version 1.10, 2003/09/15 09:25:57
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version 1.14, 2003/10/28 10:47:44
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Line 25
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# |
# |
# http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
# |
# |
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package LondConnection; |
package LondConnection; |
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use strict; |
use strict; |
Line 35 use IO::File;
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Line 36 use IO::File;
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use Fcntl; |
use Fcntl; |
use POSIX; |
use POSIX; |
use Crypt::IDEA; |
use Crypt::IDEA; |
use LONCAPA::Configuration; |
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use LONCAPA::HashIterator; |
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my $DebugLevel=0; |
my $DebugLevel=0; |
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my %hostshash; |
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my %perlvar; |
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# |
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# The config read is done in this way to support the read of |
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# the non-default configuration file in the |
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# event we are being used outside of loncapa. |
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# |
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my $ConfigRead = 0; |
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# Read the configuration file for apache to get the perl |
# Read the configuration file for apache to get the perl |
# variable set. |
# variable set. |
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my $perlvarref = LONCAPA::Configuration::read_conf('loncapa.conf'); |
sub ReadConfig { |
my %perlvar = %{$perlvarref}; |
my $perlvarref = read_conf('loncapa.conf'); |
my $hoststab = |
%perlvar = %{$perlvarref}; |
LONCAPA::Configuration::read_hosts( |
my $hoststab = read_hosts( |
"$perlvar{'lonTabDir'}/hosts.tab") || |
"$perlvar{'lonTabDir'}/hosts.tab") || |
die "Can't read host table!!"; |
die "Can't read host table!!"; |
my %hostshash = %{$hoststab}; |
%hostshash = %{$hoststab}; |
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close(CONFIG); |
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} |
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close(CONFIG); |
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sub Debug { |
sub Debug { |
my $level = shift; |
my $level = shift; |
Line 65 sub Debug {
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Line 81 sub Debug {
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=head2 Dump |
=head2 Dump |
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Dump the internal state of the object: For debugging purposes. |
Dump the internal state of the object: For debugging purposes, to stderr. |
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=cut |
=cut |
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Line 75 sub Dump {
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Line 91 sub Dump {
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my $value; |
my $value; |
print "Dumping LondConnectionObject:\n"; |
print "Dumping LondConnectionObject:\n"; |
while(($key, $value) = each %$self) { |
while(($key, $value) = each %$self) { |
print "$key -> $value\n"; |
print STDERR "$key -> $value\n"; |
} |
} |
print "-------------------------------\n"; |
print "-------------------------------\n"; |
} |
} |
Line 100 sub Transition {
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Line 116 sub Transition {
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} |
} |
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=pod |
=pod |
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=head2 new |
=head2 new |
Line 122 sub new {
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Line 139 sub new {
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my $class = shift; # class name. |
my $class = shift; # class name. |
my $Hostname = shift; # Name of host to connect to. |
my $Hostname = shift; # Name of host to connect to. |
my $Port = shift; # Port to connect |
my $Port = shift; # Port to connect |
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if (!$ConfigRead) { |
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ReadConfig(); |
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$ConfigRead = 1; |
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} |
&Debug(4,$class."::new( ".$Hostname.",".$Port.")\n"); |
&Debug(4,$class."::new( ".$Hostname.",".$Port.")\n"); |
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# The host must map to an entry in the hosts table: |
# The host must map to an entry in the hosts table: |
Line 157 sub new {
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Line 179 sub new {
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PeerPort => $self->{Port}, |
PeerPort => $self->{Port}, |
Type => SOCK_STREAM, |
Type => SOCK_STREAM, |
Proto => "tcp", |
Proto => "tcp", |
Timeout => 5)) { |
Timeout => 3)) { |
return undef; # Inidicates the socket could not be made. |
return undef; # Inidicates the socket could not be made. |
} |
} |
# |
# |
Line 276 sub Readable {
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Line 298 sub Readable {
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$key=substr($key,0,32); |
$key=substr($key,0,32); |
my $cipherkey=pack("H32",$key); |
my $cipherkey=pack("H32",$key); |
$self->{Cipher} = new IDEA $cipherkey; |
$self->{Cipher} = new IDEA $cipherkey; |
if($self->{Cipher} == undef) { |
if($self->{Cipher} eq undef) { |
$self->Transition("Disconnected"); |
$self->Transition("Disconnected"); |
$socket->close(); |
$socket->close(); |
return -1; |
return -1; |
Line 689 are used as follows:
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Line 711 are used as follows:
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[1] - LonCapa domain name. |
[1] - LonCapa domain name. |
[2] - Loncapa role (e.g. library or access). |
[2] - Loncapa role (e.g. library or access). |
[3] - DNS name server hostname. |
[3] - DNS name server hostname. |
[4] - IP address (result of e.g. nslooup [3]). |
[4] - IP address (result of e.g. nslookup [3]). |
[5] - Maximum connection count. |
[5] - Maximum connection count. |
[6] - Idle timeout for reducing connection count. |
[6] - Idle timeout for reducing connection count. |
[7] - Minimum connection count. |
[7] - Minimum connection count. |
Line 701 sub GetHostIterator {
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Line 723 sub GetHostIterator {
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return HashIterator->new(\%hostshash); |
return HashIterator->new(\%hostshash); |
} |
} |
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########################################################### |
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# |
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# The following is an unashamed kludge that is here to |
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# allow LondConnection to be used outside of the |
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# loncapa environment (e.g. by lonManage). |
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# |
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# This is a textual inclusion of pieces of the |
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# Configuration.pm module. |
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# |
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my $confdir='/etc/httpd/conf/'; |
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# ------------------- Subroutine read_conf: read LON-CAPA server configuration. |
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# This subroutine reads PerlSetVar values out of specified web server |
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# configuration files. |
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sub read_conf |
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{ |
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my (@conf_files)=@_; |
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my %perlvar; |
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foreach my $filename (@conf_files,'loncapa_apache.conf') |
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{ |
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open(CONFIG,'<'.$confdir.$filename) or |
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die("Can't read $confdir$filename"); |
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while (my $configline=<CONFIG>) |
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{ |
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if ($configline =~ /^[^\#]*PerlSetVar/) |
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{ |
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my ($unused,$varname,$varvalue)=split(/\s+/,$configline); |
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chomp($varvalue); |
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$perlvar{$varname}=$varvalue; |
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} |
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} |
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close(CONFIG); |
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} |
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my $perlvarref=\%perlvar; |
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return ($perlvarref); |
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} |
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#---------------------- Subroutine read_hosts: Read a LON-CAPA hosts.tab |
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# formatted configuration file. |
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# |
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my $RequiredCount = 5; # Required item count in hosts.tab. |
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my $DefaultMaxCon = 5; # Default value for maximum connections. |
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my $DefaultIdle = 1000; # Default connection idle time in seconds. |
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my $DefaultMinCon = 0; # Default value for minimum connections. |
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sub read_hosts { |
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my $Filename = shift; |
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my %HostsTab; |
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open(CONFIG,'<'.$Filename) or die("Can't read $Filename"); |
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while (my $line = <CONFIG>) { |
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if (!($line =~ /^\s*\#/)) { |
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my @items = split(/:/, $line); |
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if(scalar @items >= $RequiredCount) { |
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if (scalar @items == $RequiredCount) { # Only required items: |
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$items[$RequiredCount] = $DefaultMaxCon; |
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} |
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if(scalar @items == $RequiredCount + 1) { # up through maxcon. |
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$items[$RequiredCount+1] = $DefaultIdle; |
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} |
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if(scalar @items == $RequiredCount + 2) { # up through idle. |
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$items[$RequiredCount+2] = $DefaultMinCon; |
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} |
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{ |
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my @list = @items; # probably not needed but I'm unsure of |
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# about the scope of item so... |
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$HostsTab{$list[0]} = \@list; |
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} |
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} |
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} |
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} |
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close(CONFIG); |
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my $hostref = \%HostsTab; |
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return ($hostref); |
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} |
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1; |
1; |
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=pod |
=pod |