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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* packet-hp-erm.c
* Routines for the disassembly of HP ProCurve encapsulated remote mirroring frames
* (Adapted from packet-cisco-erspan.c and packet-vlan.c)
*
* Copyright 2010 2012 William Meier <wmeier [AT] newsguy.com>,
* Zdravko Velinov <z.velinov [AT] vkv5.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* For some information on HP Procurve encapsulated remote mirroring see
* "Traffic Mirroring" in Appendix B of the HP manual
* "Management and Configuration Guide for the ProCurve Series
* 3500, 3500yl, 5400zl, 6200yl, 6600, and 8200zl Switches (September 2009)"
*
* Format:
* The above manual indicates that the encapsulatedmirrored frame is transmitted
* on the network as a [UDP] packet which has 54 bytes preceding the mirrored frame.
* Examining a sample capture shows that this means that the data payload
* of the UDP packet consists of a 12 byte "header" followed by the
* bytes of the mirrored frame.
*
* After some additional tests, which involved injecting 802.1Q frames with
* different priorities and VLAN identifiers. It was determined that the HP
* ERM header has a part inside its header that closely resembles the 802.1Q
* header. The only difference is the priority numbering.
*/
#include "config.h"
#include <epan/packet.h>
void proto_register_hp_erm(void);
void proto_reg_handoff_hp_erm(void);
#define PROTO_SHORT_NAME "HP_ERM"
#define PROTO_LONG_NAME "HP encapsulated remote mirroring"
static int proto_hp_erm = -1;
static gint ett_hp_erm = -1;
static int hf_hp_erm_unknown1 = -1;
static int hf_hp_erm_unknown2 = -1;
static int hf_hp_erm_unknown3 = -1;
static int hf_hp_erm_priority = -1;
static int hf_hp_erm_cfi = -1;
static int hf_hp_erm_vlan = -1;
static int hf_hp_erm_is_tagged = -1;
static const value_string hp_erm_pri_vals[] = {
{ 0, "Background" },
{ 1, "Spare" },
{ 2, "Best Effort (default)" },
{ 3, "Excellent Effort" },
{ 4, "Controlled Load" },
{ 5, "Video, < 100ms latency and jitter" },
{ 6, "Voice, < 10ms latency and jitter" },
{ 7, "Network Control" },
{ 0, NULL }
};
static const true_false_string hp_erm_canonical = { "Non-canonical", "Canonical" };
static dissector_handle_t eth_withoutfcs_handle;
static int
dissect_hp_erm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *hp_erm_tree;
tvbuff_t *eth_tvb;
int offset = 0;
int * const flags[] = {
&hf_hp_erm_unknown2,
&hf_hp_erm_priority,
&hf_hp_erm_cfi,
&hf_hp_erm_vlan,
&hf_hp_erm_is_tagged,
&hf_hp_erm_unknown3,
NULL
};
col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME ":");
ti = proto_tree_add_item(tree, proto_hp_erm, tvb, 0, -1, ENC_NA);
hp_erm_tree = proto_item_add_subtree(ti, ett_hp_erm);
proto_tree_add_item(hp_erm_tree, hf_hp_erm_unknown1, tvb, offset, 8, ENC_NA);
offset += 8;
proto_tree_add_bitmask_list(hp_erm_tree, tvb, offset, 4, flags, ENC_BIG_ENDIAN);
offset += 4;
eth_tvb = tvb_new_subset_remaining(tvb, offset);
call_dissector(eth_withoutfcs_handle, eth_tvb, pinfo, tree);
return tvb_captured_length(tvb);
}
void
proto_register_hp_erm(void)
{
static hf_register_info hf[] = {
{ &hf_hp_erm_unknown1,
{ "Unknown1", "hp_erm.unknown1", FT_BYTES, BASE_NONE, NULL,
0x0, NULL, HFILL }},
{ &hf_hp_erm_unknown2,
{ "Unknown2", "hp_erm.unknown2", FT_UINT32, BASE_DEC, NULL,
0xFF000000, NULL, HFILL }},
{ &hf_hp_erm_priority,
{ "Priority", "hp_erm.priority", FT_UINT32, BASE_DEC, VALS(hp_erm_pri_vals),
0x00E00000, NULL, HFILL }},
{ &hf_hp_erm_cfi,
{ "CFI", "hp_erm.cfi", FT_BOOLEAN, 32, TFS(&hp_erm_canonical),
0x00100000, NULL, HFILL }},
{ &hf_hp_erm_vlan,
{ "Vlan", "hp_erm.vlan", FT_UINT32, BASE_DEC, NULL,
0x000FFF00, NULL, HFILL }},
{ &hf_hp_erm_is_tagged,
{ "Is_Tagged", "hp_erm.is_tagged", FT_BOOLEAN, 32, TFS(&tfs_yes_no),
0x00000080, NULL, HFILL }},
{ &hf_hp_erm_unknown3,
{ "Unknown3", "hp_erm.unknown3", FT_UINT32, BASE_DEC, NULL,
0x0000007F, NULL, HFILL }}
};
static gint *ett[] = {
&ett_hp_erm,
};
proto_hp_erm = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "hp_erm");
proto_register_field_array(proto_hp_erm, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_hp_erm(void)
{
dissector_handle_t hp_erm_handle;
eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_hp_erm);
hp_erm_handle = create_dissector_handle(dissect_hp_erm, proto_hp_erm);
dissector_add_for_decode_as_with_preference("udp.port", hp_erm_handle);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
|
