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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* packet-ipoib.c
* Routines for decoding IP over InfiniBand (IPoIB) packet disassembly
* See: https://tools.ietf.org/html/rfc4391#section-6
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/etypes.h>
#include <wiretap/wtap.h>
void proto_register_ipoib(void);
void proto_reg_handoff_ipoib(void);
static dissector_handle_t ipoib_handle;
static int proto_ipoib;
static int hf_dgid;
static int hf_daddr;
static int hf_daddr_qpn;
static int hf_grh;
static int hf_grh_ip_version;
static int hf_grh_traffic_class;
static int hf_grh_flow_label;
static int hf_grh_sqpn;
static int hf_grh_sgid;
static int hf_type;
static int hf_reserved;
static int ett_raw;
static int ett_hdr;
static dissector_handle_t arp_handle;
static dissector_handle_t ip_handle;
static dissector_handle_t ipv6_handle;
static int
dissect_ipoib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_tree *fh_tree;
proto_tree *fh_subtree;
proto_item *ti;
tvbuff_t *next_tvb;
uint16_t type;
int grh_size = 0;
if (pinfo->rec->rec_header.packet_header.pkt_encap == WTAP_ENCAP_IP_OVER_IB_PCAP)
grh_size = 40;
/* load the top pane info. This should be overwritten by
the next protocol in the stack */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPoIB");
col_set_str(pinfo->cinfo, COL_INFO, "IP over Infiniband");
/* populate a tree in the second pane with the IPoIB header data */
if (tree) {
ti = proto_tree_add_item (tree, proto_ipoib, tvb, 0, grh_size + 4, ENC_NA);
fh_tree = proto_item_add_subtree(ti, ett_raw);
/* for PCAP data populate subtree with GRH pseudo header data */
if (pinfo->rec->rec_header.packet_header.pkt_encap == WTAP_ENCAP_IP_OVER_IB_PCAP) {
/* Zero means GRH is not valid (unicast). Only destination
address is set. */
if (tvb_get_ntohs(tvb, 0) == 0) {
ti = proto_tree_add_item (fh_tree, hf_daddr, tvb, 20, 20, ENC_NA);
fh_subtree = proto_item_add_subtree(ti, ett_hdr);
proto_tree_add_item(fh_subtree, hf_daddr_qpn, tvb, 21, 3, ENC_BIG_ENDIAN);
proto_tree_add_item(fh_subtree, hf_dgid, tvb, 24, 16, ENC_NA);
} else {
ti = proto_tree_add_item (fh_tree, hf_grh, tvb, 0, 40, ENC_NA);
fh_subtree = proto_item_add_subtree(ti, ett_hdr);
proto_tree_add_item(fh_subtree, hf_grh_ip_version, tvb, 0, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(fh_subtree, hf_grh_traffic_class, tvb, 0, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(fh_subtree, hf_grh_flow_label,tvb, 0, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(fh_subtree, hf_grh_sqpn, tvb, 5, 3, ENC_BIG_ENDIAN);
proto_tree_add_item(fh_subtree, hf_grh_sgid, tvb, 8, 16, ENC_NA);
proto_tree_add_item(fh_subtree, hf_dgid, tvb, 24, 16, ENC_NA);
}
}
proto_tree_add_item(fh_tree, hf_type, tvb, grh_size + 0, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(fh_tree, hf_reserved, tvb, grh_size + 2, 2, ENC_BIG_ENDIAN);
}
next_tvb = tvb_new_subset_remaining(tvb, grh_size + 4);
type = tvb_get_ntohs(tvb, grh_size + 0);
switch (type) {
case ETHERTYPE_IP:
call_dissector(ip_handle, next_tvb, pinfo, tree);
break;
case ETHERTYPE_IPv6:
call_dissector(ipv6_handle, next_tvb, pinfo, tree);
break;
case ETHERTYPE_ARP:
case ETHERTYPE_REVARP:
call_dissector(arp_handle, next_tvb, pinfo, tree);
break;
default:
break;
}
return tvb_captured_length(tvb);
}
void
proto_register_ipoib(void)
{
static hf_register_info hf[] = {
{ &hf_daddr,
{ "Destination address", "ipoib.daddr",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_daddr_qpn,
{ "Destination QPN", "ipoib.daddr.qpn",
FT_UINT24, BASE_HEX, NULL, 0x0,
NULL, HFILL}},
{ &hf_dgid,
{ "Destination GID", "ipoib.dgid",
FT_IPv6, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_grh,
{ "Global Route Header", "ipoib.grh",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL}},
{ &hf_grh_ip_version, {
"IP Version", "ipoib.grh.ipver",
FT_UINT8, BASE_DEC, NULL, 0xF0,
NULL, HFILL}},
{ &hf_grh_traffic_class, {
"Traffic Class", "ipoib.grh.tclass",
FT_UINT16, BASE_DEC, NULL, 0x0FF0,
NULL, HFILL}},
{ &hf_grh_flow_label, {
"Flow Label", "ipoib.grh.flowlabel",
FT_UINT32, BASE_DEC, NULL, 0x000FFFFF,
NULL, HFILL}},
{ &hf_grh_sqpn,
{ "Source QPN", "ipoib.grh.sqpn",
FT_UINT24, BASE_HEX, NULL, 0x0,
NULL, HFILL}},
{ &hf_grh_sgid,
{ "Source GID", "ipoib.grh.sgid",
FT_IPv6, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_type,
{ "Type", "ipoib.type",
FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0,
NULL, HFILL }},
{ &hf_reserved,
{ "Reserved", "ipoib.reserved",
FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }}
};
static int *ett[] = {
&ett_raw,
&ett_hdr
};
proto_ipoib = proto_register_protocol("IP over Infiniband", "IPoIB", "ipoib");
proto_register_field_array(proto_ipoib, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
ipoib_handle = register_dissector("ipoib", dissect_ipoib, proto_ipoib);
}
void
proto_reg_handoff_ipoib(void)
{
/*
* Get handles for the ARP, IP and IPv6 dissectors.
*/
arp_handle = find_dissector_add_dependency("arp", proto_ipoib);
ip_handle = find_dissector_add_dependency("ip", proto_ipoib);
ipv6_handle = find_dissector_add_dependency("ipv6", proto_ipoib);
dissector_add_uint("wtap_encap", WTAP_ENCAP_IP_OVER_IB_SNOOP, ipoib_handle);
dissector_add_uint("wtap_encap", WTAP_ENCAP_IP_OVER_IB_PCAP, ipoib_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
|
