<!-- Module Developer's Guide -->

<chapter>
	
	<title>&develguide;</title>
	<section>
	<title>Available Functions</title>

	<section>
		<title>
		<function moreinfo="none">register_qoscb (qos, type, cb, param)</function>
		</title>
		<para>Register a new callback to the qos.</para>
		<para>Meaning of the parameters is as follows:</para>
		<itemizedlist>
		<listitem>
			<para><emphasis>struct qos_ctx_st* qos</emphasis> - qos to 
			register callback to. If maybe NULL only for QOSCB_CREATED callback
			type, which is not a per qos type.
			</para>
		</listitem>
		<listitem>
			<para><emphasis>int type</emphasis> - types of callbacks; more
			types may be register for the same callback function; only 
			QOSCB_CREATED must be register alone. Possible types:
			<itemizedlist>
			<listitem>
				<para><emphasis>QOSCB_CREATED</emphasis> - called when a new 
				qos context is created - it's a global type (not associated to 
				any qos).
				</para>
			</listitem>
			<listitem>
				<para><emphasis>QOSCB_ADD_SDP</emphasis> - called when a new SDP
				was added to the qos context - it's a per qos type.
				</para>
			</listitem>
			<listitem>
				<para><emphasis>QOSCB_UPDATE_SDP</emphasis> - called when an
				existing SDP is updated - it's a per qos type.
				</para>
			</listitem>
			<listitem>
				<para><emphasis>QOSCB_REMOVE_SDP</emphasis> - called when an 
				existing SDP is removed - it's a per qos type.
				</para>
			</listitem>
			<listitem>
				<para><emphasis>QOSCB_TERMINATED</emphasis> - called when the 
				qos is terminated.
				</para>
			</listitem>
			</itemizedlist>
			</para>
		</listitem>
		<listitem>
			<para><emphasis>qos_cb cb</emphasis> - callback function to be 
			called. Prototype is: <quote>void (qos_cb) 
			(struct qos_ctx_st *qos, int type, struct qos_cb_params *params);
			</quote>
			</para>
		</listitem>
		<listitem>
			<para><emphasis>void *param</emphasis> - parameter to be passed to
			the callback function.
			</para>
		</listitem>
		</itemizedlist>
	</section>

	</section>

</chapter>

