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#ifndef _PACKET_PARSER_H
#define _PACKET_PARSER_H
#ifdef __cpluscplus
extern "C"
{
#endif
#include <stdint.h>
enum layer_type
{
// 数据链路层
LAYER_TYPE_ETHER = 1 << 0,
LAYER_TYPE_PPP = 1 << 1,
LAYER_TYPE_HDLC = 1 << 2,
LAYER_TYPE_L2 = (LAYER_TYPE_ETHER | LAYER_TYPE_PPP | LAYER_TYPE_HDLC),
// 数据链路层 -- 隧道
LAYER_TYPE_VLAN = 1 << 3,
LAYER_TYPE_PPPOE = 1 << 4,
LAYER_TYPE_MPLS = 1 << 5,
LAYER_TYPE_L2_TUN = (LAYER_TYPE_VLAN | LAYER_TYPE_PPPOE | LAYER_TYPE_MPLS),
// 网络层
LAYER_TYPE_IPV4 = 1 << 6,
LAYER_TYPE_IPV6 = 1 << 7,
LAYER_TYPE_L3 = (LAYER_TYPE_IPV4 | LAYER_TYPE_IPV6),
// 网络层 -- 隧道
// 传输层
LAYER_TYPE_UDP = 1 << 8,
LAYER_TYPE_TCP = 1 << 9,
LAYER_TYPE_L4 = (LAYER_TYPE_UDP | LAYER_TYPE_TCP),
// 传输层 -- 隧道
LAYER_TYPE_G_VXLAN = 1 << 10,
LAYER_TYPE_GTPV1_U = 1 << 11,
// ALL
LAYER_TYPE_ALL = (LAYER_TYPE_L2 | LAYER_TYPE_L2_TUN | LAYER_TYPE_L3 | LAYER_TYPE_L4 | LAYER_TYPE_G_VXLAN | LAYER_TYPE_GTPV1_U),
// UNKNOWN
LAYER_TYPE_UNKNOWN,
};
struct layer_record
{
enum layer_type type;
uint16_t hdr_offset;
uint16_t hdr_len;
uint16_t pld_len;
};
struct parser_result
{
struct layer_record layers[16];
uint16_t used;
uint16_t size;
};
struct packet_parser
{
struct parser_result result;
const void *packet_data;
uint16_t packet_len;
uint64_t packet_id;
};
void packet_parser_init(struct packet_parser *handler);
const void *packet_parser_parse(struct packet_parser *handler, const void *packet_data, uint16_t packet_len, uint64_t packet_id); // return most inner payload
const struct layer_record *packet_parser_get_most_inner(struct packet_parser *handler, enum layer_type type);
const struct layer_record *packet_parser_get_most_outer(struct packet_parser *handler, enum layer_type type);
// return 4: IPv4
// return 6: IPv6
uint8_t gtp_next_proto(const char *data);
#ifdef __cpluscplus
}
#endif
#endif
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