finished SRV record data packer. Still need to test exhaustively. Left in debugging code.

packer/type.srv.js

@@ -0,0 +1,73 @@
+(function (exports) {
+'use strict';
+
+// SRV RDATA contains:
+// Priority: The relative priority of this service. 16-bit (range 0-65535)
+// Weight:   Used when more than one serivice has the same priority. 16-bit 
+//           (range 0-65535)
+// Port:     Port number assigned to the symbolic service. 16-bit (range 0-65535)
+// Target:   The name of the host that will provide service.
+
+exports.DNS_PACKER_TYPE_SRV = function (ab, dv, total, record) {
+
+  // maybe these should be changed to 'hasOwnProperty' for all of these
+  // TODO: Check that number is in range 1-64k
+  if (!record.priority){
+    throw new Error("no priority for SRV record");
+  }
+  if (!record.hasOwnProperty('weight')){
+    throw new Error("no weight for SRV record");
+  }
+  if (!record.port){
+    throw new Error("no port for SRV record");
+  }
+  if (!record.target) {
+    throw new Error("no target for SRV record");
+  }
+
+  // console.log("record length, priority, weight, port, then target");
+  // console.log("record priority is: " + record.priority);
+  // console.log("record weight is: " + record.weight);
+  // console.log("record port is: " + record.port);
+  // console.log("record target is: " + record.target);
+  // console.log("total length currently is: " + total);
+  
+
+  var srvLen = 6; // 16-bit priority, weight and port = 6 Bytes
+  var rdLenIndex = total;
+
+  total+=2;
+
+  dv.setUint16(total, parseInt(record.priority, 10), false);
+  total+=2;
+
+  dv.setUint16(total,parseInt(record.weight, 10), false);
+  total+=2;
+
+  dv.setUint16(total, parseInt(record.port, 10), false);
+  total+=2;
+
+  record.target.split('.').forEach(function (label){
+    srvLen += 1 + label.length;
+
+    dv.setUint8(total, label.length, false);
+    total += 1;
+
+    label.split('').forEach(function (ch) {
+      dv.setUint8(total, ch.charCodeAt(0), false);
+      total +=1;
+    });
+  });
+
+
+  // RDLENGTH
+
+  dv.setUint16(rdLenIndex, srvLen, false);
+  
+  
+
+
+  return total;
+};
+
+}('undefined' !== typeof window ? window : exports));