This patch presents the ability to parse and compose HT IEs, and to put
the IE relevant data inside the mac80211's internal HT structures
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@xxxxxxxxx>
---
net/mac80211/ieee80211_i.h | 8 +++-
net/mac80211/ieee80211_sta.c | 89 +++++++++++++++++++++++++++++++++++++++++-
2 files changed, 94 insertions(+), 3 deletions(-)
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index b4e32ab..915d7b1 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -89,6 +89,8 @@ struct ieee80211_sta_bss {
size_t rsn_ie_len;
u8 *wmm_ie;
size_t wmm_ie_len;
+ u8 *ht_ie;
+ size_t ht_ie_len;
#define IEEE80211_MAX_SUPP_RATES 32
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
size_t supp_rates_len;
@@ -759,7 +761,11 @@ int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason);
int ieee80211_sta_disassociate(struct net_device *dev, u16 reason);
void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes);
void ieee80211_reset_erp_info(struct net_device *dev);
-
+int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
+ struct ieee80211_ht_info *ht_info);
+int ieee80211_ht_addt_info_ie_to_ht_bss_info(
+ struct ieee80211_ht_addt_info *ht_add_info_ie,
+ struct ieee80211_ht_bss_info *bss_info);
/* ieee80211_iface.c */
int ieee80211_if_add(struct net_device *dev, const char *name,
struct net_device **new_dev, int type);
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index 2079e98..7b1773c 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -90,7 +90,8 @@ struct ieee802_11_elems {
u8 *ext_supp_rates;
u8 *wmm_info;
u8 *wmm_param;
-
+ u8 *ht_cap_elem;
+ u8 *ht_info_elem;
/* length of them, respectively */
u8 ssid_len;
u8 supp_rates_len;
@@ -106,6 +107,8 @@ struct ieee802_11_elems {
u8 ext_supp_rates_len;
u8 wmm_info_len;
u8 wmm_param_len;
+ u8 ht_cap_elem_len;
+ u8 ht_info_elem_len;
};
static void ieee802_11_parse_elems(u8 *start, size_t len,
@@ -190,6 +193,14 @@ static void ieee802_11_parse_elems(u8 *start, size_t len,
elems->ext_supp_rates = pos;
elems->ext_supp_rates_len = elen;
break;
+ case WLAN_EID_HT_CAPABILITY:
+ elems->ht_cap_elem = pos;
+ elems->ht_cap_elem_len = elen;
+ break;
+ case WLAN_EID_HT_EXTRA_INFO:
+ elems->ht_info_elem = pos;
+ elems->ht_info_elem_len = elen;
+ break;
default:
break;
}
@@ -332,6 +343,51 @@ static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
ieee80211_erp_info_change_notify(dev, changes);
}
+int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
+ struct ieee80211_ht_info *ht_info)
+{
+
+ if (ht_info == NULL)
+ return -EINVAL;
+
+ memset(ht_info, 0, sizeof(*ht_info));
+
+ if (ht_cap_ie) {
+ u8 ampdu_info = ht_cap_ie->ampdu_params_info;
+
+ ht_info->ht_supported = 1;
+ ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
+ ht_info->ampdu_factor =
+ ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
+ ht_info->ampdu_density =
+ (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
+ memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
+ } else
+ ht_info->ht_supported = 0;
+
+ return 0;
+}
+
+int ieee80211_ht_addt_info_ie_to_ht_bss_info(
+ struct ieee80211_ht_addt_info *ht_add_info_ie,
+ struct ieee80211_ht_bss_info *bss_info)
+{
+ if (bss_info == NULL)
+ return -EINVAL;
+
+ memset(bss_info, 0, sizeof(*bss_info));
+
+ if (ht_add_info_ie) {
+ u16 op_mode;
+ op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
+
+ bss_info->primary_channel = ht_add_info_ie->control_chan;
+ bss_info->bss_cap = ht_add_info_ie->ht_param;
+ bss_info->bss_op_mode = (u8)(op_mode & 0xff);
+ }
+
+ return 0;
+}
static void ieee80211_sta_send_associnfo(struct net_device *dev,
struct ieee80211_if_sta *ifsta)
@@ -630,6 +686,19 @@ static void ieee80211_send_assoc(struct net_device *dev,
*pos++ = 1; /* WME ver */
*pos++ = 0;
}
+ /* wmm support is a must to HT */
+ if (wmm && mode->ht_info.ht_supported) {
+ __le16 tmp = cpu_to_le16(mode->ht_info.cap);
+ pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
+ *pos++ = WLAN_EID_HT_CAPABILITY;
+ *pos++ = sizeof(struct ieee80211_ht_cap);
+ memset(pos, 0, sizeof(struct ieee80211_ht_cap));
+ memcpy(pos, &tmp, sizeof(u16));
+ pos += sizeof(u16);
+ *pos++ = (mode->ht_info.ampdu_factor |
+ (mode->ht_info.ampdu_density << 2));
+ memcpy(pos, mode->ht_info.supp_mcs_set, 16);
+ }
kfree(ifsta->assocreq_ies);
ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
@@ -1384,6 +1453,7 @@ static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
kfree(bss->wpa_ie);
kfree(bss->rsn_ie);
kfree(bss->wmm_ie);
+ kfree(bss->ht_ie);
kfree(bss);
}
@@ -1631,7 +1701,22 @@ static void ieee80211_rx_bss_info(struct net_device *dev,
bss->wmm_ie = NULL;
bss->wmm_ie_len = 0;
}
-
+ if (elems.ht_cap_elem &&
+ (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
+ memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
+ kfree(bss->ht_ie);
+ bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
+ if (bss->ht_ie) {
+ memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
+ elems.ht_cap_elem_len + 2);
+ bss->ht_ie_len = elems.ht_cap_elem_len + 2;
+ } else
+ bss->ht_ie_len = 0;
+ } else if (!elems.ht_cap_elem && bss->ht_ie) {
+ kfree(bss->ht_ie);
+ bss->ht_ie = NULL;
+ bss->ht_ie_len = 0;
+ }
bss->hw_mode = rx_status->phymode;
bss->freq = rx_status->freq;
--
1.5.3.3
---------------------------------------------------------------------
Intel Israel (74) Limited
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