From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Let user know which capabilities are supported.
Signed-off-by: Ben Greear <greearb@xxxxxxxxxxxxxxx>
---
v3: Don't make modifications to nl80211.h..put new code
in iw.h instead.
:100644 100644 b55b282... 040937c... M info.c
:100644 100644 a50d447... 441c724... M iw.h
:100644 100644 e03ec2c... c452a64... M util.c
info.c | 33 +++++++++++++++++++++++++++++++++
iw.h | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
util.c | 8 ++++++++
3 files changed, 87 insertions(+), 1 deletions(-)
diff --git a/info.c b/info.c
index b55b282..040937c 100644
--- a/info.c
+++ b/info.c
@@ -400,6 +400,39 @@ broken_combination:
if (tb_msg[NL80211_ATTR_SUPPORT_AP_UAPSD])
printf("\tDevice supports AP-side u-APSD.\n");
+ if (tb_msg[NL80211_ATTR_HT_CAPABILITY_MASK]) {
+ struct ieee80211_ht_cap *cm;
+ printf("\tHT Capabilities over-rides:\n");
+ if (nla_len(tb_msg[NL80211_ATTR_HT_CAPABILITY_MASK]) >=
+ sizeof(*cm)) {
+ cm = nla_data(tb_msg[NL80211_ATTR_HT_CAPABILITY_MASK]);
+ printf("\t\t * MCS: %02hx %02hx %02hx %02hx %02hx %02hx"
+ " %02hx %02hx %02hx %02hx\n",
+ cm->mcs.rx_mask[0], cm->mcs.rx_mask[1],
+ cm->mcs.rx_mask[2], cm->mcs.rx_mask[3],
+ cm->mcs.rx_mask[4], cm->mcs.rx_mask[5],
+ cm->mcs.rx_mask[6], cm->mcs.rx_mask[7],
+ cm->mcs.rx_mask[8], cm->mcs.rx_mask[9]);
+ printf("\t\t * MAX-AMSDU: %s\n"
+ "\t\t * WIDTH-20-40: %s\n"
+ "\t\t * SGI-40: %s\n"
+ "\t\t * AMPDU-Factor: %s\n"
+ "\t\t * AMPDU-Density: %s\n",
+ cm->cap_info & cpu_to_le16(IEEE80211_HT_CAP_MAX_AMSDU) ? "Yes" : "No",
+ cm->cap_info & cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40) ? "Yes" : "No",
+ cm->cap_info & cpu_to_le16(IEEE80211_HT_CAP_SGI_40) ? "Yes" : "No",
+ cm->ampdu_params_info & IEEE80211_HT_AMPDU_PARM_FACTOR ? "Yes" : "No",
+ cm->ampdu_params_info & IEEE80211_HT_AMPDU_PARM_DENSITY ? "Yes" : "No");
+ } else {
+ printf("\tERROR: capabilities mask is too short, expected: %d"
+ ", received: %d\n",
+ (int)(sizeof(*cm)),
+ (int)(nla_len(tb_msg[NL80211_ATTR_HT_CAPABILITY_MASK])));
+ }
+ } else {
+ printf("\tHT Capabilities over-rides are NOT supported.\n");
+ }
+
return NL_SKIP;
}
diff --git a/iw.h b/iw.h
index a50d447..441c724 100644
--- a/iw.h
+++ b/iw.h
@@ -125,7 +125,52 @@ __u32 __do_listen_events(struct nl80211_state *state,
const int n_waits, const __u32 *waits,
struct print_event_args *args);
-
+/* 802.11n HT capability AMPDU settings (for ampdu_params_info) */
+#define IEEE80211_HT_AMPDU_PARM_FACTOR 0x03
+#define IEEE80211_HT_AMPDU_PARM_DENSITY 0x1C
+
+#define IEEE80211_HT_CAP_SUP_WIDTH_20_40 0x0002
+#define IEEE80211_HT_CAP_SGI_40 0x0040
+#define IEEE80211_HT_CAP_MAX_AMSDU 0x0800
+
+#define IEEE80211_HT_MCS_MASK_LEN 10
+
+/**
+ * struct ieee80211_mcs_info - MCS information
+ * @rx_mask: RX mask
+ * @rx_highest: highest supported RX rate. If set represents
+ * the highest supported RX data rate in units of 1 Mbps.
+ * If this field is 0 this value should not be used to
+ * consider the highest RX data rate supported.
+ * @tx_params: TX parameters
+ */
+struct ieee80211_mcs_info {
+ __u8 rx_mask[IEEE80211_HT_MCS_MASK_LEN];
+ __u16 rx_highest;
+ __u8 tx_params;
+ __u8 reserved[3];
+} __attribute__ ((packed));
+
+
+/**
+ * struct ieee80211_ht_cap - HT capabilities
+ *
+ * This structure is the "HT capabilities element" as
+ * described in 802.11n D5.0 7.3.2.57
+ */
+struct ieee80211_ht_cap {
+ __u16 cap_info;
+ __u8 ampdu_params_info;
+
+ /* 16 bytes MCS information */
+ struct ieee80211_mcs_info mcs;
+
+ __u16 extended_ht_cap_info;
+ __u32 tx_BF_cap_info;
+ __u8 antenna_selection_info;
+} __attribute__ ((packed));
+
+unsigned short cpu_to_le16(unsigned short v);
int mac_addr_a2n(unsigned char *mac_addr, char *arg);
void mac_addr_n2a(char *mac_addr, unsigned char *arg);
int parse_hex_mask(char *hexmask, unsigned char **result, size_t *result_len,
diff --git a/util.c b/util.c
index e03ec2c..c452a64 100644
--- a/util.c
+++ b/util.c
@@ -5,6 +5,14 @@
#include "iw.h"
#include "nl80211.h"
+unsigned short cpu_to_le16(unsigned short v)
+{
+ unsigned short nv = htons(v);
+ /* and now swap this to get litte-endian */
+ return ((nv & 0xff) << 8) | ((nv & 0xff00) >> 8);
+}
+
+
void mac_addr_n2a(char *mac_addr, unsigned char *arg)
{
int i, l;
--
1.7.3.4
--
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