path: root/net/ipv4/ip_gre.c
diff options
authorLorenzo Bianconi <lorenzo.bianconi@redhat.com>2019-01-18 12:05:39 +0100
committerDavid S. Miller <davem@davemloft.net>2019-01-22 11:52:17 -0800
commitcb73ee40b1b381eaf3749e6dbeed567bb38e5258 (patch)
tree4a46c80cac3f7bb0f044f1cbf2d73a66129a9456 /net/ipv4/ip_gre.c
parentnet: sun: cassini: Cleanup license conflict (diff)
net: ip_gre: use erspan key field for tunnel lookup
Use ERSPAN key header field as tunnel key in gre_parse_header routine since ERSPAN protocol sets the key field of the external GRE header to 0 resulting in a tunnel lookup fail in ip6gre_err. In addition remove key field parsing and pskb_may_pull check in erspan_rcv and ip6erspan_rcv Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support") Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
1 files changed, 0 insertions, 9 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index b1a74d80d868..20a64fe6254b 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -268,20 +268,11 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi,
int len;
itn = net_generic(net, erspan_net_id);
- len = gre_hdr_len + sizeof(*ershdr);
- /* Check based hdr len */
- if (unlikely(!pskb_may_pull(skb, len)))
iph = ip_hdr(skb);
ershdr = (struct erspan_base_hdr *)(skb->data + gre_hdr_len);
ver = ershdr->ver;
- /* The original GRE header does not have key field,
- * Use ERSPAN 10-bit session ID as key.
- */
- tpi->key = cpu_to_be32(get_session_id(ershdr));
tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex,
tpi->flags | TUNNEL_KEY,
iph->saddr, iph->daddr, tpi->key);