2 /***************************************************************************
3 * timing.h -- Functions related to computing scan timing (such as keeping *
4 * track of and adjusting smoothed round trip times, statistical *
5 * deviations, timeout values, etc. Various user options (such as the *
6 * timing policy (-T)) also play a role in these calculations. *
8 ***********************IMPORTANT NMAP LICENSE TERMS************************
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100 ***************************************************************************/
102 /* $Id: timing.h 3869 2006-08-25 01:47:49Z fyodor $ */
104 #ifndef NMAP_TIMING_H
105 #define NMAP_TIMING_H
108 #include "global_structures.h"
110 /* Call this function on a newly allocated struct timeout_info to
111 initialize the values appropriately */
112 void initialize_timeout_info(struct timeout_info *to);
114 /* Same as adjust_timeouts(), except this one allows you to specify
115 the receive time too (which could be because it was received a while
116 back or it could be for efficiency because the caller already knows
118 void adjust_timeouts2(const struct timeval *sent,
119 const struct timeval *received,
120 struct timeout_info *to);
122 /* Adjust our timeout values based on the time the latest probe took for a
123 response. We update our RTT averages, etc. */
124 void adjust_timeouts(struct timeval sent, struct timeout_info *to);
127 /* Sleeps if necessary to ensure that it isn't called twice within less
128 time than o.send_delay. If it is passed a non-null tv, the POST-SLEEP
129 time is recorded in it */
130 void enforce_scan_delay(struct timeval *tv);
132 class ScanProgressMeter {
134 /* A COPY of stypestr is made and saved for when stats are printed */
135 ScanProgressMeter(char *stypestr);
136 ~ScanProgressMeter();
137 /* Decides whether a timing report is likely to even be
138 printed. There are stringent limitations on how often they are
139 printed, as well as the verbosity level that must exist. So you
140 might as well check this before spending much time computing
141 progress info. now can be NULL if caller doesn't have the current
142 time handy. Just because this function returns true does not mean
143 that the next printStatsIfNeccessary will always print something.
144 It depends on whether time estimates have changed, which this func
145 doesn't even know about. */
146 bool mayBePrinted(const struct timeval *now);
148 /* Prints an estimate of when this scan will complete. It only does
149 so if mayBePrinted() is true, and it seems reasonable to do so
150 because the estimate has changed significantly. Returns whether
151 or not a line was printed.*/
152 bool printStatsIfNeccessary(double perc_done, const struct timeval *now);
154 /* Prints an estimate of when this scan will complete. */
155 bool printStats(double perc_done, const struct timeval *now);
157 /* Prints that this task is complete. */
158 bool endTask(const struct timeval *now, const char *additional_info) { return beginOrEndTask(now, additional_info, false); }
160 struct timeval begin; /* When this ScanProgressMeter was instantiated */
162 struct timeval last_print_test; /* Last time printStatsIfNeccessary was called */
163 struct timeval last_print; /* The most recent time the ETC was printed */
165 struct timeval last_est; /* The latest PRINTED estimate */
167 bool beginOrEndTask(const struct timeval *now, const char *additional_info, bool beginning);
170 #endif /* NMAP_TIMING_H */