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Linux kernel mirror (for testing)
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linux
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
44struct 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
89struct 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
96struct 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
112struct mptcp_subflow_info {
113 __u32 id;
114 struct mptcp_subflow_addrs addrs;
115};
116
117struct 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 */