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#ifndef __L2TP_H
#define __L2TP_H
#include <netinet/in.h>
#include "list.h"
#include "l2tp_prot.h"
#define ATTR_TYPE_NONE 0
#define ATTR_TYPE_INT16 1
#define ATTR_TYPE_INT32 2
#define ATTR_TYPE_INT64 3
#define ATTR_TYPE_OCTETS 4
#define ATTR_TYPE_STRING 5
#define L2TP_MAX_PACKET_SIZE 65536
#define L2TP_V2_PROTOCOL_VERSION ( 1 << 8 | 0 )
#define L2TP_DATASEQ_ALLOW -1
#define L2TP_DATASEQ_DENY 0
#define L2TP_DATASEQ_PREFER 1
#define L2TP_DATASEQ_REQUIRE 2
typedef union
{
uint32_t uint32;
int32_t int32;
uint16_t uint16;
int16_t int16;
uint64_t uint64;
uint8_t *octets;
char *string;
} l2tp_value_t;
struct l2tp_dict_attr_t
{
struct list_head entry;
const char *name;
int id;
int type;
int M;
int H;
struct list_head values;
};
struct l2tp_dict_value_t
{
struct list_head entry;
const char *name;
l2tp_value_t val;
};
struct l2tp_attr_t
{
struct list_head entry;
struct l2tp_dict_attr_t *attr;
int M:1;
int H:1;
int length;
l2tp_value_t val;
};
struct l2tp_packet_t
{
struct list_head entry;
struct sockaddr_in addr;
struct l2tp_hdr_t hdr;
struct list_head attrs;
struct l2tp_attr_t *last_RV;
const char *secret;
size_t secret_len;
int hide_avps;
};
extern int conf_verbose;
extern int conf_avp_permissive;
struct l2tp_dict_attr_t *l2tp_dict_find_attr_by_name(const char *name);
struct l2tp_dict_attr_t *l2tp_dict_find_attr_by_id(int id);
const struct l2tp_dict_value_t *l2tp_dict_find_value(const struct l2tp_dict_attr_t *attr,
l2tp_value_t val);
int l2tp_recv(int fd, struct l2tp_packet_t **, struct in_pktinfo *,
const char *secret, size_t secret_len);
void l2tp_packet_free(struct l2tp_packet_t *);
void l2tp_packet_print(const struct l2tp_packet_t *,
void (*print)(const char *fmt, ...));
struct l2tp_packet_t *l2tp_packet_alloc(int ver, int msg_type,
const struct sockaddr_in *addr, int H,
const char *secret, size_t secret_len);
int l2tp_packet_send(int sock, struct l2tp_packet_t *);
int l2tp_packet_add_int16(struct l2tp_packet_t *pack, int id, int16_t val, int M);
int l2tp_packet_add_int32(struct l2tp_packet_t *pack, int id, int32_t val, int M);
int l2tp_packet_add_int64(struct l2tp_packet_t *pack, int id, int64_t val, int M);
int l2tp_packet_add_string(struct l2tp_packet_t *pack, int id, const char *val, int M);
int l2tp_packet_add_octets(struct l2tp_packet_t *pack, int id, const uint8_t *val, int size, int M);
void l2tp_nl_create_tunnel(int fd, int tid, int peer_tid);
void l2tp_nl_create_session(int tid, int sid, int peer_sid);
void l2tp_nl_delete_tunnel(int tid);
#endif
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