http2: add ping event

Add a `Http2Session` event whenever a non-ack `PING` is received.

Fixes: https://github.com/nodejs/node/issues/18514

PR-URL: https://github.com/nodejs/node/pull/23009
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/internal/http2/core.js b/lib/internal/http2/core.js
index 9cfa2fe4cc..d5ea26374f 100644
--- a/lib/internal/http2/core.js
+++ b/lib/internal/http2/core.js
@@ -346,6 +346,15 @@ function submitRstStream(code) {
   }
 }
 
+function onPing(payload) {
+  const session = this[kOwner];
+  if (session.destroyed)
+    return;
+  session[kUpdateTimer]();
+  debug(`Http2Session ${sessionName(session[kType])}: new ping received`);
+  session.emit('ping', payload);
+}
+
 // Called when the stream is closed either by sending or receiving an
 // RST_STREAM frame, or through a natural end-of-stream.
 // If the writable and readable sides of the stream are still open at this
@@ -821,6 +830,7 @@ function setupHandle(socket, type, options) {
   handle.error = onSessionInternalError;
   handle.onpriority = onPriority;
   handle.onsettings = onSettings;
+  handle.onping = onPing;
   handle.onheaders = onSessionHeaders;
   handle.onframeerror = onFrameError;
   handle.ongoawaydata = onGoawayData;