When translating the interface name when "eth?" is given, do not use the internal index number as the unit number to compare with. The first ethernet interface in Linux is called "eth0", whereas our internal index starts wth 1 and is not unique to ethernet interfaces (lo0 has index 1 for example). Instead, use a function- local index number that starts with 0 and is incremented only for ethernet interfaces. This way the unit number will match the n-th ethernet interface in the system, which is exactly what it means in Linux.
When translating the interface name when "eth?" is given, do not
use the internal index number as the unit number to compare with.
The first ethernet interface in Linux is called "eth0", whereas
our internal index starts wth 1 and is not unique to ethernet
interfaces (lo0 has index 1 for example). Instead, use a function-
local index number that starts with 0 and is incremented only
for ethernet interfaces. This way the unit number will match the
n-th ethernet interface in the system, which is exactly what it
means in Linux.

Tested by: Glenn Johnson <gjohnson@srrc.ars.usda.gov>
MFC after: 3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase