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
|
/*
* Dissector for ZPU packets (communication with X300 firmware)
*
* Copyright 2013-2014 Ettus Research LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* Format of ZPU packets is defined in x300_fw_commons.h,
* x300_fw_comms_t.
*
* Reminder:
*
* uint32_t flags; (ack, error, peek, poke)
* uint32_t sequence;
* uint32_t addr;
* uint32_t data;
*/
#include "config.h"
#include <glib.h>
#include <epan/packet.h>
#include <ctype.h>
#include <stdio.h>
#include <endian.h>
#include "../../host/lib/usrp/x300/x300_fw_common.h"
#include "zpu_addr_names.h"
#define LOG_HEADER "[ZPU] "
#ifndef min
#define min(a,b) ((a<b)?a:b)
#endif // min
const unsigned int FW_PORT = X300_FW_COMMS_UDP_PORT;
static int proto_zpu = -1;
static int hf_zpu_flags = -1;
static int hf_zpu_flags_ack = -1;
static int hf_zpu_flags_error = -1;
static int hf_zpu_flags_poke = -1;
static int hf_zpu_flags_peek = -1;
static int hf_zpu_seq = -1;
static int hf_zpu_addr = -1;
static int hf_zpu_data = -1;
static int hf_zpu_shmem_addr = -1;
static int hf_zpu_shmem_addr_name = -1;
/* Subtree handles: set by register_subtree_array */
static gint ett_zpu = -1;
static gint ett_zpu_flags = -1;
//static gint ett_zpu_shmem = -1;
/* Forward-declare the dissector functions */
void proto_register_zpu(void);
void proto_reg_handoff_zpu(void);
static void dissect_zpu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
/* The dissector itself */
static void dissect_zpu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *item;
proto_tree *zpu_tree;
proto_item *flags_item;
proto_tree *flags_tree;
gint len;
gboolean is_network;
gint endianness;
if (pinfo->match_uint == FW_PORT) {
is_network = TRUE;
endianness = ENC_BIG_ENDIAN;
}
else {
is_network = FALSE;
endianness = ENC_LITTLE_ENDIAN;
}
len = tvb_reported_length(tvb);
col_append_str(pinfo->cinfo, COL_PROTOCOL, "/ZPU");
/*col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "ZPU", tvb_format_text_wsp(tvb, 0, len));*/
col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "ZPU");
if (tree)
{
item = proto_tree_add_item(tree, proto_zpu, tvb, 0, min(16, len), ENC_NA);
// Dissect 'flags'
if (len >= 4)
{
zpu_tree = proto_item_add_subtree(item, ett_zpu);
flags_item = proto_tree_add_item(zpu_tree, hf_zpu_flags, tvb, 0, 4, endianness);
flags_tree = proto_item_add_subtree(flags_item, ett_zpu_flags);
proto_tree_add_item(flags_tree, hf_zpu_flags_ack, tvb, 0, 4, ENC_NA);
proto_tree_add_item(flags_tree, hf_zpu_flags_error, tvb, 0, 4, ENC_NA);
proto_tree_add_item(flags_tree, hf_zpu_flags_poke, tvb, 0, 4, ENC_NA);
proto_tree_add_item(flags_tree, hf_zpu_flags_peek, tvb, 0, 4, ENC_NA);
// Dissect 'sequence number'
if (len >= 8)
{
proto_tree_add_item(zpu_tree, hf_zpu_seq, tvb, 4, 4, ENC_NA);
// Dissect 'address'
if (len >= 12)
{
proto_tree_add_item(zpu_tree, hf_zpu_addr, tvb, 8, 4, ENC_NA);
guint8 *bytes = tvb_get_string(tvb, 8, 4);
unsigned int addr = 0;
memcpy(&addr, bytes, 4);
/* TODO proper endianness handling */
addr = (addr >> 24) | ((addr & 0x00FF0000) >> 8) | ((addr & 0x0000FF00) << 8) | ((addr & 0x000000FF) << 24);
/* TODO check the actual size of shmem instead of this constant */
if (addr >= X300_FW_SHMEM_BASE && addr <= X300_FW_SHMEM_BASE + 0x2000)
{
proto_item *shmem_addr_item = NULL;
// Convert the address to a register number (32-bit registers == 4-byte registers)
addr -= X300_FW_SHMEM_BASE;
addr /= 4;
shmem_addr_item = proto_tree_add_uint(zpu_tree, hf_zpu_shmem_addr, tvb, 8, 4, addr);
proto_item_append_text(shmem_addr_item, ", Register name: %s",
val_to_str(addr, X300_SHMEM_NAMES, "Unknown (0x%04x)")
);
}
// Dissect 'data'
if (len >= 16)
{
proto_tree_add_item(zpu_tree, hf_zpu_data, tvb, 12, 4, ENC_NA);
}
}
}
}
}
}
void proto_register_zpu(void)
{
static hf_register_info hf[] = {
{ &hf_zpu_flags,
{ "Flags", "zpu.flags",
FT_UINT32, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_zpu_flags_ack,
{ "ACK", "zpu.flags.ack",
FT_BOOLEAN, BASE_NONE,
NULL, 0x1,
NULL, HFILL }
},
{ &hf_zpu_flags_error,
{ "Error", "zpu.flags.error",
FT_BOOLEAN, BASE_NONE,
NULL, 0x2,
NULL, HFILL }
},
{ &hf_zpu_flags_poke,
{ "Poke", "zpu.flags.poke",
FT_BOOLEAN, BASE_NONE,
NULL, 0x4,
NULL, HFILL }
},
{ &hf_zpu_flags_peek,
{ "Peek", "zpu.flags.peek",
FT_BOOLEAN, BASE_NONE,
NULL, 0x8,
NULL, HFILL }
},
{ &hf_zpu_seq,
{ "Sequence ID", "zpu.seq",
FT_UINT32, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_zpu_addr,
{ "Address", "zpu.addr",
FT_UINT32, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_zpu_shmem_addr,
{ "SHMEM section", "zpu.shmem",
FT_UINT32, BASE_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_zpu_data,
{ "Data", "zpu.data",
FT_UINT32, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
};
static gint *ett[] = {
&ett_zpu,
&ett_zpu_flags,
//&ett_zpu_shmem
};
proto_zpu = proto_register_protocol("ZPU FW", "ZPU", "zpu");
proto_register_field_array(proto_zpu, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("zpu", dissect_zpu, proto_zpu);
}
/* Handler registration */
void proto_reg_handoff_zpu(void)
{
/* register dissector for UDP packets */
static dissector_handle_t zpu_handle;
zpu_handle = create_dissector_handle(dissect_zpu, proto_zpu);
dissector_add_uint("udp.port", FW_PORT, zpu_handle);
}
|
