-{
- struct net *net = ovs_dp_get_net(vport->dp);
- struct lisp_port *lisp_port = lisp_vport(vport);
- struct udphdr *udph = udp_hdr(skb);
- struct lisphdr *lisph = (struct lisphdr *)(udph + 1);
- const struct ovs_key_ipv4_tunnel *tun_key = &OVS_CB(skb)->tun_info->tunnel;
-
- udph->dest = lisp_port->dst_port;
- udph->source = htons(get_src_port(net, skb));
- udph->check = 0;
- udph->len = htons(skb->len - skb_transport_offset(skb));
-
- lisph->nonce_present = 0; /* We don't support echo nonce algorithm */
- lisph->locator_status_bits_present = 1; /* Set LSB */
- lisph->solicit_echo_nonce = 0; /* No echo noncing */
- lisph->map_version_present = 0; /* No mapping versioning, nonce instead */
- lisph->instance_id_present = 1; /* Store the tun_id as Instance ID */
- lisph->reserved_flags = 0; /* Reserved flags, set to 0 */
-
- lisph->u1.nonce[0] = 0;
- lisph->u1.nonce[1] = 0;
- lisph->u1.nonce[2] = 0;
-
- tunnel_id_to_instance_id(tun_key->tun_id, &lisph->u2.word2.instance_id[0]);
- lisph->u2.word2.locator_status_bits = 1;
-}
-
-/* Called with rcu_read_lock and BH disabled. */
-static int lisp_rcv(struct sock *sk, struct sk_buff *skb)
-{
- struct lisp_port *lisp_port;
- struct lisphdr *lisph;
- struct iphdr *iph, *inner_iph;
- struct ovs_tunnel_info tun_info;
- __be64 key;
- struct ethhdr *ethh;
- __be16 protocol;
-
- lisp_port = lisp_find_port(dev_net(skb->dev), udp_hdr(skb)->dest);
- if (unlikely(!lisp_port))
- goto error;
-
- if (iptunnel_pull_header(skb, LISP_HLEN, 0))
- goto error;
-
- lisph = lisp_hdr(skb);
-
- if (lisph->instance_id_present != 1)
- key = 0;
- else
- key = instance_id_to_tunnel_id(&lisph->u2.word2.instance_id[0]);
-
- /* Save outer tunnel values */
- iph = ip_hdr(skb);
- ovs_flow_tun_info_init(&tun_info, iph, key, TUNNEL_KEY, NULL, 0);
-
- /* Drop non-IP inner packets */
- inner_iph = (struct iphdr *)(lisph + 1);
- switch (inner_iph->version) {
- case 4:
- protocol = htons(ETH_P_IP);
- break;
- case 6:
- protocol = htons(ETH_P_IPV6);
- break;
- default:
- goto error;
- }
- skb->protocol = protocol;
-
- /* Add Ethernet header */
- ethh = (struct ethhdr *)skb_push(skb, ETH_HLEN);
- memset(ethh, 0, ETH_HLEN);
- ethh->h_dest[0] = 0x02;
- ethh->h_source[0] = 0x02;
- ethh->h_proto = protocol;
-
- ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
-
- ovs_vport_receive(vport_from_priv(lisp_port), skb, &tun_info);
- goto out;
-
-error:
- kfree_skb(skb);
-out:
- return 0;
-}
-
-/* Arbitrary value. Irrelevant as long as it's not 0 since we set the handler. */
-#define UDP_ENCAP_LISP 1
-static int lisp_socket_init(struct lisp_port *lisp_port, struct net *net)
-{
- struct sockaddr_in sin;
- int err;
-
- err = sock_create_kern(AF_INET, SOCK_DGRAM, 0,
- &lisp_port->lisp_rcv_socket);
- if (err)
- goto error;
-
- /* release net ref. */
- sk_change_net(lisp_port->lisp_rcv_socket->sk, net);
-
- sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = htonl(INADDR_ANY);
- sin.sin_port = lisp_port->dst_port;
-
- err = kernel_bind(lisp_port->lisp_rcv_socket, (struct sockaddr *)&sin,
- sizeof(struct sockaddr_in));
- if (err)
- goto error_sock;
-
- udp_sk(lisp_port->lisp_rcv_socket->sk)->encap_type = UDP_ENCAP_LISP;
- udp_sk(lisp_port->lisp_rcv_socket->sk)->encap_rcv = lisp_rcv;
-
- udp_encap_enable();
-
- return 0;
-
-error_sock:
- sk_release_kernel(lisp_port->lisp_rcv_socket->sk);
-error:
- pr_warn("cannot register lisp protocol handler: %d\n", err);
- return err;
-}
-
-static int lisp_get_options(const struct vport *vport, struct sk_buff *skb)