root/include/uapi/linux/tcp_metrics.h

/* tcp_metrics.h - TCP Metrics Interface */

#ifndef _LINUX_TCP_METRICS_H
#define _LINUX_TCP_METRICS_H

#include <linux/types.h>

/* NETLINK_GENERIC related info
 */
#define TCP_METRICS_GENL_NAME           "tcp_metrics"
#define TCP_METRICS_GENL_VERSION        0x1

enum tcp_metric_index {
        TCP_METRIC_RTT,         /* in ms units */
        TCP_METRIC_RTTVAR,      /* in ms units */
        TCP_METRIC_SSTHRESH,
        TCP_METRIC_CWND,
        TCP_METRIC_REORDERING,

        TCP_METRIC_RTT_US,      /* in usec units */
        TCP_METRIC_RTTVAR_US,   /* in usec units */

        /* Always last.  */
        __TCP_METRIC_MAX,
};

#define TCP_METRIC_MAX  (__TCP_METRIC_MAX - 1)

enum {
        TCP_METRICS_ATTR_UNSPEC,
        TCP_METRICS_ATTR_ADDR_IPV4,             /* u32 */
        TCP_METRICS_ATTR_ADDR_IPV6,             /* binary */
        TCP_METRICS_ATTR_AGE,                   /* msecs */
        TCP_METRICS_ATTR_TW_TSVAL,              /* u32, raw, rcv tsval */
        TCP_METRICS_ATTR_TW_TS_STAMP,           /* s32, sec age */
        TCP_METRICS_ATTR_VALS,                  /* nested +1, u32 */
        TCP_METRICS_ATTR_FOPEN_MSS,             /* u16 */
        TCP_METRICS_ATTR_FOPEN_SYN_DROPS,       /* u16, count of drops */
        TCP_METRICS_ATTR_FOPEN_SYN_DROP_TS,     /* msecs age */
        TCP_METRICS_ATTR_FOPEN_COOKIE,          /* binary */
        TCP_METRICS_ATTR_SADDR_IPV4,            /* u32 */
        TCP_METRICS_ATTR_SADDR_IPV6,            /* binary */

        __TCP_METRICS_ATTR_MAX,
};

#define TCP_METRICS_ATTR_MAX    (__TCP_METRICS_ATTR_MAX - 1)

enum {
        TCP_METRICS_CMD_UNSPEC,
        TCP_METRICS_CMD_GET,
        TCP_METRICS_CMD_DEL,

        __TCP_METRICS_CMD_MAX,
};

#define TCP_METRICS_CMD_MAX     (__TCP_METRICS_CMD_MAX - 1)

#endif /* _LINUX_TCP_METRICS_H */