# Dobrica Pavlinusic, 06/18/07 10:19:50 CEST package CWMP::Session; use strict; use warnings; use base qw/Class::Accessor/; __PACKAGE__->mk_accessors( qw/ debug store sock state queue store / ); use HTTP::Daemon; use Data::Dump qw/dump/; use Carp qw/confess cluck croak/; use File::Slurp; use CWMP::Request; use CWMP::Methods; use CWMP::Store; =head1 NAME CWMP::Session - implement logic of CWMP protocol =head1 METHODS =head2 new my $server = CWMP::Session->new({ sock => $io_socket_object, store => 'state.db', queue => [ 'GetRPCMethods', [ 'GetParameterValyes', 'InternetGatewayDevice.DeviceInfo.SerialNumber', 0 ], ], debug => 1, }); =cut sub new { my $class = shift; my $self = $class->SUPER::new( @_ ); confess "need sock" unless $self->sock; $self->debug( 0 ) unless $self->debug; warn "created ", __PACKAGE__, "(", dump( @_ ), ") for ", $self->sock->peerhost, "\n" if $self->debug; my $store_obj = CWMP::Store->new({ debug => $self->debug, %{ $self->store }, }); croak "can't open ", dump( $self->store ), ": $!" unless $store_obj; # FIXME looks ugly. Should we have separate accessor for this? $self->store( $store_obj ); return $self; } =head2 process_request One request from client/response from server cycle. Call multiple times to facilitate brain-dead concept of adding state to stateless protocol like HTTP. If used with debugging level of 3 or more, it will also create dumps of requests named C<< dump/nr.request >> where C is number from 0 to total number of requests in single session. =cut my $dump_nr = 0; sub process_request { my $self = shift; my $sock = $self->sock || die "no sock?"; # die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'Net::Server::Proto::TCP' ); if ( ! $sock->connected ) { warn "SOCKET NOT CONNECTED\n"; return 0; } bless $sock, 'HTTP::Daemon::ClientConn'; # why do I have to do this? # solution from http://use.perl.org/~Matts/journal/12896 ${*$sock}{'httpd_daemon'} = HTTP::Daemon->new; my $r = $sock->get_request || confess "can't get_request"; my $xml = $r->content; my $size = length( $xml ); warn "<<<< ", $sock->peerhost, " [" . localtime() . "] ", $r->method, " ", $r->uri, " $size bytes\n"; $dump_nr++; my $file = sprintf("dump/%04d-%s.request", $dump_nr, $sock->peerhost); if ( $self->debug > 2 ) { write_file( $file, $r->as_string ); warn "### request dumped to file: $file\n"; } my $state; if ( $size > 0 ) { die "no SOAPAction header in ",dump($xml) unless defined ( $r->header('SOAPAction') ); warn "## request payload: ",length($xml)," bytes\n$xml\n" if $self->debug; $state = CWMP::Request->parse( $xml ); if ( defined( $state->{_dispatch} ) && $self->debug > 2 ) { my $type = sprintf("dump/%04d-%s-%s", $dump_nr, $sock->peerhost, $state->{_dispatch}); symlink $file, $type || warn "can't symlink $file -> $type: $!"; } warn "## acquired state = ", dump( $state ), "\n"; $self->state( $state ); $self->store->update_state( ID => $state->{ID}, $state ); } else { warn "## empty request, using last request state\n"; $state = $self->state; delete( $state->{_dispatch} ); #warn "last request state = ", dump( $state ), "\n" if $self->debug > 1; } $sock->send(join("\r\n", 'HTTP/1.1 200 OK', 'Content-Type: text/xml; charset="utf-8"', 'Server: AcmeCWMP/42', 'SOAPServer: AcmeCWMP/42' )."\r\n"); $sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} ); $xml = ''; if ( my $dispatch = $state->{_dispatch} ) { $xml = $self->dispatch( $dispatch ); } elsif ( $dispatch = shift @{ $self->queue } ) { $xml = $self->dispatch( $dispatch ); } elsif ( $size == 0 ) { warn ">>> no more queued commands, closing connection\n"; return 0; } else { warn ">>> empty response\n"; $state->{NoMoreRequests} = 1; $xml = $self->dispatch( 'xml', sub {} ); } $sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" ); $sock->send( $xml ) or die "can't send response"; warn ">>>> " . $sock->peerhost . " [" . localtime() . "] sent ", length( $xml )," bytes\n"; warn "### request over\n" if $self->debug; return 1; # next request }; =head2 dispatch $xml = $self->dispatch('Inform', $response_arguments ); If debugging level of 3 or more, it will create dumps of responses named C<< dump/nr.response >> =cut sub dispatch { my $self = shift; my $dispatch = shift || die "no dispatch?"; my @args = @_; if ( ref($dispatch) eq 'ARRAY' ) { my @a = @$dispatch; $dispatch = shift @a; push @args, @a; } my $response = CWMP::Methods->new({ debug => $self->debug }); if ( $response->can( $dispatch ) ) { warn ">>> dispatching to $dispatch\n"; my $xml = $response->$dispatch( $self->state, @args ); warn "## response payload: ",length($xml)," bytes\n$xml\n" if $self->debug; if ( $self->debug > 2 ) { my $file = sprintf("dump/%04d-%s.response", $dump_nr++, $self->sock->peerhost); write_file( $file, $xml ); warn "### response dump: $file\n"; } return $xml; } else { confess "can't dispatch to $dispatch"; } }; =head2 error return $self->error( 501, 'System error' ); =cut sub error { my ($self, $number, $msg) = @_; $msg ||= 'ERROR'; $self->sock->send( "HTTP/1.1 $number $msg\r\n" ); warn "Error - $number - $msg\n"; return 0; # close connection } 1;