vxlan.h

/*
 * Copyright (c) 2022 Baidu.com, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Author: Jianzhang Peng (pengjianzhang@baidu.com)
 */

#ifndef __VXLAN_H
#define __VXLAN_H

#include "eth.h"
#include "ip.h"
#include "udp.h"
#include "ip_range.h"

struct vxlan {
    int vni;
    struct eth_addr inner_smac;
    struct eth_addr inner_dmac;
    struct ip_range vtep_local;
    struct ip_range vtep_remote;
};

struct vxlan_header {
    uint32_t flags:8;
    uint32_t reserved0:24;
    uint32_t vni:24;
    uint32_t reserved1:8;
};

struct vxlan_headers {
    struct eth_hdr eh;
    struct iphdr iph;
    struct udphdr uh;
    struct vxlan_header vxh;
} __attribute__((__packed__));

#define VXLAN_HEADERS_SIZE  sizeof(struct vxlan_headers)
#define VNI_MAX             0xffffff
#define VXLAN_PORT          4789
#define VXLAN_SPORT         6666
#define VXLAN_HTON(vni)     htonl((vni) << 8)

struct mbuf_data;
struct work_space;
int vxlan_encapsulate(struct mbuf_data *mdata, struct work_space *ws);

#endif