1package Protocol::HTTP2::Frame::Priority; 2use strict; 3use warnings; 4use Protocol::HTTP2::Constants qw(:flags :errors); 5use Protocol::HTTP2::Trace qw(tracer); 6 7sub decode { 8 my ( $con, $buf_ref, $buf_offset, $length ) = @_; 9 my $frame_ref = $con->decode_context->{frame}; 10 11 # Priority frames MUST be associated with a stream 12 if ( $frame_ref->{stream} == 0 ) { 13 $con->error(PROTOCOL_ERROR); 14 return undef; 15 } 16 17 if ( $length != 5 ) { 18 $con->error(FRAME_SIZE_ERROR); 19 return undef; 20 } 21 22 my ( $stream_dep, $weight ) = 23 unpack( 'NC', substr( $$buf_ref, $buf_offset, 5 ) ); 24 my $exclusive = $stream_dep >> 31; 25 $stream_dep &= 0x7FFF_FFFF; 26 $weight++; 27 28 $con->stream_weight( $frame_ref->{stream}, $weight ); 29 unless ( 30 $con->stream_reprio( $frame_ref->{stream}, $exclusive, $stream_dep ) ) 31 { 32 tracer->error("Malformed priority frame"); 33 $con->error(PROTOCOL_ERROR); 34 return undef; 35 } 36 37 return $length; 38} 39 40sub encode { 41 my ( $con, $flags_ref, $stream, $data_ref ) = @_; 42 my $stream_dep = $data_ref->[0]; 43 my $weight = $data_ref->[1] - 1; 44 pack( 'NC', $stream_dep, $weight ); 45} 46 471; 48