1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2/* tcp_metrics.h - TCP Metrics Interface */
 3
 4#ifndef _LINUX_TCP_METRICS_H
 5#define _LINUX_TCP_METRICS_H
 6
 7#include <linux/types.h>
 8
 9/* NETLINK_GENERIC related info
10 */
11#define TCP_METRICS_GENL_NAME		"tcp_metrics"
12#define TCP_METRICS_GENL_VERSION	0x1
13
14enum tcp_metric_index {
15	TCP_METRIC_RTT,		/* in ms units */
16	TCP_METRIC_RTTVAR,	/* in ms units */
17	TCP_METRIC_SSTHRESH,
18	TCP_METRIC_CWND,
19	TCP_METRIC_REORDERING,
20
21	TCP_METRIC_RTT_US,	/* in usec units */
22	TCP_METRIC_RTTVAR_US,	/* in usec units */
23
24	/* Always last.  */
25	__TCP_METRIC_MAX,
26};
27
28#define TCP_METRIC_MAX	(__TCP_METRIC_MAX - 1)
29
30/* Re-define enum tcp_metric_index, again, using the values carried
31 * as netlink attribute types.
32 */
33enum {
34	TCP_METRICS_A_METRICS_RTT = 1,
35	TCP_METRICS_A_METRICS_RTTVAR,
36	TCP_METRICS_A_METRICS_SSTHRESH,
37	TCP_METRICS_A_METRICS_CWND,
38	TCP_METRICS_A_METRICS_REODERING,
39	TCP_METRICS_A_METRICS_RTT_US,
40	TCP_METRICS_A_METRICS_RTTVAR_US,
41
42	__TCP_METRICS_A_METRICS_MAX
43};
44#define TCP_METRICS_A_METRICS_MAX (__TCP_METRICS_A_METRICS_MAX - 1)
45
46enum {
47	TCP_METRICS_ATTR_UNSPEC,
48	TCP_METRICS_ATTR_ADDR_IPV4,		/* u32 */
49	TCP_METRICS_ATTR_ADDR_IPV6,		/* binary */
50	TCP_METRICS_ATTR_AGE,			/* msecs */
51	TCP_METRICS_ATTR_TW_TSVAL,		/* u32, raw, rcv tsval */
52	TCP_METRICS_ATTR_TW_TS_STAMP,		/* s32, sec age */
53	TCP_METRICS_ATTR_VALS,			/* nested +1, u32 */
54	TCP_METRICS_ATTR_FOPEN_MSS,		/* u16 */
55	TCP_METRICS_ATTR_FOPEN_SYN_DROPS,	/* u16, count of drops */
56	TCP_METRICS_ATTR_FOPEN_SYN_DROP_TS,	/* msecs age */
57	TCP_METRICS_ATTR_FOPEN_COOKIE,		/* binary */
58	TCP_METRICS_ATTR_SADDR_IPV4,		/* u32 */
59	TCP_METRICS_ATTR_SADDR_IPV6,		/* binary */
60	TCP_METRICS_ATTR_PAD,
61
62	__TCP_METRICS_ATTR_MAX,
63};
64
65#define TCP_METRICS_ATTR_MAX	(__TCP_METRICS_ATTR_MAX - 1)
66
67enum {
68	TCP_METRICS_CMD_UNSPEC,
69	TCP_METRICS_CMD_GET,
70	TCP_METRICS_CMD_DEL,
71
72	__TCP_METRICS_CMD_MAX,
73};
74
75#define TCP_METRICS_CMD_MAX	(__TCP_METRICS_CMD_MAX - 1)
76
77#endif /* _LINUX_TCP_METRICS_H */