From d5447330844a1f16d927d42cd1d96c5425133aad Mon Sep 17 00:00:00 2001

From: Harald Hoyer <harald@redhat.com>

Date: Wed, 12 Aug 2015 14:24:05 +0200

Subject: [PATCH] network/net-lib.sh: add is_ip()

add function to test if string is a valid IP

(cherry picked from commit 01b23b6900eabefbfd1f589b9f12c8ff38c5afc0)

---

 modules.d/40network/net-lib.sh | 12 ++++++++++++

 1 file changed, 12 insertions(+)

diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh

index cfc06fe..44c1bf0 100755

--- a/modules.d/40network/net-lib.sh

+++ b/modules.d/40network/net-lib.sh

@@ -2,6 +2,18 @@

 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-

 # ex: ts=8 sw=4 sts=4 et filetype=sh

+is_ip() {

+    echo "$1" | {

+        IFS=. read a b c d

+        test "$a" -ge 0 -a "$a" -le 255 \

+             -a "$b" -ge 0 -a "$b" -le 255 \

+             -a "$c" -ge 0 -a "$c" -le 255 \

+             -a "$d" -ge 0 -a "$d" -le 255 \

+             2> /dev/null

+    } && return 0

+    return 1

+}

+

 get_ip() {

     local iface="$1" ip=""

     ip=$(ip -o -f inet addr show $iface)