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<div class="title">update.c</div> </div>
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<a href="update_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* update.c</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * Functions for RFC 2136 Dynamic Update</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * Copyright (c) 2005-2008, NLnet Labs. All rights reserved.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * See LICENSE for the license.</span>
<a name="l00008"></a>00008 <span class="comment"> */</span>
<a name="l00009"></a>00009
<a name="l00010"></a>00010 <span class="preprocessor">#include <<a class="code" href="ldns_2config_8h.html">ldns/config.h</a>></span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <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="l00013"></a>00013
<a name="l00014"></a>00014 <span class="preprocessor">#include <strings.h></span>
<a name="l00015"></a>00015 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00016"></a>00016 <span class="preprocessor">#include <limits.h></span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="comment">/*</span>
<a name="l00019"></a>00019 <span class="comment"> * RFC 2136 sections mapped to RFC 1035:</span>
<a name="l00020"></a>00020 <span class="comment"> * zone/ZO -- QD/question</span>
<a name="l00021"></a>00021 <span class="comment"> * prerequisites/PR -- AN/answers</span>
<a name="l00022"></a>00022 <span class="comment"> * updates/UP -- NS/authority records</span>
<a name="l00023"></a>00023 <span class="comment"> * additional data/AD -- AR/additional records</span>
<a name="l00024"></a>00024 <span class="comment"> */</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *
<a name="l00027"></a><a class="code" href="update_8h.html#a9327850124da004a4a8f67fed9851106">00027</a> <a class="code" href="update_8c.html#ae854c6e2d7b6b10bf8ff30bd37ed4547" title="create an update packet from zone name, class and the rr lists">ldns_update_pkt_new</a>(<a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *zone_rdf, <a class="code" href="rr_8h.html#aa11e99c7e7c630e03373f2a2cafc4ee9">ldns_rr_class</a> c,
<a name="l00028"></a>00028 <a class="code" href="structldns__struct__rr__list.html" title="List or Set of Resource Records.">ldns_rr_list</a> *pr_rrlist, <a class="code" href="structldns__struct__rr__list.html" title="List or Set of Resource Records.">ldns_rr_list</a> *up_rrlist, <a class="code" href="structldns__struct__rr__list.html" title="List or Set of Resource Records.">ldns_rr_list</a> *ad_rrlist)
<a name="l00029"></a>00029 {
<a name="l00030"></a>00030 <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p;
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="keywordflow">if</span> (!zone_rdf || !up_rrlist) {
<a name="l00033"></a>00033 <span class="keywordflow">return</span> NULL;
<a name="l00034"></a>00034 }
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="keywordflow">if</span> (c == 0) {
<a name="l00037"></a>00037 c = <a class="code" href="rr_8h.html#adc72070b39f210fae670577de8136600a2ad89c0befc939420e3b1157c07a8b46" title="the Internet">LDNS_RR_CLASS_IN</a>;
<a name="l00038"></a>00038 }
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">/* Create packet, fill in Zone Section. */</span>
<a name="l00041"></a>00041 p = <a class="code" href="packet_8c.html#af7eee9c15b0f645d5b5855ef15c4596c" title="creates a packet with a query in it for the given name, type and class.">ldns_pkt_query_new</a>(zone_rdf, <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa367b06e16e9a68d994130aedec1c3bdb" title="marks the start of a zone of authority">LDNS_RR_TYPE_SOA</a>, c, <a class="code" href="packet_8h.html#adbf4098a01ab543ebbcbd329103cc8d9">LDNS_RD</a>);
<a name="l00042"></a>00042 <span class="keywordflow">if</span> (!p) {
<a name="l00043"></a>00043 <span class="keywordflow">return</span> NULL;
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045 zone_rdf = NULL; <span class="comment">/* No longer safe to use. */</span>
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <a class="code" href="packet_8c.html#a31253d7eb96356147df1b1437dab77c7" title="Set the packet's opcode.">ldns_pkt_set_opcode</a>(p, <a class="code" href="packet_8h.html#a7b6e5e8c3d0e09c0a51b5cb46a1f8e20ab8ce3392553e5a300419e05ec3a6ab2f">LDNS_PACKET_UPDATE</a>);
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <a class="code" href="rr_8c.html#a25181bd133a53f132abce4eefd8e33af" title="frees an rr_list structure and all rrs contained therein.">ldns_rr_list_deep_free</a>(p-><a class="code" href="structldns__struct__pkt.html#a24e50f4fff0dd22b42e75c37e66a2d23" title="Authority section.">_authority</a>);
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <a class="code" href="packet_8c.html#a50588a27c685da2c79a171cd29b5543c" title="directly set the auhority section">ldns_pkt_set_authority</a>(p, <a class="code" href="rr_8c.html#ae40b961189f215fba0bad6406088674a" title="clones an rrlist.">ldns_rr_list_clone</a>(up_rrlist));
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <a class="code" href="update_8c.html#ad8a4b2d66aac5936a25f194e81e40cc6" title="Set the up count.">ldns_update_set_upcount</a>(p, <a class="code" href="rr_8c.html#a7ac3192fe79ba66e47579bb2b267ce05" title="returns the number of rr's in an rr_list.">ldns_rr_list_rr_count</a>(up_rrlist));
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="keywordflow">if</span> (pr_rrlist) {
<a name="l00056"></a>00056 <a class="code" href="rr_8c.html#a25181bd133a53f132abce4eefd8e33af" title="frees an rr_list structure and all rrs contained therein.">ldns_rr_list_deep_free</a>(p-><a class="code" href="structldns__struct__pkt.html#a78f68b9ab9348943d27249fcc944e5e9" title="Answer section.">_answer</a>); <span class="comment">/*XXX access function */</span>
<a name="l00057"></a>00057 <a class="code" href="packet_8c.html#a827e3fc31071f434a591cf2ac1d8b895" title="directly set the answer section">ldns_pkt_set_answer</a>(p, <a class="code" href="rr_8c.html#ae40b961189f215fba0bad6406088674a" title="clones an rrlist.">ldns_rr_list_clone</a>(pr_rrlist));
<a name="l00058"></a>00058 <a class="code" href="update_8c.html#ace7ad313fbfac9de2575b79fb65a277e" title="Set the pr count.">ldns_update_set_prcount</a>(p, <a class="code" href="rr_8c.html#a7ac3192fe79ba66e47579bb2b267ce05" title="returns the number of rr's in an rr_list.">ldns_rr_list_rr_count</a>(pr_rrlist));
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordflow">if</span> (ad_rrlist) {
<a name="l00062"></a>00062 <a class="code" href="rr_8c.html#a25181bd133a53f132abce4eefd8e33af" title="frees an rr_list structure and all rrs contained therein.">ldns_rr_list_deep_free</a>(p-><a class="code" href="structldns__struct__pkt.html#ad4cf19c78bd6cca0131b2536b7c78c99" title="Additional section.">_additional</a>);
<a name="l00063"></a>00063 <a class="code" href="packet_8c.html#a3143ac76c5f71627ec670e89d691430b" title="directly set the additional section">ldns_pkt_set_additional</a>(p, <a class="code" href="rr_8c.html#ae40b961189f215fba0bad6406088674a" title="clones an rrlist.">ldns_rr_list_clone</a>(ad_rrlist));
<a name="l00064"></a>00064 <a class="code" href="update_8c.html#a2cf70a879aaf7734c3f4d4025b0a80ba" title="Set the ad count.">ldns_update_set_adcount</a>(p, <a class="code" href="rr_8c.html#a7ac3192fe79ba66e47579bb2b267ce05" title="returns the number of rr's in an rr_list.">ldns_rr_list_rr_count</a>(ad_rrlist));
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066 <span class="keywordflow">return</span> p;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <a class="code" href="error_8h.html#aaa6d98f86f535cf87b83b89e91f488f9">ldns_status</a>
<a name="l00070"></a><a class="code" href="update_8h.html#aae08c7ba6a64ef56c0e01d73ee3d2850">00070</a> <a class="code" href="update_8c.html#aae08c7ba6a64ef56c0e01d73ee3d2850" title="add tsig credentials to a packet from a resolver">ldns_update_pkt_tsig_add</a>(<a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p, <a class="code" href="structldns__struct__resolver.html" title="DNS stub resolver structure.">ldns_resolver</a> *r)
<a name="l00071"></a>00071 {
<a name="l00072"></a>00072 <span class="preprocessor">#ifdef HAVE_SSL</span>
<a name="l00073"></a>00073 <span class="preprocessor"></span> uint16_t fudge = 300; <span class="comment">/* Recommended fudge. [RFC2845 6.4] */</span>
<a name="l00074"></a>00074 <span class="keywordflow">if</span> (<a class="code" href="resolver_8c.html#a262ac7450159c115060ec464a4a5af6e" title="Return the tsig keyname as used by the nameserver.">ldns_resolver_tsig_keyname</a>(r) && <a class="code" href="resolver_8c.html#abc7e0d0e3960348f774164d34af3013b" title="Return the tsig keydata as used by the nameserver.">ldns_resolver_tsig_keydata</a>(r))
<a name="l00075"></a>00075 <span class="keywordflow">return</span> <a class="code" href="tsig_8c.html#a77501f37821c68328382bccdca956805" title="creates a tsig rr for the given packet and key.">ldns_pkt_tsig_sign</a>(p, <a class="code" href="resolver_8c.html#a262ac7450159c115060ec464a4a5af6e" title="Return the tsig keyname as used by the nameserver.">ldns_resolver_tsig_keyname</a>(r),
<a name="l00076"></a>00076 <a class="code" href="resolver_8c.html#abc7e0d0e3960348f774164d34af3013b" title="Return the tsig keydata as used by the nameserver.">ldns_resolver_tsig_keydata</a>(r), fudge,
<a name="l00077"></a>00077 <a class="code" href="resolver_8c.html#a1fd4b31d628081e3d6dafdd389bfea0a" title="Return the tsig algorithm as used by the nameserver.">ldns_resolver_tsig_algorithm</a>(r), NULL);
<a name="l00078"></a>00078 <span class="preprocessor">#else</span>
<a name="l00079"></a>00079 <span class="preprocessor"></span> <span class="comment">/* do nothing */</span>
<a name="l00080"></a>00080 (void)p;
<a name="l00081"></a>00081 (void)r;
<a name="l00082"></a>00082 <span class="preprocessor">#endif </span><span class="comment">/* HAVE_SSL */</span>
<a name="l00083"></a>00083 <span class="comment">/* No TSIG to do. */</span>
<a name="l00084"></a>00084 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>;
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="comment">/* Move to higher.c or similar? */</span>
<a name="l00088"></a>00088 <span class="comment">/* XXX doc */</span>
<a name="l00089"></a>00089 <a class="code" href="error_8h.html#aaa6d98f86f535cf87b83b89e91f488f9">ldns_status</a>
<a name="l00090"></a><a class="code" href="update_8h.html#afbb6c6bba0fee91a12dae1883c01651e">00090</a> <a class="code" href="update_8c.html#afbb6c6bba0fee91a12dae1883c01651e">ldns_update_soa_mname</a>(<a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *zone, <a class="code" href="structldns__struct__resolver.html" title="DNS stub resolver structure.">ldns_resolver</a> *r,
<a name="l00091"></a>00091 <a class="code" href="rr_8h.html#aa11e99c7e7c630e03373f2a2cafc4ee9">ldns_rr_class</a> c, <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> **mname)
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 <a class="code" href="structldns__struct__rr.html" title="Resource Record.">ldns_rr</a> *soa_rr;
<a name="l00094"></a>00094 <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *query, *resp;
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">/* Nondestructive, so clone 'zone' here */</span>
<a name="l00097"></a>00097 query = <a class="code" href="packet_8c.html#af7eee9c15b0f645d5b5855ef15c4596c" title="creates a packet with a query in it for the given name, type and class.">ldns_pkt_query_new</a>(<a class="code" href="rdata_8c.html#af9a39f2f8b749efa6a20ba91cb696961" title="clones a rdf structure.">ldns_rdf_clone</a>(zone), <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa367b06e16e9a68d994130aedec1c3bdb" title="marks the start of a zone of authority">LDNS_RR_TYPE_SOA</a>,
<a name="l00098"></a>00098 c, <a class="code" href="packet_8h.html#adbf4098a01ab543ebbcbd329103cc8d9">LDNS_RD</a>);
<a name="l00099"></a>00099 <span class="keywordflow">if</span> (!query) {
<a name="l00100"></a>00100 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <a class="code" href="packet_8c.html#a34c00d474f6d869ff40829e20c95e35a" title="Set the packet's id to a random value.">ldns_pkt_set_random_id</a>(query);
<a name="l00104"></a>00104 <span class="keywordflow">if</span> (<a class="code" href="resolver_8c.html#af90dc5b176e210bc66d9346875a1c8e8" title="Send the given packet to a nameserver.">ldns_resolver_send_pkt</a>(&resp, r, query) != <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>) {
<a name="l00105"></a>00105 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00106"></a>00106 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00109"></a>00109 <span class="keywordflow">if</span> (!resp) {
<a name="l00110"></a>00110 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="comment">/* Expect a SOA answer. */</span>
<a name="l00114"></a>00114 *mname = NULL;
<a name="l00115"></a>00115 <span class="keywordflow">while</span> ((soa_rr = <a class="code" href="rr_8c.html#a09395bafcd69ac1267639c3fa81e8b0f" title="pops the last rr from an rrlist.">ldns_rr_list_pop_rr</a>(<a class="code" href="packet_8c.html#abe3507def1f75f9a369334f75a4b4799" title="Return the packet's answer section.">ldns_pkt_answer</a>(resp)))) {
<a name="l00116"></a>00116 <span class="keywordflow">if</span> (<a class="code" href="rr_8c.html#a849c616b8e8d87b8c047a8b41be21228" title="returns the type of the rr.">ldns_rr_get_type</a>(soa_rr) != <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa367b06e16e9a68d994130aedec1c3bdb" title="marks the start of a zone of authority">LDNS_RR_TYPE_SOA</a>
<a name="l00117"></a>00117 || <a class="code" href="rr_8c.html#aed836e7b90f7c11993d92a4569d7e29b" title="returns the rdata field member counter.">ldns_rr_rdf</a>(soa_rr, 0) == NULL)
<a name="l00118"></a>00118 <span class="keywordflow">continue</span>;
<a name="l00119"></a>00119 <span class="comment">/* [RFC1035 3.3.13] */</span>
<a name="l00120"></a>00120 *mname = <a class="code" href="rdata_8c.html#af9a39f2f8b749efa6a20ba91cb696961" title="clones a rdf structure.">ldns_rdf_clone</a>(<a class="code" href="rr_8c.html#aed836e7b90f7c11993d92a4569d7e29b" title="returns the rdata field member counter.">ldns_rr_rdf</a>(soa_rr, 0));
<a name="l00121"></a>00121 <span class="keywordflow">break</span>;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(resp);
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordflow">return</span> *mname ? <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a> : <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127
<a name="l00128"></a>00128 <span class="comment">/* Try to get zone and MNAME from SOA queries. */</span>
<a name="l00129"></a>00129 <a class="code" href="error_8h.html#aaa6d98f86f535cf87b83b89e91f488f9">ldns_status</a>
<a name="l00130"></a><a class="code" href="update_8h.html#a6aa8c187d066f4d82b8e3b3aabc54fa8">00130</a> <a class="code" href="update_8c.html#a6aa8c187d066f4d82b8e3b3aabc54fa8">ldns_update_soa_zone_mname</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *fqdn, <a class="code" href="structldns__struct__resolver.html" title="DNS stub resolver structure.">ldns_resolver</a> *r,
<a name="l00131"></a>00131 <a class="code" href="rr_8h.html#aa11e99c7e7c630e03373f2a2cafc4ee9">ldns_rr_class</a> c, <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> **zone_rdf, <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> **mname_rdf)
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 <a class="code" href="structldns__struct__rr.html" title="Resource Record.">ldns_rr</a> *soa_rr, *rr;
<a name="l00134"></a>00134 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *soa_zone = NULL, *soa_mname = NULL;
<a name="l00135"></a>00135 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> *ipaddr, *fqdn_rdf, *tmp;
<a name="l00136"></a>00136 <a class="code" href="structldns__struct__rdf.html" title="Resource record data field.">ldns_rdf</a> **nslist;
<a name="l00137"></a>00137 <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *query, *resp;
<a name="l00138"></a>00138 <span class="keywordtype">size_t</span> i;
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="comment">/* </span>
<a name="l00141"></a>00141 <span class="comment"> * XXX Ok, this cannot be the best way to find this...?</span>
<a name="l00142"></a>00142 <span class="comment"> * XXX (I run into weird cache-related stuff here)</span>
<a name="l00143"></a>00143 <span class="comment"> */</span>
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="comment">/* Step 1 - first find a nameserver that should know *something* */</span>
<a name="l00146"></a>00146 fqdn_rdf = <a class="code" href="dname_8c.html#af4963d4ae086b1d77a58c6f757a00462" title="creates a new dname rdf from a string.">ldns_dname_new_frm_str</a>(fqdn);
<a name="l00147"></a>00147 query = <a class="code" href="packet_8c.html#af7eee9c15b0f645d5b5855ef15c4596c" title="creates a packet with a query in it for the given name, type and class.">ldns_pkt_query_new</a>(fqdn_rdf, <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa367b06e16e9a68d994130aedec1c3bdb" title="marks the start of a zone of authority">LDNS_RR_TYPE_SOA</a>, c, <a class="code" href="packet_8h.html#adbf4098a01ab543ebbcbd329103cc8d9">LDNS_RD</a>);
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (!query) {
<a name="l00149"></a>00149 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151 fqdn_rdf = NULL;
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <a class="code" href="packet_8c.html#a34c00d474f6d869ff40829e20c95e35a" title="Set the packet's id to a random value.">ldns_pkt_set_random_id</a>(query);
<a name="l00154"></a>00154 <span class="keywordflow">if</span> (<a class="code" href="resolver_8c.html#af90dc5b176e210bc66d9346875a1c8e8" title="Send the given packet to a nameserver.">ldns_resolver_send_pkt</a>(&resp, r, query) != <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>) {
<a name="l00155"></a>00155 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00156"></a>00156 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00159"></a>00159 <span class="keywordflow">if</span> (!resp) {
<a name="l00160"></a>00160 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="comment">/* XXX Is it safe to only look in authority section here? */</span>
<a name="l00164"></a>00164 <span class="keywordflow">while</span> ((soa_rr = <a class="code" href="rr_8c.html#a09395bafcd69ac1267639c3fa81e8b0f" title="pops the last rr from an rrlist.">ldns_rr_list_pop_rr</a>(<a class="code" href="packet_8c.html#a7edc2a338e1adfce9ef3ae137e6aa5d6" title="Return the packet's authority section.">ldns_pkt_authority</a>(resp)))) {
<a name="l00165"></a>00165 <span class="keywordflow">if</span> (<a class="code" href="rr_8c.html#a849c616b8e8d87b8c047a8b41be21228" title="returns the type of the rr.">ldns_rr_get_type</a>(soa_rr) != <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa367b06e16e9a68d994130aedec1c3bdb" title="marks the start of a zone of authority">LDNS_RR_TYPE_SOA</a>
<a name="l00166"></a>00166 || <a class="code" href="rr_8c.html#aed836e7b90f7c11993d92a4569d7e29b" title="returns the rdata field member counter.">ldns_rr_rdf</a>(soa_rr, 0) == NULL)
<a name="l00167"></a>00167 <span class="keywordflow">continue</span>;
<a name="l00168"></a>00168 <span class="comment">/* [RFC1035 3.3.13] */</span>
<a name="l00169"></a>00169 soa_mname = <a class="code" href="rdata_8c.html#af9a39f2f8b749efa6a20ba91cb696961" title="clones a rdf structure.">ldns_rdf_clone</a>(<a class="code" href="rr_8c.html#aed836e7b90f7c11993d92a4569d7e29b" title="returns the rdata field member counter.">ldns_rr_rdf</a>(soa_rr, 0));
<a name="l00170"></a>00170 <span class="keywordflow">break</span>;
<a name="l00171"></a>00171 }
<a name="l00172"></a>00172 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(resp);
<a name="l00173"></a>00173 <span class="keywordflow">if</span> (!soa_rr) {
<a name="l00174"></a>00174 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="comment">/* Step 2 - find SOA MNAME IP address, add to resolver */</span>
<a name="l00178"></a>00178 query = <a class="code" href="packet_8c.html#af7eee9c15b0f645d5b5855ef15c4596c" title="creates a packet with a query in it for the given name, type and class.">ldns_pkt_query_new</a>(soa_mname, <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa1c46026dd2245d1e8b8dd17f972f34c2" title="a host address">LDNS_RR_TYPE_A</a>, c, <a class="code" href="packet_8h.html#adbf4098a01ab543ebbcbd329103cc8d9">LDNS_RD</a>);
<a name="l00179"></a>00179 <span class="keywordflow">if</span> (!query) {
<a name="l00180"></a>00180 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182 soa_mname = NULL;
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <a class="code" href="packet_8c.html#a34c00d474f6d869ff40829e20c95e35a" title="Set the packet's id to a random value.">ldns_pkt_set_random_id</a>(query);
<a name="l00185"></a>00185 <span class="keywordflow">if</span> (<a class="code" href="resolver_8c.html#af90dc5b176e210bc66d9346875a1c8e8" title="Send the given packet to a nameserver.">ldns_resolver_send_pkt</a>(&resp, r, query) != <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>) {
<a name="l00186"></a>00186 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00187"></a>00187 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00190"></a>00190 <span class="keywordflow">if</span> (!resp) {
<a name="l00191"></a>00191 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00192"></a>00192 }
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (<a class="code" href="packet_8c.html#a801e0c9c3766dde74347793984ecd417" title="Return the packet's an count.">ldns_pkt_ancount</a>(resp) == 0) {
<a name="l00195"></a>00195 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(resp);
<a name="l00196"></a>00196 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00197"></a>00197 }
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="comment">/* XXX There may be more than one answer RR here. */</span>
<a name="l00200"></a>00200 rr = <a class="code" href="rr_8c.html#a09395bafcd69ac1267639c3fa81e8b0f" title="pops the last rr from an rrlist.">ldns_rr_list_pop_rr</a>(<a class="code" href="packet_8c.html#abe3507def1f75f9a369334f75a4b4799" title="Return the packet's answer section.">ldns_pkt_answer</a>(resp));
<a name="l00201"></a>00201 ipaddr = <a class="code" href="rr_8c.html#aed836e7b90f7c11993d92a4569d7e29b" title="returns the rdata field member counter.">ldns_rr_rdf</a>(rr, 0);
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="comment">/* Put the SOA mname IP first in the nameserver list. */</span>
<a name="l00204"></a>00204 nslist = <a class="code" href="resolver_8c.html#ac8068f8b2fa8621abb1557c3b4d95688" title="Return the configured nameserver ip address.">ldns_resolver_nameservers</a>(r);
<a name="l00205"></a>00205 <span class="keywordflow">for</span> (i = 0; i < <a class="code" href="resolver_8c.html#a64e6087bcfc88459e34da80077bad7eb" title="How many nameserver are configured in the resolver.">ldns_resolver_nameserver_count</a>(r); i++) {
<a name="l00206"></a>00206 <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>(ipaddr, nslist[i]) == 0) {
<a name="l00207"></a>00207 <span class="keywordflow">if</span> (i) {
<a name="l00208"></a>00208 tmp = nslist[0];
<a name="l00209"></a>00209 nslist[0] = nslist[i];
<a name="l00210"></a>00210 nslist[i] = tmp;
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212 <span class="keywordflow">break</span>;
<a name="l00213"></a>00213 }
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215 <span class="keywordflow">if</span> (i >= <a class="code" href="resolver_8c.html#a64e6087bcfc88459e34da80077bad7eb" title="How many nameserver are configured in the resolver.">ldns_resolver_nameserver_count</a>(r)) {
<a name="l00216"></a>00216 <span class="comment">/* SOA mname was not part of the resolver so add it first. */</span>
<a name="l00217"></a>00217 (void) <a class="code" href="resolver_8c.html#acbb25f585b7aa346d5be99dd19c7739b" title="Push a new nameserver to the resolver.">ldns_resolver_push_nameserver</a>(r, ipaddr);
<a name="l00218"></a>00218 nslist = <a class="code" href="resolver_8c.html#ac8068f8b2fa8621abb1557c3b4d95688" title="Return the configured nameserver ip address.">ldns_resolver_nameservers</a>(r);
<a name="l00219"></a>00219 i = <a class="code" href="resolver_8c.html#a64e6087bcfc88459e34da80077bad7eb" title="How many nameserver are configured in the resolver.">ldns_resolver_nameserver_count</a>(r) - 1;
<a name="l00220"></a>00220 tmp = nslist[0];
<a name="l00221"></a>00221 nslist[0] = nslist[i];
<a name="l00222"></a>00222 nslist[i] = tmp;
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(resp);
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <span class="comment">/* Make sure to ask the first in the list, i.e SOA mname */</span>
<a name="l00227"></a>00227 <a class="code" href="resolver_8c.html#a03f1f0f1ee720eb90632521854f7f254" title="Should the nameserver list be randomized before each use.">ldns_resolver_set_random</a>(r, <span class="keyword">false</span>);
<a name="l00228"></a>00228
<a name="l00229"></a>00229 <span class="comment">/* Step 3 - Redo SOA query, sending to SOA MNAME directly. */</span>
<a name="l00230"></a>00230 fqdn_rdf = <a class="code" href="dname_8c.html#af4963d4ae086b1d77a58c6f757a00462" title="creates a new dname rdf from a string.">ldns_dname_new_frm_str</a>(fqdn);
<a name="l00231"></a>00231 query = <a class="code" href="packet_8c.html#af7eee9c15b0f645d5b5855ef15c4596c" title="creates a packet with a query in it for the given name, type and class.">ldns_pkt_query_new</a>(fqdn_rdf, <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa367b06e16e9a68d994130aedec1c3bdb" title="marks the start of a zone of authority">LDNS_RR_TYPE_SOA</a>, c, <a class="code" href="packet_8h.html#adbf4098a01ab543ebbcbd329103cc8d9">LDNS_RD</a>);
<a name="l00232"></a>00232 <span class="keywordflow">if</span> (!query) {
<a name="l00233"></a>00233 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00234"></a>00234 }
<a name="l00235"></a>00235 fqdn_rdf = NULL;
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <a class="code" href="packet_8c.html#a34c00d474f6d869ff40829e20c95e35a" title="Set the packet's id to a random value.">ldns_pkt_set_random_id</a>(query);
<a name="l00238"></a>00238 <span class="keywordflow">if</span> (<a class="code" href="resolver_8c.html#af90dc5b176e210bc66d9346875a1c8e8" title="Send the given packet to a nameserver.">ldns_resolver_send_pkt</a>(&resp, r, query) != <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>) {
<a name="l00239"></a>00239 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00240"></a>00240 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(query);
<a name="l00243"></a>00243 <span class="keywordflow">if</span> (!resp) {
<a name="l00244"></a>00244 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00245"></a>00245 }
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="comment">/* XXX Is it safe to only look in authority section here, too? */</span>
<a name="l00248"></a>00248 <span class="keywordflow">while</span> ((soa_rr = <a class="code" href="rr_8c.html#a09395bafcd69ac1267639c3fa81e8b0f" title="pops the last rr from an rrlist.">ldns_rr_list_pop_rr</a>(<a class="code" href="packet_8c.html#a7edc2a338e1adfce9ef3ae137e6aa5d6" title="Return the packet's authority section.">ldns_pkt_authority</a>(resp)))) {
<a name="l00249"></a>00249 <span class="keywordflow">if</span> (<a class="code" href="rr_8c.html#a849c616b8e8d87b8c047a8b41be21228" title="returns the type of the rr.">ldns_rr_get_type</a>(soa_rr) != <a class="code" href="rr_8h.html#a640100112b0009efe3d61bbf799b33daa367b06e16e9a68d994130aedec1c3bdb" title="marks the start of a zone of authority">LDNS_RR_TYPE_SOA</a>
<a name="l00250"></a>00250 || <a class="code" href="rr_8c.html#aed836e7b90f7c11993d92a4569d7e29b" title="returns the rdata field member counter.">ldns_rr_rdf</a>(soa_rr, 0) == NULL)
<a name="l00251"></a>00251 <span class="keywordflow">continue</span>;
<a name="l00252"></a>00252 <span class="comment">/* [RFC1035 3.3.13] */</span>
<a name="l00253"></a>00253 soa_mname = <a class="code" href="rdata_8c.html#af9a39f2f8b749efa6a20ba91cb696961" title="clones a rdf structure.">ldns_rdf_clone</a>(<a class="code" href="rr_8c.html#aed836e7b90f7c11993d92a4569d7e29b" title="returns the rdata field member counter.">ldns_rr_rdf</a>(soa_rr, 0));
<a name="l00254"></a>00254 soa_zone = <a class="code" href="rdata_8c.html#af9a39f2f8b749efa6a20ba91cb696961" title="clones a rdf structure.">ldns_rdf_clone</a>(<a class="code" href="rr_8c.html#a1d254bd0deb5d18e34d84ebc10496c5d" title="returns the owner name of an rr structure.">ldns_rr_owner</a>(soa_rr));
<a name="l00255"></a>00255 <span class="keywordflow">break</span>;
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257 <a class="code" href="packet_8c.html#a05bd6d99b1f608238c67b84449724c16" title="frees the packet structure and all data that it contains.">ldns_pkt_free</a>(resp);
<a name="l00258"></a>00258 <span class="keywordflow">if</span> (!soa_rr) {
<a name="l00259"></a>00259 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa804a996d5f13cda0806bf1d54114d2ca">LDNS_STATUS_ERR</a>;
<a name="l00260"></a>00260 }
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="comment">/* That seems to have worked, pass results to caller. */</span>
<a name="l00263"></a>00263 *zone_rdf = soa_zone;
<a name="l00264"></a>00264 *mname_rdf = soa_mname;
<a name="l00265"></a>00265 <span class="keywordflow">return</span> <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>;
<a name="l00266"></a>00266 }
<a name="l00267"></a>00267
<a name="l00268"></a>00268 <span class="comment">/*</span>
<a name="l00269"></a>00269 <span class="comment"> * ldns_update_{get,set}_{zo,pr,up,ad}count</span>
<a name="l00270"></a>00270 <span class="comment"> */</span>
<a name="l00271"></a>00271
<a name="l00272"></a>00272 uint16_t
<a name="l00273"></a><a class="code" href="update_8h.html#a3e4fcb81854f80acffa8308ae548c872">00273</a> <a class="code" href="update_8c.html#a3e4fcb81854f80acffa8308ae548c872" title="Get the zo count.">ldns_update_zocount</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p)
<a name="l00274"></a>00274 {
<a name="l00275"></a>00275 <span class="keywordflow">return</span> <a class="code" href="packet_8c.html#acfd9095572aa59123edcdeb598976b69" title="Return the packet's qd count.">ldns_pkt_qdcount</a>(p);
<a name="l00276"></a>00276 }
<a name="l00277"></a>00277
<a name="l00278"></a>00278 uint16_t
<a name="l00279"></a><a class="code" href="update_8h.html#a8e959cc948589a5c1f634ca147e00678">00279</a> <a class="code" href="update_8c.html#a8e959cc948589a5c1f634ca147e00678" title="Get the zo count.">ldns_update_prcount</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p)
<a name="l00280"></a>00280 {
<a name="l00281"></a>00281 <span class="keywordflow">return</span> <a class="code" href="packet_8c.html#a801e0c9c3766dde74347793984ecd417" title="Return the packet's an count.">ldns_pkt_ancount</a>(p);
<a name="l00282"></a>00282 }
<a name="l00283"></a>00283
<a name="l00284"></a>00284 uint16_t
<a name="l00285"></a><a class="code" href="update_8h.html#a3606fdcd8e6d347b7e49bbcbb5dd89a8">00285</a> <a class="code" href="update_8c.html#a3606fdcd8e6d347b7e49bbcbb5dd89a8" title="Get the zo count.">ldns_update_upcount</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p)
<a name="l00286"></a>00286 {
<a name="l00287"></a>00287 <span class="keywordflow">return</span> <a class="code" href="packet_8c.html#ac551c3cfc6a48241e1d4cd4d1390df1c" title="Return the packet's ns count.">ldns_pkt_nscount</a>(p);
<a name="l00288"></a>00288 }
<a name="l00289"></a>00289
<a name="l00290"></a>00290 uint16_t
<a name="l00291"></a><a class="code" href="update_8h.html#a197ee3659069b4d475a7759ead17713c">00291</a> <a class="code" href="update_8c.html#a197ee3659069b4d475a7759ead17713c" title="Get the zo count.">ldns_update_ad</a>(<span class="keyword">const</span> <a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p)
<a name="l00292"></a>00292 {
<a name="l00293"></a>00293 <span class="keywordflow">return</span> <a class="code" href="packet_8c.html#a45ad46caf5027284947fe58b77b2a93a" title="Return the packet's ar count.">ldns_pkt_arcount</a>(p);
<a name="l00294"></a>00294 }
<a name="l00295"></a>00295
<a name="l00296"></a>00296 <span class="keywordtype">void</span>
<a name="l00297"></a><a class="code" href="update_8h.html#a2f896032db7f75056a966fa5eee30901">00297</a> <a class="code" href="update_8c.html#a278f94c0f11cce1ab0512506608a6b95" title="Set the zo count.">ldns_update_set_zo</a>(<a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p, uint16_t v)
<a name="l00298"></a>00298 {
<a name="l00299"></a>00299 <a class="code" href="packet_8c.html#a8c1184a51ba2d82508169d5e9993b9a2" title="Set the packet's qd count.">ldns_pkt_set_qdcount</a>(p, v);
<a name="l00300"></a>00300 }
<a name="l00301"></a>00301
<a name="l00302"></a>00302 <span class="keywordtype">void</span>
<a name="l00303"></a><a class="code" href="update_8h.html#a43768ee933d9d77e69bd082c18888fff">00303</a> <a class="code" href="update_8c.html#ace7ad313fbfac9de2575b79fb65a277e" title="Set the pr count.">ldns_update_set_prcount</a>(<a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p, uint16_t v)
<a name="l00304"></a>00304 {
<a name="l00305"></a>00305 <a class="code" href="packet_8c.html#a102126f65a7311eae3be1c659b4e008b" title="Set the packet's an count.">ldns_pkt_set_ancount</a>(p, v);
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="keywordtype">void</span>
<a name="l00309"></a><a class="code" href="update_8h.html#a861a5962975e96d09678a03dc814efd3">00309</a> <a class="code" href="update_8c.html#ad8a4b2d66aac5936a25f194e81e40cc6" title="Set the up count.">ldns_update_set_upcount</a>(<a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p, uint16_t v)
<a name="l00310"></a>00310 {
<a name="l00311"></a>00311 <a class="code" href="packet_8c.html#a4bacb8d6c93f808aac967d99ad271631" title="Set the packet's ns count.">ldns_pkt_set_nscount</a>(p, v);
<a name="l00312"></a>00312 }
<a name="l00313"></a>00313
<a name="l00314"></a>00314 <span class="keywordtype">void</span>
<a name="l00315"></a><a class="code" href="update_8h.html#ab35e24776bdbad7bada095565f885f81">00315</a> <a class="code" href="update_8c.html#a2cf70a879aaf7734c3f4d4025b0a80ba" title="Set the ad count.">ldns_update_set_adcount</a>(<a class="code" href="structldns__struct__pkt.html" title="DNS packet.">ldns_pkt</a> *p, uint16_t v)
<a name="l00316"></a>00316 {
<a name="l00317"></a>00317 <a class="code" href="packet_8c.html#af3c11171cf7981f75f68ac1e02b0fed3" title="Set the packet's arcount.">ldns_pkt_set_arcount</a>(p, v);
<a name="l00318"></a>00318 }
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