--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-69B46D92-8D07-5B42-B603-3F725977AA4A.dita	Wed Mar 31 11:11:55 2010 +0100
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-69B46D92-8D07-5B42-B603-3F725977AA4A" xml:lang="en"><title>DHCP</title><shortdesc>The Dynamic Host Configuration Protocol (DHCP) is an Internet standard
+defined in RFC2131 (IPv4) and RFC3315 (IPv6). </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>The DHCP client implementation in Symbian platform enables the client applications
+to configure a network connection with a DHCP server. </p>
+<p>For more details on the DHCP standards, see RFC2131<xref href="http://www.ietf.org/rfc/rfc2131.txt" scope="external">RFC2131</xref> for IPv4, and RFC3315<xref href="http://www.ietf.org/rfc/rfc3315.txt" scope="external">RFC3315</xref> for IPv6.</p>
+<p>This document explains the following concepts: </p>
+<ul>
+<li id="GUID-77B3171B-FCF4-5744-B288-AFCC81B93488"><p>DHCP States </p> </li>
+<li id="GUID-460F04A8-5FF1-578F-B129-3C61264044D4"><p>DHCP Options </p> </li>
+</ul>
+<section id="GUID-D83FB908-53EC-4019-A8E4-8B633FEC7F0B"><title>DHCP States </title> <p>The
+following are the states of the DHCP daemon in Symbian platform: </p> <ul>
+<li id="GUID-ACD085A9-E25C-58A8-859E-1E42BC467089"><p>DHCP Discover </p> </li>
+<li id="GUID-18AAC18A-9A29-5B5D-AEC1-E64B8A81A149"><p>Bind </p> </li>
+<li id="GUID-04DF8A2D-4CCD-59A3-8346-CF7D5E1F176C"><p>Renew lease </p> </li>
+<li id="GUID-56E8EDB9-EBF7-5A66-B85B-E0685BED0C6C"><p>Release lease </p> </li>
+</ul> <p><b>DHCP Discover </b> </p> <p>This stage gets the IP address from
+the server by the DHCP clients. The DHCP client sends a DISCOVER message to
+the DHCP server and waits for the responses from the various DHCP servers. </p> <p><b>Bind </b> </p> <p>The
+DHCP server acknowledges the BIND request with an IP address. The client selects
+one of the IP addresses and responds back with a BIND message. If the DHCP
+server acknowledges the BIND request, the client can use the IP address. If
+the server responds with a negative acknowledgement, the DHCP client begins
+the DHCP DISCOVER state. </p> <p><b>Renew lease </b> </p> <p>The DHCP server
+issues an IP address, called a lease, during the bind state. When the lease
+is about to expire the client requests the server to renew the lease. If the
+client is connected to the same network the lease gets renewed. If the client
+has moved to a domain with a different DHCP server the client requests a new
+IP address using DISCOVER message. </p> <p><b>Release lease </b> </p> <p>When
+the DHCP client does not require a connection it releases the lease, so that
+it can be configured to any other client requesting a connection. </p> </section>
+<section id="GUID-C5F11CA2-8880-4FDB-8065-149C5EAA7A44"><title>DHCP Options</title> <p>To
+obtain the network parameters from the DHCP server, the client uses the DHCP
+options. The Internet standard <xref href="http://www.ietf.org/rfc/rfc2132.txt" scope="external">RFC 2132</xref> specifies the various DHCP options. The client
+uses the <xref href="GUID-95F9FA1F-5AA5-3C2F-ADE0-34668B499C50.dita"><apiname>aOptionLevel</apiname></xref> and <xref href="GUID-DA7EBA40-EF88-3C95-9361-E3A199783CE2.dita"><apiname>aOptionName</apiname></xref> arguments
+while calling <xref href="GUID-BED8A733-2ED7-31AD-A911-C1F4707C67FD.dita#GUID-BED8A733-2ED7-31AD-A911-C1F4707C67FD/GUID-9F820CF9-1D4F-3452-983B-E0C694D6783A"><apiname>RConnection::Ioctl()</apiname></xref> function. </p> </section>
+</conbody><related-links>
+<link href="GUID-45E1953A-DEFB-5E48-AC96-443A3234F913.dita"><linktext>Retrieving
+an IP Network  Parameters</linktext></link>
+</related-links></concept>
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