Add mbuf enqueue/dequeue functions

include/ucore/mbuf.h

@@ -181,7 +181,7 @@ uint8_t *uc_mbuf_put(struct MBuf *mbuf, uint32_t size);
  * data in the buffer, retreating the head pointer by size butes
  * You need to insert the size bytes in the returned pointer.
  *
- * @oaram size bytes to prepend to the buffer
+w* @oaram size bytes to prepend to the buffer
  * @return NULL if the mbuf does not have enough headroom
  */
 uint8_t *uc_mbuf_push(struct MBuf *mbuf, uint32_t size);
@@ -214,4 +214,16 @@ static UC_INLINE uint8_t *uc_mbuf_head(struct MBuf* mbuf)
     return mbuf->head;
 }
 
+/** Add the mbuf at the end of the tailq.
+ * This uses the tailQ entry member of the mbuf.
+ */
+void uc_mbuf_enqueue(struct MBuf *mbuf, struct TailQ *head);
+
+/** Remove and return the mbuf at the start of the tailq.
+ * @return the first mbuf in the queue, or NULL if ti isempty.
+ */
+struct MBuf *uc_mbuf_dequeue(struct TailQ *head);
+
+
+
 #endif