From: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Date: Fri, 6 Mar 2020 10:20:29 +0000 (+0100)
Subject: websocket_proxy: implement ping/pong support
X-Git-Url: https://git.proxmox.com/?p=pve-http-server.git;a=commitdiff_plain;h=e6cb79b52c387ef6b266f81b2b75bfb3a0adba00

websocket_proxy: implement ping/pong support

needed to keep tunnel connections alive.

> The Ping frame contains an opcode of 0x9.
> [...]
> The Pong frame contains an opcode of 0xA.
-- Section 5.5.2 cf. https://tools.ietf.org/html/rfc6455#section-5.5.2

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---

diff --git a/PVE/APIServer/AnyEvent.pm b/PVE/APIServer/AnyEvent.pm
index 666210d..90f51e8 100644
--- a/PVE/APIServer/AnyEvent.pm
+++ b/PVE/APIServer/AnyEvent.pm
@@ -511,6 +511,11 @@ sub websocket_proxy {
 				$reqstate->{proxyhdl}->push_shutdown();
 		    }
 			$hdl->push_shutdown();
+		    } elsif ($opcode == 9) {
+			# ping received, schedule pong
+			$reqstate->{hdl}->push_write($encode->(\$payload, "\x8A")) if $reqstate->{hdl};
+		    } elsif ($opcode == 0xA) {
+			# pong received, continue
 		    } else {
 			die "received unhandled websocket opcode $opcode\n";
 		    }