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 
14 enum 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 enum {
31 	TCP_METRICS_ATTR_UNSPEC,
32 	TCP_METRICS_ATTR_ADDR_IPV4,		/* u32 */
33 	TCP_METRICS_ATTR_ADDR_IPV6,		/* binary */
34 	TCP_METRICS_ATTR_AGE,			/* msecs */
35 	TCP_METRICS_ATTR_TW_TSVAL,		/* u32, raw, rcv tsval */
36 	TCP_METRICS_ATTR_TW_TS_STAMP,		/* s32, sec age */
37 	TCP_METRICS_ATTR_VALS,			/* nested +1, u32 */
38 	TCP_METRICS_ATTR_FOPEN_MSS,		/* u16 */
39 	TCP_METRICS_ATTR_FOPEN_SYN_DROPS,	/* u16, count of drops */
40 	TCP_METRICS_ATTR_FOPEN_SYN_DROP_TS,	/* msecs age */
41 	TCP_METRICS_ATTR_FOPEN_COOKIE,		/* binary */
42 	TCP_METRICS_ATTR_SADDR_IPV4,		/* u32 */
43 	TCP_METRICS_ATTR_SADDR_IPV6,		/* binary */
44 	TCP_METRICS_ATTR_PAD,
45 
46 	__TCP_METRICS_ATTR_MAX,
47 };
48 
49 #define TCP_METRICS_ATTR_MAX	(__TCP_METRICS_ATTR_MAX - 1)
50 
51 enum {
52 	TCP_METRICS_CMD_UNSPEC,
53 	TCP_METRICS_CMD_GET,
54 	TCP_METRICS_CMD_DEL,
55 
56 	__TCP_METRICS_CMD_MAX,
57 };
58 
59 #define TCP_METRICS_CMD_MAX	(__TCP_METRICS_CMD_MAX - 1)
60 
61 #endif /* _LINUX_TCP_METRICS_H */
62