99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
#ifndef __NET_VXLAN_H
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#define __NET_VXLAN_H 1
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/if_vlan.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/udp.h>
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#define VNI_HASH_BITS 10
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#define VNI_HASH_SIZE (1<<VNI_HASH_BITS)
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/* VXLAN protocol header */
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struct vxlanhdr {
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__be32 vx_flags;
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__be32 vx_vni;
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};
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struct vxlan_sock;
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typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);
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/* per UDP socket information */
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struct vxlan_sock {
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struct hlist_node hlist;
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vxlan_rcv_t *rcv;
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void *data;
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struct work_struct del_work;
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struct socket *sock;
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struct rcu_head rcu;
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struct hlist_head vni_list[VNI_HASH_SIZE];
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atomic_t refcnt;
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struct udp_offload udp_offloads;
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};
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#define VXLAN_F_LEARN 0x01
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#define VXLAN_F_PROXY 0x02
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#define VXLAN_F_RSC 0x04
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#define VXLAN_F_L2MISS 0x08
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#define VXLAN_F_L3MISS 0x10
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#define VXLAN_F_IPV6 0x20
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#define VXLAN_F_UDP_CSUM 0x40
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#define VXLAN_F_UDP_ZERO_CSUM6_TX 0x80
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#define VXLAN_F_UDP_ZERO_CSUM6_RX 0x100
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struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
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vxlan_rcv_t *rcv, void *data,
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bool no_share, u32 flags);
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void vxlan_sock_release(struct vxlan_sock *vs);
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int vxlan_xmit_skb(struct vxlan_sock *vs,
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struct rtable *rt, struct sk_buff *skb,
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__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
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__be16 src_port, __be16 dst_port, __be32 vni, bool xnet);
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static inline netdev_features_t vxlan_features_check(struct sk_buff *skb,
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netdev_features_t features)
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{
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u8 l4_hdr = 0;
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if (!skb->encapsulation)
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return features;
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switch (vlan_get_protocol(skb)) {
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case htons(ETH_P_IP):
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l4_hdr = ip_hdr(skb)->protocol;
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break;
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case htons(ETH_P_IPV6):
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l4_hdr = ipv6_hdr(skb)->nexthdr;
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break;
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default:
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return features;;
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}
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if ((l4_hdr == IPPROTO_UDP) &&
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(skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
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skb->inner_protocol != htons(ETH_P_TEB) ||
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(skb_inner_mac_header(skb) - skb_transport_header(skb) !=
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sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
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return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);
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return features;
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}
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/* IP header + UDP + VXLAN + Ethernet header */
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#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
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/* IPv6 header + UDP + VXLAN + Ethernet header */
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#define VXLAN6_HEADROOM (40 + 8 + 8 + 14)
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#if IS_ENABLED(CONFIG_VXLAN)
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void vxlan_get_rx_port(struct net_device *netdev);
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#else
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static inline void vxlan_get_rx_port(struct net_device *netdev)
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{
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}
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#endif
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#endif
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