+package VLDAP::Server;
+
+use strict;
+use warnings;
+
+use Net::LDAP::Constant qw(
+ LDAP_SUCCESS
+ LDAP_STRONG_AUTH_NOT_SUPPORTED
+ LDAP_UNAVAILABLE
+ LDAP_OPERATIONS_ERROR
+);
+use Net::LDAP::Server;
+use Net::LDAP::Filter;
+use base qw(Net::LDAP::Server);
+use fields qw(upstream);
+
+use URI::Escape; # uri_escape
+use IO::Socket::INET;
+use IO::Select;
+
+use Data::Dump qw/dump/;
+
+=head1 NAME
+
+A3C::LDAP::Server
+
+=cut
+
+=head1 DESCRIPTION
+
+Provide LDAP server functionality for L<A3C> somewhat similar to C<slapo-rwm>
+
+=head1 METHODS
+
+=head2 run
+
+ my $pid = A3C::LDAP::Server->run({ port => 1389, fork => 0 });
+
+=cut
+
+our $pids;
+our $cache;
+
+sub cache {
+ return $cache if $cache;
+ $cache = new A3C::Cache->new({ instance => '', dir => 'ldap' });
+}
+
+sub run {
+ my $self = shift;
+
+ my $args = shift;
+ # default LDAP port
+ my $port = $args->{port} ||= 1389;
+
+ if ( $args->{fork} ) {
+ defined(my $pid = fork()) or die "Can't fork: $!";
+ if ( $pid ) {
+ $pids->{ $port } = $pid;
+ warn "# pids = ",dump( $pids );
+ sleep 1;
+ return $pid;
+ }
+ }
+
+ my $sock = IO::Socket::INET->new(
+ Listen => 5,
+ Proto => 'tcp',
+ Reuse => 1,
+ LocalPort => $port,
+ ) or die "can't listen on port $port: $!\n";
+
+ warn "LDAP server listening on port $port\n";
+
+ my $sel = IO::Select->new($sock) or die "can't select socket: $!\n";
+ my %Handlers;
+ while (my @ready = $sel->can_read) {
+ foreach my $fh (@ready) {
+ if ($fh == $sock) {
+ # let's create a new socket
+ my $psock = $sock->accept;
+ $sel->add($psock);
+ $Handlers{*$psock} = A3C::LDAP::Server->new($psock);
+ } else {
+ my $result = $Handlers{*$fh}->handle;
+ if ($result) {
+ # we have finished with the socket
+ $sel->remove($fh);
+ $fh->close;
+ delete $Handlers{*$fh};
+ }
+ }
+ }
+ }
+}
+
+=head2 stop
+
+ my $stopped_pids = A3C::LDAP::Server->stop;
+
+=cut
+
+sub stop {
+ warn "## stop pids = ",dump( $pids );
+ return unless $pids;
+ my $stopped = 0;
+ foreach my $port ( keys %$pids ) {
+ my $pid = delete($pids->{$port}) or die "no pid?";
+ warn "# Shutdown LDAP server at port $port pid $pid\n";
+ kill(9,$pid) or die "can't kill $pid: $!";
+ waitpid($pid,0) or die "waitpid $pid: $!";
+ $stopped++;
+ }
+ warn "## stopped $stopped processes\n";
+ return $stopped;
+}
+
+use constant RESULT_OK => {
+ 'matchedDN' => '',
+ 'errorMessage' => '',
+ 'resultCode' => LDAP_SUCCESS
+};
+
+# constructor
+sub new {
+ my ($class, $sock) = @_;
+ my $self = $class->SUPER::new($sock);
+ printf "Accepted connection from: %s\n", $sock->peerhost();
+ return $self;
+}
+
+# the bind operation
+sub bind {
+ my ($self,$req) = @_;
+
+ warn "## bind req = ",dump($req);
+
+ defined($req->{authentication}->{simple}) or return {
+ matchedDN => '',
+ errorMessage => '',
+ resultCode => LDAP_STRONG_AUTH_NOT_SUPPORTED,
+ };
+
+ $self->{upstream} ||= A3C::LDAP->new->ldap or return {
+ matchedDN => '',
+ errorMessage => $@,
+ resultCode => LDAP_UNAVAILABLE,
+ };
+
+# warn "## upstream = ",dump( $self->{upstream} );
+# warn "upstream not Net::LDAP but ",ref($self->{upstream}) unless ref($self->{upstream}) eq 'Net::LDAP';
+
+ my $msg;
+
+ # FIXME we would need to unbind because A3C::LDAP binds us automatically, but that doesn't really work
+ #$msg = $self->{upstream}->unbind;
+ #warn "# unbind msg = ",dump( $msg );
+
+ $msg = $self->{upstream}->bind(
+ dn => $req->{name},
+ password => $req->{authentication}->{simple}
+ );
+
+ #warn "# bind msg = ",dump( $msg );
+ if ( $msg->code != LDAP_SUCCESS ) {
+ warn "ERROR: ", $msg->code, ": ", $msg->server_error, "\n";
+ return {
+ matchedDN => '',
+ errorMessage => $msg->server_error,
+ resultCode => $msg->code,
+ };
+ }
+
+ return RESULT_OK;
+}
+
+# the search operation
+sub search {
+ my ($self,$req) = @_;
+
+ warn "## search req = ",dump( $req );
+
+ if ( ! $self->{upstream} ) {
+ warn "search without bind";
+ return {
+ matchedDN => '',
+ errorMessage => 'dude, bind first',
+ resultCode => LDAP_OPERATIONS_ERROR,
+ };
+ }
+
+ my $filter;
+ if (defined $req->{filter}) {
+ # $req->{filter} is a ASN1-decoded tree; luckily, this is exactly the
+ # internal representation Net::LDAP::Filter uses. [FIXME] Eventually
+ # Net::LDAP::Filter should provide a corresponding constructor.
+ bless($req->{filter}, 'Net::LDAP::Filter');
+ $filter = $req->{filter}->as_string;
+# $filter = '(&' . $req->{filter}->as_string
+# . '(objectClass=hrEduPerson)(host=aai.irb.hr))';
+ }
+
+ warn "search upstream for $filter\n";
+
+ my $search = $self->{upstream}->search(
+ base => $req->{baseObject},
+ scope => $req->{scope},
+ deref => $req->{derefAliases},
+ sizelimit => $req->{sizeLimit},
+ timelimit => $req->{timeLimit},
+ typesonly => $req->{typesOnly},
+ filter => $filter,
+ attrs => $req->{attributes},
+ raw => qr/.*/,
+ );
+
+# warn "# search = ",dump( $search );
+
+ if ( $search->code != LDAP_SUCCESS ) {
+ warn "ERROR: ",$search->code,": ",$search->server_error;
+ return {
+ matchedDN => '',
+ errorMessage => $search->server_error,
+ resultCode => $search->code,
+ };
+ };
+
+ my @entries = $search->entries;
+ warn "## got ", $search->count, " entries for $filter\n";
+ foreach my $entry (@entries) {
+# $entry->changetype('add'); # Don't record changes.
+# foreach my $attr ($entry->attributes) {
+# if ($attr =~ /;lang-en$/) {
+# $entry->delete($attr);
+# }
+# }
+ }
+
+ warn "## entries = ",dump( @entries );
+
+ $self->cache->write_cache( \@entries, uri_escape( $filter ));
+
+ return RESULT_OK, @entries;
+}
+
+# the rest of the operations will return an "unwilling to perform"
+
+1;