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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2#ifndef _UAPI_MPTCP_H3#define _UAPI_MPTCP_H4 5#ifndef __KERNEL__6#include <netinet/in.h> /* for sockaddr_in and sockaddr_in6 */7#include <sys/socket.h> /* for struct sockaddr */8#endif9 10#include <linux/const.h>11#include <linux/types.h>12#include <linux/in.h> /* for sockaddr_in */13#include <linux/in6.h> /* for sockaddr_in6 */14#include <linux/socket.h> /* for sockaddr_storage and sa_family */15 16#define MPTCP_SUBFLOW_FLAG_MCAP_REM _BITUL(0)17#define MPTCP_SUBFLOW_FLAG_MCAP_LOC _BITUL(1)18#define MPTCP_SUBFLOW_FLAG_JOIN_REM _BITUL(2)19#define MPTCP_SUBFLOW_FLAG_JOIN_LOC _BITUL(3)20#define MPTCP_SUBFLOW_FLAG_BKUP_REM _BITUL(4)21#define MPTCP_SUBFLOW_FLAG_BKUP_LOC _BITUL(5)22#define MPTCP_SUBFLOW_FLAG_FULLY_ESTABLISHED _BITUL(6)23#define MPTCP_SUBFLOW_FLAG_CONNECTED _BITUL(7)24#define MPTCP_SUBFLOW_FLAG_MAPVALID _BITUL(8)25 26#define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds"27#define MPTCP_PM_EV_GRP_NAME "mptcp_pm_events"28 29#include <linux/mptcp_pm.h>30 31#define MPTCP_INFO_FLAG_FALLBACK _BITUL(0)32#define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED _BITUL(1)33 34#define MPTCP_PM_ADDR_FLAG_SIGNAL (1 << 0)35#define MPTCP_PM_ADDR_FLAG_SUBFLOW (1 << 1)36#define MPTCP_PM_ADDR_FLAG_BACKUP (1 << 2)37#define MPTCP_PM_ADDR_FLAG_FULLMESH (1 << 3)38#define MPTCP_PM_ADDR_FLAG_IMPLICIT (1 << 4)39 40struct mptcp_info {41 __u8 mptcpi_subflows;42 __u8 mptcpi_add_addr_signal;43 __u8 mptcpi_add_addr_accepted;44 __u8 mptcpi_subflows_max;45 __u8 mptcpi_add_addr_signal_max;46 __u8 mptcpi_add_addr_accepted_max;47 __u32 mptcpi_flags;48 __u32 mptcpi_token;49 __u64 mptcpi_write_seq;50 __u64 mptcpi_snd_una;51 __u64 mptcpi_rcv_nxt;52 __u8 mptcpi_local_addr_used;53 __u8 mptcpi_local_addr_max;54 __u8 mptcpi_csum_enabled;55 __u32 mptcpi_retransmits;56 __u64 mptcpi_bytes_retrans;57 __u64 mptcpi_bytes_sent;58 __u64 mptcpi_bytes_received;59 __u64 mptcpi_bytes_acked;60 __u8 mptcpi_subflows_total;61 __u8 reserved[3];62 __u32 mptcpi_last_data_sent;63 __u32 mptcpi_last_data_recv;64 __u32 mptcpi_last_ack_recv;65};66 67/* MPTCP Reset reason codes, rfc8684 */68#define MPTCP_RST_EUNSPEC 069#define MPTCP_RST_EMPTCP 170#define MPTCP_RST_ERESOURCE 271#define MPTCP_RST_EPROHIBIT 372#define MPTCP_RST_EWQ2BIG 473#define MPTCP_RST_EBADPERF 574#define MPTCP_RST_EMIDDLEBOX 675 76struct mptcp_subflow_data {77 __u32 size_subflow_data; /* size of this structure in userspace */78 __u32 num_subflows; /* must be 0, set by kernel */79 __u32 size_kernel; /* must be 0, set by kernel */80 __u32 size_user; /* size of one element in data[] */81} __attribute__((aligned(8)));82 83struct mptcp_subflow_addrs {84 union {85 __kernel_sa_family_t sa_family;86 struct sockaddr sa_local;87 struct sockaddr_in sin_local;88 struct sockaddr_in6 sin6_local;89 struct __kernel_sockaddr_storage ss_local;90 };91 union {92 struct sockaddr sa_remote;93 struct sockaddr_in sin_remote;94 struct sockaddr_in6 sin6_remote;95 struct __kernel_sockaddr_storage ss_remote;96 };97};98 99struct mptcp_subflow_info {100 __u32 id;101 struct mptcp_subflow_addrs addrs;102};103 104struct mptcp_full_info {105 __u32 size_tcpinfo_kernel; /* must be 0, set by kernel */106 __u32 size_tcpinfo_user;107 __u32 size_sfinfo_kernel; /* must be 0, set by kernel */108 __u32 size_sfinfo_user;109 __u32 num_subflows; /* must be 0, set by kernel (real subflow count) */110 __u32 size_arrays_user; /* max subflows that userspace is interested in;111 * the buffers at subflow_info/tcp_info112 * are respectively at least:113 * size_arrays * size_sfinfo_user114 * size_arrays * size_tcpinfo_user115 * bytes wide116 */117 __aligned_u64 subflow_info;118 __aligned_u64 tcp_info;119 struct mptcp_info mptcp_info;120};121 122/* MPTCP socket options */123#define MPTCP_INFO 1124#define MPTCP_TCPINFO 2125#define MPTCP_SUBFLOW_ADDRS 3126#define MPTCP_FULL_INFO 4127 128#endif /* _UAPI_MPTCP_H */129