1 files changed, 40 insertions, 0 deletions
diff --git a/src/validators/ipv4-range b/src/validators/ipv4-range
new file mode 100644
index 0000000..6492bfc
--- /dev/null
+++ b/src/validators/ipv4-range
@@ -0,0 +1,40 @@
+#!/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))"
+}
+
+error_exit() {
+  echo "Error: $1 is not a valid IPv4 address range"
+  exit 1
+}
+
+# Only run this if there is a hypen present in $1
+if [[ "$1" =~ "-" ]]; then
+  # 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
+    error_exit $1
+  fi
+
+  ipaddrcheck --is-ipv4-single ${strarr[1]}
+  if [ $? -gt 0 ]; then
+    error_exit $1
+  fi
+
+  start=$(ip2dec ${strarr[0]})
+  stop=$(ip2dec ${strarr[1]})
+  if [ $start -ge $stop ]; then
+    error_exit $1
+  fi
+
+  exit 0
+fi
+
+error_exit $1