/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ #ifndef _MPTCP_H #define _MPTCP_H #include /* for sockaddr_in and sockaddr_in6 */ #include /* for struct sockaddr */ #include #include #include /* for sockaddr_in */ #include /* for sockaddr_in6 */ #include /* 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) enum { MPTCP_SUBFLOW_ATTR_UNSPEC, MPTCP_SUBFLOW_ATTR_TOKEN_REM, MPTCP_SUBFLOW_ATTR_TOKEN_LOC, MPTCP_SUBFLOW_ATTR_RELWRITE_SEQ, MPTCP_SUBFLOW_ATTR_MAP_SEQ, MPTCP_SUBFLOW_ATTR_MAP_SFSEQ, MPTCP_SUBFLOW_ATTR_SSN_OFFSET, MPTCP_SUBFLOW_ATTR_MAP_DATALEN, MPTCP_SUBFLOW_ATTR_FLAGS, MPTCP_SUBFLOW_ATTR_ID_REM, MPTCP_SUBFLOW_ATTR_ID_LOC, MPTCP_SUBFLOW_ATTR_PAD, __MPTCP_SUBFLOW_ATTR_MAX }; #define MPTCP_SUBFLOW_ATTR_MAX (__MPTCP_SUBFLOW_ATTR_MAX - 1) /* netlink interface */ #define MPTCP_PM_NAME "mptcp_pm" #define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds" #define MPTCP_PM_EV_GRP_NAME "mptcp_pm_events" #define MPTCP_PM_VER 0x1 /* * ATTR types defined for MPTCP */ enum { MPTCP_PM_ATTR_UNSPEC, MPTCP_PM_ATTR_ADDR, /* nested address */ MPTCP_PM_ATTR_RCV_ADD_ADDRS, /* u32 */ MPTCP_PM_ATTR_SUBFLOWS, /* u32 */ __MPTCP_PM_ATTR_MAX }; #define MPTCP_PM_ATTR_MAX (__MPTCP_PM_ATTR_MAX - 1) enum { MPTCP_PM_ADDR_ATTR_UNSPEC, MPTCP_PM_ADDR_ATTR_FAMILY, /* u16 */ MPTCP_PM_ADDR_ATTR_ID, /* u8 */ MPTCP_PM_ADDR_ATTR_ADDR4, /* struct in_addr */ MPTCP_PM_ADDR_ATTR_ADDR6, /* struct in6_addr */ MPTCP_PM_ADDR_ATTR_PORT, /* u16 */ MPTCP_PM_ADDR_ATTR_FLAGS, /* u32 */ MPTCP_PM_ADDR_ATTR_IF_IDX, /* s32 */ __MPTCP_PM_ADDR_ATTR_MAX }; #define MPTCP_PM_ADDR_ATTR_MAX (__MPTCP_PM_ADDR_ATTR_MAX - 1) #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) enum { MPTCP_PM_CMD_UNSPEC, MPTCP_PM_CMD_ADD_ADDR, MPTCP_PM_CMD_DEL_ADDR, MPTCP_PM_CMD_GET_ADDR, MPTCP_PM_CMD_FLUSH_ADDRS, MPTCP_PM_CMD_SET_LIMITS, MPTCP_PM_CMD_GET_LIMITS, MPTCP_PM_CMD_SET_FLAGS, __MPTCP_PM_CMD_AFTER_LAST }; #define MPTCP_INFO_FLAG_FALLBACK _BITUL(0) #define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED _BITUL(1) 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; }; /* * MPTCP_EVENT_CREATED: token, family, saddr4 | saddr6, daddr4 | daddr6, * sport, dport * A new MPTCP connection has been created. It is the good time to allocate * memory and send ADD_ADDR if needed. Depending on the traffic-patterns * it can take a long time until the MPTCP_EVENT_ESTABLISHED is sent. * * MPTCP_EVENT_ESTABLISHED: token, family, saddr4 | saddr6, daddr4 | daddr6, * sport, dport * A MPTCP connection is established (can start new subflows). * * MPTCP_EVENT_CLOSED: token * A MPTCP connection has stopped. * * MPTCP_EVENT_ANNOUNCED: token, rem_id, family, daddr4 | daddr6 [, dport] * A new address has been announced by the peer. * * MPTCP_EVENT_REMOVED: token, rem_id * An address has been lost by the peer. * * MPTCP_EVENT_SUB_ESTABLISHED: token, family, loc_id, rem_id, * saddr4 | saddr6, daddr4 | daddr6, sport, * dport, backup, if_idx [, error] * A new subflow has been established. 'error' should not be set. * * MPTCP_EVENT_SUB_CLOSED: token, family, loc_id, rem_id, saddr4 | saddr6, * daddr4 | daddr6, sport, dport, backup, if_idx * [, error] * A subflow has been closed. An error (copy of sk_err) could be set if an * error has been detected for this subflow. * * MPTCP_EVENT_SUB_PRIORITY: token, family, loc_id, rem_id, saddr4 | saddr6, * daddr4 | daddr6, sport, dport, backup, if_idx * [, error] * The priority of a subflow has changed. 'error' should not be set. */ enum mptcp_event_type { MPTCP_EVENT_UNSPEC = 0, MPTCP_EVENT_CREATED = 1, MPTCP_EVENT_ESTABLISHED = 2, MPTCP_EVENT_CLOSED = 3, MPTCP_EVENT_ANNOUNCED = 6, MPTCP_EVENT_REMOVED = 7, MPTCP_EVENT_SUB_ESTABLISHED = 10, MPTCP_EVENT_SUB_CLOSED = 11, MPTCP_EVENT_SUB_PRIORITY = 13, }; enum mptcp_event_attr { MPTCP_ATTR_UNSPEC = 0, MPTCP_ATTR_TOKEN, /* u32 */ MPTCP_ATTR_FAMILY, /* u16 */ MPTCP_ATTR_LOC_ID, /* u8 */ MPTCP_ATTR_REM_ID, /* u8 */ MPTCP_ATTR_SADDR4, /* be32 */ MPTCP_ATTR_SADDR6, /* struct in6_addr */ MPTCP_ATTR_DADDR4, /* be32 */ MPTCP_ATTR_DADDR6, /* struct in6_addr */ MPTCP_ATTR_SPORT, /* be16 */ MPTCP_ATTR_DPORT, /* be16 */ MPTCP_ATTR_BACKUP, /* u8 */ MPTCP_ATTR_ERROR, /* u8 */ MPTCP_ATTR_FLAGS, /* u16 */ MPTCP_ATTR_TIMEOUT, /* u32 */ MPTCP_ATTR_IF_IDX, /* s32 */ MPTCP_ATTR_RESET_REASON,/* u32 */ MPTCP_ATTR_RESET_FLAGS, /* u32 */ __MPTCP_ATTR_AFTER_LAST }; #define MPTCP_ATTR_MAX (__MPTCP_ATTR_AFTER_LAST - 1) /* 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; }; }; /* MPTCP socket options */ #define MPTCP_INFO 1 #define MPTCP_TCPINFO 2 #define MPTCP_SUBFLOW_ADDRS 3 #endif /* _MPTCP_H */