gtp: let userspace handle packets for invalid tunnels

enable userspace to send error replies for invalid tunnels

Acked-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: Andreas Schultz <aschultz@tpip.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index e11a1ea..bda0c64 100644 (file)
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -198,12 +198,12 @@ 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 (!pctx) {
                netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb);
-               return -1;
+               return 1;
        }
 
        if (!gtp_check_src_ms(skb, pctx, hdrlen)) {
                netdev_dbg(gtp->dev, "No PDP ctx for this MS\n");
-               return -1;
+               return 1;
        }
 
        /* Get rid of the GTP + UDP headers. */
@@ -247,12 +247,12 @@ static int gtp1u_udp_encap_recv(struct gtp_dev *gtp, struct sk_buff *skb,
        pctx = gtp1_pdp_find(gtp, ntohl(gtp1->tid));
        if (!pctx) {
                netdev_dbg(gtp->dev, "No PDP ctx to decap skb=%p\n", skb);
-               return -1;
+               return 1;
        }
 
        if (!gtp_check_src_ms(skb, pctx, hdrlen)) {
                netdev_dbg(gtp->dev, "No PDP ctx for this MS\n");
-               return -1;
+               return 1;
        }
 
        /* Get rid of the GTP + UDP headers. */