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root |
1.1 |
package tbf; |
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# kind of token-bucket-filter |
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root |
1.8 |
our $max_per_client = $::TBF_MAX_PER_CLIENT || 118000; |
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root |
1.1 |
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sub new { |
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my $class = shift; |
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my %arg = @_; |
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my $self = bless \%arg, $class; |
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root |
1.7 |
$self->{maxbucket} ||= $self->{rate} * 60; # max bucket |
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root |
1.1 |
$self->{minbucket} ||= $self->{rate}; # minimum bucket to share |
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$self->{interval} ||= $::BUFSIZE / $max_per_client; # good default interval |
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if ($self->{rate}) { |
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root |
1.6 |
$self->{w} = EV::periodic 0, $self->{interval}, undef, sub { |
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$self->inject ($self->{rate} * $self->{interval}); |
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}; |
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root |
1.1 |
} else { |
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die "chaining not yet implemented\n"; |
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} |
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$self; |
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} |
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sub inject { |
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my ($self, $bytes) = @_; |
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$self->{bucket} += $bytes; |
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while ($self->{bucket} >= $self->{minbucket}) { |
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if ($self->{waitw}) { |
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my $rate = $self->{bucket} / $self->{waitw}; |
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for my $v (values %{$self->{waitq}}) { |
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$self->{bucket} -= $rate * $v->[0]; |
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$v->[1] += $rate * $v->[0]; |
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if ($v->[1] >= $v->[2]) { |
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$self->{bucket} += $v->[1] - $v->[2]; |
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$v->[3]->(); |
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} |
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} |
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} |
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root |
1.3 |
last; |
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} |
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root |
1.1 |
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root |
1.3 |
if ($self->{maxbucket} < $self->{bucket}) { |
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::unused_bandwidth ($self->{bucket} - $self->{maxbucket}); |
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$self->{bucket} = $self->{maxbucket}; |
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root |
1.1 |
} |
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} |
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my $_tbf_id; |
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sub request { |
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my ($self, $bytes, $weight) = @_; |
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$weight ||= 1; |
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root |
1.7 |
my $id = $_tbf_id++; |
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my $cb = Coro::rouse_cb; |
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root |
1.2 |
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$self->{waitw} += $weight; |
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$self->{waitq}{$id} = [$weight, 0, $bytes, sub { |
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delete $self->{waitq}{$id}; |
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$self->{waitw} -= $weight; |
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root |
1.7 |
&$cb; |
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root |
1.2 |
}]; |
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root |
1.7 |
Coro::rouse_wait; |
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root |
1.1 |
} |
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1; |
