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wireshark/ui/qt/models/packet_list_record.cpp

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/* 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-info.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>
QMap<int, int> PacketListRecord::cinfo_column_;
unsigned PacketListRecord::col_data_ver_ = 1;
unsigned PacketListRecord::rows_color_ver_ = 1;
PacketListRecord::PacketListRecord(frame_data *frameData) :
fdata_(frameData),
lines_(1),
line_count_changed_(false),
data_ver_(0),
color_ver_(0),
colorized_(false),
conv_index_(0),
read_failed_(false)
{
}
PacketListRecord::~PacketListRecord()
{
col_text_.clear();
}
void PacketListRecord::ensureColorized(capture_file *cap_file)
{
// packet_list_store.c:packet_list_get_value
Q_ASSERT(fdata_);
if (!cap_file) {
return;
}
//
// XXX - do we need to check whether the data versions match?
// If the record's color is already correct, we shouldn't need
// to redissect it to colorize it.
//
bool dissect_color = !colorized_ || ( color_ver_ != rows_color_ver_ );
if (data_ver_ != col_data_ver_ || dissect_color) {
dissect(cap_file, 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_ );
if (column >= col_text_.count() || col_text_.at(column).isNull() || data_ver_ != col_data_ver_ || dissect_color) {
dissect(cap_file, dissect_color);
}
return col_text_.at(column);
}
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_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 */
gboolean dissect_columns = col_text_.isEmpty() || data_ver_ != col_data_ver_;
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_;
}
data_ver_ = col_data_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);
}
//#define MINIMIZE_STRING_COPYING 1
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;
}
col_text_.clear();
lines_ = 1;
line_count_changed_ = false;
for (int column = 0; column < cinfo->num_cols; ++column) {
int col_lines = 1;
#ifdef MINIMIZE_STRING_COPYING
int text_col = cinfo_column_.value(column, -1);
/* Column based on frame_data or it already contains a value */
if (text_col < 0) {
col_fill_in_frame_data(fdata_, cinfo, column, FALSE);
col_text_ << QString(cinfo->columns[column].col_data);
continue;
}
switch (cinfo->col_fmt[column]) {
case COL_PROTOCOL:
case COL_INFO:
case COL_IF_DIR:
case COL_DCE_CALL:
case COL_8021Q_VLAN_ID:
case COL_EXPERT:
case COL_FREQ_CHAN:
if (cinfo->columns[column].col_data && cinfo->columns[column].col_data != cinfo->columns[column].col_buf) {
/* This is a constant string, so we don't have to copy it */
// XXX - ui/gtk/packet_list_store.c uses G_MAXUSHORT. We don't do proper UTF8
// truncation in either case.
int col_text_len = MIN(qstrlen(cinfo->col_data[column]) + 1, COL_MAX_INFO_LEN);
col_text_ << QString(QByteArray::fromRawData(cinfo->columns[column].col_data, col_text_len));
break;
}
/* !! FALL-THROUGH!! */
case COL_DEF_SRC:
case COL_RES_SRC: /* COL_DEF_SRC is currently just like COL_RES_SRC */
case COL_UNRES_SRC:
case COL_DEF_DL_SRC:
case COL_RES_DL_SRC:
case COL_UNRES_DL_SRC:
case COL_DEF_NET_SRC:
case COL_RES_NET_SRC:
case COL_UNRES_NET_SRC:
case COL_DEF_DST:
case COL_RES_DST: /* COL_DEF_DST is currently just like COL_RES_DST */
case COL_UNRES_DST:
case COL_DEF_DL_DST:
case COL_RES_DL_DST:
case COL_UNRES_DL_DST:
case COL_DEF_NET_DST:
case COL_RES_NET_DST:
case COL_UNRES_NET_DST:
default:
if (!get_column_resolved(column) && cinfo->col_expr.col_expr_val[column]) {
/* Use the unresolved value in col_expr_val */
// XXX Use QContiguousCache?
col_text_ << QString(cinfo->col_expr.col_expr_val[column]);
} else {
col_text_ << QString(cinfo->columns[column].col_data);
}
break;
}
#else // MINIMIZE_STRING_COPYING
QString col_str;
if (!get_column_resolved(column) && cinfo->col_expr.col_expr_val[column]) {
/* Use the unresolved value in col_expr_val */
col_str = QString(cinfo->col_expr.col_expr_val[column]);
} else {
int text_col = cinfo_column_.value(column, -1);
if (text_col < 0) {
col_fill_in_frame_data(fdata_, cinfo, column, FALSE);
}
col_str = QString(cinfo->columns[column].col_data);
}
col_text_ << col_str;
col_lines = col_str.count('\n');
if (col_lines > lines_) {
lines_ = col_lines;
line_count_changed_ = true;
}
#endif // MINIMIZE_STRING_COPYING
}
}
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