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###############################################################################
## Copyright 2005-2016 OCSInventory-NG/OCSInventory-Server contributors.
## See the Contributors file for more details about them.
##
## This file is part of OCSInventory-NG/OCSInventory-ocsreports.
##
## OCSInventory-NG/OCSInventory-Server is free software: you can redistribute
## it and/or modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation, either version 2 of the License,
## or (at your option) any later version.
##
## OCSInventory-NG/OCSInventory-Server is distributed in the hope that it
## will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
## of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with OCSInventory-NG/OCSInventory-ocsreports. if not, write to the
## Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
## MA 02110-1301, USA.
################################################################################
package Apache::Ocsinventory::Server::Communication::Session;
use strict;
use Apache::Ocsinventory::Server::System(qw/ :server /);
require Exporter;
our @ISA = qw /Exporter/;
our @EXPORT = qw /
start_session
check_session
kill_session
/;
sub start_session{
my $current_context = shift;
my $dbh = $current_context->{DBI_HANDLE};
my $deviceId = $current_context->{DEVICEID};
clean_sessions( $current_context );
# Trying to start session
if( !$dbh->do( 'INSERT INTO prolog_conntrack(DEVICEID,PID,TIMESTAMP) VALUES(?,?,UNIX_TIMESTAMP())', {}, $deviceId, $$) ){
&_log(525,'session', 'failed') if $ENV{'OCS_OPT_LOGLEVEL'};
return 0;
}
&_log(311,'session', 'started') if $ENV{'OCS_OPT_LOGLEVEL'};
return 1;
}
sub clean_sessions{
my $current_context = shift;
my $dbh = $current_context->{DBI_HANDLE};
# To avoid race conditions
if( !$dbh->do("INSERT INTO engine_mutex(NAME, PID, TAG) VALUES('SESSION',?,'CLEAN')", {}, $$) ){
&_log(315,'session',"already handled") if $ENV{'OCS_OPT_LOGLEVEL'};
return;
}
# We have to make it every SESSION_CLEAN_TIME seconds
my $check_clean = $dbh->prepare('SELECT UNIX_TIMESTAMP()-IVALUE AS IVALUE FROM engine_persistent WHERE NAME="SESSION_CLEAN_DATE"');
if($check_clean->execute() && $check_clean->rows()){
my $row = $check_clean->fetchrow_hashref();
if($row->{IVALUE}< $ENV{OCS_OPT_SESSION_CLEAN_TIME} ){
$dbh->do('DELETE FROM engine_mutex WHERE PID=? AND NAME="SESSION" AND TAG="CLEAN"', {}, $$ );
return;
}
}
&_log(314,'session', "clean(check)") if $ENV{'OCS_OPT_LOGLEVEL'};
# Delete old sessions
$dbh->do('INSERT INTO engine_persistent(NAME,IVALUE) VALUES("SESSION_CLEAN_DATE", UNIX_TIMESTAMP())')
if($dbh->do('UPDATE engine_persistent SET IVALUE=UNIX_TIMESTAMP() WHERE NAME="SESSION_CLEAN_DATE"')==0E0);
my $cleaned = $dbh->do('DELETE FROM prolog_conntrack WHERE UNIX_TIMESTAMP()-TIMESTAMP>?', {}, $ENV{OCS_OPT_SESSION_CLEAN_TIME} );
$dbh->do('DELETE FROM engine_mutex WHERE PID=? AND NAME="SESSION" AND TAG="CLEAN"', {}, $$ );
&_log(316,'session', "clean($cleaned)") if $cleaned && ($cleaned!=0E0) && $ENV{'OCS_OPT_LOGLEVEL'};
}
sub check_session {
my $current_context = shift;
my $dbh = $current_context->{DBI_HANDLE};
my $deviceId = $current_context->{DEVICEID};
unless( $ENV{OCS_OPT_SESSION_VALIDITY_TIME} ){
&_log(317,'session', 'always_true') if $ENV{'OCS_OPT_LOGLEVEL'};
return 1;
}
my $check = $dbh->do('SELECT DEVICEID FROM prolog_conntrack WHERE DEVICEID=? AND (UNIX_TIMESTAMP()-TIMESTAMP<?)',
{}, $deviceId, $ENV{OCS_OPT_SESSION_VALIDITY_TIME});
if(!$check){
&_log(526,'session', 'error') if $ENV{'OCS_OPT_LOGLEVEL'};
return 0;
}
elsif($check==0E0){
&_log(318,'session', 'missing') if $ENV{'OCS_OPT_LOGLEVEL'};
return 0;
}
else{
&_log(319,'session', 'found') if $ENV{'OCS_OPT_LOGLEVEL'};
return 1;
}
}
sub kill_session{
my $current_context = shift;
my $dbh = $current_context->{DBI_HANDLE};
my $deviceId = $current_context->{DEVICEID};
my $code = $dbh->do('DELETE FROM prolog_conntrack WHERE DEVICEID=?', {}, $deviceId);
if(!$code){
&_log(527,'session', 'error') if $ENV{'OCS_OPT_LOGLEVEL'};
return 0;
}
elsif( $code != 0E0 ){
&_log(320,'session', 'end') if $ENV{'OCS_OPT_LOGLEVEL'};
return 1;
}
else{
return 0;
}
}
1;
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