From 728e1c6073cb216d3cb8b66f519bd590458165e6 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Tue, 12 May 2020 18:44:20 +0200
Subject: nat: T2198: add new ipv4-range validator

---
 src/validators/ipv4-range | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100755 src/validators/ipv4-range

(limited to 'src')

diff --git a/src/validators/ipv4-range b/src/validators/ipv4-range
new file mode 100755
index 000000000..0d707d6c5
--- /dev/null
+++ b/src/validators/ipv4-range
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# snippet from https://stackoverflow.com/questions/10768160/ip-address-converter
+ip2dec () {
+    local a b c d ip=$@
+    IFS=. read -r a b c d <<< "$ip"
+    printf '%d\n' "$((a * 256 ** 3 + b * 256 ** 2 + c * 256 + d))"
+}
+
+# This only works with real bash (<<<) - split IP addresses into array with
+# hyphen as delimiter
+readarray -d - -t strarr <<< $1
+
+ipaddrcheck --is-ipv4-single ${strarr[0]}
+if [ $? -gt 0 ]; then
+  exit 1
+fi
+
+ipaddrcheck --is-ipv4-single ${strarr[1]}
+if [ $? -gt 0 ]; then
+  exit 1
+fi
+
+start=$(ip2dec ${strarr[0]})
+stop=$(ip2dec ${strarr[1]})
+if [ $start -ge $stop ]; then
+  exit 1
+fi
+
+exit 0
-- 
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