[pve-devel] [PATCH pve-http-server] websocket: set $max_payload_size = 132*1024;

[Dietmar Maurer]

AnyEvent checks rbuf_max after calling the callback (too late), so
we can receive larger data, because AnyEvent uses MAX_READ_SIZE=131072
to fill the buffer.

So a more elegant solution is to set $max_payload_size=32*1024. At lease
I am not able to receive rbuf larger than 32*1024 now. But I keep the
protection from the previous patch - just to be sure.

Signed-off-by: Dietmar Maurer <dietmar at proxmox.com>
---
 PVE/APIServer/AnyEvent.pm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/PVE/APIServer/AnyEvent.pm b/PVE/APIServer/AnyEvent.pm
index 9efd662..f6e04f3 100755
--- a/PVE/APIServer/AnyEvent.pm
+++ b/PVE/APIServer/AnyEvent.pm
@@ -345,7 +345,7 @@ sub websocket_proxy {
 	my $remhost;
 	my $remport;
 
-	my $max_payload_size = 65536;
+	my $max_payload_size = 132*1024;
 
 	my $binary;
 	if ($wsproto eq 'binary') {
@@ -375,7 +375,7 @@ sub websocket_proxy {
 	    $reqstate->{proxyhdl} = AnyEvent::Handle->new(
 		fh => $fh,
 		rbuf_max => $max_payload_size,
-		wbuf_max => $max_payload_size*10,
+		wbuf_max => $max_payload_size*5,
 		timeout => 5,
 		on_eof => sub {
 		    my ($hdl) = @_;
-- 
2.11.0