add option to listen on specified address #45
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#44 reworked
verification
I expect no behavior change if
sflowtool
is run w/o-b
. Output ofnetstat -npl | fgrep sflow
is attached for verification.listening on implicit any
sflowtool
sflowtool -4
sflowtool -6
listening on explicit any
sflowtool -4 -b 0.0.0.0
sflowtool -6 -b ::
listening on localhost
sflowtool -4 -b 127.0.0.1
sflowtool -6 -b ::1
listening on arbitrary IP
sflowtool -4 -b 192.168.8.1
wrong AFI or malformed IP