Net/XMPP2/SimpleConnection.pm

package Net::XMPP2::SimpleConnection;
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) {
      $self->{read_buffer} .= decode_utf8 ($r);
      $self->handle_data (\$self->{read_buffer});
   } else {
      my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
      if ($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:	1.6
Committed:	Mon Jun 25 07:56:52 2007 UTC (19 years, 3 months ago) by elmex
Branch:	MAIN
Changes since 1.5:	+1 -1 lines
Log Message:	sime fixes and changes
#	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	elmex	1.5	use IO::Handle;
8	elmex	1.1
9			BEGIN {
10			Net::SSLeay::load_error_strings ();
11			Net::SSLeay::SSLeay_add_ssl_algorithms ();
12			Net::SSLeay::randomize ();
13			}
14
15			=head1 NAME
16
17			Net::XMPP2::SimpleConnection - A low level TCP/TLS connection
18
19			=head1 SYNOPSIS
20
21			package foo;
22			use Net::XMPP2::SimpleConnection;
23
24			our @ISA = qw/Net::XMPP2::SimpleConnection/;
25
26			=head1 DESCRIPTION
27
28			This module only implements the basic low level socket and SSL handling stuff.
29			It is used by L<Net::XMPP2::Connection>.
30
31			=cut
32
33			sub new {
34			my $this = shift;
35			my $class = ref($this) \|\| $this;
36			my $self = { disconnect_cb => sub {}, @_ };
37			bless $self, $class;
38			return $self;
39			}
40
41			sub set_block {
42			my ($self) = @_;
43			my $flags = 0;
44			fcntl($self->{socket}, F_GETFL, $flags)
45			or die "Couldn't get flags for HANDLE : $!\n";
46			$flags &= ~O_NONBLOCK;
47			fcntl($self->{socket}, F_SETFL, $flags)
48			or die "Couldn't set flags for HANDLE: $!\n";
49			}
50
51			sub set_noblock {
52			my ($self) = @_;
53			my $flags = 0;
54			fcntl($self->{socket}, F_GETFL, $flags)
55			or die "Couldn't get flags for HANDLE : $!\n";
56			$flags \|= O_NONBLOCK;
57			fcntl($self->{socket}, F_SETFL, $flags)
58			or die "Couldn't set flags for HANDLE: $!\n";
59			}
60
61			sub connect {
62			my ($self, $host, $port) = @_;
63
64			$self->{socket}
65			and return 1;
66
67			my $sock = IO::Socket::INET->new (
68			PeerAddr => $host,
69			PeerPort => $port,
70			Proto => 'tcp',
71			Blocking => 1
72			);
73			return undef unless $sock;;
74
75			$self->{socket} = $sock;
76			$self->{host} = $host;
77			$self->{port} = $port;
78
79			$self->set_noblock;
80
81	elmex	1.4	binmode $sock, ":raw";
82	elmex	1.1
83			$self->{r} =
84			AnyEvent->io (poll => 'r', fh => $sock, cb => sub {
85			my $l = sysread $sock, my $data, 1024;
86
87			if ($l) {
88	elmex	1.4	$self->{read_buffer} .= decode_utf8 $data;
89	elmex	1.1	$self->handle_data (\$self->{read_buffer});
90
91			} else {
92			return if $! == Errno::EAGAIN;
93			if (defined $l) {
94	elmex	1.5	$self->disconnect ("EOF from server '$self->{host}:$self->{port}'");
95	elmex	1.1	return;
96
97			} else {
98	elmex	1.5	$self->disconnect ("Error while reading from server '$self->{host}:$port': $!");
99	elmex	1.1	return;
100			}
101			}
102			});
103			return 1;
104			}
105
106			sub end_sockets {
107			my ($self) = @_;
108			delete $self->{r};
109			delete $self->{w};
110			if (delete $self->{ssl_enabled}) {
111			Net::SSLeay::free ($self->{ssl});
112			delete $self->{ssl};
113			Net::SSLeay::CTX_free ($self->{ctx});
114			delete $self->{ctx};
115			}
116	elmex	1.5	close ($self->{socket});
117			delete $self->{socket};
118	elmex	1.1	}
119
120			sub try_ssl_write {
121			my ($self) = @_;
122
123	elmex	1.2	my $l = Net::SSLeay::write ($self->{ssl}, $self->{write_buffer});
124	elmex	1.1
125			if ($l <= 0) {
126			if ($l == 0) {
127	elmex	1.5	$self->disconnect ("unexpected EOF from server (ssl) '$self->{host}:$self->{port}'");
128	elmex	1.1	return;
129
130			} else {
131			my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
132			if ($err2 == 2 \|\| $err2 == 3) {
133			delete $self->{w};
134			$self->make_ssl_write_watcher ($err2 == 2 ? 'r' : 'w');
135			return;
136			}
137
138			if ($! != Errno::EAGAIN
139			or my $err = Net::SSLeay::ERR_get_error) {
140
141	elmex	1.5	$self->disconnect (
142	elmex	1.1	sprintf (
143			"Error while writing from server '$self->{host}:$self->{port}': (%d\|%s\|%s)",
144			$err2, (Net::SSLeay::ERR_error_string $err), "$!")
145			);
146			return;
147			}
148			}
149			} else {
150	elmex	1.2	$self->debug_wrote_data (substr $self->{write_buffer}, 0, $l);
151			$self->{write_buffer} = substr $self->{write_buffer}, $l;
152			if (length ($self->{write_buffer}) <= 0) {
153			delete $self->{w};
154			}
155	elmex	1.1	}
156			}
157
158			sub try_ssl_read {
159			my ($self) = @_;
160	elmex	1.2	my $r = Net::SSLeay::read ($self->{ssl});
161
162			if (defined $r) {
163			$self->{read_buffer} .= decode_utf8 ($r);
164			$self->handle_data (\$self->{read_buffer});
165			} else {
166			my $err2 = Net::SSLeay::get_error $self->{ssl}, $l;
167			if ($err2 == 2 \|\| $err2 == 3) {
168	elmex	1.6	#d# warn "READ RETRY $err2\n";
169	elmex	1.2	delete $self->{r};
170			$self->make_ssl_read_watcher ($err2 == 2 ? 'r' : 'w');
171			return;
172			}
173
174			if ($! != Errno::EAGAIN
175			or my $err = Net::SSLeay::ERR_get_error) {
176	elmex	1.1
177	elmex	1.5	$self->disconnect (
178	elmex	1.2	sprintf (
179			"Error while reading from server '$self->{host}:$self->{port}':"
180			."(%d\|%s\|%s)",
181			$err2, (Net::SSLeay::ERR_error_string $err), "$!")
182			);
183	elmex	1.1	return;
184			}
185			}
186			}
187
188			sub write_data {
189			my ($self, $data) = @_;
190			#return unless $self->{r};
191
192			my $cl = $self->{socket};
193	elmex	1.4	$self->{write_buffer} .= encode_utf8 ($data);
194	elmex	1.1
195			unless ($self->{w}) {
196	elmex	1.2	$self->{w} =
197			AnyEvent->io (poll => 'w', fh => $cl, cb => sub {
198			if (not $self->{ssl_enabled}) {
199	elmex	1.1	if (my $data = $self->{write_buffer}) {
200			my $len = syswrite $cl, $data;
201			unless ($len) {
202			return if $! == Errno::EAGAIN;
203			if (not defined $len) {
204			warn "error when writing data on $self->{host}:$self->{port}: $!";
205			return;
206			} else {
207			delete $self->{w};
208			}
209			}
210
211			if ($len == length $self->{write_buffer}) {
212			delete $self->{w};
213			}
214
215			$self->debug_wrote_data (substr $self->{write_buffer}, 0, $len);
216			$self->{write_buffer} = substr $self->{write_buffer}, $len;
217			}
218	elmex	1.2	} else {
219			$self->try_ssl_write;
220			}
221			});
222			}
223			}
224
225			sub make_ssl_read_watcher {
226			my ($self, $poll) = @_;
227			return if $self->{r};
228	elmex	1.1
229	elmex	1.2	$poll \|\|= 'r';
230			$self->{r} =
231			AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
232			$self->try_ssl_read;
233			});
234			}
235
236			sub make_ssl_write_watcher {
237			my ($self, $poll) = @_;
238			return if $self->{w};
239
240			$poll \|\|= 'w';
241			$self->{w} =
242			AnyEvent->io (poll => $poll, fh => $self->{socket}, cb => sub {
243			$self->try_ssl_write;
244			});
245	elmex	1.1	}
246
247			sub enable_ssl {
248			my ($self) = @_;
249
250			$Net::SSLeay::ssl_version = 10; # Insist on TLSv1
251
252			$self->{ssl_enabled} = 1;
253
254	elmex	1.3	#d# warn "START TLS!\n";
255	elmex	1.1
256			$self->{r} = undef;
257			$self->{w} = undef;
258
259			$self->{ctx} = Net::SSLeay::CTX_new ();
260	elmex	1.3
261	elmex	1.2	# enable SSL_MODE_ENABLE_PARTIAL_WRITE and SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
262			Net::SSLeay::CTX_set_mode($self->{ctx}, 1 \| 2);
263	elmex	1.3
264	elmex	1.1	$self->{ssl} = Net::SSLeay::new ($self->{ctx});
265
266			Net::SSLeay::set_fd ($self->{ssl}, fileno $self->{socket});
267			#d# warn "CONNECT\n";
268			Net::SSLeay::connect $self->{ssl};
269			#d# warn "CONNECT END\n";
270			binmode $self->{socket}, ":bytes";
271
272			$self->{ssl_read_data} = "";
273			$self->make_ssl_read_watcher;
274			}
275
276	elmex	1.5	sub disconnect {
277			my ($self, $msg) = @_;
278			$self->end_sockets;
279			$self->{disconnect_cb}->($self->{host}, $self->{port}, $msg);
280			}
281
282	elmex	1.1	1;