diff --git a/digest.js b/digest.js
index 8e3ddff..d235b0d 100644
--- a/digest.js
+++ b/digest.js
@@ -1,6 +1,6 @@
 var crypto = require('crypto');
 var util = require('util');
-var stringifyUri = require('./sip').stringifyUri; 
+var stringifyUri = require('./sip').stringifyUri;
 
 function unq(a) {
   if(a && a[0] === '"' && a[a.length-1] === '"')
@@ -43,16 +43,16 @@ function calculateHA1(ctx) {
   var userhash = ctx.userhash || calculateUserRealmPasswordHash(ctx.user, ctx.realm, ctx.password);
   if(ctx.algorithm === 'md5-sess') return kd(userhash, ctx.nonce, ctx.cnonce);
 
-  return userhash; 
+  return userhash;
 }
 exports.calculateHA1 = calculateHA1;
 
 function calculateDigest(ctx) {
   switch(ctx.qop) {
-  case 'auth-int':
-    return kd(ctx.ha1, ctx.nonce, ctx.nc, ctx.cnonce, ctx.qop, kd(ctx.method, ctx.uri, kd(ctx.entity)));
-  case 'auth':
-    return kd(ctx.ha1, ctx.nonce, ctx.nc, ctx.cnonce, ctx.qop, kd(ctx.method, ctx.uri));
+    case 'auth-int':
+      return kd(ctx.ha1, ctx.nonce, ctx.nc, ctx.cnonce, ctx.qop, kd(ctx.method, ctx.uri, kd(ctx.entity)));
+    case 'auth':
+      return kd(ctx.ha1, ctx.nonce, ctx.nc, ctx.cnonce, ctx.qop, kd(ctx.method, ctx.uri));
   }
 
   return kd(ctx.ha1, ctx.nonce, kd(ctx.method, ctx.uri));
@@ -95,7 +95,7 @@ function selectQop(challenge, preference) {
   if(!preference)
     return challenge[0];
 
-  if(typeof(preference) === 'string') 
+  if(typeof(preference) === 'string')
     preference = preference.split(',');
 
   for(var i = 0; i !== preference.length; ++i)
@@ -140,14 +140,14 @@ exports.authenticateRequest = function(ctx, rq, creds) {
   var qop = unq(lowercase(response.qop));
 
   ctx.nc = (ctx.nc || 0) +1;
-  
+
   if(!ctx.ha1) {
     ctx.userhash = creds.hash || calculateUserRealmPasswordHash(creds.user, ctx.realm, creds.password);
     ctx.ha1 = ctx.userhash;
     if(ctx.algoritm === 'md5-sess')
       ctx.ha1 = kd(ctx.userhash, ctx.nonce, cnonce);
   }
-  
+
   var digest = calculateDigest({ha1:ctx.ha1, method:rq.method, nonce:ctx.nonce, nc:numberTo8Hex(ctx.nc), cnonce:cnonce, qop:qop, uri:uri, entity:rq.content});
   if(digest === unq(response.response)) {
     ctx.cnonce = cnonce;
@@ -155,7 +155,7 @@ exports.authenticateRequest = function(ctx, rq, creds) {
     ctx.qop = qop;
 
     return true;
-  } 
+  }
 
   return false;
 }
@@ -180,13 +180,13 @@ function initClientContext(ctx, rs, creds) {
   }
   else
     challenge = findDigestRealm(rs.headers['www-authenticate'], creds.realm);
-  
+
   if(ctx.nonce !== unq(challenge.nonce)) {
     ctx.nonce = unq(challenge.nonce);
 
     ctx.algorithm = unq(lowercase(challenge.algorithm));
     ctx.qop = selectQop(lowercase(challenge.qop), ctx.qop);
- 
+
     if(ctx.qop) {
       ctx.nc = 0;
       ctx.cnonce = rbytes();
@@ -201,7 +201,7 @@ function initClientContext(ctx, rs, creds) {
       ctx.ha1 = kd(ctx.ha1, ctx.nonce, ctx.cnonce);
 
     ctx.domain = unq(challenge.domain);
- }
+  }
 
   ctx.opaque = unq(challenge.opaque);
 }
@@ -214,23 +214,23 @@ exports.signRequest = function (ctx, rq, rs, creds) {
   var nc = ctx.nc !== undefined ? numberTo8Hex(++ctx.nc) : undefined;
 
   ctx.uri = stringifyUri(rq.uri);
-  
+
   var signature = {
     scheme: 'Digest',
     realm: q(ctx.realm),
     username: q(ctx.user),
-    nonce: q(ctx.nonce), 
+    nonce: q(ctx.nonce),
     uri: q(ctx.uri),
     nc: nc,
     algorithm: ctx.algorithm,
     cnonce: q(ctx.cnonce),
     qop: ctx.qop,
     opaque: q(ctx.opaque),
-    response: q(calculateDigest({ha1:ctx.ha1, method:rq.method, nonce:ctx.nonce, nc:nc, cnonce:ctx.cnonce, qop:ctx.qop, uri:ctx.uri, entity:rq.content}))    
+    response: q(calculateDigest({ha1:ctx.ha1, method:rq.method, nonce:ctx.nonce, nc:nc, cnonce:ctx.cnonce, qop:ctx.qop, uri:ctx.uri, entity:rq.content}))
   };
 
-  var hname = ctx.proxy ? 'proxy-authorization' : 'authorization'; 
- 
+  var hname = ctx.proxy ? 'proxy-authorization' : 'authorization';
+
   rq.headers[hname] = (rq.headers[hname] || []).filter(function(x) { return unq(x.realm) !== ctx.realm; });
   rq.headers[hname].push(signature);
 
@@ -249,13 +249,13 @@ exports.authenticateResponse = function(ctx, rs) {
       ctx.nonce = nextnonce;
       ctx.nc = 0;
 
-      if(ctx.algorithm === 'md5-sess') 
+      if(ctx.algorithm === 'md5-sess')
         ctx.ha1 = kd(ctx.userhash, ctx.nonce, ctx.cnonce);
     }
 
     return true;
   }
- 
+
   return false;
 }
 
diff --git a/proxy.js b/proxy.js
index aae068e..3fa692d 100644
--- a/proxy.js
+++ b/proxy.js
@@ -21,7 +21,7 @@ exports.send = function(msg, callback) {
     sip.send.apply(sip, arguments);
     return;
   }
- 
+
   return msg.method ? forwardRequest(ctx, msg, callback || defaultCallback) : forwardResponse(ctx, msg);
 };
 
@@ -90,7 +90,7 @@ exports.start = function(options, route) {
 
       if(ctx) {
         sip.send(sip.makeResponse(rq, 200));
-       
+
         ctx.cancelled = true;
         if(ctx.cancellers) {
           Object.keys(ctx.cancellers).forEach(function(c) { ctx.cancellers[c](); });
diff --git a/sdp.js b/sdp.js
index 90c17f3..a83c046 100644
--- a/sdp.js
+++ b/sdp.js
@@ -34,42 +34,42 @@ var parsers = {
 
 exports.parse = function(sdp) {
   var sdp = sdp.split(/\r\n/);
-  
+
   var root = {};
   var m;
   root.m = [];
 
   for(var i = 0; i < sdp.length; ++i) {
     var tmp = /^(\w)=(.*)/.exec(sdp[i]);
-    
+
     if(tmp) {
 
-    var c = (parsers[tmp[1]] || function(x) { return x;})(tmp[2]);
-    switch(tmp[1]) {
-    case 'm':
-      if(m) root.m.push(m);
-      m = c;
-      break;
-    case 'a':
-      var o = (m || root);
-      if(o.a === undefined) o.a = [];
-      o.a.push(c);
-      break;
-    default:
-      (m || root)[tmp[1]] = c;
-      break;
-    }
+      var c = (parsers[tmp[1]] || function(x) { return x;})(tmp[2]);
+      switch(tmp[1]) {
+        case 'm':
+          if(m) root.m.push(m);
+          m = c;
+          break;
+        case 'a':
+          var o = (m || root);
+          if(o.a === undefined) o.a = [];
+          o.a.push(c);
+          break;
+        default:
+          (m || root)[tmp[1]] = c;
+          break;
+      }
     }
   }
 
   if(m) root.m.push(m);
-  
+
   return root;
 };
 
 var stringifiers = {
   o: function(o) {
-    return [o.username || '-', o.id, o.version, o.nettype || 'IN', o.addrtype || 'IP4', o.address].join(' '); 
+    return [o.username || '-', o.id, o.version, o.nettype || 'IN', o.addrtype || 'IP4', o.address].join(' ');
   },
   c: function(c) {
     return [c.nettype || 'IN', c.addrtype || 'IP4', c.address].join(' ');
@@ -96,7 +96,7 @@ function stringifyParam(sdp, type, def) {
 
 exports.stringify = function(sdp) {
   var s = '';
-  
+
   s += stringifyParam(sdp, 'v', 0);
   s +=  stringifyParam(sdp, 'o');
   s +=  stringifyParam(sdp, 's', '-');
diff --git a/sip.js b/sip.js
index 0e3bab0..173e0e3 100644
--- a/sip.js
+++ b/sip.js
@@ -16,15 +16,15 @@ function debug(e) {
     util.debug(util.inspect(e));
 }
 
-function toBase64(s) { 
+function toBase64(s) {
   switch(s.length % 3) {
-  case 1:
-    s += '  ';
-    break;
-  case 2:
-    s += ' ';
-    break;
-  default:
+    case 1:
+      s += '  ';
+      break;
+    case 2:
+      s += ' ';
+      break;
+    default:
   }
 
   return (new Buffer(s)).toString('base64').replace(/\//g, '_').replace(/\+/g, '-');
@@ -40,7 +40,7 @@ function parseResponse(rs, m) {
     m.reason = r[3];
 
     return m;
-  }  
+  }
 }
 
 function parseRequest(rq, m) {
@@ -68,8 +68,8 @@ function applyRegex(regex, data) {
 function parseParams(data, hdr) {
   hdr.params = hdr.params || {};
 
-  var re = /\s*;\s*([\w\-.!%*_+`'~]+)(?:\s*=\s*([\w\-.!%*_+`'~]+|"[^"\\]*(\\.[^"\\]*)*"))?/g; 
-  
+  var re = /\s*;\s*([\w\-.!%*_+`'~]+)(?:\s*=\s*([\w\-.!%*_+`'~]+|"[^"\\]*(\\.[^"\\]*)*"))?/g;
+
   for(var r = applyRegex(re, data); r; r = applyRegex(re, data)) {
     hdr.params[r[1].toLowerCase()] = r[2] || null;
   }
@@ -238,7 +238,7 @@ function stringifyVersion(v) {
 function stringifyParams(params) {
   var s = '';
   for(var n in params) {
-      s += ';'+n+(params[n]?'='+params[n]:'');
+    s += ';'+n+(params[n]?'='+params[n]:'');
   }
 
   return s;
@@ -268,7 +268,7 @@ function stringifyUri(uri) {
   if(uri.headers) {
     var h = Object.keys(uri.headers).map(function(x){return x+'='+uri.headers[x];}).join('&');
     if(h.length)
-      s += '?' + h; 
+      s += '?' + h;
   }
   return s;
 }
@@ -276,7 +276,7 @@ function stringifyUri(uri) {
 exports.stringifyUri = stringifyUri;
 
 function stringifyAOR(aor) {
-  return (aor.name || '') + ' <' + stringifyUri(aor.uri) + '>'+stringifyParams(aor.params); 
+  return (aor.name || '') + ' <' + stringifyUri(aor.uri) + '>'+stringifyParams(aor.params);
 }
 
 function stringifyAuthHeader(a) {
@@ -306,11 +306,11 @@ var stringifiers = {
   },
   to: function(h) {
     return 'To: '+stringifyAOR(h) + '\r\n';
-   },
+  },
   from: function(h) {
     return 'From: '+stringifyAOR(h)+'\r\n';
   },
-  contact: function(h) { 
+  contact: function(h) {
     return 'Contact: '+ ((h !== '*' && h.length) ? h.map(stringifyAOR).join(', ') : '*') + '\r\n';
   },
   route: function(h) {
@@ -319,23 +319,23 @@ var stringifiers = {
   'record-route': function(h) {
     return h.length ? 'Record-Route: ' + h.map(stringifyAOR).join(', ') + '\r\n' : '';
   },
-  'path': function(h) { 
+  'path': function(h) {
     return h.length ? 'Path: ' + h.map(stringifyAOR).join(', ') + '\r\n' : '';
   },
-  cseq: function(cseq) { 
+  cseq: function(cseq) {
     return 'CSeq: '+cseq.seq+' '+cseq.method+'\r\n';
   },
-  'www-authenticate': function(h) { 
+  'www-authenticate': function(h) {
     return h.map(function(x) { return 'WWW-Authenticate: '+stringifyAuthHeader(x)+'\r\n'; }).join('');
   },
-  'proxy-authenticate': function(h) { 
+  'proxy-authenticate': function(h) {
     return h.map(function(x) { return 'Proxy-Authenticate: '+stringifyAuthHeader(x)+'\r\n'; }).join('');
   },
   'authorization': function(h) {
     return h.map(function(x) { return 'Authorization: ' + stringifyAuthHeader(x) + '\r\n'}).join('');
   },
   'proxy-authorization': function(h) {
-    return h.map(function(x) { return 'Proxy-Authorization: ' + stringifyAuthHeader(x) + '\r\n'}).join('');; 
+    return h.map(function(x) { return 'Proxy-Authorization: ' + stringifyAuthHeader(x) + '\r\n'}).join('');;
   },
   'authentication-info': function(h) {
     return 'Authentication-Info: ' + stringifyAuthHeader(h) + '\r\n';
@@ -362,13 +362,13 @@ function stringify(m) {
 
   for(var n in m.headers) {
     if(typeof m.headers[n] !== "undefined") {
-      if(typeof m.headers[n] === 'string' || !stringifiers[n]) 
+      if(typeof m.headers[n] === 'string' || !stringifiers[n])
         s += prettifyHeaderName(n) + ': ' + m.headers[n] + '\r\n';
       else
         s += stringifiers[n](m.headers[n], n);
     }
   }
-  
+
   s += '\r\n';
 
   if(m.content)
@@ -425,7 +425,7 @@ exports.copyMessage = function(msg, deep) {
     content: msg.content
   };
 
-  // always copy via array 
+  // always copy via array
   r.headers.via = clone(msg.headers.via);
 
   return r;
@@ -443,7 +443,7 @@ function makeStreamParser(onMessage, onFlood, maxBytesHeaders, maxContentLength)
 
   var m;
   var r = '';
-  
+
   function headers(data) {
     r += data;
 
@@ -486,9 +486,9 @@ function makeStreamParser(onMessage, onFlood, maxBytesHeaders, maxContentLength)
 
     if(r.length >= m.headers['content-length']) {
       m.content = r.substring(0, m.headers['content-length']);
-      
+
       onMessage(m);
-      
+
       var s = r.substring(m.headers['content-length']);
       state = headers;
       r = '';
@@ -516,7 +516,7 @@ function parseMessage(s) {
       else {
         m.content = r[2];
       }
-      
+
       return m;
     }
   }
@@ -569,23 +569,23 @@ function makeStreamTransport(protocol, maxBytesHeaders, maxContentLength, connec
 
     stream.setEncoding('binary');
     stream.on('data', makeStreamParser( onMessage, onFlood, maxBytesHeaders, maxContentLength));
-  
+
     stream.on('close',    function() {
-      if(flowid) delete flows[flowid]; 
+      if(flowid) delete flows[flowid];
       delete remotes[remoteid];
     });
     stream.on('connect',  register_flow);
 
     stream.on('error',    function() {});
-    stream.on('end',      function() { 
+    stream.on('end',      function() {
       if(refs !== 0) stream.emit('error', new Error('remote peer disconnected'));
       stream.end();
     });
 
     stream.on('timeout',  function() { if(refs === 0) stream.destroy(); });
-    stream.setTimeout(120000);   
+    stream.setTimeout(120000);
     stream.setMaxListeners(10000);
- 
+
     remotes[remoteid] = function(onError) {
       ++refs;
       if(onError) stream.on('error', onError);
@@ -608,7 +608,7 @@ function makeStreamTransport(protocol, maxBytesHeaders, maxContentLength, connec
   }
 
   var server = createServer(function(stream) {
-    init(stream, {protocol: protocol, address: stream.remoteAddress, port: stream.remotePort});  
+    init(stream, {protocol: protocol, address: stream.remoteAddress, port: stream.remotePort});
   });
 
   return {
@@ -631,10 +631,10 @@ function makeStreamTransport(protocol, maxBytesHeaders, maxContentLength, connec
 
 function makeTlsTransport(options, callback) {
   return makeStreamTransport(
-    'TLS', 
+    'TLS',
     options.maxBytesHeaders,
     options.maxContentLength,
-    function(port, host, callback) { return tls.connect(port, host, options.tls, callback); }, 
+    function(port, host, callback) { return tls.connect(port, host, options.tls, callback); },
     function(callback) {
       var server = tls.createServer(options.tls, callback);
       server.listen(options.tls_port || 5061, options.address);
@@ -649,7 +649,7 @@ function makeTcpTransport(options, callback) {
     options.maxBytesHeaders,
     options.maxContentLength,
     function(port, host, callback) { return net.connect(port, host, callback); },
-    function(callback) { 
+    function(callback) {
       var server = net.createServer(callback);
       server.listen(options.port || 5060, options.address);
       return server;
@@ -661,11 +661,11 @@ function makeWsTransport(options, callback) {
   var flows = Object.create(null);
   var clients = Object.create(null);
 
-  
+
   function init(ws) {
     var remote = {address: ws._socket.remoteAddress, port: ws._socket.remotePort},
-        local = {address: ws._socket.address().address, port: ws._socket.address().port},
-        flowid = [remote.address, remote.port, local.address, local.port].join();
+      local = {address: ws._socket.address().address, port: ws._socket.address().port},
+      flowid = [remote.address, remote.port, local.address, local.port].join();
 
     flows[flowid] = ws;
 
@@ -682,15 +682,15 @@ function makeWsTransport(options, callback) {
     if(clients[uri]) return clients[uri]();
 
     var socket = new WebSocket(uri, 'sip', {procotol: 'sip'}),
-        queue = [],
-        refs = 0;
-    
+      queue = [],
+      refs = 0;
+
     function send_connecting(m) { queue.push(stringify(m)); }
     function send_open(m) { socket.send(new Buffer(typeof m === 'string' ? m : stringify(m), 'binary')); }
     var send = send_connecting;
 
-    socket.on('open', function() { 
-      init(socket); 
+    socket.on('open', function() {
+      init(socket);
       send = send_open;
       queue.splice(0).forEach(send);
     });
@@ -715,12 +715,12 @@ function makeWsTransport(options, callback) {
     if(options.tls) {
       var http = require('https');
       var server = new WebSocket.Server({
-          server: http.createServer(options.tls, function(rq,rs) { 
-            rs.writeHead(200);
-            rs.end("");
-          }).listen(options.ws_port)
+        server: http.createServer(options.tls, function(rq,rs) {
+          rs.writeHead(200);
+          rs.end("");
+        }).listen(options.ws_port)
       });
-    } 
+    }
     else {
       var server = new WebSocket.Server({port:options.ws_port});
     }
@@ -737,16 +737,16 @@ function makeWsTransport(options, callback) {
         protocol: 'WS'
       };
     } else {
-        console.log("Failed to get ws for target. Target/flow was:");
-        console.log(util.inspect(flow));
-        console.log("Flows[] were:");
-        console.log(util.inspect(flows));
+      console.log("Failed to get ws for target. Target/flow was:");
+      console.log(util.inspect(flow));
+      console.log("Flows[] were:");
+      console.log(util.inspect(flows));
     }
   }
 
   function open(target, onError) {
     if(target.local)
-      return get(target); 
+      return get(target);
     else
       return makeClient('ws://'+target.host+':'+target.port)(onError);
   }
@@ -761,7 +761,7 @@ function makeWsTransport(options, callback) {
 function makeUdpTransport(options, callback) {
   function onMessage(data, rinfo) {
     var msg = parseMessage(data);
-   
+
     if(msg && checkMessage(msg)) {
       if(msg.method) {
         msg.headers.via[0].params.received = rinfo.address;
@@ -776,20 +776,20 @@ function makeUdpTransport(options, callback) {
   var address = options.address || '0.0.0.0';
   var port = options.port || 5060;
 
-  var socket = dgram.createSocket(net.isIPv6(address) ? 'udp6' : 'udp4', onMessage); 
+  var socket = dgram.createSocket(net.isIPv6(address) ? 'udp6' : 'udp4', onMessage);
   socket.bind(port, address);
 
   function open(remote, error) {
     return {
       send: function(m) {
         var s = stringify(m);
-        socket.send(new Buffer(s, 'binary'), 0, s.length, remote.port, remote.address);          
+        socket.send(new Buffer(s, 'binary'), 0, s.length, remote.port, remote.address);
       },
       protocol: 'UDP',
       release : function() {}
-    }; 
+    };
   };
-  
+
   return {
     open: open,
     get: open,
@@ -807,9 +807,9 @@ function makeTransport(options, callback) {
       callback(m, remote, stream);
     }
   }
-  
+
   if(options.udp === undefined || options.udp)
-    protocols.UDP = makeUdpTransport(options, callbackAndLog); 
+    protocols.UDP = makeUdpTransport(options, callbackAndLog);
   if(options.tcp === undefined || options.tcp)
     protocols.TCP = makeTcpTransport(options, callbackAndLog);
   if(options.tls)
@@ -819,18 +819,18 @@ function makeTransport(options, callback) {
 
   function wrap(obj, target) {
     return Object.create(obj, {send: {value: function(m) {
-      if(m.method) {
-        m.headers.via[0].host = options.publicAddress || options.address || options.hostname || os.hostname();
-        m.headers.via[0].port = options.port || defaultPort(this.protocol);
-        m.headers.via[0].protocol = this.protocol;
+          if(m.method) {
+            m.headers.via[0].host = options.publicAddress || options.address || options.hostname || os.hostname();
+            m.headers.via[0].port = options.port || defaultPort(this.protocol);
+            m.headers.via[0].protocol = this.protocol;
 
-        if(this.protocol === 'UDP' && (!options.hasOwnProperty('rport') || options.rport)) {
-          m.headers.via[0].params.rport = null;
-        }
-      }
-      options.logger && options.logger.send && options.logger.send(m, target);
-      obj.send(m);
-    }}});
+            if(this.protocol === 'UDP' && (!options.hasOwnProperty('rport') || options.rport)) {
+              m.headers.via[0].params.rport = null;
+            }
+          }
+          options.logger && options.logger.send && options.logger.send(m, target);
+          obj.send(m);
+        }}});
   }
 
   return {
@@ -850,7 +850,7 @@ function makeTransport(options, callback) {
         cn.release();
       }
     },
-    destroy: function() { 
+    destroy: function() {
       var protos = protocols;
       protocols = [];
       Object.keys(protos).forEach(function(key) { protos[key].destroy(); });
@@ -862,14 +862,14 @@ exports.makeTransport = makeTransport;
 
 function makeWellBehavingResolver(resolve) {
   var outstanding = Object.create(null);
-  
+
   return function(name, cb) {
     if(outstanding[name]) {
       outstanding[name].push(cb);
     }
     else {
       outstanding[name] = [cb];
-      
+
       resolve(name, function() {
         var o = outstanding[name];
         delete outstanding[name];
@@ -892,7 +892,7 @@ function resolve(uri, action) {
     var protocol = uri.params.transport || 'UDP';
     return action([{protocol: protocol, address: uri.host, port: uri.port || defaultPort(protocol)}]);
   }
-  
+
   function resolve46(host, cb) {
     resolve4(host, function(e4, a4) {
       resolve6(host, function(e6, a6) {
@@ -906,29 +906,29 @@ function resolve(uri, action) {
 
   if(uri.port) {
     var protocols = uri.params.transport ? [uri.params.transport] : ['UDP', 'TCP', 'TLS'];
-    
+
     resolve46(uri.host, function(err, address) {
       address = (address || []).map(function(x) { return protocols.map(function(p) { return { protocol: p, address: x, port: uri.port || defaultPort(p)};});})
         .reduce(function(arr,v) { return arr.concat(v); }, []);
-        action(address);
+      action(address);
     });
   }
   else {
     var protocols = uri.params.transport ? [uri.params.transport] : ['tcp', 'udp', 'tls'];
-  
+
     var n = protocols.length;
     var addresses = [];
 
     protocols.forEach(function(proto) {
       resolveSrv('_sip._'+proto+'.'+uri.host, function(e, r) {
         --n;
-        
+
         if(Array.isArray(r)) {
           n += r.length;
           r.forEach(function(srv) {
             resolve46(srv.name, function(e, r) {
               addresses = addresses.concat((r||[]).map(function(a) { return {protocol: proto, address: a, port: srv.port};}));
-            
+
               if((--n)===0) // all outstanding requests has completed
                 action(addresses);
             });
@@ -968,14 +968,14 @@ function makeSM() {
     enter: function(newstate) {
       if(state && state.leave)
         state.leave();
-      
+
       state = newstate;
       Array.prototype.shift.apply(arguments);
-      if(state.enter) 
+      if(state.enter)
         state.enter.apply(this, arguments);
     },
     signal: function(s) {
-      if(state && state[s]) 
+      if(state && state[s])
         state[Array.prototype.shift.apply(arguments)].apply(state, arguments);
     }
   };
@@ -984,9 +984,9 @@ function makeSM() {
 function createInviteServerTransaction(transport, cleanup) {
   var sm = makeSM();
   var rs;
-    
+
   var proceeding = {
-    message: function() { 
+    message: function() {
       if(rs) transport(rs);
     },
     send: function(message) {
@@ -996,7 +996,7 @@ function createInviteServerTransaction(transport, cleanup) {
         sm.enter(completed);
       else if(message.status >= 200)
         sm.enter(accepted);
-      
+
       transport(rs);
     }
   }
@@ -1004,7 +1004,7 @@ function createInviteServerTransaction(transport, cleanup) {
   var g, h;
   var completed = {
     enter: function () {
-      g = setTimeout(function retry(t) { 
+      g = setTimeout(function retry(t) {
         g = setTimeout(retry, t*2, t*2);
         transport(rs)
       }, 500, 500);
@@ -1021,8 +1021,8 @@ function createInviteServerTransaction(transport, cleanup) {
         transport(rs);
     }
   }
- 
-  var timer_i; 
+
+  var timer_i;
   var confirmed = {
     enter: function() { timer_i = setTimeout(sm.enter.bind(sm, terminated), 5000);},
     leave: function() { clearTimeout(timer_i); }
@@ -1032,14 +1032,14 @@ function createInviteServerTransaction(transport, cleanup) {
   var accepted = {
     enter: function() { l = setTimeout(sm.enter.bind(sm, terminated), 32000);},
     leave: function() { clearTimeout(l); },
-    send: function(m) { 
+    send: function(m) {
       rs = m;
       transport(rs);
-    }  
+    }
   };
 
   var terminated = {enter: cleanup};
-  
+
   sm.enter(proceeding);
 
   return {send: sm.signal.bind(sm, 'send'), message: sm.signal.bind(sm,'message'), shutdown: function() { sm.enter(terminated); }};
@@ -1056,7 +1056,7 @@ function createServerTransaction(transport, cleanup) {
       transport(m);
       if(m.status >= 200) sm.enter(completed);
     }
-  }; 
+  };
 
   var j;
   var completed = {
@@ -1086,7 +1086,7 @@ function createInviteClientTransaction(rq, transport, tu, cleanup, options) {
           a = setTimeout(resend, t*2, t*2);
         }, 500, 500);
       }
-        
+
       b = setTimeout(function() {
         tu(makeResponse(rq, 408));
         sm.enter(terminated);
@@ -1101,8 +1101,8 @@ function createInviteClientTransaction(rq, transport, tu, cleanup, options) {
 
       if(message.status < 200)
         sm.enter(proceeding);
-      else if(message.status < 300) 
-         sm.enter(accepted);
+      else if(message.status < 300)
+        sm.enter(accepted);
       else
         sm.enter(completed, message);
     }
@@ -1111,7 +1111,7 @@ function createInviteClientTransaction(rq, transport, tu, cleanup, options) {
   var proceeding = {
     message: function(message) {
       tu(message);
-      
+
       if(message.status >= 300)
         sm.enter(completed, message);
       else if(message.status >= 200)
@@ -1127,7 +1127,7 @@ function createInviteClientTransaction(rq, transport, tu, cleanup, options) {
       cseq: {method: 'ACK', seq: rq.headers.cseq.seq},
       'call-id': rq.headers['call-id'],
       via: [rq.headers.via[0]],
-      'max-forwards': (options && options['max-forwards']) || 70 
+      'max-forwards': (options && options['max-forwards']) || 70
     }
   };
 
@@ -1157,20 +1157,20 @@ function createInviteClientTransaction(rq, transport, tu, cleanup, options) {
   };
 
   var terminated = {enter: cleanup};
- 
+
   process.nextTick(function(){ sm.enter(calling); });
- 
+
   return {message: sm.signal.bind(sm, 'message'), shutdown: function() { sm.enter(terminated); }};
 }
 
-function createClientTransaction(rq, transport, tu, cleanup) {  
+function createClientTransaction(rq, transport, tu, cleanup) {
   assert.ok(rq.method !== 'INVITE');
 
   var sm = makeSM();
-  
+
   var e, f;
   var trying = {
-    enter: function() { 
+    enter: function() {
       transport(rq);
       if(!transport.reliable)
         e = setTimeout(function() { sm.signal('timerE', 500); }, 500);
@@ -1231,31 +1231,31 @@ function makeTransactionLayer(options, transport) {
   return {
     createServerTransaction: function(rq, cn) {
       var id = makeTransactionId(rq);
-      
+
       return server_transactions[id] = (rq.method === 'INVITE' ? createInviteServerTransaction : createServerTransaction)(
         cn.send.bind(cn),
-        function() { 
+        function() {
           delete server_transactions[id];
           cn.release();
         });
     },
     createClientTransaction: function(connection, rq, callback) {
       if(rq.method !== 'CANCEL') rq.headers.via[0].params.branch = generateBranch();
-      
-      
+
+
       if(typeof rq.headers.cseq !== 'object')
         rq.headers.cseq = parseCSeq({s: rq.headers.cseq, i:0});
 
       var send = connection.send.bind(connection);
       send.reliable = connection.protocol.toUpperCase() !== 'UDP';
-      
+
       var id = makeTransactionId(rq);
-      return client_transactions[id] = 
-        (rq.method === 'INVITE' ? createInviteClientTransaction : createClientTransaction)(rq, send, callback, function() { 
-          delete client_transactions[id];
-          connection.release();
-        }, 
-        options);
+      return client_transactions[id] =
+        (rq.method === 'INVITE' ? createInviteClientTransaction : createClientTransaction)(rq, send, callback, function() {
+            delete client_transactions[id];
+            connection.release();
+          },
+          options);
     },
     getServer: function(m) {
       return server_transactions[makeTransactionId(m)];
@@ -1282,7 +1282,7 @@ function sequentialSearch(transaction, connect, addresses, rq, callback) {
   var lastStatusCode;
   function next() {
     onresponse = searching;
-    
+
     if(addresses.length > 0) {
       try {
         var address = addresses.shift();
@@ -1291,10 +1291,10 @@ function sequentialSearch(transaction, connect, addresses, rq, callback) {
             console.log("err: ", err);
           }
           client.message(makeResponse(rq, 503));
-        }), rq, function() { onresponse.apply(null, arguments); }); 
+        }), rq, function() { onresponse.apply(null, arguments); });
       }
       catch(e) {
-        onresponse(address.local ? makeResponse(rq, 430) : makeResponse(rq, 503));  
+        onresponse(address.local ? makeResponse(rq, 430) : makeResponse(rq, 503));
       }
     }
     else {
@@ -1309,10 +1309,10 @@ function sequentialSearch(transaction, connect, addresses, rq, callback) {
       return next();
     else if(rs.status > 100)
       onresponse = callback;
-    
+
     callback(rs);
   }
- 
+
   next();
 }
 
@@ -1331,7 +1331,7 @@ exports.create = function(options, callback) {
           } catch(e) {
             t.send(makeResponse(m, '500', 'Internal Server Error'));
             throw e;
-          } 
+          }
         }
         else if(m.method === 'ACK') {
           callback(m,remote);
@@ -1340,12 +1340,12 @@ exports.create = function(options, callback) {
       else {
         t.message && t.message(m, remote);
       }
-    } 
+    }
     catch(e) {
       errorLog(e);
     }
   });
-  
+
   var transaction = makeTransactionLayer(options, transport.open.bind(transport));
   var hostname = options.publicAddress || options.address || options.hostname || os.hostname();
   var rbytes = crypto.randomBytes(20);
@@ -1364,8 +1364,8 @@ exports.create = function(options, callback) {
     var flow = {protocol: s[1], address: s[2], port: +s[3], local: {address: s[4], port: +s[5]}};
 
     return encodeFlowToken(flow) == token ? flow : undefined;
-  }       
-  
+  }
+
   return {
     send: function(m, callback) {
       if(m.method === undefined) {
@@ -1377,12 +1377,12 @@ exports.create = function(options, callback) {
 
         if(typeof m.headers.route === 'string')
           m.headers.route = parsers.route({s: m.headers.route, i:0});
- 
+
         if(m.headers.route && m.headers.route.length > 0) {
           hop = parseUri(m.headers.route[0].uri);
           if(hop.host === hostname) {
             m.headers.route.shift();
-          } 
+          }
           else if(hop.params.lr === undefined ) {
             m.headers.route.shift();
             m.headers.route.push({uri: m.uri});
@@ -1404,7 +1404,7 @@ exports.create = function(options, callback) {
 
             if(m.headers.via.length === 0)
               m.headers.via.unshift({params: {branch: generateBranch()}});
-            
+
             if(addresses.length === 0) {
               errorLog(new Error("ACK: couldn't resolve " + stringifyUri(m.uri)));
               return;
@@ -1413,7 +1413,7 @@ exports.create = function(options, callback) {
             var cn = transport.open(addresses[0], errorLog);
             try {
               cn.send(m);
-            } 
+            }
             catch(e) {
               errorLog(e);
             }
@@ -1422,7 +1422,7 @@ exports.create = function(options, callback) {
             }
           }
           else
-            sequentialSearch(transaction.createClientTransaction.bind(transaction), transport.open.bind(transport), addresses, m, callback || function() {}); 
+            sequentialSearch(transaction.createClientTransaction.bind(transaction), transport.open.bind(transport), addresses, m, callback || function() {});
         });
       }
     },
@@ -1441,7 +1441,7 @@ exports.create = function(options, callback) {
       transaction.destroy();
       transport.destroy();
     }
-  } 
+  }
 }
 
 exports.start = function(options, callback) {