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Note with what I've found with the simultaneous host discovery problem.

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david
2012-03-20 01:22:08 +00:00
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todo/nmap.txt
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@@ -7,6 +7,15 @@ o Deal with the issue of timeouts happening too soon due to global
and cause the 2nd host (which doesn't have any host-based congestion
control values yet) to timeout arguably too quickly. We should look
at potential algorithm changes to improve this.
David: I think I was wrong about the cause of this. Even when
replies come back very quickly, the timeout is by default limited
to 100000 microseconds, much higher than the straightforward
calculation would give. What I think is really happening is that
select is not working reliably on this platform (Solaris 10 x86).
In the loop in read_arp_reply_pcap, pcap_select returns 1, then a
pcap_next is done. Then pcap_select returns 0, but if I insert
another pcap_next after that, the pcap_next finds another packet
without blocking (the first time, anyway; after that it blocks).
o Prepare release notes, web page, etc.