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

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#ifndef _MPTCP_H

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#define _MPTCP_H

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#include <linux/const.h>

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#include <linux/types.h>

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#define MPTCP_SUBFLOW_FLAG_MCAP_REM _BITUL(0)

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#define MPTCP_SUBFLOW_FLAG_MCAP_LOC _BITUL(1)

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#define MPTCP_SUBFLOW_FLAG_JOIN_REM _BITUL(2)

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#define MPTCP_SUBFLOW_FLAG_JOIN_LOC _BITUL(3)

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#define MPTCP_SUBFLOW_FLAG_BKUP_REM _BITUL(4)

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#define MPTCP_SUBFLOW_FLAG_BKUP_LOC _BITUL(5)

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#define MPTCP_SUBFLOW_FLAG_FULLY_ESTABLISHED _BITUL(6)

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#define MPTCP_SUBFLOW_FLAG_CONNECTED _BITUL(7)

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#define MPTCP_SUBFLOW_FLAG_MAPVALID _BITUL(8)

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enum {

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MPTCP_SUBFLOW_ATTR_UNSPEC,

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MPTCP_SUBFLOW_ATTR_TOKEN_REM,

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MPTCP_SUBFLOW_ATTR_TOKEN_LOC,

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MPTCP_SUBFLOW_ATTR_RELWRITE_SEQ,

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MPTCP_SUBFLOW_ATTR_MAP_SEQ,

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MPTCP_SUBFLOW_ATTR_MAP_SFSEQ,

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MPTCP_SUBFLOW_ATTR_SSN_OFFSET,

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MPTCP_SUBFLOW_ATTR_MAP_DATALEN,

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MPTCP_SUBFLOW_ATTR_FLAGS,

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MPTCP_SUBFLOW_ATTR_ID_REM,

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MPTCP_SUBFLOW_ATTR_ID_LOC,

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MPTCP_SUBFLOW_ATTR_PAD,

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__MPTCP_SUBFLOW_ATTR_MAX

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};

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#define MPTCP_SUBFLOW_ATTR_MAX (__MPTCP_SUBFLOW_ATTR_MAX - 1)

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/* netlink interface */

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#define MPTCP_PM_NAME "mptcp_pm"

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#define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds"

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#define MPTCP_PM_EV_GRP_NAME "mptcp_pm_events"

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#define MPTCP_PM_VER 0x1

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/*

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* ATTR types defined for MPTCP

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*/

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enum {

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MPTCP_PM_ATTR_UNSPEC,

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MPTCP_PM_ATTR_ADDR, /* nested address */

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MPTCP_PM_ATTR_RCV_ADD_ADDRS, /* u32 */

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MPTCP_PM_ATTR_SUBFLOWS, /* u32 */

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__MPTCP_PM_ATTR_MAX

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};

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#define MPTCP_PM_ATTR_MAX (__MPTCP_PM_ATTR_MAX - 1)

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enum {

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MPTCP_PM_ADDR_ATTR_UNSPEC,

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MPTCP_PM_ADDR_ATTR_FAMILY, /* u16 */

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MPTCP_PM_ADDR_ATTR_ID, /* u8 */

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MPTCP_PM_ADDR_ATTR_ADDR4, /* struct in_addr */

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MPTCP_PM_ADDR_ATTR_ADDR6, /* struct in6_addr */

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MPTCP_PM_ADDR_ATTR_PORT, /* u16 */

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MPTCP_PM_ADDR_ATTR_FLAGS, /* u32 */

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MPTCP_PM_ADDR_ATTR_IF_IDX, /* s32 */

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__MPTCP_PM_ADDR_ATTR_MAX

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};

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#define MPTCP_PM_ADDR_ATTR_MAX (__MPTCP_PM_ADDR_ATTR_MAX - 1)

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#define MPTCP_PM_ADDR_FLAG_SIGNAL (1 << 0)

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#define MPTCP_PM_ADDR_FLAG_SUBFLOW (1 << 1)

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#define MPTCP_PM_ADDR_FLAG_BACKUP (1 << 2)

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#define MPTCP_PM_ADDR_FLAG_FULLMESH (1 << 3)

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#define MPTCP_PM_ADDR_FLAG_IMPLICIT (1 << 4)

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enum {

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MPTCP_PM_CMD_UNSPEC,

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MPTCP_PM_CMD_ADD_ADDR,

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MPTCP_PM_CMD_DEL_ADDR,

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MPTCP_PM_CMD_GET_ADDR,

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MPTCP_PM_CMD_FLUSH_ADDRS,

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MPTCP_PM_CMD_SET_LIMITS,

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MPTCP_PM_CMD_GET_LIMITS,

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MPTCP_PM_CMD_SET_FLAGS,

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__MPTCP_PM_CMD_AFTER_LAST

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};

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#define MPTCP_INFO_FLAG_FALLBACK _BITUL(0)

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#define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED _BITUL(1)

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struct mptcp_info {

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__u8 mptcpi_subflows;

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__u8 mptcpi_add_addr_signal;

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__u8 mptcpi_add_addr_accepted;

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__u8 mptcpi_subflows_max;

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__u8 mptcpi_add_addr_signal_max;

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__u8 mptcpi_add_addr_accepted_max;

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__u32 mptcpi_flags;

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__u32 mptcpi_token;

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__u64 mptcpi_write_seq;

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__u64 mptcpi_snd_una;

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__u64 mptcpi_rcv_nxt;

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__u8 mptcpi_local_addr_used;

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__u8 mptcpi_local_addr_max;

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};

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/*

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* MPTCP_EVENT_CREATED: token, family, saddr4 | saddr6, daddr4 | daddr6,

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* sport, dport

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* A new MPTCP connection has been created. It is the good time to allocate

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* memory and send ADD_ADDR if needed. Depending on the traffic-patterns

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* it can take a long time until the MPTCP_EVENT_ESTABLISHED is sent.

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*

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* MPTCP_EVENT_ESTABLISHED: token, family, saddr4 | saddr6, daddr4 | daddr6,

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* sport, dport

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* A MPTCP connection is established (can start new subflows).

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*

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* MPTCP_EVENT_CLOSED: token

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* A MPTCP connection has stopped.

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*

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* MPTCP_EVENT_ANNOUNCED: token, rem_id, family, daddr4 | daddr6 [, dport]

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* A new address has been announced by the peer.

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*

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* MPTCP_EVENT_REMOVED: token, rem_id

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* An address has been lost by the peer.

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*

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* MPTCP_EVENT_SUB_ESTABLISHED: token, family, saddr4 | saddr6,

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* daddr4 | daddr6, sport, dport, backup,

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* if_idx [, error]

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* A new subflow has been established. 'error' should not be set.

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*

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* MPTCP_EVENT_SUB_CLOSED: token, family, saddr4 | saddr6, daddr4 | daddr6,

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* sport, dport, backup, if_idx [, error]

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* A subflow has been closed. An error (copy of sk_err) could be set if an

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* error has been detected for this subflow.

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*

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* MPTCP_EVENT_SUB_PRIORITY: token, family, saddr4 | saddr6, daddr4 | daddr6,

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* sport, dport, backup, if_idx [, error]

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* The priority of a subflow has changed. 'error' should not be set.

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*/

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enum mptcp_event_type {

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MPTCP_EVENT_UNSPEC = 0,

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MPTCP_EVENT_CREATED = 1,

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MPTCP_EVENT_ESTABLISHED = 2,

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MPTCP_EVENT_CLOSED = 3,

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MPTCP_EVENT_ANNOUNCED = 6,

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MPTCP_EVENT_REMOVED = 7,

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MPTCP_EVENT_SUB_ESTABLISHED = 10,

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MPTCP_EVENT_SUB_CLOSED = 11,

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MPTCP_EVENT_SUB_PRIORITY = 13,

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};

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enum mptcp_event_attr {

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MPTCP_ATTR_UNSPEC = 0,

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MPTCP_ATTR_TOKEN, /* u32 */

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MPTCP_ATTR_FAMILY, /* u16 */

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MPTCP_ATTR_LOC_ID, /* u8 */

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MPTCP_ATTR_REM_ID, /* u8 */

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MPTCP_ATTR_SADDR4, /* be32 */

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MPTCP_ATTR_SADDR6, /* struct in6_addr */

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MPTCP_ATTR_DADDR4, /* be32 */

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MPTCP_ATTR_DADDR6, /* struct in6_addr */

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MPTCP_ATTR_SPORT, /* be16 */

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MPTCP_ATTR_DPORT, /* be16 */

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MPTCP_ATTR_BACKUP, /* u8 */

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MPTCP_ATTR_ERROR, /* u8 */

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MPTCP_ATTR_FLAGS, /* u16 */

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MPTCP_ATTR_TIMEOUT, /* u32 */

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MPTCP_ATTR_IF_IDX, /* s32 */

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MPTCP_ATTR_RESET_REASON,/* u32 */

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MPTCP_ATTR_RESET_FLAGS, /* u32 */

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__MPTCP_ATTR_AFTER_LAST

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};

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#define MPTCP_ATTR_MAX (__MPTCP_ATTR_AFTER_LAST - 1)

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/* MPTCP Reset reason codes, rfc8684 */

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#define MPTCP_RST_EUNSPEC 0

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#define MPTCP_RST_EMPTCP 1

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#define MPTCP_RST_ERESOURCE 2

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#define MPTCP_RST_EPROHIBIT 3

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#define MPTCP_RST_EWQ2BIG 4

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#define MPTCP_RST_EBADPERF 5

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#define MPTCP_RST_EMIDDLEBOX 6

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#endif /* _MPTCP_H */

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