1 |
root |
1.1 |
package tbf; |
2 |
|
|
|
3 |
|
|
# kind of token-bucket-filter |
4 |
|
|
|
5 |
root |
1.8 |
our $max_per_client = $::TBF_MAX_PER_CLIENT || 118000; |
6 |
root |
1.1 |
|
7 |
|
|
sub new { |
8 |
|
|
my $class = shift; |
9 |
|
|
my %arg = @_; |
10 |
|
|
my $self = bless \%arg, $class; |
11 |
|
|
|
12 |
root |
1.9 |
$self->{maxbucket} ||= $::TBF_MAX_BUCKET || $self->{rate} * 5; # max bucket |
13 |
root |
1.1 |
$self->{minbucket} ||= $self->{rate}; # minimum bucket to share |
14 |
|
|
$self->{interval} ||= $::BUFSIZE / $max_per_client; # good default interval |
15 |
|
|
|
16 |
|
|
if ($self->{rate}) { |
17 |
root |
1.6 |
$self->{w} = EV::periodic 0, $self->{interval}, undef, sub { |
18 |
|
|
$self->inject ($self->{rate} * $self->{interval}); |
19 |
|
|
}; |
20 |
root |
1.1 |
} else { |
21 |
|
|
die "chaining not yet implemented\n"; |
22 |
|
|
} |
23 |
|
|
|
24 |
|
|
$self; |
25 |
|
|
} |
26 |
|
|
|
27 |
|
|
sub inject { |
28 |
|
|
my ($self, $bytes) = @_; |
29 |
|
|
|
30 |
|
|
$self->{bucket} += $bytes; |
31 |
|
|
|
32 |
|
|
while ($self->{bucket} >= $self->{minbucket}) { |
33 |
|
|
if ($self->{waitw}) { |
34 |
|
|
my $rate = $self->{bucket} / $self->{waitw}; |
35 |
|
|
|
36 |
|
|
for my $v (values %{$self->{waitq}}) { |
37 |
|
|
$self->{bucket} -= $rate * $v->[0]; |
38 |
|
|
$v->[1] += $rate * $v->[0]; |
39 |
|
|
|
40 |
|
|
if ($v->[1] >= $v->[2]) { |
41 |
|
|
$self->{bucket} += $v->[1] - $v->[2]; |
42 |
|
|
$v->[3]->(); |
43 |
|
|
} |
44 |
|
|
} |
45 |
|
|
|
46 |
|
|
} |
47 |
root |
1.3 |
last; |
48 |
|
|
} |
49 |
root |
1.1 |
|
50 |
root |
1.3 |
if ($self->{maxbucket} < $self->{bucket}) { |
51 |
|
|
::unused_bandwidth ($self->{bucket} - $self->{maxbucket}); |
52 |
|
|
$self->{bucket} = $self->{maxbucket}; |
53 |
root |
1.1 |
} |
54 |
|
|
} |
55 |
|
|
|
56 |
|
|
my $_tbf_id; |
57 |
|
|
|
58 |
|
|
sub request { |
59 |
|
|
my ($self, $bytes, $weight) = @_; |
60 |
|
|
|
61 |
|
|
$weight ||= 1; |
62 |
|
|
|
63 |
root |
1.7 |
my $id = $_tbf_id++; |
64 |
|
|
my $cb = Coro::rouse_cb; |
65 |
root |
1.2 |
|
66 |
|
|
$self->{waitw} += $weight; |
67 |
|
|
$self->{waitq}{$id} = [$weight, 0, $bytes, sub { |
68 |
|
|
delete $self->{waitq}{$id}; |
69 |
|
|
$self->{waitw} -= $weight; |
70 |
root |
1.7 |
&$cb; |
71 |
root |
1.2 |
}]; |
72 |
|
|
|
73 |
root |
1.7 |
Coro::rouse_wait; |
74 |
root |
1.1 |
} |
75 |
|
|
|
76 |
|
|
1; |