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