1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef _MPTCP_H
#define _MPTCP_H
#include <netinet/in.h> /* for sockaddr_in and sockaddr_in6 */
#include <sys/socket.h> /* for struct sockaddr */
#include <linux/const.h>
#include <linux/types.h>
#include <linux/in.h> /* for sockaddr_in */
#include <linux/in6.h> /* for sockaddr_in6 */
#include <linux/socket.h> /* 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_TOKEN, /* u32 */
MPTCP_PM_ATTR_LOC_ID, /* u8 */
MPTCP_PM_ATTR_ADDR_REMOTE, /* nested address */
__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_ANNOUNCE,
MPTCP_PM_CMD_REMOVE,
MPTCP_PM_CMD_SUBFLOW_CREATE,
MPTCP_PM_CMD_SUBFLOW_DESTROY,
__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;
__u32 mptcpi_retransmits;
__u64 mptcpi_bytes_retrans;
__u64 mptcpi_bytes_sent;
__u64 mptcpi_bytes_received;
__u64 mptcpi_bytes_acked;
};
/*
* 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.
*
* MPTCP_EVENT_LISTENER_CREATED: family, sport, saddr4 | saddr6
* A new PM listener is created.
*
* MPTCP_EVENT_LISTENER_CLOSED: family, sport, saddr4 | saddr6
* A PM listener is closed.
*/
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,
MPTCP_EVENT_LISTENER_CREATED = 15,
MPTCP_EVENT_LISTENER_CLOSED = 16,
};
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_SERVER_SIDE, /* u8 */
__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;
};
};
struct mptcp_subflow_info {
__u32 id;
struct mptcp_subflow_addrs addrs;
};
struct mptcp_full_info {
__u32 size_tcpinfo_kernel; /* must be 0, set by kernel */
__u32 size_tcpinfo_user;
__u32 size_sfinfo_kernel; /* must be 0, set by kernel */
__u32 size_sfinfo_user;
__u32 num_subflows; /* must be 0, set by kernel (real subflow count) */
__u32 size_arrays_user; /* max subflows that userspace is interested in;
* the buffers at subflow_info/tcp_info
* are respectively at least:
* size_arrays * size_sfinfo_user
* size_arrays * size_tcpinfo_user
* bytes wide
*/
__aligned_u64 subflow_info;
__aligned_u64 tcp_info;
struct mptcp_info mptcp_info;
};
/* MPTCP socket options */
#define MPTCP_INFO 1
#define MPTCP_TCPINFO 2
#define MPTCP_SUBFLOW_ADDRS 3
#define MPTCP_FULL_INFO 4
#endif /* _MPTCP_H */
|
