From 2f169245d3eb10b1882394591d743055ccf35ba9 Mon Sep 17 00:00:00 2001
From: fengbojiang <fengbojiang@tencent.com>
Date: Mon, 14 Aug 2023 20:45:10 +0800
Subject: [PATCH]  Fiexd some build errors of ipfw on ubuntu 22.04
 (kernel:5.19.0-1025, gcc:11.4.0),  Ref #777.

---
 freebsd/net/if_gre.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/freebsd/net/if_gre.h b/freebsd/net/if_gre.h
index de3c59793..852d879ff 100644
--- a/freebsd/net/if_gre.h
+++ b/freebsd/net/if_gre.h
@@ -52,13 +52,13 @@ struct grehdr {
 struct greip {
 	struct ip	gi_ip;
 	struct grehdr	gi_gre;
-} __packed;
+} __packed __aligned(2);
 
 struct greudp {
 	struct ip	gi_ip;
 	struct udphdr	gi_udp;
 	struct grehdr	gi_gre;
-} __packed;
+} __packed __aligned(2);
 #endif /* INET */
 
 #ifdef INET6