269 lines
6.9 KiB
HTML
269 lines
6.9 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
|
||
|
|
<title>netdir_getbyaddr()--Translate a Netbuf Address to a Host</title>
|
||
|
|
<!-- Begin Header Records ========================================== -->
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<!-- Change History: -->
|
||
|
|
<!-- YYMMDD USERID Change description -->
|
||
|
|
<!-- RPCMST SCRIPT A converted by B2H R4.1 (346) (CMS) by PMHALL at -->
|
||
|
|
<!-- RCHVMW2 on 7 Oct 1998 at 23:43:14 -->
|
||
|
|
<!-- Edited by Kersten Feb 02 -->
|
||
|
|
<!-- End Header Records -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<!-- Java sync-link -->
|
||
|
|
<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<a name="Top_Of_Page"></a>
|
||
|
|
|
||
|
|
<h2>netdir_getbyaddr()--Translate a Netbuf Address to a Host</h2>
|
||
|
|
|
||
|
|
<div class="box" style="width: 70%;">
|
||
|
|
<br>
|
||
|
|
Syntax<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
<pre>
|
||
|
|
#include <netdir.h>
|
||
|
|
|
||
|
|
int netdir_getbyaddr(struct netconfig *nconf,
|
||
|
|
struct nd_hostservlist
|
||
|
|
**service,
|
||
|
|
struct netbuf *netaddr);
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
Service Program Name: QZNFTRPC<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Default Public Authority: *USE<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Threadsafe: No<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>The <strong>netdir_getbyaddr()</strong> function maps addresses into host
|
||
|
|
names and service names.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Parameters</h3>
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><strong>nconf</strong> (Input) </dt>
|
||
|
|
|
||
|
|
<dd>A pointer to a netconfig structure that is returned by either
|
||
|
|
<strong>getnetconfig()</strong> or <strong>getnetconfigent()</strong>.<br><br></dd>
|
||
|
|
|
||
|
|
<dt><strong>service</strong> (Output) </dt>
|
||
|
|
|
||
|
|
<dd>A pointer to a list of service names.<br><br></dd>
|
||
|
|
|
||
|
|
<dt><strong>netaddr</strong> (Input) </dt>
|
||
|
|
|
||
|
|
<dd>A pointer to the address.</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Authorities</h3>
|
||
|
|
|
||
|
|
<p>No authorization is required.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Return Value</h3>
|
||
|
|
|
||
|
|
<table cellpadding="5">
|
||
|
|
<!-- cols="5 95" -->
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>0</em></td>
|
||
|
|
<td align="left" valign="top"><strong>netdir_getbyaddr()</strong> was successful. A list of
|
||
|
|
host names and service name pairs is returned in <em>service</em>.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>-1</em></td>
|
||
|
|
<td align="left" valign="top"><strong>netdir_getbyaddr()</strong> was not successful. The
|
||
|
|
<em>nd_errno</em> (defined in <strong><netdir.h></strong>) is set to
|
||
|
|
indicate the error.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Error Conditions</h3>
|
||
|
|
|
||
|
|
<p>If <strong>netdir_getbyaddr()</strong> is not successful, <em>nd_errno</em>
|
||
|
|
usually indicates one of the following errors:</p>
|
||
|
|
|
||
|
|
<table cellpadding="5">
|
||
|
|
<!-- cols="25 75" -->
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>[ND_BADARG]</em></td>
|
||
|
|
<td align="left" valign="top">Bad argument passed.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>[ND_NO_DATA]</em></td>
|
||
|
|
<td align="left" valign="top">The host name is a valid name but there is no corresponding IP
|
||
|
|
address.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>[ND_NOHOST]</em></td>
|
||
|
|
<td align="left" valign="top">The host name that the user specified by the host address was
|
||
|
|
not found.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>[ND_NOMEM]</em></td>
|
||
|
|
<td align="left" valign="top">Not enough memory left.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>[ND_NO_RECOVERY]</em></td>
|
||
|
|
<td align="left" valign="top">An unrecoverable error has occurred.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>[ND_SYSTEM]</em></td>
|
||
|
|
<td align="left" valign="top">A damaged object was encountered. The damaged object cannot be
|
||
|
|
used.</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top"><em>[ND_TRY_AGAIN]</em></td>
|
||
|
|
<td align="left" valign="top">The local server did not receive a response from an
|
||
|
|
authoritative server. An attempt at a later time may succeed.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Error Messages</h3>
|
||
|
|
|
||
|
|
<table width="100%">
|
||
|
|
<tr>
|
||
|
|
<th align="left" valign="top">Message ID</th>
|
||
|
|
<th align="left" valign="top">Error Message Text</th>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td width="15%" valign="top">CPF9872 E</td>
|
||
|
|
<td width="85%" valign="top">Program or service program &1 in library
|
||
|
|
&2 ended. Reason code &3.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Usage Notes</h3>
|
||
|
|
|
||
|
|
<p><strong>netdir_getbyaddr()</strong> is called with an address in the
|
||
|
|
<em>netaddr</em> structure.</p>
|
||
|
|
|
||
|
|
<p>The caller is responsible to free the storage allocated by
|
||
|
|
<strong>netdir_getbyaddr()</strong> by using the function
|
||
|
|
<strong>netdir_free()</strong>.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
|
||
|
|
|
||
|
|
<h3>Example</h3>
|
||
|
|
<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
|
||
|
|
for information pertaining to code examples.</p>
|
||
|
|
<p>The following example shows how <strong>netdir_getbyaddr()</strong> is
|
||
|
|
used:</p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
#include <netdir.h>
|
||
|
|
|
||
|
|
void findhost(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
void *handlep;
|
||
|
|
struct netconfig *nconf;
|
||
|
|
struct nd_hostservlist *nd_hostserv;
|
||
|
|
struct netbuf nbuf;
|
||
|
|
char uaddr[16];
|
||
|
|
|
||
|
|
/* Initialize the network selection mechanism */
|
||
|
|
if (handlep = setnetconfig()) == (void *)NULL)
|
||
|
|
{
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the netconfig handle */
|
||
|
|
if ((nconf = getnetconfig(handlep)) == (struct netconf *)NULL)
|
||
|
|
{
|
||
|
|
printf("Error getting the netconfig handle\n");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
memset(uaddr, NULL, 16);
|
||
|
|
printf("Enter the host IP address appended by low and high order
|
||
|
|
port numbers:\n");
|
||
|
|
scanf("%s", uaddr);
|
||
|
|
|
||
|
|
/* Convert universal address notation into transport-specific
|
||
|
|
* address format.
|
||
|
|
*/
|
||
|
|
nbuf = uaddr2taddr(nconf, uaddr);
|
||
|
|
|
||
|
|
/* Get the hostname from the address over the transport */
|
||
|
|
/* provider specified in the netconfig structure */
|
||
|
|
if (netdir_getbyaddr(nconf, &nd_hostserv, &nbuf)
|
||
|
|
!= ND_OK)
|
||
|
|
{
|
||
|
|
printf("Cannot determine the host\n");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
printf("The host name is: %s\n",
|
||
|
|
nd_hostserv->h_hostservs->h_host);
|
||
|
|
printf("The Service is: %s\n", nd_hostserv->h_hostservs->h_serv);
|
||
|
|
|
||
|
|
/* Free the netdir structure allocated by netdir_getbyname() */
|
||
|
|
netdir_free(nd_hostserv, ND_HOSTSERVLIST);
|
||
|
|
|
||
|
|
/* Release the netconfig handle allocated by set setnetconfig() */
|
||
|
|
endnetconfig(handlep);
|
||
|
|
}
|
||
|
|
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<hr>
|
||
|
|
API introduced: V4R2
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<table cellpadding="2" cellspacing="2" align="center">
|
||
|
|
<tr align="center">
|
||
|
|
<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
|
||
|
|
"rpc1.htm">Remote Procedure Call (RPC) APIs</a> | <a href="aplist.htm">APIs by
|
||
|
|
category</a></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
|