diff -r df526e27b5b1 -r ba9081dbe0ee src/wifi/test/interference-helper-tx-duration-test.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/wifi/test/interference-helper-tx-duration-test.cc	Fri Mar 25 10:16:24 2011 -0700
@@ -0,0 +1,197 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2009 CTTC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as 
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Nicola Baldo <nbaldo@cttc.es>
+ */
+
+#include <ns3/object.h>
+#include <ns3/log.h>
+#include <ns3/test.h>
+#include <iostream>
+#include "ns3/interference-helper.h"
+#include "ns3/wifi-phy.h"
+
+NS_LOG_COMPONENT_DEFINE ("InterferenceHelperTxDurationTest");
+
+namespace ns3 {
+
+class InterferenceHelperTxDurationTest : public TestCase 
+{
+public:
+  InterferenceHelperTxDurationTest ();
+  virtual ~InterferenceHelperTxDurationTest ();
+  virtual void DoRun (void);
+
+private:
+
+  /** 
+   * Check if the payload tx duration returned by InterferenceHelper
+   * corresponds to a known value of the pay
+   * 
+   * @param size size of payload in octets (includes everything after the PLCP header)
+   * @param payloadMode the WifiMode used 
+   * @param knownPlcpLengthFieldValue the known value of the Length field in the PLCP header
+   * 
+   * @return true if values correspond, false otherwise
+   */
+  bool CheckPayloadDuration(uint32_t size, WifiMode payloadMode,  uint32_t knownDurationMicroSeconds);
+
+  /** 
+   * Check if the overall tx duration returned by InterferenceHelper
+   * corresponds to a known value of the pay
+   * 
+   * @param size size of payload in octets (includes everything after the PLCP header)
+   * @param payloadMode the WifiMode used 
+   * @param preamble the WifiPreamble used
+   * @param knownPlcpLengthFieldValue the known value of the Length field in the PLCP header
+   * 
+   * @return true if values correspond, false otherwise
+   */
+  bool CheckTxDuration(uint32_t size, WifiMode payloadMode,  WifiPreamble preamble, uint32_t knownDurationMicroSeconds);
+  
+};
+
+
+InterferenceHelperTxDurationTest::InterferenceHelperTxDurationTest ()
+  : TestCase ("InterferenceHelper TX Duration")
+{
+}
+
+
+InterferenceHelperTxDurationTest::~InterferenceHelperTxDurationTest ()
+{
+}
+
+bool
+InterferenceHelperTxDurationTest::CheckPayloadDuration(uint32_t size, WifiMode payloadMode, uint32_t knownDurationMicroSeconds)
+{
+  uint32_t calculatedDurationMicroSeconds = InterferenceHelper::GetPayloadDurationMicroSeconds (size, payloadMode);  
+  if (calculatedDurationMicroSeconds != knownDurationMicroSeconds)
+    {
+      std::cerr << " size=" << size
+                << " mode=" << payloadMode 
+                << " known=" << knownDurationMicroSeconds
+                << " calculated=" << calculatedDurationMicroSeconds
+                << std::endl;
+      return false;
+    }
+  return true;
+}
+
+bool
+InterferenceHelperTxDurationTest::CheckTxDuration(uint32_t size, WifiMode payloadMode, WifiPreamble preamble, uint32_t knownDurationMicroSeconds)
+{
+  uint32_t calculatedDurationMicroSeconds = InterferenceHelper::CalculateTxDuration (size, payloadMode, preamble).GetMicroSeconds ();  
+  if (calculatedDurationMicroSeconds != knownDurationMicroSeconds)
+    {
+      std::cerr << " size=" << size
+                << " mode=" << payloadMode 
+                << " preamble=" << preamble
+                << " known=" << knownDurationMicroSeconds
+                << " calculated=" << calculatedDurationMicroSeconds
+                << std::endl;
+      return false;
+    }
+  return true;
+}
+
+void
+InterferenceHelperTxDurationTest::DoRun (void)
+{
+  bool retval = true;
+
+  // IEEE Std 802.11-2007 Table 18-2 "Example of LENGTH calculations for CCK"
+  retval = retval
+    && CheckPayloadDuration (1023, WifiPhy::GetDsssRate11Mbps (), 744)
+    && CheckPayloadDuration (1024, WifiPhy::GetDsssRate11Mbps (), 745)
+    && CheckPayloadDuration (1025, WifiPhy::GetDsssRate11Mbps (), 746)
+    && CheckPayloadDuration (1026, WifiPhy::GetDsssRate11Mbps (), 747);
+
+
+  // Similar, but we add PLCP preamble and header durations
+  // and we test different rates.
+  // The payload durations for modes other than 11mbb have been
+  // calculated by hand according to  IEEE Std 802.11-2007 18.2.3.5 
+  retval = retval
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 744 + 96)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 745 + 96)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 746 + 96)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_SHORT, 747 + 96)
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 744 + 192)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 745 + 192)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 746 + 192)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 747 + 192)
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1488 + 96)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1490 + 96)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1491 + 96)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_SHORT, 1493 + 96)
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1488 + 192)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1490 + 192)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1491 + 192)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate5_5Mbps (), WIFI_PREAMBLE_LONG, 1493 + 192)
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4092 + 96)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4096 + 96)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4100 + 96)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_SHORT, 4104 + 96)
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4092 + 192)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4096 + 192)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4100 + 192)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate2Mbps (), WIFI_PREAMBLE_LONG, 4104 + 192)
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8184 + 96)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8192 + 96)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8200 + 96)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_SHORT, 8208 + 96)
+    && CheckTxDuration (1023, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8184 + 192)
+    && CheckTxDuration (1024, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8192 + 192)
+    && CheckTxDuration (1025, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8200 + 192)
+    && CheckTxDuration (1026, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 8208 + 192);
+
+  // values from http://mailman.isi.edu/pipermail/ns-developers/2009-July/006226.html
+  retval = retval && CheckTxDuration (14, WifiPhy::GetDsssRate1Mbps (), WIFI_PREAMBLE_LONG, 304);
+
+  // values from
+  // http://www.oreillynet.com/pub/a/wireless/2003/08/08/wireless_throughput.html
+  retval = retval 
+    && CheckTxDuration (1536, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 1310)
+    && CheckTxDuration (76, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 248)
+    && CheckTxDuration (14, WifiPhy::GetDsssRate11Mbps (), WIFI_PREAMBLE_LONG, 203)
+    && CheckTxDuration (1536, WifiPhy::GetOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 248)
+    && CheckTxDuration (76, WifiPhy::GetOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 32)
+    && CheckTxDuration (14, WifiPhy::GetOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 24);
+
+  // 802.11g durations are same as 802.11a durations but with 6 us signal extension
+  retval = retval
+    && CheckTxDuration (1536, WifiPhy::GetErpOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 254)
+    && CheckTxDuration (76, WifiPhy::GetErpOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 38)
+    && CheckTxDuration (14, WifiPhy::GetErpOfdmRate54Mbps (), WIFI_PREAMBLE_LONG, 30);
+}
+
+class TxDurationTestSuite : public TestSuite
+{
+public:
+  TxDurationTestSuite ();
+};
+
+TxDurationTestSuite::TxDurationTestSuite ()
+  : TestSuite ("devices-wifi-tx-duration", UNIT)
+{
+  AddTestCase (new InterferenceHelperTxDurationTest);
+}
+
+static TxDurationTestSuite g_txDurationTestSuite;
+} //namespace ns3 
+