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websocket: improve masking performance

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in order to make websocket proxying feasible as general tunnel, we need
to be able to transfer more than a few MB/s

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
This commit is contained in:
Fabian Grünbichler 2020-03-06 11:20:27 +01:00 committed by Thomas Lamprecht
parent 597f8fb9d1
commit c55702c39b
1 changed files with 9 additions and 9 deletions
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18
PVE/APIServer/AnyEvent.pm
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@ -479,19 +479,19 @@ sub websocket_proxy {
my $data = substr($hdl->{rbuf}, 0, $offset + 4 + $payload_len, ''); # now consume data my $data = substr($hdl->{rbuf}, 0, $offset + 4 + $payload_len, ''); # now consume data
my @mask = (unpack('C', substr($data, $offset+0, 1)), my $mask = substr($data, $offset, 4);
unpack('C', substr($data, $offset+1, 1)),
unpack('C', substr($data, $offset+2, 1)),
unpack('C', substr($data, $offset+3, 1)));
$offset += 4; $offset += 4;
my $payload = substr($data, $offset, $payload_len); my $payload = substr($data, $offset, $payload_len);
for (my $i = 0; $i < $payload_len; $i++) { # NULL-mask might be used over TLS, skip to increase performance
my $d = unpack('C', substr($payload, $i, 1)); if ($mask ne pack('N', 0)) {
my $n = $d ^ $mask[$i % 4]; # repeat 4 byte mask to payload length + up to 4 byte
substr($payload, $i, 1, pack('C', $n)); $mask = $mask x (int($payload_len / 4) + 1);
# truncate mask to payload length
substr($mask, $payload_len) = "";
# (un-)apply mask
$payload ^= $mask;
} }
$payload = decode_base64($payload) if !$binary; $payload = decode_base64($payload) if !$binary;