Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2#ifndef _UAPI_MPTCP_H
3#define _UAPI_MPTCP_H
4
5#include <linux/const.h>
6#include <linux/types.h>
7
8#define MPTCP_SUBFLOW_FLAG_MCAP_REM _BITUL(0)
9#define MPTCP_SUBFLOW_FLAG_MCAP_LOC _BITUL(1)
10#define MPTCP_SUBFLOW_FLAG_JOIN_REM _BITUL(2)
11#define MPTCP_SUBFLOW_FLAG_JOIN_LOC _BITUL(3)
12#define MPTCP_SUBFLOW_FLAG_BKUP_REM _BITUL(4)
13#define MPTCP_SUBFLOW_FLAG_BKUP_LOC _BITUL(5)
14#define MPTCP_SUBFLOW_FLAG_FULLY_ESTABLISHED _BITUL(6)
15#define MPTCP_SUBFLOW_FLAG_CONNECTED _BITUL(7)
16#define MPTCP_SUBFLOW_FLAG_MAPVALID _BITUL(8)
17
18enum {
19 MPTCP_SUBFLOW_ATTR_UNSPEC,
20 MPTCP_SUBFLOW_ATTR_TOKEN_REM,
21 MPTCP_SUBFLOW_ATTR_TOKEN_LOC,
22 MPTCP_SUBFLOW_ATTR_RELWRITE_SEQ,
23 MPTCP_SUBFLOW_ATTR_MAP_SEQ,
24 MPTCP_SUBFLOW_ATTR_MAP_SFSEQ,
25 MPTCP_SUBFLOW_ATTR_SSN_OFFSET,
26 MPTCP_SUBFLOW_ATTR_MAP_DATALEN,
27 MPTCP_SUBFLOW_ATTR_FLAGS,
28 MPTCP_SUBFLOW_ATTR_ID_REM,
29 MPTCP_SUBFLOW_ATTR_ID_LOC,
30 MPTCP_SUBFLOW_ATTR_PAD,
31 __MPTCP_SUBFLOW_ATTR_MAX
32};
33
34#define MPTCP_SUBFLOW_ATTR_MAX (__MPTCP_SUBFLOW_ATTR_MAX - 1)
35
36/* netlink interface */
37#define MPTCP_PM_NAME "mptcp_pm"
38#define MPTCP_PM_CMD_GRP_NAME "mptcp_pm_cmds"
39#define MPTCP_PM_EV_GRP_NAME "mptcp_pm_events"
40#define MPTCP_PM_VER 0x1
41
42/*
43 * ATTR types defined for MPTCP
44 */
45enum {
46 MPTCP_PM_ATTR_UNSPEC,
47
48 MPTCP_PM_ATTR_ADDR, /* nested address */
49 MPTCP_PM_ATTR_RCV_ADD_ADDRS, /* u32 */
50 MPTCP_PM_ATTR_SUBFLOWS, /* u32 */
51
52 __MPTCP_PM_ATTR_MAX
53};
54
55#define MPTCP_PM_ATTR_MAX (__MPTCP_PM_ATTR_MAX - 1)
56
57enum {
58 MPTCP_PM_ADDR_ATTR_UNSPEC,
59
60 MPTCP_PM_ADDR_ATTR_FAMILY, /* u16 */
61 MPTCP_PM_ADDR_ATTR_ID, /* u8 */
62 MPTCP_PM_ADDR_ATTR_ADDR4, /* struct in_addr */
63 MPTCP_PM_ADDR_ATTR_ADDR6, /* struct in6_addr */
64 MPTCP_PM_ADDR_ATTR_PORT, /* u16 */
65 MPTCP_PM_ADDR_ATTR_FLAGS, /* u32 */
66 MPTCP_PM_ADDR_ATTR_IF_IDX, /* s32 */
67
68 __MPTCP_PM_ADDR_ATTR_MAX
69};
70
71#define MPTCP_PM_ADDR_ATTR_MAX (__MPTCP_PM_ADDR_ATTR_MAX - 1)
72
73#define MPTCP_PM_ADDR_FLAG_SIGNAL (1 << 0)
74#define MPTCP_PM_ADDR_FLAG_SUBFLOW (1 << 1)
75#define MPTCP_PM_ADDR_FLAG_BACKUP (1 << 2)
76
77enum {
78 MPTCP_PM_CMD_UNSPEC,
79
80 MPTCP_PM_CMD_ADD_ADDR,
81 MPTCP_PM_CMD_DEL_ADDR,
82 MPTCP_PM_CMD_GET_ADDR,
83 MPTCP_PM_CMD_FLUSH_ADDRS,
84 MPTCP_PM_CMD_SET_LIMITS,
85 MPTCP_PM_CMD_GET_LIMITS,
86 MPTCP_PM_CMD_SET_FLAGS,
87
88 __MPTCP_PM_CMD_AFTER_LAST
89};
90
91#define MPTCP_INFO_FLAG_FALLBACK _BITUL(0)
92#define MPTCP_INFO_FLAG_REMOTE_KEY_RECEIVED _BITUL(1)
93
94struct mptcp_info {
95 __u8 mptcpi_subflows;
96 __u8 mptcpi_add_addr_signal;
97 __u8 mptcpi_add_addr_accepted;
98 __u8 mptcpi_subflows_max;
99 __u8 mptcpi_add_addr_signal_max;
100 __u8 mptcpi_add_addr_accepted_max;
101 __u32 mptcpi_flags;
102 __u32 mptcpi_token;
103 __u64 mptcpi_write_seq;
104 __u64 mptcpi_snd_una;
105 __u64 mptcpi_rcv_nxt;
106 __u8 mptcpi_local_addr_used;
107 __u8 mptcpi_local_addr_max;
108 __u8 mptcpi_csum_enabled;
109};
110
111/*
112 * MPTCP_EVENT_CREATED: token, family, saddr4 | saddr6, daddr4 | daddr6,
113 * sport, dport
114 * A new MPTCP connection has been created. It is the good time to allocate
115 * memory and send ADD_ADDR if needed. Depending on the traffic-patterns
116 * it can take a long time until the MPTCP_EVENT_ESTABLISHED is sent.
117 *
118 * MPTCP_EVENT_ESTABLISHED: token, family, saddr4 | saddr6, daddr4 | daddr6,
119 * sport, dport
120 * A MPTCP connection is established (can start new subflows).
121 *
122 * MPTCP_EVENT_CLOSED: token
123 * A MPTCP connection has stopped.
124 *
125 * MPTCP_EVENT_ANNOUNCED: token, rem_id, family, daddr4 | daddr6 [, dport]
126 * A new address has been announced by the peer.
127 *
128 * MPTCP_EVENT_REMOVED: token, rem_id
129 * An address has been lost by the peer.
130 *
131 * MPTCP_EVENT_SUB_ESTABLISHED: token, family, saddr4 | saddr6,
132 * daddr4 | daddr6, sport, dport, backup,
133 * if_idx [, error]
134 * A new subflow has been established. 'error' should not be set.
135 *
136 * MPTCP_EVENT_SUB_CLOSED: token, family, saddr4 | saddr6, daddr4 | daddr6,
137 * sport, dport, backup, if_idx [, error]
138 * A subflow has been closed. An error (copy of sk_err) could be set if an
139 * error has been detected for this subflow.
140 *
141 * MPTCP_EVENT_SUB_PRIORITY: token, family, saddr4 | saddr6, daddr4 | daddr6,
142 * sport, dport, backup, if_idx [, error]
143 * The priority of a subflow has changed. 'error' should not be set.
144 */
145enum mptcp_event_type {
146 MPTCP_EVENT_UNSPEC = 0,
147 MPTCP_EVENT_CREATED = 1,
148 MPTCP_EVENT_ESTABLISHED = 2,
149 MPTCP_EVENT_CLOSED = 3,
150
151 MPTCP_EVENT_ANNOUNCED = 6,
152 MPTCP_EVENT_REMOVED = 7,
153
154 MPTCP_EVENT_SUB_ESTABLISHED = 10,
155 MPTCP_EVENT_SUB_CLOSED = 11,
156
157 MPTCP_EVENT_SUB_PRIORITY = 13,
158};
159
160enum mptcp_event_attr {
161 MPTCP_ATTR_UNSPEC = 0,
162
163 MPTCP_ATTR_TOKEN, /* u32 */
164 MPTCP_ATTR_FAMILY, /* u16 */
165 MPTCP_ATTR_LOC_ID, /* u8 */
166 MPTCP_ATTR_REM_ID, /* u8 */
167 MPTCP_ATTR_SADDR4, /* be32 */
168 MPTCP_ATTR_SADDR6, /* struct in6_addr */
169 MPTCP_ATTR_DADDR4, /* be32 */
170 MPTCP_ATTR_DADDR6, /* struct in6_addr */
171 MPTCP_ATTR_SPORT, /* be16 */
172 MPTCP_ATTR_DPORT, /* be16 */
173 MPTCP_ATTR_BACKUP, /* u8 */
174 MPTCP_ATTR_ERROR, /* u8 */
175 MPTCP_ATTR_FLAGS, /* u16 */
176 MPTCP_ATTR_TIMEOUT, /* u32 */
177 MPTCP_ATTR_IF_IDX, /* s32 */
178 MPTCP_ATTR_RESET_REASON,/* u32 */
179 MPTCP_ATTR_RESET_FLAGS, /* u32 */
180
181 __MPTCP_ATTR_AFTER_LAST
182};
183
184#define MPTCP_ATTR_MAX (__MPTCP_ATTR_AFTER_LAST - 1)
185
186/* MPTCP Reset reason codes, rfc8684 */
187#define MPTCP_RST_EUNSPEC 0
188#define MPTCP_RST_EMPTCP 1
189#define MPTCP_RST_ERESOURCE 2
190#define MPTCP_RST_EPROHIBIT 3
191#define MPTCP_RST_EWQ2BIG 4
192#define MPTCP_RST_EBADPERF 5
193#define MPTCP_RST_EMIDDLEBOX 6
194
195#endif /* _UAPI_MPTCP_H */