add human readable decoding for capability information field

diff --git a/scan.c b/scan.c
index 0cd3aa821446df1c2550c5f2cff5a12eb04a318b..8cd1f9063119a8e06ef467d25057928fe5cea367 100644 (file)
--- a/scan.c
+++ b/scan.c
@@ -13,6 +13,20 @@
 #include "nl80211.h"
 #include "iw.h"
 
+#define WLAN_CAPABILITY_ESS            (1<<0)
+#define WLAN_CAPABILITY_IBSS           (1<<1)
+#define WLAN_CAPABILITY_CF_POLLABLE    (1<<2)
+#define WLAN_CAPABILITY_CF_POLL_REQUEST        (1<<3)
+#define WLAN_CAPABILITY_PRIVACY                (1<<4)
+#define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
+#define WLAN_CAPABILITY_PBCC           (1<<6)
+#define WLAN_CAPABILITY_CHANNEL_AGILITY        (1<<7)
+#define WLAN_CAPABILITY_SPECTRUM_MGMT  (1<<8)
+#define WLAN_CAPABILITY_QOS            (1<<9)
+#define WLAN_CAPABILITY_SHORT_SLOT_TIME        (1<<10)
+#define WLAN_CAPABILITY_APSD           (1<<11)
+#define WLAN_CAPABILITY_DSSS_OFDM      (1<<13)
+
 struct scan_params {
        bool unknown;
 };
@@ -333,9 +347,33 @@ static int print_bss_handler(struct nl_msg *msg, void *arg)
        if (bss[NL80211_BSS_BEACON_INTERVAL])
                printf("\tbeacon interval: %d\n",
                        nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]));
-       if (bss[NL80211_BSS_CAPABILITY])
-               printf("\tcapability: 0x%.4x\n",
-                       nla_get_u16(bss[NL80211_BSS_CAPABILITY]));
+       if (bss[NL80211_BSS_CAPABILITY]) {
+               __u16 capa = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
+               printf("\tcapability:");
+               if (capa & WLAN_CAPABILITY_ESS)
+                       printf(" ESS");
+               if (capa & WLAN_CAPABILITY_IBSS)
+                       printf(" IBSS");
+               if (capa & WLAN_CAPABILITY_PRIVACY)
+                       printf(" Privacy");
+               if (capa & WLAN_CAPABILITY_SHORT_PREAMBLE)
+                       printf(" ShortPreamble");
+               if (capa & WLAN_CAPABILITY_PBCC)
+                       printf(" PBCC");
+               if (capa & WLAN_CAPABILITY_CHANNEL_AGILITY)
+                       printf(" ChannelAgility");
+               if (capa & WLAN_CAPABILITY_SPECTRUM_MGMT)
+                       printf(" SpectrumMgmt");
+               if (capa & WLAN_CAPABILITY_QOS)
+                       printf(" QoS");
+               if (capa & WLAN_CAPABILITY_SHORT_SLOT_TIME)
+                       printf(" ShortSlotTime");
+               if (capa & WLAN_CAPABILITY_APSD)
+                       printf(" APSD");
+               if (capa & WLAN_CAPABILITY_DSSS_OFDM)
+                       printf(" DSSS-OFDM");
+               printf(" (0x%.4x)\n", capa);
+       }
        if (bss[NL80211_BSS_SIGNAL_MBM]) {
                int s = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
                printf("\tsignal: %d.%.2d dBm\n", s/100, s%100);