss_interval);
+
+		/* Fill in default values for remaining parameters
+		 * (IEEE Std 802.11-2012, 8.4.2.61 and MIB defval) */
+		scan_params->scan_passive_dwell =
+			host_to_le16(20);
+		scan_params->scan_active_dwell =
+			host_to_le16(10);
+		scan_params->scan_passive_total_per_channel =
+			host_to_le16(200);
+		scan_params->scan_active_total_per_channel =
+			host_to_le16(20);
+		scan_params->channel_transition_delay_factor =
+			host_to_le16(5);
+		scan_params->scan_activity_threshold =
+			host_to_le16(25);
+
+		pos += sizeof(*scan_params);
+	}
+
 	return pos;
 }
 
@@ -58,7 +84,7 @@ u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
 	struct ieee80211_ht_operation *oper;
 	u8 *pos = eid;
 
-	if (!hapd->iconf->ieee80211n)
+	if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
 		return eid;
 
 	*pos++ = WLAN_EID_HT_OPERATION;
@@ -67,14 +93,14 @@ u8 * hostapd_eid_ht_operation(struct hostapd_data *hapd, u8 *eid)
 	oper = (struct ieee80211_ht_operation *) pos;
 	os_memset(oper, 0, sizeof(*oper));
 
-	oper->control_chan = hapd->iconf->channel;
+	oper->primary_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;
+			HT_INFO_HT_PARAM_STA_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;
+			HT_INFO_HT_PARAM_STA_CHNL_WIDTH;
 
 	pos += sizeof(*oper);
 
@@ -92,7 +118,6 @@ Set to 1 (HT non-member protection) if there may be non-HT STAs
 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)
 {
@@ -105,50 +130,40 @@ int hostapd_ht_operation_update(struct hostapd_iface *iface)
 	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)
+	if (!(iface->ht_op_mode & HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT)
 	    && iface->num_sta_ht_no_gf) {
-		iface->ht_op_mode |=
-			HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
+		iface->ht_op_mode |= HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT;
 		op_mode_changes++;
 	} else if ((iface->ht_op_mode &
-		    HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT) &&
+		    HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT) &&
 		   iface->num_sta_ht_no_gf == 0) {
-		iface->ht_op_mode &=
-			~HT_INFO_OPERATION_MODE_NON_GF_DEVS_PRESENT;
+		iface->ht_op_mode &= ~HT_OPER_OP_MODE_NON_GF_HT_STAS_PRESENT;
 		op_mode_changes++;
 	}
 
-	if (!(iface->ht_op_mode & HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
+	if (!(iface->ht_op_mode & HT_OPER_OP_MODE_OBSS_NON_HT_STAS_PRESENT) &&
 	    (iface->num_sta_no_ht || iface->olbc_ht)) {
-		iface->ht_op_mode |= HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
+		iface->ht_op_mode |= HT_OPER_OP_MODE_OBSS_NON_HT_STAS_PRESENT;
 		op_mode_changes++;
 	} else if ((iface->ht_op_mode &
-		    HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT) &&
+		    HT_OPER_OP_MODE_OBSS_NON_HT_STAS_PRESENT) &&
 		   (iface->num_sta_no_ht == 0 && !iface->olbc_ht)) {
-		iface->ht_op_mode &=
-			~HT_INFO_OPERATION_MODE_NON_HT_STA_PRESENT;
+		iface->ht_op_mode &= ~HT_OPER_OP_MODE_OBSS_NON_HT_STAS_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;
+	if (iface->num_sta_no_ht)
+		new_op_mode = HT_PROT_NON_HT_MIXED;
+	else if (iface->conf->secondary_channel && iface->num_sta_ht_20mhz)
+		new_op_mode = HT_PROT_20MHZ_PROTECTION;
 	else if (iface->olbc_ht)
-		new_op_mode = OP_MODE_MAY_BE_LEGACY_STAS;
+		new_op_mode = HT_PROT_NONMEMBER_PROTECTION;
 	else
-		new_op_mode = OP_MODE_PURE;
+		new_op_mode = HT_PROT_NO_PROTECTION;
 
-	cur_op_mode = iface->ht_op_mode & HT_INFO_OPERATION_MODE_OP_MODE_MASK;
+	cur_op_mode = iface->ht_op_mode & HT_OPER_OP_MODE_HT_PROT_MASK;
 	if (cur_op_mode != new_op_mode) {
-		iface->ht_op_mode &= ~HT_INFO_OPERATION_MODE_OP_MODE_MASK;
+		iface->ht_op_mode &= ~HT_OPER_OP_MODE_HT_PROT_MASK;
 		iface->ht_op_mode |= new_op_mode;
 		op_mode_changes++;
 	}
@@ -160,11 +175,150 @@ int hostapd_ht_operation_update(struct hostapd_iface *iface)
 }
 
 
-u16 copy_sta_ht_capab(struct sta_info *sta, const u8 *ht_capab,
-		      size_t ht_capab_len)
+static int is_40_allowed(struct hostapd_iface *iface, int channel)
 {
+	int pri_freq, sec_freq;
+	int affected_start, affected_end;
+	int pri = 2407 + 5 * channel;
+
+	if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
+		return 1;
+
+	pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
+
+	if (iface->conf->secondary_channel > 0)
+		sec_freq = pri_freq + 20;
+	else
+		sec_freq = pri_freq - 20;
+
+	affected_start = (pri_freq + sec_freq) / 2 - 25;
+	affected_end = (pri_freq + sec_freq) / 2 + 25;
+	if ((pri < affected_start || pri > affected_end))
+		return 1; /* not within affected channel range */
+
+	wpa_printf(MSG_ERROR, "40 MHz affected channel range: [%d,%d] MHz",
+		   affected_start, affected_end);
+	wpa_printf(MSG_ERROR, "Neighboring BSS: freq=%d", pri);
+	return 0;
+}
+
+
+void hostapd_2040_coex_action(struct hostapd_data *hapd,
+			      const struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct hostapd_iface *iface = hapd->iface;
+	struct ieee80211_2040_bss_coex_ie *bc_ie;
+	struct ieee80211_2040_intol_chan_report *ic_report;
+	int is_ht40_allowed = 1;
+	int i;
+	const u8 *start = (const u8 *) mgmt;
+	const u8 *data = start + IEEE80211_HDRLEN + 2;
+
+	hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
+		       HOSTAPD_LEVEL_DEBUG, "hostapd_public_action - action=%d",
+		       mgmt->u.action.u.public_action.action);
+
+	if (!(iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
+		return;
+
+	if (len < IEEE80211_HDRLEN + 2 + sizeof(*bc_ie))
+		return;
+
+	bc_ie = (struct ieee80211_2040_bss_coex_ie *) data;
+	if (bc_ie->element_id != WLAN_EID_20_40_BSS_COEXISTENCE ||
+	    bc_ie->length < 1) {
+		wpa_printf(MSG_DEBUG, "Unexpected IE (%u,%u) in coex report",
+			   bc_ie->element_id, bc_ie->length);
+		return;
+	}
+	if (len < IEEE80211_HDRLEN + 2 + 2 + bc_ie->length)
+		return;
+	data += 2 + bc_ie->length;
+
+	wpa_printf(MSG_DEBUG, "20/40 BSS Coexistence Information field: 0x%x",
+		   bc_ie->coex_param);
+	if (bc_ie->coex_param & WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ) {
+		hostapd_logger(hapd, mgmt->sa,
+			       HOSTAPD_MODULE_IEEE80211,
+			       HOSTAPD_LEVEL_DEBUG,
+			       "20 MHz BSS width request bit is set in BSS coexistence information field");
+		is_ht40_allowed = 0;
+	}
+
+	if (bc_ie->coex_param & WLAN_20_40_BSS_COEX_40MHZ_INTOL) {
+		hostapd_logger(hapd, mgmt->sa,
+			       HOSTAPD_MODULE_IEEE80211,
+			       HOSTAPD_LEVEL_DEBUG,
+			       "40 MHz intolerant bit is set in BSS coexistence information field");
+		is_ht40_allowed = 0;
+	}
+
+	if (start + len - data >= 3 &&
+	    data[0] == WLAN_EID_20_40_BSS_INTOLERANT && data[1] >= 1) {
+		u8 ielen = data[1];
+
+		if (ielen > start + len - data - 2)
+			return;
+		ic_report = (struct ieee80211_2040_intol_chan_report *) data;
+		wpa_printf(MSG_DEBUG,
+			   "20/40 BSS Intolerant Channel Report: Operating Class %u",
+			   ic_report->op_class);
+
+		/* Go through the channel report to find any BSS there in the
+		 * affected channel range */
+		for (i = 0; i < ielen - 1; i++) {
+			u8 chan = ic_report->variable[i];
+
+			if (is_40_allowed(iface, chan))
+				continue;
+			hostapd_logger(hapd, mgmt->sa,
+				       HOSTAPD_MODULE_IEEE80211,
+				       HOSTAPD_LEVEL_DEBUG,
+				       "20_40_INTOLERANT channel %d reported",
+				       chan);
+			is_ht40_allowed = 0;
+		}
+	}
+	wpa_printf(MSG_DEBUG, "is_ht40_allowed=%d num_sta_ht40_intolerant=%d",
+		   is_ht40_allowed, iface->num_sta_ht40_intolerant);
+
+	if (!is_ht40_allowed &&
+	    (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX)) {
+		if (iface->conf->secondary_channel) {
+			hostapd_logger(hapd, mgmt->sa,
+				       HOSTAPD_MODULE_IEEE80211,
+				       HOSTAPD_LEVEL_INFO,
+				       "Switching to 20 MHz operation");
+			iface->conf->secondary_channel = 0;
+			ieee802_11_set_beacons(iface);
+		}
+		if (!iface->num_sta_ht40_intolerant &&
+		    iface->conf->obss_interval) {
+			unsigned int delay_time;
+			delay_time = OVERLAPPING_BSS_TRANS_DELAY_FACTOR *
+				iface->conf->obss_interval;
+			eloop_cancel_timeout(ap_ht2040_timeout, hapd->iface,
+					     NULL);
+			eloop_register_timeout(delay_time, 0, ap_ht2040_timeout,
+					       hapd->iface, NULL);
+			wpa_printf(MSG_DEBUG,
+				   "Reschedule HT 20/40 timeout to occur in %u seconds",
+				   delay_time);
+		}
+	}
+}
+
+
+u16 copy_sta_ht_capab(struct hostapd_data *hapd, struct sta_info *sta,
+		      const u8 *ht_capab)
+{
+	/*
+	 * Disable HT caps for STAs associated to no-HT BSSes, or for stations
+	 * that did not specify a valid WMM IE in the (Re)Association Request
+	 * frame.
+	 */
 	if (!ht_capab ||
-	    ht_capab_len < sizeof(struct ieee80211_ht_capabilities)) {
+	    !(sta->flags & WLAN_STA_WMM) || hapd->conf->disable_11n) {
 		sta->flags &= ~WLAN_STA_HT;
 		os_free(sta->ht_capabilities);
 		sta->ht_capabilities = NULL;
@@ -186,6 +340,52 @@ u16 copy_sta_ht_capab(struct sta_info *sta, const u8 *ht_capab,
 }
 
 
+void ht40_intolerant_add(struct hostapd_iface *iface, struct sta_info *sta)
+{
+	if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
+		return;
+
+	wpa_printf(MSG_INFO, "HT: Forty MHz Intolerant is set by STA " MACSTR
+		   " in Association Request", MAC2STR(sta->addr));
+
+	if (sta->ht40_intolerant_set)
+		return;
+
+	sta->ht40_intolerant_set = 1;
+	iface->num_sta_ht40_intolerant++;
+	eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
+
+	if (iface->conf->secondary_channel &&
+	    (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX)) {
+		iface->conf->secondary_channel = 0;
+		ieee802_11_set_beacons(iface);
+	}
+}
+
+
+void ht40_intolerant_remove(struct hostapd_iface *iface, struct sta_info *sta)
+{
+	if (!sta->ht40_intolerant_set)
+		return;
+
+	sta->ht40_intolerant_set = 0;
+	iface->num_sta_ht40_intolerant--;
+
+	if (iface->num_sta_ht40_intolerant == 0 &&
+	    (iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
+	    (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX)) {
+		unsigned int delay_time = OVERLAPPING_BSS_TRANS_DELAY_FACTOR *
+			iface->conf->obss_interval;
+		wpa_printf(MSG_DEBUG,
+			   "HT: Start 20->40 MHz transition timer (%d seconds)",
+			   delay_time);
+		eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
+		eloop_register_timeout(delay_time, 0, ap_ht2040_timeout,
+				       iface, NULL);
+	}
+}
+
+
 static void update_sta_ht(struct hostapd_data *hapd, struct sta_info *sta)
 {
 	u16 ht_capab;
@@ -213,6 +413,9 @@ static void update_sta_ht(struct hostapd_data *hapd, struct sta_info *sta)
 			   __func__, MAC2STR(sta->addr),
 			   hapd->iface->num_sta_ht_20mhz);
 	}
+
+	if (ht_capab & HT_CAP_INFO_40MHZ_INTOLERANT)
+		ht40_intolerant_add(hapd->iface, sta);
 }
 
 
@@ -253,8 +456,14 @@ void hostapd_get_ht_capab(struct hostapd_data *hapd,
 		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);
+
+	/*
+	 * Mask out HT features we don't support, but don't overwrite
+	 * non-symmetric features like STBC and SMPS. Just because
+	 * we're not in dynamic SMPS mode the STA might still be.
+	 */
+	cap &= (hapd->iconf->ht_capab | HT_CAP_INFO_RX_STBC_MASK |
+		HT_CAP_INFO_TX_STBC | HT_CAP_INFO_SMPS_MASK);
 
 	/*
 	 * STBC needs to be handled specially
@@ -268,3 +477,14 @@ void hostapd_get_ht_capab(struct hostapd_data *hapd,
 
 	neg_ht_cap->ht_capabilities_info = host_to_le16(cap);
 }
+
+
+void ap_ht2040_timeout(void *eloop_data, void *user_data)
+{
+	struct hostapd_iface *iface = eloop_data;
+
+	wpa_printf(MSG_INFO, "Switching to 40 MHz operation");
+
+	iface->conf->secondary_channel = iface->secondary_ch;
+	ieee802_11_set_beacons(iface);
+}