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<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- Converts from simple xml iptables format to iptables-save format
Copyright 2006 UfoMechanic
Author: azez@ufomechanic.net
This code is distributed and licensed under the terms of GNU GPL v2
This sample usage outputs roughly want goes in
iptables-save | iptables-xml -c | xsltproc iptables.xslt -
-->
<xsl:transform version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method = "text" />
<xsl:strip-space elements="*" />
<!-- output conditions of a rule but not an action -->
<xsl:template match="iptables-rules/table/chain/rule/conditions/*">
<!-- <match> is the psuedo module when a match module doesn't need to be loaded
and when -m does not need to be inserted -->
<xsl:if test="name() != 'match'">
<xsl:text> -m </xsl:text><xsl:value-of select="name()"/>
</xsl:if>
<xsl:apply-templates select="node()"/>
</xsl:template>
<!-- delete the actions or conditions containers, and process child nodes -->
<xsl:template match="iptables-rules/table/chain/rule/actions|table/chain/rule/conditions">
<xsl:apply-templates select="*"/>
</xsl:template>
<xsl:template match="iptables-rules/table/chain/rule/actions/goto">
<xsl:text> -g </xsl:text>
<xsl:apply-templates select="*"/>
<xsl:text>&#xA;</xsl:text>
</xsl:template>
<xsl:template match="iptables-rules/table/chain/rule/actions/call">
<xsl:text> -j </xsl:text>
<xsl:apply-templates select="*"/>
<xsl:text>&#xA;</xsl:text>
</xsl:template>
<!-- all other actions are module actions -->
<xsl:template match="iptables-rules/table/chain/rule/actions/*">
<xsl:text> -j </xsl:text><xsl:value-of select="name()"/>
<xsl:apply-templates select="*"/>
<xsl:text>&#xA;</xsl:text>
</xsl:template>
<!-- all child action nodes -->
<xsl:template match="iptables-rules/table/chain/rule/actions//*|iptables-rules/table/chain/rule/conditions//*" priority="0">
<xsl:if test="@invert=1"><xsl:text> !</xsl:text></xsl:if>
<xsl:text> -</xsl:text>
<!-- if length of name is 1 character, then only do 1 - not 2 -->
<xsl:if test="string-length(name())&gt;1">
<xsl:text>-</xsl:text>
</xsl:if>
<xsl:value-of select="name()"/>
<xsl:text> </xsl:text>
<xsl:apply-templates select="node()"/>
</xsl:template>
<xsl:template match="iptables-rules/table/chain/rule/actions/call/*|iptables-rules/table/chain/rule/actions/goto/*">
<xsl:value-of select="name()"/>
<!-- I bet there are no child nodes, should we risk it? -->
<xsl:apply-templates select="node()"/>
</xsl:template>
<!-- output the head of the rule, and any conditions -->
<xsl:template name="rule-head">
<xsl:if test="string-length(@packet-count)+string-length(@byte-count)">
<xsl:call-template name="counters"><xsl:with-param name="node" select="."/></xsl:call-template>
<xsl:text> </xsl:text>
</xsl:if>
<xsl:text>-A </xsl:text><!-- a rule must be under a chain -->
<xsl:value-of select="../@name" />
<xsl:apply-templates select="conditions"/>
</xsl:template>
<!-- Output a single rule, perhaps as multiple rules if we have more than one action -->
<xsl:template match="iptables-rules/table/chain/rule">
<xsl:choose>
<xsl:when test="count(actions/*)&gt;0">
<xsl:for-each select="actions/*">
<!-- and a for-each to re-select the rule as the current node, to write the rule-head -->
<xsl:for-each select="../..">
<xsl:call-template name="rule-head"/>
</xsl:for-each>
<!-- now write the this action -->
<xsl:apply-templates select="."/>
</xsl:for-each>
</xsl:when>
<xsl:otherwise>
<!-- no need to loop if there are no actions, just output conditions -->
<xsl:call-template name="rule-head"/>
<xsl:text>&#xA;</xsl:text>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template match="iptables-rules/table">
<xsl:text># Generated by iptables.xslt&#xA;</xsl:text>
<xsl:text>*</xsl:text><xsl:value-of select="@name"/><xsl:text>&#xA;</xsl:text>
<!-- Loop through each chain and output the chain header -->
<xsl:for-each select="chain">
<xsl:text>:</xsl:text>
<xsl:value-of select="@name"/>
<xsl:text> </xsl:text>
<xsl:choose>
<xsl:when test="not(string-length(@policy))"><xsl:text>-</xsl:text></xsl:when>
<xsl:otherwise><xsl:value-of select="@policy"/></xsl:otherwise>
</xsl:choose>
<xsl:text> </xsl:text>
<xsl:call-template name="counters"><xsl:with-param name="node" select="."/></xsl:call-template>
<xsl:text>&#xA;</xsl:text>
</xsl:for-each>
<!-- Loop through each chain and output the rules -->
<xsl:apply-templates select="node()"/>
<xsl:text>COMMIT&#xA;# Completed&#xA;</xsl:text>
</xsl:template>
<xsl:template name="counters">
<xsl:param name="node"/>
<xsl:text>[</xsl:text>
<xsl:if test="string-length($node/@packet-count)"><xsl:value-of select="$node/@packet-count"/></xsl:if>
<xsl:if test="string-length($node/@packet-count)=0">0</xsl:if>
<xsl:text>:</xsl:text>
<xsl:if test="string-length($node/@byte-count)"><xsl:value-of select="$node/@byte-count"/></xsl:if>
<xsl:if test="string-length($node/@byte-count)=0">0</xsl:if>
<xsl:text>]</xsl:text>
</xsl:template>
<!-- the bit that automatically recurses for us, NOTE: we use * not node(), we don't want to copy every white space text -->
<xsl:template match="@*|node()">
<xsl:copy>
<!-- with libxslt xsltproc we can't do @*|node() or the nodes may get processed before the attributes -->
<xsl:apply-templates select="@*"/>
<xsl:apply-templates select="node()"/>
</xsl:copy>
</xsl:template>
</xsl:transform>
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