david 90ba6b97d0 Merge from /nmap-exp/david/nmap-perf. A summary of changes: ...

Don't make a host the global ping host until it moves to the completed
hosts list, and only change the global ping probe if the new probe is no
worse than the old (according to pingprobe_is_better).

Restore the ping magnifier for host congestion window updates.

Ignore the timing of certain ICMP errors that are likely to be rate
limited and don't change the port or host state. Avoid making timing
pings out of probes that elicit such errors. This used to be done only
for port scans and only at -T4 and above (and didn't prohibit the
creation of timing pings). Now it is done for host discovery too, and at
all timing levels.

Gracefully handle updates from the recent past in RateMeter. Doesn't
affect performance, but avoids a rare assertion failure.

2009-01-08 22:54:07 +00:00

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