Minor fixes in TCP Disconnect.

Use the member PeerAddress in the ActiveConnection object to compare
with the passed PeerAddress instead of calling GetPeerInfo() from
TCPEndPoint.

Log the connection closure in the CloseConnectionInternal function
which is also called by CloseActiveConnections() from the TCPBase
destructor.

src/transport/raw/TCP.cpp

@@ -398,6 +398,10 @@ void TCPBase::CloseConnectionInternal(ActiveTCPConnectionState * connection, CHI
 
     if (connection->mConnectionState != TCPState::kClosed && connection->mEndPoint)
     {
+        char addrStr[Transport::PeerAddress::kMaxToStringSize];
+        connection->mPeerAddr.ToString(addrStr);
+        ChipLogProgress(Inet, "Closing connection with peer %s.", addrStr);
+
         if (err == CHIP_NO_ERROR)
         {
             connection->mEndPoint->Close();
@@ -616,36 +620,17 @@ CHIP_ERROR TCPBase::TCPConnect(const PeerAddress & address, Transport::AppTCPCon
 
 void TCPBase::TCPDisconnect(const PeerAddress & address)
 {
-    CHIP_ERROR err = CHIP_NO_ERROR;
     // Closes an existing connection
     for (size_t i = 0; i < mActiveConnectionsSize; i++)
     {
         if (mActiveConnections[i].IsConnected())
         {
-            Inet::IPAddress ipAddress;
-            uint16_t port;
-            Inet::InterfaceId interfaceId;
+            const Inet::IPAddress & ipAddress = mActiveConnections[i].mPeerAddr.GetIPAddress();
+            uint16_t port = mActiveConnections[i].mPeerAddr.GetPort();
 
-            err = mActiveConnections[i].mEndPoint->GetPeerInfo(&ipAddress, &port);
-            if (err != CHIP_NO_ERROR)
-            {
-                ChipLogError(Inet, "TCPDisconnect: GetPeerInfo error: %" CHIP_ERROR_FORMAT, err.Format());
-                return;
-            }
-
-            err = mActiveConnections[i].mEndPoint->GetInterfaceId(&interfaceId);
-            if (err != CHIP_NO_ERROR)
-            {
-                ChipLogError(Inet, "TCPDisconnect: GetInterfaceId error: %" CHIP_ERROR_FORMAT, err.Format());
-                return;
-            }
             // if (address == PeerAddress::TCP(ipAddress, port, interfaceId))
             if (ipAddress == address.GetIPAddress() && port == address.GetPort())
             {
-                char addrStr[Transport::PeerAddress::kMaxToStringSize];
-                address.ToString(addrStr);
-                ChipLogProgress(Inet, "Disconnecting with peer %s.", addrStr);
-
                 // NOTE: this leaves the socket in TIME_WAIT.
                 // Calling Abort() would clean it since SO_LINGER would be set to 0,
                 // however this seems not to be useful.