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 #define MPTCP_PM_EV_FLAG_SERVER_SIDE _BITUL(1) 36 37 #define MPTCP_PM_ADDR_FLAG_SIGNAL _BITUL(0) 38 #define MPTCP_PM_ADDR_FLAG_SUBFLOW _BITUL(1) 39 #define MPTCP_PM_ADDR_FLAG_BACKUP _BITUL(2) 40 #define MPTCP_PM_ADDR_FLAG_FULLMESH _BITUL(3) 41 #define MPTCP_PM_ADDR_FLAG_IMPLICIT _BITUL(4) 42 #define MPTCP_PM_ADDR_FLAG_LAMINAR _BITUL(5) 43 44 struct mptcp_info { 45 __u8 mptcpi_subflows; 46 #define mptcpi_extra_subflows mptcpi_subflows 47 __u8 mptcpi_add_addr_signal; 48 __u8 mptcpi_add_addr_accepted; 49 __u8 mptcpi_subflows_max; 50 #define mptcpi_limit_extra_subflows mptcpi_subflows_max 51 __u8 mptcpi_add_addr_signal_max; 52 #define mptcpi_endp_signal_max mptcpi_add_addr_signal_max 53 __u8 mptcpi_add_addr_accepted_max; 54 #define mptcpi_limit_add_addr_accepted mptcpi_add_addr_accepted_max 55 /* 16-bit hole that can no longer be filled */ 56 __u32 mptcpi_flags; 57 __u32 mptcpi_token; 58 __u64 mptcpi_write_seq; 59 __u64 mptcpi_snd_una; 60 __u64 mptcpi_rcv_nxt; 61 __u8 mptcpi_local_addr_used; 62 __u8 mptcpi_local_addr_max; 63 #define mptcpi_endp_subflow_max mptcpi_local_addr_max 64 __u8 mptcpi_csum_enabled; 65 /* 8-bit hole that can no longer be filled */ 66 __u32 mptcpi_retransmits; 67 __u64 mptcpi_bytes_retrans; 68 __u64 mptcpi_bytes_sent; 69 __u64 mptcpi_bytes_received; 70 __u64 mptcpi_bytes_acked; 71 __u8 mptcpi_subflows_total; 72 __u8 mptcpi_endp_laminar_max; 73 __u8 mptcpi_endp_fullmesh_max; 74 __u8 reserved; 75 __u32 mptcpi_last_data_sent; 76 __u32 mptcpi_last_data_recv; 77 __u32 mptcpi_last_ack_recv; 78 }; 79 80 /* MPTCP Reset reason codes, rfc8684 */ 81 #define MPTCP_RST_EUNSPEC 0 82 #define MPTCP_RST_EMPTCP 1 83 #define MPTCP_RST_ERESOURCE 2 84 #define MPTCP_RST_EPROHIBIT 3 85 #define MPTCP_RST_EWQ2BIG 4 86 #define MPTCP_RST_EBADPERF 5 87 #define MPTCP_RST_EMIDDLEBOX 6 88 89 struct mptcp_subflow_data { 90 __u32 size_subflow_data; /* size of this structure in userspace */ 91 __u32 num_subflows; /* must be 0, set by kernel */ 92 __u32 size_kernel; /* must be 0, set by kernel */ 93 __u32 size_user; /* size of one element in data[] */ 94 } __attribute__((aligned(8))); 95 96 struct mptcp_subflow_addrs { 97 union { 98 __kernel_sa_family_t sa_family; 99 struct sockaddr sa_local; 100 struct sockaddr_in sin_local; 101 struct sockaddr_in6 sin6_local; 102 struct __kernel_sockaddr_storage ss_local; 103 }; 104 union { 105 struct sockaddr sa_remote; 106 struct sockaddr_in sin_remote; 107 struct sockaddr_in6 sin6_remote; 108 struct __kernel_sockaddr_storage ss_remote; 109 }; 110 }; 111 112 struct mptcp_subflow_info { 113 __u32 id; 114 struct mptcp_subflow_addrs addrs; 115 }; 116 117 struct mptcp_full_info { 118 __u32 size_tcpinfo_kernel; /* must be 0, set by kernel */ 119 __u32 size_tcpinfo_user; 120 __u32 size_sfinfo_kernel; /* must be 0, set by kernel */ 121 __u32 size_sfinfo_user; 122 __u32 num_subflows; /* must be 0, set by kernel (real subflow count) */ 123 __u32 size_arrays_user; /* max subflows that userspace is interested in; 124 * the buffers at subflow_info/tcp_info 125 * are respectively at least: 126 * size_arrays * size_sfinfo_user 127 * size_arrays * size_tcpinfo_user 128 * bytes wide 129 */ 130 __aligned_u64 subflow_info; 131 __aligned_u64 tcp_info; 132 struct mptcp_info mptcp_info; 133 }; 134 135 /* MPTCP socket options */ 136 #define MPTCP_INFO 1 137 #define MPTCP_TCPINFO 2 138 #define MPTCP_SUBFLOW_ADDRS 3 139 #define MPTCP_FULL_INFO 4 140 141 #endif /* _UAPI_MPTCP_H */ 142