1 /* $OpenBSD: print-enc.c,v 1.7 2002/02/19 19:39:40 millert Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 */ 23 24 #define NETDISSECT_REWORKED 25 #ifdef HAVE_CONFIG_H 26 #include "config.h" 27 #endif 28 29 #include <tcpdump-stdinc.h> 30 31 #include "interface.h" 32 #include "extract.h" 33 34 /* From $OpenBSD: if_enc.h,v 1.8 2001/06/25 05:14:00 angelos Exp $ */ 35 /* 36 * The authors of this code are John Ioannidis (ji@tla.org), 37 * Angelos D. Keromytis (kermit@csd.uch.gr) and 38 * Niels Provos (provos@physnet.uni-hamburg.de). 39 * 40 * This code was written by John Ioannidis for BSD/OS in Athens, Greece, 41 * in November 1995. 42 * 43 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 44 * by Angelos D. Keromytis. 45 * 46 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 47 * and Niels Provos. 48 * 49 * Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis 50 * and Niels Provos. 51 * Copyright (c) 2001, Angelos D. Keromytis. 52 * 53 * Permission to use, copy, and modify this software with or without fee 54 * is hereby granted, provided that this entire notice is included in 55 * all copies of any software which is or includes a copy or 56 * modification of this software. 57 * You may use this code under the GNU public license if you so wish. Please 58 * contribute changes back to the authors under this freer than GPL license 59 * so that we may further the use of strong encryption without limitations to 60 * all. 61 * 62 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 63 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 64 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 65 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 66 * PURPOSE. 67 */ 68 69 #define ENC_HDRLEN 12 70 71 /* From $OpenBSD: mbuf.h,v 1.56 2002/01/25 15:50:23 art Exp $ */ 72 #define M_CONF 0x0400 /* packet was encrypted (ESP-transport) */ 73 #define M_AUTH 0x0800 /* packet was authenticated (AH) */ 74 75 struct enchdr { 76 uint32_t af; 77 uint32_t spi; 78 uint32_t flags; 79 }; 80 81 #define ENC_PRINT_TYPE(wh, xf, nam) \ 82 if ((wh) & (xf)) { \ 83 ND_PRINT((ndo, "%s%s", nam, (wh) == (xf) ? "): " : ",")); \ 84 (wh) &= ~(xf); \ 85 } 86 87 u_int 88 enc_if_print(netdissect_options *ndo, 89 const struct pcap_pkthdr *h, register const u_char *p) 90 { 91 register u_int length = h->len; 92 register u_int caplen = h->caplen; 93 int flags; 94 const struct enchdr *hdr; 95 96 if (caplen < ENC_HDRLEN) { 97 ND_PRINT((ndo, "[|enc]")); 98 goto out; 99 } 100 101 hdr = (struct enchdr *)p; 102 flags = hdr->flags; 103 if (flags == 0) 104 ND_PRINT((ndo, "(unprotected): ")); 105 else 106 ND_PRINT((ndo, "(")); 107 ENC_PRINT_TYPE(flags, M_AUTH, "authentic"); 108 ENC_PRINT_TYPE(flags, M_CONF, "confidential"); 109 /* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */ 110 ND_PRINT((ndo, "SPI 0x%08x: ", EXTRACT_32BITS(&hdr->spi))); 111 112 length -= ENC_HDRLEN; 113 caplen -= ENC_HDRLEN; 114 p += ENC_HDRLEN; 115 116 switch (hdr->af) { 117 case AF_INET: 118 ip_print(ndo, p, length); 119 break; 120 #ifdef AF_INET6 121 case AF_INET6: 122 ip6_print(ndo, p, length); 123 break; 124 #endif 125 } 126 127 out: 128 return (ENC_HDRLEN); 129 } 130 131 132 /* 133 * Local Variables: 134 * c-style: whitesmith 135 * c-basic-offset: 8 136 * End: 137 */ 138