text: #ifndef _TCP_MBUF_H_
  #define _TCP_MBUF_H_
  
  
  struct mbuf;
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  void m_adj_fix(struct mbuf *, int, int);
  void m_trim(struct mbuf *, int);
  void m_freem(struct mbuf *);
  uint32_t m_pktlen(struct mbuf *);
  
  #ifdef __cplusplus
  } /* extern "C" */
  #endif
  
  
  #endif  /* !_TCP_MBUF_H_ */
  