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<concept id="GUID-AB40C087-F5AF-5D73-82ED-B89BA2B702B9" xml:lang="en"><title>OBEX

MTM Overview</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>OBEX MTM offers simple Infrared (IR) and Bluetooth beaming functionality.

Client applications can use the API to send one or more objects (attachments)

using IR or Bluetooth. </p>

<section><title>Key concepts and terms</title> <dl>

<dlentry>

<dt>IR</dt>

<dd><p>The exchange of data on infrared system. </p> </dd>

</dlentry>

<dlentry>

<dt>Bluetooth</dt>

<dd><p>A short-range radio communications technology, standardised by the

Bluetooth Special Interest Group (SIG) in the form of the Bluetooth specification. </p> </dd>

</dlentry>

</dl> </section>

<section><title>Architecture</title> <p>The Messaging Middleware architecture

defines a framework in which modules (MTMs) can be implemented that provide

support for particular messaging protocols. The OBEX MTM component includes

the Bluetooth and Infrared beaming MTMs. The functionality provided by OBEX

MTM is generic to both of the underlying transports. To use the OBEX MTM it

is necessary to use either the IR or Bluetooth MTM. </p> <p>The OBEX API provides

client MTMs for IR and Bluetooth MTMs and supporting utilities. </p> </section>

<section><title>Description</title> <p>The OBEX MTM has three components:

OBEX MTM DLLs, IR MTM DLLs and Bluetooth MTM DLLs. </p><note> he OBEX MTM

DLLs cannot be used on their own, as they provide the base OBEX MTM functionality

for the derived IR and Bluetooth MTMs.</note> <p><b>OBEX MTM</b> </p> <p>The

OBEX MTM provides the ability to send one or more objects (attachments) using

one of the two underlying transports (IR or Bluetooth). No receiving capability

is provided by the MTM. In order to receive OBEX messages it is necessary

to use the underlying OBEX transport APIs directly. </p> <p>The SendAs interface

is supported for the construction of messages. An additional API is provided

for sending attachments without the need to create a copy of the attachment

in the message store. Unlike many other MTMs, after OBEX tries to send a message,

the message is deleted from the outbox whether the sending succeeds or fails. </p> <fig id="GUID-251B613E-3FF9-5219-A9FA-F6D82B77979D">

<title>                 OBEX MTM class diagram               </title>

<image href="GUID-A7EDCB44-9E73-5FD9-B6FB-AE0BAFDC1213_d0e473645_href.jpg" placement="inline"/>

</fig> <p><b>IR MTM</b> </p> <p>The generic OBEX MTM functionality is provided

by the OBEX MTM DLLs, the IR MTM itself just sets up the parameters. The IR

MTM supports non-standard OBEX transfer to maintain compatibility with older

versions of Microsoft Windows, for example, Windows 98. The non-standard OBEX

transfer is attempted only if the standard OBEX transfer has failed. </p> <p><b>Bluetooth

MTM</b> </p> <p>The generic OBEX MTM functionality is provided by the OBEX

MTM DLLs, the Bluetooth MTM just subclasses from the OBEX MTM and sets up

Bluetooth specific parameters. </p> <p><b>OBEX MTM Utilities</b> </p> <p>The

OBEX MTM Utilities provide utility functionality used by the other OBEX MTM

DLLs. The following are the two main areas of functionality provided by this

component: </p> <ul>

<li id="GUID-38D310E8-E333-5963-BD21-9EF5E6C0EF0D"><p>Filename linking functionality </p> <p>The

filename linking functionality is provided in the utilities library, because

linked files must be added by the client side during message creation and

need to be read on the server-side during sending messages. </p> </li>

<li id="GUID-415DCBE3-376A-57AE-A0AA-7E244D46831A"><p>Bluetooth SDP lookup </p> <p>The

Bluetooth MTM performs the required SDP lookup prior to sending the message.

The address of the recipient device can be set on the outgoing message by

the UI. </p> </li>

</ul> </section>

<section><title>API summary</title> <p>The following client APIs are provided

by the OBEX MTM component. </p> <table id="GUID-394ED37D-47F6-5537-9B4A-B5B77CEA27A9">

<tgroup cols="2"><colspec colname="col0"/><colspec colname="col1"/>

<thead>

<row>

<entry>API</entry>

<entry>Description</entry>

</row>

</thead>

<tbody>

<row>

<entry><p> <xref href="GUID-453AF29D-0B38-3903-A4CF-883A22551F75.dita"><apiname>CBtClientMtm</apiname></xref>  </p> </entry>

<entry><p>Provides client-side functionality for Bluetooth messaging. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-1705A724-0A38-30BE-9277-A208F62EEEB7.dita"><apiname>CIrClientMtm</apiname></xref>  </p> </entry>

<entry><p>Provides client-side functionality for IR messaging. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-F4577312-35AC-32DE-AE0E-45BB0E0A761F.dita"><apiname>CObexHeaderList</apiname></xref>  </p> </entry>

<entry><p>Encapsulates and owns a list of <xref href="GUID-3D2D218E-4BA7-38A5-8B2C-FC178802C81F.dita"><apiname>CObexHeader</apiname></xref> objects. </p> </entry>

</row>

</tbody>

</tgroup>

</table> </section>

<section><title>Typical uses</title> <p>Client applications can use the API

to send one or more objects (attachments) using IR or Bluetooth. </p> </section>

</conbody><related-links>

<link href="GUID-8B843382-D27A-5E36-8F60-304903F3AA41.dita"><linktext>Message Type

Module</linktext></link>

<link href="GUID-99BD7331-D82A-5A2E-B2E4-314AD3FF38B7.dita"><linktext>GMXML</linktext>

</link>

</related-links></concept>