/*
   * Copyright (c) 1993, 1994, 1995, 1996, 1997
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that: (1) source code distributions
   * retain the above copyright notice and this paragraph in its entirety, (2)
   * distributions including binary code include the above copyright notice and
   * this paragraph in its entirety in the documentation or other materials
   * provided with the distribution, and (3) all advertising materials mentioning
   * features or use of this software display the following acknowledgement:
   * ``This product includes software developed by the University of California,
   * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
   * the University nor the names of its contributors may be used to endorse
   * or promote products derived from this software without specific prior
   * written permission.
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   *
   * pcap-common.h - common code for pcap and pcapng files
   */
  
  /*
   * We use the "receiver-makes-right" approach to byte order,
   * because time is at a premium when we are writing the file.
   * In other words, the pcap_file_header and pcap_pkthdr,
   * records are written in host byte order.
   * Note that the bytes of packet data are written out in the order in
   * which they were received, so multi-byte fields in packets are not
   * written in host byte order, they're written in whatever order the
   * sending machine put them in.
   *
   * ntoh[ls] aren't sufficient because we might need to swap on a big-endian
   * machine (if the file was written in little-end order).
   */
  #define	SWAPLONG(y) \
      (((((u_int)(y))&0xff)<<24) | \
       ((((u_int)(y))&0xff00)<<8) | \
       ((((u_int)(y))&0xff0000)>>8) | \
       ((((u_int)(y))>>24)&0xff))
  #define	SWAPSHORT(y) \
       ((u_short)(((((u_int)(y))&0xff)<<8) | \
                  ((((u_int)(y))&0xff00)>>8)))
  
  extern int dlt_to_linktype(int dlt);
  
  extern int linktype_to_dlt(int linktype);
  
  extern void swap_pseudo_headers(int linktype, struct pcap_pkthdr *hdr,
      u_char *data);
  
  extern u_int max_snaplen_for_dlt(int dlt);