tested soa packer. It works, but doesn't utilize compression pointers to full capabilities

packer/type.soa.js

@@ -27,7 +27,7 @@ exports.DNS_PACKER_TYPE_SOA = function (ab, dv, total, record) {
   }
   if(!record.ret){
     throw new Error("no serial number for SOA record");
-  }  
+  }
   if(!record.ex){
     throw new Error("no serial number for SOA record");
   }
@@ -35,7 +35,7 @@ exports.DNS_PACKER_TYPE_SOA = function (ab, dv, total, record) {
     throw new Error("no serial number for SOA record");
   }
 
-  var soaLen = 20; // take into account sn, ref, ret, ex, and nx 
+  var soaLen = 20; // take into account sn, ref, ret, ex, and nx
                   //  (32-bits each. 4Bytes * 5 = 20)
   var rdLenIndex = total;
   total += 2; // Save space for RDLENGTH
@@ -72,7 +72,7 @@ exports.DNS_PACKER_TYPE_SOA = function (ab, dv, total, record) {
   dv.setUint32(total, parseInt(record.ref, 10), false);
   total+=4;
   dv.setUint32(total, parseInt(record.ret, 10), false);
-  total+=4;  
+  total+=4;
   dv.setUint32(total, parseInt(record.ex, 10), false);
   total+=4;
   dv.setUint32(total, parseInt(record.nx, 10), false);