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dhcp service example: rewrite "private network to mask" as case statement

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2019-02-08 10:37:05 +01:00
parent 2feaba1d8d
commit 5a387e26c2
1 changed files with 13 additions and 8 deletions
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21
examples/var_service/dhcp_if/convert2ipconf
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@ -29,14 +29,19 @@ test "$ip" || exit 1
# some servers do not return subnet option.
# guess it for standard private networks.
if ! test "$mask"; then
if test "$ip" != "${ip#192.168.}"; then
mask=16
elif test "$ip" != "${ip#172.16.}"; then
mask=12
# repeat for each in 172.17. - 172.31. range?
elif test "$ip" != "${ip#10.}"; then
mask=8
fi
case "$ip" in
10.*)
mask=8;;
192.168.*)
mask=16;;
#172.16-31.x.x
172.1[6789].*)
mask=12;;
172.2[0123456789].*)
mask=12;;
172.3[01].*)
mask=12;;
esac
fi
# some servers do not return router option.