2 #define __NET_VXLAN_H 1
5 #include <linux/ipv6.h>
6 #include <linux/if_vlan.h>
7 #include <linux/skbuff.h>
8 #include <linux/netdevice.h>
11 #define VNI_HASH_BITS 10
12 #define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
14 /* VXLAN protocol header */
21 typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);
23 /* per UDP socket information */
25 struct hlist_node hlist;
28 struct work_struct del_work;
31 struct hlist_head vni_list[VNI_HASH_SIZE];
33 struct udp_offload udp_offloads;
36 #define VXLAN_F_LEARN 0x01
37 #define VXLAN_F_PROXY 0x02
38 #define VXLAN_F_RSC 0x04
39 #define VXLAN_F_L2MISS 0x08
40 #define VXLAN_F_L3MISS 0x10
41 #define VXLAN_F_IPV6 0x20
42 #define VXLAN_F_UDP_CSUM 0x40
43 #define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
44 #define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
46 struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
47 vxlan_rcv_t *rcv, void *data,
48 bool no_share, u32 flags);
50 void vxlan_sock_release(struct vxlan_sock *vs);
52 int vxlan_xmit_skb(struct vxlan_sock *vs,
53 struct rtable *rt, struct sk_buff *skb,
54 __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
55 __be16 src_port, __be16 dst_port, __be32 vni, bool xnet);
57 static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
58 netdev_features_t features)
62 if (!skb->encapsulation)
65 switch (vlan_get_protocol(skb)) {
67 l4_hdr = ip_hdr(skb)->protocol;
69 case htons(ETH_P_IPV6):
70 l4_hdr = ipv6_hdr(skb)->nexthdr;
76 if ((l4_hdr == IPPROTO_UDP) &&
77 (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
78 skb->inner_protocol != htons(ETH_P_TEB) ||
79 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
80 sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
81 return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);
86 /* IP header + UDP + VXLAN + Ethernet header */
87 #define VXLAN_HEADROOM (20 + 8 + 8 + 14)
88 /* IPv6 header + UDP + VXLAN + Ethernet header */
89 #define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
91 #if IS_ENABLED(CONFIG_VXLAN)
92 void vxlan_get_rx_port(struct net_device *netdev);
94 static inline void vxlan_get_rx_port(struct net_device *netdev)