From 71a6040f8a59a77535130337b8c7b1eb5fd2672f Mon Sep 17 00:00:00 2001
From: yangwei <yangwei@geedgenetworks.com>
Date: Sun, 23 Jul 2023 23:13:11 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9E=20fix(=5F=5Fmjl=5Fgtp=5Fcalc=5Fgtp?=
 =?UTF-8?q?=5Fhdr=5Flen):=20=E4=BF=AE=E5=A4=8D=E9=95=BF=E5=BA=A6=E8=AE=A1?=
 =?UTF-8?q?=E7=AE=97=E8=B6=85=E8=BF=87=E5=8C=85=E9=95=BF=E7=9A=84=E9=94=99?=
 =?UTF-8?q?=E8=AF=AF?=
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---
 src/MESA_jump_layer.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/MESA_jump_layer.cpp b/src/MESA_jump_layer.cpp
index f91f1c0..c24a4f0 100644
--- a/src/MESA_jump_layer.cpp
+++ b/src/MESA_jump_layer.cpp
@@ -211,7 +211,11 @@ static int __mjl_gtp_calc_gtp_hdr_len(const struct gtp_hdr *gtph)
 	  return -1; 
 	}
 
-	if(gtph->len > 1460)
+	if(gtph->msg_type != 0xFF){
+	  return -1;
+	}
+
+	if(ntohs(gtph->len) > 1460 || ntohs(gtph->len) < 40)
 	{
 		return -1;
 	}