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#ifndef __L2TP_PROT_H
#define __L2TP_PROT_H
#include <stdint.h>
#define L2TP_PORT 1701
#define L2TP_FLAG_T 0x8000
#define L2TP_FLAG_L 0x4000
#define L2TP_FLAG_S 0x0800
#define L2TP_FLAG_O 0x0200
#define L2TP_FLAG_P 0x0100
#define L2TP_VER_MASK 0x000f
struct l2tp_hdr_t
{
uint16_t flags;
uint16_t length;
union {
struct {
uint16_t tid;
uint16_t sid;
};
uint32_t cid;
};
uint16_t Ns;
uint16_t Nr;
} __attribute__((packed));
#define L2TP_AVP_FLAG_M 0x8000
#define L2TP_AVP_FLAG_H 0x4000
#define L2TP_AVP_LEN_MASK 0x03ff
struct l2tp_avp_t
{
uint16_t flags;
uint16_t vendor;
uint16_t type;
uint8_t val[0];
} __attribute__((packed));
struct l2tp_avp_result_code
{
uint16_t result_code;
uint16_t error_code;
char error_msg[0];
} __attribute__((packed));
#endif
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