5a387e26c
Denys Vlasenko
2019-02-08
Subject
dhcp service example: rewrite "private network to mask" as case statement
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examples/var_service/dhcp_if/convert2ipconf+13 -8
| @@ -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. | |