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 #include <sys/cdefs.h> 25 #ifndef lint 26 __RCSID("$NetBSD: print-ah.c,v 1.4 2014/11/20 03:05:03 christos Exp $"); 27 #endif 28 29 #define NETDISSECT_REWORKED 30 #ifdef HAVE_CONFIG_H 31 #include "config.h" 32 #endif 33 34 #include <tcpdump-stdinc.h> 35 36 #include "ah.h" 37 38 #include "interface.h" 39 #include "extract.h" 40 41 int 42 ah_print(netdissect_options *ndo, register const u_char *bp) 43 { 44 register const struct ah *ah; 45 register const u_char *ep; 46 int sumlen; 47 uint32_t spi; 48 49 ah = (const struct ah *)bp; 50 ep = ndo->ndo_snapend; /* 'ep' points to the end of available data. */ 51 52 ND_TCHECK(*ah); 53 54 sumlen = ah->ah_len << 2; 55 spi = EXTRACT_32BITS(&ah->ah_spi); 56 57 ND_PRINT((ndo, "AH(spi=0x%08x", spi)); 58 if (ndo->ndo_vflag) 59 ND_PRINT((ndo, ",sumlen=%d", sumlen)); 60 ND_PRINT((ndo, ",seq=0x%x", EXTRACT_32BITS(ah + 1))); 61 if (bp + sizeof(struct ah) + sumlen > ep) 62 ND_PRINT((ndo, "[truncated]")); 63 ND_PRINT((ndo, "): ")); 64 65 return sizeof(struct ah) + sumlen; 66 trunc: 67 ND_PRINT((ndo, "[|AH]")); 68 return -1; 69 } 70