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mptcp.h
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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) #define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds" #define MPTCP_PM_EV_GRP_NAME "mptcp_pm_events" #include <linux/mptcp_pm.h> #define MPTCP_INFO_FLAG_FALLBACK _BITUL(0) #define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED _BITUL(1) #define MPTCP_PM_EV_FLAG_DENY_JOIN_ID0 _BITUL(0) #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) #define MPTCP_PM_ADDR_FLAGS_MASK GENMASK(4, 0) 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; __u32 mptcpi_retransmits; __u64 mptcpi_bytes_retrans; __u64 mptcpi_bytes_sent; __u64 mptcpi_bytes_received; __u64 mptcpi_bytes_acked; __u8 mptcpi_subflows_total; __u8 reserved[3]; __u32 mptcpi_last_data_sent; __u32 mptcpi_last_data_recv; __u32 mptcpi_last_ack_recv; }; /* 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; }; }; struct mptcp_subflow_info { __u32 id; struct mptcp_subflow_addrs addrs; }; struct mptcp_full_info { __u32 size_tcpinfo_kernel; /* must be 0, set by kernel */ __u32 size_tcpinfo_user; __u32 size_sfinfo_kernel; /* must be 0, set by kernel */ __u32 size_sfinfo_user; __u32 num_subflows; /* must be 0, set by kernel (real subflow count) */ __u32 size_arrays_user; /* max subflows that userspace is interested in; * the buffers at subflow_info/tcp_info * are respectively at least: * size_arrays * size_sfinfo_user * size_arrays * size_tcpinfo_user * bytes wide */ __aligned_u64 subflow_info; __aligned_u64 tcp_info; struct mptcp_info mptcp_info; }; /* MPTCP socket options */ #define MPTCP_INFO 1 #define MPTCP_TCPINFO 2 #define MPTCP_SUBFLOW_ADDRS 3 #define MPTCP_FULL_INFO 4 #endif /* _MPTCP_H */