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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Mozilla/4.77C-CCK-MCD Caldera Systems OpenLinux [en] (X11; U; Linux 2.4.2 i686) [Netscape]">
<title>OpenSLP Programmers Guide - SLPFindSrvTypes()</title>
</head>
<body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E" alink="#FF0000">
<h2>
SLPFindSrvTypes</h2>
<hr WIDTH="100%">
<h3>
Declaration</h3>
<tt>#include <slp.h></tt>
<p><tt><a href="SLPError.html">SLPError</a> SLPFindSrvTypes( <a href="SLPTypes.html#SLPHandle">SLPHandle</a>
<a href="#hslp">hslp</a>,</tt>
<br><tt>
const char* <a href="#namingauthority">namingauthority</a>,</tt>
<br><tt>
const char* <a href="#scopelist">scopelist</a>,</tt>
<br><tt>
<a href="SLPSrvTypeCallback.html">SLPSrvTypeCallback</a> <a href="#callback">callback</a>,</tt>
<br><tt>
void* <a href="#cookie">cookie</a>)</tt>
<h3>
Description</h3>
The <tt>SLPFindSrvType()</tt> function issues an SLP service type request
for service types in the scopes indicated by the <tt>scopelist</tt>. The
results are returned through the <tt>callback</tt> parameter. The service
types are independent of language locale, but only for services registered
in one of scopes and for the indicated naming authority.
<p>If the <tt>namingauthority</tt> is "*", then results are returned for
all naming authorities. If the naming authority is the empty string, i.e.
"", then the default naming authority, "IANA", is used. "IANA" is not a
valid naming authority name, and it is a <tt><a href="SLPError.html#SLP_PARAMETER_BAD">SLP_PARAMETER_BAD</a></tt>
error to include it explicitly.
<p>The service type names are returned with the naming authority intact.
If the naming authority is the default (i.e. empty string) then it is omitted,
as is the separating ".". Service type names from URLs of the service:
scheme are returned with the "service:" prefix intact.
<h3>
Parameters</h3>
<table BORDER CELLPADDING=5 NOSAVE >
<tr VALIGN=TOP NOSAVE>
<td NOSAVE><a NAME="hslp"></a><tt>hslp</tt></td>
<td NOSAVE>The language specific <tt>SLPHandle</tt> on which to register
the service.</td>
</tr>
<tr VALIGN=TOP NOSAVE>
<td NOSAVE><a NAME="namingauthority"></a><tt>namingauthority</tt></td>
<td NOSAVE>The naming authorities to search. Use "*" for all naming
authorities and the empty string, "", for the default naming authority
(IANA). See <a href="Syntax.html#Service Type">Syntax</a> for more
information on naming authorities.</td>
</tr>
<tr VALIGN=TOP NOSAVE>
<td><a NAME="scopelist"></a><tt>scopelist</tt></td>
<td NOSAVE>A pointer to a comma separated list of scope names. <i>May
be the empty string</i> if you wish to use scopes this machine is configured
for. May not be NULL.</td>
</tr>
<tr VALIGN=TOP NOSAVE>
<td><a NAME="callback"></a><tt>callback</tt></td>
<td NOSAVE>The address of an <tt><a href="SLPSrvTypeCallback.html">SLPSrvTypeCallback</a></tt>
function that will be called to report the operation completion status.
May not be NULL. See <a href="Callbacks.html">Callbacks</a> for more information
on how callbacks are used by the SLPAPI.</td>
</tr>
<tr VALIGN=TOP NOSAVE>
<td NOSAVE><a NAME="cookie"></a><tt>cookie</tt></td>
<td NOSAVE>Pointer to memory that gets passed to the callback code.
May be NULL.</td>
</tr>
</table>
<h3>
Returns</h3>
<table BORDER NOSAVE >
<tr NOSAVE>
<td NOSAVE>SLP_OK</td>
<td>Indicates that the no error occurred during the operation.</td>
</tr>
<tr>
<td>SLP_PARSE_ERROR</td>
<td>The SLP message was rejected by a remote SLP agent. The API returns
this error only when no information was retrieved, and at least one SA
or DA indicated a protocol error. The data supplied through the API may
be malformed or a may have been damaged in transit.</td>
</tr>
<tr>
<td>SLP_AUTHENTICATION_ABSENT</td>
<td>If the SLP framework supports authentication, this error arises when
the UA or SA failed to send an authenticator for requests or registrations.</td>
</tr>
<tr>
<td>SLP_AUTHENTICATION_FAILED</td>
<td>If the SLP framework supports authentication, this error arises when
a authentication on an SLP message failed.</td>
</tr>
<tr>
<td>SLP_NETWORK_TIMED_OUT</td>
<td>When no reply can be obtained in the time specified by the configured
timeout interval for a unicast request, this error is returned. In
other words, slpd is running, but something is wrong with it</td>
</tr>
<tr>
<td>SLP_NETWORK_INIT_FAILED</td>
<td>If the network cannot initialize properly, this error is returned. </td>
</tr>
<tr>
<td>SLP_MEMORY_ALLOC_FAILED </td>
<td>Out of memory error</td>
</tr>
<tr>
<td>SLP_PARAMETER_BAD</td>
<td>If a parameter passed into a function is bad, this error is returned.</td>
</tr>
<tr>
<td>SLP_NETWORK_ERROR</td>
<td>The failure of networking during normal operations causes this error
to be returned. In OpenSLP, this is the error you'll get if an underlying
socket() call failed.</td>
</tr>
<tr>
<td>SLP_INTERNAL_SYSTEM_ERROR</td>
<td>A basic failure of the API causes this error to be returned. This occurs
when a system call or library fails. The operation could not recover.</td>
</tr>
<tr>
<td>SLP_HANDLE_IN_USE</td>
<td>Callback functions are not permitted to recursively call into the API
on the same SLPHandle, either directly or indirectly. If an attempt is
made to do so, this error is returned from the called API function.</td>
</tr>
</table>
<p>If no service types can be found, no error is returned. However,
no calls (other than the SLP_LAST_CALL) will be made to the SLPSrvTypesCallback.
Be aware, especially if the call is async, of error codes that may be passed
to the <tt>SLPSrvTypeCallback</tt> callback function.
<br>
<h3>
Status</h3>
<table CELLPADDING=5 NOSAVE >
<tr VALIGN=TOP NOSAVE>
<td NOSAVE>OpenSLP 0.7.4</td>
<td NOSAVE>Fully implemented as specified by RFC 2614</td>
</tr>
</table>
<h3>
See Also</h3>
<a href="SLPSrvTypeCallback.html">SLPSrvTypeCallback</a>, <a href="Syntax.html">Syntax</a>,
<a href="Callbacks.html">Callbacks</a>
</body>
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