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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef _MPTCP_H
#define _MPTCP_H
#include <netinet/in.h> /* for sockaddr_in and sockaddr_in6 */
#include <sys/socket.h> /* for struct sockaddr */
#include <linux/const.h>
#include <linux/types.h>
#include <linux/in.h> /* for sockaddr_in */
#include <linux/in6.h> /* for sockaddr_in6 */
#include <linux/socket.h> /* for sockaddr_storage and sa_family */
#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)
/* netlink interface */
#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
/*
* ATTR types defined for MPTCP
*/
enum {
MPTCP_PM_ATTR_UNSPEC,
MPTCP_PM_ATTR_ADDR, /* nested address */
MPTCP_PM_ATTR_RCV_ADD_ADDRS, /* u32 */
MPTCP_PM_ATTR_SUBFLOWS, /* u32 */
MPTCP_PM_ATTR_TOKEN, /* u32 */
MPTCP_PM_ATTR_LOC_ID, /* u8 */
MPTCP_PM_ATTR_ADDR_REMOTE, /* nested address */
__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, /* u16 */
MPTCP_PM_ADDR_ATTR_ID, /* u8 */
MPTCP_PM_ADDR_ATTR_ADDR4, /* struct in_addr */
MPTCP_PM_ADDR_ATTR_ADDR6, /* struct in6_addr */
MPTCP_PM_ADDR_ATTR_PORT, /* u16 */
MPTCP_PM_ADDR_ATTR_FLAGS, /* u32 */
MPTCP_PM_ADDR_ATTR_IF_IDX, /* s32 */
__MPTCP_PM_ADDR_ATTR_MAX
};
#define MPTCP_PM_ADDR_ATTR_MAX (__MPTCP_PM_ADDR_ATTR_MAX - 1)
#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)
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;
};
/*
* MPTCP_EVENT_CREATED: token, family, saddr4 | saddr6, daddr4 | daddr6,
* sport, dport
* A new MPTCP connection has been created. It is the good time to allocate
* memory and send ADD_ADDR if needed. Depending on the traffic-patterns
* it can take a long time until the MPTCP_EVENT_ESTABLISHED is sent.
*
* MPTCP_EVENT_ESTABLISHED: token, family, saddr4 | saddr6, daddr4 | daddr6,
* sport, dport
* A MPTCP connection is established (can start new subflows).
*
* MPTCP_EVENT_CLOSED: token
* A MPTCP connection has stopped.
*
* MPTCP_EVENT_ANNOUNCED: token, rem_id, family, daddr4 | daddr6 [, dport]
* A new address has been announced by the peer.
*
* MPTCP_EVENT_REMOVED: token, rem_id
* An address has been lost by the peer.
*
* MPTCP_EVENT_SUB_ESTABLISHED: token, family, loc_id, rem_id,
* saddr4 | saddr6, daddr4 | daddr6, sport,
* dport, backup, if_idx [, error]
* A new subflow has been established. 'error' should not be set.
*
* MPTCP_EVENT_SUB_CLOSED: token, family, loc_id, rem_id, saddr4 | saddr6,
* daddr4 | daddr6, sport, dport, backup, if_idx
* [, error]
* A subflow has been closed. An error (copy of sk_err) could be set if an
* error has been detected for this subflow.
*
* MPTCP_EVENT_SUB_PRIORITY: token, family, loc_id, rem_id, saddr4 | saddr6,
* daddr4 | daddr6, sport, dport, backup, if_idx
* [, error]
* The priority of a subflow has changed. 'error' should not be set.
*
* MPTCP_EVENT_LISTENER_CREATED: family, sport, saddr4 | saddr6
* A new PM listener is created.
*
* MPTCP_EVENT_LISTENER_CLOSED: family, sport, saddr4 | saddr6
* A PM listener is closed.
*/
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,
MPTCP_EVENT_LISTENER_CREATED = 15,
MPTCP_EVENT_LISTENER_CLOSED = 16,
};
enum mptcp_event_attr {
MPTCP_ATTR_UNSPEC = 0,
MPTCP_ATTR_TOKEN, /* u32 */
MPTCP_ATTR_FAMILY, /* u16 */
MPTCP_ATTR_LOC_ID, /* u8 */
MPTCP_ATTR_REM_ID, /* u8 */
MPTCP_ATTR_SADDR4, /* be32 */
MPTCP_ATTR_SADDR6, /* struct in6_addr */
MPTCP_ATTR_DADDR4, /* be32 */
MPTCP_ATTR_DADDR6, /* struct in6_addr */
MPTCP_ATTR_SPORT, /* be16 */
MPTCP_ATTR_DPORT, /* be16 */
MPTCP_ATTR_BACKUP, /* u8 */
MPTCP_ATTR_ERROR, /* u8 */
MPTCP_ATTR_FLAGS, /* u16 */
MPTCP_ATTR_TIMEOUT, /* u32 */
MPTCP_ATTR_IF_IDX, /* s32 */
MPTCP_ATTR_RESET_REASON,/* u32 */
MPTCP_ATTR_RESET_FLAGS, /* u32 */
MPTCP_ATTR_SERVER_SIDE, /* u8 */
__MPTCP_ATTR_AFTER_LAST
};
#define MPTCP_ATTR_MAX (__MPTCP_ATTR_AFTER_LAST - 1)
/* MPTCP Reset reason codes, rfc8684 */
#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; /* size of this structure in userspace */
__u32 num_subflows; /* must be 0, set by kernel */
__u32 size_kernel; /* must be 0, set by kernel */
__u32 size_user; /* size of one element in data[] */
} __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;
};
};
/* MPTCP socket options */
#define MPTCP_INFO 1
#define MPTCP_TCPINFO 2
#define MPTCP_SUBFLOW_ADDRS 3
#endif /* _MPTCP_H */
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