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
246
|
/* packet_list_record.cpp
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "packet_list_record.h"
#include <file.h>
#include <epan/epan_dissect.h>
#include <epan/column.h>
#include <epan/conversation.h>
#include <epan/wmem_scopes.h>
#include <epan/color_filters.h>
#include "frame_tvbuff.h"
#include <ui/qt/utils/qt_ui_utils.h>
#include <QStringList>
QCache<guint32, QStringList> PacketListRecord::col_text_cache_(500);
QMap<int, int> PacketListRecord::cinfo_column_;
unsigned PacketListRecord::rows_color_ver_ = 1;
PacketListRecord::PacketListRecord(frame_data *frameData) :
fdata_(frameData),
lines_(1),
line_count_changed_(false),
color_ver_(0),
colorized_(false),
conv_index_(0),
read_failed_(false)
{
}
PacketListRecord::~PacketListRecord()
{
}
void PacketListRecord::ensureColorized(capture_file *cap_file)
{
// packet_list_store.c:packet_list_get_value
Q_ASSERT(fdata_);
if (!cap_file) {
return;
}
bool dissect_color = !colorized_ || ( color_ver_ != rows_color_ver_ );
if (dissect_color) {
/* Dissect columns only if it won't evict anything from cache */
bool dissect_columns = col_text_cache_.totalCost() < col_text_cache_.maxCost();
dissect(cap_file, dissect_columns, dissect_color);
}
}
// We might want to return a const char * instead. This would keep us from
// creating excessive QByteArrays, e.g. in PacketListModel::recordLessThan.
const QString PacketListRecord::columnString(capture_file *cap_file, int column, bool colorized)
{
// packet_list_store.c:packet_list_get_value
Q_ASSERT(fdata_);
if (!cap_file || column < 0 || column >= cap_file->cinfo.num_cols) {
return QString();
}
//
// XXX - do we still need to check the colorization, given that we now
// have the ensureColorized() method to ensure that the record is
// properly colorized?
//
bool dissect_color = ( colorized && !colorized_ ) || ( color_ver_ != rows_color_ver_ );
QStringList *col_text = nullptr;
if (!dissect_color) {
col_text = col_text_cache_.object(fdata_->num);
}
if (col_text == nullptr || column >= col_text->count() || col_text->at(column).isNull()) {
dissect(cap_file, true, dissect_color);
col_text = col_text_cache_.object(fdata_->num);
}
return col_text ? col_text->at(column) : QString();
}
void PacketListRecord::resetColumns(column_info *cinfo)
{
invalidateAllRecords();
if (!cinfo) {
return;
}
cinfo_column_.clear();
int i, j;
for (i = 0, j = 0; i < cinfo->num_cols; i++) {
if (!col_based_on_frame_data(cinfo, i)) {
cinfo_column_[i] = j;
j++;
}
}
}
void PacketListRecord::dissect(capture_file *cap_file, bool dissect_columns, bool dissect_color)
{
// packet_list_store.c:packet_list_dissect_and_cache_record
epan_dissect_t edt;
column_info *cinfo = NULL;
gboolean create_proto_tree;
wtap_rec rec; /* Record metadata */
Buffer buf; /* Record data */
if (!cap_file) {
return;
}
if (dissect_columns) {
cinfo = &cap_file->cinfo;
}
wtap_rec_init(&rec);
ws_buffer_init(&buf, 1514);
if (read_failed_) {
read_failed_ = !cf_read_record_no_alert(cap_file, fdata_, &rec, &buf);
} else {
read_failed_ = !cf_read_record(cap_file, fdata_, &rec, &buf);
}
if (read_failed_) {
/*
* Error reading the record.
*
* Don't set the color filter for now (we might want
* to colorize it in some fashion to warn that the
* row couldn't be filled in or colorized), and
* set the columns to placeholder values, except
* for the Info column, where we'll put in an
* error message.
*/
if (dissect_columns) {
col_fill_in_error(cinfo, fdata_, FALSE, FALSE /* fill_fd_columns */);
cacheColumnStrings(cinfo);
}
if (dissect_color) {
fdata_->color_filter = NULL;
colorized_ = true;
}
ws_buffer_free(&buf);
wtap_rec_cleanup(&rec);
return; /* error reading the record */
}
/*
* Determine whether we need to create a protocol tree.
* We do if:
*
* we're going to apply a color filter to this packet;
*
* we're need to fill in the columns and we have custom columns
* (which require field values, which currently requires that
* we build a protocol tree).
*
* XXX - field extractors? (Not done for GTK+....)
*/
create_proto_tree = ((dissect_color && color_filters_used()) ||
(dissect_columns && (have_custom_cols(cinfo) ||
have_field_extractors())));
epan_dissect_init(&edt, cap_file->epan,
create_proto_tree,
FALSE /* proto_tree_visible */);
/* Re-color when the coloring rules are changed via the UI. */
if (dissect_color) {
color_filters_prime_edt(&edt);
fdata_->need_colorize = 1;
}
if (dissect_columns)
col_custom_prime_edt(&edt, cinfo);
/*
* XXX - need to catch an OutOfMemoryError exception and
* attempt to recover from it.
*/
epan_dissect_run(&edt, cap_file->cd_t, &rec,
frame_tvbuff_new_buffer(&cap_file->provider, fdata_, &buf),
fdata_, cinfo);
if (dissect_columns) {
/* "Stringify" non frame_data vals */
epan_dissect_fill_in_columns(&edt, FALSE, FALSE /* fill_fd_columns */);
cacheColumnStrings(cinfo);
}
if (dissect_color) {
colorized_ = true;
color_ver_ = rows_color_ver_;
}
struct conversation * conv = find_conversation_pinfo(&edt.pi, 0);
conv_index_ = ! conv ? 0 : conv->conv_index;
epan_dissect_cleanup(&edt);
ws_buffer_free(&buf);
wtap_rec_cleanup(&rec);
}
void PacketListRecord::cacheColumnStrings(column_info *cinfo)
{
// packet_list_store.c:packet_list_change_record(PacketList *packet_list, PacketListRecord *record, gint col, column_info *cinfo)
if (!cinfo) {
return;
}
QStringList *col_text = new QStringList();
lines_ = 1;
line_count_changed_ = false;
for (int column = 0; column < cinfo->num_cols; ++column) {
int col_lines = 1;
QString col_str;
int text_col = cinfo_column_.value(column, -1);
if (text_col < 0) {
col_fill_in_frame_data(fdata_, cinfo, column, FALSE);
}
col_str = QString(get_column_text(cinfo, column));
*col_text << col_str;
col_lines = static_cast<int>(col_str.count('\n'));
if (col_lines > lines_) {
lines_ = col_lines;
line_count_changed_ = true;
}
}
col_text_cache_.insert(fdata_->num, col_text);
}
|