104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
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/* $NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp $ */
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/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/tcpdump/print-ah.c,v 1.5 1999/12/15 08:10:17 fenner Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/route.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/tcp.h>
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#include <stdio.h>
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/* there's no standard definition so we are on our own */
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struct ah {
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u_int8_t ah_nxt; /* Next Header */
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u_int8_t ah_len; /* Length of data, in 32bit */
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u_int16_t ah_reserve; /* Reserved for future use */
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u_int32_t ah_spi; /* Security parameter index */
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/* variable size, 32bit bound*/ /* Authentication data */
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};
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struct newah {
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u_int8_t ah_nxt; /* Next Header */
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u_int8_t ah_len; /* Length of data + 1, in 32bit */
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u_int16_t ah_reserve; /* Reserved for future use */
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u_int32_t ah_spi; /* Security parameter index */
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u_int32_t ah_seq; /* Sequence number field */
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/* variable size, 32bit bound*/ /* Authentication data */
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};
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#include "interface.h"
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#include "addrtoname.h"
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int
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ah_print(register const u_char *bp, register const u_char *bp2)
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{
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register const struct ah *ah;
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register const u_char *ep;
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int sumlen;
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u_int32_t spi;
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ah = (struct ah *)bp;
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ep = snapend; /* 'ep' points to the end of avaible data. */
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if ((u_char *)(ah + 1) >= ep - sizeof(struct ah))
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goto trunc;
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sumlen = ah->ah_len << 2;
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spi = (u_int32_t)ntohl(ah->ah_spi);
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printf("AH(spi=%u", spi);
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if (vflag)
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printf(",sumlen=%d", sumlen);
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printf(",seq=0x%x", (u_int32_t)ntohl(*(u_int32_t *)(ah + 1)));
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if (bp + sizeof(struct ah) + sumlen > ep)
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fputs("[truncated]", stdout);
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fputs("): ", stdout);
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return sizeof(struct ah) + sumlen;
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trunc:
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fputs("[|AH]", stdout);
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return 65535;
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}
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