When using the ifName or ifDescr as means to map discovered ports to
known ports in the DB (think of port association mode) it's possible
that we're facing the problem that the ifName or ifDescr polled from
the device is unset or an empty string (like when querying some ubnt
devices...). If this happends we have no way to map this port to any
port found in the database. As reported this situation may occur for
the time of one poll and might resolve automagically before the next
poller run happens. Without this special case this would lead to new
ports added to the database each time this situation occurs. To give
the user the choice between »a lot of new ports« and »some poll runs
are missed but ports stay stable« the 'ignore_unmapable_port' option
has been added to configure this behaviour. To skip the port in this
loop is sufficient as the next loop is looping only over ports found
in the database and "maps back". As we did not add a new port to the
DB here, there's no port to be mapped to.
I'm using the in_array() check here, as I'm not sure if an "ifIndex"
can be legally set to 0, which would yield True when checking if the
value is empty().
Signed-off-by: Maximilian Wilhelm <[email protected]>
Maximilian Wilhelm
79eab54fd9