Net/XMPP2/SimpleConnection.pm

package Net::XMPP2::SimpleConnection;
use strict;

use IO::Socket::INET;
use Errno;
use Fcntl;
use Encode;
use Net::SSLeay;
use IO::Handle;

BEGIN {
   Net::SSLeay::load_error_strings ();
   Net::SSLeay::SSLeay_add_ssl_algorithms ();
   Net::SSLeay::randomize ();
}

=head1 NAME

Net::XMPP2::SimpleConnection - A low level TCP/TLS connection

=head1 SYNOPSIS

   package foo;
   use Net::XMPP2::SimpleConnection;

   our @ISA = qw/Net::XMPP2::SimpleConnection/;

=head1 DESCRIPTION

This module only implements the basic low level socket and SSL handling stuff.
It is used by L<Net::XMPP2::Connection>.

=cut

sub new {
   my $this = shift;
   my $class = ref($this) || $this;
   my $self = { disconnect_cb => sub {}, @_ };
   bless $self, $class;
   return $self;
}

sub set_block {
   my ($self) = @_;
   my $flags = 0;
   fcntl($self->{socket}, F_GETFL, $flags)
       or die "Couldn't get flags for HANDLE : $!\n";
   $flags &= ~O_NONBLOCK;
   fcntl($self->{socket}, F_SETFL, $flags)
       or die "Couldn't set flags for HANDLE: $!\n";
}

sub set_noblock {
   my ($self) = @_;
   my $flags = 0;
   fcntl($self->{socket}, F_GETFL, $flags)
       or die "Couldn't get flags for HANDLE : $!\n";
   $flags |= O_NONBLOCK;
   fcntl($self->{socket}, F_SETFL, $flags)
       or die "Couldn't set flags for HANDLE: $!\n";
}

sub connect {
   my ($self, $host, $port) = @_;

   $self->{socket}
      and return 1;

   my $sock = IO::Socket::INET->new (
      PeerAddr => $host,
      PeerPort => $port,
      Proto    => 'tcp',
      Blocking => 1
   );
   return undef unless $sock;;

   $self->{socket} = $sock;
   $self->{host}   = $host;
   $self->{port}   = $port;

   $self->set_noblock;

   binmode $sock, ":raw";

   $self->{r} =
      AnyEvent->io (poll => 'r', fh => $sock, cb => sub {
         my $l = sysread $sock, my $data, 1024;

         if ($l) {
            $self->{read_buffer} .= decode_utf8 $data;
            $self->handle_data (\$self->{read_buffer});

         } else {
            return if $! == Errno::EAGAIN;
            if (defined $l) {
               $self->disconnect ("EOF from server '$self->{host}:$self->{port}'");
               return;

            } else {
               $self->disconnect ("Error while reading from server '$self->{host}:$port': $!");
               return;
            }
         }
      });
   return 1;
}

sub end_sockets {
   my ($self) = @_;
   delete $self->{r};
   delete $self->{w};
   if (delete $self->{ssl_enabled}) {
      Net::SSLeay::free ($self->{ssl});
      delete $self->{ssl};
      Net::SSLeay::CTX_free ($self->{ctx});
      delete $self->{ctx};
   }
   close ($self->{socket});
   delete $self->{socket};
}

sub try_ssl_write {
   my ($self) = @_;

   my $l = Net::SSLeay::write ($self->{ssl}, $self->{write_buffer});

   if ($l <= 0) {
      if ($l == 0) {
         $self->disconnect ("unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
         return;

      } else {
         my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
         if ($err2 == 2 || $err2 == 3) {
            delete $self->{w};
            $self->make_ssl_write_watcher ($err2 == 2 ? 'r' : 'w');
            return;
         }

         if ($! != Errno::EAGAIN
             or my $err = Net::SSLeay::ERR_get_error) {

            $self->disconnect (
               sprintf (
                  "Error while writing from server '$self->{host}:$self->{port}': (%d|%s|%s)",
               $err2, (Net::SSLeay::ERR_error_string $err), "$!")
            );
            return;
         }
      }
   } else {
      $self->debug_wrote_data (substr $self->{write_buffer}, 0, $l);
      $self->{write_buffer} = substr $self->{write_buffer}, $l;
      if (length ($self->{write_buffer}) <= 0) {
         delete $self->{w};
      }
   }
}

sub try_ssl_read {
   my ($self) = @_;
   my $r = Net::SSLeay::read ($self->{ssl});

   if (defined $r) {
      if ($r eq '') {
         if (my $err = Net::SSLeay::ERR_get_error) {
            $self->disconnect (
               sprintf (
                  "Error while reading from server '$self->{host}:$self->{port}':"
                  ."(%s|%s)",
                  (Net::SSLeay::ERR_error_string $err), "$!")
            );
            return;
         }
         # is this right? $r = '' => EOF? sucky Net::SSLeay... arg...
         $self->disconnect ("EOF from server '$self->{host}:$self->{port}'.");
         return;
      }

      $self->{read_buffer} .= decode_utf8 ($r);
      $self->handle_data (\$self->{read_buffer});
   } else {
      my $err2 = Net::SSLeay::get_error $self->{ssl}, $r;
      if ($err2 == 2 || $err2 == 3) {
         #d# warn "READ RETRY $err2\n";
         delete $self->{r};
         $self->make_ssl_read_watcher ($err2 == 2 ? 'r' : 'w');
         return;
      }

      if ($! != Errno::EAGAIN
          or my $err = Net::SSLeay::ERR_get_error) {

         $self->disconnect (
            sprintf (
               "Error while reading from server '$self->{host}:$self->{port}':"
               ."(%d|%s|%s)",
               $err2, (Net::SSLeay::ERR_error_string $err), "$!")
         );
         return;
      }
   }
}

sub write_data {
   my ($self, $data) = @_;
   #return unless $self->{r};

   my $cl = $self->{socket};
   $self->{write_buffer} .= encode_utf8 ($data);

   unless ($self->{w}) {
      $self->{w} =
         AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
            if (not $self->{ssl_enabled}) {
               if (my $data = $self->{write_buffer}) {
                  my $len = syswrite $cl, $data;
                  unless ($len) {
                     return if $! == Errno::EAGAIN;
                     if (not defined $len) {
                        warn "error when writing data on $self->{host}:$self->{port}: $!";
                        return;
                     } else {
                        delete $self->{w};
                     }
                  }

                  if ($len == length $self->{write_buffer}) {
                     delete $self->{w};
                  }

                  $self->debug_wrote_data (substr $self->{write_buffer}, 0, $len);
                  $self->{write_buffer} = substr $self->{write_buffer}, $len;
               }
            } else {
               $self->try_ssl_write;
            }
         });
   }
}

sub make_ssl_read_watcher {
   my ($self, $poll) = @_;
   return if $self->{r};

   $poll ||= 'r';
   $self->{r} =
      AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
         $self->try_ssl_read;
      });
}

sub make_ssl_write_watcher {
   my ($self, $poll) = @_;
   return if $self->{w};

   $poll ||= 'w';
   $self->{w} =
      AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
         $self->try_ssl_write;
      });
}

sub enable_ssl {
   my ($self) = @_;

   $Net::SSLeay::ssl_version = 10; # Insist on TLSv1

   $self->{ssl_enabled} = 1;

   #d# warn "START TLS!\n";

   $self->{r} = undef;
   $self->{w} = undef;

   $self->{ctx} = Net::SSLeay::CTX_new ();

   # enable SSL_MODE_ENABLE_PARTIAL_WRITE and SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
   Net::SSLeay::CTX_set_mode($self->{ctx}, 1 | 2);

   $self->{ssl} = Net::SSLeay::new ($self->{ctx});

   Net::SSLeay::set_fd ($self->{ssl}, fileno $self->{socket});
   #d# warn "CONNECT\n";
   Net::SSLeay::connect $self->{ssl};
   #d# warn "CONNECT END\n";
   binmode $self->{socket}, ":bytes";

   $self->{ssl_read_data} = "";
   $self->make_ssl_read_watcher;
}

sub disconnect {
   my ($self, $msg) = @_;
   $self->end_sockets;
   $self->{disconnect_cb}->($self->{host}, $self->{port}, $msg);
}

1;
Revision:	1.7
Committed:	Mon Jul 2 13:15:00 2007 UTC (19 years, 2 months ago) by elmex
Branch:	MAIN
Changes since 1.6:	+18 -1 lines
Log Message:	added some error handling for EOF ... err... disconnects from SSL
#	User	Rev	Content
1	elmex	1.1	package Net::XMPP2::SimpleConnection;
2	elmex	1.7	use strict;
3
4	elmex	1.1	use IO::Socket::INET;
5			use Errno;
6			use Fcntl;
7			use Encode;
8			use Net::SSLeay;
9	elmex	1.5	use IO::Handle;
10	elmex	1.1
11			BEGIN {
12			Net::SSLeay::load_error_strings ();
13			Net::SSLeay::SSLeay_add_ssl_algorithms ();
14			Net::SSLeay::randomize ();
15			}
16
17			=head1 NAME
18
19			Net::XMPP2::SimpleConnection - A low level TCP/TLS connection
20
21			=head1 SYNOPSIS
22
23			package foo;
24			use Net::XMPP2::SimpleConnection;
25
26			our @ISA = qw/Net::XMPP2::SimpleConnection/;
27
28			=head1 DESCRIPTION
29
30			This module only implements the basic low level socket and SSL handling stuff.
31			It is used by L<Net::XMPP2::Connection>.
32
33			=cut
34
35			sub new {
36			my $this = shift;
37			my $class = ref($this) \|\| $this;
38			my $self = { disconnect_cb => sub {}, @_ };
39			bless $self, $class;
40			return $self;
41			}
42
43			sub set_block {
44			my ($self) = @_;
45			my $flags = 0;
46			fcntl($self->{socket}, F_GETFL, $flags)
47			or die "Couldn't get flags for HANDLE : $!\n";
48			$flags &= ~O_NONBLOCK;
49			fcntl($self->{socket}, F_SETFL, $flags)
50			or die "Couldn't set flags for HANDLE: $!\n";
51			}
52
53			sub set_noblock {
54			my ($self) = @_;
55			my $flags = 0;
56			fcntl($self->{socket}, F_GETFL, $flags)
57			or die "Couldn't get flags for HANDLE : $!\n";
58			$flags \|= O_NONBLOCK;
59			fcntl($self->{socket}, F_SETFL, $flags)
60			or die "Couldn't set flags for HANDLE: $!\n";
61			}
62
63			sub connect {
64			my ($self, $host, $port) = @_;
65
66			$self->{socket}
67			and return 1;
68
69			my $sock = IO::Socket::INET->new (
70			PeerAddr => $host,
71			PeerPort => $port,
72			Proto => 'tcp',
73			Blocking => 1
74			);
75			return undef unless $sock;;
76
77			$self->{socket} = $sock;
78			$self->{host} = $host;
79			$self->{port} = $port;
80
81			$self->set_noblock;
82
83	elmex	1.4	binmode $sock, ":raw";
84	elmex	1.1
85			$self->{r} =
86			AnyEvent->io (poll => 'r', fh => $sock, cb => sub {
87			my $l = sysread $sock, my $data, 1024;
88
89			if ($l) {
90	elmex	1.4	$self->{read_buffer} .= decode_utf8 $data;
91	elmex	1.1	$self->handle_data (\$self->{read_buffer});
92
93			} else {
94			return if $! == Errno::EAGAIN;
95			if (defined $l) {
96	elmex	1.5	$self->disconnect ("EOF from server '$self->{host}:$self->{port}'");
97	elmex	1.1	return;
98
99			} else {
100	elmex	1.5	$self->disconnect ("Error while reading from server '$self->{host}:$port': $!");
101	elmex	1.1	return;
102			}
103			}
104			});
105			return 1;
106			}
107
108			sub end_sockets {
109			my ($self) = @_;
110			delete $self->{r};
111			delete $self->{w};
112			if (delete $self->{ssl_enabled}) {
113			Net::SSLeay::free ($self->{ssl});
114			delete $self->{ssl};
115			Net::SSLeay::CTX_free ($self->{ctx});
116			delete $self->{ctx};
117			}
118	elmex	1.5	close ($self->{socket});
119			delete $self->{socket};
120	elmex	1.1	}
121
122			sub try_ssl_write {
123			my ($self) = @_;
124
125	elmex	1.2	my $l = Net::SSLeay::write ($self->{ssl}, $self->{write_buffer});
126	elmex	1.1
127			if ($l <= 0) {
128			if ($l == 0) {
129	elmex	1.5	$self->disconnect ("unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
130	elmex	1.1	return;
131
132			} else {
133			my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
134			if ($err2 == 2 \|\| $err2 == 3) {
135			delete $self->{w};
136			$self->make_ssl_write_watcher ($err2 == 2 ? 'r' : 'w');
137			return;
138			}
139
140			if ($! != Errno::EAGAIN
141			or my $err = Net::SSLeay::ERR_get_error) {
142
143	elmex	1.5	$self->disconnect (
144	elmex	1.1	sprintf (
145			"Error while writing from server '$self->{host}:$self->{port}': (%d\|%s\|%s)",
146			$err2, (Net::SSLeay::ERR_error_string $err), "$!")
147			);
148			return;
149			}
150			}
151			} else {
152	elmex	1.2	$self->debug_wrote_data (substr $self->{write_buffer}, 0, $l);
153			$self->{write_buffer} = substr $self->{write_buffer}, $l;
154			if (length ($self->{write_buffer}) <= 0) {
155			delete $self->{w};
156			}
157	elmex	1.1	}
158			}
159
160			sub try_ssl_read {
161			my ($self) = @_;
162	elmex	1.2	my $r = Net::SSLeay::read ($self->{ssl});
163
164			if (defined $r) {
165	elmex	1.7	if ($r eq '') {
166			if (my $err = Net::SSLeay::ERR_get_error) {
167			$self->disconnect (
168			sprintf (
169			"Error while reading from server '$self->{host}:$self->{port}':"
170			."(%s\|%s)",
171			(Net::SSLeay::ERR_error_string $err), "$!")
172			);
173			return;
174			}
175			# is this right? $r = '' => EOF? sucky Net::SSLeay... arg...
176			$self->disconnect ("EOF from server '$self->{host}:$self->{port}'.");
177			return;
178			}
179
180	elmex	1.2	$self->{read_buffer} .= decode_utf8 ($r);
181			$self->handle_data (\$self->{read_buffer});
182			} else {
183	elmex	1.7	my $err2 = Net::SSLeay::get_error $self->{ssl}, $r;
184	elmex	1.2	if ($err2 == 2 \|\| $err2 == 3) {
185	elmex	1.6	#d# warn "READ RETRY $err2\n";
186	elmex	1.2	delete $self->{r};
187			$self->make_ssl_read_watcher ($err2 == 2 ? 'r' : 'w');
188			return;
189			}
190
191			if ($! != Errno::EAGAIN
192			or my $err = Net::SSLeay::ERR_get_error) {
193	elmex	1.1
194	elmex	1.5	$self->disconnect (
195	elmex	1.2	sprintf (
196			"Error while reading from server '$self->{host}:$self->{port}':"
197			."(%d\|%s\|%s)",
198			$err2, (Net::SSLeay::ERR_error_string $err), "$!")
199			);
200	elmex	1.1	return;
201			}
202			}
203			}
204
205			sub write_data {
206			my ($self, $data) = @_;
207			#return unless $self->{r};
208
209			my $cl = $self->{socket};
210	elmex	1.4	$self->{write_buffer} .= encode_utf8 ($data);
211	elmex	1.1
212			unless ($self->{w}) {
213	elmex	1.2	$self->{w} =
214			AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
215			if (not $self->{ssl_enabled}) {
216	elmex	1.1	if (my $data = $self->{write_buffer}) {
217			my $len = syswrite $cl, $data;
218			unless ($len) {
219			return if $! == Errno::EAGAIN;
220			if (not defined $len) {
221			warn "error when writing data on $self->{host}:$self->{port}: $!";
222			return;
223			} else {
224			delete $self->{w};
225			}
226			}
227
228			if ($len == length $self->{write_buffer}) {
229			delete $self->{w};
230			}
231
232			$self->debug_wrote_data (substr $self->{write_buffer}, 0, $len);
233			$self->{write_buffer} = substr $self->{write_buffer}, $len;
234			}
235	elmex	1.2	} else {
236			$self->try_ssl_write;
237			}
238			});
239			}
240			}
241
242			sub make_ssl_read_watcher {
243			my ($self, $poll) = @_;
244			return if $self->{r};
245	elmex	1.1
246	elmex	1.2	$poll \|\|= 'r';
247			$self->{r} =
248			AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
249			$self->try_ssl_read;
250			});
251			}
252
253			sub make_ssl_write_watcher {
254			my ($self, $poll) = @_;
255			return if $self->{w};
256
257			$poll \|\|= 'w';
258			$self->{w} =
259			AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
260			$self->try_ssl_write;
261			});
262	elmex	1.1	}
263
264			sub enable_ssl {
265			my ($self) = @_;
266
267			$Net::SSLeay::ssl_version = 10; # Insist on TLSv1
268
269			$self->{ssl_enabled} = 1;
270
271	elmex	1.3	#d# warn "START TLS!\n";
272	elmex	1.1
273			$self->{r} = undef;
274			$self->{w} = undef;
275
276			$self->{ctx} = Net::SSLeay::CTX_new ();
277	elmex	1.3
278	elmex	1.2	# enable SSL_MODE_ENABLE_PARTIAL_WRITE and SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
279			Net::SSLeay::CTX_set_mode($self->{ctx}, 1 \| 2);
280	elmex	1.3
281	elmex	1.1	$self->{ssl} = Net::SSLeay::new ($self->{ctx});
282
283			Net::SSLeay::set_fd ($self->{ssl}, fileno $self->{socket});
284			#d# warn "CONNECT\n";
285			Net::SSLeay::connect $self->{ssl};
286			#d# warn "CONNECT END\n";
287			binmode $self->{socket}, ":bytes";
288
289			$self->{ssl_read_data} = "";
290			$self->make_ssl_read_watcher;
291			}
292
293	elmex	1.5	sub disconnect {
294			my ($self, $msg) = @_;
295			$self->end_sockets;
296			$self->{disconnect_cb}->($self->{host}, $self->{port}, $msg);
297			}
298
299	elmex	1.1	1;