<?xml version="1.0" encoding="UTF-8"?>

<!--
  ~ Copyright The WildFly Authors
  ~ SPDX-License-Identifier: Apache-2.0
  -->

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
            targetNamespace="urn:jboss:domain:remoting:1.0"
            xmlns="urn:jboss:domain:remoting:1.0"
            elementFormDefault="qualified"
            attributeFormDefault="unqualified"
            version="1.0">

    <!-- The remoting subsystem root element -->
    <xs:element name="subsystem" type="subsystem"/>

    <xs:complexType name="subsystem">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                The configuration of the Remoting subsystem.

                The 'worker-thread-pool' element configures the worker thread pool.
                The nested "connector" element(s) define connectors for this subsystem.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:sequence>
            <xs:element name="worker-thread-pool" type="workerThreadsType" minOccurs="0"/>
            <xs:element name="connector" type="connector" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>
    
    <xs:complexType name="workerThreadsType">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                The configuration of the worker thread pool.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:attribute name="read-threads" type="xs:integer" use="optional"/>
        <xs:attribute name="write-threads" type="xs:integer" use="optional"/>
        <xs:attribute name="task-core-threads" type="xs:integer" use="optional"/>
        <xs:attribute name="task-max-threads" type="xs:integer" use="optional"/>
        <xs:attribute name="task-keepalive" type="xs:integer" use="optional"/>
        <xs:attribute name="task-limit" type="xs:integer" use="optional"/>
    </xs:complexType>

    <xs:complexType name="connector">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                The configuration of a Remoting connector.

                The "name" attribute specifies the unique name of this connector.

                The "socket-binding" attribute specifies the name (or names) of the socket binding(s) to attach to.

                The optional nested "sasl" element contains the SASL authentication configuration for this connector.

                The optional nested "authentication-provider" element contains the name of the authentication provider to
                use for incoming connections.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:all>
            <!-- xs:element name="ssl-whatever??" type="ref" minOccurs="0" -->
            <xs:element name="sasl" type="sasl" minOccurs="0"/>
            <xs:element name="authentication-provider" type="ref" minOccurs="0"/>
            <xs:element name="properties" type="properties" minOccurs="0"/>
        </xs:all>
        <xs:attribute name="socket-binding" type="name-list" use="required"/>
        <xs:attribute name="name" type="xs:string" use="required"/>
    </xs:complexType>

    <xs:complexType name="sasl">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                The configuration of the SASL authentication layer for this server.

                The optional nested "include-mechanisms" element contains a whitelist of allowed SASL mechanism names.
                No mechanisms will be allowed which are not present in this list.

                The optional nested "qop" element contains a list of quality-of-protection values, in decreasing order
                of preference.

                The optional nested "strength" element contains a list of cipher strength values, in decreasing order
                of preference.

                The optional nested "reuse-session" boolean element specifies whether or not the server should attempt
                to reuse previously authenticated session information.  The mechanism may or may not support such reuse,
                and other factors may also prevent it.

                The optional nested "server-auth" boolean element specifies whether the server should authenticate to the
                client.  Not all mechanisms may support this setting.

                The optional nested "policy" boolean element specifies a policy to use to narrow down the available set
                of mechanisms.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:all>
            <xs:element name="include-mechanisms" type="name-listType" minOccurs="0"/>
            <xs:element name="qop" type="qop-listType" minOccurs="0"/>
            <xs:element name="strength" type="strength" minOccurs="0"/>
            <xs:element name="reuse-session" type="boolean-element" minOccurs="0"/>
            <xs:element name="server-auth" type="boolean-element" minOccurs="0"/>
            <xs:element name="policy" type="policy" minOccurs="0"/>
            <xs:element name="properties" type="properties" minOccurs="0"/>
        </xs:all>
    </xs:complexType>

    <xs:complexType name="policy">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                Policy criteria items to use in order to choose a SASL mechanism.

                The optional nested "forward-secrecy" element contains a boolean value which specifies whether mechanisms
                that implement forward secrecy between sessions are required. Forward secrecy means that breaking into
                one session will not automatically provide information for breaking into future sessions.

                The optional nested "no-active" element contains a boolean value which specifies whether mechanisms
                susceptible to active (non-dictionary) attacks are not permitted.  "false" to permit, "true" to deny.

                The optional nested "no-anonymous" element contains a boolean value which specifies whether mechanisms
                that accept anonymous login are permitted.  "false" to permit, "true" to deny.

                The optional nested "no-dictionary" element contains a boolean value which specifies whether mechanisms
                susceptible to passive dictionary attacks are permitted.  "false" to permit, "true" to deny.

                The optional nested "no-plain-text" element contains a boolean value which specifies whether mechanisms
                susceptible to simple plain passive attacks (e.g., "PLAIN") are not permitted.    "false" to permit, "true" to deny.

                The optional nested "pass-credentials" element contains a boolean value which specifies whether
                mechanisms that pass client credentials are required.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:all>
            <xs:element name="forward-secrecy" type="boolean-element" minOccurs="0"/>
            <xs:element name="no-active" type="boolean-element" minOccurs="0"/>
            <xs:element name="no-anonymous" type="boolean-element" minOccurs="0"/>
            <xs:element name="no-dictionary" type="boolean-element" minOccurs="0"/>
            <xs:element name="no-plain-text" type="boolean-element" minOccurs="0"/>
            <xs:element name="pass-credentials" type="boolean-element" minOccurs="0"/>
        </xs:all>
    </xs:complexType>

    <xs:complexType name="boolean-element">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                An element specifying a boolean value.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:attribute name="value" type="xs:boolean" use="required"/>
    </xs:complexType>

    <xs:complexType name="name-listType">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                An element specifying a string list.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:attribute name="value" type="name-list" use="required"/>
    </xs:complexType>   

    <xs:simpleType name="name-list">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                A set of string items.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:list itemType="xs:string"/>
    </xs:simpleType>

    <xs:complexType name="qop-listType">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                An element specifying a qop list.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:attribute name="value" type="qop-list" use="required"/>
    </xs:complexType>

    <xs:simpleType name="qop-list">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                The SASL quality-of-protection value list.  See http://download.oracle.com/docs/cd/E17409_01/javase/6/docs/api/javax/security/sasl/Sasl.html#QOP
                for more information.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:list>
            <xs:simpleType>
                <xs:restriction base="xs:token">
                    <xs:enumeration value="auth"/>
                    <xs:enumeration value="auth-int"/>
                    <xs:enumeration value="auth-conf"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:list>
    </xs:simpleType>

    <xs:simpleType name="strength">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                The SASL strength value list.  See http://download.oracle.com/docs/cd/E17409_01/javase/6/docs/api/javax/security/sasl/Sasl.html#STRENGTH
                for more information.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:list>
            <xs:simpleType>
                <xs:restriction base="xs:token">
                    <xs:enumeration value="low"/>
                    <xs:enumeration value="medium"/>
                    <xs:enumeration value="high"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:list>
    </xs:simpleType>

    <xs:complexType name="properties">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                A set of free-form properties.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
            <xs:element name="property" type="property"/>
        </xs:choice>
    </xs:complexType>

    <xs:complexType name="property">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                A free-form property.  The name is required; the value is optional.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:attribute name="name" type="xs:string" use="required"/>
        <xs:attribute name="value" type="xs:string" use="optional"/>
    </xs:complexType>

    <xs:complexType name="ref">
        <xs:annotation>
            <xs:documentation>
            <![CDATA[
                A reference to another named service.
            ]]>
            </xs:documentation>
        </xs:annotation>
        <xs:attribute name="name" type="xs:string" use="required"/>
    </xs:complexType>

</xs:schema>
