/* 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,
  	TCP_METRIC_RTTVAR,
  	TCP_METRIC_SSTHRESH,
  	TCP_METRIC_CWND,
  	TCP_METRIC_REORDERING,
  
  	/* 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_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 */