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11d3a01319
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139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/* $OpenBSD: print-enc.c,v 1.7 2002/02/19 19:39:40 millert Exp $ */
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/*
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* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* \summary: OpenBSD IPsec encapsulation BPF layer printer */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <netdissect-stdinc.h>
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#include "netdissect.h"
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#include "extract.h"
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/* From $OpenBSD: if_enc.h,v 1.8 2001/06/25 05:14:00 angelos Exp $ */
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/*
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* The authors of this code are John Ioannidis (ji@tla.org),
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* Angelos D. Keromytis (kermit@csd.uch.gr) and
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* Niels Provos (provos@physnet.uni-hamburg.de).
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*
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* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
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* in November 1995.
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*
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* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
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* by Angelos D. Keromytis.
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*
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* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
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* and Niels Provos.
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*
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* Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
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* and Niels Provos.
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* Copyright (c) 2001, Angelos D. Keromytis.
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*
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* Permission to use, copy, and modify this software with or without fee
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* is hereby granted, provided that this entire notice is included in
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* all copies of any software which is or includes a copy or
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* modification of this software.
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* You may use this code under the GNU public license if you so wish. Please
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* contribute changes back to the authors under this freer than GPL license
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* so that we may further the use of strong encryption without limitations to
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* all.
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*
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
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* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
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* PURPOSE.
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*/
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#define ENC_HDRLEN 12
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/* From $OpenBSD: mbuf.h,v 1.56 2002/01/25 15:50:23 art Exp $ */
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#define M_CONF 0x0400 /* packet was encrypted (ESP-transport) */
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#define M_AUTH 0x0800 /* packet was authenticated (AH) */
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struct enchdr {
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uint32_t af;
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uint32_t spi;
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uint32_t flags;
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};
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#define ENC_PRINT_TYPE(wh, xf, nam) \
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if ((wh) & (xf)) { \
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ND_PRINT((ndo, "%s%s", nam, (wh) == (xf) ? "): " : ",")); \
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(wh) &= ~(xf); \
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}
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u_int
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enc_if_print(netdissect_options *ndo,
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const struct pcap_pkthdr *h, register const u_char *p)
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{
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register u_int length = h->len;
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register u_int caplen = h->caplen;
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int flags;
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const struct enchdr *hdr;
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if (caplen < ENC_HDRLEN) {
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ND_PRINT((ndo, "[|enc]"));
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goto out;
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}
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hdr = (const struct enchdr *)p;
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flags = hdr->flags;
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if (flags == 0)
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ND_PRINT((ndo, "(unprotected): "));
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else
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ND_PRINT((ndo, "("));
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ENC_PRINT_TYPE(flags, M_AUTH, "authentic");
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ENC_PRINT_TYPE(flags, M_CONF, "confidential");
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/* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */
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ND_PRINT((ndo, "SPI 0x%08x: ", EXTRACT_32BITS(&hdr->spi)));
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length -= ENC_HDRLEN;
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caplen -= ENC_HDRLEN;
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p += ENC_HDRLEN;
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switch (hdr->af) {
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case AF_INET:
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ip_print(ndo, p, length);
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break;
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#ifdef AF_INET6
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case AF_INET6:
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ip6_print(ndo, p, length);
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break;
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#endif
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}
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out:
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return (ENC_HDRLEN);
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}
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/*
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* Local Variables:
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* c-style: whitesmith
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* c-basic-offset: 8
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* End:
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*/
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