/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef _UAPI_MPTCP_H
#define _UAPI_MPTCP_H

#ifndef __KERNEL__
#include <netinet/in.h>		
#include <sys/socket.h>		
#endif

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

#define MPTCP_SUBFLOW_FLAG_MCAP_REM		_BITUL(0)
#define MPTCP_SUBFLOW_FLAG_MCAP_LOC		_BITUL(1)
#define MPTCP_SUBFLOW_FLAG_JOIN_REM		_BITUL(2)
#define MPTCP_SUBFLOW_FLAG_JOIN_LOC		_BITUL(3)
#define MPTCP_SUBFLOW_FLAG_BKUP_REM		_BITUL(4)
#define MPTCP_SUBFLOW_FLAG_BKUP_LOC		_BITUL(5)
#define MPTCP_SUBFLOW_FLAG_FULLY_ESTABLISHED	_BITUL(6)
#define MPTCP_SUBFLOW_FLAG_CONNECTED		_BITUL(7)
#define MPTCP_SUBFLOW_FLAG_MAPVALID		_BITUL(8)

enum {
	MPTCP_SUBFLOW_ATTR_UNSPEC,
	MPTCP_SUBFLOW_ATTR_TOKEN_REM,
	MPTCP_SUBFLOW_ATTR_TOKEN_LOC,
	MPTCP_SUBFLOW_ATTR_RELWRITE_SEQ,
	MPTCP_SUBFLOW_ATTR_MAP_SEQ,
	MPTCP_SUBFLOW_ATTR_MAP_SFSEQ,
	MPTCP_SUBFLOW_ATTR_SSN_OFFSET,
	MPTCP_SUBFLOW_ATTR_MAP_DATALEN,
	MPTCP_SUBFLOW_ATTR_FLAGS,
	MPTCP_SUBFLOW_ATTR_ID_REM,
	MPTCP_SUBFLOW_ATTR_ID_LOC,
	MPTCP_SUBFLOW_ATTR_PAD,
	__MPTCP_SUBFLOW_ATTR_MAX
};

#define MPTCP_SUBFLOW_ATTR_MAX (__MPTCP_SUBFLOW_ATTR_MAX - 1)


#define MPTCP_PM_NAME		"mptcp_pm"
#define MPTCP_PM_CMD_GRP_NAME	"mptcp_pm_cmds"
#define MPTCP_PM_EV_GRP_NAME	"mptcp_pm_events"
#define MPTCP_PM_VER		0x1


enum {
	MPTCP_PM_ATTR_UNSPEC,

	MPTCP_PM_ATTR_ADDR,				
	MPTCP_PM_ATTR_RCV_ADD_ADDRS,			
	MPTCP_PM_ATTR_SUBFLOWS,				
	MPTCP_PM_ATTR_TOKEN,				
	MPTCP_PM_ATTR_LOC_ID,				
	MPTCP_PM_ATTR_ADDR_REMOTE,			

	__MPTCP_PM_ATTR_MAX
};

#define MPTCP_PM_ATTR_MAX (__MPTCP_PM_ATTR_MAX - 1)

enum {
	MPTCP_PM_ADDR_ATTR_UNSPEC,

	MPTCP_PM_ADDR_ATTR_FAMILY,			
	MPTCP_PM_ADDR_ATTR_ID,				
	MPTCP_PM_ADDR_ATTR_ADDR4,			
	MPTCP_PM_ADDR_ATTR_ADDR6,			
	MPTCP_PM_ADDR_ATTR_PORT,			
	MPTCP_PM_ADDR_ATTR_FLAGS,			
	MPTCP_PM_ADDR_ATTR_IF_IDX,			

	__MPTCP_PM_ADDR_ATTR_MAX
};

#define MPTCP_PM_ADDR_ATTR_MAX (__MPTCP_PM_ADDR_ATTR_MAX - 1)

#define MPTCP_PM_EV_FLAG_DENY_JOIN_ID0		_BITUL(0)

#define MPTCP_PM_ADDR_FLAG_SIGNAL			(1 << 0)
#define MPTCP_PM_ADDR_FLAG_SUBFLOW			(1 << 1)
#define MPTCP_PM_ADDR_FLAG_BACKUP			(1 << 2)
#define MPTCP_PM_ADDR_FLAG_FULLMESH			(1 << 3)
#define MPTCP_PM_ADDR_FLAG_IMPLICIT			(1 << 4)
#define MPTCP_PM_ADDR_FLAGS_MASK			GENMASK(4, 0)

enum {
	MPTCP_PM_CMD_UNSPEC,

	MPTCP_PM_CMD_ADD_ADDR,
	MPTCP_PM_CMD_DEL_ADDR,
	MPTCP_PM_CMD_GET_ADDR,
	MPTCP_PM_CMD_FLUSH_ADDRS,
	MPTCP_PM_CMD_SET_LIMITS,
	MPTCP_PM_CMD_GET_LIMITS,
	MPTCP_PM_CMD_SET_FLAGS,
	MPTCP_PM_CMD_ANNOUNCE,
	MPTCP_PM_CMD_REMOVE,
	MPTCP_PM_CMD_SUBFLOW_CREATE,
	MPTCP_PM_CMD_SUBFLOW_DESTROY,

	__MPTCP_PM_CMD_AFTER_LAST
};

#define MPTCP_INFO_FLAG_FALLBACK		_BITUL(0)
#define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED	_BITUL(1)

struct mptcp_info {
	__u8	mptcpi_subflows;
	__u8	mptcpi_add_addr_signal;
	__u8	mptcpi_add_addr_accepted;
	__u8	mptcpi_subflows_max;
	__u8	mptcpi_add_addr_signal_max;
	__u8	mptcpi_add_addr_accepted_max;
	__u32	mptcpi_flags;
	__u32	mptcpi_token;
	__u64	mptcpi_write_seq;
	__u64	mptcpi_snd_una;
	__u64	mptcpi_rcv_nxt;
	__u8	mptcpi_local_addr_used;
	__u8	mptcpi_local_addr_max;
	__u8	mptcpi_csum_enabled;
};


enum mptcp_event_type {
	MPTCP_EVENT_UNSPEC = 0,
	MPTCP_EVENT_CREATED = 1,
	MPTCP_EVENT_ESTABLISHED = 2,
	MPTCP_EVENT_CLOSED = 3,

	MPTCP_EVENT_ANNOUNCED = 6,
	MPTCP_EVENT_REMOVED = 7,

	MPTCP_EVENT_SUB_ESTABLISHED = 10,
	MPTCP_EVENT_SUB_CLOSED = 11,

	MPTCP_EVENT_SUB_PRIORITY = 13,
};

enum mptcp_event_attr {
	MPTCP_ATTR_UNSPEC = 0,

	MPTCP_ATTR_TOKEN,	
	MPTCP_ATTR_FAMILY,	
	MPTCP_ATTR_LOC_ID,	
	MPTCP_ATTR_REM_ID,	
	MPTCP_ATTR_SADDR4,	
	MPTCP_ATTR_SADDR6,	
	MPTCP_ATTR_DADDR4,	
	MPTCP_ATTR_DADDR6,	
	MPTCP_ATTR_SPORT,	
	MPTCP_ATTR_DPORT,	
	MPTCP_ATTR_BACKUP,	
	MPTCP_ATTR_ERROR,	
	MPTCP_ATTR_FLAGS,	
	MPTCP_ATTR_TIMEOUT,	
	MPTCP_ATTR_IF_IDX,	
	MPTCP_ATTR_RESET_REASON,
	MPTCP_ATTR_RESET_FLAGS, 
	MPTCP_ATTR_SERVER_SIDE,	

	__MPTCP_ATTR_AFTER_LAST
};

#define MPTCP_ATTR_MAX (__MPTCP_ATTR_AFTER_LAST - 1)


#define MPTCP_RST_EUNSPEC	0
#define MPTCP_RST_EMPTCP	1
#define MPTCP_RST_ERESOURCE	2
#define MPTCP_RST_EPROHIBIT	3
#define MPTCP_RST_EWQ2BIG	4
#define MPTCP_RST_EBADPERF	5
#define MPTCP_RST_EMIDDLEBOX	6

struct mptcp_subflow_data {
	__u32		size_subflow_data;		
	__u32		num_subflows;			
	__u32		size_kernel;			
	__u32		size_user;			
} __attribute__((aligned(8)));

struct mptcp_subflow_addrs {
	union {
		__kernel_sa_family_t sa_family;
		struct sockaddr sa_local;
		struct sockaddr_in sin_local;
		struct sockaddr_in6 sin6_local;
		struct __kernel_sockaddr_storage ss_local;
	};
	union {
		struct sockaddr sa_remote;
		struct sockaddr_in sin_remote;
		struct sockaddr_in6 sin6_remote;
		struct __kernel_sockaddr_storage ss_remote;
	};
};


#define MPTCP_INFO		1
#define MPTCP_TCPINFO		2
#define MPTCP_SUBFLOW_ADDRS	3

#endif 
