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_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 40 struct 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 }; 62 63 /* MPTCP Reset reason codes, rfc8684 */ 64 #define MPTCP_RST_EUNSPEC 0 65 #define MPTCP_RST_EMPTCP 1 66 #define MPTCP_RST_ERESOURCE 2 67 #define MPTCP_RST_EPROHIBIT 3 68 #define MPTCP_RST_EWQ2BIG 4 69 #define MPTCP_RST_EBADPERF 5 70 #define MPTCP_RST_EMIDDLEBOX 6 71 72 struct mptcp_subflow_data { 73 __u32 size_subflow_data; /* size of this structure in userspace */ 74 __u32 num_subflows; /* must be 0, set by kernel */ 75 __u32 size_kernel; /* must be 0, set by kernel */ 76 __u32 size_user; /* size of one element in data[] */ 77 } __attribute__((aligned(8))); 78 79 struct mptcp_subflow_addrs { 80 union { 81 __kernel_sa_family_t sa_family; 82 struct sockaddr sa_local; 83 struct sockaddr_in sin_local; 84 struct sockaddr_in6 sin6_local; 85 struct __kernel_sockaddr_storage ss_local; 86 }; 87 union { 88 struct sockaddr sa_remote; 89 struct sockaddr_in sin_remote; 90 struct sockaddr_in6 sin6_remote; 91 struct __kernel_sockaddr_storage ss_remote; 92 }; 93 }; 94 95 struct mptcp_subflow_info { 96 __u32 id; 97 struct mptcp_subflow_addrs addrs; 98 }; 99 100 struct mptcp_full_info { 101 __u32 size_tcpinfo_kernel; /* must be 0, set by kernel */ 102 __u32 size_tcpinfo_user; 103 __u32 size_sfinfo_kernel; /* must be 0, set by kernel */ 104 __u32 size_sfinfo_user; 105 __u32 num_subflows; /* must be 0, set by kernel (real subflow count) */ 106 __u32 size_arrays_user; /* max subflows that userspace is interested in; 107 * the buffers at subflow_info/tcp_info 108 * are respectively at least: 109 * size_arrays * size_sfinfo_user 110 * size_arrays * size_tcpinfo_user 111 * bytes wide 112 */ 113 __aligned_u64 subflow_info; 114 __aligned_u64 tcp_info; 115 struct mptcp_info mptcp_info; 116 }; 117 118 /* MPTCP socket options */ 119 #define MPTCP_INFO 1 120 #define MPTCP_TCPINFO 2 121 #define MPTCP_SUBFLOW_ADDRS 3 122 #define MPTCP_FULL_INFO 4 123 124 #endif /* _UAPI_MPTCP_H */ 125