Home | History | Annotate | Download | only in tcpdump
      1 /*	$NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that: (1) source code distributions
      9  * retain the above copyright notice and this paragraph in its entirety, (2)
     10  * distributions including binary code include the above copyright notice and
     11  * this paragraph in its entirety in the documentation or other materials
     12  * provided with the distribution, and (3) all advertising materials mentioning
     13  * features or use of this software display the following acknowledgement:
     14  * ``This product includes software developed by the University of California,
     15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
     16  * the University nor the names of its contributors may be used to endorse
     17  * or promote products derived from this software without specific prior
     18  * written permission.
     19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
     20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
     21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     22  */
     23 
     24 #ifndef lint
     25 static const char rcsid[] _U_ =
     26     "@(#) $Header: /tcpdump/master/tcpdump/print-ah.c,v 1.22 2003-11-19 00:36:06 guy Exp $ (LBL)";
     27 #endif
     28 
     29 #ifdef HAVE_CONFIG_H
     30 #include "config.h"
     31 #endif
     32 
     33 #include <tcpdump-stdinc.h>
     34 
     35 #include <stdio.h>
     36 
     37 #include "ah.h"
     38 
     39 #include "interface.h"
     40 #include "addrtoname.h"
     41 #include "extract.h"
     42 
     43 int
     44 ah_print(register const u_char *bp)
     45 {
     46 	register const struct ah *ah;
     47 	register const u_char *ep;
     48 	int sumlen;
     49 	u_int32_t spi;
     50 
     51 	ah = (const struct ah *)bp;
     52 	ep = snapend;		/* 'ep' points to the end of available data. */
     53 
     54 	TCHECK(*ah);
     55 
     56 	sumlen = ah->ah_len << 2;
     57 	spi = EXTRACT_32BITS(&ah->ah_spi);
     58 
     59 	printf("AH(spi=0x%08x", spi);
     60 	if (vflag)
     61 		printf(",sumlen=%d", sumlen);
     62 	printf(",seq=0x%x", EXTRACT_32BITS(ah + 1));
     63 	if (bp + sizeof(struct ah) + sumlen > ep)
     64 		fputs("[truncated]", stdout);
     65 	fputs("): ", stdout);
     66 
     67 	return sizeof(struct ah) + sumlen;
     68  trunc:
     69 	fputs("[|AH]", stdout);
     70 	return -1;
     71 }
     72