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 24b0453382SBill Fenner #ifndef lint 25b0453382SBill Fenner static const char rcsid[] = 26b0453382SBill Fenner "@(#) $Header: /tcpdump/master/tcpdump/print-ah.c,v 1.5 1999/12/15 08:10:17 fenner Exp $ (LBL)"; 27b0453382SBill Fenner #endif 28b0453382SBill Fenner 29b0453382SBill Fenner #ifdef HAVE_CONFIG_H 30b0453382SBill Fenner #include "config.h" 31b0453382SBill Fenner #endif 32b0453382SBill Fenner 33b0453382SBill Fenner #include <sys/param.h> 34b0453382SBill Fenner #include <sys/time.h> 35b0453382SBill Fenner #include <sys/types.h> 36b0453382SBill Fenner #include <sys/socket.h> 37b0453382SBill Fenner 38b0453382SBill Fenner #include <net/route.h> 39b0453382SBill Fenner #include <net/if.h> 40b0453382SBill Fenner 41b0453382SBill Fenner #include <netinet/in.h> 42b0453382SBill Fenner #include <netinet/if_ether.h> 43b0453382SBill Fenner #include <netinet/in_systm.h> 44b0453382SBill Fenner #include <netinet/ip.h> 45b0453382SBill Fenner #include <netinet/ip_icmp.h> 46b0453382SBill Fenner #include <netinet/ip_var.h> 47b0453382SBill Fenner #include <netinet/udp.h> 48b0453382SBill Fenner #include <netinet/udp_var.h> 49b0453382SBill Fenner #include <netinet/tcp.h> 50b0453382SBill Fenner 51b0453382SBill Fenner #include <stdio.h> 52b0453382SBill Fenner 53b0453382SBill Fenner /* there's no standard definition so we are on our own */ 54b0453382SBill Fenner struct ah { 55b0453382SBill Fenner u_int8_t ah_nxt; /* Next Header */ 56b0453382SBill Fenner u_int8_t ah_len; /* Length of data, in 32bit */ 57b0453382SBill Fenner u_int16_t ah_reserve; /* Reserved for future use */ 58b0453382SBill Fenner u_int32_t ah_spi; /* Security parameter index */ 59b0453382SBill Fenner /* variable size, 32bit bound*/ /* Authentication data */ 60b0453382SBill Fenner }; 61b0453382SBill Fenner 62b0453382SBill Fenner struct newah { 63b0453382SBill Fenner u_int8_t ah_nxt; /* Next Header */ 64b0453382SBill Fenner u_int8_t ah_len; /* Length of data + 1, in 32bit */ 65b0453382SBill Fenner u_int16_t ah_reserve; /* Reserved for future use */ 66b0453382SBill Fenner u_int32_t ah_spi; /* Security parameter index */ 67b0453382SBill Fenner u_int32_t ah_seq; /* Sequence number field */ 68b0453382SBill Fenner /* variable size, 32bit bound*/ /* Authentication data */ 69b0453382SBill Fenner }; 70b0453382SBill Fenner 71b0453382SBill Fenner #include "interface.h" 72b0453382SBill Fenner #include "addrtoname.h" 73b0453382SBill Fenner 74b0453382SBill Fenner int 75b0453382SBill Fenner ah_print(register const u_char *bp, register const u_char *bp2) 76b0453382SBill Fenner { 77b0453382SBill Fenner register const struct ah *ah; 78b0453382SBill Fenner register const u_char *ep; 79b0453382SBill Fenner int sumlen; 80b0453382SBill Fenner u_int32_t spi; 81b0453382SBill Fenner 82b0453382SBill Fenner ah = (struct ah *)bp; 83b0453382SBill Fenner ep = snapend; /* 'ep' points to the end of avaible data. */ 84b0453382SBill Fenner 85b0453382SBill Fenner if ((u_char *)(ah + 1) >= ep - sizeof(struct ah)) 86b0453382SBill Fenner goto trunc; 87b0453382SBill Fenner 88b0453382SBill Fenner sumlen = ah->ah_len << 2; 89b0453382SBill Fenner spi = (u_int32_t)ntohl(ah->ah_spi); 90b0453382SBill Fenner 91b0453382SBill Fenner printf("AH(spi=%u", spi); 92b0453382SBill Fenner if (vflag) 93b0453382SBill Fenner printf(",sumlen=%d", sumlen); 94b0453382SBill Fenner printf(",seq=0x%x", (u_int32_t)ntohl(*(u_int32_t *)(ah + 1))); 95b0453382SBill Fenner if (bp + sizeof(struct ah) + sumlen > ep) 96b0453382SBill Fenner fputs("[truncated]", stdout); 97b0453382SBill Fenner fputs("): ", stdout); 98b0453382SBill Fenner 99b0453382SBill Fenner return sizeof(struct ah) + sumlen; 100b0453382SBill Fenner trunc: 101b0453382SBill Fenner fputs("[|AH]", stdout); 102b0453382SBill Fenner return 65535; 103b0453382SBill Fenner } 104