Modified version of unix-dgram's Socket.send function, with winston-syslog's usage of this function for reference

gistfile1.js

//unix-dgram/src/unix_dgram.js

Socket.prototype.send = function(buf, offset, length, path, callback) {
  // FIXME defer error and callback to next tick?
  var err;
  if (send(this.fd, buf, offset, length, path) == -1) {
    err = 'Error with send'; // Replaces  this.emit('error', errnoException(errno, 'send'));
  }
  callback(err); // Always call callback, sometimes with err
};

//winston-syslog/lib/winston-syslog.js, inside Syslog.prototype.log - UNCHANGED

this.connect(function (err) {
    if (err) {
      //
      // If there was an error enqueue the message
      //
      return self.queue.push(syslogMsg);
    }
    
    //
    // On any error writing to the socket, enqueue the message
    // 
    function onError (logErr) {
      if (logErr) { self.queue.push(syslogMsg) }
      self.emit('logged');
      self.inFlight--;
    }
    
    //
    // Write to the `tcp*`, `udp*`, or `unix` socket.
    // 
    if (self.isDgram) {
      buffer = new Buffer(syslogMsg);
      if (self.protocol.match(/^udp/)) {
        self.inFlight++;
        self.socket.send(buffer, 0, buffer.length, self.port, self.host, onError);
      }
      else {
        self.socket.send(buffer, 0, buffer.length, self.path, onError);
      }
    }
    else {
      self.socket.write(syslogMsg, 'utf8', onError);
    }
  });