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# Dobrica Pavlinusic, <dpavlin@rot13.org> 06/18/07 10:19:50 CEST |
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package CWMP::Server; |
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|
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use strict; |
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use warnings; |
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|
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use base qw/Class::Accessor/; |
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__PACKAGE__->mk_accessors( qw/ |
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debug |
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port |
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sock |
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state |
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queue |
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/ ); |
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|
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use IO::Socket::INET; |
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use Data::Dump qw/dump/; |
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use CWMP::Request; |
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use CWMP::Response; |
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use Carp qw/confess cluck/; |
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|
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=head1 NAME |
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|
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CWMP::Server - implement logic of CWMP protocol |
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|
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=head1 METHODS |
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|
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=head2 new |
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|
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my $server = CWMP::Server->new({ port => 3333 }); |
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|
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=head2 run |
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|
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$server->run(); |
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|
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=cut |
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|
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sub run { |
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my $self = shift; |
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|
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my $listen = IO::Socket::INET->new( |
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Listen => 5, |
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# LocalAddr => 'localhost', |
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LocalPort => $self->port, |
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Proto => 'tcp', |
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Blocking => 1, |
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ReuseAddr => 1, |
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); |
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|
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warn "ACS waiting for request on port ", $self->port, |
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$self->queue ? " queue ( " . join(",",@{$self->queue}) . " )" : "", |
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"\n"; |
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|
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while ( my $sock = $listen->accept ) { |
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$sock->autoflush(1); |
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|
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warn "connection from ", $sock->peerhost, "\n" if $self->debug; |
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|
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$self->sock( $sock ); # FIXME this will not work for multiple clients |
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while ( $self->process_request ) { |
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warn "...another one bites a dust...\n"; |
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} |
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|
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warn "...returning to accepting new connections\n"; |
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} |
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} |
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|
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=head2 process_request |
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|
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One request from client/response from server cycle. Call multiple times to |
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facilitate brain-dead concept of adding state to stateless protocol like |
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HTTP. |
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|
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=cut |
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|
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sub process_request { |
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my $self = shift; |
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|
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my $sock = $self->sock || die "no sock?"; |
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|
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die "not IO::Socket::INET but ", ref( $sock ) unless ( ref($sock) eq 'IO::Socket::INET' ); |
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|
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if ( ! $sock->connected ) { |
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warn "SOCKET NOT CONNECTED\n"; |
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return 0; |
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} |
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|
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$sock->autoflush( 1 ); |
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$sock->blocking( 1 ); |
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|
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### read the first line of response |
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my $line = $sock->getline; |
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return $self->error(400, "No Data") unless ( defined $line ); |
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|
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$line =~ s/[\r\n]+$//; |
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if ($line !~ /^ (\w+) \ + (\S+) \ + (HTTP\/1.\d) $ /x) { |
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warn "ERROR: $line\n"; |
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return $self->error(400, "Bad request"); |
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} |
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my ($method, $req, $protocol) = ($1, $2, $3); |
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warn "<<<< ", $sock->peerhost, " - - [" . localtime() . "] \"$method $req $protocol\"\n"; |
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|
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### read in other headers |
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$self->read_headers || return $self->error(400, "Strange headers"); |
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|
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### do we support the type |
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# if ($method !~ /GET|POST|HEAD/) { |
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if ($method !~ /POST/) { |
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return $self->error(400, "Unsupported Method"); |
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} |
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|
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my $chunk; |
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my $transfer_encoding = $self->header('Transfer-Encoding'); |
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|
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if ( $transfer_encoding && $transfer_encoding =~ qr/^chunked/i ) { |
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|
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my $len = 0; |
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|
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do { |
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|
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warn "get chunk len\n" if $self->debug; |
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|
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my $hex; |
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do { |
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$hex = $sock->getline; |
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$hex =~ s/[\n\r]+$//; |
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} until ( $hex ne '' ); |
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|
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die "chunk size not valid hex: $hex" unless ( $hex =~ m/^[0-9a-f]+$/i); |
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$len = hex( $hex ); |
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|
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warn "getting chunk of $len bytes\n" if $self->debug; |
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|
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$sock->read( my $buff, $len ); |
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$chunk .= $buff; |
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|
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warn "--- $len bytes: --=>||$buff||<=--\n" if $self->debug; |
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|
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} while ( $len > 0 ); |
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my $sep = $sock->getline; |
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die "expected separator, not ", dump( $sep ) if ( $sep !~ m/^[\n\r]+$/ ); |
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|
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} else { |
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die "right now, we support only Transfer-Encoding: chunked"; |
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} |
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|
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my $size = length( $chunk ); |
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|
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warn "<<< " . $sock->peerhost . " [" . localtime() . "] request $size bytes\n"; |
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|
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my $state; |
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|
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if ( $size > 0 ) { |
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|
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die "no SOAPAction header in ",dump($chunk) unless defined ( $self->header('SOAPAction') ); |
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|
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|
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if ( $chunk ) { |
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warn "## request chunk: ",length($chunk)," bytes\n$chunk\n" if $self->debug; |
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|
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$state = CWMP::Request->parse( $chunk ); |
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|
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warn "acquired state = ", dump( $state ), "\n"; |
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|
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$self->state( $state ); |
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|
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} else { |
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warn "empty request\n"; |
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} |
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|
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} else { |
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$state = $self->state; |
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warn "last request state = ", dump( $state ), "\n"; |
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} |
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|
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|
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$sock->send(join("\r\n", |
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'HTTP/1.1 200 OK', |
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'Content-Type: text/xml; charset="utf-8"', |
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'Server: AcmeCWMP/42', |
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'SOAPServer: AcmeCWMP/42' |
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)."\r\n"); |
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|
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$sock->send( "Set-Cookie: ID=" . $state->{ID} . "; path=/\r\n" ) if ( $state->{ID} ); |
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|
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my $xml = ''; |
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|
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if ( my $dispatch = $state->{_dispatch} ) { |
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$xml = $self->dispatch( $dispatch ); |
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} elsif ( $dispatch = shift @{ $self->queue } ) { |
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$xml = $self->dispatch( $dispatch ); |
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} elsif ( $size == 0 ) { |
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warn ">>> closing connection\n"; |
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return 0; |
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} else { |
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warn ">>> empty response\n"; |
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$state->{NoMoreRequests} = 1; |
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$xml = $self->dispatch( 'xml', sub {} ); |
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} |
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|
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$sock->send( "Content-Length: " . length( $xml ) . "\r\n\r\n" ); |
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$sock->send( $xml ) or die "can't send response"; |
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warn "### request over"; |
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|
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}; |
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|
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=head2 dispatch |
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|
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$xml = $self->dispatch('Inform', $response_arguments ); |
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|
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=cut |
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|
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sub dispatch { |
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my $self = shift; |
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|
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my $dispatch = shift || die "no dispatch?"; |
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|
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my $response = CWMP::Response->new({ debug => $self->debug }); |
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|
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if ( $response->can( $dispatch ) ) { |
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warn ">>> dispatching to $dispatch\n"; |
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my $xml = $response->$dispatch( $self->state, @_ ) . "\r\n"; |
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warn "## response payload: ",length($xml)," bytes\n$xml\n" if $self->debug; |
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return $xml; |
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} else { |
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confess "can't dispatch to $dispatch"; |
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} |
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}; |
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|
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=head2 read_headers |
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|
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parse headers from request |
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|
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=cut |
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|
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sub read_headers { |
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my $self = shift; |
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|
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$self->{headers} = {}; |
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|
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while (defined($_ = $self->sock->getline)) { |
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s/[\r\n]+$//; |
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last unless length $_; |
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warn "-- $_\n" if $self->debug; |
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return 0 if ! /^ ([\w\-]+) :[\ \t]* (.*) $/x; |
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$self->{headers}->{$1} = $2; |
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} |
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|
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return 1; |
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} |
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|
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=head2 header |
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|
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Getter for specific header |
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|
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$self->header('Cookies'); |
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|
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=cut |
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|
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sub header { |
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my $self = shift; |
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my $header = shift || die "no header?"; |
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if ( defined( $self->{headers}->{$header} )) { |
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return $self->{headers}->{$header}; |
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} else { |
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return; |
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} |
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} |
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|
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=head2 error |
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|
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return $self->error( 501, 'System error' ); |
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|
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=cut |
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|
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sub error { |
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my ($self, $number, $msg) = @_; |
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$msg ||= 'ERROR'; |
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$self->sock->send( "HTTP/1.1 $number $msg\r\n" ); |
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warn "Error - $number - $msg\n"; |
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return 0; # close connection |
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} |
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|
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1; |
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