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 1.8 2024/09/02 16:15:33 christos Exp $"); 25 #endif 26 27 /* \summary: Symantec Enterprise Firewall printer */ 28 29 #include <config.h> 30 31 #include "netdissect-stdinc.h" 32 33 #define ND_LONGJMP_FROM_TCHECK 34 #include "netdissect.h" 35 #include "extract.h" 36 #include "ethertype.h" 37 38 struct symantec_header { 39 nd_byte stuff1[6]; 40 nd_uint16_t ether_type; 41 nd_byte stuff2[36]; 42 }; 43 44 static void 45 symantec_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length) 46 { 47 const struct symantec_header *sp; 48 uint16_t etype; 49 50 sp = (const struct symantec_header *)bp; 51 52 etype = GET_BE_U_2(sp->ether_type); 53 if (!ndo->ndo_qflag) { 54 if (etype <= MAX_ETHERNET_LENGTH_VAL) 55 ND_PRINT("invalid ethertype %u", etype); 56 else 57 ND_PRINT("ethertype %s (0x%04x)", 58 tok2str(ethertype_values,"Unknown", etype), 59 etype); 60 } else { 61 if (etype <= MAX_ETHERNET_LENGTH_VAL) 62 ND_PRINT("invalid ethertype %u", etype); 63 else 64 ND_PRINT("%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype)); 65 } 66 67 ND_PRINT(", length %u: ", length); 68 } 69 70 /* 71 * This is the top level routine of the printer. 'p' points 72 * to the ether header of the packet, 'h->ts' is the timestamp, 73 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 74 * is the number of bytes actually captured. 75 */ 76 void 77 symantec_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 78 { 79 u_int length = h->len; 80 u_int caplen = h->caplen; 81 const struct symantec_header *sp; 82 u_short ether_type; 83 84 ndo->ndo_protocol = "symantec"; 85 ND_TCHECK_LEN(p, sizeof(struct symantec_header)); 86 87 ndo->ndo_ll_hdr_len += sizeof (struct symantec_header); 88 if (ndo->ndo_eflag) 89 symantec_hdr_print(ndo, p, length); 90 91 length -= sizeof (struct symantec_header); 92 caplen -= sizeof (struct symantec_header); 93 sp = (const struct symantec_header *)p; 94 p += sizeof (struct symantec_header); 95 96 ether_type = GET_BE_U_2(sp->ether_type); 97 98 if (ether_type <= MAX_ETHERNET_LENGTH_VAL) { 99 /* ether_type not known, print raw packet */ 100 if (!ndo->ndo_eflag) 101 symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); 102 103 if (!ndo->ndo_suppress_default_print) 104 ND_DEFAULTPRINT(p, caplen); 105 } else if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) { 106 /* ether_type not known, print raw packet */ 107 if (!ndo->ndo_eflag) 108 symantec_hdr_print(ndo, (const u_char *)sp, length + sizeof (struct symantec_header)); 109 110 if (!ndo->ndo_suppress_default_print) 111 ND_DEFAULTPRINT(p, caplen); 112 } 113 } 114