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<div class="title">dname.c</div> </div>
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<a href="dname_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * dname.c</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * dname specific rdata implementations</span>
<a name="l00005"></a>00005 <span class="comment"> * A dname is a rdf structure with type LDNS_RDF_TYPE_DNAME</span>
<a name="l00006"></a>00006 <span class="comment"> * It is not a /real/ type! All function must therefor check</span>
<a name="l00007"></a>00007 <span class="comment"> * for LDNS_RDF_TYPE_DNAME.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * a Net::DNS like library for C</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * (c) NLnet Labs, 2004-2006</span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * See the file LICENSE for the license</span>
<a name="l00014"></a>00014 <span class="comment"> */</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="preprocessor">#include <<a class="code" href="ldns_2config_8h.html">ldns/config.h</a>></span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="preprocessor">#include <<a class="code" href="ldns_8h.html" title="Including this file will include all ldns files, and define some lookup tables.">ldns/ldns.h</a>></span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="preprocessor">#ifdef HAVE_NETINET_IN_H</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span><span class="preprocessor">#include <netinet/in.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#endif</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#ifdef HAVE_SYS_SOCKET_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#include <sys/socket.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#endif</span>
<a name="l00026"></a>00026 <span class="preprocessor"></span><span class="preprocessor">#ifdef HAVE_NETDB_H</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#include <netdb.h></span>
<a name="l00028"></a>00028 <span class="preprocessor">#endif</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#ifdef HAVE_ARPA_INET_H</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#include <arpa/inet.h></span>
<a name="l00031"></a>00031 <span class="preprocessor">#endif</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00034"></a><a class="code" href="dname_8h.html#a216c2af6beeedff58f9275fcb420fbde">00034</a> <a class="code" href="dname_8c.html#a216c2af6beeedff58f9275fcb420fbde" title="concatenates two dnames together">ldns_dname_cat_clone</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *rd1, <span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *rd2)
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *<span class="keyword">new</span>;
<a name="l00037"></a>00037 uint16_t new_size;
<a name="l00038"></a>00038 uint8_t *buf;
<a name="l00039"></a>00039 uint16_t left_size;
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(rd1) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a> ||
<a name="l00042"></a>00042 <a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(rd2) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>) {
<a name="l00043"></a>00043 <span class="keywordflow">return</span> NULL;
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">/* remove root label if it is present at the end of the left</span>
<a name="l00047"></a>00047 <span class="comment"> * rd, by reducing the size with 1</span>
<a name="l00048"></a>00048 <span class="comment"> */</span>
<a name="l00049"></a>00049 left_size = <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rd1);
<a name="l00050"></a>00050 <span class="keywordflow">if</span> (left_size > 0 &&<a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd1)[left_size - 1] == 0) {
<a name="l00051"></a>00051 left_size--;
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="comment">/* we overwrite the nullbyte of rd1 */</span>
<a name="l00055"></a>00055 new_size = left_size + <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rd2);
<a name="l00056"></a>00056 buf = <a class="code" href="util_8h.html#aaad6949daea3c6cefd01d19300f6e21a">LDNS_XMALLOC</a>(uint8_t, new_size);
<a name="l00057"></a>00057 <span class="keywordflow">if</span> (!buf) {
<a name="l00058"></a>00058 <span class="keywordflow">return</span> NULL;
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="comment">/* put the two dname's after each other */</span>
<a name="l00062"></a>00062 memcpy(buf, <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd1), left_size);
<a name="l00063"></a>00063 memcpy(buf + left_size, <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd2), <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rd2));
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="keyword">new</span> = <a class="code" href="rdata_8c.html#afeaa67dccf9c97ac9209776936279319" title="allocates a new rdf structure and fills it.">ldns_rdf_new_frm_data</a>(<a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>, new_size, buf);
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <a class="code" href="util_8h.html#a5e13054aa9b3843e97514228a0bbe909">LDNS_FREE</a>(buf);
<a name="l00068"></a>00068 <span class="keywordflow">return</span> <span class="keyword">new</span>;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <a class="code" href="error_8h.html#aaa6d98f86f535cf87b83b89e91f488f9">ldns_status</a>
<a name="l00072"></a><a class="code" href="dname_8h.html#a8cca5c83c1eb85f9697c20978da31592">00072</a> <a class="code" href="dname_8c.html#a8cca5c83c1eb85f9697c20978da31592" title="concatenates rd2 after rd1 (rd2 is copied, rd1 is modified)">ldns_dname_cat</a>(<a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *rd1, <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *rd2)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 uint16_t left_size;
<a name="l00075"></a>00075 uint16_t size;
<a name="l00076"></a>00076 uint8_t* newd;
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(rd1) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a> ||
<a name="l00079"></a>00079 <a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(rd2) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>) {
<a name="l00080"></a>00080 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">/* remove root label if it is present at the end of the left</span>
<a name="l00084"></a>00084 <span class="comment"> * rd, by reducing the size with 1</span>
<a name="l00085"></a>00085 <span class="comment"> */</span>
<a name="l00086"></a>00086 left_size = <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rd1);
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (left_size > 0 &&<a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd1)[left_size - 1] == 0) {
<a name="l00088"></a>00088 left_size--;
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090 <span class="keywordflow">if</span>(left_size == 0) {
<a name="l00091"></a>00091 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>;
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093
<a name="l00094"></a>00094 size = left_size + <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rd2);
<a name="l00095"></a>00095 newd = <a class="code" href="util_8h.html#aef91214266c90875fa06e4a47e734538">LDNS_XREALLOC</a>(<a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd1), uint8_t, size);
<a name="l00096"></a>00096 <span class="keywordflow">if</span>(!newd) {
<a name="l00097"></a>00097 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa81e80e66a14551db514726fa49290498">LDNS_STATUS_MEM_ERR</a>;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <a class="code" href="rdata_8c.html#ad63c123e8c79ba3f51491655982a2a15" title="sets the size of the rdf.">ldns_rdf_set_data</a>(rd1, newd);
<a name="l00101"></a>00101 memcpy(<a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd1) + left_size, <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd2),
<a name="l00102"></a>00102 <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rd2));
<a name="l00103"></a>00103 <a class="code" href="rdata_8c.html#adcc8bc77944f8e93130adbfd0801a5a0" title="sets the size of the rdf.">ldns_rdf_set_size</a>(rd1, size);
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>;
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00109"></a><a class="code" href="dname_8h.html#a5fe17a6b657bca88b134c228671ea36c">00109</a> <a class="code" href="dname_8c.html#a5fe17a6b657bca88b134c228671ea36c" title="Returns a clone of the given dname with the labels reversed.">ldns_dname_reverse</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *d)
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *<span class="keyword">new</span>;
<a name="l00112"></a>00112 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *tmp;
<a name="l00113"></a>00113 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *d_tmp;
<a name="l00114"></a>00114 <a class="code" href="error_8h.html#aaa6d98f86f535cf87b83b89e91f488f9">ldns_status</a> status;
<a name="l00115"></a>00115
<a name="l00116"></a>00116 d_tmp = <a class="code" href="rdata_8c.html#af9a39f2f8b749efa6a20ba91cb696961" title="clones a rdf structure.">ldns_rdf_clone</a>(d);
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="keyword">new</span> = <a class="code" href="dname_8c.html#af4963d4ae086b1d77a58c6f757a00462" title="creates a new dname rdf from a string.">ldns_dname_new_frm_str</a>(<span class="stringliteral">"."</span>);
<a name="l00119"></a>00119 <span class="keywordflow">if</span>(!<span class="keyword">new</span>)
<a name="l00120"></a>00120 <span class="keywordflow">return</span> NULL;
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keywordflow">while</span>(<a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(d_tmp) > 0) {
<a name="l00123"></a>00123 tmp = <a class="code" href="dname_8c.html#aee5c4a1b633f7c41d8788610bb2369a8" title="look inside the rdf and if it is an LDNS_RDF_TYPE_DNAME try and retrieve a specific label...">ldns_dname_label</a>(d_tmp, 0);
<a name="l00124"></a>00124 status = <a class="code" href="dname_8c.html#a8cca5c83c1eb85f9697c20978da31592" title="concatenates rd2 after rd1 (rd2 is copied, rd1 is modified)">ldns_dname_cat</a>(tmp, <span class="keyword">new</span>);
<a name="l00125"></a>00125 <span class="keywordflow">if</span>(status != <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>) {
<a name="l00126"></a>00126 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(<span class="keyword">new</span>);
<a name="l00127"></a>00127 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(d_tmp);
<a name="l00128"></a>00128 <span class="keywordflow">return</span> NULL;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(<span class="keyword">new</span>);
<a name="l00131"></a>00131 <span class="keyword">new</span> = tmp;
<a name="l00132"></a>00132 tmp = <a class="code" href="dname_8c.html#aa2b0413896e1c06fd2cc685d4026d8ac" title="chop one label off the left side of a dname.">ldns_dname_left_chop</a>(d_tmp);
<a name="l00133"></a>00133 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(d_tmp);
<a name="l00134"></a>00134 d_tmp = tmp;
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(d_tmp);
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordflow">return</span> <span class="keyword">new</span>;
<a name="l00139"></a>00139 }
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00142"></a><a class="code" href="dname_8h.html#a474f7f019180b294da551d00a111149e">00142</a> <a class="code" href="dname_8c.html#a474f7f019180b294da551d00a111149e" title="Clones the given dname from the nth label on.">ldns_dname_clone_from</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *d, uint16_t n)
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 uint8_t *data;
<a name="l00145"></a>00145 uint8_t label_size;
<a name="l00146"></a>00146 <span class="keywordtype">size_t</span> data_size;
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (!d ||
<a name="l00149"></a>00149 <a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(d) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a> ||
<a name="l00150"></a>00150 <a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(d) < n) {
<a name="l00151"></a>00151 <span class="keywordflow">return</span> NULL;
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00154"></a>00154 data = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(d);
<a name="l00155"></a>00155 data_size = <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(d);
<a name="l00156"></a>00156 <span class="keywordflow">while</span> (n > 0) {
<a name="l00157"></a>00157 label_size = data[0] + 1;
<a name="l00158"></a>00158 data += label_size;
<a name="l00159"></a>00159 <span class="keywordflow">if</span> (data_size < label_size) {
<a name="l00160"></a>00160 <span class="comment">/* this label is very broken */</span>
<a name="l00161"></a>00161 <span class="keywordflow">return</span> NULL;
<a name="l00162"></a>00162 }
<a name="l00163"></a>00163 data_size -= label_size;
<a name="l00164"></a>00164 n--;
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="keywordflow">return</span> <a class="code" href="dname_8c.html#a27f7af7725d4eb5fc54c50e10c1ba88f" title="Create a new dname rdf from data (the data is copied)">ldns_dname_new_frm_data</a>(data_size, data);
<a name="l00168"></a>00168 }
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00171"></a><a class="code" href="dname_8h.html#aa2b0413896e1c06fd2cc685d4026d8ac">00171</a> <a class="code" href="dname_8c.html#aa2b0413896e1c06fd2cc685d4026d8ac" title="chop one label off the left side of a dname.">ldns_dname_left_chop</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *d)
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173 uint8_t label_pos;
<a name="l00174"></a>00174 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *chop;
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="keywordflow">if</span> (!d) {
<a name="l00177"></a>00177 <span class="keywordflow">return</span> NULL;
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(d) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>) {
<a name="l00181"></a>00181 <span class="keywordflow">return</span> NULL;
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 <span class="keywordflow">if</span> (<a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(d) == 0) {
<a name="l00184"></a>00184 <span class="comment">/* root label */</span>
<a name="l00185"></a>00185 <span class="keywordflow">return</span> NULL;
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187 <span class="comment">/* 05blaat02nl00 */</span>
<a name="l00188"></a>00188 label_pos = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(d)[0];
<a name="l00189"></a>00189
<a name="l00190"></a>00190 chop = <a class="code" href="dname_8c.html#a27f7af7725d4eb5fc54c50e10c1ba88f" title="Create a new dname rdf from data (the data is copied)">ldns_dname_new_frm_data</a>(<a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(d) - label_pos - 1,
<a name="l00191"></a>00191 <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(d) + label_pos + 1);
<a name="l00192"></a>00192 <span class="keywordflow">return</span> chop;
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194
<a name="l00195"></a>00195 uint8_t
<a name="l00196"></a><a class="code" href="dname_8h.html#add94977e68ceab64921e9ae69cd92ef3">00196</a> <a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *r)
<a name="l00197"></a>00197 {
<a name="l00198"></a>00198 uint16_t src_pos;
<a name="l00199"></a>00199 uint16_t len;
<a name="l00200"></a>00200 uint8_t i;
<a name="l00201"></a>00201 <span class="keywordtype">size_t</span> r_size;
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="keywordflow">if</span> (!r) {
<a name="l00204"></a>00204 <span class="keywordflow">return</span> 0;
<a name="l00205"></a>00205 }
<a name="l00206"></a>00206
<a name="l00207"></a>00207 i = 0;
<a name="l00208"></a>00208 src_pos = 0;
<a name="l00209"></a>00209 r_size = <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(r);
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(r) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>) {
<a name="l00212"></a>00212 <span class="keywordflow">return</span> 0;
<a name="l00213"></a>00213 } <span class="keywordflow">else</span> {
<a name="l00214"></a>00214 len = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(r)[src_pos]; <span class="comment">/* start of the label */</span>
<a name="l00215"></a>00215
<a name="l00216"></a>00216 <span class="comment">/* single root label */</span>
<a name="l00217"></a>00217 <span class="keywordflow">if</span> (1 == r_size) {
<a name="l00218"></a>00218 <span class="keywordflow">return</span> 0;
<a name="l00219"></a>00219 } <span class="keywordflow">else</span> {
<a name="l00220"></a>00220 <span class="keywordflow">while</span> ((len > 0) && src_pos < r_size) {
<a name="l00221"></a>00221 src_pos++;
<a name="l00222"></a>00222 src_pos += len;
<a name="l00223"></a>00223 len = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(r)[src_pos];
<a name="l00224"></a>00224 i++;
<a name="l00225"></a>00225 }
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228 <span class="keywordflow">return</span> i;
<a name="l00229"></a>00229 }
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00232"></a><a class="code" href="dname_8h.html#ab5c122793ea42c505994a577e970bd4c">00232</a> <a class="code" href="dname_8c.html#ab2fbb24f06efc24933c0fb3ee453933d" title="Create a new dname rdf from a string.">ldns_dname_new</a>(uint16_t s, <span class="keywordtype">void</span> *d)
<a name="l00233"></a>00233 {
<a name="l00234"></a>00234 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *rd;
<a name="l00235"></a>00235
<a name="l00236"></a>00236 rd = <a class="code" href="util_8h.html#a828619b138fdeb9756cd3c874d0551c1" title="Memory management macros.">LDNS_MALLOC</a>(<a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a>);
<a name="l00237"></a>00237 <span class="keywordflow">if</span> (!rd) {
<a name="l00238"></a>00238 <span class="keywordflow">return</span> NULL;
<a name="l00239"></a>00239 }
<a name="l00240"></a>00240 <a class="code" href="rdata_8c.html#adcc8bc77944f8e93130adbfd0801a5a0" title="sets the size of the rdf.">ldns_rdf_set_size</a>(rd, s);
<a name="l00241"></a>00241 <a class="code" href="rdata_8c.html#a2f80552989f7280571e01fcc041d50e3" title="sets the size of the rdf.">ldns_rdf_set_type</a>(rd, <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>);
<a name="l00242"></a>00242 <a class="code" href="rdata_8c.html#ad63c123e8c79ba3f51491655982a2a15" title="sets the size of the rdf.">ldns_rdf_set_data</a>(rd, d);
<a name="l00243"></a>00243 <span class="keywordflow">return</span> rd;
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00247"></a><a class="code" href="dname_8h.html#af4963d4ae086b1d77a58c6f757a00462">00247</a> <a class="code" href="dname_8c.html#af4963d4ae086b1d77a58c6f757a00462" title="creates a new dname rdf from a string.">ldns_dname_new_frm_str</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *str)
<a name="l00248"></a>00248 {
<a name="l00249"></a>00249 <span class="keywordflow">return</span> <a class="code" href="rdata_8c.html#a6d9420f844225b552ffc3e84a37741ba" title="creates a new rdf from a string.">ldns_rdf_new_frm_str</a>(<a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>, str);
<a name="l00250"></a>00250 }
<a name="l00251"></a>00251
<a name="l00252"></a>00252 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00253"></a><a class="code" href="dname_8h.html#a27f7af7725d4eb5fc54c50e10c1ba88f">00253</a> <a class="code" href="dname_8c.html#a27f7af7725d4eb5fc54c50e10c1ba88f" title="Create a new dname rdf from data (the data is copied)">ldns_dname_new_frm_data</a>(uint16_t size, <span class="keyword">const</span> <span class="keywordtype">void</span> *data)
<a name="l00254"></a>00254 {
<a name="l00255"></a>00255 <span class="keywordflow">return</span> <a class="code" href="rdata_8c.html#afeaa67dccf9c97ac9209776936279319" title="allocates a new rdf structure and fills it.">ldns_rdf_new_frm_data</a>(<a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>, size, data);
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="keywordtype">void</span>
<a name="l00259"></a><a class="code" href="dname_8h.html#aab93b3e88152119737f42d624fd34795">00259</a> <a class="code" href="dname_8c.html#a86a798d6401b11e85d4592b1609ffd8f" title="Put a dname into canonical fmt - ie.">ldns_dname2canonical</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *rd)
<a name="l00260"></a>00260 {
<a name="l00261"></a>00261 uint8_t *rdd;
<a name="l00262"></a>00262 uint16_t i;
<a name="l00263"></a>00263
<a name="l00264"></a>00264 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(rd) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>) {
<a name="l00265"></a>00265 <span class="keywordflow">return</span>;
<a name="l00266"></a>00266 }
<a name="l00267"></a>00267
<a name="l00268"></a>00268 rdd = (uint8_t*)<a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rd);
<a name="l00269"></a>00269 <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rd); i++, rdd++) {
<a name="l00270"></a>00270 *rdd = (uint8_t)<a class="code" href="dname_8h.html#ae9ea4a6bb05de529f2c60d452f76f48f">LDNS_DNAME_NORMALIZE</a>((<span class="keywordtype">int</span>)*rdd);
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="keywordtype">bool</span>
<a name="l00275"></a><a class="code" href="dname_8h.html#a6caadb8042c9cf755d3d5defcfbd44eb">00275</a> <a class="code" href="dname_8c.html#a6caadb8042c9cf755d3d5defcfbd44eb" title="test wether the name sub falls under parent (i.e.">ldns_dname_is_subdomain</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *sub, <span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *parent)
<a name="l00276"></a>00276 {
<a name="l00277"></a>00277 uint8_t sub_lab;
<a name="l00278"></a>00278 uint8_t par_lab;
<a name="l00279"></a>00279 int8_t i, j;
<a name="l00280"></a>00280 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *tmp_sub = NULL;
<a name="l00281"></a>00281 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *tmp_par = NULL;
<a name="l00282"></a>00282 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *sub_clone;
<a name="l00283"></a>00283 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *parent_clone;
<a name="l00284"></a>00284 <span class="keywordtype">bool</span> result = <span class="keyword">true</span>;
<a name="l00285"></a>00285
<a name="l00286"></a>00286 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(sub) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a> ||
<a name="l00287"></a>00287 <a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(parent) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a> ||
<a name="l00288"></a>00288 <a class="code" href="rdata_8c.html#ae5813414a2392d94d20ec1f9f3705ad5" title="compares two rdf's on their wire formats.">ldns_rdf_compare</a>(sub, parent) == 0) {
<a name="l00289"></a>00289 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00290"></a>00290 }
<a name="l00291"></a>00291
<a name="l00292"></a>00292 <span class="comment">/* would be nicer if we do not have to clone... */</span>
<a name="l00293"></a>00293 sub_clone = <a class="code" href="dname_8c.html#a474f7f019180b294da551d00a111149e" title="Clones the given dname from the nth label on.">ldns_dname_clone_from</a>(sub, 0);
<a name="l00294"></a>00294 parent_clone = <a class="code" href="dname_8c.html#a474f7f019180b294da551d00a111149e" title="Clones the given dname from the nth label on.">ldns_dname_clone_from</a>(parent, 0);
<a name="l00295"></a>00295 <a class="code" href="dname_8c.html#a86a798d6401b11e85d4592b1609ffd8f" title="Put a dname into canonical fmt - ie.">ldns_dname2canonical</a>(sub_clone);
<a name="l00296"></a>00296 <a class="code" href="dname_8c.html#a86a798d6401b11e85d4592b1609ffd8f" title="Put a dname into canonical fmt - ie.">ldns_dname2canonical</a>(parent_clone);
<a name="l00297"></a>00297
<a name="l00298"></a>00298 sub_lab = <a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(sub_clone);
<a name="l00299"></a>00299 par_lab = <a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(parent_clone);
<a name="l00300"></a>00300
<a name="l00301"></a>00301 <span class="comment">/* if sub sits above parent, it cannot be a child/sub domain */</span>
<a name="l00302"></a>00302 <span class="keywordflow">if</span> (sub_lab < par_lab) {
<a name="l00303"></a>00303 result = <span class="keyword">false</span>;
<a name="l00304"></a>00304 } <span class="keywordflow">else</span> {
<a name="l00305"></a>00305 <span class="comment">/* check all labels the from the parent labels, from right to left.</span>
<a name="l00306"></a>00306 <span class="comment"> * When they /all/ match we have found a subdomain</span>
<a name="l00307"></a>00307 <span class="comment"> */</span>
<a name="l00308"></a>00308 j = sub_lab - 1; <span class="comment">/* we count from zero, thank you */</span>
<a name="l00309"></a>00309 <span class="keywordflow">for</span> (i = par_lab -1; i >= 0; i--) {
<a name="l00310"></a>00310 tmp_sub = <a class="code" href="dname_8c.html#aee5c4a1b633f7c41d8788610bb2369a8" title="look inside the rdf and if it is an LDNS_RDF_TYPE_DNAME try and retrieve a specific label...">ldns_dname_label</a>(sub_clone, j);
<a name="l00311"></a>00311 tmp_par = <a class="code" href="dname_8c.html#aee5c4a1b633f7c41d8788610bb2369a8" title="look inside the rdf and if it is an LDNS_RDF_TYPE_DNAME try and retrieve a specific label...">ldns_dname_label</a>(parent_clone, i);
<a name="l00312"></a>00312 <span class="keywordflow">if</span> (!tmp_sub || !tmp_par) {
<a name="l00313"></a>00313 <span class="comment">/* deep free does null check */</span>
<a name="l00314"></a>00314 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(tmp_sub);
<a name="l00315"></a>00315 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(tmp_par);
<a name="l00316"></a>00316 result = <span class="keyword">false</span>;
<a name="l00317"></a>00317 <span class="keywordflow">break</span>;
<a name="l00318"></a>00318 }
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#ae5813414a2392d94d20ec1f9f3705ad5" title="compares two rdf's on their wire formats.">ldns_rdf_compare</a>(tmp_sub, tmp_par) != 0) {
<a name="l00321"></a>00321 <span class="comment">/* they are not equal */</span>
<a name="l00322"></a>00322 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(tmp_sub);
<a name="l00323"></a>00323 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(tmp_par);
<a name="l00324"></a>00324 result = <span class="keyword">false</span>;
<a name="l00325"></a>00325 <span class="keywordflow">break</span>;
<a name="l00326"></a>00326 }
<a name="l00327"></a>00327 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(tmp_sub);
<a name="l00328"></a>00328 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(tmp_par);
<a name="l00329"></a>00329 j--;
<a name="l00330"></a>00330 }
<a name="l00331"></a>00331 }
<a name="l00332"></a>00332 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(sub_clone);
<a name="l00333"></a>00333 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(parent_clone);
<a name="l00334"></a>00334 <span class="keywordflow">return</span> result;
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="keywordtype">int</span>
<a name="l00338"></a><a class="code" href="dname_8h.html#a6faaee00444aad0fde1c672216e5a8b7">00338</a> <a class="code" href="dname_8c.html#a6faaee00444aad0fde1c672216e5a8b7" title="Compares the two dname rdf's according to the algorithm for ordering in RFC4034 Section 6...">ldns_dname_compare</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *dname1, <span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *dname2)
<a name="l00339"></a>00339 {
<a name="l00340"></a>00340 <span class="keywordtype">size_t</span> lc1, lc2, lc1f, lc2f;
<a name="l00341"></a>00341 <span class="keywordtype">size_t</span> i;
<a name="l00342"></a>00342 <span class="keywordtype">int</span> result = 0;
<a name="l00343"></a>00343 uint8_t *lp1, *lp2;
<a name="l00344"></a>00344
<a name="l00345"></a>00345 <span class="comment">/* see RFC4034 for this algorithm */</span>
<a name="l00346"></a>00346 <span class="comment">/* this algorithm assumes the names are normalized to case */</span>
<a name="l00347"></a>00347
<a name="l00348"></a>00348 <span class="comment">/* only when both are not NULL we can say anything about them */</span>
<a name="l00349"></a>00349 <span class="keywordflow">if</span> (!dname1 && !dname2) {
<a name="l00350"></a>00350 <span class="keywordflow">return</span> 0;
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352 <span class="keywordflow">if</span> (!dname1 || !dname2) {
<a name="l00353"></a>00353 <span class="keywordflow">return</span> -1;
<a name="l00354"></a>00354 }
<a name="l00355"></a>00355 <span class="comment">/* asserts must happen later as we are looking in the</span>
<a name="l00356"></a>00356 <span class="comment"> * dname, which could be NULL. But this case is handled</span>
<a name="l00357"></a>00357 <span class="comment"> * above</span>
<a name="l00358"></a>00358 <span class="comment"> */</span>
<a name="l00359"></a>00359 assert(<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(dname1) == <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>);
<a name="l00360"></a>00360 assert(<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(dname2) == <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>);
<a name="l00361"></a>00361
<a name="l00362"></a>00362 lc1 = <a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(dname1);
<a name="l00363"></a>00363 lc2 = <a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(dname2);
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="keywordflow">if</span> (lc1 == 0 && lc2 == 0) {
<a name="l00366"></a>00366 <span class="keywordflow">return</span> 0;
<a name="l00367"></a>00367 }
<a name="l00368"></a>00368 <span class="keywordflow">if</span> (lc1 == 0) {
<a name="l00369"></a>00369 <span class="keywordflow">return</span> -1;
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371 <span class="keywordflow">if</span> (lc2 == 0) {
<a name="l00372"></a>00372 <span class="keywordflow">return</span> 1;
<a name="l00373"></a>00373 }
<a name="l00374"></a>00374 lc1--;
<a name="l00375"></a>00375 lc2--;
<a name="l00376"></a>00376 <span class="comment">/* we start at the last label */</span>
<a name="l00377"></a>00377 <span class="keywordflow">while</span> (<span class="keyword">true</span>) {
<a name="l00378"></a>00378 <span class="comment">/* find the label first */</span>
<a name="l00379"></a>00379 lc1f = lc1;
<a name="l00380"></a>00380 lp1 = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(dname1);
<a name="l00381"></a>00381 <span class="keywordflow">while</span> (lc1f > 0) {
<a name="l00382"></a>00382 lp1 += *lp1 + 1;
<a name="l00383"></a>00383 lc1f--;
<a name="l00384"></a>00384 }
<a name="l00385"></a>00385
<a name="l00386"></a>00386 <span class="comment">/* and find the other one */</span>
<a name="l00387"></a>00387 lc2f = lc2;
<a name="l00388"></a>00388 lp2 = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(dname2);
<a name="l00389"></a>00389 <span class="keywordflow">while</span> (lc2f > 0) {
<a name="l00390"></a>00390 lp2 += *lp2 + 1;
<a name="l00391"></a>00391 lc2f--;
<a name="l00392"></a>00392 }
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="comment">/* now check the label character for character. */</span>
<a name="l00395"></a>00395 <span class="keywordflow">for</span> (i = 1; i < (size_t)(*lp1 + 1); i++) {
<a name="l00396"></a>00396 <span class="keywordflow">if</span> (i > *lp2) {
<a name="l00397"></a>00397 <span class="comment">/* apparently label 1 is larger */</span>
<a name="l00398"></a>00398 result = 1;
<a name="l00399"></a>00399 <span class="keywordflow">goto</span> done;
<a name="l00400"></a>00400 }
<a name="l00401"></a>00401 <span class="keywordflow">if</span> (<a class="code" href="dname_8h.html#ae9ea4a6bb05de529f2c60d452f76f48f">LDNS_DNAME_NORMALIZE</a>((<span class="keywordtype">int</span>) *(lp1 + i)) <
<a name="l00402"></a>00402 <a class="code" href="dname_8h.html#ae9ea4a6bb05de529f2c60d452f76f48f">LDNS_DNAME_NORMALIZE</a>((<span class="keywordtype">int</span>) *(lp2 + i))) {
<a name="l00403"></a>00403 result = -1;
<a name="l00404"></a>00404 <span class="keywordflow">goto</span> done;
<a name="l00405"></a>00405 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="dname_8h.html#ae9ea4a6bb05de529f2c60d452f76f48f">LDNS_DNAME_NORMALIZE</a>((<span class="keywordtype">int</span>) *(lp1 + i)) >
<a name="l00406"></a>00406 <a class="code" href="dname_8h.html#ae9ea4a6bb05de529f2c60d452f76f48f">LDNS_DNAME_NORMALIZE</a>((<span class="keywordtype">int</span>) *(lp2 + i))) {
<a name="l00407"></a>00407 result = 1;
<a name="l00408"></a>00408 <span class="keywordflow">goto</span> done;
<a name="l00409"></a>00409 }
<a name="l00410"></a>00410 }
<a name="l00411"></a>00411 <span class="keywordflow">if</span> (*lp1 < *lp2) {
<a name="l00412"></a>00412 <span class="comment">/* apparently label 2 is larger */</span>
<a name="l00413"></a>00413 result = -1;
<a name="l00414"></a>00414 <span class="keywordflow">goto</span> done;
<a name="l00415"></a>00415 }
<a name="l00416"></a>00416 <span class="keywordflow">if</span> (lc1 == 0 && lc2 > 0) {
<a name="l00417"></a>00417 result = -1;
<a name="l00418"></a>00418 <span class="keywordflow">goto</span> done;
<a name="l00419"></a>00419 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (lc1 > 0 && lc2 == 0) {
<a name="l00420"></a>00420 result = 1;
<a name="l00421"></a>00421 <span class="keywordflow">goto</span> done;
<a name="l00422"></a>00422 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (lc1 == 0 && lc2 == 0) {
<a name="l00423"></a>00423 result = 0;
<a name="l00424"></a>00424 <span class="keywordflow">goto</span> done;
<a name="l00425"></a>00425 }
<a name="l00426"></a>00426 lc1--;
<a name="l00427"></a>00427 lc2--;
<a name="l00428"></a>00428 }
<a name="l00429"></a>00429
<a name="l00430"></a>00430 done:
<a name="l00431"></a>00431 <span class="keywordflow">return</span> result;
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433
<a name="l00434"></a>00434 <span class="keywordtype">int</span>
<a name="l00435"></a><a class="code" href="dname_8h.html#a0f7736b29e88e9513fb42f0edd3e7d25">00435</a> <a class="code" href="dname_8c.html#a0f7736b29e88e9513fb42f0edd3e7d25" title="Check if dname is a wildcard, starts with *.">ldns_dname_is_wildcard</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a>* dname)
<a name="l00436"></a>00436 {
<a name="l00437"></a>00437 <span class="keywordflow">return</span> ( <a class="code" href="dname_8c.html#add94977e68ceab64921e9ae69cd92ef3" title="count the number of labels inside a LDNS_RDF_DNAME type rdf.">ldns_dname_label_count</a>(dname) > 0 &&
<a name="l00438"></a>00438 <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(dname)[0] == 1 &&
<a name="l00439"></a>00439 <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(dname)[1] == <span class="charliteral">'*'</span>);
<a name="l00440"></a>00440 }
<a name="l00441"></a>00441
<a name="l00442"></a>00442 <span class="keywordtype">int</span>
<a name="l00443"></a><a class="code" href="dname_8h.html#a34b0d6a4a5026094605f0b7e7427c803">00443</a> <a class="code" href="dname_8c.html#a34b0d6a4a5026094605f0b7e7427c803" title="Checks whether the dname matches the given wildcard.">ldns_dname_match_wildcard</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *dname, <span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *wildcard)
<a name="l00444"></a>00444 {
<a name="l00445"></a>00445 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *wc_chopped;
<a name="l00446"></a>00446 <span class="keywordtype">int</span> result;
<a name="l00447"></a>00447 <span class="comment">/* check whether it really is a wildcard */</span>
<a name="l00448"></a>00448 <span class="keywordflow">if</span> (<a class="code" href="dname_8c.html#a0f7736b29e88e9513fb42f0edd3e7d25" title="Check if dname is a wildcard, starts with *.">ldns_dname_is_wildcard</a>(wildcard)) {
<a name="l00449"></a>00449 <span class="comment">/* ok, so the dname needs to be a subdomain of the wildcard</span>
<a name="l00450"></a>00450 <span class="comment"> * without the *</span>
<a name="l00451"></a>00451 <span class="comment"> */</span>
<a name="l00452"></a>00452 wc_chopped = <a class="code" href="dname_8c.html#aa2b0413896e1c06fd2cc685d4026d8ac" title="chop one label off the left side of a dname.">ldns_dname_left_chop</a>(wildcard);
<a name="l00453"></a>00453 result = (int) <a class="code" href="dname_8c.html#a6caadb8042c9cf755d3d5defcfbd44eb" title="test wether the name sub falls under parent (i.e.">ldns_dname_is_subdomain</a>(dname, wc_chopped);
<a name="l00454"></a>00454 <a class="code" href="rdata_8c.html#a47cb2779f76f2f6561ff8ede8e41afec" title="frees a rdf structure _and_ frees the data.">ldns_rdf_deep_free</a>(wc_chopped);
<a name="l00455"></a>00455 } <span class="keywordflow">else</span> {
<a name="l00456"></a>00456 result = (<a class="code" href="dname_8c.html#a6faaee00444aad0fde1c672216e5a8b7" title="Compares the two dname rdf's according to the algorithm for ordering in RFC4034 Section 6...">ldns_dname_compare</a>(dname, wildcard) == 0);
<a name="l00457"></a>00457 }
<a name="l00458"></a>00458 <span class="keywordflow">return</span> result;
<a name="l00459"></a>00459 }
<a name="l00460"></a>00460
<a name="l00461"></a>00461 <span class="comment">/* nsec test: does prev <= middle < next</span>
<a name="l00462"></a>00462 <span class="comment"> * -1 = yes</span>
<a name="l00463"></a>00463 <span class="comment"> * 0 = error/can't tell</span>
<a name="l00464"></a>00464 <span class="comment"> * 1 = no</span>
<a name="l00465"></a>00465 <span class="comment"> */</span>
<a name="l00466"></a>00466 <span class="keywordtype">int</span>
<a name="l00467"></a><a class="code" href="dname_8h.html#aa60c1e59963ef052fe211949032baace">00467</a> <a class="code" href="dname_8c.html#aa60c1e59963ef052fe211949032baace" title="check if middle lays in the interval defined by prev and next prev <= middle < next.">ldns_dname_interval</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *prev, <span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *middle,
<a name="l00468"></a>00468 <span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *next)
<a name="l00469"></a>00469 {
<a name="l00470"></a>00470 <span class="keywordtype">int</span> prev_check, next_check;
<a name="l00471"></a>00471
<a name="l00472"></a>00472 assert(<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(prev) == <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>);
<a name="l00473"></a>00473 assert(<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(middle) == <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>);
<a name="l00474"></a>00474 assert(<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(next) == <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>);
<a name="l00475"></a>00475
<a name="l00476"></a>00476 prev_check = <a class="code" href="dname_8c.html#a6faaee00444aad0fde1c672216e5a8b7" title="Compares the two dname rdf's according to the algorithm for ordering in RFC4034 Section 6...">ldns_dname_compare</a>(prev, middle);
<a name="l00477"></a>00477 next_check = <a class="code" href="dname_8c.html#a6faaee00444aad0fde1c672216e5a8b7" title="Compares the two dname rdf's according to the algorithm for ordering in RFC4034 Section 6...">ldns_dname_compare</a>(middle, next);
<a name="l00478"></a>00478 <span class="comment">/* <= next. This cannot be the case for nsec, because then we would</span>
<a name="l00479"></a>00479 <span class="comment"> * have gotten the nsec of next...</span>
<a name="l00480"></a>00480 <span class="comment"> */</span>
<a name="l00481"></a>00481 <span class="keywordflow">if</span> (next_check == 0) {
<a name="l00482"></a>00482 <span class="keywordflow">return</span> 0;
<a name="l00483"></a>00483 }
<a name="l00484"></a>00484
<a name="l00485"></a>00485 <span class="comment">/* <= */</span>
<a name="l00486"></a>00486 <span class="keywordflow">if</span> ((prev_check == -1 || prev_check == 0) &&
<a name="l00487"></a>00487 <span class="comment">/* < */</span>
<a name="l00488"></a>00488 next_check == -1) {
<a name="l00489"></a>00489 <span class="keywordflow">return</span> -1;
<a name="l00490"></a>00490 } <span class="keywordflow">else</span> {
<a name="l00491"></a>00491 <span class="keywordflow">return</span> 1;
<a name="l00492"></a>00492 }
<a name="l00493"></a>00493 }
<a name="l00494"></a>00494
<a name="l00495"></a>00495
<a name="l00496"></a>00496 <span class="keywordtype">bool</span>
<a name="l00497"></a><a class="code" href="dname_8h.html#a00b0d6d05c70e4e2f5e6193c8ed6f430">00497</a> <a class="code" href="dname_8c.html#a00b0d6d05c70e4e2f5e6193c8ed6f430" title="Checks whether the given dname string is absolute (i.e.">ldns_dname_str_absolute</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *dname_str)
<a name="l00498"></a>00498 {
<a name="l00499"></a>00499 <span class="keyword">const</span> <span class="keywordtype">char</span>* s;
<a name="l00500"></a>00500 <span class="keywordflow">if</span>(dname_str && strcmp(dname_str, <span class="stringliteral">"."</span>) == 0)
<a name="l00501"></a>00501 <span class="keywordflow">return</span> 1;
<a name="l00502"></a>00502 <span class="keywordflow">if</span>(!dname_str || strlen(dname_str) < 2)
<a name="l00503"></a>00503 <span class="keywordflow">return</span> 0;
<a name="l00504"></a>00504 <span class="keywordflow">if</span>(dname_str[strlen(dname_str) - 1] != <span class="charliteral">'.'</span>)
<a name="l00505"></a>00505 <span class="keywordflow">return</span> 0;
<a name="l00506"></a>00506 <span class="keywordflow">if</span>(dname_str[strlen(dname_str) - 2] != <span class="charliteral">'\\'</span>)
<a name="l00507"></a>00507 <span class="keywordflow">return</span> 1; <span class="comment">/* ends in . and no \ before it */</span>
<a name="l00508"></a>00508 <span class="comment">/* so we have the case of ends in . and there is \ before it */</span>
<a name="l00509"></a>00509 <span class="keywordflow">for</span>(s=dname_str; *s; s++) {
<a name="l00510"></a>00510 <span class="keywordflow">if</span>(*s == <span class="charliteral">'\\'</span>) {
<a name="l00511"></a>00511 <span class="keywordflow">if</span>(s[1] && s[2] && s[3] <span class="comment">/* check length */</span>
<a name="l00512"></a>00512 && isdigit(s[1]) && isdigit(s[2]) &&
<a name="l00513"></a>00513 isdigit(s[3]))
<a name="l00514"></a>00514 s += 3;
<a name="l00515"></a>00515 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(!s[1] || isdigit(s[1])) <span class="comment">/* escape of nul,0-9 */</span>
<a name="l00516"></a>00516 <span class="keywordflow">return</span> 0; <span class="comment">/* parse error */</span>
<a name="l00517"></a>00517 <span class="keywordflow">else</span> s++; <span class="comment">/* another character escaped */</span>
<a name="l00518"></a>00518 }
<a name="l00519"></a>00519 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(!*(s+1) && *s == <span class="charliteral">'.'</span>)
<a name="l00520"></a>00520 <span class="keywordflow">return</span> 1; <span class="comment">/* trailing dot, unescaped */</span>
<a name="l00521"></a>00521 }
<a name="l00522"></a>00522 <span class="keywordflow">return</span> 0;
<a name="l00523"></a>00523 }
<a name="l00524"></a>00524
<a name="l00525"></a>00525 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *
<a name="l00526"></a><a class="code" href="dname_8h.html#aee5c4a1b633f7c41d8788610bb2369a8">00526</a> <a class="code" href="dname_8c.html#aee5c4a1b633f7c41d8788610bb2369a8" title="look inside the rdf and if it is an LDNS_RDF_TYPE_DNAME try and retrieve a specific label...">ldns_dname_label</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *rdf, uint8_t labelpos)
<a name="l00527"></a>00527 {
<a name="l00528"></a>00528 uint8_t labelcnt;
<a name="l00529"></a>00529 uint16_t src_pos;
<a name="l00530"></a>00530 uint16_t len;
<a name="l00531"></a>00531 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *tmpnew;
<a name="l00532"></a>00532 <span class="keywordtype">size_t</span> s;
<a name="l00533"></a>00533
<a name="l00534"></a>00534 <span class="keywordflow">if</span> (<a class="code" href="rdata_8c.html#a240f7f36c145f6189df4f14ca5bc3a82" title="returns the type of the rdf.">ldns_rdf_get_type</a>(rdf) != <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>) {
<a name="l00535"></a>00535 <span class="keywordflow">return</span> NULL;
<a name="l00536"></a>00536 }
<a name="l00537"></a>00537
<a name="l00538"></a>00538 labelcnt = 0;
<a name="l00539"></a>00539 src_pos = 0;
<a name="l00540"></a>00540 s = <a class="code" href="rdata_8c.html#acccb19af8b71b0c8d341d17946b46e8b" title="returns the size of the rdf.">ldns_rdf_size</a>(rdf);
<a name="l00541"></a>00541
<a name="l00542"></a>00542 len = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rdf)[src_pos]; <span class="comment">/* label start */</span>
<a name="l00543"></a>00543 <span class="keywordflow">while</span> ((len > 0) && src_pos < s) {
<a name="l00544"></a>00544 <span class="keywordflow">if</span> (labelcnt == labelpos) {
<a name="l00545"></a>00545 <span class="comment">/* found our label */</span>
<a name="l00546"></a>00546 tmpnew = <a class="code" href="util_8h.html#a828619b138fdeb9756cd3c874d0551c1" title="Memory management macros.">LDNS_MALLOC</a>(<a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a>);
<a name="l00547"></a>00547 <span class="keywordflow">if</span> (!tmpnew) {
<a name="l00548"></a>00548 <span class="keywordflow">return</span> NULL;
<a name="l00549"></a>00549 }
<a name="l00550"></a>00550 tmpnew-><a class="code" href="structldns__struct__rdf.html#a3da0a7204cd0f1de0aa08f354d7192cd" title="The type of the data.">_type</a> = <a class="code" href="rdata_8h.html#aaa92376014f0abbf0110ca6efd587bb9a72cb73467bcbfbb41168e2a2b4a8283a" title="domain name">LDNS_RDF_TYPE_DNAME</a>;
<a name="l00551"></a>00551 tmpnew-><a class="code" href="structldns__struct__rdf.html#aebe9fba8f24285b263f56674f17bc527" title="Pointer to the data (raw octets)">_data</a> = <a class="code" href="util_8h.html#aaad6949daea3c6cefd01d19300f6e21a">LDNS_XMALLOC</a>(uint8_t, len + 2);
<a name="l00552"></a>00552 <span class="keywordflow">if</span> (!tmpnew-><a class="code" href="structldns__struct__rdf.html#aebe9fba8f24285b263f56674f17bc527" title="Pointer to the data (raw octets)">_data</a>) {
<a name="l00553"></a>00553 <a class="code" href="util_8h.html#a5e13054aa9b3843e97514228a0bbe909">LDNS_FREE</a>(tmpnew);
<a name="l00554"></a>00554 <span class="keywordflow">return</span> NULL;
<a name="l00555"></a>00555 }
<a name="l00556"></a>00556 memset(tmpnew-><a class="code" href="structldns__struct__rdf.html#aebe9fba8f24285b263f56674f17bc527" title="Pointer to the data (raw octets)">_data</a>, 0, len + 2);
<a name="l00557"></a>00557 memcpy(tmpnew-><a class="code" href="structldns__struct__rdf.html#aebe9fba8f24285b263f56674f17bc527" title="Pointer to the data (raw octets)">_data</a>, <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rdf) + src_pos, len + 1);
<a name="l00558"></a>00558 tmpnew-><a class="code" href="structldns__struct__rdf.html#a47074e7c90d0181170317d7194fdc2f8" title="The size of the data (in octets)">_size</a> = len + 2;
<a name="l00559"></a>00559 <span class="keywordflow">return</span> tmpnew;
<a name="l00560"></a>00560 }
<a name="l00561"></a>00561 src_pos++;
<a name="l00562"></a>00562 src_pos += len;
<a name="l00563"></a>00563 len = <a class="code" href="rdata_8c.html#adc126e8f5417a3c1049242f93fde3602" title="returns the data of the rdf.">ldns_rdf_data</a>(rdf)[src_pos];
<a name="l00564"></a>00564 labelcnt++;
<a name="l00565"></a>00565 }
<a name="l00566"></a>00566 <span class="keywordflow">return</span> NULL;
<a name="l00567"></a>00567 }
</pre></div></div>
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