| 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 | #ifndef lint |
| 22 | static const char rcsid[] _U_ = |
| 23 | "@(#) $Header: /tcpdump/master/tcpdump/print-symantec.c,v 1.4.2.1 2005/07/07 01:24:39 guy Exp $ (LBL)"; |
| 24 | #endif |
| 25 | |
| 26 | #ifdef HAVE_CONFIG_H |
| 27 | #include "config.h" |
| 28 | #endif |
| 29 | |
| 30 | #include <tcpdump-stdinc.h> |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | #include <pcap.h> |
| 34 | |
| 35 | #include "interface.h" |
| 36 | #include "addrtoname.h" |
| 37 | #include "ethertype.h" |
| 38 | |
| 39 | #include "ether.h" |
| 40 | |
| 41 | struct symantec_header { |
| 42 | u_int8_t stuff1[6]; |
| 43 | u_int16_t ether_type; |
| 44 | u_int8_t stuff2[36]; |
| 45 | }; |
| 46 | |
| 47 | static inline void |
| 48 | symantec_hdr_print(register const u_char *bp, u_int length) |
| 49 | { |
| 50 | register const struct symantec_header *sp; |
| 51 | u_int16_t etype; |
| 52 | |
| 53 | sp = (const struct symantec_header *)bp; |
| 54 | |
| 55 | etype = ntohs(sp->ether_type); |
| 56 | if (!qflag) { |
| 57 | if (etype <= ETHERMTU) |
| 58 | (void)printf("invalid ethertype %u", etype); |
| 59 | else |
| 60 | (void)printf("ethertype %s (0x%04x)", |
| 61 | tok2str(ethertype_values,"Unknown", etype), |
| 62 | etype); |
| 63 | } else { |
| 64 | if (etype <= ETHERMTU) |
| 65 | (void)printf("invalid ethertype %u", etype); |
| 66 | else |
| 67 | (void)printf("%s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", etype)); |
| 68 | } |
| 69 | |
| 70 | (void)printf(", 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(const struct pcap_pkthdr *h, const u_char *p) |
| 81 | { |
| 82 | u_int length = h->len; |
| 83 | u_int caplen = h->caplen; |
| 84 | struct symantec_header *sp; |
| 85 | u_short ether_type; |
| 86 | u_short extracted_ether_type; |
| 87 | |
| 88 | if (caplen < sizeof (struct symantec_header)) { |
| 89 | printf("[|symantec]"); |
| 90 | return caplen; |
| 91 | } |
| 92 | |
| 93 | if (eflag) |
| 94 | symantec_hdr_print(p, length); |
| 95 | |
| 96 | length -= sizeof (struct symantec_header); |
| 97 | caplen -= sizeof (struct symantec_header); |
| 98 | sp = (struct symantec_header *)p; |
| 99 | p += sizeof (struct symantec_header); |
| 100 | |
| 101 | ether_type = ntohs(sp->ether_type); |
| 102 | |
| 103 | if (ether_type <= ETHERMTU) { |
| 104 | /* ether_type not known, print raw packet */ |
| 105 | if (!eflag) |
| 106 | symantec_hdr_print((u_char *)sp, length + sizeof (struct symantec_header)); |
| 107 | |
| 108 | if (!suppress_default_print) |
| 109 | default_print(p, caplen); |
| 110 | } else if (ether_encap_print(ether_type, p, length, caplen, |
| 111 | &extracted_ether_type) == 0) { |
| 112 | /* ether_type not known, print raw packet */ |
| 113 | if (!eflag) |
| 114 | symantec_hdr_print((u_char *)sp, length + sizeof (struct symantec_header)); |
| 115 | |
| 116 | if (!suppress_default_print) |
| 117 | default_print(p, caplen); |
| 118 | } |
| 119 | |
| 120 | return (sizeof (struct symantec_header)); |
| 121 | } |