Net/XMPP2/SimpleConnection.pm

package Net::XMPP2::SimpleConnection;
use IO::Socket::INET;
use Errno;
use Fcntl;
use Encode;
use Net::SSLeay;

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, ":utf8";

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

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

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

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

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

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

   print "er: ".Net::SSLeay::BIO_should_retry (Net::SSLeay::get_rbio ($self->{ssl}));
   print " ew: ".Net::SSLeay::BIO_should_retry (Net::SSLeay::get_wbio ($self->{ssl}));
   print " rr: ".Net::SSLeay::BIO_should_read (Net::SSLeay::get_rbio ($self->{ssl}));
   print " rw: ".Net::SSLeay::BIO_should_read (Net::SSLeay::get_wbio ($self->{ssl}));
   print " wr: ".Net::SSLeay::BIO_should_write (Net::SSLeay::get_rbio ($self->{ssl}));
   print " ww: ".Net::SSLeay::BIO_should_write (Net::SSLeay::get_wbio ($self->{ssl}))."\n";

   my $e = Net::SSLeay::BIO_should_retry (Net::SSLeay::get_wbio ($self->{ssl}))
           | Net::SSLeay::BIO_should_retry (Net::SSLeay::get_wbio ($self->{ssl}));
   my $w = Net::SSLeay::BIO_should_read (Net::SSLeay::get_wbio ($self->{ssl}))
           | Net::SSLeay::BIO_should_write (Net::SSLeay::get_wbio ($self->{ssl}));
   my $r = Net::SSLeay::BIO_should_read (Net::SSLeay::get_rbio ($self->{ssl}))
           | Net::SSLeay::BIO_should_write (Net::SSLeay::get_rbio ($self->{ssl}));

   print "TEST:$e $w $r\n";
 #  delete $self->{r};
 #  delete $self->{w};
 #  if ($w) { $self->make_ssl_write_watcher }
 #  if ($r) { $self->make_ssl_read_watcher }
 #  unless ($e) {
 #     $self->make_ssl_read_watcher;
 #     $self->make_ssl_write_watcher;
 #  }
}

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

   unless ($self->{ssl_out_buffer}) { # refill buffer
      $self->{ssl_out_buffer} = $self->{write_buffer};
      $self->{write_buffer} = "";
   }

   unless ($self->{ssl_out_buffer}) {
      delete $self->{w};
      return;
   }

   my $l = Net::SSLeay::write_nb ($self->{ssl},
              $self->{ssl_out_buffer}, length ($self->{ssl_out_buffer}));

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

      } else {
         my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
         #d# warn "write err[$err2]\n"; $self->dumpbio;
         if ($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) {

            $self->{disconnect_cb}->($self->{host}, $self->{port},
               sprintf (
                  "Error while writing from server '$self->{host}:$self->{port}': (%d|%s|%s)",
               $err2, (Net::SSLeay::ERR_error_string $err), "$!")
            );
            $self->end_sockets;
            return;
         }
      }
      $self->make_ssl_read_watcher;
      return;
   } else {
      $self->debug_wrote_data (substr $self->{ssl_out_buffer}, 0, $l);
      $self->{ssl_out_buffer} = substr $self->{ssl_out_buffer}, $l;
   }
}

sub try_ssl_read {
   my ($self) = @_;
   my $l = Net::SSLeay::read_nb ($self->{ssl}, $self->{ssl_read_data});

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

      } else {
         my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
         #d# warn "read err[$err2]\n"; $self->dumpbio;
         if ($err2 == 2 || $err2 == 3) {
            delete $self->{r};
            $self->make_ssl_read_watcher ($err2 == 2 ? 'r' : 'w');
            return;
         }

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

            $self->{disconnect_cb}->($self->{host}, $self->{port},
               sprintf (
                  "Error while reading from server '$self->{host}:$self->{port}':"
                  ."(%d|%s|%s)",
                  $err2, (Net::SSLeay::ERR_error_string $err), "$!")
            );
            $self->end_sockets;
            return;
         }
      }
   } else {
      $self->{read_buffer} .= decode_utf8 ($self->{ssl_read_data});
      $self->handle_data (\$self->{read_buffer});
      $self->{ssl_read_data} = "";
   }

}

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

   $poll ||= 'r';
   $self->{r} =
      AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
         #d# warn "read cb [$poll]\n";
         $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 => $self->{socket}, cb => sub {
         #warn "write cb [$poll]\n";
         $self->try_ssl_write;
         1;
      });
}

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

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

   unless ($self->{w}) {
      if (not $self->{ssl_enabled}) {
         $self->{w} =
            AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
               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 {
         unless ($self->{ssl_out_buffer}) {
            $self->{ssl_out_buffer} = encode_utf8 ($self->{write_buffer});
            $self->{write_buffer} = "";
            $self->make_ssl_write_watcher;
         }
      }
   }
}

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

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

   $self->{ssl_enabled} = 1;

   warn "START TLS!\n";

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

   $self->{ctx} = Net::SSLeay::CTX_new ();
   Net::SSLeay::CTX_set_mode($self->{ctx}, 1);
   $self->{ssl} = Net::SSLeay::new ($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;
}

1;
Revision:	1.1
Committed:	Sat Mar 17 12:27:57 2007 UTC (19 years, 6 months ago) by elmex
Branch:	MAIN
Log Message:	some minor cleanups.
#	User	Rev	Content
1	elmex	1.1	package Net::XMPP2::SimpleConnection;
2			use IO::Socket::INET;
3			use Errno;
4			use Fcntl;
5			use Encode;
6			use Net::SSLeay;
7
8			BEGIN {
9			Net::SSLeay::load_error_strings ();
10			Net::SSLeay::SSLeay_add_ssl_algorithms ();
11			Net::SSLeay::randomize ();
12			}
13
14			=head1 NAME
15
16			Net::XMPP2::SimpleConnection - A low level TCP/TLS connection
17
18			=head1 SYNOPSIS
19
20			package foo;
21			use Net::XMPP2::SimpleConnection;
22
23			our @ISA = qw/Net::XMPP2::SimpleConnection/;
24
25			=head1 DESCRIPTION
26
27			This module only implements the basic low level socket and SSL handling stuff.
28			It is used by L<Net::XMPP2::Connection>.
29
30			=cut
31
32			sub new {
33			my $this = shift;
34			my $class = ref($this) \|\| $this;
35			my $self = { disconnect_cb => sub {}, @_ };
36			bless $self, $class;
37			return $self;
38			}
39
40			sub set_block {
41			my ($self) = @_;
42			my $flags = 0;
43			fcntl($self->{socket}, F_GETFL, $flags)
44			or die "Couldn't get flags for HANDLE : $!\n";
45			$flags &= ~O_NONBLOCK;
46			fcntl($self->{socket}, F_SETFL, $flags)
47			or die "Couldn't set flags for HANDLE: $!\n";
48			}
49
50			sub set_noblock {
51			my ($self) = @_;
52			my $flags = 0;
53			fcntl($self->{socket}, F_GETFL, $flags)
54			or die "Couldn't get flags for HANDLE : $!\n";
55			$flags \|= O_NONBLOCK;
56			fcntl($self->{socket}, F_SETFL, $flags)
57			or die "Couldn't set flags for HANDLE: $!\n";
58			}
59
60			sub connect {
61			my ($self, $host, $port) = @_;
62
63			$self->{socket}
64			and return 1;
65
66			my $sock = IO::Socket::INET->new (
67			PeerAddr => $host,
68			PeerPort => $port,
69			Proto => 'tcp',
70			Blocking => 1
71			);
72			return undef unless $sock;;
73
74			$self->{socket} = $sock;
75			$self->{host} = $host;
76			$self->{port} = $port;
77
78			$self->set_noblock;
79
80			binmode $sock, ":utf8";
81
82			$self->{r} =
83			AnyEvent->io (poll => 'r', fh => $sock, cb => sub {
84			my $l = sysread $sock, my $data, 1024;
85
86			if ($l) {
87			$self->{read_buffer} .= $data;
88			$self->handle_data (\$self->{read_buffer});
89
90			} else {
91			return if $! == Errno::EAGAIN;
92			if (defined $l) {
93			$self->{disconnect_cb}->($self->{host}, $self->{port}, "EOF from server '$self->{host}:$self->{port}'");
94			$self->end_sockets;
95			return;
96
97			} else {
98			$self->{disconnect_cb}->($self->{host}, $self->{port}, "Error while reading from server '$self->{host}:$port': $!");
99			$self->end_sockets;
100			return;
101			}
102			}
103			});
104			return 1;
105			}
106
107			sub end_sockets {
108			my ($self) = @_;
109			delete $self->{r};
110			delete $self->{w};
111			delete $self->{socket};
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 $self->{ctx};
117			}
118			}
119
120			sub dumpbio {
121			my ($self) = @_;
122
123			print "er: ".Net::SSLeay::BIO_should_retry (Net::SSLeay::get_rbio ($self->{ssl}));
124			print " ew: ".Net::SSLeay::BIO_should_retry (Net::SSLeay::get_wbio ($self->{ssl}));
125			print " rr: ".Net::SSLeay::BIO_should_read (Net::SSLeay::get_rbio ($self->{ssl}));
126			print " rw: ".Net::SSLeay::BIO_should_read (Net::SSLeay::get_wbio ($self->{ssl}));
127			print " wr: ".Net::SSLeay::BIO_should_write (Net::SSLeay::get_rbio ($self->{ssl}));
128			print " ww: ".Net::SSLeay::BIO_should_write (Net::SSLeay::get_wbio ($self->{ssl}))."\n";
129
130			my $e = Net::SSLeay::BIO_should_retry (Net::SSLeay::get_wbio ($self->{ssl}))
131			\| Net::SSLeay::BIO_should_retry (Net::SSLeay::get_wbio ($self->{ssl}));
132			my $w = Net::SSLeay::BIO_should_read (Net::SSLeay::get_wbio ($self->{ssl}))
133			\| Net::SSLeay::BIO_should_write (Net::SSLeay::get_wbio ($self->{ssl}));
134			my $r = Net::SSLeay::BIO_should_read (Net::SSLeay::get_rbio ($self->{ssl}))
135			\| Net::SSLeay::BIO_should_write (Net::SSLeay::get_rbio ($self->{ssl}));
136
137			print "TEST:$e $w $r\n";
138			# delete $self->{r};
139			# delete $self->{w};
140			# if ($w) { $self->make_ssl_write_watcher }
141			# if ($r) { $self->make_ssl_read_watcher }
142			# unless ($e) {
143			# $self->make_ssl_read_watcher;
144			# $self->make_ssl_write_watcher;
145			# }
146			}
147
148			sub try_ssl_write {
149			my ($self) = @_;
150
151			unless ($self->{ssl_out_buffer}) { # refill buffer
152			$self->{ssl_out_buffer} = $self->{write_buffer};
153			$self->{write_buffer} = "";
154			}
155
156			unless ($self->{ssl_out_buffer}) {
157			delete $self->{w};
158			return;
159			}
160
161			my $l = Net::SSLeay::write_nb ($self->{ssl},
162			$self->{ssl_out_buffer}, length ($self->{ssl_out_buffer}));
163
164			if ($l <= 0) {
165			if ($l == 0) {
166			$self->{disconnect_cb}->($self->{host}, $self->{port},
167			"unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
168			$self->end_sockets;
169			return;
170
171			} else {
172			my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
173			#d# warn "write err[$err2]\n"; $self->dumpbio;
174			if ($err2 == 2 \|\| $err2 == 3) {
175			delete $self->{w};
176			$self->make_ssl_write_watcher ($err2 == 2 ? 'r' : 'w');
177			return;
178			}
179
180			if ($! != Errno::EAGAIN
181			or my $err = Net::SSLeay::ERR_get_error) {
182
183			$self->{disconnect_cb}->($self->{host}, $self->{port},
184			sprintf (
185			"Error while writing from server '$self->{host}:$self->{port}': (%d\|%s\|%s)",
186			$err2, (Net::SSLeay::ERR_error_string $err), "$!")
187			);
188			$self->end_sockets;
189			return;
190			}
191			}
192			$self->make_ssl_read_watcher;
193			return;
194			} else {
195			$self->debug_wrote_data (substr $self->{ssl_out_buffer}, 0, $l);
196			$self->{ssl_out_buffer} = substr $self->{ssl_out_buffer}, $l;
197			}
198			}
199
200			sub try_ssl_read {
201			my ($self) = @_;
202			my $l = Net::SSLeay::read_nb ($self->{ssl}, $self->{ssl_read_data});
203
204			if ($l <= 0) {
205			if ($l == 0) {
206			$self->{disconnect_cb}->($self->{host}, $self->{port},
207			"unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
208			$self->end_sockets;
209			return;
210
211			} else {
212			my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
213			#d# warn "read err[$err2]\n"; $self->dumpbio;
214			if ($err2 == 2 \|\| $err2 == 3) {
215			delete $self->{r};
216			$self->make_ssl_read_watcher ($err2 == 2 ? 'r' : 'w');
217			return;
218			}
219
220			if ($! != Errno::EAGAIN
221			or my $err = Net::SSLeay::ERR_get_error) {
222
223			$self->{disconnect_cb}->($self->{host}, $self->{port},
224			sprintf (
225			"Error while reading from server '$self->{host}:$self->{port}':"
226			."(%d\|%s\|%s)",
227			$err2, (Net::SSLeay::ERR_error_string $err), "$!")
228			);
229			$self->end_sockets;
230			return;
231			}
232			}
233			} else {
234			$self->{read_buffer} .= decode_utf8 ($self->{ssl_read_data});
235			$self->handle_data (\$self->{read_buffer});
236			$self->{ssl_read_data} = "";
237			}
238
239			}
240
241			sub make_ssl_read_watcher {
242			my ($self, $poll) = @_;
243			return if $self->{r};
244
245			$poll \|\|= 'r';
246			$self->{r} =
247			AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
248			#d# warn "read cb [$poll]\n";
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 => $self->{socket}, cb => sub {
260			#warn "write cb [$poll]\n";
261			$self->try_ssl_write;
262			1;
263			});
264			}
265
266			sub write_data {
267			my ($self, $data) = @_;
268			#return unless $self->{r};
269
270			my $cl = $self->{socket};
271			$self->{write_buffer} .= $data;
272
273			unless ($self->{w}) {
274			if (not $self->{ssl_enabled}) {
275			$self->{w} =
276			AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
277			if (my $data = $self->{write_buffer}) {
278			my $len = syswrite $cl, $data;
279			unless ($len) {
280			return if $! == Errno::EAGAIN;
281			if (not defined $len) {
282			warn "error when writing data on $self->{host}:$self->{port}: $!";
283			return;
284			} else {
285			delete $self->{w};
286			}
287			}
288
289			if ($len == length $self->{write_buffer}) {
290			delete $self->{w};
291			}
292
293			$self->debug_wrote_data (substr $self->{write_buffer}, 0, $len);
294			$self->{write_buffer} = substr $self->{write_buffer}, $len;
295			}
296			});
297
298			} else {
299			unless ($self->{ssl_out_buffer}) {
300			$self->{ssl_out_buffer} = encode_utf8 ($self->{write_buffer});
301			$self->{write_buffer} = "";
302			$self->make_ssl_write_watcher;
303			}
304			}
305			}
306			}
307
308			sub enable_ssl {
309			my ($self) = @_;
310
311			$Net::SSLeay::ssl_version = 10; # Insist on TLSv1
312
313			$self->{ssl_enabled} = 1;
314
315			warn "START TLS!\n";
316
317			$self->{r} = undef;
318			$self->{w} = undef;
319
320			$self->{ctx} = Net::SSLeay::CTX_new ();
321			Net::SSLeay::CTX_set_mode($self->{ctx}, 1);
322			$self->{ssl} = Net::SSLeay::new ($self->{ctx});
323
324			Net::SSLeay::set_fd ($self->{ssl}, fileno $self->{socket});
325			#d# warn "CONNECT\n";
326			Net::SSLeay::connect $self->{ssl};
327			#d# warn "CONNECT END\n";
328			binmode $self->{socket}, ":bytes";
329
330			$self->{ssl_read_data} = "";
331
332			$self->make_ssl_read_watcher;
333			}
334
335			1;