From bea2ae5e4686e962256cec5e8e00f253042abed7 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@gnumonks.org>
Date: Thu, 13 Feb 2014 16:54:09 +0100
Subject: [PATCH] gtp: add GTP_F_* flags for GTPv1

---
 gtp.c | 6 +++---
 gtp.h | 4 ++++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/gtp.c b/gtp.c
index 57d9974..61b5f09 100644
--- a/gtp.c
+++ b/gtp.c
@@ -284,15 +284,15 @@ static int gtp1u_udp_encap_recv(struct gtp_instance *gti, struct sk_buff *skb)
 	 * length iteratively */
 
 	/* sequence number present */
-	if (gtp1->flags & 0x02)
+	if (gtp1->flags & GTP1_F_SEQ)
 		min_len += 2;
 
 	/* N-PDU number present */
-	if (gtp1->flags & 0x01)
+	if (gtp1->flags & GTP1_F_NPDU)
 		min_len++;
 
 	/* next extension header type present */
-	if (gtp1->flags & 0x04)
+	if (gtp1->flags & GTP1_F_EXTHDR)
 		min_len += 1;
 
 	/* check if it is T-PDU. */
diff --git a/gtp.h b/gtp.h
index 48a2b27..f5ab04a 100644
--- a/gtp.h
+++ b/gtp.h
@@ -39,4 +39,8 @@ struct gtp1_header { /* According to 3GPP TS 29.060 */
 	__be32	tid;
 } __attribute__ ((packed));
 
+#define GTP1_F_NPDU	0x01
+#define GTP1_F_SEQ	0x02
+#define GTP1_F_EXTHDR	0x04
+
 #endif