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<title>rapi_sender()--Identify a RAPI sender</title>
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<h2>rapi_sender()--Identify a RAPI sender</h2>
<div class="box" style="width: 60%;">
<br>
&nbsp;&nbsp;Syntax<br>
<pre>
#include &lt;rapi.h&gt;<br>
int rapi_sender (
rapi_sid_t SessID,
int flags,
rapi_addr_t *LocalAddr,
rapi_filter_t *Filter,
rapi_tspec_t *SndTspec,
rapi_adspec_t *SndAdspec,
rapi_policy_t *SndPol,
int Ttl )
</pre>
<br>
&nbsp;&nbsp;Service program name: QSYS/QTOQRAPI<br>
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<br>
&nbsp;&nbsp;Default public authority: *EXCLUDE<br>
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<br>
&nbsp;&nbsp;Threadsafe: Yes<br>
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<br>
</div>
<p>The <strong>rapi_sender()</strong> API identifies an RSVP sender to
potential receivers of the data. This API causes an RSVP path message to be
sent to the receiver defined by the SessID value obtained by a
<strong>rapi_session</strong> call.</p>
<br>
<h3>Parameters</h3>
<dl>
<dt><strong><em>SessID</em></strong></dt>
<dd>(Input) Required<br>
The session ID returned by a successful <strong>rapi_session()</strong> call. A
session ID that is not valid will cause the API to fail.<br>
<br>
</dd>
<dt><strong><em>flags</em></strong></dt>
<dd>(Input) Required<br>
Either a zero or the following flags may be used.<br>
<br>
<table cellpadding="5">
<!-- cols="5 20 75" -->
<tr>
<td align="left" valign="top">2</td>
<td align="left" valign="top">TC_QOS_POLICE</td>
<td align="left" valign="top">Turn traffic policing on.</td>
</tr>
<tr>
<td align="left" valign="top">4</td>
<td align="left" valign="top">TC_QOS_NOPOLICE</td>
<td align="left" valign="top">Turn traffic policing off.</td>
</tr>
<tr>
<td align="left" valign="top">8</td>
<td align="left" valign="top">TC_QOS_SHAPE</td>
<td align="left" valign="top">Turn traffic shaping on.</td>
</tr>
<tr>
<td align="left" valign="top">16</td>
<td align="left" valign="top">TC_QOS_NOSHAPE</td>
<td align="left" valign="top">Turn traffic shaping off.</td>
</tr>
</table>
<br>
</dd>
<dt><strong><em>LocalAddr</em></strong></dt>
<dd>(Input) Optional<br>
A pointer to a rapi_addr_t structure defining the IP source address and, if
needed, the source port or flow label from which data will be sent. It is set
to NULL if not used. The format of a rapi_addr_t is
implementation-dependent.<br>
<br>
</dd>
<dt><strong><em>Filter</em></strong></dt>
<dd>(Input) Optional<br>
A pointer to a RAPI filter spec structure defining the format of the data
packets to be sent. It is set to NULL if not used. If this parameter is NULL, a
sender template is created internally from the <em>Dest</em> and
<em>LocalAddr</em> parameters. The <em>Dest</em> parameter was provided as part
of the <strong>rapi_session()</strong> call. If the <em>Filter</em> parameter
is present, the <em>LocalAddr</em> parameter is ignored.<br>
<br>
<p>If the session is using IPSEC, this parameter is required.</p>
</dd>
<dt><strong><em>SndTspec</em></strong></dt>
<dd>(Input) Required<br>
A pointer to a Tspec that defines the traffic this sender will create.<br>
<br>
</dd>
<dt><strong><em>SndAdspec</em></strong></dt>
<dd>(Input) Optional<br>
A pointer to a RAPI Adspec structure. It is set to NULL if not used.<br>
<br>
</dd>
<dt><strong><em>SndPol</em></strong></dt>
<dd>(Input) Optional<br>
A pointer to a sender policy data structure. It is set to NULL if not used.<br>
<br>
</dd>
<dt><strong><em>Ttl</em></strong></dt>
<dd>(Input) Required<br>
The IP TTL (Time-to-Live) value for sending multicast data. It allows RSVP to
send its control messages with the same TTL scope as the data packets. It is
set to 0 if not used.</dd>
</dl>
<br>
<h3>Authorities</h3>
<p>None.</p>
<br>
<h3>Return Value</h3>
<p>Returns 0 if successful.</p>
<p>A RAPI error code is returned if it fails.</p>
<br>
<h3>Error Conditions</h3>
<dl>
<dt><em>[RAPI_ERR_INVAL]</em></dt>
<dd><p>A parameter that is not valid was passed to the
API.</p></dd>
<dt><em>[RAPI_ERR_BADSID]</em></dt>
<dd><p>The session ID passed to the API was valid.</p></dd>
<dt><em>[RAPI_ERR_NOTSPEC]</em></dt>
<dd><p>No sender Tspec was defined for the API call.</p></dd>
<dt><em>[RAPI_ERR_NORSVP]</em></dt>
<dd><p>The RSVP server did not respond to the API
request. Make sure the RSVP server is running.</p></dd>
</dl>
<br>
<h3>Usage Notes</h3>
<ol>
<li>The <strong>rapi_session()</strong> API must be called to establish a
session ID to be used with the other RAPI API's.<br><br></li>
<li>The RSVP server must be running before any of the RAPI APIs are
called.<br><br></li>
<li>The formats of the parameter structures are defined in the
&lt;<strong>rapi.h</strong>&gt; header file.</li>
</ol>
<br>
<h3>Related Information</h3>
<p>For a description of the RSVP protocol, see RFC 2205 on the RFC Pages for <a
href="http://www.ietf.org/rfc.html">The Internet Engineering Task
Force</a>.<img src="www.gif" alt="Link outside Information Center"></p>
<p>Complete documentation of the RAPI APIs can be found at <a href=
"http://www.opengroup.org/publications/catalog/c809.htm">The Open
Group</a>.<img src="www.gif" alt="Link outside Information Center"></p>
<br>
<hr>
API introduced: V5R1
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