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Avoid matching ARP/ND response with probes sent after it was received. Fixes #863

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dmiller
2019-02-26 19:59:34 +00:00
parent 504e9d767e
commit f519e64b1d
2 changed files with 13 additions and 2 deletions
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12
scan_engine_raw.cc
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@@ -1594,7 +1594,11 @@ bool get_arp_result(UltraScanInfo *USI, struct timeval *stime) {
continue;
}
probeI = hss->probes_outstanding.end();
probeI--;
do {
/* Delay in libpcap could mean we sent another probe *after* this
* response was received. Search back for the last probe before rcvdtime. */
probeI--;
} while (TIMEVAL_AFTER((*probeI)->sent, rcvdtime) && probeI != hss->probes_outstanding.begin());
ultrascan_host_probe_update(USI, hss, probeI, HOST_UP, &rcvdtime);
/* Now that we know the host is up, we can forget our other probes. */
hss->destroyAllOutstandingProbes();
@@ -1666,7 +1670,11 @@ bool get_ns_result(UltraScanInfo *USI, struct timeval *stime) {
/* TODO: I suppose I should really mark the @@# host as up */
}
probeI = hss->probes_outstanding.end();
probeI--;
do {
/* Delay in libpcap could mean we sent another probe *after* this
* response was received. Search back for the last probe before rcvdtime. */
probeI--;
} while (TIMEVAL_AFTER((*probeI)->sent, rcvdtime) && probeI != hss->probes_outstanding.begin());
ultrascan_host_probe_update(USI, hss, probeI, HOST_UP, &rcvdtime);
/* Now that we know the host is up, we can forget our other probes. */
hss->destroyAllOutstandingProbes();