func: static void qemu_net_queue_append(NetQueue *queue,
  
                                    NetClientState *sender,
  
                                    unsigned flags,
  
                                    const uint8_t *buf,
  
                                    size_t size,
  
                                    NetPacketSent *sent_cb)
  
  {
  
      NetPacket *packet;
  
  
  
      if (queue->nq_count >= queue->nq_maxlen && !sent_cb) {
  
          return; /* drop if queue full and no callback */
  
      }
  
      packet = g_malloc(sizeof(NetPacket) + size);
  
      packet->sender = sender;
  
      packet->flags = flags;
  
      packet->size = size;
  
      packet->sent_cb = sent_cb;
  
      memcpy(packet->data, buf, size);
  
  
  
  
      QTAILQ_INSERT_TAIL(&queue->packets, packet, entry);
  
  }