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 #include <sys/cdefs.h> 25 #ifndef lint 26 __RCSID("$NetBSD: print-enc.c,v 1.7 2017/02/05 04:05:05 spz Exp $"); 27 #endif 28 29 /* \summary: OpenBSD IPsec encapsulation BPF layer printer */ 30 31 #ifdef HAVE_CONFIG_H 32 #include "config.h" 33 #endif 34 35 #include <netdissect-stdinc.h> 36 37 #include "netdissect.h" 38 #include "extract.h" 39 40 /* From $OpenBSD: if_enc.h,v 1.8 2001/06/25 05:14:00 angelos Exp $ */ 41 /* 42 * The authors of this code are John Ioannidis (ji@tla.org), 43 * Angelos D. Keromytis (kermit@csd.uch.gr) and 44 * Niels Provos (provos@physnet.uni-hamburg.de). 45 * 46 * This code was written by John Ioannidis for BSD/OS in Athens, Greece, 47 * in November 1995. 48 * 49 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 50 * by Angelos D. Keromytis. 51 * 52 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 53 * and Niels Provos. 54 * 55 * Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis 56 * and Niels Provos. 57 * Copyright (c) 2001, Angelos D. Keromytis. 58 * 59 * Permission to use, copy, and modify this software with or without fee 60 * is hereby granted, provided that this entire notice is included in 61 * all copies of any software which is or includes a copy or 62 * modification of this software. 63 * You may use this code under the GNU public license if you so wish. Please 64 * contribute changes back to the authors under this freer than GPL license 65 * so that we may further the use of strong encryption without limitations to 66 * all. 67 * 68 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 69 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 70 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 71 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 72 * PURPOSE. 73 */ 74 75 #define ENC_HDRLEN 12 76 77 /* From $OpenBSD: mbuf.h,v 1.56 2002/01/25 15:50:23 art Exp $ */ 78 #define M_CONF 0x0400 /* packet was encrypted (ESP-transport) */ 79 #define M_AUTH 0x0800 /* packet was authenticated (AH) */ 80 81 struct enchdr { 82 uint32_t af; 83 uint32_t spi; 84 uint32_t flags; 85 }; 86 87 #define ENC_PRINT_TYPE(wh, xf, nam) \ 88 if ((wh) & (xf)) { \ 89 ND_PRINT((ndo, "%s%s", nam, (wh) == (xf) ? "): " : ",")); \ 90 (wh) &= ~(xf); \ 91 } 92 93 u_int 94 enc_if_print(netdissect_options *ndo, 95 const struct pcap_pkthdr *h, register const u_char *p) 96 { 97 register u_int length = h->len; 98 register u_int caplen = h->caplen; 99 int flags; 100 const struct enchdr *hdr; 101 102 if (caplen < ENC_HDRLEN) { 103 ND_PRINT((ndo, "[|enc]")); 104 goto out; 105 } 106 107 hdr = (const struct enchdr *)p; 108 flags = hdr->flags; 109 if (flags == 0) 110 ND_PRINT((ndo, "(unprotected): ")); 111 else 112 ND_PRINT((ndo, "(")); 113 ENC_PRINT_TYPE(flags, M_AUTH, "authentic"); 114 ENC_PRINT_TYPE(flags, M_CONF, "confidential"); 115 /* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */ 116 ND_PRINT((ndo, "SPI 0x%08x: ", EXTRACT_32BITS(&hdr->spi))); 117 118 length -= ENC_HDRLEN; 119 caplen -= ENC_HDRLEN; 120 p += ENC_HDRLEN; 121 122 switch (hdr->af) { 123 case AF_INET: 124 ip_print(ndo, p, length); 125 break; 126 #ifdef AF_INET6 127 case AF_INET6: 128 ip6_print(ndo, p, length); 129 break; 130 #endif 131 } 132 133 out: 134 return (ENC_HDRLEN); 135 } 136 137 138 /* 139 * Local Variables: 140 * c-style: whitesmith 141 * c-basic-offset: 8 142 * End: 143 */ 144