resolve CNAME to IP

load/01-basic

@@ -59,7 +59,7 @@ rsynchg() { rsync --help | grep "\-$1"; }
 
 gip () {
   if which jq &> /dev/null; then
-  curl -s "https://dns.google/resolve?name=$1" | jq -r '.Answer[] | .data'
+  curl -s "https://dns.google/resolve?name=$1" | jq -r '.Answer[] | .data' | tail -n 1
   return 0
   else
   echo install jq to use this function
@@ -72,6 +72,23 @@ gpip () {
 } 
 
 
-dip () {
+valid_ipv4() {
-/bin/drill $1 | grep -A1 'ANSWER SECTION' | grep -v "ANSWER SECTION"  | rev | cut -f1 | rev
+  local ip="$1"
+  [[ "$ip" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}$ ]] || return 1
+  for i in ${ip//./ }; do
+      [[ "${#i}" -gt 1 && "${i:0:1}" == 0 ]] && return 1
+      [[ "$i" -gt 255 ]] && return 1
+  done
+  return 0
 }
+
+dip () {
+  local ip4 
+  ip4=$(/bin/drill $1 | grep -A1 'ANSWER SECTION' | grep -v "ANSWER SECTION"  | rev | cut -f1 | rev)
+  # echo first: $ip4
+  if valid_ipv4 $ip4; then
+  echo $ip4
+  else
+  /bin/drill $ip4 | grep -A1 'ANSWER SECTION' | grep -v "ANSWER SECTION"  | rev | cut -f1 | rev  
+  fi
+}