don't fail if there's an error setting bbr, just log it and continue

src/yggdrasil/tcp_linux.go

@@ -19,10 +19,14 @@ func (t *tcp) tcpContext(network, address string, c syscall.RawConn) error {
 		bbr = unix.SetsockoptString(int(fd), unix.IPPROTO_TCP, unix.TCP_CONGESTION, "bbr")
 	})
 
-	switch {
+	// Log any errors
-	case bbr != nil:
+	if bbr != nil {
-		return bbr
+		t.link.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, SetsockoptString error:", bbr)
-	default:
-		return control
 	}
+	if control != nil {
+		t.link.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, Control error:", control)
+	}
+
+	// Return nil because errors here are not considered fatal for the connection, it just means congestion control is suboptimal
+	return nil
 }