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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
* 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.
*/
/* \summary: Broadcom LI Printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
#define BCM_LI_SHIM_LEN 4
static const struct tok bcm_li_direction_values[] = {
{ 1, "unused" },
{ 2, "egress" },
{ 3, "ingress" },
{ 0, NULL}
};
#define BCM_LI_PKT_TYPE_UNDECIDED 4
#define BCM_LI_PKT_TYPE_IPV4 5
#define BCM_LI_PKT_TYPE_IPV6 6
#define BCM_LI_PKT_TYPE_ETHERNET 7
static const struct tok bcm_li_pkt_type_values[] = {
{ BCM_LI_PKT_TYPE_UNDECIDED, "undecided" },
{ BCM_LI_PKT_TYPE_IPV4, "ipv4" },
{ BCM_LI_PKT_TYPE_IPV6, "ipv6" },
{ BCM_LI_PKT_TYPE_ETHERNET, "ethernet" },
{ 0, NULL}
};
static const struct tok bcm_li_pkt_subtype_values[] = {
{ 1, "single VLAN tag" },
{ 2, "double VLAN tag" },
{ 3, "untagged" },
{ 0, NULL}
};
void
bcm_li_print(netdissect_options *ndo,
const u_char *bp, u_int length)
{
u_int shim, direction, pkt_type, pkt_subtype, li_id;
ndo->ndo_protocol = "bcm_li";
if (length < BCM_LI_SHIM_LEN) {
ND_PRINT(" (length %u < %u)", length, BCM_LI_SHIM_LEN);
goto invalid;
}
shim = GET_BE_U_4(bp);
direction = (shim >> 29) & 0x7;
pkt_type = (shim >> 25) & 0xf;
pkt_subtype = (shim >> 22) & 0x7;
li_id = shim & 0x3fffff;
length -= BCM_LI_SHIM_LEN;
bp += BCM_LI_SHIM_LEN;
ND_PRINT("%sBCM-LI-SHIM: direction %s, pkt-type %s, pkt-subtype %s, li-id %u%s",
ndo->ndo_vflag ? "\n " : "",
tok2str(bcm_li_direction_values, "unknown", direction),
tok2str(bcm_li_pkt_type_values, "unknown", pkt_type),
tok2str(bcm_li_pkt_subtype_values, "unknown", pkt_subtype),
li_id,
ndo->ndo_vflag ? "\n ": "");
if (!ndo->ndo_vflag) {
ND_TCHECK_LEN(bp, length);
return;
}
switch (pkt_type) {
case BCM_LI_PKT_TYPE_ETHERNET:
ether_print(ndo, bp, length, ND_BYTES_AVAILABLE_AFTER(bp), NULL, NULL);
break;
case BCM_LI_PKT_TYPE_IPV4:
ip_print(ndo, bp, length);
break;
case BCM_LI_PKT_TYPE_IPV6:
ip6_print(ndo, bp, length);
break;
case BCM_LI_PKT_TYPE_UNDECIDED:
/*
* Guess IP version from first nibble.
*/
if ((GET_U_1(bp) >> 4) == 4) {
ip_print(ndo, bp, length);
} else if ((GET_U_1(bp) >> 4) == 6) {
ip6_print(ndo, bp, length);
} else {
ND_PRINT("unknown payload");
}
break;
default:
goto invalid;
}
return;
invalid:
nd_print_invalid(ndo);
}
|
