accel-ppp: T5688: Standardized pool configuration in accel-ppp

Standardized pool configuration for all accel-ppp services.
1. Only named pools are used now.
2. Allows all services to use range in x.x.x.x/mask
   and x.x.x.x-x.x.x.y format
3. next-pool can be used in all services
2. Allows to use in ipoe gw-ip-address without pool configuration
   which allows to use Fraimed-IP-Address attribute by radius.
3. Default pool name should be explicidly configured
   with default-pool.
4. In ipoe netmask and range subnet can be different.

(cherry picked from commit 422eb463d413da812eabc28706e507a9910d7b53)

1 files changed, 59 insertions, 0 deletions

diff --git a/src/validators/ipv4-range-mask b/src/validators/ipv4-range-mask
new file mode 100755
index 000000000..7bb4539af
--- /dev/null
+++ b/src/validators/ipv4-range-mask
@@ -0,0 +1,59 @@
+#!/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 or these IPs are not under /$2"
+  exit 1
+}
+
+# Check if address range is under the same netmask
+# -m - mask
+# -r - IP range in format x.x.x.x-y.y.y.y
+while getopts m:r: flag
+do
+    case "${flag}" in
+        m) mask=${OPTARG};;
+        r) range=${OPTARG}
+    esac
+done
+if [[ "${range}" =~ "-" ]]&&[[ ! -z ${mask} ]]; then
+  # This only works with real bash (<<<) - split IP addresses into array with
+  # hyphen as delimiter
+  readarray -d - -t strarr <<< ${range}
+
+  ipaddrcheck --is-ipv4-single ${strarr[0]}
+  if [ $? -gt 0 ]; then
+    error_exit ${range} ${mask}
+  fi
+
+  ipaddrcheck --is-ipv4-single ${strarr[1]}
+  if [ $? -gt 0 ]; then
+    error_exit ${range} ${mask}
+  fi
+
+  ${vyos_validators_dir}/numeric --range 0-32 ${mask} > /dev/null
+   if [ $? -ne 0 ]; then
+     error_exit ${range} ${mask}
+   fi
+
+  is_in_24=$( grepcidr ${strarr[0]}"/"${mask} <(echo ${strarr[1]}) )
+  if [ -z $is_in_24 ]; then
+    error_exit ${range} ${mask}
+  fi
+
+  start=$(ip2dec ${strarr[0]})
+  stop=$(ip2dec ${strarr[1]})
+  if [ $start -ge $stop ]; then
+    error_exit ${range} ${mask}
+  fi
+
+  exit 0
+fi
+
+error_exit ${range} ${mask}