1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 #ifndef _UAPI_MPTCP_H 3 #define _UAPI_MPTCP_H 4 5 #ifndef __KERNEL__ 6 #include <netinet/in.h> /* for sockaddr_in and sockaddr_in6 */ 7 #include <sys/socket.h> /* for struct sockaddr */ 8 #endif 9 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_EV_FLAG_DENY_JOIN_ID0 _BITUL(0) 35 36 #define MPTCP_PM_ADDR_FLAG_SIGNAL (1 << 0) 37 #define MPTCP_PM_ADDR_FLAG_SUBFLOW (1 << 1) 38 #define MPTCP_PM_ADDR_FLAG_BACKUP (1 << 2) 39 #define MPTCP_PM_ADDR_FLAG_FULLMESH (1 << 3) 40 #define MPTCP_PM_ADDR_FLAG_IMPLICIT (1 << 4) 41 42 struct mptcp_info { 43 __u8 mptcpi_subflows; 44 __u8 mptcpi_add_addr_signal; 45 __u8 mptcpi_add_addr_accepted; 46 __u8 mptcpi_subflows_max; 47 __u8 mptcpi_add_addr_signal_max; 48 __u8 mptcpi_add_addr_accepted_max; 49 __u32 mptcpi_flags; 50 __u32 mptcpi_token; 51 __u64 mptcpi_write_seq; 52 __u64 mptcpi_snd_una; 53 __u64 mptcpi_rcv_nxt; 54 __u8 mptcpi_local_addr_used; 55 __u8 mptcpi_local_addr_max; 56 __u8 mptcpi_csum_enabled; 57 __u32 mptcpi_retransmits; 58 __u64 mptcpi_bytes_retrans; 59 __u64 mptcpi_bytes_sent; 60 __u64 mptcpi_bytes_received; 61 __u64 mptcpi_bytes_acked; 62 __u8 mptcpi_subflows_total; 63 __u8 reserved[3]; 64 __u32 mptcpi_last_data_sent; 65 __u32 mptcpi_last_data_recv; 66 __u32 mptcpi_last_ack_recv; 67 }; 68 69 /* MPTCP Reset reason codes, rfc8684 */ 70 #define MPTCP_RST_EUNSPEC 0 71 #define MPTCP_RST_EMPTCP 1 72 #define MPTCP_RST_ERESOURCE 2 73 #define MPTCP_RST_EPROHIBIT 3 74 #define MPTCP_RST_EWQ2BIG 4 75 #define MPTCP_RST_EBADPERF 5 76 #define MPTCP_RST_EMIDDLEBOX 6 77 78 struct mptcp_subflow_data { 79 __u32 size_subflow_data; /* size of this structure in userspace */ 80 __u32 num_subflows; /* must be 0, set by kernel */ 81 __u32 size_kernel; /* must be 0, set by kernel */ 82 __u32 size_user; /* size of one element in data[] */ 83 } __attribute__((aligned(8))); 84 85 struct mptcp_subflow_addrs { 86 union { 87 __kernel_sa_family_t sa_family; 88 struct sockaddr sa_local; 89 struct sockaddr_in sin_local; 90 struct sockaddr_in6 sin6_local; 91 struct __kernel_sockaddr_storage ss_local; 92 }; 93 union { 94 struct sockaddr sa_remote; 95 struct sockaddr_in sin_remote; 96 struct sockaddr_in6 sin6_remote; 97 struct __kernel_sockaddr_storage ss_remote; 98 }; 99 }; 100 101 struct mptcp_subflow_info { 102 __u32 id; 103 struct mptcp_subflow_addrs addrs; 104 }; 105 106 struct mptcp_full_info { 107 __u32 size_tcpinfo_kernel; /* must be 0, set by kernel */ 108 __u32 size_tcpinfo_user; 109 __u32 size_sfinfo_kernel; /* must be 0, set by kernel */ 110 __u32 size_sfinfo_user; 111 __u32 num_subflows; /* must be 0, set by kernel (real subflow count) */ 112 __u32 size_arrays_user; /* max subflows that userspace is interested in; 113 * the buffers at subflow_info/tcp_info 114 * are respectively at least: 115 * size_arrays * size_sfinfo_user 116 * size_arrays * size_tcpinfo_user 117 * bytes wide 118 */ 119 __aligned_u64 subflow_info; 120 __aligned_u64 tcp_info; 121 struct mptcp_info mptcp_info; 122 }; 123 124 /* MPTCP socket options */ 125 #define MPTCP_INFO 1 126 #define MPTCP_TCPINFO 2 127 #define MPTCP_SUBFLOW_ADDRS 3 128 #define MPTCP_FULL_INFO 4 129 130 #endif /* _UAPI_MPTCP_H */ 131