From 4705aa9f3b8d54abf44585e9c4f0c6e56a62ee0b Mon Sep 17 00:00:00 2001
From: Stefano Avallone <stavallo@unina.it>
Date: Fri, 7 Oct 2022 17:09:18 +0200
Subject: [PATCH] wifi: Remove unused GetChannelWidthForTransmission functions

---
 src/wifi/model/wifi-phy-common.cc | 32 -------------------------------
 src/wifi/model/wifi-phy-common.h  | 25 ------------------------
 2 files changed, 57 deletions(-)

diff --git a/src/wifi/model/wifi-phy-common.cc b/src/wifi/model/wifi-phy-common.cc
index 3784ff167..6253fa942 100644
--- a/src/wifi/model/wifi-phy-common.cc
+++ b/src/wifi/model/wifi-phy-common.cc
@@ -70,38 +70,6 @@ ConvertGuardIntervalToNanoSeconds(WifiMode mode, bool htShortGuardInterval, Time
     return gi;
 }
 
-uint16_t
-GetChannelWidthForTransmission(WifiMode mode, uint16_t maxAllowedChannelWidth)
-{
-    WifiModulationClass modulationClass = mode.GetModulationClass();
-    if (maxAllowedChannelWidth > 20 &&
-        (modulationClass == WifiModulationClass::WIFI_MOD_CLASS_OFDM // all non-HT OFDM control and
-                                                                     // management frames
-         || modulationClass ==
-                WifiModulationClass::WIFI_MOD_CLASS_ERP_OFDM)) // special case of beacons at 2.4 GHz
-    {
-        return 20;
-    }
-    // at 2.4 GHz basic rate can be non-ERP DSSS
-    if (modulationClass == WifiModulationClass::WIFI_MOD_CLASS_DSSS ||
-        modulationClass == WifiModulationClass::WIFI_MOD_CLASS_HR_DSSS)
-    {
-        return 22;
-    }
-    return maxAllowedChannelWidth;
-}
-
-uint16_t
-GetChannelWidthForTransmission(WifiMode mode,
-                               uint16_t operatingChannelWidth,
-                               uint16_t maxSupportedChannelWidth)
-{
-    return GetChannelWidthForTransmission(mode,
-                                          (operatingChannelWidth < maxSupportedChannelWidth)
-                                              ? operatingChannelWidth
-                                              : maxSupportedChannelWidth);
-}
-
 WifiPreamble
 GetPreambleForTransmission(WifiModulationClass modulation, bool useShortPreamble)
 {
diff --git a/src/wifi/model/wifi-phy-common.h b/src/wifi/model/wifi-phy-common.h
index d7111a07c..6b043fd3e 100644
--- a/src/wifi/model/wifi-phy-common.h
+++ b/src/wifi/model/wifi-phy-common.h
@@ -475,31 +475,6 @@ uint16_t ConvertGuardIntervalToNanoSeconds(WifiMode mode,
  */
 WifiPreamble GetPreambleForTransmission(WifiModulationClass modulation, bool useShortPreamble);
 
-/**
- * Return the channel width that is allowed based on the selected mode and the given
- * maximum channel width. This is especially useful when using non-HT modes with
- * HT/VHT/HE capable stations (with default width above 20 MHz).
- *
- * \param mode selected WifiMode
- * \param maxAllowedChannelWidth maximum channel width allowed for the transmission
- * \return channel width adapted to the selected mode
- */
-uint16_t GetChannelWidthForTransmission(WifiMode mode, uint16_t maxAllowedChannelWidth);
-/**
- * Return the channel width that is allowed based on the selected mode, the current
- * width of the operating channel and the maximum channel width supported by the
- * receiver. This is especially useful when using non-HT modes with HT/VHT/HE
- * capable stations (with default width above 20 MHz).
- *
- * \param mode selected WifiMode
- * \param operatingChannelWidth operating channel width
- * \param maxSupportedChannelWidth maximum channel width supported by the receiver
- * \return channel width adapted to the selected mode
- */
-uint16_t GetChannelWidthForTransmission(WifiMode mode,
-                                        uint16_t operatingChannelWidth,
-                                        uint16_t maxSupportedChannelWidth);
-
 /**
  * Return whether the modulation class of the selected mode for the
  * control answer frame is allowed.