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 /* \summary: Symantec Enterprise Firewall printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <netdissect-stdinc.h> 29 30 #include "netdissect.h" 31 #include "extract.h" 32 #include "ethertype.h" 33 34 #include "ether.h" 35 36 struct symantec_header { 37 uint8_t stuff1[6]; 38 uint16_t ether_type; 39 uint8_t stuff2[36]; 40 }; 41 42 static inline void 43 symantec_hdr_print(netdissect_options *ndo, register const u_char *bp, u_int length) 44 { 45 register const struct symantec_header *sp; 46 uint16_t etype; 47 48 sp = (const struct symantec_header *)bp; 49 50 etype = EXTRACT_16BITS(&sp->ether_type); 51 if (!ndo->ndo_qflag) { 52 if (etype <= ETHERMTU) 53 ND_PRINT((ndo, "invalid ethertype %u", etype)); 54 else 55 ND_PRINT((ndo, "ethertype %s (0x%04x)", 56 tok2str(ethertype_values,"Unknown", etype), 57 etype)); 58 } else { 59 if (etype <= ETHERMTU) 60 ND_PRINT((ndo, "invalid ethertype %u", etype)); 61 else 62 ND_PRINT((ndo, "%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype))); 63 } 64 65 ND_PRINT((ndo, ", length %u: ", length)); 66 } 67 68 /* 69 * This is the top level routine of the printer. 'p' points 70 * to the ether header of the packet, 'h->ts' is the timestamp, 71 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 72 * is the number of bytes actually captured. 73 */ 74 u_int 75 symantec_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 76 { 77 u_int length = h->len; 78 u_int caplen = h->caplen; 79 const struct symantec_header *sp; 80 u_short ether_type; 81 82 if (caplen < sizeof (struct symantec_header)) { 83 ND_PRINT((ndo, "[|symantec]")); 84 return caplen; 85 } 86 87 if (ndo->ndo_eflag) 88 symantec_hdr_print(ndo, p, length); 89 90 length -= sizeof (struct symantec_header); 91 caplen -= sizeof (struct symantec_header); 92 sp = (const struct symantec_header *)p; 93 p += sizeof (struct symantec_header); 94 95 ether_type = EXTRACT_16BITS(&sp->ether_type); 96 97 if (ether_type <= ETHERMTU) { 98 /* ether_type not known, print raw packet */ 99 if (!ndo->ndo_eflag) 100 symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); 101 102 if (!ndo->ndo_suppress_default_print) 103 ND_DEFAULTPRINT(p, caplen); 104 } else if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) { 105 /* ether_type not known, print raw packet */ 106 if (!ndo->ndo_eflag) 107 symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); 108 109 if (!ndo->ndo_suppress_default_print) 110 ND_DEFAULTPRINT(p, caplen); 111 } 112 113 return (sizeof (struct symantec_header)); 114 } 115