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, 4 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
#	Content
1	package Net::XMPP2::SimpleConnection;
2	use strict;
3
4	use IO::Socket::INET;
5	use Errno;
6	use Fcntl;
7	use Encode;
8	use Net::SSLeay;
9	use IO::Handle;
10
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	binmode $sock, ":raw";
84
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	$self->{read_buffer} .= decode_utf8 $data;
91	$self->handle_data (\$self->{read_buffer});
92
93	} else {
94	return if $! == Errno::EAGAIN;
95	if (defined $l) {
96	$self->disconnect ("EOF from server '$self->{host}:$self->{port}'");
97	return;
98
99	} else {
100	$self->disconnect ("Error while reading from server '$self->{host}:$port': $!");
101	return;
102	}
103	}
104	});
105	return 1;
106	}
107
108	sub end_sockets {
109	my ($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 $self->{ctx};
117	}
118	close ($self->{socket});
119	delete $self->{socket};
120	}
121
122	sub try_ssl_write {
123	my ($self) = @_;
124
125	my $l = Net::SSLeay::write ($self->{ssl}, $self->{write_buffer});
126
127	if ($l <= 0) {
128	if ($l == 0) {
129	$self->disconnect ("unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
130	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	$self->disconnect (
144	sprintf (
145	"Error while writing from server '$self->{host}:$self->{port}': (%d\|%s\|%s)",
146	$err2, (Net::SSLeay::ERR_error_string $err), "$!")
147	);
148	return;
149	}
150	}
151	} else {
152	$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 $self->{w};
156	}
157	}
158	}
159
160	sub try_ssl_read {
161	my ($self) = @_;
162	my $r = Net::SSLeay::read ($self->{ssl});
163
164	if (defined $r) {
165	if ($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	$self->{read_buffer} .= decode_utf8 ($r);
181	$self->handle_data (\$self->{read_buffer});
182	} else {
183	my $err2 = Net::SSLeay::get_error $self->{ssl}, $r;
184	if ($err2 == 2 \|\| $err2 == 3) {
185	#d# warn "READ RETRY $err2\n";
186	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
194	$self->disconnect (
195	sprintf (
196	"Error while reading from server '$self->{host}:$self->{port}':"
197	."(%d\|%s\|%s)",
198	$err2, (Net::SSLeay::ERR_error_string $err), "$!")
199	);
200	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	$self->{write_buffer} .= encode_utf8 ($data);
211
212	unless ($self->{w}) {
213	$self->{w} =
214	AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
215	if (not $self->{ssl_enabled}) {
216	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	} 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
246	$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	$self->try_ssl_write;
261	});
262	}
263
264	sub enable_ssl {
265	my ($self) = @_;
266
267	$Net::SSLeay::ssl_version = 10; # Insist on TLSv1
268
269	$self->{ssl_enabled} = 1;
270
271	#d# warn "START TLS!\n";
272
273	$self->{r} = undef;
274	$self->{w} = undef;
275
276	$self->{ctx} = Net::SSLeay::CTX_new ();
277
278	# enable SSL_MODE_ENABLE_PARTIAL_WRITE and SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
279	Net::SSLeay::CTX_set_mode($self->{ctx}, 1 \| 2);
280
281	$self->{ssl} = Net::SSLeay::new ($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	$self->make_ssl_read_watcher;
291	}
292
293	sub disconnect {
294	my ($self, $msg) = @_;
295	$self->end_sockets;
296	$self->{disconnect_cb}->($self->{host}, $self->{port}, $msg);
297	}
298
299	1;