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 #define NETDISSECT_REWORKED 25 #ifdef HAVE_CONFIG_H 26 #include "config.h" 27 #endif 28 29 #include <tcpdump-stdinc.h> 30 31 #include "ah.h" 32 33 #include "interface.h" 34 #include "extract.h" 35 36 int 37 ah_print(netdissect_options *ndo, register const u_char *bp) 38 { 39 register const struct ah *ah; 40 register const u_char *ep; 41 int sumlen; 42 uint32_t spi; 43 44 ah = (const struct ah *)bp; 45 ep = ndo->ndo_snapend; /* 'ep' points to the end of available data. */ 46 47 ND_TCHECK(*ah); 48 49 sumlen = ah->ah_len << 2; 50 spi = EXTRACT_32BITS(&ah->ah_spi); 51 52 ND_PRINT((ndo, "AH(spi=0x%08x", spi)); 53 if (ndo->ndo_vflag) 54 ND_PRINT((ndo, ",sumlen=%d", sumlen)); 55 ND_PRINT((ndo, ",seq=0x%x", EXTRACT_32BITS(ah + 1))); 56 if (bp + sizeof(struct ah) + sumlen > ep) 57 ND_PRINT((ndo, "[truncated]")); 58 ND_PRINT((ndo, "): ")); 59 60 return sizeof(struct ah) + sumlen; 61 trunc: 62 ND_PRINT((ndo, "[|AH]")); 63 return -1; 64 } 65
