/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */


#ifndef _UAPI_LINUX_L2TP_H_
#define _UAPI_LINUX_L2TP_H_

#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/in6.h>


#define __SOCK_SIZE__	16		
struct sockaddr_l2tpip {
	
	__kernel_sa_family_t l2tp_family; 
	__be16		l2tp_unused;	
	struct in_addr	l2tp_addr;	

	__u32		l2tp_conn_id;	

	
	unsigned char	__pad[__SOCK_SIZE__ -
			      sizeof(__kernel_sa_family_t) -
			      sizeof(__be16) - sizeof(struct in_addr) -
			      sizeof(__u32)];
};


struct sockaddr_l2tpip6 {
	
	__kernel_sa_family_t l2tp_family; 
	__be16		l2tp_unused;	
	__be32		l2tp_flowinfo;	
	struct in6_addr	l2tp_addr;	
	__u32		l2tp_scope_id;	
	__u32		l2tp_conn_id;	
};




enum {
	L2TP_CMD_NOOP,
	L2TP_CMD_TUNNEL_CREATE,
	L2TP_CMD_TUNNEL_DELETE,
	L2TP_CMD_TUNNEL_MODIFY,
	L2TP_CMD_TUNNEL_GET,
	L2TP_CMD_SESSION_CREATE,
	L2TP_CMD_SESSION_DELETE,
	L2TP_CMD_SESSION_MODIFY,
	L2TP_CMD_SESSION_GET,
	__L2TP_CMD_MAX,
};

#define L2TP_CMD_MAX			(__L2TP_CMD_MAX - 1)


enum {
	L2TP_ATTR_NONE,			
	L2TP_ATTR_PW_TYPE,		
	L2TP_ATTR_ENCAP_TYPE,		
	L2TP_ATTR_OFFSET,		
	L2TP_ATTR_DATA_SEQ,		
	L2TP_ATTR_L2SPEC_TYPE,		
	L2TP_ATTR_L2SPEC_LEN,		
	L2TP_ATTR_PROTO_VERSION,	
	L2TP_ATTR_IFNAME,		
	L2TP_ATTR_CONN_ID,		
	L2TP_ATTR_PEER_CONN_ID,		
	L2TP_ATTR_SESSION_ID,		
	L2TP_ATTR_PEER_SESSION_ID,	
	L2TP_ATTR_UDP_CSUM,		
	L2TP_ATTR_VLAN_ID,		
	L2TP_ATTR_COOKIE,		
	L2TP_ATTR_PEER_COOKIE,		
	L2TP_ATTR_DEBUG,		
	L2TP_ATTR_RECV_SEQ,		
	L2TP_ATTR_SEND_SEQ,		
	L2TP_ATTR_LNS_MODE,		
	L2TP_ATTR_USING_IPSEC,		
	L2TP_ATTR_RECV_TIMEOUT,		
	L2TP_ATTR_FD,			
	L2TP_ATTR_IP_SADDR,		
	L2TP_ATTR_IP_DADDR,		
	L2TP_ATTR_UDP_SPORT,		
	L2TP_ATTR_UDP_DPORT,		
	L2TP_ATTR_MTU,			
	L2TP_ATTR_MRU,			
	L2TP_ATTR_STATS,		
	L2TP_ATTR_IP6_SADDR,		
	L2TP_ATTR_IP6_DADDR,		
	L2TP_ATTR_UDP_ZERO_CSUM6_TX,	
	L2TP_ATTR_UDP_ZERO_CSUM6_RX,	
	L2TP_ATTR_PAD,
	__L2TP_ATTR_MAX,
};

#define L2TP_ATTR_MAX			(__L2TP_ATTR_MAX - 1)


enum {
	L2TP_ATTR_STATS_NONE,		
	L2TP_ATTR_TX_PACKETS,		
	L2TP_ATTR_TX_BYTES,		
	L2TP_ATTR_TX_ERRORS,		
	L2TP_ATTR_RX_PACKETS,		
	L2TP_ATTR_RX_BYTES,		
	L2TP_ATTR_RX_SEQ_DISCARDS,	
	L2TP_ATTR_RX_OOS_PACKETS,	
	L2TP_ATTR_RX_ERRORS,		
	L2TP_ATTR_STATS_PAD,
	L2TP_ATTR_RX_COOKIE_DISCARDS,	
	L2TP_ATTR_RX_INVALID,		
	__L2TP_ATTR_STATS_MAX,
};

#define L2TP_ATTR_STATS_MAX		(__L2TP_ATTR_STATS_MAX - 1)

enum l2tp_pwtype {
	L2TP_PWTYPE_NONE = 0x0000,
	L2TP_PWTYPE_ETH_VLAN = 0x0004,
	L2TP_PWTYPE_ETH = 0x0005,
	L2TP_PWTYPE_PPP = 0x0007,
	L2TP_PWTYPE_PPP_AC = 0x0008,
	L2TP_PWTYPE_IP = 0x000b,
	__L2TP_PWTYPE_MAX
};

enum l2tp_l2spec_type {
	L2TP_L2SPECTYPE_NONE,
	L2TP_L2SPECTYPE_DEFAULT,
};

enum l2tp_encap_type {
	L2TP_ENCAPTYPE_UDP,
	L2TP_ENCAPTYPE_IP,
};


enum l2tp_seqmode {
	L2TP_SEQ_NONE = 0,
	L2TP_SEQ_IP = 1,
	L2TP_SEQ_ALL = 2,
};


enum l2tp_debug_flags {
	L2TP_MSG_DEBUG		= (1 << 0),
	L2TP_MSG_CONTROL	= (1 << 1),
	L2TP_MSG_SEQ		= (1 << 2),
	L2TP_MSG_DATA		= (1 << 3),
};


#define L2TP_GENL_NAME		"l2tp"
#define L2TP_GENL_VERSION	0x1
#define L2TP_GENL_MCGROUP       "l2tp"

#endif 
