gistfile1.txt

<class
    name = "sadl_msg"
    title = "The SADL Message Protocol"
    script = "zproto_codec_c"
    package_dir = "."
    >
    This implements the wireframe SADL protocol
    
    <message name = "PUBLISH">
        Client sends data to a topic
        <field name = "sender" type = "string" />
        <field name = "topic" type = "string" />
        <field name = "data" type = "string" />
    </message>
    
    <message name = "OK">
        Server confirms command was successful
    </message>
    
    <message name = "ERROR">
        Server reports command failure
        <field name = "reason" type = "string" />
    </message>
    
    <message name = "SUBSCRIBE">
        Client subscribes to a topic
        <field name = "sender" type = "string" />
        <field name = "topic" type = "string" />
    </message>
    
    <message name = "CANCEL">
        Client cancels a topic
        <field name = "sender" type = "string" />
        <field name = "topic" type = "string" />
    </message>
    
    <message name = "FETCH">
        Client asks for a message, if any
        <field name = "sender" type = "string" />
    </message>
    
    <message name = "DELIVER">
        Server delivers a message to the client
        <field name = "topic" type = "string" />
        <field name = "data" type = "string" />
    </message>
    
    <message name = "EMPTY">
        Server reports there was nothing to deliver
    </message>
    
    <message name = "SENDTO">
        Client sends a message to another client
        <field name = "sender" type = "string" />
        <field name = "recipient" type = "string" />
        <field name = "data" type = "string" />
    </message>
</class>