PlatformCommon.c | searchcode

/opensource.apple.com/source/mDNSResponder/mDNSResponder-161.1/mDNSShared/PlatformCommon.c

#
C | 179 lines | 114 code | 11 blank | 54 comment | 8 complexity | 3b5735ceac601e604a1fb897d3dd0fc5 MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, GPL-2.0, BSD-3-Clause, GPL-3.0, MPL-2.0, LGPL-2.0, LGPL-2.1, CC-BY-SA-3.0, IPL-1.0, ISC, AGPL-1.0, AGPL-3.0, JSON, Apache-2.0, 0BSD

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>PlatformCommon.c</title>
<style type="text/css">
.enscript-comment { font-style: italic; color: rgb(178,34,34); }
.enscript-function-name { font-weight: bold; color: rgb(0,0,255); }
.enscript-variable-name { font-weight: bold; color: rgb(184,134,11); }
.enscript-keyword { font-weight: bold; color: rgb(160,32,240); }
.enscript-reference { font-weight: bold; color: rgb(95,158,160); }
.enscript-string { font-weight: bold; color: rgb(188,143,143); }
.enscript-builtin { font-weight: bold; color: rgb(218,112,214); }
.enscript-type { font-weight: bold; color: rgb(34,139,34); }
.enscript-highlight { text-decoration: underline; color: 0; }
</style>
</head>
<body id="top">
<h1 style="margin:8px;" id="f1">PlatformCommon.c&nbsp;&nbsp;&nbsp;<span style="font-weight: normal; font-size: 0.5em;">[<a href="?txt">plain text</a>]</span></h1>
<hr/>
<div></div>
<pre>
<span class="enscript-comment">/* -*- Mode: C; tab-width: 4 -*-
 *
 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     <a href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a>
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.

    Change History (most recent first):

$Log: PlatformCommon.c,v $
Revision 1.11  2007/07/31 23:08:34  mcguire
&lt;rdar://problem/5329542&gt; BTMM: Make AutoTunnel mode work with multihoming

Revision 1.10  2007/07/11 02:59:58  cheshire
&lt;rdar://problem/5303807&gt; Register IPv6-only hostname and don't create port mappings for AutoTunnel services
Add AutoTunnel parameter to mDNS_SetSecretForDomain

Revision 1.9  2007/01/09 22:37:44  cheshire
Remove unused ClearDomainSecrets() function

Revision 1.8  2006/12/22 20:59:51  cheshire
&lt;rdar://problem/4742742&gt; Read *all* DNS keys from keychain,
 not just key for the system-wide default registration domain

Revision 1.7  2006/08/14 23:24:56  cheshire
Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0

Revision 1.6  2005/04/08 21:30:16  ksekar
&lt;rdar://problem/4007457&gt; Compiling problems with mDNSResponder-98 on Solaris/Sparc v9
Patch submitted by Bernd Kuhls

Revision 1.5  2005/02/01 19:33:30  ksekar
&lt;rdar://problem/3985239&gt; Keychain format too restrictive

Revision 1.4  2005/01/19 19:19:21  ksekar
&lt;rdar://problem/3960191&gt; Need a way to turn off domain discovery

Revision 1.3  2004/12/13 17:46:52  cheshire
Use sizeof(buf) instead of fixed constant 1024

Revision 1.2  2004/12/01 03:30:29  cheshire
&lt;rdar://problem/3889346&gt; Add Unicast DNS support to mDNSPosix

Revision 1.1  2004/12/01 01:51:35  cheshire
Move ReadDDNSSettingsFromConfFile() from mDNSMacOSX.c to PlatformCommon.c

 */</span>

#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;stdio.h&gt;</span>				// Needed for fopen() etc.
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;unistd.h&gt;</span>				// Needed for close()
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;string.h&gt;</span>				// Needed for strlen() etc.
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;errno.h&gt;</span>			// Needed for errno etc.
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;sys/socket.h&gt;</span>			// Needed for socket() etc.
#<span class="enscript-reference">include</span> <span class="enscript-string">&lt;netinet/in.h&gt;</span>			// Needed for sockaddr_in

#<span class="enscript-reference">include</span> <span class="enscript-string">&quot;mDNSEmbeddedAPI.h&quot;</span>	// Defines the interface provided to the client layer above
#<span class="enscript-reference">include</span> <span class="enscript-string">&quot;DNSCommon.h&quot;</span>
#<span class="enscript-reference">include</span> <span class="enscript-string">&quot;PlatformCommon.h&quot;</span>

#<span class="enscript-reference">ifdef</span> <span class="enscript-variable-name">NOT_HAVE_SOCKLEN_T</span>
    <span class="enscript-type">typedef</span> <span class="enscript-type">unsigned</span> <span class="enscript-type">int</span> socklen_t;
#<span class="enscript-reference">endif</span>

<span class="enscript-comment">// Bind a UDP socket to find the source address to a destination
</span>mDNSexport <span class="enscript-type">void</span> <span class="enscript-function-name">FindSourceAddrForIP</span>(mDNSAddr *<span class="enscript-type">const</span> dst, mDNSAddr *src)
	{
	<span class="enscript-type">struct</span> sockaddr_in addr;
	socklen_t len = <span class="enscript-keyword">sizeof</span>(addr);
	<span class="enscript-type">int</span> sock = socket(AF_INET,SOCK_DGRAM,0);
	src-&gt;type = mDNSAddrType_None;
	<span class="enscript-keyword">if</span> (sock == -1) <span class="enscript-keyword">return</span>;
	<span class="enscript-keyword">if</span> (dst-&gt;type != mDNSAddrType_IPv4) <span class="enscript-keyword">return</span>; <span class="enscript-comment">// Only support v4 for now
</span>	addr.sin_family = AF_INET;
	addr.sin_port = 1;	<span class="enscript-comment">// Not important, any port will do
</span>	<span class="enscript-keyword">if</span> (dst == NULL) addr.sin_addr.s_addr = 0x11111111;
	<span class="enscript-keyword">else</span> addr.sin_addr.s_addr = dst-&gt;ip.v4.NotAnInteger;
	<span class="enscript-keyword">if</span> ((connect(sock,(<span class="enscript-type">const</span> <span class="enscript-type">struct</span> sockaddr*)&amp;addr,<span class="enscript-keyword">sizeof</span>(addr))) == -1) { close(sock); <span class="enscript-keyword">return</span>; }
	<span class="enscript-keyword">if</span> ((getsockname(sock,(<span class="enscript-type">struct</span> sockaddr*)&amp;addr, &amp;len)) == -1) { close(sock); <span class="enscript-keyword">return</span>; }
	close(sock);
	src-&gt;type = mDNSAddrType_IPv4;
	src-&gt;ip.v4.NotAnInteger = addr.sin_addr.s_addr;
	}

<span class="enscript-comment">// dst must be at least MAX_ESCAPED_DOMAIN_NAME bytes, and option must be less than 32 bytes in length
</span>mDNSlocal mDNSBool <span class="enscript-function-name">GetConfigOption</span>(<span class="enscript-type">char</span> *dst, <span class="enscript-type">const</span> <span class="enscript-type">char</span> *option, FILE *f)
	{
	<span class="enscript-type">char</span> buf[32+1+MAX_ESCAPED_DOMAIN_NAME];	<span class="enscript-comment">// Option name, one space, option value
</span>	<span class="enscript-type">unsigned</span> <span class="enscript-type">int</span> len = strlen(option);
	<span class="enscript-keyword">if</span> (len + 1 + MAX_ESCAPED_DOMAIN_NAME &gt; <span class="enscript-keyword">sizeof</span>(buf)-1) { LogMsg(<span class="enscript-string">&quot;GetConfigOption: option %s too long&quot;</span>, option); <span class="enscript-keyword">return</span> mDNSfalse; }
	fseek(f, 0, SEEK_SET);  <span class="enscript-comment">// set position to beginning of stream
</span>	<span class="enscript-keyword">while</span> (fgets(buf, <span class="enscript-keyword">sizeof</span>(buf), f))		<span class="enscript-comment">// Read at most sizeof(buf)-1 bytes from file, and append '\0' C-string terminator
</span>		{
		<span class="enscript-keyword">if</span> (!strncmp(buf, option, len))
			{
			strncpy(dst, buf + len + 1, MAX_ESCAPED_DOMAIN_NAME-1);
			<span class="enscript-keyword">if</span> (dst[MAX_ESCAPED_DOMAIN_NAME-1]) dst[MAX_ESCAPED_DOMAIN_NAME-1] = <span class="enscript-string">'\0'</span>;
			len = strlen(dst);
			<span class="enscript-keyword">if</span> (len &amp;&amp; dst[len-1] == <span class="enscript-string">'\n'</span>) dst[len-1] = <span class="enscript-string">'\0'</span>;  <span class="enscript-comment">// chop newline
</span>			<span class="enscript-keyword">return</span> mDNStrue;
			}
		}
	debugf(<span class="enscript-string">&quot;Option %s not set&quot;</span>, option);
	<span class="enscript-keyword">return</span> mDNSfalse;
	}

mDNSexport <span class="enscript-type">void</span> <span class="enscript-function-name">ReadDDNSSettingsFromConfFile</span>(mDNS *<span class="enscript-type">const</span> m, <span class="enscript-type">const</span> <span class="enscript-type">char</span> *<span class="enscript-type">const</span> filename, domainname *<span class="enscript-type">const</span> hostname, domainname *<span class="enscript-type">const</span> domain, mDNSBool *DomainDiscoveryDisabled)
	{
	<span class="enscript-type">char</span> buf   [MAX_ESCAPED_DOMAIN_NAME];
	<span class="enscript-type">char</span> secret[MAX_ESCAPED_DOMAIN_NAME] = <span class="enscript-string">&quot;&quot;</span>;
	mStatus err;
	FILE *f = fopen(filename, <span class="enscript-string">&quot;r&quot;</span>);

    <span class="enscript-keyword">if</span> (hostname)                 hostname-&gt;c[0] = 0;
    <span class="enscript-keyword">if</span> (domain)                   domain-&gt;c[0] = 0;
	<span class="enscript-keyword">if</span> (DomainDiscoveryDisabled) *DomainDiscoveryDisabled = mDNSfalse;

	<span class="enscript-keyword">if</span> (f)
		{
		<span class="enscript-keyword">if</span> (DomainDiscoveryDisabled &amp;&amp; GetConfigOption(buf, <span class="enscript-string">&quot;DomainDiscoveryDisabled&quot;</span>, f) &amp;&amp; !strcasecmp(buf, <span class="enscript-string">&quot;true&quot;</span>)) *DomainDiscoveryDisabled = mDNStrue;
		<span class="enscript-keyword">if</span> (hostname &amp;&amp; GetConfigOption(buf, <span class="enscript-string">&quot;hostname&quot;</span>, f) &amp;&amp; !MakeDomainNameFromDNSNameString(hostname, buf)) <span class="enscript-keyword">goto</span> <span class="enscript-reference">badf</span>;
		<span class="enscript-keyword">if</span> (domain &amp;&amp; GetConfigOption(buf, <span class="enscript-string">&quot;zone&quot;</span>, f) &amp;&amp; !MakeDomainNameFromDNSNameString(domain, buf)) <span class="enscript-keyword">goto</span> <span class="enscript-reference">badf</span>;
		GetConfigOption(secret, <span class="enscript-string">&quot;secret-64&quot;</span>, f);  <span class="enscript-comment">// failure means no authentication	   		
</span>		fclose(f);
		f = NULL;
		}
	<span class="enscript-keyword">else</span>
		{
		<span class="enscript-keyword">if</span> (errno != ENOENT) LogMsg(<span class="enscript-string">&quot;ERROR: Config file exists, but cannot be opened.&quot;</span>);
		<span class="enscript-keyword">return</span>;
		}

	<span class="enscript-keyword">if</span> (domain &amp;&amp; domain-&gt;c[0] &amp;&amp; secret[0])
		{
		DomainAuthInfo *info = (DomainAuthInfo*)mDNSPlatformMemAllocate(<span class="enscript-keyword">sizeof</span>(*info));
		<span class="enscript-comment">// for now we assume keyname = service reg domain and we use same key for service and hostname registration
</span>		err = mDNS_SetSecretForDomain(m, info, domain, domain, secret, mDNSfalse);
		<span class="enscript-keyword">if</span> (err) LogMsg(<span class="enscript-string">&quot;ERROR: mDNS_SetSecretForDomain returned %d for domain %##s&quot;</span>, err, domain-&gt;c);
		}

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

	<span class="enscript-reference">badf</span>:
	LogMsg(<span class="enscript-string">&quot;ERROR: malformatted config file&quot;</span>);
	<span class="enscript-keyword">if</span> (f) fclose(f);	
	}
</pre>
<hr />
</body></html>