rte_vxlan.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018-2019 Intel Corporation
 */

#ifndef _RTE_VXLAN_H_
#define _RTE_VXLAN_H_

#include <stdint.h>

#include <rte_byteorder.h>
#include <rte_udp.h>

#define RTE_VXLAN_DEFAULT_PORT 4789

#define RTE_VXLAN_GPE_DEFAULT_PORT 4790

__extension__ /* no named member in struct */
struct rte_vxlan_hdr {
    union {
        rte_be32_t vx_flags; 
        struct {
            union {
                uint8_t flags; 
                struct {
#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
                    uint8_t flag_g:1,     
                        flag_rsvd:1,  /*   Reserved. */
                        flag_ver:2,   
                        flag_i:1,     
                        flag_p:1,     
                        flag_b:1,     
                        flag_o:1;     
#elif RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
                    uint8_t flag_o:1,
                        flag_b:1,
                        flag_p:1,
                        flag_i:1,
                        flag_ver:2,
                        flag_rsvd:1,
                        flag_g:1;
#endif
                } __rte_packed;
            }; /* end of 1st byte */
            union {
                uint8_t rsvd0[3]; /* Reserved for extensions. */
                struct {
#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
                    uint8_t rsvd0_gbp1:1, /*   Reserved. */
                        flag_d:1,     
                        rsvd0_gbp2:2, /*   Reserved. */
                        flag_a:1,     
                        rsvd0_gbp3:3; /*   Reserved. */
#elif RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
                    uint8_t rsvd0_gbp3:3,
                        flag_a:1,
                        rsvd0_gbp2:2,
                        flag_d:1,
                        rsvd0_gbp1:1;
#endif
                    union {
                        uint16_t policy_id; 
                        struct {
                            uint8_t rsvd0_gpe; /* Reserved. */
                            uint8_t proto; 
                                /* 0x01 : IPv4
                                 * 0x02 : IPv6
                                 * 0x03 : Ethernet
                                 * 0x04 : Network Service Header
                                 */
                        } __rte_packed;
                    };
                } __rte_packed;
            };
        } __rte_packed;
    }; /* end of 1st 32-bit word */
    union {
        rte_be32_t vx_vni; 
        struct {
            uint8_t    vni[3];   
            union {
                uint8_t    rsvd1;        
                uint8_t    last_rsvd;    
            };
        } __rte_packed;
    }; /* end of 2nd 32-bit word */
} __rte_packed;

#define RTE_ETHER_VXLAN_HLEN \
    (sizeof(struct rte_udp_hdr) + sizeof(struct rte_vxlan_hdr))


__extension__ /* no named member in struct */
struct rte_vxlan_gpe_hdr {
    union {
        struct {
            uint8_t vx_flags;    
            uint8_t reserved[2]; 
            uint8_t protocol;    
            rte_be32_t vx_vni;   
        };
        struct {
            uint8_t flags;    
            uint8_t rsvd0[2]; 
            uint8_t proto;    
            uint8_t vni[3];   
            uint8_t rsvd1;    
        };
    };
} __rte_packed;

#define RTE_ETHER_VXLAN_GPE_HLEN (sizeof(struct rte_udp_hdr) + \
        sizeof(struct rte_vxlan_gpe_hdr))

/* VXLAN-GPE next protocol types */
#define RTE_VXLAN_GPE_TYPE_IPV4 1 
#define RTE_VXLAN_GPE_TYPE_IPV6 2 
#define RTE_VXLAN_GPE_TYPE_ETH  3 
#define RTE_VXLAN_GPE_TYPE_NSH  4 
#define RTE_VXLAN_GPE_TYPE_MPLS 5 
#define RTE_VXLAN_GPE_TYPE_GBP  6 
#define RTE_VXLAN_GPE_TYPE_VBNG 7 
#endif /* RTE_VXLAN_H_ */