Right sizing MACAddress buffers

Author: sharadb-amazon

examples/tv-casting-app/android/App/app/src/main/jni/com/chip/casting/NsdResolveListener.java

@@ -143,13 +143,13 @@ private boolean isPassingDeviceTypeFilter(DiscoveredNodeData discoveredNodeData)
 
   private void addCommissioningInfo(DiscoveredNodeData discoveredNodeData) {
     if (preCommissionedVideoPlayers != null) {
+      long currentUnixTimeMS = System.currentTimeMillis();
       for (VideoPlayer videoPlayer : preCommissionedVideoPlayers) {
         if (videoPlayer.isSameAs(discoveredNodeData)) {
           Log.d(
               TAG,
               "Matching Video Player with the following information found for DiscoveredNodeData"
                   + videoPlayer);
-          long currentUnixTimeMS = System.currentTimeMillis();
           Log.d(TAG, "Updating discovery timestamp for VideoPlayer to " + currentUnixTimeMS);
           videoPlayer.setLastDiscoveredMs(currentUnixTimeMS);
           discoveredNodeData.setConnectableVideoPlayer(videoPlayer);

examples/tv-casting-app/android/App/app/src/main/jni/cpp/ConversionUtils.cpp

@@ -183,7 +183,7 @@ CHIP_ERROR convertJVideoPlayerToTargetVideoPlayerInfo(jobject videoPlayer, Targe
 
     if (MACAddress != nullptr)
     {
-        chip::CharSpan MACAddressSpan(MACAddress, strlen(MACAddress) - 1);
+        chip::CharSpan MACAddressSpan(MACAddress, 2 * 2 * chip::DeviceLayer::ConfigurationManager::kPrimaryMACAddressLength);
         outTargetVideoPlayerInfo.SetMACAddress(MACAddressSpan);
     }
 
@@ -257,9 +257,9 @@ CHIP_ERROR convertTargetVideoPlayerInfoToJVideoPlayer(TargetVideoPlayerInfo * ta
         jstring MACAddress = nullptr;
         if (targetVideoPlayerInfo->GetMACAddress() != nullptr && targetVideoPlayerInfo->GetMACAddress()->data() != nullptr)
         {
-            char MACAddressWithNil[2 * chip::DeviceLayer::ConfigurationManager::kMaxMACAddressLength + 1];
-            strncpy(MACAddressWithNil, targetVideoPlayerInfo->GetMACAddress()->data(),
-                    targetVideoPlayerInfo->GetMACAddress()->size());
+            char MACAddressWithNil[2 * chip::DeviceLayer::ConfigurationManager::kPrimaryMACAddressLength + 1];
+            memcpy(MACAddressWithNil, targetVideoPlayerInfo->GetMACAddress()->data(),
+                   targetVideoPlayerInfo->GetMACAddress()->size());
             MACAddressWithNil[targetVideoPlayerInfo->GetMACAddress()->size()] = '\0';
             MACAddress                                                        = env->NewStringUTF(MACAddressWithNil);
         }

examples/tv-casting-app/tv-casting-common/include/TargetVideoPlayerInfo.h

@@ -95,8 +95,8 @@ class TargetVideoPlayerInfo
     bool IsAsleep() { return mIsAsleep; }
     void SetMACAddress(chip::CharSpan MACAddress)
     {
-        memcpy(mMACAddressBuf, MACAddress.data(), MACAddress.size());
-        mMACAddress = chip::CharSpan(mMACAddressBuf, MACAddress.size());
+        memcpy(mMACAddressBuf, MACAddress.data(), sizeof(mMACAddressBuf));
+        mMACAddress = chip::CharSpan(mMACAddressBuf, sizeof(mMACAddressBuf));
     }
     chip::System::Clock::Timestamp GetLastDiscovered() { return mLastDiscovered; }
     void SetLastDiscovered(chip::System::Clock::Timestamp lastDiscovered) { mLastDiscovered = lastDiscovered; }
@@ -106,7 +106,7 @@ class TargetVideoPlayerInfo
         // it was recently discoverable if its mLastDiscovered.count is within
         // CHIP_DEVICE_CONFIG_STR_CACHE_LAST_DISCOVERED_HOURS of current time
         chip::System::Clock::Timestamp currentUnixTimeMS = chip::System::Clock::kZero;
-        chip::System::SystemClock().GetClock_RealTimeMS(currentUnixTimeMS);
+        VerifyOrReturnValue(chip::System::SystemClock().GetClock_RealTimeMS(currentUnixTimeMS) == CHIP_NO_ERROR, true);
         ChipLogProgress(AppServer, "WasRecentlyDiscoverable currentUnixTimeMS: %lu mLastDiscovered: %lu",
                         static_cast<unsigned long>(currentUnixTimeMS.count()), static_cast<unsigned long>(mLastDiscovered.count()));
         return mLastDiscovered.count() >
@@ -211,7 +211,7 @@ class TargetVideoPlayerInfo
     char mInstanceName[chip::Dnssd::Commission::kInstanceNameMaxLength + 1];
     uint16_t mPort;
     chip::CharSpan mMACAddress;
-    char mMACAddressBuf[2 * chip::DeviceLayer::ConfigurationManager::kMaxMACAddressLength];
+    char mMACAddressBuf[2 * chip::DeviceLayer::ConfigurationManager::kPrimaryMACAddressLength];
     chip::System::Clock::Timestamp mLastDiscovered;
     bool mIsAsleep    = false;
     bool mInitialized = false;

examples/tv-casting-app/tv-casting-common/src/PersistenceManager.cpp

@@ -267,11 +267,11 @@ CHIP_ERROR PersistenceManager::ReadAllVideoPlayers(TargetVideoPlayerInfo outVide
     char hostName[chip::Dnssd::kHostNameMaxLength + 1]  = {};
     size_t numIPs                                       = 0;
     Inet::IPAddress ipAddress[chip::Dnssd::CommonResolutionData::kMaxIPAddresses];
-    uint64_t lastDiscoveredMs                                                             = 0;
-    char MACAddressBuf[2 * chip::DeviceLayer::ConfigurationManager::kMaxMACAddressLength] = {};
-    uint32_t MACAddressLength                                                             = 0;
-    char instanceName[chip::Dnssd::Commission::kInstanceNameMaxLength + 1]                = {};
-    uint16_t port                                                                         = 0;
+    uint64_t lastDiscoveredMs                                                                 = 0;
+    char MACAddressBuf[2 * chip::DeviceLayer::ConfigurationManager::kPrimaryMACAddressLength] = {};
+    uint32_t MACAddressLength                                                                 = 0;
+    char instanceName[chip::Dnssd::Commission::kInstanceNameMaxLength + 1]                    = {};
+    uint16_t port                                                                             = 0;
 
     CHIP_ERROR err;
     while ((err = reader.Next()) == CHIP_NO_ERROR)
@@ -349,7 +349,7 @@ CHIP_ERROR PersistenceManager::ReadAllVideoPlayers(TargetVideoPlayerInfo outVide
         {
             MACAddressLength = reader.GetLength();
             ReturnErrorOnFailure(reader.GetBytes(reinterpret_cast<uint8_t *>(MACAddressBuf),
-                                                 2 * chip::DeviceLayer::ConfigurationManager::kMaxMACAddressLength));
+                                                 2 * chip::DeviceLayer::ConfigurationManager::kPrimaryMACAddressLength));
             continue;
         }