remove cache usage
[virtual-ldap] / lib / LDAP / Virtual.pm
1 package LDAP::Virtual;
2
3 use strict;
4 use warnings;
5
6 use Net::LDAP::Constant qw(
7         LDAP_SUCCESS
8         LDAP_STRONG_AUTH_NOT_SUPPORTED
9         LDAP_UNAVAILABLE
10         LDAP_OPERATIONS_ERROR
11 );
12 use Net::LDAP::Server;
13 use Net::LDAP::Filter;
14 use base qw(Net::LDAP::Server);
15 use fields qw(upstream);
16
17 use Net::LDAP;
18
19 use URI::Escape;        # uri_escape
20 use IO::Socket::INET;
21 use IO::Select;
22
23 use Data::Dump qw/dump/;
24
25 =head1 NAME
26
27 LDAP::Virtual
28
29 =cut
30
31 =head1 DESCRIPTION
32
33 Provide LDAP server functionality somewhat similar to C<slapo-rwm>
34
35 =head1 METHODS
36
37 =head2 run
38
39   my $pid = LDAP::Virtual->run({ port => 1389, fork => 0 });
40
41 =cut
42
43 our $pids;
44 our $cache;
45
46 sub cache {
47         return $cache;
48 }
49
50 sub run {
51         my $self = shift;
52
53         my $args = shift;
54         # default LDAP port
55         my $port = $args->{port} ||= 1389;
56
57         if ( $args->{fork} ) {
58                 defined(my $pid = fork()) or die "Can't fork: $!";
59                 if ( $pid ) {
60                         $pids->{ $port } = $pid;
61                         warn "# pids = ",dump( $pids );
62                         sleep 1;
63                         return $pid;
64                 }
65         }
66
67         my $sock = IO::Socket::INET->new(
68                 Listen => 5,
69                 Proto => 'tcp',
70                 Reuse => 1,
71                 LocalPort => $port,
72         ) or die "can't listen on port $port: $!\n";
73
74         warn "LDAP server listening on port $port\n";
75
76         my $sel = IO::Select->new($sock) or die "can't select socket: $!\n";
77         my %Handlers;
78         while (my @ready = $sel->can_read) {
79                 foreach my $fh (@ready) {
80                         if ($fh == $sock) {
81                                 # let's create a new socket
82                                 my $psock = $sock->accept;
83                                 $sel->add($psock);
84                                 $Handlers{*$psock} = LDAP::Virtual->new($psock);
85                         } else {
86                                 my $result = $Handlers{*$fh}->handle;
87                                 if ($result) {
88                                         # we have finished with the socket
89                                         $sel->remove($fh);
90                                         $fh->close;
91                                         delete $Handlers{*$fh};
92                                 }
93                         }
94                 }
95         }
96 }
97
98 =head2 stop
99
100   my $stopped_pids = LDAP::Virtual->stop;
101
102 =cut
103
104 sub stop {
105         warn "## stop pids = ",dump( $pids );
106         return unless $pids;
107         my $stopped = 0;
108         foreach my $port ( keys %$pids ) {
109                 my $pid = delete($pids->{$port}) or die "no pid?";
110                 warn "# Shutdown LDAP server at port $port pid $pid\n";
111                 kill(9,$pid) or die "can't kill $pid: $!";
112                 waitpid($pid,0) or die "waitpid $pid: $!";
113                 $stopped++;
114         }
115         warn "## stopped $stopped processes\n";
116         return $stopped;
117 }
118
119 use constant RESULT_OK => {
120         'matchedDN' => '',
121         'errorMessage' => '',
122         'resultCode' => LDAP_SUCCESS
123 };
124
125 # constructor
126 sub new {
127         my ($class, $sock) = @_;
128         my $self = $class->SUPER::new($sock);
129         printf "Accepted connection from: %s\n", $sock->peerhost();
130         return $self;
131 }
132
133 # the bind operation
134 sub bind {
135         my ($self,$req) = @_;
136
137         warn "## bind req = ",dump($req);
138
139         defined($req->{authentication}->{simple}) or return {
140                 matchedDN => '',
141                 errorMessage => '',
142                 resultCode => LDAP_STRONG_AUTH_NOT_SUPPORTED,
143         };
144
145         $self->{upstream} ||= Net::LDAP->new( 'ldaps://ldap.ffzg.hr/' ) or return {
146                 matchedDN => '',
147                 errorMessage => $@,
148                 resultCode => LDAP_UNAVAILABLE,
149         };
150
151         warn "## upstream = ",dump( $self->{upstream} );
152         warn "upstream not Net::LDAP but ",ref($self->{upstream}) unless ref($self->{upstream}) eq 'Net::LDAP';
153
154         my $msg;
155
156         # FIXME we would need to unbind because VLDAP binds us automatically, but that doesn't really work
157         #$msg = $self->{upstream}->unbind;
158         #warn "# unbind msg = ",dump( $msg );
159
160         my $bind;
161         $bind->{dn} = $req->{name} if $req->{name};
162         $bind->{password} = $req->{authentication}->{simple} if $req->{authentication}->{simple};
163         warn "# bind ",dump( $bind );
164         $msg = $self->{upstream}->bind( %$bind );
165
166         #warn "# bind msg = ",dump( $msg );
167         if ( $msg->code != LDAP_SUCCESS ) {
168                 warn "ERROR: ", $msg->code, ": ", $msg->server_error, "\n";
169                 return {
170                         matchedDN => '',
171                         errorMessage => $msg->server_error,
172                         resultCode => $msg->code,
173                 };
174         }
175
176         return RESULT_OK;
177 }
178
179 # the search operation
180 sub search {
181         my ($self,$req) = @_;
182
183         warn "## search req = ",dump( $req );
184
185         if ( ! $self->{upstream} ) {
186                 warn "search without bind";
187                 return {
188                         matchedDN => '',
189                         errorMessage => 'dude, bind first',
190                         resultCode => LDAP_OPERATIONS_ERROR,
191                 };
192         }
193
194         my $filter;
195         if (defined $req->{filter}) {
196                 # $req->{filter} is a ASN1-decoded tree; luckily, this is exactly the
197                 # internal representation Net::LDAP::Filter uses.  [FIXME] Eventually
198                 # Net::LDAP::Filter should provide a corresponding constructor.
199                 bless($req->{filter}, 'Net::LDAP::Filter');
200                 $filter = $req->{filter}->as_string;
201 #               $filter = '(&' . $req->{filter}->as_string
202 #                                          . '(objectClass=hrEduPerson)(host=aai.irb.hr))';
203         }
204
205         warn "search upstream for $filter\n";
206
207         my $search = $self->{upstream}->search(
208                 base => $req->{baseObject},
209                 scope => $req->{scope},
210                 deref => $req->{derefAliases},
211                 sizelimit => $req->{sizeLimit},
212                 timelimit => $req->{timeLimit},
213                 typesonly => $req->{typesOnly},
214                 filter => $filter,
215                 attrs => $req->{attributes},
216                 raw => qr/.*/,
217         );
218
219 #       warn "# search = ",dump( $search );
220
221         if ( $search->code != LDAP_SUCCESS ) {
222                 warn "ERROR: ",$search->code,": ",$search->server_error;
223                 return {
224                         matchedDN => '',
225                         errorMessage => $search->server_error,
226                         resultCode => $search->code,
227                 };
228         };
229
230         my @entries = $search->entries;
231         warn "## got ", $search->count, " entries for $filter\n";
232         foreach my $entry (@entries) {
233 #               $entry->changetype('add');  # Don't record changes.
234 #               foreach my $attr ($entry->attributes) {
235 #                       if ($attr =~ /;lang-en$/) { 
236 #                               $entry->delete($attr);
237 #                       }
238 #               }
239         }
240
241         warn "## entries = ",dump( @entries );
242
243 #       $self->cache->write_cache( \@entries, uri_escape( $filter ));
244
245         return RESULT_OK, @entries;
246 }
247
248 # the rest of the operations will return an "unwilling to perform"
249
250 1;