add the command match
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package Net::Connection::Match::Command;
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use 5.006;
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use strict;
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use warnings;
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use Proc::ProcessTable;
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=head1 NAME
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Net::Connection::Match::Command - Check if the process command PID matches fix regexp for a Net::Connection object.
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=head1 VERSION
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Version 0.0.0
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=cut
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our $VERSION = '0.0.0';
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=head1 SYNOPSIS
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use Net::Connection::Match::Command;
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use Net::Connection;
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my $connection_args={
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foreign_host=>'10.0.0.1',
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foreign_port=>'22',
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local_host=>'10.0.0.2',
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local_port=>'12322',
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proto=>'tcp4',
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state=>'ESTABLISHED',
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pid=>0,
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};
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my $conn=Net::Connection->new( $connection_args );
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my %args=(
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commands=>[
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'kernel',
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],
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);
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my $checker=Net::Connection::Match::Command->new( \%args );
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if ( $checker->match( $conn ) ){
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print "It matches.\n";
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}
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=head1 METHODS
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=head2 new
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This intiates the object.
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The key in the hash ref commands is a array
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that holds regular expressions to match against
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the command line or fname(in case of blank command
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line). At least one value must be defined.
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If the new method fails, it dies.
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my %args=(
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commands=>[
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'kernel',
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],
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);
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my $checker=Net::Connection::Match::Command->new( \%args );
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=cut
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sub new{
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my %args;
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if(defined($_[1])){
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%args= %{$_[1]};
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};
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# run some basic checks to make sure we have the minimum stuff required to work
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if ( ! defined( $args{commands} ) ){
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die ('No commands key specified in the argument hash');
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}
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if ( ref( \$args{commands} ) eq 'ARRAY' ){
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die ('The commands key is not a array');
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}
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if ( ! defined $args{commands}[0] ){
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die ('Nothing defined in the commands array');
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}
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my $self = {
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commands=>$args{commands},
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};
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bless $self;
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return $self;
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}
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=head2 match
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Checks if a single Net::Connection object matches the stack.
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One argument is taken and that is a Net::Connection object.
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The returned value is a boolean.
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if ( $checker->match( $conn ) ){
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print "The connection matches.\n";
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}
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=cut
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sub match{
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my $self=$_[0];
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my $object=$_[1];
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if ( !defined( $object ) ){
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return 0;
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}
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if ( ref( $object ) ne 'Net::Connection' ){
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return 0;
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}
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my $conn_pid=$object->pid;
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# don't bother proceeding, the object won't match ever
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# as it does not have a PID
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if ( ! defined( $conn_pid ) ){
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return 0;
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}
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# go through each proc and look for a matching pid
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my $proctable=Proc::ProcessTable->new;
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my @procs=$proctable->table;
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my $loop=1;
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my $proc_int=0;
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my $command;
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while (
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$loop &&
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defined( $procs[$proc_int] )
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){
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if ( $conn_pid eq $procs[$proc_int]->pid ){
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my $command=$procs[$proc_int]->cmndline;
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# '' means it is a kernel process
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if ( $command =~ /^$/ ){
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$command='['.$procs[$proc_int]->fname.']';
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}
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# exit the loop as we found it
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$loop=0;
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}
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$proc_int++;
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}
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# likely a dead connection that is handing around...
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# or disappeared since grabbing the connection list
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# and starting processing
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if ( !defined( $command ) ){
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return 0;
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}
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# check each command regex and see if any of them match
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foreach my $regex ( @{ $self->{commands} } ){
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if ( $command =~ /$regex/ ){
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return 1;
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}
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}
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return 0;
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}
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=head1 AUTHOR
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Zane C. Bowers-Hadley, C<< <vvelox at vvelox.net> >>
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=head1 BUGS
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Please report any bugs or feature requests to C<bug-net-connection-match at rt.cpan.org>, or through
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the web interface at L<https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Net-Connection-Match>. I will be notified, and then you'll
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automatically be notified of progress on your bug as I make changes.
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=head1 SUPPORT
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You can find documentation for this module with the perldoc command.
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perldoc Net::Connection::Match
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You can also look for information at:
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=over 4
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=item * RT: CPAN's request tracker (report bugs here)
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L<https://rt.cpan.org/NoAuth/Bugs.html?Dist=Net-Connection-Match>
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=item * AnnoCPAN: Annotated CPAN documentation
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L<http://annocpan.org/dist/Net-Connection-Match>
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=item * CPAN Ratings
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L<https://cpanratings.perl.org/d/Net-Connection-Match>
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=item * Search CPAN
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L<https://metacpan.org/release/Net-Connection-Match>
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=back
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=head1 ACKNOWLEDGEMENTS
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=head1 LICENSE AND COPYRIGHT
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Copyright 2019 Zane C. Bowers-Hadley.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the the Artistic License (2.0). You may obtain a
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copy of the full license at:
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L<http://www.perlfoundation.org/artistic_license_2_0>
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Any use, modification, and distribution of the Standard or Modified
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Versions is governed by this Artistic License. By using, modifying or
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distributing the Package, you accept this license. Do not use, modify,
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or distribute the Package, if you do not accept this license.
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If your Modified Version has been derived from a Modified Version made
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by someone other than you, you are nevertheless required to ensure that
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your Modified Version complies with the requirements of this license.
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This license does not grant you the right to use any trademark, service
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mark, tradename, or logo of the Copyright Holder.
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This license includes the non-exclusive, worldwide, free-of-charge
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patent license to make, have made, use, offer to sell, sell, import and
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otherwise transfer the Package with respect to any patent claims
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licensable by the Copyright Holder that are necessarily infringed by the
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Package. If you institute patent litigation (including a cross-claim or
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counterclaim) against any party alleging that the Package constitutes
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direct or contributory patent infringement, then this Artistic License
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to you shall terminate on the date that such litigation is filed.
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Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER
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AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
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THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY
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YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR
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CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR
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CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=cut
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1; # End of Net::Connection::Match
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