242 lines
6.9 KiB
C
242 lines
6.9 KiB
C
/* 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 <netinet/in.h> /* for sockaddr_in and sockaddr_in6 */
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#include <sys/socket.h> /* for struct sockaddr */
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#include <linux/const.h>
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#include <linux/types.h>
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#include <linux/in.h> /* for sockaddr_in */
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#include <linux/in6.h> /* for sockaddr_in6 */
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#include <linux/socket.h> /* for sockaddr_storage and sa_family */
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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_TOKEN, /* u32 */
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MPTCP_PM_ATTR_LOC_ID, /* u8 */
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MPTCP_PM_ATTR_ADDR_REMOTE, /* nested address */
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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_ANNOUNCE,
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MPTCP_PM_CMD_REMOVE,
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MPTCP_PM_CMD_SUBFLOW_CREATE,
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MPTCP_PM_CMD_SUBFLOW_DESTROY,
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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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__u8 mptcpi_csum_enabled;
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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, loc_id, rem_id,
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* saddr4 | saddr6, daddr4 | daddr6, sport,
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* dport, backup, 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, loc_id, rem_id, saddr4 | saddr6,
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* daddr4 | daddr6, sport, dport, backup, if_idx
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* [, 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, loc_id, rem_id, saddr4 | saddr6,
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* daddr4 | daddr6, sport, dport, backup, if_idx
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* [, 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_SERVER_SIDE, /* u8 */
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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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struct mptcp_subflow_data {
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__u32 size_subflow_data; /* size of this structure in userspace */
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__u32 num_subflows; /* must be 0, set by kernel */
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__u32 size_kernel; /* must be 0, set by kernel */
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__u32 size_user; /* size of one element in data[] */
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} __attribute__((aligned(8)));
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struct mptcp_subflow_addrs {
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union {
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__kernel_sa_family_t sa_family;
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struct sockaddr sa_local;
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struct sockaddr_in sin_local;
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struct sockaddr_in6 sin6_local;
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struct __kernel_sockaddr_storage ss_local;
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};
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union {
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struct sockaddr sa_remote;
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struct sockaddr_in sin_remote;
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struct sockaddr_in6 sin6_remote;
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struct __kernel_sockaddr_storage ss_remote;
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};
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};
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/* MPTCP socket options */
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#define MPTCP_INFO 1
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#define MPTCP_TCPINFO 2
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#define MPTCP_SUBFLOW_ADDRS 3
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#endif /* _MPTCP_H */
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