#ifndef _G_VXLAN_H
#define _G_VXLAN_H

#ifdef __cpluscplus
extern "C"
{
#endif

struct g_vxlan
{
	unsigned char flags;
	unsigned char reserved[3];

	// VNI 3 Bytes
	unsigned char vlan_id_half_high;

	unsigned char link_layer_type : 4; // 二层报文封装格式
	unsigned char vlan_id_half_low : 4;

	unsigned int dir_is_e2i : 1;
	unsigned int traffic_is_decrypted : 1;
	unsigned int sf_index : 5; // max value 32
	unsigned int online_test : 1;

	// Reserved 1 Bytes
	unsigned int r7 : 1;
	unsigned int r6 : 1;
	unsigned int r5 : 1;
	unsigned int r4 : 1;
	unsigned int vni_flag : 1;
	unsigned int r2 : 1;
	unsigned int r1 : 1;
	unsigned int r0 : 1;
} __attribute__((__packed__));

void g_vxlan_set_packet_dir(struct g_vxlan *hdr, int dir_is_e2i);
void g_vxlan_set_sf_index(struct g_vxlan *hdr, int sf_index);
void g_vxlan_set_traffic_type(struct g_vxlan *hdr, int traffic_is_decrypted);

int g_vxlan_get_packet_dir(struct g_vxlan *hdr);
int g_vxlan_get_sf_index(struct g_vxlan *hdr);
int g_vxlan_get_traffic_type(struct g_vxlan *hdr);

// return  0 : success
// return -1 : error
int g_vxlan_decode(struct g_vxlan **g_vxlan_hd, const char *raw_data, int raw_len);

#ifdef __cpluscplus
}
#endif

#endif