xref: /minix3/external/bsd/tcpdump/dist/print-ah.c (revision b636d99d91c3d54204248f643c14627405d4afd1)
1*b636d99dSDavid van Moolenbroek /*	NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp 	*/
2*b636d99dSDavid van Moolenbroek 
3*b636d99dSDavid van Moolenbroek /*
4*b636d99dSDavid van Moolenbroek  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
5*b636d99dSDavid van Moolenbroek  *	The Regents of the University of California.  All rights reserved.
6*b636d99dSDavid van Moolenbroek  *
7*b636d99dSDavid van Moolenbroek  * Redistribution and use in source and binary forms, with or without
8*b636d99dSDavid van Moolenbroek  * modification, are permitted provided that: (1) source code distributions
9*b636d99dSDavid van Moolenbroek  * retain the above copyright notice and this paragraph in its entirety, (2)
10*b636d99dSDavid van Moolenbroek  * distributions including binary code include the above copyright notice and
11*b636d99dSDavid van Moolenbroek  * this paragraph in its entirety in the documentation or other materials
12*b636d99dSDavid van Moolenbroek  * provided with the distribution, and (3) all advertising materials mentioning
13*b636d99dSDavid van Moolenbroek  * features or use of this software display the following acknowledgement:
14*b636d99dSDavid van Moolenbroek  * ``This product includes software developed by the University of California,
15*b636d99dSDavid van Moolenbroek  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16*b636d99dSDavid van Moolenbroek  * the University nor the names of its contributors may be used to endorse
17*b636d99dSDavid van Moolenbroek  * or promote products derived from this software without specific prior
18*b636d99dSDavid van Moolenbroek  * written permission.
19*b636d99dSDavid van Moolenbroek  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20*b636d99dSDavid van Moolenbroek  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21*b636d99dSDavid van Moolenbroek  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22*b636d99dSDavid van Moolenbroek  */
23*b636d99dSDavid van Moolenbroek 
24*b636d99dSDavid van Moolenbroek #include <sys/cdefs.h>
25*b636d99dSDavid van Moolenbroek #ifndef lint
26*b636d99dSDavid van Moolenbroek __RCSID("$NetBSD: print-ah.c,v 1.4 2014/11/20 03:05:03 christos Exp $");
27*b636d99dSDavid van Moolenbroek #endif
28*b636d99dSDavid van Moolenbroek 
29*b636d99dSDavid van Moolenbroek #define NETDISSECT_REWORKED
30*b636d99dSDavid van Moolenbroek #ifdef HAVE_CONFIG_H
31*b636d99dSDavid van Moolenbroek #include "config.h"
32*b636d99dSDavid van Moolenbroek #endif
33*b636d99dSDavid van Moolenbroek 
34*b636d99dSDavid van Moolenbroek #include <tcpdump-stdinc.h>
35*b636d99dSDavid van Moolenbroek 
36*b636d99dSDavid van Moolenbroek #include "ah.h"
37*b636d99dSDavid van Moolenbroek 
38*b636d99dSDavid van Moolenbroek #include "interface.h"
39*b636d99dSDavid van Moolenbroek #include "extract.h"
40*b636d99dSDavid van Moolenbroek 
41*b636d99dSDavid van Moolenbroek int
ah_print(netdissect_options * ndo,register const u_char * bp)42*b636d99dSDavid van Moolenbroek ah_print(netdissect_options *ndo, register const u_char *bp)
43*b636d99dSDavid van Moolenbroek {
44*b636d99dSDavid van Moolenbroek 	register const struct ah *ah;
45*b636d99dSDavid van Moolenbroek 	register const u_char *ep;
46*b636d99dSDavid van Moolenbroek 	int sumlen;
47*b636d99dSDavid van Moolenbroek 	uint32_t spi;
48*b636d99dSDavid van Moolenbroek 
49*b636d99dSDavid van Moolenbroek 	ah = (const struct ah *)bp;
50*b636d99dSDavid van Moolenbroek 	ep = ndo->ndo_snapend;		/* 'ep' points to the end of available data. */
51*b636d99dSDavid van Moolenbroek 
52*b636d99dSDavid van Moolenbroek 	ND_TCHECK(*ah);
53*b636d99dSDavid van Moolenbroek 
54*b636d99dSDavid van Moolenbroek 	sumlen = ah->ah_len << 2;
55*b636d99dSDavid van Moolenbroek 	spi = EXTRACT_32BITS(&ah->ah_spi);
56*b636d99dSDavid van Moolenbroek 
57*b636d99dSDavid van Moolenbroek 	ND_PRINT((ndo, "AH(spi=0x%08x", spi));
58*b636d99dSDavid van Moolenbroek 	if (ndo->ndo_vflag)
59*b636d99dSDavid van Moolenbroek 		ND_PRINT((ndo, ",sumlen=%d", sumlen));
60*b636d99dSDavid van Moolenbroek 	ND_PRINT((ndo, ",seq=0x%x", EXTRACT_32BITS(ah + 1)));
61*b636d99dSDavid van Moolenbroek 	if (bp + sizeof(struct ah) + sumlen > ep)
62*b636d99dSDavid van Moolenbroek 		ND_PRINT((ndo, "[truncated]"));
63*b636d99dSDavid van Moolenbroek 	ND_PRINT((ndo, "): "));
64*b636d99dSDavid van Moolenbroek 
65*b636d99dSDavid van Moolenbroek 	return sizeof(struct ah) + sumlen;
66*b636d99dSDavid van Moolenbroek  trunc:
67*b636d99dSDavid van Moolenbroek 	ND_PRINT((ndo, "[|AH]"));
68*b636d99dSDavid van Moolenbroek 	return -1;
69*b636d99dSDavid van Moolenbroek }
70