diff options
Diffstat (limited to 'freebsd/sys/netinet/tcp_seq.h')
| -rw-r--r-- | freebsd/sys/netinet/tcp_seq.h | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/freebsd/sys/netinet/tcp_seq.h b/freebsd/sys/netinet/tcp_seq.h index f58b537c..51d971f2 100644 --- a/freebsd/sys/netinet/tcp_seq.h +++ b/freebsd/sys/netinet/tcp_seq.h @@ -62,7 +62,34 @@ (tp)->snd_una = (tp)->snd_nxt = (tp)->snd_max = (tp)->snd_up = \ (tp)->snd_recover = (tp)->iss -#define TCP_PAWS_IDLE (24 * 24 * 60 * 60 * hz) - /* timestamp wrap-around time */ +#ifdef _KERNEL +/* + * Clock macros for RFC 1323 timestamps. + */ +#define TCP_TS_TO_TICKS(_t) ((_t) * hz / 1000) + +/* Timestamp wrap-around time, 24 days. */ +#define TCP_PAWS_IDLE (24 * 24 * 60 * 60 * 1000) + +/* + * tcp_ts_getticks() in ms, should be 1ms < x < 1000ms according to RFC 1323. + * We always use 1ms granularity independent of hz. + */ +static __inline u_int +tcp_ts_getticks(void) +{ + struct timeval tv; + u_long ms; + + /* + * getmicrouptime() should be good enough for any 1-1000ms granularity. + * Do not use getmicrotime() here as it might break nfsroot/tcp. + */ + getmicrouptime(&tv); + ms = tv.tv_sec * 1000 + tv.tv_usec / 1000; + + return (ms); +} +#endif /* _KERNEL */ #endif /* _NETINET_TCP_SEQ_H_ */ |