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- #ifndef __unp_rtt_h
- #define __unp_rtt_h
- #include "unp.h"
- struct rtt_info {
- float rtt_rtt; /* most recent measured RTT, in seconds */
- float rtt_srtt; /* smoothed RTT estimator, in seconds */
- float rtt_rttvar; /* smoothed mean deviation, in seconds */
- float rtt_rto; /* current RTO to use, in seconds */
- int rtt_nrexmt; /* # times retransmitted: 0, 1, 2, ... */
- uint32_t rtt_base; /* # sec since 1/1/1970 at start */
- };
- #define RTT_RXTMIN 2 /* min retransmit timeout value, in seconds */
- #define RTT_RXTMAX 60 /* max retransmit timeout value, in seconds */
- #define RTT_MAXNREXMT 3 /* max # times to retransmit */
- /* function prototypes */
- void rtt_debug(struct rtt_info *);
- void rtt_init(struct rtt_info *);
- void rtt_newpack(struct rtt_info *);
- int rtt_start(struct rtt_info *);
- void rtt_stop(struct rtt_info *, uint32_t);
- int rtt_timeout(struct rtt_info *);
- uint32_t rtt_ts(struct rtt_info *);
- extern int rtt_d_flag; /* can be set to nonzero for addl info */
- #endif /* __unp_rtt_h */
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