1127668Sbms/* $OpenBSD: print-enc.c,v 1.7 2002/02/19 19:39:40 millert Exp $ */ 2127668Sbms 3127668Sbms/* 4127668Sbms * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 5127668Sbms * The Regents of the University of California. All rights reserved. 6127668Sbms * 7127668Sbms * Redistribution and use in source and binary forms, with or without 8127668Sbms * modification, are permitted provided that: (1) source code distributions 9127668Sbms * retain the above copyright notice and this paragraph in its entirety, (2) 10127668Sbms * distributions including binary code include the above copyright notice and 11127668Sbms * this paragraph in its entirety in the documentation or other materials 12127668Sbms * provided with the distribution, and (3) all advertising materials mentioning 13127668Sbms * features or use of this software display the following acknowledgement: 14127668Sbms * ``This product includes software developed by the University of California, 15127668Sbms * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16127668Sbms * the University nor the names of its contributors may be used to endorse 17127668Sbms * or promote products derived from this software without specific prior 18127668Sbms * written permission. 19127668Sbms * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20127668Sbms * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21127668Sbms * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22127668Sbms */ 23127668Sbms 24313537Sglebius/* \summary: OpenBSD IPsec encapsulation BPF layer printer */ 25313537Sglebius 26127668Sbms#ifdef HAVE_CONFIG_H 27127668Sbms#include "config.h" 28127668Sbms#endif 29127668Sbms 30313537Sglebius#include <netdissect-stdinc.h> 31127668Sbms 32313537Sglebius#include "netdissect.h" 33214478Srpaulo#include "extract.h" 34127668Sbms 35276788Sdelphij/* From $OpenBSD: if_enc.h,v 1.8 2001/06/25 05:14:00 angelos Exp $ */ 36276788Sdelphij/* 37276788Sdelphij * The authors of this code are John Ioannidis (ji@tla.org), 38276788Sdelphij * Angelos D. Keromytis (kermit@csd.uch.gr) and 39276788Sdelphij * Niels Provos (provos@physnet.uni-hamburg.de). 40276788Sdelphij * 41276788Sdelphij * This code was written by John Ioannidis for BSD/OS in Athens, Greece, 42276788Sdelphij * in November 1995. 43276788Sdelphij * 44276788Sdelphij * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 45276788Sdelphij * by Angelos D. Keromytis. 46276788Sdelphij * 47276788Sdelphij * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 48276788Sdelphij * and Niels Provos. 49276788Sdelphij * 50276788Sdelphij * Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis 51276788Sdelphij * and Niels Provos. 52276788Sdelphij * Copyright (c) 2001, Angelos D. Keromytis. 53276788Sdelphij * 54276788Sdelphij * Permission to use, copy, and modify this software with or without fee 55276788Sdelphij * is hereby granted, provided that this entire notice is included in 56276788Sdelphij * all copies of any software which is or includes a copy or 57276788Sdelphij * modification of this software. 58276788Sdelphij * You may use this code under the GNU public license if you so wish. Please 59276788Sdelphij * contribute changes back to the authors under this freer than GPL license 60276788Sdelphij * so that we may further the use of strong encryption without limitations to 61276788Sdelphij * all. 62276788Sdelphij * 63276788Sdelphij * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 64276788Sdelphij * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 65276788Sdelphij * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 66276788Sdelphij * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 67276788Sdelphij * PURPOSE. 68276788Sdelphij */ 69127668Sbms 70276788Sdelphij#define ENC_HDRLEN 12 71276788Sdelphij 72276788Sdelphij/* From $OpenBSD: mbuf.h,v 1.56 2002/01/25 15:50:23 art Exp $ */ 73276788Sdelphij#define M_CONF 0x0400 /* packet was encrypted (ESP-transport) */ 74276788Sdelphij#define M_AUTH 0x0800 /* packet was authenticated (AH) */ 75276788Sdelphij 76276788Sdelphijstruct enchdr { 77276788Sdelphij uint32_t af; 78276788Sdelphij uint32_t spi; 79276788Sdelphij uint32_t flags; 80276788Sdelphij}; 81276788Sdelphij 82127668Sbms#define ENC_PRINT_TYPE(wh, xf, nam) \ 83127668Sbms if ((wh) & (xf)) { \ 84276788Sdelphij ND_PRINT((ndo, "%s%s", nam, (wh) == (xf) ? "): " : ",")); \ 85127668Sbms (wh) &= ~(xf); \ 86127668Sbms } 87127668Sbms 88127668Sbmsu_int 89276788Sdelphijenc_if_print(netdissect_options *ndo, 90276788Sdelphij const struct pcap_pkthdr *h, register const u_char *p) 91127668Sbms{ 92127668Sbms register u_int length = h->len; 93127668Sbms register u_int caplen = h->caplen; 94127668Sbms int flags; 95127668Sbms const struct enchdr *hdr; 96127668Sbms 97127668Sbms if (caplen < ENC_HDRLEN) { 98276788Sdelphij ND_PRINT((ndo, "[|enc]")); 99127668Sbms goto out; 100127668Sbms } 101127668Sbms 102313537Sglebius hdr = (const struct enchdr *)p; 103127668Sbms flags = hdr->flags; 104127668Sbms if (flags == 0) 105276788Sdelphij ND_PRINT((ndo, "(unprotected): ")); 106127668Sbms else 107276788Sdelphij ND_PRINT((ndo, "(")); 108127668Sbms ENC_PRINT_TYPE(flags, M_AUTH, "authentic"); 109127668Sbms ENC_PRINT_TYPE(flags, M_CONF, "confidential"); 110127668Sbms /* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */ 111276788Sdelphij ND_PRINT((ndo, "SPI 0x%08x: ", EXTRACT_32BITS(&hdr->spi))); 112127668Sbms 113127668Sbms length -= ENC_HDRLEN; 114190207Srpaulo caplen -= ENC_HDRLEN; 115190207Srpaulo p += ENC_HDRLEN; 116276788Sdelphij 117190207Srpaulo switch (hdr->af) { 118190207Srpaulo case AF_INET: 119276788Sdelphij ip_print(ndo, p, length); 120190207Srpaulo break; 121285275Spkelsey#ifdef AF_INET6 122190207Srpaulo case AF_INET6: 123276788Sdelphij ip6_print(ndo, p, length); 124190207Srpaulo break; 125285275Spkelsey#endif 126190207Srpaulo } 127127668Sbms 128127668Sbmsout: 129127668Sbms return (ENC_HDRLEN); 130127668Sbms} 131146773Ssam 132146773Ssam 133146773Ssam/* 134146773Ssam * Local Variables: 135146773Ssam * c-style: whitesmith 136146773Ssam * c-basic-offset: 8 137146773Ssam * End: 138146773Ssam */ 139