From d9fe60dea7779d412b34679f1177c5ca1940ea8d Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 9 Oct 2008 12:13:49 +0200 Subject: 802.11: clean up/fix HT support This patch cleans up a number of things: * the unusable definition of the HT capabilities/HT information information elements * variable names that are hard to understand * mac80211: move ieee80211_handle_ht to ht.c and remove the unused enable_ht parameter * mac80211: fix bug with MCS rate 32 in ieee80211_handle_ht * mac80211: fix bug with casting the result of ieee80211_bss_get_ie to an information element _contents_ rather than the whole element, add size checking (another out-of-bounds access bug fixed!) * mac80211: remove some unused return values in favour of BUG_ON checking * a few minor other things Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- include/linux/ieee80211.h | 133 +++++++++++++++++++++++++++++++++------------- include/net/mac80211.h | 12 ++--- include/net/wireless.h | 15 +++--- 3 files changed, 109 insertions(+), 51 deletions(-) (limited to 'include') diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 14126bc3664..64a4abce6d9 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -685,28 +685,88 @@ struct ieee80211_bar { #define IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL 0x0000 #define IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA 0x0004 + +#define IEEE80211_HT_MCS_MASK_LEN 10 + +/** + * struct ieee80211_mcs_info - MCS information + * @rx_mask: RX mask + * @rx_highest: highest supported RX rate + * @tx_params: TX parameters + */ +struct ieee80211_mcs_info { + u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN]; + __le16 rx_highest; + u8 tx_params; + u8 reserved[3]; +} __attribute__((packed)); + +/* 802.11n HT capability MSC set */ +#define IEEE80211_HT_MCS_RX_HIGHEST_MASK 0x3ff +#define IEEE80211_HT_MCS_TX_DEFINED 0x01 +#define IEEE80211_HT_MCS_TX_RX_DIFF 0x02 +/* value 0 == 1 stream etc */ +#define IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK 0x0C +#define IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT 2 +#define IEEE80211_HT_MCS_TX_MAX_STREAMS 4 +#define IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION 0x10 + +/* + * 802.11n D5.0 20.3.5 / 20.6 says: + * - indices 0 to 7 and 32 are single spatial stream + * - 8 to 31 are multiple spatial streams using equal modulation + * [8..15 for two streams, 16..23 for three and 24..31 for four] + * - remainder are multiple spatial streams using unequal modulation + */ +#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START 33 +#define IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE \ + (IEEE80211_HT_MCS_UNEQUAL_MODULATION_START / 8) + /** * struct ieee80211_ht_cap - HT capabilities * - * This structure refers to "HT capabilities element" as - * described in 802.11n draft section 7.3.2.52 + * This structure is the "HT capabilities element" as + * described in 802.11n D5.0 7.3.2.57 */ struct ieee80211_ht_cap { __le16 cap_info; u8 ampdu_params_info; - u8 supp_mcs_set[16]; + + /* 16 bytes MCS information */ + struct ieee80211_mcs_info mcs; + __le16 extended_ht_cap_info; __le32 tx_BF_cap_info; u8 antenna_selection_info; } __attribute__ ((packed)); +/* 802.11n HT capabilities masks (for cap_info) */ +#define IEEE80211_HT_CAP_LDPC_CODING 0x0001 +#define IEEE80211_HT_CAP_SUP_WIDTH_20_40 0x0002 +#define IEEE80211_HT_CAP_SM_PS 0x000C +#define IEEE80211_HT_CAP_GRN_FLD 0x0010 +#define IEEE80211_HT_CAP_SGI_20 0x0020 +#define IEEE80211_HT_CAP_SGI_40 0x0040 +#define IEEE80211_HT_CAP_TX_STBC 0x0080 +#define IEEE80211_HT_CAP_RX_STBC 0x0300 +#define IEEE80211_HT_CAP_DELAY_BA 0x0400 +#define IEEE80211_HT_CAP_MAX_AMSDU 0x0800 +#define IEEE80211_HT_CAP_DSSSCCK40 0x1000 +#define IEEE80211_HT_CAP_PSMP_SUPPORT 0x2000 +#define IEEE80211_HT_CAP_40MHZ_INTOLERANT 0x4000 +#define IEEE80211_HT_CAP_LSIG_TXOP_PROT 0x8000 + +/* 802.11n HT capability AMPDU settings (for ampdu_params_info) */ +#define IEEE80211_HT_AMPDU_PARM_FACTOR 0x03 +#define IEEE80211_HT_AMPDU_PARM_DENSITY 0x1C + /** - * struct ieee80211_ht_cap - HT additional information + * struct ieee80211_ht_info - HT information * - * This structure refers to "HT information element" as - * described in 802.11n draft section 7.3.2.53 + * This structure is the "HT information element" as + * described in 802.11n D5.0 7.3.2.58 */ -struct ieee80211_ht_addt_info { +struct ieee80211_ht_info { u8 control_chan; u8 ht_param; __le16 operation_mode; @@ -714,36 +774,33 @@ struct ieee80211_ht_addt_info { u8 basic_set[16]; } __attribute__ ((packed)); -/* 802.11n HT capabilities masks */ -#define IEEE80211_HT_CAP_SUP_WIDTH 0x0002 -#define IEEE80211_HT_CAP_SM_PS 0x000C -#define IEEE80211_HT_CAP_GRN_FLD 0x0010 -#define IEEE80211_HT_CAP_SGI_20 0x0020 -#define IEEE80211_HT_CAP_SGI_40 0x0040 -#define IEEE80211_HT_CAP_DELAY_BA 0x0400 -#define IEEE80211_HT_CAP_MAX_AMSDU 0x0800 -#define IEEE80211_HT_CAP_DSSSCCK40 0x1000 -/* 802.11n HT capability AMPDU settings */ -#define IEEE80211_HT_CAP_AMPDU_FACTOR 0x03 -#define IEEE80211_HT_CAP_AMPDU_DENSITY 0x1C -/* 802.11n HT capability MSC set */ -#define IEEE80211_SUPP_MCS_SET_UEQM 4 -#define IEEE80211_HT_CAP_MAX_STREAMS 4 -#define IEEE80211_SUPP_MCS_SET_LEN 10 -/* maximum streams the spec allows */ -#define IEEE80211_HT_CAP_MCS_TX_DEFINED 0x01 -#define IEEE80211_HT_CAP_MCS_TX_RX_DIFF 0x02 -#define IEEE80211_HT_CAP_MCS_TX_STREAMS 0x0C -#define IEEE80211_HT_CAP_MCS_TX_UEQM 0x10 -/* 802.11n HT IE masks */ -#define IEEE80211_HT_IE_CHA_SEC_OFFSET 0x03 -#define IEEE80211_HT_IE_CHA_SEC_NONE 0x00 -#define IEEE80211_HT_IE_CHA_SEC_ABOVE 0x01 -#define IEEE80211_HT_IE_CHA_SEC_BELOW 0x03 -#define IEEE80211_HT_IE_CHA_WIDTH 0x04 -#define IEEE80211_HT_IE_HT_PROTECTION 0x0003 -#define IEEE80211_HT_IE_NON_GF_STA_PRSNT 0x0004 -#define IEEE80211_HT_IE_NON_HT_STA_PRSNT 0x0010 +/* for ht_param */ +#define IEEE80211_HT_PARAM_CHA_SEC_OFFSET 0x03 +#define IEEE80211_HT_PARAM_CHA_SEC_NONE 0x00 +#define IEEE80211_HT_PARAM_CHA_SEC_ABOVE 0x01 +#define IEEE80211_HT_PARAM_CHA_SEC_BELOW 0x03 +#define IEEE80211_HT_PARAM_CHAN_WIDTH_ANY 0x04 +#define IEEE80211_HT_PARAM_RIFS_MODE 0x08 +#define IEEE80211_HT_PARAM_SPSMP_SUPPORT 0x10 +#define IEEE80211_HT_PARAM_SERV_INTERVAL_GRAN 0xE0 + +/* for operation_mode */ +#define IEEE80211_HT_OP_MODE_PROTECTION 0x0003 +#define IEEE80211_HT_OP_MODE_PROTECTION_NONE 0 +#define IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER 1 +#define IEEE80211_HT_OP_MODE_PROTECTION_20MHZ 2 +#define IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED 3 +#define IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT 0x0004 +#define IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT 0x0010 + +/* for stbc_param */ +#define IEEE80211_HT_STBC_PARAM_DUAL_BEACON 0x0040 +#define IEEE80211_HT_STBC_PARAM_DUAL_CTS_PROT 0x0080 +#define IEEE80211_HT_STBC_PARAM_STBC_BEACON 0x0100 +#define IEEE80211_HT_STBC_PARAM_LSIG_TXOP_FULLPROT 0x0200 +#define IEEE80211_HT_STBC_PARAM_PCO_ACTIVE 0x0400 +#define IEEE80211_HT_STBC_PARAM_PCO_PHASE 0x0800 + /* block-ack parameters */ #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 @@ -949,7 +1006,7 @@ enum ieee80211_eid { WLAN_EID_EXT_SUPP_RATES = 50, /* 802.11n */ WLAN_EID_HT_CAPABILITY = 45, - WLAN_EID_HT_EXTRA_INFO = 61, + WLAN_EID_HT_INFORMATION = 61, /* 802.11i */ WLAN_EID_RSN = 48, WLAN_EID_WPA = 221, diff --git a/include/net/mac80211.h b/include/net/mac80211.h index d1466e7a47b..2870f3973f1 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -191,7 +191,7 @@ enum ieee80211_bss_change { * @beacon_int: beacon interval * @assoc_capability: capabilities taken from assoc resp * @assoc_ht: association in HT mode - * @ht_conf: ht capabilities + * @ht_cap: ht capabilities * @ht_bss_conf: ht extended capabilities * @basic_rates: bitmap of basic rates, each bit stands for an * index into the rate table configured by the driver in @@ -212,7 +212,7 @@ struct ieee80211_bss_conf { u64 basic_rates; /* ht related data */ bool assoc_ht; - struct ieee80211_ht_info *ht_conf; + struct ieee80211_sta_ht_cap *ht_cap; struct ieee80211_ht_bss_info *ht_bss_conf; }; @@ -477,7 +477,7 @@ static inline int __deprecated __IEEE80211_CONF_SHORT_SLOT_TIME(void) * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, * 1/2: antenna 0/1 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx - * @ht_conf: describes current self configuration of 802.11n HT capabilies + * @ht_cap: describes current self configuration of 802.11n HT capabilities * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters * @channel: the channel to tune to */ @@ -493,7 +493,7 @@ struct ieee80211_conf { struct ieee80211_channel *channel; - struct ieee80211_ht_info ht_conf; + struct ieee80211_sta_ht_cap ht_cap; struct ieee80211_ht_bss_info ht_bss_conf; }; @@ -687,7 +687,7 @@ enum set_key_cmd { * @addr: MAC address * @aid: AID we assigned to the station if we're an AP * @supp_rates: Bitmap of supported rates (per band) - * @ht_info: HT capabilities of this STA + * @ht_cap: HT capabilities of this STA * @drv_priv: data area for driver use, will always be aligned to * sizeof(void *), size is determined in hw information. */ @@ -695,7 +695,7 @@ struct ieee80211_sta { u64 supp_rates[IEEE80211_NUM_BANDS]; u8 addr[ETH_ALEN]; u16 aid; - struct ieee80211_ht_info ht_info; + struct ieee80211_sta_ht_cap ht_cap; /* must be last */ u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); diff --git a/include/net/wireless.h b/include/net/wireless.h index 721efb363db..c0aa0fb8db5 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -10,6 +10,7 @@ #include #include #include +#include #include /** @@ -133,23 +134,23 @@ struct ieee80211_rate { }; /** - * struct ieee80211_ht_info - describing STA's HT capabilities + * struct ieee80211_sta_ht_cap - STA's HT capabilities * * This structure describes most essential parameters needed * to describe 802.11n HT capabilities for an STA. * - * @ht_supported: is HT supported by STA, 0: no, 1: yes + * @ht_supported: is HT supported by the STA * @cap: HT capabilities map as described in 802.11n spec * @ampdu_factor: Maximum A-MPDU length factor * @ampdu_density: Minimum A-MPDU spacing - * @supp_mcs_set: Supported MCS set as described in 802.11n spec + * @mcs: Supported MCS rates */ -struct ieee80211_ht_info { +struct ieee80211_sta_ht_cap { u16 cap; /* use IEEE80211_HT_CAP_ */ - u8 ht_supported; + bool ht_supported; u8 ampdu_factor; u8 ampdu_density; - u8 supp_mcs_set[16]; + struct ieee80211_mcs_info mcs; }; /** @@ -173,7 +174,7 @@ struct ieee80211_supported_band { enum ieee80211_band band; int n_channels; int n_bitrates; - struct ieee80211_ht_info ht_info; + struct ieee80211_sta_ht_cap ht_cap; }; /** -- cgit v1.2.3