Fred Gleason 7ce4b2ff10 2018-03-11 Fred Gleason <fredg@paravelsystems.com>
* Converted ripcd(8) to use RDApplication.
	* Documented a 'Notification' message type in
	'docs/apis/notification.xml'.
	* Added an 'RDMulticaster' class.
	* Added an 'mcast_recv_test' program in 'tests/'.
	* Added a 'SYSTEM.NOTIFICATION_ADDRESS' field to the database.
	* Incremented the database version to 276.
	* Added an 'Mcast Address for Notifications' control to the
	'System-Wide Settings' dialog in rdadmin(1).
	* Implemented the 'Process Notification' ['ON'] command in
	ripcd(8).
	* Added an 'RDRipc::sendNotification()' method.
	* Added an 'RDRipc::notificationReceived()' signal.
2018-03-11 20:24:39 -04:00

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<?xml version="1.0" encoding="ISO-8859-1"?>
<article xmlns="http://docbook.org/ns/docbook" version="5.0">
<info>
<title>Rivendell Interprocess Communication Protocol</title>
<author>
<personname>
<firstname>Fred</firstname>
<surname>Gleason</surname>
<email>fredg@paravelsystems.com</email>
</personname>
</author>
</info>
<sect1 xml:id="overview">
<title>Overview</title>
<para>
This defines the IP protocol used for communication between different
modules of Rivendell and the
<command>ripcd</command><manvolnum>8</manvolnum> daemon.
</para>
<para>
Connection to ripcd is by means of a TCP SOCK_STREAM connection to TCP
port <userinput>5006</userinput>. The format of a message is as follows:
</para>
<para>
<replaceable>cmd-code</replaceable> [<replaceable>arg</replaceable>] [<replaceable>...</replaceable>]!
</para>
<variablelist>
<varlistentry>
<term>
<replaceable>cmd-code</replaceable>
</term>
<listitem>
<para>
A two letter command code, describing the generic action to be
performed
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<replaceable>arg</replaceable>
</term>
<listitem>
<para>
Zero or more arguments, delimited by spaces or, if the last
argument, by ! (see below)
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
!
</term>
<listitem>
<para>
The ASCII character 33, indicating the end of the command sequence.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect1>
<sect1 xml:id="sect.unprivileged_commands">
<title>Unprivileged Commands</title>
<para>
No authentication is required to execute these.
</para>
<sect2 xml:id="sect.unprivileged_commands.drop_connection">
<title>Drop Connection</title>
<para>
End the session and drop the TCP connection.
</para>
<para>
<userinput>DC!</userinput>
</para>
</sect2>
<sect2 xml:id="sect.unprivileged_commands.send_password">
<title>Send Password</title>
<para>
Send a password to the server for authentication.
</para>
<para>
<userinput>PW <replaceable>passwd</replaceable>!</userinput>
</para>
<variablelist>
<varlistentry>
<term>
<replaceable>passwd</replaceable>
</term>
<listitem>
A password to be supplied before granting the client access.
</listitem>
</varlistentry>
</variablelist>
<para>
<command>ripcd</command><manvolnum>8</manvolnum> will respond
with <computeroutput>PW +!</computeroutput> or
<computeroutput>PW -!</computeroutput>, indicating the success or
failure of the authentication.
</para>
</sect2>
</sect1>
<sect1 xml:id="sect.privileged_commands">
<title>Privileged Commands</title>
<para>
A connection must be authenticated before these can be executed.
</para>
<sect2 xml:id="privileged_commands.request_user">
<title>Request User</title>
<para>
Request the LOGIN_NAME of the user currently logged in.
</para>
<para>
<userinput>RU!</userinput>
</para>
<para>
<command>ripcd</command><manvolnum>8</manvolnum> will respond with
<computeroutput>RU <replaceable>user-name</replaceable>!</computeroutput>.
</para>
<variablelist>
<varlistentry>
<term><replaceable>user-name</replaceable></term>
<listitem>
<para>
The LOGIN_NAME of the user currently logged in.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.set_user">
<title>Set User</title>
<para>
Login in a user.
</para>
<para>
<userinput>SU <replaceable>user-name</replaceable>!</userinput>
</para>
<para>
<command>ripcd</command><manvolnum>8</manvolnum> will respond with
<computeroutput>RU <replaceable>user-name</replaceable>!</computeroutput>.
</para>
<variablelist>
<varlistentry>
<term><replaceable>user-name</replaceable></term>
<listitem>
<para>
The LOGIN_NAME of the user to log in.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.rml_send">
<title>RML Send</title>
<para>
Send an RML command to a specified host.
</para>
<para>
<userinput>MS <replaceable>ip-addr</replaceable>
<replaceable>echo</replaceable>
<replaceable>rml</replaceable>!</userinput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>ip-addr</replaceable></term>
<listitem>
<para>
IPv4 address of the destination, indotted-quad notation.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>echo</replaceable></term>
<listitem>
<para>
<userinput>1</userinput> = Request echo,
<userinput>0</userinput> = Request no echo.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>rml</replaceable></term>
<listitem>
<para>
The RML command to send.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.rml_echo">
<title>RML Echo</title>
<para>
Echo an RML command to a specified host.
</para>
<para>
<userinput>ME <replaceable>ip-addr</replaceable>
<replaceable>echo</replaceable>
<replaceable>rml</replaceable>!</userinput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>ip-addr</replaceable></term>
<listitem>
<para>
IPv4 address of the destination, indotted-quad notation.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>echo</replaceable></term>
<listitem>
<para>
<userinput>1</userinput> = Request echo,
<userinput>0</userinput> = Request no echo.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>rml</replaceable></term>
<listitem>
<para>
The RML command to send.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.get_gpi_carts">
<title>Get GPI Carts</title>
<para>
Return current GPI line cart numbers.
</para>
<para>
<userinput>GC <replaceable>matrix</replaceable>!</userinput>
</para>
<para>
Request the list of macro carts currently assigned for
<replaceable>matrix</replaceable>. The following record will
be returned for each line in the matrix:
</para>
<para>
<computeroutput>GC
<replaceable>matrix</replaceable>
<replaceable>gpi-line</replaceable>
<replaceable>off-cart-num</replaceable>
<replaceable>on-cart-num</replaceable>!</computeroutput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>matrix</replaceable></term>
<listitem>
<para>
The specified matrix number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>gpi-line</replaceable></term>
<listitem>
<para>
The GPI line number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>off-cart-num</replaceable></term>
<listitem>
<para>
The number for the cart to be activated when
<replaceable>gpi-line</replaceable> transitions to an OFF
state. <computeroutput>0</computeroutput> indicates that no
cart is currently set.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>on-cart-num</replaceable></term>
<listitem>
<para>
The number for the cart to be activated when
<replaceable>gpi-line</replaceable> transitions to an ON
state. <computeroutput>0</computeroutput> indicates that no
cart is currently set.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.get_gpo_carts">
<title>Get GPO Carts</title>
<para>
Return current GPO line cart numbers.
</para>
<para>
<userinput>GD <replaceable>matrix</replaceable>!</userinput>
</para>
<para>
Request the list of macro carts currently assigned for
<replaceable>matrix</replaceable>. The following record will
be returned for each line in the matrix:
</para>
<para>
<computeroutput>GC
<replaceable>matrix</replaceable>
<replaceable>gpo-line</replaceable>
<replaceable>off-cart-num</replaceable>
<replaceable>on-cart-num</replaceable>!</computeroutput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>matrix</replaceable></term>
<listitem>
<para>
The specified matrix number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>gpo-line</replaceable></term>
<listitem>
<para>
The GPO line number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>off-cart-num</replaceable></term>
<listitem>
<para>
The number for the cart to be activated when
<replaceable>gpo-line</replaceable> transitions to an OFF
state. <computeroutput>0</computeroutput> indicates that no
cart is currently set.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>on-cart-num</replaceable></term>
<listitem>
<para>
The number for the cart to be activated when
<replaceable>gpo-line</replaceable> transitions to an ON
state. <computeroutput>0</computeroutput> indicates that no
cart is currently set.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.get_gpi_states">
<title>Get GPI States</title>
<para>
Return current GPI states.
</para>
<para>
<userinput>GI <replaceable>matrix</replaceable>!</userinput>
</para>
<para>
Request the list of current GPI states for
<replaceable>matrix</replaceable>. The following record will
be returned for each line in the matrix:
</para>
<para>
<computeroutput>GI
<replaceable>matrix</replaceable>
<replaceable>gpi-line</replaceable>
<replaceable>state</replaceable>
<replaceable>mask</replaceable>!</computeroutput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>matrix</replaceable></term>
<listitem>
<para>
The specified matrix number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>gpi-line</replaceable></term>
<listitem>
<para>
The GPI line number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>state</replaceable></term>
<listitem>
<para>
<computeroutput>1</computeroutput> = GPI is ON,
<computeroutput>0</computeroutput> = GPI is OFF.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>mask</replaceable></term>
<listitem>
<para>
<computeroutput>1</computeroutput> = GPI is ENABLED,
<computeroutput>0</computeroutput> = GPI is DISABLED.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.get_gpo_states">
<title>Get GPO States</title>
<para>
Return current GPO states.
</para>
<para>
<userinput>GO <replaceable>matrix</replaceable>!</userinput>
</para>
<para>
Request the list of current GPO states for
<replaceable>matrix</replaceable>. The following record will
be returned for each line in the matrix:
</para>
<para>
<computeroutput>GI
<replaceable>matrix</replaceable>
<replaceable>gpo-line</replaceable>
<replaceable>state</replaceable>
<replaceable>mask</replaceable>!</computeroutput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>matrix</replaceable></term>
<listitem>
<para>
The specified matrix number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>gpo-line</replaceable></term>
<listitem>
<para>
The GPO line number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>state</replaceable></term>
<listitem>
<para>
<computeroutput>1</computeroutput> = GPO is ON,
<computeroutput>0</computeroutput> = GPO is OFF.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>mask</replaceable></term>
<listitem>
<para>
<computeroutput>1</computeroutput> = GPO is ENABLED,
<computeroutput>0</computeroutput> = GPO is DISABLED.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.get_gpi_mask_states">
<title>Get GPI Mask States</title>
<para>
Return current GPI mask states.
</para>
<para>
<userinput>GM <replaceable>matrix</replaceable>!</userinput>
</para>
<para>
Request the list of current GPI mask states for
<replaceable>matrix</replaceable>. The following record will
be returned for each line in the matrix:
</para>
<para>
<computeroutput>GI
<replaceable>matrix</replaceable>
<replaceable>gpi-line</replaceable>
<replaceable>mask</replaceable>!</computeroutput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>matrix</replaceable></term>
<listitem>
<para>
The specified matrix number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>gpi-line</replaceable></term>
<listitem>
<para>
The GPI line number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>mask</replaceable></term>
<listitem>
<para>
<computeroutput>1</computeroutput> = GPI is ENABLED,
<computeroutput>0</computeroutput> = GPI is DISABLED.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.get_gpo_mask_states">
<title>Get GPO Mask States</title>
<para>
Return current GPO mask states.
</para>
<para>
<userinput>GM <replaceable>matrix</replaceable>!</userinput>
</para>
<para>
Request the list of current GPO mask states for
<replaceable>matrix</replaceable>. The following record will
be returned for each line in the matrix:
</para>
<para>
<computeroutput>GN
<replaceable>matrix</replaceable>
<replaceable>gpo-line</replaceable>
<replaceable>mask</replaceable>!</computeroutput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>matrix</replaceable></term>
<listitem>
<para>
The specified matrix number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>gpo-line</replaceable></term>
<listitem>
<para>
The GPO line number.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>mask</replaceable></term>
<listitem>
<para>
<computeroutput>1</computeroutput> = GPO is ENABLED,
<computeroutput>0</computeroutput> = GPO is DISABLED.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.reload_gpi_table">
<title>Reload GPI Table</title>
<para>
Reload the GPI table in <command>ripcd</command><manvolnum>8</manvolnum>.
</para>
<para>
<userinput>RG!</userinput>
</para>
</sect2>
<sect2 xml:id="privileged_commands.get_onair_flag">
<title>Get OnAir Flag</title>
<para>
Request the state of the OnAir flag.
</para>
<para>
<userinput>TA!</userinput>
</para>
<para>
The following record will be returned:
</para>
<para>
<computeroutput>TA<replaceable>state</replaceable>!</computeroutput>
</para>
<variablelist>
<varlistentry>
<term><replaceable>state</replaceable></term>
<listitem>
<para>
<computeroutput>1</computeroutput> = Active,
<computeroutput>0</computeroutput> = Disabled.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
<sect2 xml:id="privileged_commands.process_notification">
<title>Process Notification</title>
<para>
Send or Receive an Object Notification
</para>
<para>
<userinput>ON <replaceable>notify</replaceable>!</userinput>
</para>
<para>
Send the <replaceable>notify</replaceable> to all other active
Rivendell modules.
</para>
<note>
<para>
See the Rivendell Notification Protocol API document for a description
of the contents of <replaceable>notify</replaceable>.
</para>
</note>
</sect2>
</sect1>
</article>