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Bail out of traceroute if the initial TTL guess probe is not responded

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to. Currently continuing from there leads to pathological behavior where
every hop up to 50 is tried, taking a very long time.
This commit is contained in:
david 2009-08-06 18:47:10 +00:00
parent 960e60c89a
commit 1a3b7c1360
1 changed files with 3 additions and 0 deletions
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traceroute.cc
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@ -1144,6 +1144,9 @@ TraceGroup::retransmissions (vector < TraceProbe * >&retrans) {
if (it->second->probeType () == PROBE_TTL) {
hopDistance = 1;
noDistProbe = true;
/* Give up on this host. We should be able to do a trace against
an unresponsive target but for now it's too slow. */
setState(G_DEAD_TTL);
if (o.verbose)
log_write (LOG_STDOUT, "%s: no reply to our hop distance probe!\n", IPStr ());
} else if (it->second->ttl > MAX_TTL) {