103 lines
5.8 KiB
HTML
103 lines
5.8 KiB
HTML
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<meta name="DC.Title" content="cwbCO_SetPortLookupMode" />
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<title>cwbCO_SetPortLookupMode</title>
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</head>
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<body id="cwbco_setportlookupmode"><a name="cwbco_setportlookupmode"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1"><span class="apiname">cwbCO_SetPortLookupMode</span></h1>
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<div><div class="section"><h4 class="sectiontitle">Purpose</h4><p>This function sets, for the specified system
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object, how a host server port lookup will be done.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Syntax</h4><pre>
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UINT CWB_ENTRY cwbCO_SetPortLookupMode(
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cwbCO_SysHandle system,
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cwbCO_PortLookupMode mode );</pre>
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</div>
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<div class="section"><h4 class="sectiontitle">Parameters</h4><dl><dt class="dlterm">cwbCO_SysHandle system - input</dt>
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<dd>Handle that previously was returned by <span class="apiname">cwbCO_CreateSystem</span> or <span class="apiname">cwbCO_CreateSystemLike</span>.
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It identifies the iSeries™ system.</dd>
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<dt class="dlterm">cwbCO_PortLookupMode mode - input</dt>
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<dd>Specifies port lookup method. Possible values are: <dl><dt class="dlterm">CWBCO_PORT_LOOKUP_SERVER</dt>
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<dd>Lookup of a host server port will be done by contacting the host (iSeries)
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server mapper each time the connection of a service is to be made when one
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does not yet exist. The server mapper returns the port number that is then
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used to connect to the desired service on the iSeries system.</dd>
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<dt class="dlterm">CWBCO_PORT_LOOKUP_LOCAL</dt>
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<dd>Lookup of a host server port will be done by lookup in the SERVICES file
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on the PC itself.</dd>
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<dt class="dlterm">CWBCO_PORT_LOOKUP_STANDARD</dt>
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<dd>The "standard" port—that set by default for a given host server and in
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use if no one has changed the services table on the iSeries system for that service—will
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be used to connect to the desired service.</dd>
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</dl>
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<p>The latter two modes eliminate the iSeries server mapper connection and
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its associated delay, network traffic, and load on the iSeries system.</p>
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</dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Return Codes</h4><p>The following list shows common return
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values:</p>
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<dl><dt class="dlterm">CWB_OK</dt>
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<dd>Successful completion.</dd>
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<dt class="dlterm">CWB_INVALID_API_HANDLE</dt>
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<dd>Invalid system handle.</dd>
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<dt class="dlterm">CWB_INVALID_PARAMETER</dt>
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<dd>The mode parameter is an invalid value.</dd>
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<dt class="dlterm">CWB_RESTRICTED_BY_POLICY</dt>
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<dd>A policy exists that prohibits the user from changing this value.</dd>
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<dt class="dlterm">CWB_INV_AFTER_SIGNON</dt>
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<dd>Signon has successfully occurred by using the specified system object,
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so this setting no longer may be changed.</dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Usage</h4><p>This API cannot be used after a successful
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signon has occurred for the specified system object. A signon has occurred
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if either <span class="apiname">cwbCO_Signon</span> or <span class="apiname">cwbCO_Connect</span> has
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been called successfully for this system object.</p>
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<p>Use CWBCO_PORT_LOOKUP_SERVER
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to be most certain of the accuracy of the port number for a service; however,
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this requires an extra connection to the server mapper on the iSeries system
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every time a new connection to a service is to be made.</p>
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<p>Use CWBCO_PORT_LOOKUP_STANDARD
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to achieve the best performance, although if the system administrator has
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changed the ports of any iSeries Access host service in the service table
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on that iSeries system,
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this mode will not work.</p>
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<p>Use CWBCO_PORT_LOOKUP_LOCAL for best performance
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when the port for a iSeries Access host service has been changed on the iSeries system
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represented by the system object. For this to work, entries for each host
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service port must be added to a file on the PC named SERVICES. Each such entry
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must contain first the standard name of the host service (for example, "as-rmtcmd"
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without the quotes) followed by spaces and the port number for that service.
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The SERVICES file is located in a subdirectory under the Windows<sup>®</sup> install
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directory called <span class="uicontrol">system32\drivers\etc</span>.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaikcommapilist4.htm" title="Use the APIs to get and set other system object attributes, or determine if the attributes are restricted by policies.">Communications and security: Get and set attribute APIs</a></div>
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</div>
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</div>
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</body>
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</html>
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