lib/CWMP/Session.pm

# Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST
package CWMP::Server;

use strict;
use warnings;

use base qw/Class::Accessor/;
__PACKAGE__->mk_accessors( qw/
debug
port
sock
/ );

use IO::Socket::INET;
use Data::Dump qw/dump/;
use CWMP::Request;
use CWMP::Response;
use Carp qw/confess cluck/;

=head1 NAME

CWMP::Server - implement logic of CWMP protocol

=head1 METHODS

=head2 new

  my $server = CWMP::Server->new({ port => 3333 });

=head2 run

  $server->run();

=cut

sub run {
        my $self = shift;

        my $listen = IO::Socket::INET->new(
                Listen    => 5,
#               LocalAddr => 'localhost',
                LocalPort => $self->port,
                Proto     => 'tcp',
                Blocking  => 1,
                ReuseAddr => 1,
        );

        warn "waiting for request on port ", $self->port, $/;

        while ( my $sock = $listen->accept ) {
                $sock->autoflush(1);

                warn "connection from ", $sock->peerhost, "\n";

                $self->sock( $sock );   # FIXME this will not work for multiple clients
                $self->process_request( $sock );

                warn "...another one bites a dust...\n";
                sleep 1;
        }
}

sub process_request {
        my $self = shift;

        my $sock = shift || die "no sock?";

        die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'IO::Socket::INET' );

        $sock->autoflush( 1 );
        $sock->blocking( 1 );

        ### read the first line of response
        my $line = $sock->getline; # || $self->error(400, "No Data");

        $line =~ s/[\r\n]+$//;
        if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/1.\d) $ /x) {
                return $self->error(400, "Bad request");
        }
        my ($method, $req, $protocol) = ($1, $2, $3);
        warn "<<<< ",join(" ", time, $method, $req)."\n";

        ### read in other headers
        $self->read_headers($sock) || return $self->error(400, "Strange headers");

        ### do we support the type
#       if ($method !~ /GET|POST|HEAD/) {
        if ($method !~ /POST/) {
                return $self->error(400, "Unsupported Method");
        }

    my $chunk;
        my $transfer_encoding = $self->header('Transfer-Encoding');

        if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {

                my $len = 0;

                do {

                        warn "get chunk len\n" if $self->debug;
                        
                        my $hex;
                        do {
                                $hex = $sock->getline;
                                $hex =~ s/[\n\r]+$//;
                        } until ( $hex ne '' );

                        die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i);
                        $len = hex( $hex );

                        warn "getting chunk of $len bytes\n" if $self->debug;

                        $sock->read( my $buff, $len );
                        $chunk .= $buff;

                        warn "--- $len bytes: --=>||$buff||<=--\n";

                } while ( $len > 0 );

        } else {
                die "right now, we support only Transfer-Encoding: chunked";
        }

        warn "handler got ", length($chunk), " bytes\n" if $self->debug;

        warn "<<< " . localtime() . " " . $sock->peerhost . "\n";

        die "not SOAP request" unless defined ( $self->header('SOAPAction') );

        my $state;

        if ( $chunk ) {
                warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug;

                $state = CWMP::Request->parse( $chunk );

                warn "acquired state = ", dump( $state ), "\n";
        
        } else {
                warn "empty request\n";
        }


        my $response = CWMP::Response->new({ debug => $self->debug });

        $sock->print(
                $self->status(200),
                $self->content_type('text/xml; charset="utf-8"'),
                "Server: AcmeCWMP/42\r\n",
                "SOAPServer: AcmeCWMP/42\r\n"
        );

        $sock->print( "Set-Cookie: ID=" , $state->{ID}, "; path=/\r\n" ) if ( $state->{ID} );
        
        my $xml = '';

        if ( my $dispatch = $state->{_dispatch} ) {
                if ( $response->can( $dispatch ) ) {
                        warn ">>> dispatching to $dispatch\n";
                        $xml = $response->$dispatch( $state ) . "\r\n";
                        warn "## response payload: ",length($xml)," bytes\n$xml\n";
                } else {
                        confess "can't dispatch to $dispatch";
                }
        } else {
                warn ">>> empty response\n";
        }

        $sock->print( "Content-length: ", length( $xml ), "\r\n\r\n" );
        $sock->print( $xml ) or die "can't send response";

        warn "### request over";

};


sub read_headers {
  my $self = shift;

        my $sock = shift || die "no sock?";

  $self->{headers} = {};

  while (defined($_ = $sock->getline)) {
    s/[\r\n]+$//;
    last unless length $_;
        warn "-- $_\n";
    return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x;
    $self->{headers}->{$1} = $2;
  }

  return 1;
}

sub header {
        my $self = shift;
        my $header = shift || die "no header?";
        if ( defined( $self->{headers}->{$header} )) {
                return $self->{headers}->{$header};
        } else {
                return;
        }
}

sub content_type {
  my ($self, $type) = @_;
  $self->http_header;
  return "Content-type: $type\r\n";
}

sub error{
  my ($self, $number, $msg) = @_;
  $self->sock->print( $self->status($number, $msg), "\r\n" );
  warn "Error - $number - $msg\n";
}

sub status {
  my ($self, $number, $msg) = @_;
  $msg = '' if ! defined $msg;
  return if $self->http_header($number);
  return "Status $number: $msg\r\n";
}

sub http_header {
  my $self = shift;
  my $number = shift || 200;
  return if ! delete $self->{needs_header};
  $self->sock->Print("HTTP/1.0 $number\r\n");
  return 1;
}

1;
1	dpavlin	30	# Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST
2			package CWMP::Server;
3
4			use strict;
5			use warnings;
6
7	dpavlin	40	use base qw/Class::Accessor/;
8	dpavlin	30	__PACKAGE__->mk_accessors( qw/
9			debug
10	dpavlin	40	port
11	dpavlin	41	sock
12	dpavlin	30	/ );
13
14	dpavlin	40	use IO::Socket::INET;
15	dpavlin	30	use Data::Dump qw/dump/;
16	dpavlin	35	use CWMP::Request;
17			use CWMP::Response;
18	dpavlin	40	use Carp qw/confess cluck/;
19	dpavlin	30
20	dpavlin	34	=head1 NAME
21
22			CWMP::Server - implement logic of CWMP protocol
23
24			=head1 METHODS
25
26	dpavlin	40	=head2 new
27	dpavlin	34
28	dpavlin	40	my $server = CWMP::Server->new({ port => 3333 });
29	dpavlin	34
30	dpavlin	40	=head2 run
31
32			$server->run();
33
34	dpavlin	34	=cut
35
36	dpavlin	40	sub run {
37			my $self = shift;
38	dpavlin	30
39	dpavlin	40	my $listen = IO::Socket::INET->new(
40			Listen => 5,
41			# LocalAddr => 'localhost',
42			LocalPort => $self->port,
43			Proto => 'tcp',
44			Blocking => 1,
45			ReuseAddr => 1,
46			);
47
48			warn "waiting for request on port ", $self->port, $/;
49
50			while ( my $sock = $listen->accept ) {
51			$sock->autoflush(1);
52
53			warn "connection from ", $sock->peerhost, "\n";
54
55	dpavlin	41	$self->sock( $sock ); # FIXME this will not work for multiple clients
56	dpavlin	40	$self->process_request( $sock );
57
58			warn "...another one bites a dust...\n";
59			sleep 1;
60			}
61			}
62
63			sub process_request {
64			my $self = shift;
65
66			my $sock = shift \|\| die "no sock?";
67
68			die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'IO::Socket::INET' );
69
70			$sock->autoflush( 1 );
71			$sock->blocking( 1 );
72
73			### read the first line of response
74			my $line = $sock->getline; # \|\| $self->error(400, "No Data");
75
76			$line =~ s/[\r\n]+$//;
77			if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/1.\d) $ /x) {
78			return $self->error(400, "Bad request");
79			}
80			my ($method, $req, $protocol) = ($1, $2, $3);
81			warn "<<<< ",join(" ", time, $method, $req)."\n";
82
83			### read in other headers
84			$self->read_headers($sock) \|\| return $self->error(400, "Strange headers");
85
86			### do we support the type
87			# if ($method !~ /GET\|POST\|HEAD/) {
88			if ($method !~ /POST/) {
89			return $self->error(400, "Unsupported Method");
90			}
91
92	dpavlin	30	my $chunk;
93			my $transfer_encoding = $self->header('Transfer-Encoding');
94
95			if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) {
96
97	dpavlin	31	my $len = 0;
98	dpavlin	40
99	dpavlin	30	do {
100
101	dpavlin	40	warn "get chunk len\n" if $self->debug;
102
103			my $hex;
104			do {
105			$hex = $sock->getline;
106			$hex =~ s/[\n\r]+$//;
107			} until ( $hex ne '' );
108	dpavlin	30
109	dpavlin	40	die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i);
110			$len = hex( $hex );
111	dpavlin	30
112	dpavlin	40	warn "getting chunk of $len bytes\n" if $self->debug;
113	dpavlin	30
114	dpavlin	40	$sock->read( my $buff, $len );
115			$chunk .= $buff;
116	dpavlin	30
117	dpavlin	40	warn "--- $len bytes: --=>\|\|$buff\|\|<=--\n";
118	dpavlin	30
119	dpavlin	40	} while ( $len > 0 );
120	dpavlin	30
121	dpavlin	40	} else {
122			die "right now, we support only Transfer-Encoding: chunked";
123			}
124	dpavlin	34
125	dpavlin	40	warn "handler got ", length($chunk), " bytes\n" if $self->debug;
126	dpavlin	34
127	dpavlin	40	warn "<<< " . localtime() . " " . $sock->peerhost . "\n";
128	dpavlin	34
129	dpavlin	40	die "not SOAP request" unless defined ( $self->header('SOAPAction') );
130	dpavlin	30
131	dpavlin	36	my $state;
132
133	dpavlin	40	if ( $chunk ) {
134			warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug;
135	dpavlin	30
136	dpavlin	40	$state = CWMP::Request->parse( $chunk );
137	dpavlin	34
138	dpavlin	40	warn "acquired state = ", dump( $state ), "\n";
139	dpavlin	34
140	dpavlin	36	} else {
141			warn "empty request\n";
142	dpavlin	34	}
143
144	dpavlin	40
145	dpavlin	35	my $response = CWMP::Response->new({ debug => $self->debug });
146	dpavlin	34
147	dpavlin	41	$sock->print(
148			$self->status(200),
149			$self->content_type('text/xml; charset="utf-8"'),
150			"Server: AcmeCWMP/42\r\n",
151			"SOAPServer: AcmeCWMP/42\r\n"
152			);
153	dpavlin	30
154	dpavlin	41	$sock->print( "Set-Cookie: ID=" , $state->{ID}, "; path=/\r\n" ) if ( $state->{ID} );
155	dpavlin	40
156			my $xml = '';
157
158	dpavlin	36	if ( my $dispatch = $state->{_dispatch} ) {
159			if ( $response->can( $dispatch ) ) {
160			warn ">>> dispatching to $dispatch\n";
161	dpavlin	40	$xml = $response->$dispatch( $state ) . "\r\n";
162			warn "## response payload: ",length($xml)," bytes\n$xml\n";
163	dpavlin	36	} else {
164			confess "can't dispatch to $dispatch";
165			}
166			} else {
167			warn ">>> empty response\n";
168			}
169	dpavlin	40
170	dpavlin	41	$sock->print( "Content-length: ", length( $xml ), "\r\n\r\n" );
171			$sock->print( $xml ) or die "can't send response";
172	dpavlin	40
173			warn "### request over";
174
175	dpavlin	30	};
176
177	dpavlin	40
178			sub read_headers {
179			my $self = shift;
180
181			my $sock = shift \|\| die "no sock?";
182
183			$self->{headers} = {};
184
185			while (defined($_ = $sock->getline)) {
186			s/[\r\n]+$//;
187			last unless length $_;
188			warn "-- $_\n";
189			return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x;
190			$self->{headers}->{$1} = $2;
191			}
192
193			return 1;
194			}
195
196			sub header {
197			my $self = shift;
198			my $header = shift \|\| die "no header?";
199			if ( defined( $self->{headers}->{$header} )) {
200			return $self->{headers}->{$header};
201			} else {
202			return;
203			}
204			}
205
206			sub content_type {
207			my ($self, $type) = @_;
208			$self->http_header;
209			return "Content-type: $type\r\n";
210			}
211
212			sub error{
213			my ($self, $number, $msg) = @_;
214	dpavlin	41	$self->sock->print( $self->status($number, $msg), "\r\n" );
215	dpavlin	40	warn "Error - $number - $msg\n";
216			}
217
218			sub status {
219			my ($self, $number, $msg) = @_;
220			$msg = '' if ! defined $msg;
221			return if $self->http_header($number);
222			return "Status $number: $msg\r\n";
223			}
224
225			sub http_header {
226			my $self = shift;
227			my $number = shift \|\| 200;
228			return if ! delete $self->{needs_header};
229	dpavlin	41	$self->sock->Print("HTTP/1.0 $number\r\n");
230	dpavlin	40	return 1;
231			}
232
233	dpavlin	30	1;