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You can see that the manufacturer s code for Nokia2 is 00E003. Now go back and look at Figure 9.6. The highlighted cell phone s Bluetooth adapter has the MAC address 00:E0:03:53:4B:71. In this twelve-digit code, the first six characters identify the manufacturer and the rest are unique to the device. Assuming the first twelve characters would leave the RedFang utility having to guess only the last six characters half the work is already done. Think about the Motorola Razr from our earlier examples. RedFang will scan a number of MAC addresses. If the Mac address of the Motorola Razr happens to be in the range that is scanned, the device can be discovered, regardless of whether it is in discoverable mode. Figure 9.9 shows the results of running RedFang on the Razr.

Each handler provides an operation invoke that implements the handler s task This operation is invoked whenever a message passes the handler in the chain A message can pass a handler either as a request or a reply, both on the client side and the server side That is, the REQUESTOR passes each request message through the client-side.

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parenthesis, you can tell that a call to Item is generated automatically when you put a nonempty parameter list after Workspaces As a general rule, your code's speed is inversely proportional to the number of bound calls you make There are several things you can do to reduce the number of bound calls you force the compiler to make Don't hesitate to cache results in local variables Behind the scenes, VB creates hidden locals for you for holding the return values of method and property calls You might as well hang onto the values and use them again The following code snippets select all the text in Text1 The snippets accomplish the same thing, but the second snippet binds to Text1 only once Although you don't gain anything for one call, it eliminates n-1 calls to the Text1 function if you set n properties on the Text1 object 'Use Text1 for each call Text1SelStart = 0 Text1SelLength = &HFFFF& 'Use a local variable Dim txtTmp As TextBox Set txtTmp = Text1 txtTmpSelStart = 0 txtTmpSelLength = &HFFFF& Remember that using a With statement against an object is equivalent to assigning the object a local variable With statements offer many other benefits: You don't have to declare the variable, you have less code to type, and the code is nicely organized If you access application objects in a With statement, you eliminate all but one of the extra implicit Is Nothing checks and method calls that happen implicitly when you use the method name directly The one disadvantage of a With statement is that you can have only one active With context at a time With App Title = "I'm Back"

Once a Bluetooth-enabled cell phone has been found, what can actually be done Quite a lot. Take a look at some popular Bluetooth attack methods and utilities:

Web Services Technology Projection handlers until the last handler in the chain is reached. This last handler (called a sender in Axis) hands the message to the CLIENT REQUEST HANDLER, which sends the request across the network. On the server side the SERVER REQUEST HANDLER receives the request message and passes it through the server handler chain until the INVOKER (called a provider in Axis) is reached. The provider actually invokes the Web Services remote object. After the remote object has returned, the provider turns the request into either a reply or a REMOTING ERROR. The reply is passed in reverse order through the respective handler chains first on the server side and then on the client side. Many different providers are implemented in Axis, including a Java provider, a CORBA provider, an EJB provider, a JMS Messaging provider, an RMI provider, and others. These providers are responsible for looking up the target object and invoking the target operation, after they have checked that it is allowed to invoke it, according to the deployment descriptor. Thus the provider abstraction supports heterogeneity for the implementation of Web Services remote objects.

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Invoker (Provider)

BlueSpam This utility runs on the Palm OS and is also used for sending unsolicited messages to users. It looks for Bluetooth devices in discoverable mode and if they are found, it attempts to send them a message. Either the default canned message or a customized message or image can be sent. Figures 9.10 and 9.11 show BlueSpam in action.

In the above figure, we can see an example of how the CLIENT PROXY invokes the chain of handlers with a request. After the client-side

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