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138 lines
4.2 KiB
138 lines
4.2 KiB
/* $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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