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<h1>iter_hints.c File Reference</h1>This file contains functions to assist the iterator module.
<a href="#_details">More...</a>
<p>
<code>#include "config.h"</code><br>
<code>#include "<a class="el" href="iter__hints_8h.html">iterator/iter_hints.h</a>"</code><br>
<code>#include "<a class="el" href="iter__delegpt_8h.html">iterator/iter_delegpt.h</a>"</code><br>
<code>#include "<a class="el" href="regional_8h.html">util/regional.h</a>"</code><br>
<code>#include "<a class="el" href="log_8h.html">util/log.h</a>"</code><br>
<code>#include "<a class="el" href="config__file_8h.html">util/config_file.h</a>"</code><br>
<code>#include "<a class="el" href="net__help_8h.html">util/net_help.h</a>"</code><br>
<code>#include "<a class="el" href="dname_8h.html">util/data/dname.h</a>"</code><br>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct <a class="el" href="structiter__hints.html">iter_hints</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#f248b52e873bcaca7db8f1b0ffa3c45a">hints_create</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create hints. <a href="#f248b52e873bcaca7db8f1b0ffa3c45a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#cea0641625f87810b84d5153afda9dae">hints_delete</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Delete hints. <a href="#cea0641625f87810b84d5153afda9dae"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="2ff897c709ac6cf4ba771d34d668e125"></a><!-- doxytag: member="iter_hints.c::ah" ref="2ff897c709ac6cf4ba771d34d668e125" args="(struct delegpt *dp, struct regional *r, const char *sv, const char *ip)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#2ff897c709ac6cf4ba771d34d668e125">ah</a> (struct <a class="el" href="structdelegpt.html">delegpt</a> *dp, struct <a class="el" href="structregional.html">regional</a> *r, const char *sv, const char *ip)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">add hint to delegation hints <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="5a697dce3e1ed7f501c662731825674f"></a><!-- doxytag: member="iter_hints.c::compile_time_root_prime" ref="5a697dce3e1ed7f501c662731825674f" args="(struct regional *r, int do_ip4, int do_ip6)" -->
static struct <a class="el" href="structdelegpt.html">delegpt</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#5a697dce3e1ed7f501c662731825674f">compile_time_root_prime</a> (struct <a class="el" href="structregional.html">regional</a> *r, int do_ip4, int do_ip6)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">obtain compiletime provided root hints <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="54f0e754a31f7c5f6d4cf3c0954d2d67"></a><!-- doxytag: member="iter_hints.c::hints_insert" ref="54f0e754a31f7c5f6d4cf3c0954d2d67" args="(struct iter_hints *hints, uint16_t c, struct delegpt *dp, int noprime)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#54f0e754a31f7c5f6d4cf3c0954d2d67">hints_insert</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, uint16_t c, struct <a class="el" href="structdelegpt.html">delegpt</a> *dp, int noprime)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">insert new hint info into hint structure <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f247b9074ece96ac61675e615f5d6cad"></a><!-- doxytag: member="iter_hints.c::read_stubs_name" ref="f247b9074ece96ac61675e615f5d6cad" args="(struct iter_hints *hints, struct config_stub *s, struct delegpt *dp)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#f247b9074ece96ac61675e615f5d6cad">read_stubs_name</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, struct <a class="el" href="structconfig__stub.html">config_stub</a> *s, struct <a class="el" href="structdelegpt.html">delegpt</a> *dp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">set stub name <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="95564b329f87e18078aac6aac082e0f1"></a><!-- doxytag: member="iter_hints.c::read_stubs_host" ref="95564b329f87e18078aac6aac082e0f1" args="(struct iter_hints *hints, struct config_stub *s, struct delegpt *dp)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#95564b329f87e18078aac6aac082e0f1">read_stubs_host</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, struct <a class="el" href="structconfig__stub.html">config_stub</a> *s, struct <a class="el" href="structdelegpt.html">delegpt</a> *dp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">set stub host names <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9380396b0ba32e8becc56c7475a4b7c5"></a><!-- doxytag: member="iter_hints.c::read_stubs_addr" ref="9380396b0ba32e8becc56c7475a4b7c5" args="(struct iter_hints *hints, struct config_stub *s, struct delegpt *dp)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#9380396b0ba32e8becc56c7475a4b7c5">read_stubs_addr</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, struct <a class="el" href="structconfig__stub.html">config_stub</a> *s, struct <a class="el" href="structdelegpt.html">delegpt</a> *dp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">set stub server addresses <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="88600fd409dee0080acc3c6f87f06790"></a><!-- doxytag: member="iter_hints.c::read_stubs" ref="88600fd409dee0080acc3c6f87f06790" args="(struct iter_hints *hints, struct config_file *cfg)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#88600fd409dee0080acc3c6f87f06790">read_stubs</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, struct <a class="el" href="structconfig__file.html">config_file</a> *cfg)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">read stubs config <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="90efb5c371483ca5577a3c7f53f348fa"></a><!-- doxytag: member="iter_hints.c::read_root_hints" ref="90efb5c371483ca5577a3c7f53f348fa" args="(struct iter_hints *hints, char *fname)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#90efb5c371483ca5577a3c7f53f348fa">read_root_hints</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, char *fname)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">read root hints from file <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7defa4acce8dcb1b01ead59b9582fc02"></a><!-- doxytag: member="iter_hints.c::read_root_hints_list" ref="7defa4acce8dcb1b01ead59b9582fc02" args="(struct iter_hints *hints, struct config_file *cfg)" -->
static int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#7defa4acce8dcb1b01ead59b9582fc02">read_root_hints_list</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, struct <a class="el" href="structconfig__file.html">config_file</a> *cfg)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">read root hints list <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#3b88d456a96bcc26daddb362ab0f2984">hints_apply_cfg</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, struct <a class="el" href="structconfig__file.html">config_file</a> *cfg)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Process hints config. <a href="#3b88d456a96bcc26daddb362ab0f2984"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct <a class="el" href="structdelegpt.html">delegpt</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#b30fe2491008f02f382dc809b6260571">hints_lookup_root</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, uint16_t qclass)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Find root hints for the given class. <a href="#b30fe2491008f02f382dc809b6260571"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct <a class="el" href="structiter__hints__stub.html">iter_hints_stub</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#b571b2d931535603087bb45c5079d8d4">hints_lookup_stub</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints, uint8_t *qname, uint16_t qclass, struct <a class="el" href="structdelegpt.html">delegpt</a> *cache_dp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Given a qname/qclass combination, and the delegation point from the cache for this qname/qclass, determine if this combination indicates that a stub hint exists and must be primed. <a href="#b571b2d931535603087bb45c5079d8d4"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="iter__hints_8c.html#a19a7928f7331de6964a07e53206f020">hints_get_mem</a> (struct <a class="el" href="structiter__hints.html">iter_hints</a> *hints)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get memory in use by hints. <a href="#a19a7928f7331de6964a07e53206f020"></a><br></td></tr>
</table>
<hr><h2>Detailed Description</h2>
This file contains functions to assist the iterator module.
<p>
Keep track of stub and root hints, and read those from config. <hr><h2>Function Documentation</h2>
<a class="anchor" name="f248b52e873bcaca7db8f1b0ffa3c45a"></a><!-- doxytag: member="iter_hints.c::hints_create" ref="f248b52e873bcaca7db8f1b0ffa3c45a" args="()" -->
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<td class="memname">struct <a class="el" href="structiter__hints.html">iter_hints</a>* hints_create </td>
<td>(</td>
<td class="paramname"> </td>
<td> ) </td>
<td><code> [read]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Create hints.
<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>new hints or NULL on error. </dd></dl>
<p>References <a class="el" href="iter__hints_8c_source.html#l00067">hints_delete()</a>, <a class="el" href="iter__hints_8h_source.html#l00056">iter_hints::region</a>, and <a class="el" href="regional_8c_source.html#l00061">regional_create()</a>.</p>
<p>Referenced by <a class="el" href="iter__utils_8c_source.html#l00099">iter_apply_cfg()</a>.</p>
</div>
</div><p>
<a class="anchor" name="cea0641625f87810b84d5153afda9dae"></a><!-- doxytag: member="iter_hints.c::hints_delete" ref="cea0641625f87810b84d5153afda9dae" args="(struct iter_hints *hints)" -->
<div class="memitem">
<div class="memproto">
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<td class="memname">void hints_delete </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structiter__hints.html">iter_hints</a> * </td>
<td class="paramname"> <em>hints</em> </td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Delete hints.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>hints,:</em> </td><td>to delete. </td></tr>
</table>
</dl>
<p>References <a class="el" href="iter__hints_8h_source.html#l00056">iter_hints::region</a>, and <a class="el" href="regional_8c_source.html#l00108">regional_destroy()</a>.</p>
<p>Referenced by <a class="el" href="iter__hints_8c_source.html#l00052">hints_create()</a>, and <a class="el" href="iterator_8c_source.html#l00083">iter_deinit()</a>.</p>
</div>
</div><p>
<a class="anchor" name="3b88d456a96bcc26daddb362ab0f2984"></a><!-- doxytag: member="iter_hints.c::hints_apply_cfg" ref="3b88d456a96bcc26daddb362ab0f2984" args="(struct iter_hints *hints, struct config_file *cfg)" -->
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<td class="memname">int hints_apply_cfg </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structiter__hints.html">iter_hints</a> * </td>
<td class="paramname"> <em>hints</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct <a class="el" href="structconfig__file.html">config_file</a> * </td>
<td class="paramname"> <em>cfg</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Process hints config.
<p>
Sets default values for root hints if no config. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>hints,:</em> </td><td>where to store. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>cfg,:</em> </td><td>config options. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on error. </dd></dl>
<p>References <a class="el" href="iter__hints_8c_source.html#l00099">compile_time_root_prime()</a>, <a class="el" href="config__file_8h_source.html#l00069">config_file::do_ip4</a>, <a class="el" href="config__file_8h_source.html#l00071">config_file::do_ip6</a>, <a class="el" href="iter__hints_8c_source.html#l00144">hints_insert()</a>, <a class="el" href="iter__hints_8c_source.html#l00423">hints_lookup_root()</a>, <a class="el" href="dnstree_8c_source.html#l00074">name_tree_init()</a>, <a class="el" href="dnstree_8c_source.html#l00133">name_tree_init_parents()</a>, <a class="el" href="iter__hints_8c_source.html#l00375">read_root_hints_list()</a>, <a class="el" href="iter__hints_8c_source.html#l00238">read_stubs()</a>, <a class="el" href="iter__hints_8h_source.html#l00056">iter_hints::region</a>, <a class="el" href="regional_8c_source.html#l00090">regional_free_all()</a>, <a class="el" href="iter__hints_8h_source.html#l00065">iter_hints::tree</a>, <a class="el" href="log_8h_source.html#l00058">VERB_ALGO</a>, and <a class="el" href="ldns-testpkts_8c.html#a557e5b23b2833d7c1ec0415a1bdd2b1">verbose()</a>.</p>
<p>Referenced by <a class="el" href="iter__utils_8c_source.html#l00099">iter_apply_cfg()</a>.</p>
</div>
</div><p>
<a class="anchor" name="b30fe2491008f02f382dc809b6260571"></a><!-- doxytag: member="iter_hints.c::hints_lookup_root" ref="b30fe2491008f02f382dc809b6260571" args="(struct iter_hints *hints, uint16_t qclass)" -->
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<td class="memname">struct <a class="el" href="structdelegpt.html">delegpt</a>* hints_lookup_root </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structiter__hints.html">iter_hints</a> * </td>
<td class="paramname"> <em>hints</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t </td>
<td class="paramname"> <em>qclass</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [read]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Find root hints for the given class.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>hints,:</em> </td><td>hint storage. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>qclass,:</em> </td><td>class for which root hints are requested. host order. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>: NULL if no hints, or a ptr to stored hints. </dd></dl>
<p>References <a class="el" href="iter__hints_8h_source.html#l00075">iter_hints_stub::dp</a>, <a class="el" href="dnstree_8c_source.html#l00159">name_tree_find()</a>, and <a class="el" href="iter__hints_8h_source.html#l00065">iter_hints::tree</a>.</p>
<p>Referenced by <a class="el" href="iter__hints_8c_source.html#l00394">hints_apply_cfg()</a>, <a class="el" href="iterator_8c_source.html#l00541">prime_root()</a>, and <a class="el" href="iterator_8c_source.html#l00827">processInitRequest()</a>.</p>
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</div><p>
<a class="anchor" name="b571b2d931535603087bb45c5079d8d4"></a><!-- doxytag: member="iter_hints.c::hints_lookup_stub" ref="b571b2d931535603087bb45c5079d8d4" args="(struct iter_hints *hints, uint8_t *qname, uint16_t qclass, struct delegpt *cache_dp)" -->
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<td class="memname">struct <a class="el" href="structiter__hints__stub.html">iter_hints_stub</a>* hints_lookup_stub </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structiter__hints.html">iter_hints</a> * </td>
<td class="paramname"> <em>hints</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint8_t * </td>
<td class="paramname"> <em>qname</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t </td>
<td class="paramname"> <em>qclass</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct <a class="el" href="structdelegpt.html">delegpt</a> * </td>
<td class="paramname"> <em>dp</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [read]</code></td>
</tr>
</table>
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<div class="memdoc">
<p>
Given a qname/qclass combination, and the delegation point from the cache for this qname/qclass, determine if this combination indicates that a stub hint exists and must be primed.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>hints,:</em> </td><td>hint storage. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>qname,:</em> </td><td>The qname that generated the delegation point. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>qclass,:</em> </td><td>The qclass that generated the delegation point. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dp,:</em> </td><td>The cache generated delegation point. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>: A priming delegation point if there is a stub hint that must be primed, otherwise null. </dd></dl>
<p>References <a class="el" href="dname_8c_source.html#l00384">dname_count_size_labels()</a>, <a class="el" href="dname_8c_source.html#l00566">dname_strict_subdomain()</a>, <a class="el" href="iter__hints_8h_source.html#l00075">iter_hints_stub::dp</a>, <a class="el" href="iter__delegpt_8h_source.html#l00059">delegpt::name</a>, <a class="el" href="dnstree_8c_source.html#l00171">name_tree_lookup()</a>, <a class="el" href="iter__delegpt_8h_source.html#l00063">delegpt::namelabs</a>, <a class="el" href="iter__hints_8h_source.html#l00077">iter_hints_stub::noprime</a>, <a class="el" href="dname_8c_source.html#l00096">query_dname_compare()</a>, and <a class="el" href="iter__hints_8h_source.html#l00065">iter_hints::tree</a>.</p>
<p>Referenced by <a class="el" href="iterator_8c_source.html#l00600">prime_stub()</a>.</p>
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<a class="anchor" name="a19a7928f7331de6964a07e53206f020"></a><!-- doxytag: member="iter_hints.c::hints_get_mem" ref="a19a7928f7331de6964a07e53206f020" args="(struct iter_hints *hints)" -->
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<td class="memname">size_t hints_get_mem </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structiter__hints.html">iter_hints</a> * </td>
<td class="paramname"> <em>hints</em> </td>
<td> ) </td>
<td></td>
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<p>
Get memory in use by hints.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>hints,:</em> </td><td>hint storage. </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>bytes in use </dd></dl>
<p>References <a class="el" href="iter__hints_8h_source.html#l00056">iter_hints::region</a>, and <a class="el" href="regional_8c_source.html#l00214">regional_get_mem()</a>.</p>
<p>Referenced by <a class="el" href="iterator_8c_source.html#l02165">iter_get_mem()</a>.</p>
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</div><p>
</div>
<hr size="1"><address style="text-align: right;"><small>Generated on Tue Oct 13 06:46:30 2009 for unbound by
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