Replace dig/massdns CNAME fallback with dnsx for parallel DNS resolution

router/functions

@@ -164,14 +164,15 @@ get_ipv4_list_bulk()
         print $2
     }'
 
-    # Fallback for CNAME domains: parallel dig
+    # Fallback for CNAME domains via dnsx (fast parallel resolver)
     local cname_domains=$(mktemp)
     grep "^;" "$adns_out" | grep -v 'nxdomain\|nodata\|timeout\|querydomaintoolong' | \
         awk '{ for(i=4;i<=NF;i++) if($i ~ /^[a-z0-9].*\.[a-z]/) { print $i; break } }' | \
         sort -u > "$cname_domains"
     if [ -s "$cname_domains" ] ; then
-        xargs -P 20 -I{} dig +short {} A < "$cname_domains" 2>/dev/null
-        [ -n "$EXTRA_DNS" ] && xargs -P 20 -I{} dig @$EXTRA_DNS +short {} A < "$cname_domains" 2>/dev/null || true
+        local resolvers="$(awk '/^nameserver/ {print $2}' /etc/resolv.conf | paste -sd,)"
+        [ -n "$EXTRA_DNS" ] && resolvers="$resolvers,$EXTRA_DNS"
+        dnsx -a -resp-only -silent -r "$resolvers" -t 50 < "$cname_domains" 2>/dev/null
     fi
     rm -f "$cname_domains"
 }
@@ -209,18 +210,15 @@ get_ipv6_list_bulk()
         print $2
     }'
 
-    # Fallback for CNAME domains via massdns (fast parallel resolver)
+    # Fallback for CNAME domains via dnsx (fast parallel resolver)
     local cname_domains=$(mktemp)
     grep "^;" "$adns_out" | grep -v 'nxdomain\|nodata\|timeout\|querydomaintoolong' | \
         awk '{ for(i=4;i<=NF;i++) if($i ~ /^[a-z0-9].*\.[a-z]/) { print $i; break } }' | \
         sort -u > "$cname_domains"
     if [ -s "$cname_domains" ] ; then
-        local resolvers=$(mktemp)
-        awk '/^nameserver/ {print $2}' /etc/resolv.conf > "$resolvers"
-        [ -n "$EXTRA_DNS" ] && echo "$EXTRA_DNS" >> "$resolvers"
-        massdns -r "$resolvers" -t AAAA -o S --quiet < "$cname_domains" 2>/dev/null | \
-            awk '/ AAAA / { sub(/\.$/, "", $3); print $3 }'
-        rm -f "$resolvers"
+        local resolvers="$(awk '/^nameserver/ {print $2}' /etc/resolv.conf | paste -sd,)"
+        [ -n "$EXTRA_DNS" ] && resolvers="$resolvers,$EXTRA_DNS"
+        dnsx -aaaa -resp-only -silent -r "$resolvers" -t 50 < "$cname_domains" 2>/dev/null
     fi
     rm -f "$cname_domains"
 }