1b0453382SBill Fenner /* $NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp $ */ 2b0453382SBill Fenner 3b0453382SBill Fenner /* 4b0453382SBill Fenner * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994 5b0453382SBill Fenner * The Regents of the University of California. All rights reserved. 6b0453382SBill Fenner * 7b0453382SBill Fenner * Redistribution and use in source and binary forms, with or without 8b0453382SBill Fenner * modification, are permitted provided that: (1) source code distributions 9b0453382SBill Fenner * retain the above copyright notice and this paragraph in its entirety, (2) 10b0453382SBill Fenner * distributions including binary code include the above copyright notice and 11b0453382SBill Fenner * this paragraph in its entirety in the documentation or other materials 12b0453382SBill Fenner * provided with the distribution, and (3) all advertising materials mentioning 13b0453382SBill Fenner * features or use of this software display the following acknowledgement: 14b0453382SBill Fenner * ``This product includes software developed by the University of California, 15b0453382SBill Fenner * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16b0453382SBill Fenner * the University nor the names of its contributors may be used to endorse 17b0453382SBill Fenner * or promote products derived from this software without specific prior 18b0453382SBill Fenner * written permission. 19b0453382SBill Fenner * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20b0453382SBill Fenner * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21b0453382SBill Fenner * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22b0453382SBill Fenner */ 23b0453382SBill Fenner 243340d773SGleb Smirnoff /* \summary: IPSEC Authentication Header printer */ 253340d773SGleb Smirnoff 26*ee67461eSJoseph Mingrone #include <config.h> 27b0453382SBill Fenner 28*ee67461eSJoseph Mingrone #include "netdissect-stdinc.h" 29b0453382SBill Fenner 303340d773SGleb Smirnoff #include "netdissect.h" 315b0fe478SBruce M Simpson #include "extract.h" 32b0453382SBill Fenner 33*ee67461eSJoseph Mingrone #include "ah.h" 34b0453382SBill Fenner 35*ee67461eSJoseph Mingrone int 36*ee67461eSJoseph Mingrone ah_print(netdissect_options *ndo, const u_char *bp) 37*ee67461eSJoseph Mingrone { 38*ee67461eSJoseph Mingrone const struct ah *ah; 39*ee67461eSJoseph Mingrone uint8_t ah_len; 40*ee67461eSJoseph Mingrone u_int ah_hdr_len; 41*ee67461eSJoseph Mingrone uint16_t reserved; 42*ee67461eSJoseph Mingrone const u_char *p; 43*ee67461eSJoseph Mingrone 44*ee67461eSJoseph Mingrone ndo->ndo_protocol = "ah"; 45a90e161bSBill Fenner ah = (const struct ah *)bp; 46b0453382SBill Fenner 47*ee67461eSJoseph Mingrone nd_print_protocol_caps(ndo); 48*ee67461eSJoseph Mingrone /* 49*ee67461eSJoseph Mingrone * RFC4302 50*ee67461eSJoseph Mingrone * 51*ee67461eSJoseph Mingrone * 2.2. Payload Length 52*ee67461eSJoseph Mingrone * 53*ee67461eSJoseph Mingrone * This 8-bit field specifies the length of AH in 32-bit words (4-byte 54*ee67461eSJoseph Mingrone * units), minus "2". 55*ee67461eSJoseph Mingrone */ 56*ee67461eSJoseph Mingrone ah_len = GET_U_1(ah->ah_len); 57*ee67461eSJoseph Mingrone ah_hdr_len = (ah_len + 2) * 4; 58b0453382SBill Fenner 59*ee67461eSJoseph Mingrone ND_PRINT("("); 603c602fabSXin LI if (ndo->ndo_vflag) 61*ee67461eSJoseph Mingrone ND_PRINT("length=%u(%u-bytes),", ah_len, ah_hdr_len); 62*ee67461eSJoseph Mingrone reserved = GET_BE_U_2(ah->ah_reserved); 63*ee67461eSJoseph Mingrone if (reserved) 64*ee67461eSJoseph Mingrone ND_PRINT("reserved=0x%x[MustBeZero],", reserved); 65*ee67461eSJoseph Mingrone ND_PRINT("spi=0x%08x,", GET_BE_U_4(ah->ah_spi)); 66*ee67461eSJoseph Mingrone ND_PRINT("seq=0x%x,", GET_BE_U_4(ah->ah_seq)); 67*ee67461eSJoseph Mingrone ND_PRINT("icv=0x"); 68*ee67461eSJoseph Mingrone for (p = (const u_char *)(ah + 1); p < bp + ah_hdr_len; p++) 69*ee67461eSJoseph Mingrone ND_PRINT("%02x", GET_U_1(p)); 70*ee67461eSJoseph Mingrone ND_PRINT("): "); 71b0453382SBill Fenner 72*ee67461eSJoseph Mingrone return ah_hdr_len; 73b0453382SBill Fenner } 74