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diff --git a/lib/lwres/man/lwres_packet.docbook b/lib/lwres/man/lwres_packet.docbook new file mode 100644 index 0000000..87841db --- /dev/null +++ b/lib/lwres/man/lwres_packet.docbook @@ -0,0 +1,291 @@ +<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" + [<!ENTITY mdash "—">]> +<!-- + - Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") + - Copyright (C) 2000, 2001 Internet Software Consortium. + - + - Permission to use, copy, modify, and/or distribute this software for any + - purpose with or without fee is hereby granted, provided that the above + - copyright notice and this permission notice appear in all copies. + - + - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + - PERFORMANCE OF THIS SOFTWARE. +--> + +<!-- $Id: lwres_packet.docbook,v 1.13 2007/06/18 23:47:51 tbox Exp $ --> +<refentry> + + <refentryinfo> + <date>Jun 30, 2000</date> + </refentryinfo> + + <refmeta> + <refentrytitle>lwres_packet</refentrytitle> + <manvolnum>3</manvolnum> + <refmiscinfo>BIND9</refmiscinfo> + </refmeta> + + <docinfo> + <copyright> + <year>2004</year> + <year>2005</year> + <year>2007</year> + <holder>Internet Systems Consortium, Inc. ("ISC")</holder> + </copyright> + <copyright> + <year>2000</year> + <year>2001</year> + <holder>Internet Software Consortium.</holder> + </copyright> + </docinfo> + + <refnamediv> + <refname>lwres_lwpacket_renderheader</refname> + <refname>lwres_lwpacket_parseheader</refname> + <refpurpose>lightweight resolver packet handling functions</refpurpose> + </refnamediv> + <refsynopsisdiv> + <funcsynopsis> +<funcsynopsisinfo>#include <lwres/lwpacket.h></funcsynopsisinfo> +<funcprototype> + <funcdef> +lwres_result_t +<function>lwres_lwpacket_renderheader</function></funcdef> + <paramdef>lwres_buffer_t *<parameter>b</parameter></paramdef> + <paramdef>lwres_lwpacket_t *<parameter>pkt</parameter></paramdef> + </funcprototype> +<funcprototype> + <funcdef> +lwres_result_t +<function>lwres_lwpacket_parseheader</function></funcdef> + <paramdef>lwres_buffer_t *<parameter>b</parameter></paramdef> + <paramdef>lwres_lwpacket_t *<parameter>pkt</parameter></paramdef> + </funcprototype> +</funcsynopsis> + </refsynopsisdiv> + <refsect1> + <title>DESCRIPTION</title> + <para> + These functions rely on a + <type>struct lwres_lwpacket</type> + which is defined in + <filename>lwres/lwpacket.h</filename>. + </para> + + <para><programlisting> +typedef struct lwres_lwpacket lwres_lwpacket_t; + </programlisting> + </para> + <para><programlisting> +struct lwres_lwpacket { + lwres_uint32_t length; + lwres_uint16_t version; + lwres_uint16_t pktflags; + lwres_uint32_t serial; + lwres_uint32_t opcode; + lwres_uint32_t result; + lwres_uint32_t recvlength; + lwres_uint16_t authtype; + lwres_uint16_t authlength; +}; +</programlisting> + </para> + + <para> + The elements of this structure are: + <variablelist> + <varlistentry> + <term><constant>length</constant></term> + <listitem> + <para> + the overall packet length, including the entire packet header. + This field is filled in by the lwres_gabn_*() and lwres_gnba_*() + calls. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>version</constant></term> + <listitem> + <para> + the header format. There is currently only one format, + <type>LWRES_LWPACKETVERSION_0</type>. + + This field is filled in by the lwres_gabn_*() and lwres_gnba_*() + calls. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>pktflags</constant></term> + <listitem> + <para> + library-defined flags for this packet: for instance whether the + packet + is a request or a reply. Flag values can be set, but not defined + by + the caller. + This field is filled in by the application wit the exception of + the + LWRES_LWPACKETFLAG_RESPONSE bit, which is set by the library in + the + lwres_gabn_*() and lwres_gnba_*() calls. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>serial</constant></term> + <listitem> + <para> + is set by the requestor and is returned in all replies. If two + or more + packets from the same source have the same serial number and are + from + the same source, they are assumed to be duplicates and the + latter ones + may be dropped. + This field must be set by the application. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>opcode</constant></term> + <listitem> + <para> + indicates the operation. + Opcodes between 0x00000000 and 0x03ffffff are + reserved for use by the lightweight resolver library. Opcodes + between + 0x04000000 and 0xffffffff are application defined. + This field is filled in by the lwres_gabn_*() and lwres_gnba_*() + calls. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>result</constant></term> + <listitem> + <para> + is only valid for replies. + Results between 0x04000000 and 0xffffffff are application + defined. + Results between 0x00000000 and 0x03ffffff are reserved for + library use. + This field is filled in by the lwres_gabn_*() and lwres_gnba_*() + calls. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>recvlength</constant></term> + <listitem> + <para> + is the maximum buffer size that the receiver can handle on + requests + and the size of the buffer needed to satisfy a request when the + buffer + is too large for replies. + This field is supplied by the application. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>authtype</constant></term> + <listitem> + <para> + defines the packet level authentication that is used. + Authorisation types between 0x1000 and 0xffff are application + defined + and types between 0x0000 and 0x0fff are reserved for library + use. + Currently these are not used and must be zero. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>authlen</constant></term> + <listitem> + <para> + gives the length of the authentication data. + Since packet authentication is currently not used, this must be + zero. + </para> + </listitem> + </varlistentry> + </variablelist> + </para> + <para> + The following opcodes are currently defined: + <variablelist> + <varlistentry> + <term><constant>NOOP</constant></term> + <listitem> + <para> + Success is always returned and the packet contents are echoed. + The lwres_noop_*() functions should be used for this type. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>GETADDRSBYNAME</constant></term> + <listitem> + <para> + returns all known addresses for a given name. + The lwres_gabn_*() functions should be used for this type. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><constant>GETNAMEBYADDR</constant></term> + <listitem> + <para> + return the hostname for the given address. + The lwres_gnba_*() functions should be used for this type. + </para> + </listitem> + </varlistentry> + </variablelist> + </para> + + <para><function>lwres_lwpacket_renderheader()</function> + transfers the contents of lightweight resolver packet structure + <type>lwres_lwpacket_t</type> <parameter>*pkt</parameter> in + network byte order to the lightweight resolver buffer, + <parameter>*b</parameter>. + </para> + + <para><function>lwres_lwpacket_parseheader()</function> + performs the converse operation. It transfers data in network + byte order from buffer <parameter>*b</parameter> to resolver + packet <parameter>*pkt</parameter>. The contents of the buffer + <parameter>b</parameter> should correspond to a + <type>lwres_lwpacket_t</type>. + </para> + + </refsect1> + + <refsect1> + <title>RETURN VALUES</title> + <para> + Successful calls to + <function>lwres_lwpacket_renderheader()</function> and + <function>lwres_lwpacket_parseheader()</function> return + <errorcode>LWRES_R_SUCCESS</errorcode>. If there is insufficient + space to copy data between the buffer <parameter>*b</parameter> and + lightweight resolver packet <parameter>*pkt</parameter> both + functions + return <errorcode>LWRES_R_UNEXPECTEDEND</errorcode>. + </para> + + </refsect1> +</refentry><!-- + - Local variables: + - mode: sgml + - End: +--> |