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6982N/A<
title>lwres_getrrsetbyname</
title>
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4673N/A<
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div class="refentry" lang="en">
4673N/A<
a name="id2456618"></
a><
div class="titlepage"></
div>
4673N/A<
p>lwres_getrrsetbyname, lwres_freerrset — retrieve DNS records</
p>
4673N/A<
div class="refsynopsisdiv">
4673N/A<
table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em">
4673N/A<
b class="fsfunc">lwres_getrrsetbyname</
b>(</
code></
td>
4673N/A<
var class="pdparam">hostname</
var>, </
td>
4673N/A<
var class="pdparam">rdclass</
var>, </
td>
4673N/A<
var class="pdparam">rdtype</
var>, </
td>
4673N/A<
var class="pdparam">flags</
var>, </
td>
4673N/A<
td>struct rrsetinfo **�</
td>
4673N/A<
var class="pdparam">res</
var><
code>)</
code>;</
td>
4673N/A<
table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><
tr>
4673N/A<
b class="fsfunc">lwres_freerrset</
b>(</
code></
td>
4673N/A<
td>struct rrsetinfo *�</
td>
4673N/A<
var class="pdparam">rrset</
var><
code>)</
code>;</
td>
4673N/A The following structures are used:
4673N/A<
pre class="programlisting">
4673N/A unsigned int rdi_length; /* length of data */
4673N/A unsigned char *rdi_data; /* record data */
4673N/A<
pre class="programlisting">
4673N/A unsigned int rri_flags; /* RRSET_VALIDATED... */
4673N/A unsigned int rri_rdclass; /* class number */
4673N/A unsigned int rri_rdtype; /* RR type number */
4673N/A unsigned int rri_ttl; /* time to live */
4673N/A unsigned int rri_nrdatas; /* size of rdatas array */
4673N/A unsigned int rri_nsigs; /* size of sigs array */
4673N/A char *rri_name; /* canonical name */
4673N/A struct rdatainfo *rri_rdatas; /* individual records */
4673N/A struct rdatainfo *rri_sigs; /* individual signatures */
4673N/A<
div class="refsect1" lang="en">
4673N/A<
a name="id2514028"></
a><
h2>DESCRIPTION</
h2>
4673N/A<
p><
code class="function">lwres_getrrsetbyname()</
code>
4673N/A gets a set of resource records associated with a
4673N/A <
em class="parameter"><
code>hostname</
code></
em>, <
em class="parameter"><
code>class</
code></
em>,
4673N/A and <
em class="parameter"><
code>type</
code></
em>.
4673N/A <
em class="parameter"><
code>hostname</
code></
em> is a pointer a to
4673N/A null-terminated string. The <
em class="parameter"><
code>flags</
code></
em> field
4673N/A is currently unused and must be zero.
4673N/A <
code class="function">lwres_getrrsetbyname()</
code>,
4673N/A <
em class="parameter"><
code>*res</
code></
em> is a pointer to an
4673N/A <
span class="type">rrsetinfo</
span> structure, containing a list of one or
4673N/A more <
span class="type">rdatainfo</
span> structures containing resource
4673N/A records and potentially another list of <
span class="type">rdatainfo</
span>
4673N/A structures containing SIG resource records associated with those
4673N/A records. The members <
code class="constant">rri_rdclass</
code> and
4673N/A <
code class="constant">rri_rdtype</
code> are copied from the parameters.
4673N/A <
code class="constant">rri_ttl</
code> and <
code class="constant">rri_name</
code>
4673N/A are properties of the obtained rrset. The resource records
4673N/A contained in <
code class="constant">rri_rdatas</
code> and
4673N/A <
code class="constant">rri_sigs</
code> are in uncompressed DNS wire
4673N/A format. Properties of the rdataset are represented in the
4673N/A <
code class="constant">rri_flags</
code> bitfield. If the RRSET_VALIDATED
4673N/A bit is set, the data has been DNSSEC validated and the
4673N/A All of the information returned by
4673N/A <
code class="function">lwres_getrrsetbyname()</
code> is dynamically
4673N/A allocated: the <
code class="constant">rrsetinfo</
code> and
4673N/A <
code class="constant">rdatainfo</
code> structures, and the canonical
4673N/A host name strings pointed to by the
4673N/A <
code class="constant">rrsetinfo</
code>structure.
4673N/A Memory allocated for the dynamically allocated structures
5821N/A created by a successful call to
4673N/A <
code class="function">lwres_getrrsetbyname()</
code> is released by
4673N/A <
code class="function">lwres_freerrset()</
code>.
4673N/A <
em class="parameter"><
code>rrset</
code></
em> is a pointer to a <
span class="type">struct
4673N/A rrset</
span> created by a call to
4673N/A <
code class="function">lwres_getrrsetbyname()</
code>.
4673N/A<
div class="refsect1" lang="en">
4673N/A<
a name="id2514277"></
a><
h2>RETURN VALUES</
h2>
4673N/A<
p><
code class="function">lwres_getrrsetbyname()</
code>
4673N/A returns zero on success, and one of the following error codes if
4673N/A<
div class="variablelist"><
dl>
4673N/A<
dt><
span class="term"><
code class="constant">ERRSET_NONAME</
code></
span></
dt>
<
dt><
span class="term"><
code class="constant">ERRSET_NODATA</
code></
span></
dt>
the name exists, but does not have data of the desired type
<
dt><
span class="term"><
code class="constant">ERRSET_NOMEMORY</
code></
span></
dt>
memory could not be allocated
<
dt><
span class="term"><
code class="constant">ERRSET_INVAL</
code></
span></
dt>
<
dt><
span class="term"><
code class="constant">ERRSET_FAIL</
code></
span></
dt>
<
dt><
span class="term"><
code class="constant"></
code></
span></
dt>
<
div class="refsect1" lang="en">
<
a name="id2514377"></
a><
h2>SEE ALSO</
h2>
<
p><
span class="citerefentry"><
span class="refentrytitle">lwres</
span>(3)</
span>.