595 lines
18 KiB
Perl
595 lines
18 KiB
Perl
#!/usr/bin/perl -wT
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#
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# ==========================================================================
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#
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# ZoneMinder External Trigger Script, $Date: 2008-07-25 10:48:16 +0100 (Fri, 25 Jul 2008) $, $Revision: 2612 $
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# Copyright (C) 2001-2008 Philip Coombes
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# ==========================================================================
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=head1 NAME
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zmtrigger.pl - ZoneMinder External Trigger Script
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=head1 DESCRIPTION
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This script is used to trigger and cancel alarms from external connections
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using an arbitrary text based format.
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This script offers generic solution to external triggering of alarms. It
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can handle external connections via either internet socket, unix socket or
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file/device interfaces. You can either use it 'as is' if you can interface
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with the existing format, or override connections and channels to customise
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it to your needs.
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If enabled by the OPT_TRIGGERS option, Zoneminder service start
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zmtrigger.pl which listens for control messages on TCP port 6802.
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=head1 TRIGGER MESSAGE FORMAT
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B<id>|B<action>|B<score>|B<cause>|B<text>|B<showtext>
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=over 4
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=item B<id>
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is the id number or name of the ZM monitor.
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=item B<action>
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Valid actions are 'on', 'off', 'cancel' or 'show' where
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'on' forces an alarm condition on;
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'off' forces an alarm condition off;
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'cancel' negates the previous 'on' or 'off'.
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The 'show' action merely updates some auxiliary text which can optionally
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be displayed in the images captured by the monitor. Ordinarily you would
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use 'on' and 'cancel', 'off' would tend to be used to suppress motion
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based events. Additionally 'on' and 'off' can take an additional time
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offset, e.g. on+20 which automatically 'cancel's the previous action
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after that number of seconds.
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=item B<score>
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is the score given to the alarm, usually to indicate it's
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importance. For 'on' triggers it should be non-zero, otherwise it should
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be zero.
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=item B<cause>
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is a 32 char max string indicating the reason for, or source of
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the alarm e.g. 'Relay 1 open'. This is saved in the 'Cause' field of the
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event. Ignored for 'off' or 'cancel' messages.
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=item B<text>
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is a 256 char max additional info field, which is saved in the
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'Description' field of an event. Ignored for 'off' or 'cancel' messages.
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=item B<showtext>
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is up to 32 characters of text that can be displayed in the
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timestamp that is added to images. The 'show' action is designed to
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update this text without affecting alarms but the text is updated, if
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present, for any of the actions. This is designed to allow external input
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to appear on the images captured, for instance temperature or personnel
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identity etc.
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=back
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Note that multiple messages can be sent at once and should be LF or CRLF
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delimited. This script is not necessarily intended to be a solution in
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itself, but is intended to be used as 'glue' to help ZoneMinder interface
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with other systems. It will almost certainly require some customisation
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before you can make any use of it. If all you want to do is generate alarms
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from external sources then using the ZoneMinder::SharedMem perl module is
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likely to be easier.
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=head1 EXAMPLES
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3|on+10|1|motion|text|showtext
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Triggers "alarm" on camera #3 for 10 seconds with score=1, cause="motion".
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=cut
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use strict;
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use bytes;
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# ==========================================================================
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#
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# User config
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#
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# ==========================================================================
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use constant MAX_CONNECT_DELAY => 10;
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use constant MONITOR_RELOAD_INTERVAL => 300;
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use constant SELECT_TIMEOUT => 0.25;
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# ==========================================================================
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#
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# Channel/Connection Modules
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#
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# ==========================================================================
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@EXTRA_PERL_LIB@
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use ZoneMinder;
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use ZoneMinder::Trigger::Channel::Inet;
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use ZoneMinder::Trigger::Channel::Unix;
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use ZoneMinder::Trigger::Channel::Serial;
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use ZoneMinder::Trigger::Connection;
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my @connections;
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push( @connections,
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ZoneMinder::Trigger::Connection->new(
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name=>"Chan1",
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channel=>ZoneMinder::Trigger::Channel::Inet->new( port=>6802 ),
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mode=>"rw"
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)
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);
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push( @connections,
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ZoneMinder::Trigger::Connection->new(
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name=>"Chan2",
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channel=>ZoneMinder::Trigger::Channel::Unix->new(
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path=>$Config{ZM_PATH_SOCKS}.'/zmtrigger.sock'
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),
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mode=>"rw"
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)
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);
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#push( @connections, ZoneMinder::Trigger::Connection->new( name=>"Chan3", channel=>ZoneMinder::Trigger::Channel::File->new( path=>'/tmp/zmtrigger.out' ), mode=>"w" ) );
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#push( @connections, ZoneMinder::Trigger::Connection->new( name=>"Chan4", channel=>ZoneMinder::Trigger::Channel::Serial->new( path=>'/dev/ttyS0' ), mode=>"rw" ) );
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# ==========================================================================
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#
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# Don't change anything from here on down
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#
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# ==========================================================================
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use DBI;
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#use Socket;
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use autouse 'Data::Dumper'=>qw(Dumper);
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use POSIX qw( EINTR );
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use Time::HiRes qw( usleep );
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$| = 1;
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$ENV{PATH} = '/bin:/usr/bin';
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$ENV{SHELL} = '/bin/sh' if exists $ENV{SHELL};
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delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};
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logInit();
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logSetSignal();
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Info( "Trigger daemon starting\n" );
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my $dbh = zmDbConnect();
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my $base_rin = '';
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foreach my $connection ( @connections )
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{
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Info( "Opening connection '$connection->{name}'\n" );
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$connection->open();
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}
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my @in_select_connections = grep { $_->input() && $_->selectable() } @connections;
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my @in_poll_connections = grep { $_->input() && !$_->selectable() } @connections;
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my @out_connections = grep { $_->output() } @connections;
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foreach my $connection ( @in_select_connections )
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{
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vec( $base_rin, $connection->fileno(), 1 ) = 1;
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}
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my %spawned_connections;
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my %monitors;
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my $monitor_reload_time = 0;
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$! = undef;
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my $rin = '';
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my $win = $rin;
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my $ein = $win;
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my $timeout = SELECT_TIMEOUT;
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my %actions;
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while( 1 )
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{
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$rin = $base_rin;
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# Add the file descriptors of any spawned connections
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foreach my $fileno ( keys(%spawned_connections) )
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{
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vec( $rin, $fileno, 1 ) = 1;
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}
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my $nfound = select( my $rout = $rin, undef, my $eout = $ein, $timeout );
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if ( $nfound > 0 )
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{
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Debug( "Got input from $nfound connections\n" );
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foreach my $connection ( @in_select_connections )
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{
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if ( vec( $rout, $connection->fileno(), 1 ) )
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{
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Debug( "Got input from connection "
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.$connection->name()
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." ("
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.$connection->fileno()
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.")\n"
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);
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if ( $connection->spawns() )
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{
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my $new_connection = $connection->accept();
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$spawned_connections{$new_connection->fileno()} = $new_connection;
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Debug( "Added new spawned connection ("
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.$new_connection->fileno()
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."), "
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.int(keys(%spawned_connections))
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." spawned connections\n"
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);
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}
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else
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{
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my $messages = $connection->getMessages();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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}
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}
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foreach my $connection ( values(%spawned_connections) )
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{
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if ( vec( $rout, $connection->fileno(), 1 ) )
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{
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Debug( "Got input from spawned connection "
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.$connection->name()
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." ("
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.$connection->fileno()
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.")\n"
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);
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my $messages = $connection->getMessages();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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else
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{
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delete( $spawned_connections{$connection->fileno()} );
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Debug( "Removed spawned connection ("
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.$connection->fileno()
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."), "
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.int(keys(%spawned_connections))
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." spawned connections\n"
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);
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$connection->close();
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}
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}
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}
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}
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elsif ( $nfound < 0 )
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{
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if ( $! == EINTR )
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{
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# Do nothing
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}
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else
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{
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Fatal( "Can't select: $!" );
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}
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}
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# Check polled connections
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foreach my $connection ( @in_poll_connections )
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{
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my $messages = $connection->getMessages();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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# Check for alarms that might have happened
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my @out_messages;
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foreach my $monitor ( values(%monitors) )
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{
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my ( $state, $last_event )
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= zmMemRead( $monitor,
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[ "shared_data:state",
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"shared_data:last_event"
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]
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);
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#print( "$monitor->{Id}: S:$state, LE:$last_event\n" );
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#print( "$monitor->{Id}: mS:$monitor->{LastState}, mLE:$monitor->{LastEvent}\n" );
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if ( $state == STATE_ALARM
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|| $state == STATE_ALERT
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) # In alarm state
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{
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if ( !defined($monitor->{LastEvent})
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|| ($last_event != $monitor->{LastEvent})
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) # A new event
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{
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push( @out_messages, $monitor->{Id}."|on|".time()."|".$last_event );
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}
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else # The same one as last time, so ignore it
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{
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# Do nothing
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}
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}
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elsif ( ($state == STATE_IDLE
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&& $monitor->{LastState} != STATE_IDLE
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)
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|| ($state == STATE_TAPE
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&& $monitor->{LastState} != STATE_TAPE
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)
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) # Out of alarm state
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{
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push( @out_messages, $monitor->{Id}."|off|".time()."|".$last_event );
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}
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elsif ( defined($monitor->{LastEvent})
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&& ($last_event != $monitor->{LastEvent})
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) # We've missed a whole event
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{
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push( @out_messages, $monitor->{Id}."|on|".time()."|".$last_event );
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push( @out_messages, $monitor->{Id}."|off|".time()."|".$last_event );
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}
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$monitor->{LastState} = $state;
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$monitor->{LastEvent} = $last_event;
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}
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foreach my $connection ( @out_connections )
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{
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if ( $connection->canWrite() )
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{
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$connection->putMessages( \@out_messages );
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}
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}
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foreach my $connection ( values(%spawned_connections) )
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{
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if ( $connection->canWrite() )
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{
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$connection->putMessages( \@out_messages );
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}
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}
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Debug( "Checking for timed actions\n" )
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if ( int(keys(%actions)) );
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my $now = time();
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foreach my $action_time ( sort( grep { $_ < $now } keys( %actions ) ) )
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{
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Info( "Found actions expiring at $action_time\n" );
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foreach my $action ( @{$actions{$action_time}} )
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{
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my $connection = $action->{connection};
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my $message = $action->{message};
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Info( "Found action '$message'\n" );
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handleMessage( $connection, $message );
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}
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delete( $actions{$action_time} );
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}
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# Allow connections to do their own timed actions
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foreach my $connection ( @connections )
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{
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my $messages = $connection->timedActions();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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foreach my $connection ( values(%spawned_connections) )
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{
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my $messages = $connection->timedActions();
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if ( defined($messages) )
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{
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foreach my $message ( @$messages )
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{
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handleMessage( $connection, $message );
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}
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}
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}
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# If necessary reload monitors
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if ( (time() - $monitor_reload_time) > MONITOR_RELOAD_INTERVAL )
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{
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foreach my $monitor ( values(%monitors) )
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{
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# Free up any used memory handle
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zmMemInvalidate( $monitor );
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}
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loadMonitors();
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}
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}
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Info( "Trigger daemon exiting\n" );
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exit;
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sub loadMonitors
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{
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Debug( "Loading monitors\n" );
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$monitor_reload_time = time();
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my %new_monitors = ();
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my $sql = "SELECT * FROM Monitors
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WHERE find_in_set( Function, 'Modect,Mocord,Nodect' )".
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( $Config{ZM_SERVER_ID} ? 'AND ServerId=?' : '' )
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;
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my $sth = $dbh->prepare_cached( $sql )
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or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
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my $res = $sth->execute( $Config{ZM_SERVER_ID} ? $Config{ZM_SERVER_ID} : () )
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or Fatal( "Can't execute: ".$sth->errstr() );
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while( my $monitor = $sth->fetchrow_hashref() )
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{
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next if ( !zmMemVerify( $monitor ) ); # Check shared memory ok
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if ( defined($monitors{$monitor->{Id}}->{LastState}) )
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{
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$monitor->{LastState} = $monitors{$monitor->{Id}}->{LastState};
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}
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else
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{
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$monitor->{LastState} = zmGetMonitorState( $monitor );
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}
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if ( defined($monitors{$monitor->{Id}}->{LastEvent}) )
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{
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$monitor->{LastEvent} = $monitors{$monitor->{Id}}->{LastEvent};
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}
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else
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{
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$monitor->{LastEvent} = zmGetLastEvent( $monitor );
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}
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$new_monitors{$monitor->{Id}} = $monitor;
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}
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%monitors = %new_monitors;
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}
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sub handleMessage
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{
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my $connection = shift;
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my $message = shift;
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my ( $id, $action, $score, $cause, $text, $showtext )
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= split( /\|/, $message );
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$score = 0 if ( !defined($score) );
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$cause = "" if ( !defined($cause) );
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$text = "" if ( !defined($text) );
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my $monitor = $monitors{$id};
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if ( !$monitor )
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{
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Warning( "Can't find monitor '$id' for message '$message'\n" );
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return;
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}
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Debug( "Found monitor for id '$id'\n" );
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next if ( !zmMemVerify( $monitor ) );
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Debug( "Handling action '$action'\n" );
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if ( $action =~ /^(enable|disable)(?:\+(\d+))?$/ )
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{
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my $state = $1;
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my $delay = $2;
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if ( $state eq "enable" )
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{
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zmMonitorEnable( $monitor );
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}
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else
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{
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zmMonitorDisable( $monitor );
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}
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# Force a reload
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$monitor_reload_time = 0;
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Info( "Set monitor to $state\n" );
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if ( $delay )
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{
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my $action_time = time()+$delay;
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my $action_text = $id."|".( ($state eq "enable")
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? "disable"
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: "enable"
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)
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;
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my $action_array = $actions{$action_time};
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if ( !$action_array )
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{
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$action_array = $actions{$action_time} = [];
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}
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push( @$action_array, { connection=>$connection,
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message=>$action_text
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}
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);
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Debug( "Added timed event '$action_text', expires at $action_time (+$delay secs)\n" );
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}
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}
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elsif ( $action =~ /^(on|off)(?:[ \+](\d+))?$/ )
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{
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next if ( !$monitor->{Enabled} );
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my $trigger = $1;
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my $delay = $2;
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my $trigger_data;
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if ( $trigger eq "on" )
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{
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zmTriggerEventOn( $monitor, $score, $cause, $text );
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zmTriggerShowtext( $monitor, $showtext ) if defined($showtext);
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Info( "Trigger '$trigger' '$cause'\n" );
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}
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elsif ( $trigger eq "off" )
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{
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my $last_event = zmGetLastEvent( $monitor );
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zmTriggerEventOff( $monitor );
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zmTriggerShowtext( $monitor, $showtext ) if defined($showtext);
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Info( "Trigger '$trigger'\n" );
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# Wait til it's finished
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while( zmInAlarm( $monitor )
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&& ($last_event == zmGetLastEvent( $monitor ))
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)
|
|
{
|
|
# Tenth of a second
|
|
usleep( 100000 );
|
|
}
|
|
zmTriggerEventCancel( $monitor );
|
|
}
|
|
else
|
|
{
|
|
Info( "Trigger '$trigger'\n" );
|
|
zmTriggerEventCancel( $monitor );
|
|
}
|
|
if ( $delay )
|
|
{
|
|
my $action_time = time()+$delay;
|
|
#my $action_text = $id."|cancel|0|".$cause."|".$text;
|
|
my $action_text = $id."|cancel";
|
|
my $action_array = $actions{$action_time};
|
|
if ( !$action_array )
|
|
{
|
|
$action_array = $actions{$action_time} = [];
|
|
}
|
|
push( @$action_array, { connection=>$connection,
|
|
message=>$action_text
|
|
}
|
|
);
|
|
Debug( "Added timed event '$action_text', expires at $action_time (+$delay secs)\n" );
|
|
}
|
|
}
|
|
elsif( $action eq "cancel" )
|
|
{
|
|
zmTriggerEventCancel( $monitor );
|
|
zmTriggerShowtext( $monitor, $showtext ) if defined($showtext);
|
|
Info( "Cancelled event\n" );
|
|
}
|
|
elsif( $action eq "show" )
|
|
{
|
|
zmTriggerShowtext( $monitor, $showtext );
|
|
Info( "Updated show text to '$showtext'\n" );
|
|
}
|
|
else
|
|
{
|
|
Error( "Unrecognised action '$action' in message '$message'\n" );
|
|
}
|
|
} # end sub handleMessage
|
|
|
|
1;
|
|
__END__
|