1 /* 2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 #include <sys/cdefs.h> 23 #ifndef lint 24 __RCSID("$NetBSD: print-symantec.c,v 1.6 2017/02/05 04:05:05 spz Exp $"); 25 #endif 26 27 /* \summary: Symantec Enterprise Firewall printer */ 28 29 #ifdef HAVE_CONFIG_H 30 #include "config.h" 31 #endif 32 33 #include <netdissect-stdinc.h> 34 35 #include "netdissect.h" 36 #include "extract.h" 37 #include "ethertype.h" 38 39 #include "ether.h" 40 41 struct symantec_header { 42 uint8_t stuff1[6]; 43 uint16_t ether_type; 44 uint8_t stuff2[36]; 45 }; 46 47 static inline void 48 symantec_hdr_print(netdissect_options *ndo, register const u_char *bp, u_int length) 49 { 50 register const struct symantec_header *sp; 51 uint16_t etype; 52 53 sp = (const struct symantec_header *)bp; 54 55 etype = EXTRACT_16BITS(&sp->ether_type); 56 if (!ndo->ndo_qflag) { 57 if (etype <= ETHERMTU) 58 ND_PRINT((ndo, "invalid ethertype %u", etype)); 59 else 60 ND_PRINT((ndo, "ethertype %s (0x%04x)", 61 tok2str(ethertype_values,"Unknown", etype), 62 etype)); 63 } else { 64 if (etype <= ETHERMTU) 65 ND_PRINT((ndo, "invalid ethertype %u", etype)); 66 else 67 ND_PRINT((ndo, "%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype))); 68 } 69 70 ND_PRINT((ndo, ", length %u: ", length)); 71 } 72 73 /* 74 * This is the top level routine of the printer. 'p' points 75 * to the ether header of the packet, 'h->ts' is the timestamp, 76 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 77 * is the number of bytes actually captured. 78 */ 79 u_int 80 symantec_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 81 { 82 u_int length = h->len; 83 u_int caplen = h->caplen; 84 const struct symantec_header *sp; 85 u_short ether_type; 86 87 if (caplen < sizeof (struct symantec_header)) { 88 ND_PRINT((ndo, "[|symantec]")); 89 return caplen; 90 } 91 92 if (ndo->ndo_eflag) 93 symantec_hdr_print(ndo, p, length); 94 95 length -= sizeof (struct symantec_header); 96 caplen -= sizeof (struct symantec_header); 97 sp = (const struct symantec_header *)p; 98 p += sizeof (struct symantec_header); 99 100 ether_type = EXTRACT_16BITS(&sp->ether_type); 101 102 if (ether_type <= ETHERMTU) { 103 /* ether_type not known, print raw packet */ 104 if (!ndo->ndo_eflag) 105 symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); 106 107 if (!ndo->ndo_suppress_default_print) 108 ND_DEFAULTPRINT(p, caplen); 109 } else if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) { 110 /* ether_type not known, print raw packet */ 111 if (!ndo->ndo_eflag) 112 symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); 113 114 if (!ndo->ndo_suppress_default_print) 115 ND_DEFAULTPRINT(p, caplen); 116 } 117 118 return (sizeof (struct symantec_header)); 119 } 120