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package Protocol::HTTP2::Frame::Priority;
use strict;
use warnings;
use Protocol::HTTP2::Constants qw(:flags :errors);
use Protocol::HTTP2::Trace qw(tracer);
sub decode {
my ( $con, $buf_ref, $buf_offset, $length ) = @_;
my $frame_ref = $con->decode_context->{frame};
# Priority frames MUST be associated with a stream
if ( $frame_ref->{stream} == 0 ) {
$con->error(PROTOCOL_ERROR);
return undef;
}
if ( $length != 5 ) {
$con->error(FRAME_SIZE_ERROR);
return undef;
}
my ( $stream_dep, $weight ) =
unpack( 'NC', substr( $$buf_ref, $buf_offset, 5 ) );
my $exclusive = $stream_dep >> 31;
$stream_dep &= 0x7FFF_FFFF;
$weight++;
$con->stream_weight( $frame_ref->{stream}, $weight );
unless (
$con->stream_reprio( $frame_ref->{stream}, $exclusive, $stream_dep ) )
{
tracer->error("Malformed priority frame");
$con->error(PROTOCOL_ERROR);
return undef;
}
return $length;
}
sub encode {
my ( $con, $flags_ref, $stream, $data_ref ) = @_;
my $stream_dep = $data_ref->[0];
my $weight = $data_ref->[1] - 1;
pack( 'NC', $stream_dep, $weight );
}
1;
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