vxlan: ICMP error lookup handler
Export an encap_err_lookup() operation to match an ICMP error against a valid VNI. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1552,6 +1552,34 @@ drop:
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return 0;
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}
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/* Callback from net/ipv{4,6}/udp.c to check that we have a VNI for errors */
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static int vxlan_err_lookup(struct sock *sk, struct sk_buff *skb)
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{
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struct vxlan_dev *vxlan;
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struct vxlan_sock *vs;
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struct vxlanhdr *hdr;
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__be32 vni;
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if (skb->len < VXLAN_HLEN)
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return -EINVAL;
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hdr = vxlan_hdr(skb);
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if (!(hdr->vx_flags & VXLAN_HF_VNI))
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return -EINVAL;
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vs = rcu_dereference_sk_user_data(sk);
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if (!vs)
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return -ENOENT;
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vni = vxlan_vni(hdr->vx_vni);
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vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni);
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if (!vxlan)
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return -ENOENT;
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return 0;
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}
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static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
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{
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struct vxlan_dev *vxlan = netdev_priv(dev);
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@ -2948,6 +2976,7 @@ static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,
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tunnel_cfg.sk_user_data = vs;
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tunnel_cfg.encap_type = 1;
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tunnel_cfg.encap_rcv = vxlan_rcv;
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tunnel_cfg.encap_err_lookup = vxlan_err_lookup;
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tunnel_cfg.encap_destroy = NULL;
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tunnel_cfg.gro_receive = vxlan_gro_receive;
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tunnel_cfg.gro_complete = vxlan_gro_complete;
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