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- /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
- #ifndef _UAPI_MPTCP_H
- #define _UAPI_MPTCP_H
- #ifndef __KERNEL__
- #include <netinet/in.h> /* for sockaddr_in and sockaddr_in6 */
- #include <sys/socket.h> /* for struct sockaddr */
- #endif
- #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.
- */
- 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, /* 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 /* _UAPI_MPTCP_H */
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