Made 802.11 management frame IE parser aware of vendor HT Capab IE

This IE is not (at least yet) actually used for anything, but parsing it
cleans up verbose debug log a bit since thie previously unknown, but
commonly used, vendor IE was being reported as unknown.

src/common/ieee802_11_common.c

@@ -89,6 +89,21 @@ static int ieee802_11_parse_vendor_specific(u8 *pos, size_t elen,
 		}
 		break;
 
+	case OUI_BROADCOM:
+		switch (pos[3]) {
+		case VENDOR_HT_CAPAB_OUI_TYPE:
+			elems->vendor_ht_cap = pos;
+			elems->vendor_ht_cap_len = elen;
+			break;
+		default:
+			wpa_printf(MSG_MSGDUMP, "Unknown Broadcom "
+				   "information element ignored "
+				   "(type=%d len=%lu)\n",
+				   pos[3], (unsigned long) elen);
+			return -1;
+		}
+		break;
+
 	default:
 		wpa_printf(MSG_MSGDUMP, "unknown vendor specific information "
 			   "element ignored (vendor OUI %02x:%02x:%02x "

src/common/ieee802_11_common.h

@@ -61,6 +61,8 @@ struct ieee802_11_elems {
 	u8 ht_operation_len;
 	u8 *assoc_comeback;
 	u8 assoc_comeback_len;
+	u8 *vendor_ht_cap;
+	u8 vendor_ht_cap_len;
 };
 
 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;

src/common/ieee802_11_defs.h

@@ -578,4 +578,9 @@ struct mimo_pwr_save_action {
 #define WME_TSPEC_DIRECTION_DOWNLINK 1
 #define WME_TSPEC_DIRECTION_BI_DIRECTIONAL 3
 
+
+#define OUI_BROADCOM 0x00904c /* Broadcom (Epigram) */
+
+#define VENDOR_HT_CAPAB_OUI_TYPE 0x33 /* 00-90-4c:0x33 */
+
 #endif /* IEEE802_11_DEFS_H */