lu_bootp.c | searchcode

/opensource.apple.com/source/Libinfo/Libinfo-173/lookup.subproj/lu_bootp.c

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<h1 style="margin:8px;" id="f1">lu_bootp.c&nbsp;&nbsp;&nbsp;<span style="font-weight: normal; font-size: 0.5em;">[<a href="?txt">plain text</a>]</span></h1>
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<span class="enscript-comment">/*
 * Copyright (c) 1999-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * <a href="http://www.opensource.apple.com/apsl/">http://www.opensource.apple.com/apsl/</a> and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */</span>
<span class="enscript-comment">/*
 * Bootp lookup - netinfo only
 * Copyright (C) 1989 by NeXT, Inc.
 */</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;mach/mach.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;stdio.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;stdlib.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;string.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;rpc/types.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;rpc/xdr.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;sys/socket.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;netinet/in.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;arpa/inet.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;net/if.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;netinet/if_ether.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;net/ethernet.h&gt;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;pthread.h&gt;</span>

#<span class="enscript-reference">include</span> <span class="enscript-string">&quot;_lu_types.h&quot;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&quot;lookup.h&quot;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&quot;lu_utils.h&quot;</span>

<span class="enscript-type">extern</span> <span class="enscript-type">struct</span> ether_addr *<span class="enscript-function-name">ether_aton</span>(<span class="enscript-type">char</span> *);

<span class="enscript-type">static</span> pthread_mutex_t _bootp_lock = PTHREAD_MUTEX_INITIALIZER;

<span class="enscript-type">struct</span> bootpent
{
	<span class="enscript-type">char</span> *b_name;
	<span class="enscript-type">struct</span> ether_addr b_enaddr;
	<span class="enscript-type">struct</span> in_addr b_ipaddr;
	<span class="enscript-type">char</span> *b_bootfile;
};

<span class="enscript-type">static</span> <span class="enscript-type">void</span>
<span class="enscript-function-name">free_bootp</span>(<span class="enscript-type">struct</span> bootpent *b)
{
	<span class="enscript-keyword">if</span> (b == NULL) <span class="enscript-keyword">return</span>;

	<span class="enscript-keyword">if</span> (b-&gt;b_name != NULL) free(b-&gt;b_name);
	<span class="enscript-keyword">if</span> (b-&gt;b_bootfile != NULL) free(b-&gt;b_bootfile);

	free(b);
}

<span class="enscript-type">static</span> <span class="enscript-type">struct</span> bootpent *
<span class="enscript-function-name">extract_bootp</span>(XDR *xdr)
{
	<span class="enscript-type">struct</span> bootpent *b;
	<span class="enscript-type">struct</span> ether_addr *e;
	<span class="enscript-type">int</span> i, j, nvals, nkeys, status;
	<span class="enscript-type">char</span> *key, **vals;

	<span class="enscript-keyword">if</span> (xdr == NULL) <span class="enscript-keyword">return</span> NULL;

	<span class="enscript-keyword">if</span> (!xdr_int(xdr, &amp;nkeys)) <span class="enscript-keyword">return</span> NULL;

	b = (<span class="enscript-type">struct</span> bootpent *)calloc(1, <span class="enscript-keyword">sizeof</span>(<span class="enscript-type">struct</span> bootpent));

	<span class="enscript-keyword">for</span> (i = 0; i &lt; nkeys; i++)
	{
		key = NULL;
		vals = NULL;
		nvals = 0;

		status = _lu_xdr_attribute(xdr, &amp;key, &amp;vals, &amp;nvals);
		<span class="enscript-keyword">if</span> (status &lt; 0)
		{
			free_bootp(b);
			<span class="enscript-keyword">return</span> NULL;
		}

		<span class="enscript-keyword">if</span> (nvals == 0)
		{
			free(key);
			<span class="enscript-keyword">continue</span>;
		}

		j = 0;

		<span class="enscript-keyword">if</span> ((b-&gt;b_name == NULL) &amp;&amp; (!strcmp(<span class="enscript-string">&quot;name&quot;</span>, key)))
		{
			b-&gt;b_name = vals[0];
			j = 1;
		}
		<span class="enscript-keyword">if</span> ((b-&gt;b_name == NULL) &amp;&amp; (!strcmp(<span class="enscript-string">&quot;bootfile&quot;</span>, key)))
		{
			b-&gt;b_bootfile = vals[0];
			j = 1;
		}
		<span class="enscript-keyword">else</span> <span class="enscript-keyword">if</span> (!strcmp(<span class="enscript-string">&quot;ip_address&quot;</span>, key))
		{
			b-&gt;b_ipaddr.s_addr = inet_addr(vals[0]);
		}
		<span class="enscript-keyword">else</span> <span class="enscript-keyword">if</span> (!strcmp(<span class="enscript-string">&quot;en_address&quot;</span>, key))
		{
			pthread_mutex_lock(&amp;_bootp_lock);
			e = ether_aton(vals[0]);
			<span class="enscript-keyword">if</span> (e != NULL) memcpy(&amp;(b-&gt;b_enaddr), e, <span class="enscript-keyword">sizeof</span>(<span class="enscript-type">struct</span> ether_addr));
			pthread_mutex_unlock(&amp;_bootp_lock);
			j = 1;
		}

		free(key);
		<span class="enscript-keyword">if</span> (vals != NULL)
		{
			<span class="enscript-keyword">for</span> (; j &lt; nvals; j++) free(vals[j]);
			free(vals);
		}
	}

	<span class="enscript-keyword">if</span> (b-&gt;b_name == NULL) b-&gt;b_name = strdup(<span class="enscript-string">&quot;&quot;</span>);
	<span class="enscript-keyword">if</span> (b-&gt;b_bootfile == NULL) b-&gt;b_bootfile = strdup(<span class="enscript-string">&quot;&quot;</span>);

	<span class="enscript-keyword">return</span> b;
}

<span class="enscript-type">static</span> <span class="enscript-type">int</span> 
<span class="enscript-function-name">lu_bootp_getbyether</span>(<span class="enscript-type">struct</span> ether_addr *enaddr, <span class="enscript-type">char</span> **name,
	<span class="enscript-type">struct</span> in_addr *ipaddr, <span class="enscript-type">char</span> **bootfile)
{
	<span class="enscript-type">unsigned</span> datalen;
	XDR inxdr;
	<span class="enscript-type">struct</span> bootpent *b;
	<span class="enscript-type">static</span> <span class="enscript-type">int</span> proc = -1;
	<span class="enscript-type">char</span> *lookup_buf;
	<span class="enscript-type">int</span> count;

	<span class="enscript-keyword">if</span> (proc &lt; 0)
	{
		<span class="enscript-keyword">if</span> (_lookup_link(_lu_port, <span class="enscript-string">&quot;bootp_getbyether&quot;</span>, &amp;proc) != KERN_SUCCESS)
		{
			<span class="enscript-keyword">return</span> 0;
		}
	}

	datalen = 0;
	lookup_buf = NULL;

	<span class="enscript-keyword">if</span> (_lookup_all(_lu_port, proc, (unit *)enaddr, ((<span class="enscript-keyword">sizeof</span>(*enaddr) + <span class="enscript-keyword">sizeof</span>(unit) - 1) / <span class="enscript-keyword">sizeof</span>(unit)), &amp;lookup_buf, &amp;datalen) != KERN_SUCCESS)
	{
		<span class="enscript-keyword">return</span> 0;
	}

	datalen *= BYTES_PER_XDR_UNIT;
	<span class="enscript-keyword">if</span> ((lookup_buf == NULL) || (datalen == 0)) <span class="enscript-keyword">return</span> NULL;

	xdrmem_create(&amp;inxdr, lookup_buf, datalen, XDR_DECODE);

	count = 0;
	<span class="enscript-keyword">if</span> (!xdr_int(&amp;inxdr, &amp;count))
	{
		xdr_destroy(&amp;inxdr);
		vm_deallocate(mach_task_self(), (vm_address_t)lookup_buf, datalen);
		<span class="enscript-keyword">return</span> 0;
	}

	<span class="enscript-keyword">if</span> (count == 0)
	{
		xdr_destroy(&amp;inxdr);
		vm_deallocate(mach_task_self(), (vm_address_t)lookup_buf, datalen);
		<span class="enscript-keyword">return</span> 0;
	}

	b = extract_bootp(&amp;inxdr);
	xdr_destroy(&amp;inxdr);

	*name = b-&gt;b_name;
	*bootfile = b-&gt;b_bootfile;
	ipaddr-&gt;s_addr = b-&gt;b_ipaddr.s_addr;

	free(b);
	vm_deallocate(mach_task_self(), (vm_address_t)lookup_buf, datalen);

	<span class="enscript-keyword">return</span> 1;
}

<span class="enscript-type">static</span> <span class="enscript-type">int</span> 
<span class="enscript-function-name">lu_bootp_getbyip</span>(<span class="enscript-type">struct</span> ether_addr *enaddr, <span class="enscript-type">char</span> **name,
	<span class="enscript-type">struct</span> in_addr *ipaddr, <span class="enscript-type">char</span> **bootfile)
{
	<span class="enscript-type">unsigned</span> datalen;
	XDR inxdr;
	<span class="enscript-type">struct</span> bootpent *b;
	<span class="enscript-type">static</span> <span class="enscript-type">int</span> proc = -1;
	<span class="enscript-type">char</span> *lookup_buf;
	<span class="enscript-type">int</span> count;
	
	<span class="enscript-keyword">if</span> (proc &lt; 0)
	{
		<span class="enscript-keyword">if</span> (_lookup_link(_lu_port, <span class="enscript-string">&quot;bootp_getbyip&quot;</span>, &amp;proc) != KERN_SUCCESS)
		{
			<span class="enscript-keyword">return</span> 0;
		}
	}

	datalen = 0;
	lookup_buf = NULL;

	<span class="enscript-keyword">if</span> (_lookup_all(_lu_port, proc, (unit *)ipaddr, ((<span class="enscript-keyword">sizeof</span>(*ipaddr) + <span class="enscript-keyword">sizeof</span>(unit) - 1) / <span class="enscript-keyword">sizeof</span>(unit)), &amp;lookup_buf, &amp;datalen) != KERN_SUCCESS)
	{
		<span class="enscript-keyword">return</span> 0;
	}

	datalen *= BYTES_PER_XDR_UNIT;
	<span class="enscript-keyword">if</span> ((lookup_buf == NULL) || (datalen == 0)) <span class="enscript-keyword">return</span> NULL;

	xdrmem_create(&amp;inxdr, lookup_buf, datalen, XDR_DECODE);

	count = 0;
	<span class="enscript-keyword">if</span> (!xdr_int(&amp;inxdr, &amp;count))
	{
		xdr_destroy(&amp;inxdr);
		vm_deallocate(mach_task_self(), (vm_address_t)lookup_buf, datalen);
		<span class="enscript-keyword">return</span> 0;
	}

	<span class="enscript-keyword">if</span> (count == 0)
	{
		xdr_destroy(&amp;inxdr);
		vm_deallocate(mach_task_self(), (vm_address_t)lookup_buf, datalen);
		<span class="enscript-keyword">return</span> 0;
	}

	b = extract_bootp(&amp;inxdr);
	xdr_destroy(&amp;inxdr);

	*name = b-&gt;b_name;
	*bootfile = b-&gt;b_bootfile;
	memcpy(enaddr, &amp;(b-&gt;b_enaddr), <span class="enscript-keyword">sizeof</span>(<span class="enscript-type">struct</span> ether_addr));

	free(b);
	vm_deallocate(mach_task_self(), (vm_address_t)lookup_buf, datalen);

	<span class="enscript-keyword">return</span> 1;
}

<span class="enscript-type">int</span>
<span class="enscript-function-name">bootp_getbyether</span>(<span class="enscript-type">struct</span> ether_addr *enaddr, <span class="enscript-type">char</span> **name,<span class="enscript-type">struct</span> in_addr *ipaddr, <span class="enscript-type">char</span> **bootfile)
{
	<span class="enscript-keyword">if</span> (_lu_running())
	{
		<span class="enscript-keyword">return</span> (lu_bootp_getbyether(enaddr, name, ipaddr, bootfile));
	}
	<span class="enscript-keyword">return</span> 0;
}

<span class="enscript-type">int</span>
<span class="enscript-function-name">bootp_getbyip</span>(<span class="enscript-type">struct</span> ether_addr *enaddr, <span class="enscript-type">char</span> **name, <span class="enscript-type">struct</span> in_addr *ipaddr, <span class="enscript-type">char</span> **bootfile)
{
	<span class="enscript-keyword">if</span> (_lu_running())
	{
		<span class="enscript-keyword">return</span> (lu_bootp_getbyip(enaddr, name, ipaddr, bootfile));
	}
	<span class="enscript-keyword">return</span> 0;
}

</pre>
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