Subject: [PATCH 12/17] gtp: let userspace handle packets for invalid tunnels

From: Andreas Schultz <[email-masked]>
Date: Mon, 23 Jan 2017 12:57:01 +0100

enable userspace to send error replies for invalid tunnels

Signed-off-by: Andreas Schultz <[email-masked]>
---
 drivers/net/gtp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 868467d..290c400 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -186,7 +186,7 @@ static int gtp_rx(struct sk_buff *skb, struct pdp_ctx *pctx, unsigned int hdrlen
 
 	if (!gtp_check_src_ms(skb, pctx, hdrlen)) {
 		pr_debug("No PDP ctx for this MS\n");
-		return -1;
+		return 1;
 	}
 
 	/* Get rid of the GTP + UDP headers. */
@@ -236,7 +236,7 @@ static int gtp0_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb)
 	pctx = gtp0_pdp_find(gtp, be64_to_cpu(gtp0->tid));
 	if (IS_ERR(pctx)) {
 		netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb);
-		return -1;
+		return 1;
 	}
 
 	return gtp_rx(skb, pctx, hdrlen);
@@ -278,7 +278,7 @@ static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb)
 	pctx = gtp1_pdp_find(gtp, ntohl(gtp1->tid));
 	if (IS_ERR(pctx)) {
 		netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb);
-		return -1;
+		return 1;
 	}
 
 	return gtp_rx(skb, pctx, hdrlen);
-- 
2.10.2