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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <epan/packet.h>
#include <gmodule.h>
#define WS_BUILD_DLL
#include "ws_symbol_export.h"
#include "config.h"
#include "epan/proto.h"
#include <hicn/hicn.h>
#define PATHLABEL_PAD_LEN 3 // To remove once fixed in libhicn
// These should be defined in libhicn
#define TIMESCALE_BITS_OFFSET 4
#define TIMESCALE_BITS_LENGTH 4
#define HICN_VERSION "0.0.1"
/* TCP-HICN flags */
#define FLAGS_BITS_LEN 8
#define FLAGS_MASK 0xFF
#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_ACK 0x10
#define TH_CWR 0x80
#define TH_ID 0x40
#define TH_MAN 0x20
#define TH_SIG 0x08
#define HICN_PORT 9695
WS_DLL_PUBLIC_DEF const gchar plugin_version[] = HICN_VERSION;
WS_DLL_PUBLIC_DEF const int plugin_want_major = VERSION_MAJOR;
WS_DLL_PUBLIC_DEF const int plugin_want_minor = VERSION_MINOR;
WS_DLL_PUBLIC void plugin_register(void);
static void proto_register_hicn(void);
static void proto_reg_handoff_hicn(void);
static int proto_hicn = -1;
static int hf_hicn_ipv6_src = -1;
static int hf_hicn_ipv6_src_data = -1;
static int hf_hicn_ipv6_dst = -1;
static int hf_hicn_ipv6_dst_interest = -1;
static int hf_hicn_tcp_namesuffix = -1;
static int hf_hicn_tcp_pathlabel = -1;
static int hf_hicn_tcp_hdrlen_timescale = -1;
static int hf_hicn_tcp_hdrlen = -1;
static int hf_hicn_tcp_timescale = -1;
static int hf_hicn_tcp_flags = -1;
static int hf_hicn_tcp_flags_cwr = -1;
static int hf_hicn_tcp_flags_man = -1;
static int hf_hicn_tcp_flags_id = -1;
static int hf_hicn_tcp_flags_ack = -1;
static int hf_hicn_tcp_flags_sig = -1;
static int hf_hicn_tcp_flags_rst = -1;
static int hf_hicn_tcp_flags_syn = -1;
static int hf_hicn_tcp_flags_fin = -1;
static int hf_hicn_tcp_ldr = -1;
static int hf_hicn_tcp_csum = -1;
static int hf_hicn_tcp_lifetime = -1;
static gint ett_hicn = -1;
static gint ett_hicn_l3 = -1;
static gint ett_hicn_l4 = -1;
static gint ett_hicn_l4_flags = -1;
static uint8_t *_p_hdr = NULL;
bool is_interest(const hicn_header_t *header) {
bool is_interest = false;
hicn_packet_test_ece(header, &is_interest);
return !is_interest;
}
// TODO: HANDLE ERRORS
hicn_header_t *get_header(tvbuff_t *tvb, const gint offset, const gint length){
tvb_ensure_bytes_exist(tvb, offset, length);
hicn_header_t *pkt_hdr = (hicn_header_t *) tvb_get_ptr(tvb, offset, length);
_p_hdr = (uint8_t *) pkt_hdr;
return pkt_hdr;
}
uint32_t get_offset(uint8_t *data_addr){
return data_addr - _p_hdr;
}
static int
dissect_hicn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
gint i = 0;
guint bpos;
hicn_header_t *pkt_hdr = get_header(tvb, 0, HICN_V6_TCP_HDRLEN);
wmem_strbuf_t *flags_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
static const gchar *flags[] = {"_FIN", "_SYN", "_RST", "SIG", "_ACK", "MAN", "ID", "_CWR"};
wmem_strbuf_append(flags_strbuf, "<None>");
uint32_t flags_offset = get_offset((uint8_t *) &(pkt_hdr->v6.tcp.flags));
gboolean first_flag = TRUE;
for(i=0; i<9; i++) {
bpos = 1 << i;
if(pkt_hdr->v6.tcp.flags & bpos) {
if(first_flag) {
wmem_strbuf_truncate(flags_strbuf, 0);
}
wmem_strbuf_append_printf(flags_strbuf, "%s%s", first_flag ? "" : ", ", flags[i]);
first_flag = FALSE;
}
}
// DISPLAY SECTION
col_set_str(pinfo->cinfo, COL_PROTOCOL, "HICN");
col_clear(pinfo->cinfo, COL_INFO);
proto_item *ti = proto_tree_add_item(tree, proto_hicn, tvb, 0, HICN_V6_TCP_HDRLEN, ENC_NA);
proto_tree *hicn_tree = proto_item_add_subtree(ti, ett_hicn);
// L3
proto_item *ti_l3;
proto_tree *hicn_l3_tree = proto_tree_add_subtree(hicn_tree, tvb, 0, IPV6_HDRLEN, ett_hicn_l3, &ti_l3, "HICN Layer 3");
if(is_interest(pkt_hdr)){
proto_item_append_text(ti, ", Interest Packet");
col_set_str(pinfo->cinfo, COL_INFO, "Interest Packet");
proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_src, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.saddr)), sizeof(pkt_hdr->v6.ip.saddr), ENC_BIG_ENDIAN);
proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_dst_interest, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.daddr)), sizeof(pkt_hdr->v6.ip.daddr), ENC_BIG_ENDIAN);
} else {
// TODO: NEW LABEL FOR NACKS
proto_item_append_text(ti, ", Data Packet");
col_set_str(pinfo->cinfo, COL_INFO, "Data Packet");
proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_src_data, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.saddr)), sizeof(pkt_hdr->v6.ip.saddr), ENC_BIG_ENDIAN);
proto_tree_add_item(hicn_l3_tree, hf_hicn_ipv6_dst, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.ip.daddr)), sizeof(pkt_hdr->v6.ip.daddr), ENC_BIG_ENDIAN);
}
// L4
proto_item *ti_l4;
proto_tree *hicn_l4_tree = proto_tree_add_subtree(hicn_tree, tvb, IPV6_HDRLEN, TCP_HDRLEN, ett_hicn_l4, &ti_l4, "HICN Layer 4");
proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_namesuffix, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.name_suffix)), sizeof(pkt_hdr->v6.tcp.name_suffix), ENC_BIG_ENDIAN);
proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_pathlabel, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.pathlabel))+PATHLABEL_PAD_LEN, sizeof(pkt_hdr->v6.tcp.pathlabel), ENC_BIG_ENDIAN);
proto_item *ti_l4_ts = proto_tree_add_bits_item(hicn_l4_tree, hf_hicn_tcp_timescale, tvb,
get_offset((uint8_t *) &(pkt_hdr->v6.tcp.data_offset_and_reserved))*8 + TIMESCALE_BITS_OFFSET, TIMESCALE_BITS_LENGTH, ENC_BIG_ENDIAN);
proto_item_append_text(ti_l4_ts, " (Lifetime scaling factor: %dx)", pkt_hdr->v6.tcp.timescale+1);
proto_item *hicn_l4_flags_tree = proto_tree_add_uint_format_value(hicn_l4_tree, hf_hicn_tcp_flags, tvb,
get_offset((uint8_t *) &(pkt_hdr->v6.tcp.flags)), 1, pkt_hdr->v6.tcp.flags, "0x%02x (%s)", pkt_hdr->v6.tcp.flags, wmem_strbuf_get_str(flags_strbuf)
);
proto_tree *field_tree = proto_item_add_subtree(hicn_l4_flags_tree, ett_hicn_l4_flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_cwr, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_id, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_man, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_ack, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_sig, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_rst, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_syn, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_boolean(field_tree, hf_hicn_tcp_flags_fin, tvb, flags_offset, 1, pkt_hdr->v6.tcp.flags);
proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_ldr, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.ldr)), sizeof(pkt_hdr->v6.tcp.ldr), ENC_BIG_ENDIAN);
proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_csum, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.csum)), sizeof(pkt_hdr->v6.tcp.ldr), ENC_BIG_ENDIAN);
proto_item *ti_l4_lt = proto_tree_add_item(hicn_l4_tree, hf_hicn_tcp_lifetime, tvb, get_offset((uint8_t *) &(pkt_hdr->v6.tcp.lifetime)), sizeof(pkt_hdr->v6.tcp.ldr), ENC_BIG_ENDIAN);
proto_item_append_text(ti_l4_lt, " milliseconds");
dissector_handle_t data_handle = find_dissector("data");
call_dissector(data_handle, tvb_new_subset_remaining(tvb, HICN_V6_TCP_HDRLEN), pinfo, tree);
return tvb_captured_length(tvb);
}
static void
proto_register_hicn(void)
{
static hf_register_info hf[] = {
{ &hf_hicn_ipv6_src, { "Source Address", "hicn.l3.src", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_ipv6_src_data, { "Name Prefix", "hicn.l3.src", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_ipv6_dst, { "Destination Address", "hicn.l3.dst", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_ipv6_dst_interest, { "Name Prefix", "hicn.l3.dst", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_namesuffix, { "Name Suffix", "hicn.l4.namesuffix", FT_UINT32, BASE_HEX_DEC , NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_pathlabel, { "Path Label", "hicn.l4.pathlabel", FT_UINT8, BASE_HEX_DEC , NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_hdrlen_timescale, { "Header length and Timescale", "hicn.l4.hdrlen_ts", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_hdrlen, { "Header length", "hicn.l4.hdrlen", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_timescale, { "Timescale", "hicn.l4.timescale", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_flags, { "Flags", "hicn.l4.flags", FT_UINT8, BASE_HEX, NULL, FLAGS_MASK, NULL, HFILL }},
{ &hf_hicn_tcp_flags_cwr, { "_CWR", "hicn.l4.flags.cwr", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_CWR, NULL, HFILL }},
{ &hf_hicn_tcp_flags_id, { "ID", "hicn.l4.flags.id", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset),TH_ID, NULL, HFILL }},
{ &hf_hicn_tcp_flags_man, { "MAN", "hicn.l4.flags.man", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_MAN, NULL, HFILL }},
{ &hf_hicn_tcp_flags_ack, { "_ACK", "hicn.l4.flags.ack", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_ACK, NULL, HFILL }},
{ &hf_hicn_tcp_flags_sig, { "SIG", "hicn.l4.flags.sig", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_SIG, NULL, HFILL }},
{ &hf_hicn_tcp_flags_rst, { "_RST", "hicn.l4.flags.reset", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_RST, NULL, HFILL }},
{ &hf_hicn_tcp_flags_syn, { "_SYN", "hicn.l4.flags.syn", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_SYN, NULL, HFILL }},
{ &hf_hicn_tcp_flags_fin, { "_FIN", "hicn.l4.flags.fin", FT_BOOLEAN, FLAGS_BITS_LEN, TFS(&tfs_set_notset), TH_FIN, NULL, HFILL }},
{ &hf_hicn_tcp_ldr, { "Loss Detection and Recovery", "hicn.l4.ldr", FT_UINT16, BASE_HEX , NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_csum, { "Checksum", "hicn.l4.csum", FT_UINT16, BASE_HEX , NULL, 0x0, NULL, HFILL }},
{ &hf_hicn_tcp_lifetime, { "Lifetime", "hicn.l4.lifetime", FT_UINT16, BASE_DEC , NULL, 0x0, NULL, HFILL }}
};
static gint *ett[] = {
&ett_hicn,
&ett_hicn_l3,
&ett_hicn_l4,
&ett_hicn_l4_flags,
};
proto_hicn = proto_register_protocol ("Hybrid Information-Centric Networking Protocol", "HICN", "hicn");
proto_register_field_array(proto_hicn, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
static void
proto_reg_handoff_hicn(void)
{
static dissector_handle_t hicn_handle;
hicn_handle = create_dissector_handle(dissect_hicn, proto_hicn);
dissector_add_uint("udp.port", HICN_PORT, hicn_handle);
}
void plugin_register(void)
{
static proto_plugin plug_hicn;
plug_hicn.register_protoinfo = proto_register_hicn;
plug_hicn.register_handoff = proto_reg_handoff_hicn;
proto_register_plugin(&plug_hicn);
}
|
