net/netcheck: add missing comment asked for in earlier code review
@@ -673,7 +673,11 @@ func (rs *reportState) probePortMapServices() {
}
if n == 60 && res[0] == 0x02 { // right length and version 2
rs.setOptBool(&rs.report.PCP, true)
- // Delete the mapping.
+
+ // And now delete the mapping.
+ // (PCP is the only protocol of the three that requires
+ // we cause a side effect to detect whether it's present,
+ // so we need to redo that side effect now.)
uc.WriteTo(pcpPacket(myIP, tempPort, true), port5351)
}
}
