wifi: Extend WifiTxVector to indicate whether the Common field is present in the HE-SIG-B

src/wifi/model/wifi-tx-vector.cc

@@ -583,6 +583,12 @@ WifiTxVector::GetHeMuUserInfoMap()
     return m_muUserInfos;
 }
 
+bool
+WifiTxVector::IsSigBCompression() const
+{
+    return IsDlMuMimo() && !IsDlOfdma();
+}
+
 void
 WifiTxVector::SetInactiveSubchannels(const std::vector<bool>& inactiveSubchannels)
 {

src/wifi/model/wifi-tx-vector.h

@@ -446,6 +446,13 @@ class WifiTxVector
      */
     UserInfoMapOrderedByRus GetUserInfoMapOrderedByRus(uint8_t p20Index) const;
 
+    /**
+     * Indicate whether the Common field is present in the HE-SIG-B field.
+     *
+     * \return true if the Common field is present in the HE-SIG-B, false otherwise
+     */
+    bool IsSigBCompression() const;
+
     /**
      * Set the 20 MHz subchannels that are punctured.
      *