May 25, 2023 · May 25, 2023 · Oct 19, 2023
diff --git a/read.go b/read.go

 switch h.opcode {
 case opPing:
 c.closeMu.Lock()
 wroteClose := c.wroteClose
 c.closeMu.Unlock()
 if wroteClose {
 // Cannot respond to ping with a pong because we already sent a close frame.
 return nil
 }
 return c.writeControl(ctx, opPong, b)
 case opPong:
 c.activePingsMu.Lock()
Original file line number	Diff line number	Diff line change
Expand Up		@@ -286,6 +286,13 @@ func (c *Conn) handleControl(ctx context.Context, h header) (err error) {

		switch h.opcode {
		case opPing:
		c.closeMu.Lock()
		wroteClose := c.wroteClose
		c.closeMu.Unlock()
		if wroteClose {
		// Cannot respond to ping with a pong because we already sent a close frame.
		return nil
		}
		return c.writeControl(ctx, opPong, b)
		case opPong:
		c.activePingsMu.Lock()
Expand Down