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