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/* file.c
* File I/O routines
*
* 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>
#define WS_LOG_DOMAIN LOG_DOMAIN_CAPTURE
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <wsutil/file_util.h>
#include <wsutil/filesystem.h>
#include <wsutil/json_dumper.h>
#include <wsutil/wslog.h>
#include <wsutil/ws_assert.h>
#include <wsutil/version_info.h>
#include <wiretap/merge.h>
#include <epan/exceptions.h>
#include <epan/epan.h>
#include <epan/column.h>
#include <epan/packet.h>
#include <epan/column-utils.h>
#include <epan/expert.h>
#include <epan/prefs.h>
#include <epan/dfilter/dfilter.h>
#include <epan/epan_dissect.h>
#include <epan/tap.h>
#include <epan/timestamp.h>
#include <epan/strutil.h>
#include <epan/addr_resolv.h>
#include <epan/color_filters.h>
#include <epan/secrets.h>
#include "cfile.h"
#include "file.h"
#include "fileset.h"
#include "frame_tvbuff.h"
#include "ui/alert_box.h"
#include "ui/simple_dialog.h"
#include "ui/main_statusbar.h"
#include "ui/progress_dlg.h"
#include "ui/urls.h"
#include "ui/ws_ui_util.h"
#include "ui/packet_list_utils.h"
/* Needed for addrinfo */
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef _WIN32
# include <winsock2.h>
# include <ws2tcpip.h>
#endif
static gboolean read_record(capture_file *cf, wtap_rec *rec, Buffer *buf,
dfilter_t *dfcode, epan_dissect_t *edt, column_info *cinfo, gint64 offset,
fifo_string_cache_t *frame_dup_cache, GChecksum *frame_cksum);
static void rescan_packets(capture_file *cf, const char *action, const char *action_item, gboolean redissect);
typedef enum {
MR_NOTMATCHED,
MR_MATCHED,
MR_ERROR
} match_result;
typedef match_result (*ws_match_function)(capture_file *, frame_data *,
wtap_rec *, Buffer *, void *);
static match_result match_protocol_tree(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static void match_subtree_text(proto_node *node, gpointer data);
static void match_subtree_text_reverse(proto_node *node, gpointer data);
static match_result match_summary_line(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_narrow_and_wide(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_narrow_and_wide_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_narrow_and_wide_case(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_narrow_and_wide_case_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_narrow_case(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_narrow_case_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_wide(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_wide_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_wide_case(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_wide_case_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_binary(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_binary_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_regex(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_regex_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_dfilter(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_marked(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static match_result match_time_reference(capture_file *cf, frame_data *fdata,
wtap_rec *, Buffer *, void *criterion);
static gboolean find_packet(capture_file *cf, ws_match_function match_function,
void *criterion, search_direction dir);
static void cf_rename_failure_alert_box(const char *filename, int err);
/* Seconds spent processing packets between pushing UI updates. */
#define PROGBAR_UPDATE_INTERVAL 0.150
/* Show the progress bar after this many seconds. */
#define PROGBAR_SHOW_DELAY 0.5
/*
* Maximum number of records we support in a file.
*
* It is, at most, the maximum value of a guint32, as we use a guint32
* for the frame number.
*
* We allow it to be set to a lower value; see issue #16908 for why
* we're doing this. Thanks, Qt!
*/
static guint32 max_records = G_MAXUINT32;
void
cf_set_max_records(guint max_records_arg)
{
max_records = max_records_arg;
}
/*
* We could probably use g_signal_...() instead of the callbacks below but that
* would require linking our CLI programs to libgobject and creating an object
* instance for the signals.
*/
typedef struct {
cf_callback_t cb_fct;
gpointer user_data;
} cf_callback_data_t;
static GList *cf_callbacks = NULL;
static void
cf_callback_invoke(int event, gpointer data)
{
cf_callback_data_t *cb;
GList *cb_item = cf_callbacks;
/* there should be at least one interested */
ws_assert(cb_item != NULL);
while (cb_item != NULL) {
cb = (cf_callback_data_t *)cb_item->data;
cb->cb_fct(event, data, cb->user_data);
cb_item = g_list_next(cb_item);
}
}
void
cf_callback_add(cf_callback_t func, gpointer user_data)
{
cf_callback_data_t *cb;
cb = g_new(cf_callback_data_t,1);
cb->cb_fct = func;
cb->user_data = user_data;
cf_callbacks = g_list_prepend(cf_callbacks, cb);
}
void
cf_callback_remove(cf_callback_t func, gpointer user_data)
{
cf_callback_data_t *cb;
GList *cb_item = cf_callbacks;
while (cb_item != NULL) {
cb = (cf_callback_data_t *)cb_item->data;
if (cb->cb_fct == func && cb->user_data == user_data) {
cf_callbacks = g_list_remove(cf_callbacks, cb);
g_free(cb);
return;
}
cb_item = g_list_next(cb_item);
}
ws_assert_not_reached();
}
gulong
cf_get_computed_elapsed(capture_file *cf)
{
return cf->computed_elapsed;
}
static void
compute_elapsed(capture_file *cf, gint64 start_time)
{
gint64 delta_time = g_get_monotonic_time() - start_time;
cf->computed_elapsed = (gulong) (delta_time / 1000); /* ms */
}
static epan_t *
ws_epan_new(capture_file *cf)
{
static const struct packet_provider_funcs funcs = {
cap_file_provider_get_frame_ts,
cap_file_provider_get_interface_name,
cap_file_provider_get_interface_description,
cap_file_provider_get_modified_block
};
return epan_new(&cf->provider, &funcs);
}
cf_status_t
cf_open(capture_file *cf, const char *fname, unsigned int type, gboolean is_tempfile, int *err)
{
wtap *wth;
gchar *err_info;
wth = wtap_open_offline(fname, type, err, &err_info, TRUE);
if (wth == NULL)
goto fail;
/* The open succeeded. Close whatever capture file we had open,
and fill in the information for this file. */
cf_close(cf);
/* Initialize the record metadata. */
wtap_rec_init(&cf->rec);
/* XXX - we really want to initialize this after we've read all
the packets, so we know how much we'll ultimately need. */
ws_buffer_init(&cf->buf, 1514);
/* We're about to start reading the file. */
cf->state = FILE_READ_IN_PROGRESS;
cf->provider.wth = wth;
cf->f_datalen = 0;
/* Set the file name because we need it to set the follow stream filter.
XXX - is that still true? We need it for other reasons, though,
in any case. */
cf->filename = g_strdup(fname);
/* Indicate whether it's a permanent or temporary file. */
cf->is_tempfile = is_tempfile;
/* No user changes yet. */
cf->unsaved_changes = FALSE;
cf->computed_elapsed = 0;
cf->cd_t = wtap_file_type_subtype(cf->provider.wth);
cf->open_type = type;
cf->linktypes = g_array_sized_new(FALSE, FALSE, (guint) sizeof(int), 1);
cf->count = 0;
cf->packet_comment_count = 0;
cf->displayed_count = 0;
cf->marked_count = 0;
cf->ignored_count = 0;
cf->ref_time_count = 0;
cf->drops_known = FALSE;
cf->drops = 0;
cf->snap = wtap_snapshot_length(cf->provider.wth);
/* Allocate a frame_data_sequence for the frames in this file */
cf->provider.frames = new_frame_data_sequence();
nstime_set_zero(&cf->elapsed_time);
cf->provider.ref = NULL;
cf->provider.prev_dis = NULL;
cf->provider.prev_cap = NULL;
cf->cum_bytes = 0;
/* Create new epan session for dissection.
* (The old one was freed in cf_close().)
*/
cf->epan = ws_epan_new(cf);
packet_list_queue_draw();
cf_callback_invoke(cf_cb_file_opened, cf);
wtap_set_cb_new_ipv4(cf->provider.wth, add_ipv4_name);
wtap_set_cb_new_ipv6(cf->provider.wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
wtap_set_cb_new_secrets(cf->provider.wth, secrets_wtap_callback);
return CF_OK;
fail:
cfile_open_failure_alert_box(fname, *err, err_info);
return CF_ERROR;
}
/*
* Add an encapsulation type to cf->linktypes.
*/
static void
cf_add_encapsulation_type(capture_file *cf, int encap)
{
guint i;
for (i = 0; i < cf->linktypes->len; i++) {
if (g_array_index(cf->linktypes, gint, i) == encap)
return; /* it's already there */
}
/* It's not already there - add it. */
g_array_append_val(cf->linktypes, encap);
}
/* Reset everything to a pristine state */
void
cf_close(capture_file *cf)
{
cf->stop_flag = FALSE;
if (cf->state == FILE_CLOSED || cf->state == FILE_READ_PENDING)
return; /* Nothing to do */
/* Die if we're in the middle of reading a file. */
ws_assert(cf->state != FILE_READ_IN_PROGRESS);
ws_assert(!cf->read_lock);
cf_callback_invoke(cf_cb_file_closing, cf);
/* close things, if not already closed before */
color_filters_cleanup();
if (cf->provider.wth) {
wtap_close(cf->provider.wth);
cf->provider.wth = NULL;
}
/* We have no file open... */
if (cf->filename != NULL) {
/* If it's a temporary file, remove it. */
if (cf->is_tempfile)
ws_unlink(cf->filename);
g_free(cf->filename);
cf->filename = NULL;
}
/* ...which means we have no changes to that file to save. */
cf->unsaved_changes = FALSE;
/* no open_routine type */
cf->open_type = WTAP_TYPE_AUTO;
/* Clean up the record metadata. */
wtap_rec_cleanup(&cf->rec);
/* Clear the packet list. */
packet_list_freeze();
packet_list_clear();
packet_list_thaw();
/* Free up the packet buffer. */
ws_buffer_free(&cf->buf);
dfilter_free(cf->rfcode);
cf->rfcode = NULL;
if (cf->provider.frames != NULL) {
free_frame_data_sequence(cf->provider.frames);
cf->provider.frames = NULL;
}
if (cf->provider.frames_modified_blocks) {
g_tree_destroy(cf->provider.frames_modified_blocks);
cf->provider.frames_modified_blocks = NULL;
}
cf_unselect_packet(cf); /* nothing to select */
cf->first_displayed = 0;
cf->last_displayed = 0;
/* No frames, no frame selected, no field in that frame selected. */
cf->count = 0;
cf->current_frame = NULL;
cf->finfo_selected = NULL;
/* No frame link-layer types, either. */
if (cf->linktypes != NULL) {
g_array_free(cf->linktypes, TRUE);
cf->linktypes = NULL;
}
cf->f_datalen = 0;
nstime_set_zero(&cf->elapsed_time);
reset_tap_listeners();
epan_free(cf->epan);
cf->epan = NULL;
/* We have no file open. */
cf->state = FILE_CLOSED;
cf_callback_invoke(cf_cb_file_closed, cf);
}
/*
* TRUE if the progress dialog doesn't exist and it looks like we'll
* take > PROGBAR_SHOW_DELAY (500ms) to load, FALSE otherwise.
*/
static inline gboolean
progress_is_slow(progdlg_t *progdlg, GTimer *prog_timer, gint64 size, gint64 pos)
{
double elapsed;
if (progdlg) return FALSE;
elapsed = g_timer_elapsed(prog_timer, NULL);
/* This only gets checked between reading records, which doesn't help if
* a single record takes a very long time, e.g., the first TLS packet if
* the SSLKEYLOGFILE is very large. (#17051) */
if ((elapsed * 2 > PROGBAR_SHOW_DELAY && (size / pos) >= 2) /* It looks like we're going to be slow. */
|| elapsed > PROGBAR_SHOW_DELAY) { /* We are indeed slow. */
return TRUE;
}
return FALSE;
}
static float
calc_progbar_val(capture_file *cf, gint64 size, gint64 file_pos, gchar *status_str, gulong status_size)
{
float progbar_val;
progbar_val = (gfloat) file_pos / (gfloat) size;
if (progbar_val > 1.0) {
/* The file probably grew while we were reading it.
* Update file size, and try again.
*/
size = wtap_file_size(cf->provider.wth, NULL);
if (size >= 0)
progbar_val = (gfloat) file_pos / (gfloat) size;
/* If it's still > 1, either "wtap_file_size()" failed (in which
* case there's not much we can do about it), or the file
* *shrank* (in which case there's not much we can do about
* it); just clip the progress value at 1.0.
*/
if (progbar_val > 1.0f)
progbar_val = 1.0f;
}
snprintf(status_str, status_size,
"%" PRId64 "KB of %" PRId64 "KB",
file_pos / 1024, size / 1024);
return progbar_val;
}
cf_read_status_t
cf_read(capture_file *cf, gboolean reloading)
{
int err = 0;
gchar *err_info = NULL;
volatile gboolean too_many_records = FALSE;
gchar *name_ptr;
progdlg_t *volatile progbar = NULL;
GTimer *prog_timer = g_timer_new();
gint64 size;
gint64 start_time;
epan_dissect_t edt;
wtap_rec rec;
Buffer buf;
dfilter_t *dfcode = NULL;
column_info *cinfo;
volatile gboolean create_proto_tree;
guint tap_flags;
gboolean compiled _U_;
volatile gboolean is_read_aborted = FALSE;
/* The update_progress_dlg call below might end up accepting a user request to
* trigger redissection/rescans which can modify/destroy the dissection
* context ("cf->epan"). That condition should be prevented by callers, but in
* case it occurs let's fail gracefully.
*/
if (cf->read_lock) {
ws_warning("Failing due to recursive cf_read(\"%s\", %d) call!",
cf->filename, reloading);
return CF_READ_ERROR;
}
cf->read_lock = TRUE;
/* Compile the current display filter.
* The code it compiles to might have changed, e.g. if a display
* filter macro used has changed.
*
* We assume this will not fail since cf->dfilter is only set in
* cf_filter IFF the filter was valid.
* XXX - This is not necessarily true, if the filter has a FT_IPv4
* or FT_IPv6 field compared to a resolved hostname in it, because
* we do a new host lookup, and that *could* timeout this time
* (though with the read lock above we shouldn't have many lookups at
* once, reducing the chances of that)... (#19612)
*/
if (cf->dfilter) {
compiled = dfilter_compile(cf->dfilter, &dfcode, NULL);
ws_assert(compiled && dfcode);
}
dfilter_free(cf->dfcode);
cf->dfcode = dfcode;
/* The compiled dfilter might have a field reference; recompiling it
* means that the field references won't match anything. That's what
* we want since this is a new sequential read and we don't have
* a selected frame with a tree. (Will taps with filters with display
* references also have cleared display references?)
*/
/* Get the union of the flags for all tap listeners. */
tap_flags = union_of_tap_listener_flags();
/*
* Determine whether we need to create a protocol tree.
* We do if:
*
* we're going to apply a display filter;
*
* one of the tap listeners is going to apply a filter;
*
* one of the tap listeners requires a protocol tree;
*
* a postdissector wants field values or protocols on
* the first pass.
*/
create_proto_tree =
(cf->dfcode != NULL || have_filtering_tap_listeners() ||
(tap_flags & TL_REQUIRES_PROTO_TREE) || postdissectors_want_hfids());
reset_tap_listeners();
name_ptr = g_filename_display_basename(cf->filename);
if (reloading)
cf_callback_invoke(cf_cb_file_reload_started, cf);
else
cf_callback_invoke(cf_cb_file_read_started, cf);
/* Record the file's compression type.
XXX - do we know this at open time? */
cf->compression_type = wtap_get_compression_type(cf->provider.wth);
/* The packet list window will be empty until the file is completely loaded */
packet_list_freeze();
cf->stop_flag = FALSE;
start_time = g_get_monotonic_time();
epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
/* If the display filter or any tap listeners require the columns,
* construct them. */
cinfo = (tap_listeners_require_columns() ||
dfilter_requires_columns(cf->dfcode)) ? &cf->cinfo : NULL;
/* Find the size of the file. */
size = wtap_file_size(cf->provider.wth, NULL);
/* If we are to ignore duplicate frames, we need a container to store
* hashes frame contents */
fifo_string_cache_t frame_dup_cache;
GChecksum *volatile cksum = NULL;
if (prefs.ignore_dup_frames) {
fifo_string_cache_init(&frame_dup_cache, prefs.ignore_dup_frames_cache_entries, g_free);
cksum = g_checksum_new(G_CHECKSUM_SHA256);
}
g_timer_start(prog_timer);
wtap_rec_init(&rec);
ws_buffer_init(&buf, 1514);
TRY {
gint64 file_pos;
gint64 data_offset;
float progbar_val;
gchar status_str[100];
while ((wtap_read(cf->provider.wth, &rec, &buf, &err, &err_info,
&data_offset))) {
if (size >= 0) {
if (cf->count == max_records) {
/*
* Quit if we've already read the maximum number of
* records allowed.
*/
too_many_records = TRUE;
break;
}
file_pos = wtap_read_so_far(cf->provider.wth);
/* Create the progress bar if necessary. */
if (progress_is_slow(progbar, prog_timer, size, file_pos)) {
progbar_val = calc_progbar_val(cf, size, file_pos, status_str, sizeof(status_str));
progbar = delayed_create_progress_dlg(cf->window, NULL, NULL, TRUE,
&cf->stop_flag, progbar_val);
}
/*
* Update the progress bar, but do it only after
* PROGBAR_UPDATE_INTERVAL has elapsed. Calling update_progress_dlg
* and packets_bar_update will likely trigger UI paint events, which
* might take a while depending on the platform and display. Reset
* our timer *after* painting.
*/
if (progbar && g_timer_elapsed(prog_timer, NULL) > PROGBAR_UPDATE_INTERVAL) {
progbar_val = calc_progbar_val(cf, size, file_pos, status_str, sizeof(status_str));
/* update the packet bar content on the first run or frequently on very large files */
update_progress_dlg(progbar, progbar_val, status_str);
compute_elapsed(cf, start_time);
packets_bar_update();
g_timer_start(prog_timer);
}
/*
* The previous GUI triggers should not have destroyed the running
* session. If that did happen, it could blow up when read_record tries
* to use the destroyed edt.session, so detect it right here.
*/
ws_assert(edt.session == cf->epan);
}
if (cf->state == FILE_READ_ABORTED) {
/* Well, the user decided to exit Wireshark. Break out of the
loop, and let the code below (which is called even if there
aren't any packets left to read) exit. */
is_read_aborted = TRUE;
break;
}
if (cf->stop_flag) {
/* Well, the user decided to abort the read. He/She will be warned and
it might be enough for him/her to work with the already loaded
packets.
This is especially true for very large capture files, where you don't
want to wait loading the whole file (which may last minutes or even
hours even on fast machines) just to see that it was the wrong file. */
break;
}
read_record(cf, &rec, &buf, cf->dfcode, &edt, cinfo, data_offset, &frame_dup_cache, cksum);
wtap_rec_reset(&rec);
}
}
CATCH(OutOfMemoryError) {
simple_message_box(ESD_TYPE_ERROR, NULL,
"More information and workarounds can be found at\n"
WS_WIKI_URL("KnownBugs/OutOfMemory"),
"Sorry, but Wireshark has run out of memory and has to terminate now.");
#if 0
/* Could we close the current capture and free up memory from that? */
#else
/* we have to terminate, as we cannot recover from the memory error */
exit(1);
#endif
}
ENDTRY;
// If we're ignoring duplicate frames, clear the data structures.
// We really could look at prefs.ignore_dup_frames here, but it's even
// safer to check if we had allocated 'cksum'.
if (cksum != NULL) {
fifo_string_cache_free(&frame_dup_cache);
g_checksum_free(cksum);
}
/* We're done reading sequentially through the file. */
cf->state = FILE_READ_DONE;
/* Destroy the progress bar if it was created. */
if (progbar != NULL)
destroy_progress_dlg(progbar);
g_timer_destroy(prog_timer);
/* Free the display name */
g_free(name_ptr);
epan_dissect_cleanup(&edt);
wtap_rec_cleanup(&rec);
ws_buffer_free(&buf);
/* Close the sequential I/O side, to free up memory it requires. */
wtap_sequential_close(cf->provider.wth);
/* Allow the protocol dissectors to free up memory that they
* don't need after the sequential run-through of the packets. */
postseq_cleanup_all_protocols();
/* compute the time it took to load the file */
compute_elapsed(cf, start_time);
/* Set the file encapsulation type now; we don't know what it is until
we've looked at all the packets, as we don't know until then whether
there's more than one type (and thus whether it's
WTAP_ENCAP_PER_PACKET). */
cf->lnk_t = wtap_file_encap(cf->provider.wth);
cf->current_frame = frame_data_sequence_find(cf->provider.frames, cf->first_displayed);
packet_list_thaw();
/* It is safe again to execute redissections or sort. */
ws_assert(cf->read_lock);
cf->read_lock = FALSE;
if (reloading)
cf_callback_invoke(cf_cb_file_reload_finished, cf);
else
cf_callback_invoke(cf_cb_file_read_finished, cf);
/* If we have any displayed packets to select, select the first of those
packets by making the first row the selected row. */
if (cf->first_displayed != 0) {
packet_list_select_row_from_data(NULL);
}
if (is_read_aborted) {
/*
* Well, the user decided to exit Wireshark while reading this *offline*
* capture file (Live captures are handled by something like
* cf_continue_tail). Clean up accordingly.
*/
cf_close(cf);
cf->redissection_queued = RESCAN_NONE;
return CF_READ_ABORTED;
}
if (cf->redissection_queued != RESCAN_NONE) {
/* Redissection was queued up. Clear the request and perform it now. */
gboolean redissect = cf->redissection_queued == RESCAN_REDISSECT;
rescan_packets(cf, NULL, NULL, redissect);
}
if (cf->stop_flag) {
simple_message_box(ESD_TYPE_WARN, NULL,
"The remaining packets in the file were discarded.\n"
"\n"
"As a lot of packets from the original file will be missing,\n"
"remember to be careful when saving the current content to a file.\n",
"File loading was cancelled.");
return CF_READ_ERROR;
}
if (err != 0) {
/* Put up a message box noting that the read failed somewhere along
the line. Don't throw out the stuff we managed to read, though,
if any. */
cfile_read_failure_alert_box(NULL, err, err_info);
return CF_READ_ERROR;
} else if (too_many_records) {
simple_message_box(ESD_TYPE_WARN, NULL,
"The remaining packets in the file were discarded.\n"
"\n"
"As a lot of packets from the original file will be missing,\n"
"remember to be careful when saving the current content to a file.\n"
"\n"
"The command-line utility editcap can be used to split "
"the file into multiple smaller files",
"The file contains more records than the maximum "
"supported number of records, %u.", max_records);
return CF_READ_ERROR;
} else
return CF_READ_OK;
}
#ifdef HAVE_LIBPCAP
cf_read_status_t
cf_continue_tail(capture_file *cf, volatile int to_read, wtap_rec *rec,
Buffer *buf, int *err, fifo_string_cache_t *frame_dup_cache, GChecksum *frame_cksum)
{
gchar *err_info;
volatile int newly_displayed_packets = 0;
epan_dissect_t edt;
gboolean create_proto_tree;
guint tap_flags;
/* Don't compile the current display filter. The current display filter
* text might compile to different code than when the capture started:
*
* If it has a IP address resolved name, calling get_host_ipaddr every
* time new packets arrive can mean a *lot* of gethostbyname calls
* in flight at once, eventually leading to a timeout (#19612).
* addr_resolv.c says that ares_gethostbyname is "usually interactive",
* unlike ares_gethostbyaddr (used in dissection), and violating that
* expectation is bad.
*
* If it has a display filter macro, the definition might have changed.
*
* If it has a field reference, the selected frame / current proto tree
* might have changed, and we don't have the old one. If we recompile,
* we can't set the field references to the old values.
*
* For a rescan, redissection, reload, retap, or opening a new file, we
* want to compile. What about here, when new frames have arrived in a live
* capture? We might be able to cache the host lookup, and a user might want
* the new display filter macro definition, but the user almost surely wants
* the field references to refer to values from the proto tree when the
* filter was applied, not whatever it happens to be now if the user has
* clicked on a different packet.
*
* To get the new compiled filter, the user should refilter.
*/
/* Get the union of the flags for all tap listeners. */
tap_flags = union_of_tap_listener_flags();
/*
* Determine whether we need to create a protocol tree.
* We do if:
*
* we're going to apply a display filter;
*
* one of the tap listeners is going to apply a filter;
*
* one of the tap listeners requires a protocol tree;
*
* a postdissector wants field values or protocols on
* the first pass.
*/
create_proto_tree =
(cf->dfcode != NULL || have_filtering_tap_listeners() ||
(tap_flags & TL_REQUIRES_PROTO_TREE) || postdissectors_want_hfids());
*err = 0;
/* Don't freeze/thaw the list when doing live capture */
/*packet_list_freeze();*/
epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
TRY {
gint64 data_offset = 0;
column_info *cinfo;
/* If the display filter or any tap listeners require the columns,
* construct them. */
cinfo = (tap_listeners_require_columns() ||
dfilter_requires_columns(cf->dfcode)) ? &cf->cinfo : NULL;
while (to_read != 0) {
wtap_cleareof(cf->provider.wth);
if (!wtap_read(cf->provider.wth, rec, buf, err, &err_info,
&data_offset)) {
break;
}
if (cf->state == FILE_READ_ABORTED) {
/* Well, the user decided to exit Wireshark. Break out of the
loop, and let the code below (which is called even if there
aren't any packets left to read) exit. */
break;
}
if (read_record(cf, rec, buf, cf->dfcode, &edt, cinfo, data_offset, frame_dup_cache, frame_cksum)) {
newly_displayed_packets++;
}
to_read--;
}
wtap_rec_reset(rec);
}
CATCH(OutOfMemoryError) {
simple_message_box(ESD_TYPE_ERROR, NULL,
"More information and workarounds can be found at\n"
WS_WIKI_URL("KnownBugs/OutOfMemory"),
"Sorry, but Wireshark has run out of memory and has to terminate now.");
#if 0
/* Could we close the current capture and free up memory from that? */
return CF_READ_ABORTED;
#else
/* we have to terminate, as we cannot recover from the memory error */
exit(1);
#endif
}
ENDTRY;
/* Update the file encapsulation; it might have changed based on the
packets we've read. */
cf->lnk_t = wtap_file_encap(cf->provider.wth);
epan_dissect_cleanup(&edt);
/* Don't freeze/thaw the list when doing live capture */
/*packet_list_thaw();*/
/* With the new packet list the first packet
* isn't automatically selected.
*/
if (!cf->current_frame && !packet_list_multi_select_active())
packet_list_select_row_from_data(NULL);
if (cf->state == FILE_READ_ABORTED) {
/* Well, the user decided to exit Wireshark. Return CF_READ_ABORTED
so that our caller can kill off the capture child process;
this will cause an EOF on the pipe from the child, so
"cf_finish_tail()" will be called, and it will clean up
and exit. */
return CF_READ_ABORTED;
} else if (*err != 0) {
/* We got an error reading the capture file.
XXX - pop up a dialog box instead? */
if (err_info != NULL) {
ws_warning("Error \"%s\" while reading \"%s\" (\"%s\")",
wtap_strerror(*err), cf->filename, err_info);
g_free(err_info);
} else {
ws_warning("Error \"%s\" while reading \"%s\"",
wtap_strerror(*err), cf->filename);
}
return CF_READ_ERROR;
} else
return CF_READ_OK;
}
void
cf_fake_continue_tail(capture_file *cf)
{
if (cf->state == FILE_CLOSED) {
cf->state = FILE_READ_PENDING;
}
}
cf_read_status_t
cf_finish_tail(capture_file *cf, wtap_rec *rec, Buffer *buf, int *err,
fifo_string_cache_t *frame_dup_cache, GChecksum *frame_cksum)
{
gchar *err_info;
gint64 data_offset;
column_info *cinfo;
epan_dissect_t edt;
gboolean create_proto_tree;
guint tap_flags;
/* All the comments above in cf_continue_tail apply regarding the
* current display filter.
*/
/* Get the union of the flags for all tap listeners. */
tap_flags = union_of_tap_listener_flags();
/* If the display filter or any tap listeners require the columns,
* construct them. */
cinfo = (tap_listeners_require_columns() ||
dfilter_requires_columns(cf->dfcode)) ? &cf->cinfo : NULL;
/*
* Determine whether we need to create a protocol tree.
* We do if:
*
* we're going to apply a display filter;
*
* one of the tap listeners is going to apply a filter;
*
* one of the tap listeners requires a protocol tree;
*
* a postdissector wants field values or protocols on
* the first pass.
*/
create_proto_tree =
(cf->dfcode != NULL || have_filtering_tap_listeners() ||
(tap_flags & TL_REQUIRES_PROTO_TREE) || postdissectors_want_hfids());
if (cf->provider.wth == NULL) {
cf_close(cf);
return CF_READ_ERROR;
}
/* Don't freeze/thaw the list when doing live capture */
/*packet_list_freeze();*/
epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
while ((wtap_read(cf->provider.wth, rec, buf, err, &err_info, &data_offset))) {
if (cf->state == FILE_READ_ABORTED) {
/* Well, the user decided to abort the read. Break out of the
loop, and let the code below (which is called even if there
aren't any packets left to read) exit. */
break;
}
read_record(cf, rec, buf, cf->dfcode, &edt, cinfo, data_offset, frame_dup_cache, frame_cksum);
wtap_rec_reset(rec);
}
epan_dissect_cleanup(&edt);
/* Don't freeze/thaw the list when doing live capture */
/*packet_list_thaw();*/
if (cf->state == FILE_READ_ABORTED) {
/* Well, the user decided to abort the read. We're only called
when the child capture process closes the pipe to us (meaning
it's probably exited), so we can just close the capture
file; we return CF_READ_ABORTED so our caller can do whatever
is appropriate when that happens. */
cf_close(cf);
return CF_READ_ABORTED;
}
/* We're done reading sequentially through the file. */
cf->state = FILE_READ_DONE;
/* We're done reading sequentially through the file; close the
sequential I/O side, to free up memory it requires. */
wtap_sequential_close(cf->provider.wth);
/* Allow the protocol dissectors to free up memory that they
* don't need after the sequential run-through of the packets. */
postseq_cleanup_all_protocols();
/* Update the file encapsulation; it might have changed based on the
packets we've read. */
cf->lnk_t = wtap_file_encap(cf->provider.wth);
/* Update the details in the file-set dialog, as the capture file
* has likely grown since we first stat-ed it */
fileset_update_file(cf->filename);
if (*err != 0) {
/* We got an error reading the capture file.
XXX - pop up a dialog box? */
if (err_info != NULL) {
ws_warning("Error \"%s\" while reading \"%s\" (\"%s\")",
wtap_strerror(*err), cf->filename, err_info);
g_free(err_info);
} else {
ws_warning("Error \"%s\" while reading \"%s\"",
wtap_strerror(*err), cf->filename);
}
return CF_READ_ERROR;
} else {
return CF_READ_OK;
}
}
#endif /* HAVE_LIBPCAP */
gchar *
cf_get_display_name(capture_file *cf)
{
gchar *displayname;
/* Return a name to use in displays */
if (!cf->is_tempfile) {
/* Get the last component of the file name, and use that. */
if (cf->filename) {
displayname = g_filename_display_basename(cf->filename);
} else {
displayname=g_strdup("(No file)");
}
} else {
/* The file we read is a temporary file from a live capture or
a merge operation; we don't mention its name, but, if it's
from a capture, give the source of the capture. */
if (cf->source) {
displayname = g_strdup(cf->source);
} else {
displayname = g_strdup("(Untitled)");
}
}
return displayname;
}
gchar *
cf_get_basename(capture_file *cf)
{
gchar *displayname;
/* Return a name to use in the GUI for the basename for files to
which we save statistics */
if (!cf->is_tempfile) {
/* Get the last component of the file name, and use that. */
if (cf->filename) {
displayname = g_filename_display_basename(cf->filename);
/* If the file name ends with any extension that corresponds
to a file type we support - including compressed versions
of those files - strip it off. */
size_t displayname_len = strlen(displayname);
GSList *extensions = wtap_get_all_file_extensions_list();
GSList *suffix;
for (suffix = extensions; suffix != NULL; suffix = g_slist_next(suffix)) {
/* Does the file name end with that extension? */
const char *extension = (char *)suffix->data;
size_t extension_len = strlen(extension);
if (displayname_len > extension_len &&
displayname[displayname_len - extension_len - 1] == '.' &&
strcmp(&displayname[displayname_len - extension_len], extension) == 0) {
/* Yes. Strip the extension off, and return the result. */
displayname[displayname_len - extension_len - 1] = '\0';
break;
}
}
wtap_free_extensions_list(extensions);
} else {
displayname=g_strdup("");
}
} else {
/* The file we read is a temporary file from a live capture or
a merge operation; we don't mention its name, but, if it's
from a capture, give the source of the capture. */
if (cf->source) {
displayname = g_strdup(cf->source);
} else {
displayname = g_strdup("");
}
}
return displayname;
}
void
cf_set_tempfile_source(capture_file *cf, gchar *source)
{
if (cf->source) {
g_free(cf->source);
}
if (source) {
cf->source = g_strdup(source);
} else {
cf->source = g_strdup("");
}
}
const gchar *
cf_get_tempfile_source(capture_file *cf)
{
if (!cf->source) {
return "";
}
return cf->source;
}
/* XXX - use a macro instead? */
int
cf_get_packet_count(capture_file *cf)
{
return cf->count;
}
/* XXX - use a macro instead? */
gboolean
cf_is_tempfile(capture_file *cf)
{
return cf->is_tempfile;
}
void
cf_set_tempfile(capture_file *cf, gboolean is_tempfile)
{
cf->is_tempfile = is_tempfile;
}
/* XXX - use a macro instead? */
void
cf_set_drops_known(capture_file *cf, gboolean drops_known)
{
cf->drops_known = drops_known;
}
/* XXX - use a macro instead? */
void
cf_set_drops(capture_file *cf, guint32 drops)
{
cf->drops = drops;
}
/* XXX - use a macro instead? */
gboolean
cf_get_drops_known(capture_file *cf)
{
return cf->drops_known;
}
/* XXX - use a macro instead? */
guint32
cf_get_drops(capture_file *cf)
{
return cf->drops;
}
void
cf_set_rfcode(capture_file *cf, dfilter_t *rfcode)
{
cf->rfcode = rfcode;
}
static void
add_packet_to_packet_list(frame_data *fdata, capture_file *cf,
epan_dissect_t *edt, dfilter_t *dfcode, column_info *cinfo,
wtap_rec *rec, Buffer *buf, gboolean add_to_packet_list)
{
frame_data_set_before_dissect(fdata, &cf->elapsed_time,
&cf->provider.ref, cf->provider.prev_dis);
cf->provider.prev_cap = fdata;
if (dfcode != NULL) {
epan_dissect_prime_with_dfilter(edt, dfcode);
}
#if 0
/* Prepare coloring rules, this ensures that display filter rules containing
* frame.color_rule references are still processed.
* TODO: actually detect that situation or maybe apply other optimizations? */
if (edt->tree && color_filters_used()) {
color_filters_prime_edt(edt);
fdata->need_colorize = 1;
}
#endif
if (!fdata->visited) {
/* This is the first pass, so prime the epan_dissect_t with the
hfids postdissectors want on the first pass. */
prime_epan_dissect_with_postdissector_wanted_hfids(edt);
}
/* Initialize passed_dfilter here so that dissectors can hide packets. */
/* XXX We might want to add a separate "visible" bit to frame_data instead. */
fdata->passed_dfilter = 1;
/* Dissect the frame. */
epan_dissect_run_with_taps(edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, cinfo);
if (fdata->passed_dfilter && dfcode != NULL) {
fdata->passed_dfilter = dfilter_apply_edt(dfcode, edt) ? 1 : 0;
if (fdata->passed_dfilter && edt->pi.fd->dependent_frames) {
/* This frame passed the display filter but it may depend on other
* (potentially not displayed) frames. Find those frames and mark them
* as depended upon.
*/
g_hash_table_foreach(edt->pi.fd->dependent_frames, find_and_mark_frame_depended_upon, cf->provider.frames);
}
}
if (fdata->passed_dfilter || fdata->ref_time)
cf->displayed_count++;
if (add_to_packet_list) {
/* We fill the needed columns from new_packet_list */
packet_list_append(cinfo, fdata);
}
if (fdata->passed_dfilter || fdata->ref_time)
{
frame_data_set_after_dissect(fdata, &cf->cum_bytes);
/* The only way we use prev_dis is to get the time stamp of
* the previous displayed frame, so ignore it if it doesn't
* have a time stamp, because we're presumably interested in
* the timestamp of the previously displayed frame with a
* time. XXX: What if in the future we want to use the previously
* displayed frame for something else, too?
*/
if (fdata->has_ts) {
cf->provider.prev_dis = fdata;
}
/* If we haven't yet seen the first frame, this is it. */
if (cf->first_displayed == 0)
cf->first_displayed = fdata->num;
/* This is the last frame we've seen so far. */
cf->last_displayed = fdata->num;
}
epan_dissect_reset(edt);
}
/*
* Read in a new record.
* Returns TRUE if the packet was added to the packet (record) list,
* FALSE otherwise.
*/
static gboolean
read_record(capture_file *cf, wtap_rec *rec, Buffer *buf, dfilter_t *dfcode,
epan_dissect_t *edt, column_info *cinfo, gint64 offset,
fifo_string_cache_t *frame_dup_cache, GChecksum *frame_cksum)
{
frame_data fdlocal;
frame_data *fdata;
gboolean passed = TRUE;
gboolean added = FALSE;
const gchar *cksum_string;
gboolean was_in_cache;
/* Add this packet's link-layer encapsulation type to cf->linktypes, if
it's not already there.
XXX - yes, this is O(N), so if every packet had a different
link-layer encapsulation type, it'd be O(N^2) to read the file, but
there are probably going to be a small number of encapsulation types
in a file. */
if (rec->rec_type == REC_TYPE_PACKET) {
cf_add_encapsulation_type(cf, rec->rec_header.packet_header.pkt_encap);
}
/* The frame number of this packet, if we add it to the set of frames,
would be one more than the count of frames in the file so far. */
frame_data_init(&fdlocal, cf->count + 1, rec, offset, cf->cum_bytes);
if (cf->rfcode) {
epan_dissect_t rf_edt;
column_info *rf_cinfo = NULL;
epan_dissect_init(&rf_edt, cf->epan, TRUE, FALSE);
epan_dissect_prime_with_dfilter(&rf_edt, cf->rfcode);
if (dfilter_requires_columns(cf->rfcode)) {
rf_cinfo = &cf->cinfo;
}
epan_dissect_run(&rf_edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, &fdlocal, buf),
&fdlocal, rf_cinfo);
passed = dfilter_apply_edt(cf->rfcode, &rf_edt);
epan_dissect_cleanup(&rf_edt);
}
if (passed) {
added = TRUE;
/* This does a shallow copy of fdlocal, which is good enough. */
fdata = frame_data_sequence_add(cf->provider.frames, &fdlocal);
cf->count++;
if (rec->block != NULL)
cf->packet_comment_count += wtap_block_count_option(rec->block, OPT_COMMENT);
cf->f_datalen = offset + fdlocal.cap_len;
// Should we check if the frame data is a duplicate, and thus, ignore
// this frame?
if (frame_cksum != NULL && rec->rec_type == REC_TYPE_PACKET) {
g_checksum_reset(frame_cksum);
g_checksum_update(frame_cksum, ws_buffer_start_ptr(buf), ws_buffer_length(buf));
cksum_string = g_strdup(g_checksum_get_string(frame_cksum));
was_in_cache = fifo_string_cache_insert(frame_dup_cache, cksum_string);
if (was_in_cache) {
g_free((gpointer)cksum_string);
fdata->ignored = TRUE;
cf->ignored_count++;
}
}
/* When a redissection is in progress (or queued), do not process packets.
* This will be done once all (new) packets have been scanned. */
if (!cf->redissecting && cf->redissection_queued == RESCAN_NONE) {
add_packet_to_packet_list(fdata, cf, edt, dfcode, cinfo, rec, buf, TRUE);
}
}
return added;
}
typedef struct _callback_data_t {
gpointer pd_window;
gint64 f_len;
progdlg_t *progbar;
GTimer *prog_timer;
gboolean stop_flag;
} callback_data_t;
static gboolean
merge_callback(merge_event event, int num _U_,
const merge_in_file_t in_files[], const guint in_file_count,
void *data)
{
guint i;
callback_data_t *cb_data = (callback_data_t*) data;
ws_assert(cb_data != NULL);
switch (event) {
case MERGE_EVENT_INPUT_FILES_OPENED:
/* do nothing */
break;
case MERGE_EVENT_FRAME_TYPE_SELECTED:
/* do nothing */
break;
case MERGE_EVENT_READY_TO_MERGE:
/* Get the sum of the sizes of all the files. */
for (i = 0; i < in_file_count; i++)
cb_data->f_len += in_files[i].size;
cb_data->prog_timer = g_timer_new();
g_timer_start(cb_data->prog_timer);
break;
case MERGE_EVENT_RECORD_WAS_READ:
{
/* Create the progress bar if necessary.
We check on every iteration of the loop, so that it takes no
longer than the standard time to create it (otherwise, for a
large file, we might take considerably longer than that standard
time in order to get to the next progress bar step). */
if (cb_data->progbar == NULL) {
cb_data->progbar = delayed_create_progress_dlg(cb_data->pd_window, NULL, NULL,
FALSE, &cb_data->stop_flag, 0.0f);
}
/*
* Update the progress bar, but do it only after
* PROGBAR_UPDATE_INTERVAL has elapsed. Calling update_progress_dlg
* and packets_bar_update will likely trigger UI paint events, which
* might take a while depending on the platform and display. Reset
* our timer *after* painting.
*/
if (g_timer_elapsed(cb_data->prog_timer, NULL) > PROGBAR_UPDATE_INTERVAL) {
float progbar_val;
gint64 file_pos = 0;
/* Get the sum of the seek positions in all of the files. */
for (i = 0; i < in_file_count; i++)
file_pos += wtap_read_so_far(in_files[i].wth);
progbar_val = (gfloat) file_pos / (gfloat) cb_data->f_len;
if (progbar_val > 1.0f) {
/* Some file probably grew while we were reading it.
That "shouldn't happen", so we'll just clip the progress
value at 1.0. */
progbar_val = 1.0f;
}
if (cb_data->progbar != NULL) {
gchar status_str[100];
snprintf(status_str, sizeof(status_str),
"%" PRId64 "KB of %" PRId64 "KB",
file_pos / 1024, cb_data->f_len / 1024);
update_progress_dlg(cb_data->progbar, progbar_val, status_str);
}
g_timer_start(cb_data->prog_timer);
}
}
break;
case MERGE_EVENT_DONE:
/* We're done merging the files; destroy the progress bar if it was created. */
if (cb_data->progbar != NULL)
destroy_progress_dlg(cb_data->progbar);
g_timer_destroy(cb_data->prog_timer);
break;
}
return cb_data->stop_flag;
}
cf_status_t
cf_merge_files_to_tempfile(gpointer pd_window, const char *temp_dir, char **out_filenamep,
int in_file_count, const char *const *in_filenames,
int file_type, gboolean do_append)
{
int err = 0;
gchar *err_info = NULL;
guint err_fileno;
guint32 err_framenum;
merge_result status;
merge_progress_callback_t cb;
callback_data_t *cb_data = g_new0(callback_data_t, 1);
/* prepare our callback routine */
cb_data->pd_window = pd_window;
cb.callback_func = merge_callback;
cb.data = cb_data;
cf_callback_invoke(cf_cb_file_merge_started, NULL);
/* merge the files */
status = merge_files_to_tempfile(temp_dir, out_filenamep, "wireshark", file_type,
in_filenames,
in_file_count, do_append,
IDB_MERGE_MODE_ALL_SAME, 0 /* snaplen */,
"Wireshark", &cb, &err, &err_info,
&err_fileno, &err_framenum);
g_free(cb.data);
switch (status) {
case MERGE_OK:
break;
case MERGE_USER_ABORTED:
/* this isn't really an error, though we will return CF_ERROR later */
break;
case MERGE_ERR_CANT_OPEN_INFILE:
cfile_open_failure_alert_box(in_filenames[err_fileno], err, err_info);
break;
case MERGE_ERR_CANT_OPEN_OUTFILE:
cfile_dump_open_failure_alert_box(*out_filenamep, err, err_info,
file_type);
break;
case MERGE_ERR_CANT_READ_INFILE:
cfile_read_failure_alert_box(in_filenames[err_fileno], err, err_info);
break;
case MERGE_ERR_BAD_PHDR_INTERFACE_ID:
simple_error_message_box("Record %u of \"%s\" has an interface ID that does not match any IDB in its file.",
err_framenum, in_filenames[err_fileno]);
break;
case MERGE_ERR_CANT_WRITE_OUTFILE:
cfile_write_failure_alert_box(in_filenames[err_fileno],
*out_filenamep, err, err_info,
err_framenum, file_type);
break;
case MERGE_ERR_CANT_CLOSE_OUTFILE:
cfile_close_failure_alert_box(*out_filenamep, err, err_info);
break;
default:
simple_error_message_box("Unknown merge_files error %d", status);
break;
}
cf_callback_invoke(cf_cb_file_merge_finished, NULL);
if (status != MERGE_OK) {
/* Callers aren't expected to treat an error or an explicit abort
differently - we put up error dialogs ourselves, so they don't
have to. */
return CF_ERROR;
} else
return CF_OK;
}
cf_status_t
cf_filter_packets(capture_file *cf, gchar *dftext, gboolean force)
{
const char *filter_new = dftext ? dftext : "";
const char *filter_old = cf->dfilter ? cf->dfilter : "";
dfilter_t *dfcode;
df_error_t *df_err;
/* if new filter equals old one, do nothing unless told to do so */
/* XXX - The text can be the same without compiling to the same code.
* (Macros, field references, etc.)
*/
if (!force && strcmp(filter_new, filter_old) == 0) {
return CF_OK;
}
dfcode=NULL;
if (dftext == NULL) {
/* The new filter is an empty filter (i.e., display all packets).
* so leave dfcode==NULL
*/
} else {
/*
* We have a filter; make a copy of it (as we'll be saving it),
* and try to compile it.
*/
dftext = g_strdup(dftext);
if (!dfilter_compile(dftext, &dfcode, &df_err)) {
/* The attempt failed; report an error. */
simple_message_box(ESD_TYPE_ERROR, NULL,
"See the help for a description of the display filter syntax.",
"\"%s\" isn't a valid display filter: %s",
dftext, df_err->msg);
df_error_free(&df_err);
g_free(dftext);
return CF_ERROR;
}
/* Was it empty? */
if (dfcode == NULL) {
/* Yes - free the filter text, and set it to null. */
g_free(dftext);
dftext = NULL;
}
}
/* We have a valid filter. Replace the current filter. */
g_free(cf->dfilter);
cf->dfilter = dftext;
/* We'll recompile this when the rescan starts, or in cf_read()
* if no file is open currently. However, if no file is open and
* we start a new capture, we want to use this rather than
* recompiling in cf_continue_tail() */
dfilter_free(cf->dfcode);
cf->dfcode = dfcode;
/* Now rescan the packet list, applying the new filter, but not
* throwing away information constructed on a previous pass.
* If a dissection is already in progress, queue it.
*/
if (cf->redissection_queued == RESCAN_NONE) {
if (cf->read_lock) {
cf->redissection_queued = RESCAN_SCAN;
} else if (cf->state != FILE_CLOSED) {
if (dftext == NULL) {
rescan_packets(cf, "Resetting", "filter", FALSE);
} else {
rescan_packets(cf, "Filtering", dftext, FALSE);
}
}
}
return CF_OK;
}
void
cf_redissect_packets(capture_file *cf)
{
if (cf->read_lock || cf->redissection_queued == RESCAN_SCAN) {
/* Dissection in progress, signal redissection rather than rescanning. That
* would destroy the current (in-progress) dissection in "cf_read" which
* will cause issues when "cf_read" tries to add packets to the list.
* If a previous rescan was requested, "upgrade" it to a full redissection.
*/
cf->redissection_queued = RESCAN_REDISSECT;
}
if (cf->redissection_queued != RESCAN_NONE) {
/* Redissection is (already) queued, wait for "cf_read" to finish. */
return;
}
if (cf->state != FILE_CLOSED) {
/* Restart dissection in case no cf_read is pending. */
rescan_packets(cf, "Reprocessing", "all packets", TRUE);
}
}
gboolean
cf_read_record(capture_file *cf, const frame_data *fdata,
wtap_rec *rec, Buffer *buf)
{
int err;
gchar *err_info;
if (!wtap_seek_read(cf->provider.wth, fdata->file_off, rec, buf, &err, &err_info)) {
cfile_read_failure_alert_box(cf->filename, err, err_info);
return FALSE;
}
return TRUE;
}
gboolean
cf_read_record_no_alert(capture_file *cf, const frame_data *fdata,
wtap_rec *rec, Buffer *buf)
{
int err;
gchar *err_info;
if (!wtap_seek_read(cf->provider.wth, fdata->file_off, rec, buf, &err, &err_info)) {
g_free(err_info);
return FALSE;
}
return TRUE;
}
gboolean
cf_read_current_record(capture_file *cf)
{
return cf_read_record(cf, cf->current_frame, &cf->rec, &cf->buf);
}
/* Rescan the list of packets, reconstructing the CList.
"action" describes why we're doing this; it's used in the progress
dialog box.
"action_item" describes what we're doing; it's used in the progress
dialog box.
"redissect" is TRUE if we need to make the dissectors reconstruct
any state information they have (because a preference that affects
some dissector has changed, meaning some dissector might construct
its state differently from the way it was constructed the last time). */
static void
rescan_packets(capture_file *cf, const char *action, const char *action_item, gboolean redissect)
{
/* Rescan packets new packet list */
guint32 framenum;
frame_data *fdata;
wtap_rec rec;
Buffer buf;
progdlg_t *progbar = NULL;
GTimer *prog_timer = g_timer_new();
int count;
frame_data *selected_frame, *preceding_frame, *following_frame, *prev_frame;
int selected_frame_num, preceding_frame_num, following_frame_num, prev_frame_num;
gboolean selected_frame_seen;
float progbar_val;
gint64 start_time;
gchar status_str[100];
epan_dissect_t edt;
dfilter_t *dfcode = NULL;
column_info *cinfo;
gboolean create_proto_tree;
gboolean filtering_tap_listeners = FALSE;
guint tap_flags;
gboolean add_to_packet_list = FALSE;
gboolean compiled _U_;
guint32 frames_count;
gboolean queued_rescan_type = RESCAN_NONE;
if (cf->state == FILE_CLOSED || cf->state == FILE_READ_PENDING) {
return;
}
/* Rescan in progress, clear pending actions. */
cf->redissection_queued = RESCAN_NONE;
ws_assert(!cf->read_lock);
cf->read_lock = TRUE;
wtap_rec_init(&rec);
ws_buffer_init(&buf, 1514);
/* Compile the current display filter.
* The code it compiles to might have changed, e.g. if a display
* filter macro used has changed.
*
* We assume this will not fail since cf->dfilter is only set in
* cf_filter IFF the filter was valid.
* XXX - This is not necessarily true, if the filter has a FT_IPv4
* or FT_IPv6 field compared to a resolved hostname in it, because
* we do a new host lookup, and that *could* timeout this time
* (though with the read lock above we shouldn't have many lookups at
* once, reducing the chances of that)... (#19612)
*/
if (cf->dfilter) {
compiled = dfilter_compile(cf->dfilter, &dfcode, NULL);
ws_assert(compiled && dfcode);
}
dfilter_free(cf->dfcode);
cf->dfcode = dfcode;
/* Do we have any tap listeners with filters? */
filtering_tap_listeners = have_filtering_tap_listeners();
/* Update references in filters (if any) for the protocol
* tree corresponding to the currently selected frame in the GUI. */
if (cf->edt != NULL && cf->edt->tree != NULL) {
if (cf->dfcode)
dfilter_load_field_references(cf->dfcode, cf->edt->tree);
if (filtering_tap_listeners)
tap_listeners_load_field_references(cf->edt);
}
if (cf->dfcode != NULL) {
dfilter_log_full(LOG_DOMAIN_DFILTER, LOG_LEVEL_NOISY, NULL, -1, NULL,
cf->dfcode, "Rescanning packets with display filter");
}
/* Get the union of the flags for all tap listeners. */
tap_flags = union_of_tap_listener_flags();
/* If the display filter or any tap listeners require the columns,
* construct them. */
cinfo = (tap_listeners_require_columns() ||
dfilter_requires_columns(cf->dfcode)) ? &cf->cinfo : NULL;
/*
* Determine whether we need to create a protocol tree.
* We do if:
*
* we're going to apply a display filter;
*
* one of the tap listeners is going to apply a filter;
*
* one of the tap listeners requires a protocol tree;
*
* we're redissecting and a postdissector wants field
* values or protocols on the first pass.
*/
create_proto_tree =
(cf->dfcode != NULL || filtering_tap_listeners ||
(tap_flags & TL_REQUIRES_PROTO_TREE) ||
(redissect && postdissectors_want_hfids()));
reset_tap_listeners();
/* Which frame, if any, is the currently selected frame?
XXX - should the selected frame or the focus frame be the "current"
frame, that frame being the one from which "Find Frame" searches
start? */
selected_frame = cf->current_frame;
/* Mark frame num as not found */
selected_frame_num = -1;
/* Freeze the packet list while we redo it, so we don't get any
screen updates while it happens. */
packet_list_freeze();
if (redissect) {
/* We need to re-initialize all the state information that protocols
keep, because some preference that controls a dissector has changed,
which might cause the state information to be constructed differently
by that dissector. */
/* We might receive new packets while redissecting, and we don't
want to dissect those before their time. */
cf->redissecting = TRUE;
/* 'reset' dissection session */
epan_free(cf->epan);
if (cf->edt && cf->edt->pi.fd) {
/* All pointers in "per frame proto data" for the currently selected
packet are allocated in wmem_file_scope() and deallocated in epan_free().
Free them here to avoid unintended usage in packet_list_clear(). */
frame_data_destroy(cf->edt->pi.fd);
}
cf->epan = ws_epan_new(cf);
cf->cinfo.epan = cf->epan;
/* A new Lua tap listener may be registered in lua_prime_all_fields()
called via epan_new() / init_dissection() when reloading Lua plugins. */
if (!create_proto_tree && have_filtering_tap_listeners()) {
create_proto_tree = TRUE;
}
if (!cinfo && tap_listeners_require_columns()) {
cinfo = &cf->cinfo;
}
/* We need to redissect the packets so we have to discard our old
* packet list store. */
packet_list_clear();
add_to_packet_list = TRUE;
}
/* We don't yet know which will be the first and last frames displayed. */
cf->first_displayed = 0;
cf->last_displayed = 0;
/* We currently don't display any packets */
cf->displayed_count = 0;
/* Iterate through the list of frames. Call a routine for each frame
to check whether it should be displayed and, if so, add it to
the display list. */
cf->provider.ref = NULL;
cf->provider.prev_dis = NULL;
cf->provider.prev_cap = NULL;
cf->cum_bytes = 0;
cf_callback_invoke(cf_cb_file_rescan_started, cf);
g_timer_start(prog_timer);
/* Count of packets at which we've looked. */
count = 0;
/* Progress so far. */
progbar_val = 0.0f;
cf->stop_flag = FALSE;
start_time = g_get_monotonic_time();
/* no previous row yet */
prev_frame_num = -1;
prev_frame = NULL;
preceding_frame_num = -1;
preceding_frame = NULL;
following_frame_num = -1;
following_frame = NULL;
selected_frame_seen = FALSE;
frames_count = cf->count;
epan_dissect_init(&edt, cf->epan, create_proto_tree, FALSE);
if (redissect) {
/*
* Decryption secrets and name resolution blocks are read while
* sequentially processing records and then passed to the dissector.
* During redissection, the previous information is lost (see epan_free
* above), but they are not read again from the file as only packet
* records are re-read. Therefore reset the wtap secrets and name
* resolution callbacks such that wtap resupplies the callbacks with
* previously read information.
*/
wtap_set_cb_new_ipv4(cf->provider.wth, add_ipv4_name);
wtap_set_cb_new_ipv6(cf->provider.wth, (wtap_new_ipv6_callback_t) add_ipv6_name);
wtap_set_cb_new_secrets(cf->provider.wth, secrets_wtap_callback);
}
for (framenum = 1; framenum <= frames_count; framenum++) {
fdata = frame_data_sequence_find(cf->provider.frames, framenum);
/* Create the progress bar if necessary.
We check on every iteration of the loop, so that it takes no
longer than the standard time to create it (otherwise, for a
large file, we might take considerably longer than that standard
time in order to get to the next progress bar step). */
if (progbar == NULL)
progbar = delayed_create_progress_dlg(cf->window, action, action_item, TRUE,
&cf->stop_flag,
progbar_val);
/*
* Update the progress bar, but do it only after PROGBAR_UPDATE_INTERVAL
* has elapsed. Calling update_progress_dlg and packets_bar_update will
* likely trigger UI paint events, which might take a while depending on
* the platform and display. Reset our timer *after* painting.
*/
if (g_timer_elapsed(prog_timer, NULL) > PROGBAR_UPDATE_INTERVAL) {
/* let's not divide by zero. I should never be started
* with count == 0, so let's assert that
*/
ws_assert(cf->count > 0);
progbar_val = (gfloat) count / frames_count;
if (progbar != NULL) {
snprintf(status_str, sizeof(status_str),
"%4u of %u frames", count, frames_count);
update_progress_dlg(progbar, progbar_val, status_str);
}
g_timer_start(prog_timer);
}
queued_rescan_type = cf->redissection_queued;
if (queued_rescan_type != RESCAN_NONE) {
/* A redissection was requested while an existing redissection was
* pending. */
break;
}
if (cf->stop_flag) {
/* Well, the user decided to abort the filtering. Just stop.
XXX - go back to the previous filter? Users probably just
want not to wait for a filtering operation to finish;
unless we cancel by having no filter, reverting to the
previous filter will probably be even more expensive than
continuing the filtering, as it involves going back to the
beginning and filtering, and even with no filter we currently
have to re-generate the entire clist, which is also expensive.
I'm not sure what Network Monitor does, but it doesn't appear
to give you an unfiltered display if you cancel. */
break;
}
count++;
if (redissect) {
/* Since all state for the frame was destroyed, mark the frame
* as not visited, free the GSList referring to the state
* data (the per-frame data itself was freed by
* "init_dissection()"), and null out the GSList pointer. */
frame_data_reset(fdata);
frames_count = cf->count;
}
/* Frame dependencies from the previous dissection/filtering are no longer valid. */
fdata->dependent_of_displayed = 0;
if (!cf_read_record(cf, fdata, &rec, &buf))
break; /* error reading the frame */
/* If the previous frame is displayed, and we haven't yet seen the
selected frame, remember that frame - it's the closest one we've
yet seen before the selected frame. */
if (prev_frame_num != -1 && !selected_frame_seen && prev_frame->passed_dfilter) {
preceding_frame_num = prev_frame_num;
preceding_frame = prev_frame;
}
add_packet_to_packet_list(fdata, cf, &edt, cf->dfcode,
cinfo, &rec, &buf,
add_to_packet_list);
/* If this frame is displayed, and this is the first frame we've
seen displayed after the selected frame, remember this frame -
it's the closest one we've yet seen at or after the selected
frame. */
if (fdata->passed_dfilter && selected_frame_seen && following_frame_num == -1) {
following_frame_num = fdata->num;
following_frame = fdata;
}
if (fdata == selected_frame) {
selected_frame_seen = TRUE;
if (fdata->passed_dfilter)
selected_frame_num = fdata->num;
}
/* Remember this frame - it'll be the previous frame
on the next pass through the loop. */
prev_frame_num = fdata->num;
prev_frame = fdata;
wtap_rec_reset(&rec);
}
epan_dissect_cleanup(&edt);
wtap_rec_cleanup(&rec);
ws_buffer_free(&buf);
/* We are done redissecting the packet list. */
cf->redissecting = FALSE;
if (redissect) {
frames_count = cf->count;
/* Clear out what remains of the visited flags and per-frame data
pointers.
XXX - that may cause various forms of bogosity when dissecting
these frames, as they won't have been seen by this sequential
pass, but the only alternative I see is to keep scanning them
even though the user requested that the scan stop, and that
would leave the user stuck with an Wireshark grinding on
until it finishes. Should we just stick them with that? */
for (; framenum <= frames_count; framenum++) {
fdata = frame_data_sequence_find(cf->provider.frames, framenum);
frame_data_reset(fdata);
}
}
/* We're done filtering the packets; destroy the progress bar if it
was created. */
if (progbar != NULL)
destroy_progress_dlg(progbar);
g_timer_destroy(prog_timer);
/* Unfreeze the packet list. */
if (!add_to_packet_list)
packet_list_recreate_visible_rows();
/* Compute the time it took to filter the file */
compute_elapsed(cf, start_time);
packet_list_thaw();
/* It is safe again to execute redissections or sort. */
ws_assert(cf->read_lock);
cf->read_lock = FALSE;
cf_callback_invoke(cf_cb_file_rescan_finished, cf);
if (selected_frame_num == -1) {
/* The selected frame didn't pass the filter. */
if (selected_frame == NULL) {
/* That's because there *was* no selected frame. Make the first
displayed frame the current frame. */
selected_frame_num = 0;
} else {
/* Find the nearest displayed frame to the selected frame (whether
it's before or after that frame) and make that the current frame.
If the next and previous displayed frames are equidistant from the
selected frame, choose the next one. */
ws_assert(following_frame == NULL ||
following_frame->num >= selected_frame->num);
ws_assert(preceding_frame == NULL ||
preceding_frame->num <= selected_frame->num);
if (following_frame == NULL) {
/* No frame after the selected frame passed the filter, so we
have to select the last displayed frame before the selected
frame. */
selected_frame_num = preceding_frame_num;
selected_frame = preceding_frame;
} else if (preceding_frame == NULL) {
/* No frame before the selected frame passed the filter, so we
have to select the first displayed frame after the selected
frame. */
selected_frame_num = following_frame_num;
selected_frame = following_frame;
} else {
/* Frames before and after the selected frame passed the filter, so
we'll select the previous frame */
selected_frame_num = preceding_frame_num;
selected_frame = preceding_frame;
}
}
}
if (selected_frame_num == -1) {
/* There are no frames displayed at all. */
cf_unselect_packet(cf);
} else {
/* Either the frame that was selected passed the filter, or we've
found the nearest displayed frame to that frame. Select it, make
it the focus row, and make it visible. */
/* Set to invalid to force update of packet list and packet details */
if (selected_frame_num == 0) {
packet_list_select_row_from_data(NULL);
}else{
if (!packet_list_select_row_from_data(selected_frame)) {
/* We didn't find a row corresponding to this frame.
This means that the frame isn't being displayed currently,
so we can't select it. */
simple_message_box(ESD_TYPE_INFO, NULL,
"The capture file is probably not fully dissected.",
"End of capture exceeded.");
}
}
}
/* If another rescan (due to dfilter change) or redissection (due to profile
* change) was requested, the rescan above is aborted and restarted here. */
if (queued_rescan_type != RESCAN_NONE) {
redissect = redissect || queued_rescan_type == RESCAN_REDISSECT;
rescan_packets(cf, "Reprocessing", "all packets", redissect);
}
}
/*
* Scan through all frame data and recalculate the ref time
* without rereading the file.
* XXX - do we need a progress bar or is this fast enough?
*/
void
cf_reftime_packets(capture_file* cf)
{
guint32 framenum;
frame_data *fdata;
nstime_t rel_ts;
cf->provider.ref = NULL;
cf->provider.prev_dis = NULL;
cf->cum_bytes = 0;
for (framenum = 1; framenum <= cf->count; framenum++) {
fdata = frame_data_sequence_find(cf->provider.frames, framenum);
/* just add some value here until we know if it is being displayed or not */
fdata->cum_bytes = cf->cum_bytes + fdata->pkt_len;
/*
* Timestamps
*/
if (fdata->has_ts) {
/* If we don't have the time stamp of the first packet in the
capture, it's because this is the first packet. Save the time
stamp of this packet as the time stamp of the first packet. */
if (cf->provider.ref == NULL)
cf->provider.ref = fdata;
/* if this frames is marked as a reference time frame, reset
firstsec and firstusec to this frame */
if (fdata->ref_time)
cf->provider.ref = fdata;
/* Get the time elapsed between the first packet and this one. */
fdata->frame_ref_num = (fdata != cf->provider.ref) ? cf->provider.ref->num : 0;
nstime_delta(&rel_ts, &fdata->abs_ts, &cf->provider.ref->abs_ts);
/* If it's greater than the current elapsed time, set the elapsed
time to it (we check for "greater than" so as not to be
confused by time moving backwards). */
if ((gint32)cf->elapsed_time.secs < rel_ts.secs
|| ((gint32)cf->elapsed_time.secs == rel_ts.secs && (gint32)cf->elapsed_time.nsecs < rel_ts.nsecs)) {
cf->elapsed_time = rel_ts;
}
/* If this frame is displayed, get the time elapsed between the
previous displayed packet and this packet. */
/* XXX: What if in the future we want to use the previously
* displayed frame for something else, too? Then we'd want
* to store this frame as prev_dis even if it doesn't have a
* timestamp. */
if ( fdata->passed_dfilter ) {
/* If we don't have the time stamp of the previous displayed
packet, it's because this is the first displayed packet.
Save the time stamp of this packet as the time stamp of
the previous displayed packet. */
if (cf->provider.prev_dis == NULL) {
cf->provider.prev_dis = fdata;
}
fdata->prev_dis_num = cf->provider.prev_dis->num;
cf->provider.prev_dis = fdata;
}
} else {
/* If this frame doesn't have a timestamp, don't calculate
anything with relative times. */
/* However, if this frame is marked as a reference time frame,
clear the reference frame so that the next frame with a
timestamp becomes the reference frame. */
if (fdata->ref_time) {
cf->provider.ref = NULL;
}
}
/*
* Byte counts
*/
if ( (fdata->passed_dfilter) || (fdata->ref_time) ) {
/* This frame either passed the display filter list or is marked as
a time reference frame. All time reference frames are displayed
even if they don't pass the display filter */
if (fdata->ref_time) {
/* if this was a TIME REF frame we should reset the cum_bytes field */
cf->cum_bytes = fdata->pkt_len;
fdata->cum_bytes = cf->cum_bytes;
} else {
/* increase cum_bytes with this packets length */
cf->cum_bytes += fdata->pkt_len;
}
}
}
}
typedef enum {
PSP_FINISHED,
PSP_STOPPED,
PSP_FAILED
} psp_return_t;
static psp_return_t
process_specified_records(capture_file *cf, packet_range_t *range,
const char *string1, const char *string2, gboolean terminate_is_stop,
gboolean (*callback)(capture_file *, frame_data *,
wtap_rec *, Buffer *, void *),
void *callback_args,
gboolean show_progress_bar)
{
guint32 framenum;
frame_data *fdata;
wtap_rec rec;
Buffer buf;
psp_return_t ret = PSP_FINISHED;
progdlg_t *progbar = NULL;
GTimer *prog_timer = g_timer_new();
int progbar_count;
float progbar_val;
gchar progbar_status_str[100];
range_process_e process_this;
wtap_rec_init(&rec);
ws_buffer_init(&buf, 1514);
g_timer_start(prog_timer);
/* Count of packets at which we've looked. */
progbar_count = 0;
/* Progress so far. */
progbar_val = 0.0f;
if (cf->read_lock) {
ws_warning("Failing due to nested process_specified_records(\"%s\") call!", cf->filename);
return PSP_FAILED;
}
cf->read_lock = TRUE;
cf->stop_flag = FALSE;
if (range != NULL)
packet_range_process_init(range);
/* Iterate through all the packets, printing the packets that
were selected by the current display filter. */
for (framenum = 1; framenum <= cf->count; framenum++) {
fdata = frame_data_sequence_find(cf->provider.frames, framenum);
/* Create the progress bar if necessary.
We check on every iteration of the loop, so that it takes no
longer than the standard time to create it (otherwise, for a
large file, we might take considerably longer than that standard
time in order to get to the next progress bar step). */
if (show_progress_bar && progbar == NULL)
progbar = delayed_create_progress_dlg(cf->window, string1, string2,
terminate_is_stop,
&cf->stop_flag,
progbar_val);
/*
* Update the progress bar, but do it only after PROGBAR_UPDATE_INTERVAL
* has elapsed. Calling update_progress_dlg and packets_bar_update will
* likely trigger UI paint events, which might take a while depending on
* the platform and display. Reset our timer *after* painting.
*/
if (progbar && g_timer_elapsed(prog_timer, NULL) > PROGBAR_UPDATE_INTERVAL) {
/* let's not divide by zero. I should never be started
* with count == 0, so let's assert that
*/
ws_assert(cf->count > 0);
progbar_val = (gfloat) progbar_count / cf->count;
snprintf(progbar_status_str, sizeof(progbar_status_str),
"%4u of %u packets", progbar_count, cf->count);
update_progress_dlg(progbar, progbar_val, progbar_status_str);
g_timer_start(prog_timer);
}
if (cf->stop_flag) {
/* Well, the user decided to abort the operation. Just stop,
and arrange to return PSP_STOPPED to our caller, so they know
it was stopped explicitly. */
ret = PSP_STOPPED;
break;
}
progbar_count++;
if (range != NULL) {
/* do we have to process this packet? */
process_this = packet_range_process_packet(range, fdata);
if (process_this == range_process_next) {
/* this packet uninteresting, continue with next one */
continue;
} else if (process_this == range_processing_finished) {
/* all interesting packets processed, stop the loop */
break;
}
}
/* Get the packet */
if (!cf_read_record(cf, fdata, &rec, &buf)) {
/* Attempt to get the packet failed. */
ret = PSP_FAILED;
break;
}
/* Process the packet */
if (!callback(cf, fdata, &rec, &buf, callback_args)) {
/* Callback failed. We assume it reported the error appropriately. */
ret = PSP_FAILED;
break;
}
wtap_rec_reset(&rec);
}
/* We're done printing the packets; destroy the progress bar if
it was created. */
if (progbar != NULL)
destroy_progress_dlg(progbar);
g_timer_destroy(prog_timer);
ws_assert(cf->read_lock);
cf->read_lock = FALSE;
wtap_rec_cleanup(&rec);
ws_buffer_free(&buf);
return ret;
}
typedef struct {
epan_dissect_t edt;
column_info *cinfo;
} retap_callback_args_t;
static gboolean
retap_packet(capture_file *cf, frame_data *fdata, wtap_rec *rec, Buffer *buf,
void *argsp)
{
retap_callback_args_t *args = (retap_callback_args_t *)argsp;
epan_dissect_run_with_taps(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, args->cinfo);
epan_dissect_reset(&args->edt);
return TRUE;
}
cf_read_status_t
cf_retap_packets(capture_file *cf)
{
packet_range_t range;
retap_callback_args_t callback_args;
gboolean create_proto_tree;
gboolean filtering_tap_listeners;
guint tap_flags;
psp_return_t ret;
/* Presumably the user closed the capture file. */
if (cf == NULL) {
return CF_READ_ABORTED;
}
cf_callback_invoke(cf_cb_file_retap_started, cf);
/* Do we have any tap listeners with filters? */
filtering_tap_listeners = have_filtering_tap_listeners();
/* Update references in filters (if any) for the protocol
* tree corresponding to the currently selected frame in the GUI. */
/* XXX - What if we *don't* have a currently selected frame in the GUI,
* but we did the last time we loaded field references? Then they'll
* match something instead of nothing (unless they've been recompiled).
* Should we have a way to clear the field references even with a NULL tree?
*/
if (cf->edt != NULL && cf->edt->tree != NULL) {
if (filtering_tap_listeners)
tap_listeners_load_field_references(cf->edt);
}
/* Get the union of the flags for all tap listeners. */
tap_flags = union_of_tap_listener_flags();
/* If any tap listeners require the columns, construct them. */
callback_args.cinfo = (tap_listeners_require_columns()) ? &cf->cinfo : NULL;
/*
* Determine whether we need to create a protocol tree.
* We do if:
*
* one of the tap listeners is going to apply a filter;
*
* one of the tap listeners requires a protocol tree.
*/
create_proto_tree =
(filtering_tap_listeners || (tap_flags & TL_REQUIRES_PROTO_TREE));
/* Reset the tap listeners. */
reset_tap_listeners();
epan_dissect_init(&callback_args.edt, cf->epan, create_proto_tree, FALSE);
/* Iterate through the list of packets, dissecting all packets and
re-running the taps. */
packet_range_init(&range, cf);
packet_range_process_init(&range);
ret = process_specified_records(cf, &range, "Recalculating statistics on",
"all packets", TRUE, retap_packet,
&callback_args, TRUE);
packet_range_cleanup(&range);
epan_dissect_cleanup(&callback_args.edt);
cf_callback_invoke(cf_cb_file_retap_finished, cf);
switch (ret) {
case PSP_FINISHED:
/* Completed successfully. */
return CF_READ_OK;
case PSP_STOPPED:
/* Well, the user decided to abort the refiltering.
Return CF_READ_ABORTED so our caller knows they did that. */
return CF_READ_ABORTED;
case PSP_FAILED:
/* Error while retapping. */
return CF_READ_ERROR;
}
ws_assert_not_reached();
return CF_READ_OK;
}
typedef struct {
print_args_t *print_args;
gboolean print_header_line;
char *header_line_buf;
int header_line_buf_len;
gboolean print_formfeed;
gboolean print_separator;
char *line_buf;
int line_buf_len;
gint *col_widths;
int num_visible_cols;
gint *visible_cols;
epan_dissect_t edt;
} print_callback_args_t;
static gboolean
print_packet(capture_file *cf, frame_data *fdata, wtap_rec *rec, Buffer *buf,
void *argsp)
{
print_callback_args_t *args = (print_callback_args_t *)argsp;
int i;
char *cp;
int line_len;
int column_len;
int cp_off;
char bookmark_name[9+10+1]; /* "__frameNNNNNNNNNN__\0" */
char bookmark_title[6+10+1]; /* "Frame NNNNNNNNNN__\0" */
col_item_t* col_item;
const gchar* col_text;
/* Fill in the column information if we're printing the summary
information. */
if (args->print_args->print_summary) {
col_custom_prime_edt(&args->edt, &cf->cinfo);
epan_dissect_run(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, &cf->cinfo);
epan_dissect_fill_in_columns(&args->edt, FALSE, TRUE);
} else
epan_dissect_run(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, NULL);
if (args->print_formfeed) {
if (!new_page(args->print_args->stream))
goto fail;
/*
* Print another header line if we print a packet summary on the
* new page.
*/
if (args->print_args->print_col_headings)
args->print_header_line = TRUE;
} else {
if (args->print_separator) {
if (!print_line(args->print_args->stream, 0, ""))
goto fail;
}
}
/*
* We generate bookmarks, if the output format supports them.
* The name is "__frameN__".
*/
snprintf(bookmark_name, sizeof bookmark_name, "__frame%u__", fdata->num);
if (args->print_args->print_summary) {
if (!args->print_args->print_col_headings)
args->print_header_line = FALSE;
if (args->print_header_line) {
if (!print_line(args->print_args->stream, 0, args->header_line_buf))
goto fail;
args->print_header_line = FALSE; /* we might not need to print any more */
}
cp = &args->line_buf[0];
line_len = 0;
for (i = 0; i < args->num_visible_cols; i++) {
col_item = &cf->cinfo.columns[args->visible_cols[i]];
col_text = get_column_text(&cf->cinfo, args->visible_cols[i]);
/* Find the length of the string for this column. */
column_len = (int) strlen(col_text);
if (args->col_widths[i] > column_len)
column_len = args->col_widths[i];
/* Make sure there's room in the line buffer for the column; if not,
double its length. */
line_len += column_len + 1; /* "+1" for space */
if (line_len > args->line_buf_len) {
cp_off = (int) (cp - args->line_buf);
args->line_buf_len = 2 * line_len;
args->line_buf = (char *)g_realloc(args->line_buf, args->line_buf_len + 1);
cp = args->line_buf + cp_off;
}
/* Right-justify the packet number column. */
if (col_item->col_fmt == COL_NUMBER)
snprintf(cp, column_len+1, "%*s", args->col_widths[i], col_text);
else
snprintf(cp, column_len+1, "%-*s", args->col_widths[i], col_text);
cp += column_len;
if (i != args->num_visible_cols - 1)
*cp++ = ' ';
}
*cp = '\0';
/*
* Generate a bookmark, using the summary line as the title.
*/
if (!print_bookmark(args->print_args->stream, bookmark_name,
args->line_buf))
goto fail;
if (!print_line(args->print_args->stream, 0, args->line_buf))
goto fail;
} else {
/*
* Generate a bookmark, using "Frame N" as the title, as we're not
* printing the summary line.
*/
snprintf(bookmark_title, sizeof bookmark_title, "Frame %u", fdata->num);
if (!print_bookmark(args->print_args->stream, bookmark_name,
bookmark_title))
goto fail;
} /* if (print_summary) */
if (args->print_args->print_dissections != print_dissections_none) {
if (args->print_args->print_summary) {
/* Separate the summary line from the tree with a blank line. */
if (!print_line(args->print_args->stream, 0, ""))
goto fail;
}
/* Print the information in that tree. */
if (!proto_tree_print(args->print_args->print_dissections,
args->print_args->print_hex, &args->edt, NULL,
args->print_args->stream))
goto fail;
/* Print a blank line if we print anything after this (aka more than one packet). */
args->print_separator = TRUE;
/* Print a header line if we print any more packet summaries */
if (args->print_args->print_col_headings)
args->print_header_line = TRUE;
}
if (args->print_args->print_hex) {
if (args->print_args->print_summary || (args->print_args->print_dissections != print_dissections_none)) {
if (!print_line(args->print_args->stream, 0, ""))
goto fail;
}
/* Print the full packet data as hex. */
if (!print_hex_data(args->print_args->stream, &args->edt, args->print_args->hexdump_options))
goto fail;
/* Print a blank line if we print anything after this (aka more than one packet). */
args->print_separator = TRUE;
/* Print a header line if we print any more packet summaries */
if (args->print_args->print_col_headings)
args->print_header_line = TRUE;
} /* if (args->print_args->print_dissections != print_dissections_none) */
epan_dissect_reset(&args->edt);
/* do we want to have a formfeed between each packet from now on? */
if (args->print_args->print_formfeed) {
args->print_formfeed = TRUE;
}
return TRUE;
fail:
epan_dissect_reset(&args->edt);
return FALSE;
}
cf_print_status_t
cf_print_packets(capture_file *cf, print_args_t *print_args,
gboolean show_progress_bar)
{
print_callback_args_t callback_args;
gint data_width;
char *cp;
int i, cp_off, column_len, line_len;
int num_visible_col = 0, last_visible_col = 0, visible_col_count;
psp_return_t ret;
GList *clp;
fmt_data *cfmt;
gboolean proto_tree_needed;
callback_args.print_args = print_args;
callback_args.print_header_line = print_args->print_col_headings;
callback_args.header_line_buf = NULL;
callback_args.header_line_buf_len = 256;
callback_args.print_formfeed = FALSE;
callback_args.print_separator = FALSE;
callback_args.line_buf = NULL;
callback_args.line_buf_len = 256;
callback_args.col_widths = NULL;
callback_args.num_visible_cols = 0;
callback_args.visible_cols = NULL;
if (!print_preamble(print_args->stream, cf->filename, get_ws_vcs_version_info())) {
destroy_print_stream(print_args->stream);
return CF_PRINT_WRITE_ERROR;
}
if (print_args->print_summary) {
/* We're printing packet summaries. Allocate the header line buffer
and get the column widths. */
callback_args.header_line_buf = (char *)g_malloc(callback_args.header_line_buf_len + 1);
/* Find the number of visible columns and the last visible column */
for (i = 0; i < prefs.num_cols; i++) {
clp = g_list_nth(prefs.col_list, i);
if (clp == NULL) /* Sanity check, Invalid column requested */
continue;
cfmt = (fmt_data *) clp->data;
if (cfmt->visible) {
num_visible_col++;
last_visible_col = i;
}
}
/* if num_visible_col is 0, we are done */
if (num_visible_col == 0) {
g_free(callback_args.header_line_buf);
return CF_PRINT_OK;
}
/* Find the widths for each of the columns - maximum of the
width of the title and the width of the data - and construct
a buffer with a line containing the column titles. */
callback_args.num_visible_cols = num_visible_col;
callback_args.col_widths = g_new(gint, num_visible_col);
callback_args.visible_cols = g_new(gint, num_visible_col);
cp = &callback_args.header_line_buf[0];
line_len = 0;
visible_col_count = 0;
for (i = 0; i < cf->cinfo.num_cols; i++) {
clp = g_list_nth(prefs.col_list, i);
if (clp == NULL) /* Sanity check, Invalid column requested */
continue;
cfmt = (fmt_data *) clp->data;
if (cfmt->visible == FALSE)
continue;
/* Save the order of visible columns */
callback_args.visible_cols[visible_col_count] = i;
/* Don't pad the last column. */
if (i == last_visible_col)
callback_args.col_widths[visible_col_count] = 0;
else {
callback_args.col_widths[visible_col_count] = (gint) strlen(cf->cinfo.columns[i].col_title);
data_width = get_column_char_width(get_column_format(i));
if (data_width > callback_args.col_widths[visible_col_count])
callback_args.col_widths[visible_col_count] = data_width;
}
/* Find the length of the string for this column. */
column_len = (int) strlen(cf->cinfo.columns[i].col_title);
if (callback_args.col_widths[visible_col_count] > column_len)
column_len = callback_args.col_widths[visible_col_count];
/* Make sure there's room in the line buffer for the column; if not,
double its length. */
line_len += column_len + 1; /* "+1" for space */
if (line_len > callback_args.header_line_buf_len) {
cp_off = (int) (cp - callback_args.header_line_buf);
callback_args.header_line_buf_len = 2 * line_len;
callback_args.header_line_buf = (char *)g_realloc(callback_args.header_line_buf,
callback_args.header_line_buf_len + 1);
cp = callback_args.header_line_buf + cp_off;
}
/* Right-justify the packet number column. */
/* if (cf->cinfo.col_fmt[i] == COL_NUMBER)
snprintf(cp, column_len+1, "%*s", callback_args.col_widths[visible_col_count], cf->cinfo.columns[i].col_title);
else*/
snprintf(cp, column_len+1, "%-*s", callback_args.col_widths[visible_col_count], cf->cinfo.columns[i].col_title);
cp += column_len;
if (i != cf->cinfo.num_cols - 1)
*cp++ = ' ';
visible_col_count++;
}
*cp = '\0';
/* Now start out the main line buffer with the same length as the
header line buffer. */
callback_args.line_buf_len = callback_args.header_line_buf_len;
callback_args.line_buf = (char *)g_malloc(callback_args.line_buf_len + 1);
} /* if (print_summary) */
/* Create the protocol tree, and make it visible, if we're printing
the dissection or the hex data.
XXX - do we need it if we're just printing the hex data? */
proto_tree_needed =
callback_args.print_args->print_dissections != print_dissections_none ||
callback_args.print_args->print_hex ||
have_custom_cols(&cf->cinfo) || have_field_extractors();
epan_dissect_init(&callback_args.edt, cf->epan, proto_tree_needed, proto_tree_needed);
/* Iterate through the list of packets, printing the packets we were
told to print. */
ret = process_specified_records(cf, &print_args->range, "Printing",
"selected packets", TRUE, print_packet,
&callback_args, show_progress_bar);
epan_dissect_cleanup(&callback_args.edt);
g_free(callback_args.header_line_buf);
g_free(callback_args.line_buf);
g_free(callback_args.col_widths);
g_free(callback_args.visible_cols);
switch (ret) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* Well, the user decided to abort the printing.
XXX - note that what got generated before they did that
will get printed if we're piping to a print program; we'd
have to write to a file and then hand that to the print
program to make it actually not print anything. */
break;
case PSP_FAILED:
/* Error while printing.
XXX - note that what got generated before they did that
will get printed if we're piping to a print program; we'd
have to write to a file and then hand that to the print
program to make it actually not print anything. */
destroy_print_stream(print_args->stream);
return CF_PRINT_WRITE_ERROR;
}
if (!print_finale(print_args->stream)) {
destroy_print_stream(print_args->stream);
return CF_PRINT_WRITE_ERROR;
}
if (!destroy_print_stream(print_args->stream))
return CF_PRINT_WRITE_ERROR;
return CF_PRINT_OK;
}
typedef struct {
FILE *fh;
epan_dissect_t edt;
print_args_t *print_args;
json_dumper jdumper;
} write_packet_callback_args_t;
static gboolean
write_pdml_packet(capture_file *cf, frame_data *fdata, wtap_rec *rec,
Buffer *buf, void *argsp)
{
write_packet_callback_args_t *args = (write_packet_callback_args_t *)argsp;
/* Create the protocol tree, but don't fill in the column information. */
epan_dissect_run(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, NULL);
/* Write out the information in that tree. */
write_pdml_proto_tree(NULL, &args->edt, &cf->cinfo, args->fh, FALSE);
epan_dissect_reset(&args->edt);
return !ferror(args->fh);
}
cf_print_status_t
cf_write_pdml_packets(capture_file *cf, print_args_t *print_args)
{
write_packet_callback_args_t callback_args;
FILE *fh;
psp_return_t ret;
fh = ws_fopen(print_args->file, "w");
if (fh == NULL)
return CF_PRINT_OPEN_ERROR; /* attempt to open destination failed */
write_pdml_preamble(fh, cf->filename);
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
callback_args.fh = fh;
callback_args.print_args = print_args;
epan_dissect_init(&callback_args.edt, cf->epan, TRUE, TRUE);
/* Iterate through the list of packets, printing the packets we were
told to print. */
ret = process_specified_records(cf, &print_args->range, "Writing PDML",
"selected packets", TRUE,
write_pdml_packet, &callback_args, TRUE);
epan_dissect_cleanup(&callback_args.edt);
switch (ret) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* Well, the user decided to abort the printing. */
break;
case PSP_FAILED:
/* Error while printing. */
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
write_pdml_finale(fh);
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
/* XXX - check for an error */
fclose(fh);
return CF_PRINT_OK;
}
static gboolean
write_psml_packet(capture_file *cf, frame_data *fdata, wtap_rec *rec,
Buffer *buf, void *argsp)
{
write_packet_callback_args_t *args = (write_packet_callback_args_t *)argsp;
/* Fill in the column information */
col_custom_prime_edt(&args->edt, &cf->cinfo);
epan_dissect_run(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, &cf->cinfo);
epan_dissect_fill_in_columns(&args->edt, FALSE, TRUE);
/* Write out the column information. */
write_psml_columns(&args->edt, args->fh, FALSE);
epan_dissect_reset(&args->edt);
return !ferror(args->fh);
}
cf_print_status_t
cf_write_psml_packets(capture_file *cf, print_args_t *print_args)
{
write_packet_callback_args_t callback_args;
FILE *fh;
psp_return_t ret;
gboolean proto_tree_needed;
fh = ws_fopen(print_args->file, "w");
if (fh == NULL)
return CF_PRINT_OPEN_ERROR; /* attempt to open destination failed */
write_psml_preamble(&cf->cinfo, fh);
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
callback_args.fh = fh;
callback_args.print_args = print_args;
/* Fill in the column information, only create the protocol tree
if having custom columns or field extractors. */
proto_tree_needed = have_custom_cols(&cf->cinfo) || have_field_extractors();
epan_dissect_init(&callback_args.edt, cf->epan, proto_tree_needed, proto_tree_needed);
/* Iterate through the list of packets, printing the packets we were
told to print. */
ret = process_specified_records(cf, &print_args->range, "Writing PSML",
"selected packets", TRUE,
write_psml_packet, &callback_args, TRUE);
epan_dissect_cleanup(&callback_args.edt);
switch (ret) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* Well, the user decided to abort the printing. */
break;
case PSP_FAILED:
/* Error while printing. */
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
write_psml_finale(fh);
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
/* XXX - check for an error */
fclose(fh);
return CF_PRINT_OK;
}
static gboolean
write_csv_packet(capture_file *cf, frame_data *fdata, wtap_rec *rec,
Buffer *buf, void *argsp)
{
write_packet_callback_args_t *args = (write_packet_callback_args_t *)argsp;
/* Fill in the column information */
col_custom_prime_edt(&args->edt, &cf->cinfo);
epan_dissect_run(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, &cf->cinfo);
epan_dissect_fill_in_columns(&args->edt, FALSE, TRUE);
/* Write out the column information. */
write_csv_columns(&args->edt, args->fh);
epan_dissect_reset(&args->edt);
return !ferror(args->fh);
}
cf_print_status_t
cf_write_csv_packets(capture_file *cf, print_args_t *print_args)
{
write_packet_callback_args_t callback_args;
gboolean proto_tree_needed;
FILE *fh;
psp_return_t ret;
fh = ws_fopen(print_args->file, "w");
if (fh == NULL)
return CF_PRINT_OPEN_ERROR; /* attempt to open destination failed */
write_csv_column_titles(&cf->cinfo, fh);
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
callback_args.fh = fh;
callback_args.print_args = print_args;
/* only create the protocol tree if having custom columns or field extractors. */
proto_tree_needed = have_custom_cols(&cf->cinfo) || have_field_extractors();
epan_dissect_init(&callback_args.edt, cf->epan, proto_tree_needed, proto_tree_needed);
/* Iterate through the list of packets, printing the packets we were
told to print. */
ret = process_specified_records(cf, &print_args->range, "Writing CSV",
"selected packets", TRUE,
write_csv_packet, &callback_args, TRUE);
epan_dissect_cleanup(&callback_args.edt);
switch (ret) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* Well, the user decided to abort the printing. */
break;
case PSP_FAILED:
/* Error while printing. */
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
/* XXX - check for an error */
fclose(fh);
return CF_PRINT_OK;
}
static gboolean
carrays_write_packet(capture_file *cf, frame_data *fdata, wtap_rec *rec,
Buffer *buf, void *argsp)
{
write_packet_callback_args_t *args = (write_packet_callback_args_t *)argsp;
epan_dissect_run(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, NULL);
write_carrays_hex_data(fdata->num, args->fh, &args->edt);
epan_dissect_reset(&args->edt);
return !ferror(args->fh);
}
cf_print_status_t
cf_write_carrays_packets(capture_file *cf, print_args_t *print_args)
{
write_packet_callback_args_t callback_args;
FILE *fh;
psp_return_t ret;
fh = ws_fopen(print_args->file, "w");
if (fh == NULL)
return CF_PRINT_OPEN_ERROR; /* attempt to open destination failed */
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
callback_args.fh = fh;
callback_args.print_args = print_args;
epan_dissect_init(&callback_args.edt, cf->epan, TRUE, TRUE);
/* Iterate through the list of packets, printing the packets we were
told to print. */
ret = process_specified_records(cf, &print_args->range,
"Writing C Arrays",
"selected packets", TRUE,
carrays_write_packet, &callback_args, TRUE);
epan_dissect_cleanup(&callback_args.edt);
switch (ret) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* Well, the user decided to abort the printing. */
break;
case PSP_FAILED:
/* Error while printing. */
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
fclose(fh);
return CF_PRINT_OK;
}
static gboolean
write_json_packet(capture_file *cf, frame_data *fdata, wtap_rec *rec,
Buffer *buf, void *argsp)
{
write_packet_callback_args_t *args = (write_packet_callback_args_t *)argsp;
/* Create the protocol tree, but don't fill in the column information. */
epan_dissect_run(&args->edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, NULL);
/* Write out the information in that tree. */
write_json_proto_tree(NULL, args->print_args->print_dissections,
args->print_args->print_hex,
&args->edt, &cf->cinfo, proto_node_group_children_by_unique,
&args->jdumper);
epan_dissect_reset(&args->edt);
return !ferror(args->fh);
}
cf_print_status_t
cf_write_json_packets(capture_file *cf, print_args_t *print_args)
{
write_packet_callback_args_t callback_args;
FILE *fh;
psp_return_t ret;
fh = ws_fopen(print_args->file, "w");
if (fh == NULL)
return CF_PRINT_OPEN_ERROR; /* attempt to open destination failed */
callback_args.jdumper = write_json_preamble(fh);
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
callback_args.fh = fh;
callback_args.print_args = print_args;
epan_dissect_init(&callback_args.edt, cf->epan, TRUE, TRUE);
/* Iterate through the list of packets, printing the packets we were
told to print. */
ret = process_specified_records(cf, &print_args->range, "Writing JSON",
"selected packets", TRUE,
write_json_packet, &callback_args, TRUE);
epan_dissect_cleanup(&callback_args.edt);
switch (ret) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* Well, the user decided to abort the printing. */
break;
case PSP_FAILED:
/* Error while printing. */
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
write_json_finale(&callback_args.jdumper);
if (ferror(fh)) {
fclose(fh);
return CF_PRINT_WRITE_ERROR;
}
/* XXX - check for an error */
fclose(fh);
return CF_PRINT_OK;
}
gboolean
cf_find_packet_protocol_tree(capture_file *cf, const char *string,
search_direction dir, bool multiple)
{
match_data mdata;
mdata.frame_matched = FALSE;
mdata.halt = FALSE;
mdata.string = string;
mdata.string_len = strlen(string);
mdata.cf = cf;
mdata.prev_finfo = cf->finfo_selected;
if (multiple && cf->finfo_selected && cf->edt) {
if (dir == SD_FORWARD) {
proto_tree_children_foreach(cf->edt->tree, match_subtree_text, &mdata);
} else {
proto_tree_children_foreach(cf->edt->tree, match_subtree_text_reverse, &mdata);
}
if (mdata.frame_matched) {
packet_list_select_finfo(mdata.finfo);
return TRUE;
}
}
return find_packet(cf, match_protocol_tree, &mdata, dir);
}
field_info*
cf_find_string_protocol_tree(capture_file *cf, proto_tree *tree)
{
match_data mdata;
mdata.frame_matched = FALSE;
mdata.halt = FALSE;
mdata.string = convert_string_case(cf->sfilter, cf->case_type);
mdata.string_len = strlen(mdata.string);
mdata.cf = cf;
mdata.prev_finfo = NULL;
/* Iterate through all the nodes looking for matching text */
if (cf->dir == SD_FORWARD) {
proto_tree_children_foreach(tree, match_subtree_text, &mdata);
} else {
proto_tree_children_foreach(tree, match_subtree_text_reverse, &mdata);
}
g_free((char *)mdata.string);
return mdata.frame_matched ? mdata.finfo : NULL;
}
static match_result
match_protocol_tree(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
match_data *mdata = (match_data *)criterion;
epan_dissect_t edt;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
/* Construct the protocol tree, including the displayed text */
epan_dissect_init(&edt, cf->epan, TRUE, TRUE);
/* We don't need the column information */
epan_dissect_run(&edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, NULL);
/* Iterate through all the nodes, seeing if they have text that matches. */
mdata->cf = cf;
mdata->frame_matched = FALSE;
mdata->halt = FALSE;
mdata->prev_finfo = NULL;
/* We don't care about the direction here, because we're just looking
* for one match and we'll destroy this tree anyway. (We find the actual
* field later in PacketList::selectionChanged().) Forwards is faster.
*/
proto_tree_children_foreach(edt.tree, match_subtree_text, mdata);
epan_dissect_cleanup(&edt);
return mdata->frame_matched ? MR_MATCHED : MR_NOTMATCHED;
}
static void
match_subtree_text(proto_node *node, gpointer data)
{
match_data *mdata = (match_data *) data;
const gchar *string = mdata->string;
size_t string_len = mdata->string_len;
capture_file *cf = mdata->cf;
field_info *fi = PNODE_FINFO(node);
gchar label_str[ITEM_LABEL_LENGTH];
gchar *label_ptr;
size_t label_len;
guint32 i, i_restart;
guint8 c_char;
size_t c_match = 0;
/* dissection with an invisible proto tree? */
ws_assert(fi);
if (mdata->frame_matched) {
/* We already had a match; don't bother doing any more work. */
return;
}
/* Don't match invisible entries. */
if (proto_item_is_hidden(node))
return;
if (mdata->prev_finfo) {
/* Haven't found the old match, so don't match this node. */
if (fi == mdata->prev_finfo) {
/* Found the old match, look for the next one after this. */
mdata->prev_finfo = NULL;
}
} else {
/* was a free format label produced? */
if (fi->rep) {
label_ptr = fi->rep->representation;
} else {
/* no, make a generic label */
label_ptr = label_str;
proto_item_fill_label(fi, label_str);
}
if (cf->regex) {
if (ws_regex_matches(cf->regex, label_ptr)) {
mdata->frame_matched = TRUE;
mdata->finfo = fi;
return;
}
} else if (cf->case_type) {
/* Case insensitive match */
label_len = strlen(label_ptr);
i_restart = 0;
for (i = 0; i < label_len; i++) {
if (i_restart == 0 && c_match == 0 && (label_len - i < string_len))
break;
c_char = label_ptr[i];
c_char = g_ascii_toupper(c_char);
/* If c_match is non-zero, save candidate for retrying full match. */
if (c_match > 0 && i_restart == 0 && c_char == string[0])
i_restart = i;
if (c_char == string[c_match]) {
c_match++;
if (c_match == string_len) {
mdata->frame_matched = TRUE;
mdata->finfo = fi;
/* No need to look further; we have a match */
return;
}
} else if (i_restart) {
i = i_restart;
c_match = 1;
i_restart = 0;
} else
c_match = 0;
}
} else if (strstr(label_ptr, string) != NULL) {
/* Case sensitive match */
mdata->frame_matched = TRUE;
mdata->finfo = fi;
return;
}
}
/* Recurse into the subtree, if it exists */
if (node->first_child != NULL)
proto_tree_children_foreach(node, match_subtree_text, mdata);
}
static void
match_subtree_text_reverse(proto_node *node, gpointer data)
{
match_data *mdata = (match_data *) data;
const gchar *string = mdata->string;
size_t string_len = mdata->string_len;
capture_file *cf = mdata->cf;
field_info *fi = PNODE_FINFO(node);
gchar label_str[ITEM_LABEL_LENGTH];
gchar *label_ptr;
size_t label_len;
guint32 i, i_restart;
guint8 c_char;
size_t c_match = 0;
/* dissection with an invisible proto tree? */
ws_assert(fi);
/* We don't have an easy way to search backwards in the tree
* (see also, proto_find_field_from_offset()) because we don't
* have a previous node pointer, so we search backwards by
* searching forwards, only stopping if we see the old match
* (if we have one).
*/
if (mdata->halt) {
return;
}
/* Don't match invisible entries. */
if (proto_item_is_hidden(node))
return;
if (mdata->prev_finfo && fi == mdata->prev_finfo) {
/* Found the old match, use the previous match. */
mdata->halt = TRUE;
return;
}
/* was a free format label produced? */
if (fi->rep) {
label_ptr = fi->rep->representation;
} else {
/* no, make a generic label */
label_ptr = label_str;
proto_item_fill_label(fi, label_str);
}
if (cf->regex) {
if (ws_regex_matches(cf->regex, label_ptr)) {
mdata->frame_matched = TRUE;
mdata->finfo = fi;
}
} else if (cf->case_type) {
/* Case insensitive match */
label_len = strlen(label_ptr);
i_restart = 0;
for (i = 0; i < label_len; i++) {
if (i_restart == 0 && c_match == 0 && (label_len - i < string_len))
break;
c_char = label_ptr[i];
c_char = g_ascii_toupper(c_char);
/* If c_match is non-zero, save candidate for retrying full match. */
if (c_match > 0 && i_restart == 0 && c_char == string[0])
i_restart = i;
if (c_char == string[c_match]) {
c_match++;
if (c_match == string_len) {
mdata->frame_matched = TRUE;
mdata->finfo = fi;
break;
}
} else if (i_restart) {
i = i_restart;
c_match = 1;
i_restart = 0;
} else
c_match = 0;
}
} else if (strstr(label_ptr, string) != NULL) {
/* Case sensitive match */
mdata->frame_matched = TRUE;
mdata->finfo = fi;
}
/* Recurse into the subtree, if it exists */
if (node->first_child != NULL)
proto_tree_children_foreach(node, match_subtree_text_reverse, mdata);
}
gboolean
cf_find_packet_summary_line(capture_file *cf, const char *string,
search_direction dir)
{
match_data mdata;
mdata.string = string;
mdata.string_len = strlen(string);
return find_packet(cf, match_summary_line, &mdata, dir);
}
static match_result
match_summary_line(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
match_data *mdata = (match_data *)criterion;
const gchar *string = mdata->string;
size_t string_len = mdata->string_len;
epan_dissect_t edt;
const char *info_column;
size_t info_column_len;
match_result result = MR_NOTMATCHED;
gint colx;
guint32 i, i_restart;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
/* Don't bother constructing the protocol tree */
epan_dissect_init(&edt, cf->epan, FALSE, FALSE);
/* Get the column information */
epan_dissect_run(&edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, &cf->cinfo);
/* Find the Info column */
for (colx = 0; colx < cf->cinfo.num_cols; colx++) {
if (cf->cinfo.columns[colx].fmt_matx[COL_INFO]) {
/* Found it. See if we match. */
info_column = get_column_text(edt.pi.cinfo, colx);
info_column_len = strlen(info_column);
if (cf->regex) {
if (ws_regex_matches(cf->regex, info_column)) {
result = MR_MATCHED;
break;
}
} else if (cf->case_type) {
/* Case insensitive match */
i_restart = 0;
for (i = 0; i < info_column_len; i++) {
if (i_restart == 0 && c_match == 0 && (info_column_len - i < string_len))
break;
c_char = info_column[i];
c_char = g_ascii_toupper(c_char);
/* If c_match is non-zero, save candidate for retrying full match. */
if (c_match > 0 && i_restart == 0 && c_char == string[0])
i_restart = i;
if (c_char == string[c_match]) {
c_match++;
if (c_match == string_len) {
result = MR_MATCHED;
break;
}
} else if (i_restart) {
i = i_restart;
c_match = 1;
i_restart = 0;
} else
c_match = 0;
}
} else if (strstr(info_column, string) != NULL) {
/* Case sensitive match */
result = MR_MATCHED;
}
break;
}
}
epan_dissect_cleanup(&edt);
return result;
}
typedef struct {
const guint8 *data;
size_t data_len;
ws_mempbrk_pattern *pattern;
} cbs_t; /* "Counted byte string" */
/*
* The current match_* routines only support ASCII case insensitivity and don't
* convert UTF-8 inputs to UTF-16 for matching. The UTF-16 support just
* interleaves with \0 bytes, which works for 7 bit ASCII.
*
* We could modify them to use the GLib Unicode routines or the International
* Components for Unicode library but it's not apparent that we could do so
* without consuming a lot more CPU and memory or that searching would be
* significantly better.
*
* XXX: We could test the search string to see if it's all ASCII, and if not
* use Unicode aware routines for case insensitive searches or any UTF-16
* search.
*/
gboolean
cf_find_packet_data(capture_file *cf, const guint8 *string, size_t string_size,
search_direction dir, bool multiple)
{
cbs_t info;
guint8 needles[3];
ws_mempbrk_pattern pattern = {0};
ws_match_function match_function;
info.data = string;
info.data_len = string_size;
/* Regex, String or hex search? */
if (cf->regex) {
/* Regular Expression search */
match_function = (cf->dir == SD_FORWARD) ? match_regex : match_regex_reverse;
} else if (cf->string) {
/* String search - what type of string? */
if (cf->case_type) {
needles[0] = string[0];
needles[1] = g_ascii_tolower(needles[0]);
needles[2] = '\0';
ws_mempbrk_compile(&pattern, needles);
info.pattern = &pattern;
switch (cf->scs_type) {
case SCS_NARROW_AND_WIDE:
match_function = (cf->dir == SD_FORWARD) ? match_narrow_and_wide_case : match_narrow_and_wide_case_reverse;
break;
case SCS_NARROW:
match_function = (cf->dir == SD_FORWARD) ? match_narrow_case : match_narrow_case_reverse;
break;
case SCS_WIDE:
match_function = (cf->dir == SD_FORWARD) ? match_wide_case : match_wide_case_reverse;
break;
default:
ws_assert_not_reached();
return FALSE;
}
} else {
switch (cf->scs_type) {
case SCS_NARROW_AND_WIDE:
match_function = (cf->dir == SD_FORWARD) ? match_narrow_and_wide : match_narrow_and_wide_reverse;
break;
case SCS_NARROW:
/* Narrow, case-sensitive match is the same as looking
* for a converted hexstring. */
match_function = (cf->dir == SD_FORWARD) ? match_binary : match_binary_reverse;
break;
case SCS_WIDE:
match_function = (cf->dir == SD_FORWARD) ? match_wide : match_wide_reverse;
break;
default:
ws_assert_not_reached();
return FALSE;
}
}
} else {
match_function = (cf->dir == SD_FORWARD) ? match_binary : match_binary_reverse;
}
if (multiple && cf->current_frame && (cf->search_pos || cf->search_len)) {
/* Use the current frame (this will perform the equivalent of
* cf_read_current_record() in match_function).
*/
if (match_function(cf, cf->current_frame, &cf->rec, &cf->buf, &info)) {
cf->search_in_progress = TRUE;
if (cf->edt) {
field_info *fi = NULL;
/* The regex match can match an empty string. */
if (cf->search_len) {
fi = proto_find_field_from_offset(cf->edt->tree, cf->search_pos + cf->search_len - 1, cf->edt->tvb);
}
packet_list_select_finfo(fi);
} else {
packet_list_select_row_from_data(cf->current_frame);
}
cf->search_in_progress = FALSE;
return TRUE;
}
}
cf->search_pos = 0; /* Reset the position */
cf->search_len = 0; /* Reset length */
return find_packet(cf, match_function, &info, dir);
}
static match_result
match_narrow_and_wide(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
result = MR_NOTMATCHED;
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_start;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte past the previous match start */
pd += cf->search_pos + 1;
}
for (; pd < buf_end; pd++) {
pd = (guint8 *)memchr(pd, ascii_text[0], buf_end - pd);
if (pd == NULL) break;
/* Try narrow match at this start location */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = pd[i];
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
} else {
break;
}
}
/* Now try wide match at the same start location. */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = pd[i];
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
static match_result
match_narrow_and_wide_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
result = MR_NOTMATCHED;
/* Has to be room to hold the sought data. */
if (textlen > fdata->cap_len) {
return result;
}
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_end - textlen;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte before the previous match start */
pd = buf_start + cf->search_pos - 1;
}
for (; pd < buf_end; pd++) {
pd = (uint8_t *)ws_memrchr(buf_start, ascii_text[0], pd - buf_start + 1);
if (pd == NULL) break;
/* Try narrow match at this start location */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = pd[i];
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
} else {
break;
}
}
/* Now try wide match at the same start location. */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = pd[i];
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
/* Case insensitive match */
static match_result
match_narrow_and_wide_case(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
ws_mempbrk_pattern *pattern = info->pattern;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
ws_assert(pattern != NULL);
result = MR_NOTMATCHED;
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_start;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte past the previous match start */
pd += cf->search_pos + 1;
}
for (; pd < buf_end; pd++) {
pd = (guint8 *)ws_mempbrk_exec(pd, buf_end - pd, pattern, &c_char);
if (pd == NULL) break;
/* Try narrow match at this start location */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
} else {
break;
}
}
/* Now try wide match at the same start location. */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
static match_result
match_narrow_and_wide_case_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
ws_mempbrk_pattern *pattern = info->pattern;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
ws_assert(pattern != NULL);
result = MR_NOTMATCHED;
/* Has to be room to hold the sought data. */
if (textlen > fdata->cap_len) {
return result;
}
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_end - textlen;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte before the previous match start */
pd = buf_start + cf->search_pos - 1;
}
for (; pd >= buf_start; pd--) {
pd = (guint8 *)ws_memrpbrk_exec(buf_start, pd - buf_start + 1, pattern, &c_char);
if (pd == NULL) break;
/* Try narrow match at this start location */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
} else {
break;
}
}
/* Now try wide match at the same start location. */
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
/* Case insensitive match */
static match_result
match_narrow_case(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
ws_mempbrk_pattern *pattern = info->pattern;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
ws_assert(pattern != NULL);
result = MR_NOTMATCHED;
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_start;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte past the previous match start */
pd += cf->search_pos + 1;
}
for (; pd < buf_end; pd++) {
pd = (guint8 *)ws_mempbrk_exec(pd, buf_end - pd, pattern, &c_char);
if (pd == NULL) break;
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
/* Save position and length for highlighting the field. */
result = MR_MATCHED;
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
} else {
break;
}
}
}
done:
return result;
}
static match_result
match_narrow_case_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
ws_mempbrk_pattern *pattern = info->pattern;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
ws_assert(pattern != NULL);
result = MR_NOTMATCHED;
/* Has to be room to hold the sought data. */
if (textlen > fdata->cap_len) {
return result;
}
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_end - textlen;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte before the previous match start */
pd = buf_start + cf->search_pos - 1;
}
for (; pd >= buf_start; pd--) {
pd = (guint8 *)ws_memrpbrk_exec(buf_start, pd - buf_start + 1, pattern, &c_char);
if (pd == NULL) break;
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
/* Save position and length for highlighting the field. */
result = MR_MATCHED;
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
} else {
break;
}
}
}
done:
return result;
}
static match_result
match_wide(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
result = MR_NOTMATCHED;
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_start;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte past the previous match start */
pd += cf->search_pos + 1;
}
for (; pd < buf_end; pd++) {
pd = (guint8 *)memchr(pd, ascii_text[0], buf_end - pd);
if (pd == NULL) break;
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = pd[i];
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
static match_result
match_wide_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
result = MR_NOTMATCHED;
/* Has to be room to hold the sought data. */
if (textlen > fdata->cap_len) {
return result;
}
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_end - textlen;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte before the previous match start */
pd = buf_start + cf->search_pos - 1;
}
for (; pd < buf_end; pd++) {
pd = (uint8_t *)ws_memrchr(buf_start, ascii_text[0], pd - buf_start + 1);
if (pd == NULL) break;
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = pd[i];
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
/* Case insensitive match */
static match_result
match_wide_case(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
ws_mempbrk_pattern *pattern = info->pattern;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
ws_assert(pattern != NULL);
result = MR_NOTMATCHED;
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_start;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte past the previous match start */
pd += cf->search_pos + 1;
}
for (; pd < buf_end; pd++) {
pd = (guint8 *)ws_mempbrk_exec(pd, buf_end - pd, pattern, &c_char);
if (pd == NULL) break;
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
/* Case insensitive match */
static match_result
match_wide_case_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
const guint8 *ascii_text = info->data;
size_t textlen = info->data_len;
ws_mempbrk_pattern *pattern = info->pattern;
match_result result;
guint32 buf_len;
guint8 *pd, *buf_start, *buf_end;
guint32 i;
guint8 c_char;
size_t c_match = 0;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
ws_assert(pattern != NULL);
result = MR_NOTMATCHED;
/* Has to be room to hold the sought data. */
if (textlen > fdata->cap_len) {
return result;
}
buf_len = fdata->cap_len;
buf_start = ws_buffer_start_ptr(buf);
buf_end = buf_start + buf_len;
pd = buf_end - textlen;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte before the previous match start */
pd = buf_start + cf->search_pos - 1;
}
for (; pd >= buf_start; pd--) {
pd = (guint8 *)ws_memrpbrk_exec(buf_start, pd - buf_start + 1, pattern, &c_char);
if (pd == NULL) break;
c_match = 0;
for (i = 0; pd + i < buf_end; i++) {
c_char = g_ascii_toupper(pd[i]);
if (c_char == ascii_text[c_match]) {
c_match++;
if (c_match == textlen) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)(i + 1);
goto done;
}
i++;
if (pd + i >= buf_end || pd[i] != '\0') break;
} else {
break;
}
}
}
done:
return result;
}
static match_result
match_binary(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
size_t datalen = info->data_len;
match_result result;
const uint8_t *pd = NULL, *buf_start;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
result = MR_NOTMATCHED;
buf_start = ws_buffer_start_ptr(buf);
size_t offset = 0;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte past the previous match start */
offset = cf->search_pos + 1;
}
if (offset < fdata->cap_len) {
pd = ws_memmem(buf_start + offset, fdata->cap_len - offset, info->data, datalen);
}
if (pd != NULL) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)datalen;
}
return result;
}
static match_result
match_binary_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
cbs_t *info = (cbs_t *)criterion;
size_t datalen = info->data_len;
match_result result;
const uint8_t *pd = NULL, *buf_start;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
result = MR_NOTMATCHED;
buf_start = ws_buffer_start_ptr(buf);
/* Has to be room to hold the sought data. */
if (datalen > fdata->cap_len) {
return result;
}
pd = buf_start + fdata->cap_len - datalen;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte before the previous match start */
pd = buf_start + cf->search_pos - 1;
}
for (; pd >= buf_start; pd--) {
pd = (uint8_t *)ws_memrchr(buf_start, info->data[0], pd - buf_start + 1);
if (pd == NULL) break;
if (memcmp(pd, info->data, datalen) == 0) {
result = MR_MATCHED;
/* Save position and length for highlighting the field. */
cf->search_pos = (uint32_t)(pd - buf_start);
cf->search_len = (uint32_t)datalen;
break;
}
}
return result;
}
static match_result
match_regex(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion _U_)
{
match_result result = MR_NOTMATCHED;
size_t result_pos[2] = {0, 0};
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
size_t offset = 0;
if (cf->search_len || cf->search_pos) {
/* we want to start searching one byte past the previous match start */
offset = cf->search_pos + 1;
}
if (offset < fdata->cap_len) {
if (ws_regex_matches_pos(cf->regex,
(const gchar *)ws_buffer_start_ptr(buf),
fdata->cap_len, offset,
result_pos)) {
//TODO: A chosen regex can match the empty string (zero length)
// which doesn't make a lot of sense for searching the packet bytes.
// Should we search with the PCRE2_NOTEMPTY option?
//TODO: Fix cast.
/* Save position and length for highlighting the field. */
cf->search_pos = (guint32)(result_pos[0]);
cf->search_len = (guint32)(result_pos[1] - result_pos[0]);
result = MR_MATCHED;
}
}
return result;
}
static match_result
match_regex_reverse(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion _U_)
{
match_result result = MR_NOTMATCHED;
size_t result_pos[2] = {0, 0};
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
size_t offset = fdata->cap_len - 1;
if (cf->search_pos) {
/* we want to start searching one byte before the previous match */
offset = cf->search_pos - 1;
}
for (; offset > 0; offset--) {
if (ws_regex_matches_pos(cf->regex,
(const gchar *)ws_buffer_start_ptr(buf),
fdata->cap_len, offset,
result_pos)) {
//TODO: A chosen regex can match the empty string (zero length)
// which doesn't make a lot of sense for searching the packet bytes.
// Should we search with the PCRE2_NOTEMPTY option?
//TODO: Fix cast.
/* Save position and length for highlighting the field. */
cf->search_pos = (guint32)(result_pos[0]);
cf->search_len = (guint32)(result_pos[1] - result_pos[0]);
result = MR_MATCHED;
break;
}
}
return result;
}
gboolean
cf_find_packet_dfilter(capture_file *cf, dfilter_t *sfcode,
search_direction dir)
{
return find_packet(cf, match_dfilter, sfcode, dir);
}
gboolean
cf_find_packet_dfilter_string(capture_file *cf, const char *filter,
search_direction dir)
{
dfilter_t *sfcode;
gboolean result;
if (!dfilter_compile(filter, &sfcode, NULL)) {
/*
* XXX - this shouldn't happen, as the filter string is machine
* generated
*/
return FALSE;
}
if (sfcode == NULL) {
/*
* XXX - this shouldn't happen, as the filter string is machine
* generated.
*/
return FALSE;
}
result = find_packet(cf, match_dfilter, sfcode, dir);
dfilter_free(sfcode);
return result;
}
static match_result
match_dfilter(capture_file *cf, frame_data *fdata,
wtap_rec *rec, Buffer *buf, void *criterion)
{
dfilter_t *sfcode = (dfilter_t *)criterion;
epan_dissect_t edt;
match_result result;
/* Load the frame's data. */
if (!cf_read_record(cf, fdata, rec, buf)) {
/* Attempt to get the packet failed. */
return MR_ERROR;
}
epan_dissect_init(&edt, cf->epan, TRUE, FALSE);
epan_dissect_prime_with_dfilter(&edt, sfcode);
epan_dissect_run(&edt, cf->cd_t, rec,
frame_tvbuff_new_buffer(&cf->provider, fdata, buf),
fdata, NULL);
result = dfilter_apply_edt(sfcode, &edt) ? MR_MATCHED : MR_NOTMATCHED;
epan_dissect_cleanup(&edt);
return result;
}
gboolean
cf_find_packet_marked(capture_file *cf, search_direction dir)
{
return find_packet(cf, match_marked, NULL, dir);
}
static match_result
match_marked(capture_file *cf _U_, frame_data *fdata, wtap_rec *rec _U_,
Buffer *buf _U_, void *criterion _U_)
{
return fdata->marked ? MR_MATCHED : MR_NOTMATCHED;
}
gboolean
cf_find_packet_time_reference(capture_file *cf, search_direction dir)
{
return find_packet(cf, match_time_reference, NULL, dir);
}
static match_result
match_time_reference(capture_file *cf _U_, frame_data *fdata, wtap_rec *rec _U_,
Buffer *buf _U_, void *criterion _U_)
{
return fdata->ref_time ? MR_MATCHED : MR_NOTMATCHED;
}
static gboolean
find_packet(capture_file *cf, ws_match_function match_function,
void *criterion, search_direction dir)
{
frame_data *start_fd;
guint32 framenum;
guint32 prev_framenum;
frame_data *fdata;
wtap_rec rec;
Buffer buf;
frame_data *new_fd = NULL;
progdlg_t *progbar = NULL;
GTimer *prog_timer = g_timer_new();
int count;
gboolean succeeded;
float progbar_val;
gchar status_str[100];
match_result result;
wtap_rec_init(&rec);
ws_buffer_init(&buf, 1514);
start_fd = cf->current_frame;
if (start_fd != NULL) {
prev_framenum = start_fd->num;
} else {
prev_framenum = 0; /* No start packet selected. */
}
/* Iterate through the list of packets, starting at the packet we've
picked, calling a routine to run the filter on the packet, see if
it matches, and stop if so. */
count = 0;
framenum = prev_framenum;
g_timer_start(prog_timer);
/* Progress so far. */
progbar_val = 0.0f;
cf->stop_flag = FALSE;
for (;;) {
/* Create the progress bar if necessary.
We check on every iteration of the loop, so that it takes no
longer than the standard time to create it (otherwise, for a
large file, we might take considerably longer than that standard
time in order to get to the next progress bar step). */
if (progbar == NULL)
progbar = delayed_create_progress_dlg(cf->window, NULL, NULL,
FALSE, &cf->stop_flag, progbar_val);
/*
* Update the progress bar, but do it only after PROGBAR_UPDATE_INTERVAL
* has elapsed. Calling update_progress_dlg and packets_bar_update will
* likely trigger UI paint events, which might take a while depending on
* the platform and display. Reset our timer *after* painting.
*/
if (g_timer_elapsed(prog_timer, NULL) > PROGBAR_UPDATE_INTERVAL) {
/* let's not divide by zero. I should never be started
* with count == 0, so let's assert that
*/
ws_assert(cf->count > 0);
progbar_val = (gfloat) count / cf->count;
snprintf(status_str, sizeof(status_str),
"%4u of %u packets", count, cf->count);
update_progress_dlg(progbar, progbar_val, status_str);
g_timer_start(prog_timer);
}
if (cf->stop_flag) {
/* Well, the user decided to abort the search. Go back to the
frame where we started. */
new_fd = start_fd;
break;
}
/* Go past the current frame. */
if (dir == SD_BACKWARD) {
/* Go on to the previous frame. */
if (framenum <= 1) {
/*
* XXX - other apps have a bit more of a detailed message
* for this, and instead of offering "OK" and "Cancel",
* they offer things such as "Continue" and "Cancel";
* we need an API for popping up alert boxes with
* {Verb} and "Cancel".
*/
if (prefs.gui_find_wrap) {
statusbar_push_temporary_msg("Search reached the beginning. Continuing at end.");
framenum = cf->count; /* wrap around */
} else {
statusbar_push_temporary_msg("Search reached the beginning.");
framenum = prev_framenum; /* stay on previous packet */
}
} else
framenum--;
} else {
/* Go on to the next frame. */
if (framenum == cf->count) {
if (prefs.gui_find_wrap) {
statusbar_push_temporary_msg("Search reached the end. Continuing at beginning.");
framenum = 1; /* wrap around */
} else {
statusbar_push_temporary_msg("Search reached the end.");
framenum = prev_framenum; /* stay on previous packet */
}
} else
framenum++;
}
fdata = frame_data_sequence_find(cf->provider.frames, framenum);
count++;
/* Is this packet in the display? */
if (fdata && fdata->passed_dfilter) {
/* Yes. Does it match the search criterion? */
result = (*match_function)(cf, fdata, &rec, &buf, criterion);
if (result == MR_ERROR) {
/* Error; our caller has reported the error. Go back to the frame
where we started. */
new_fd = start_fd;
break;
} else if (result == MR_MATCHED) {
/* Yes. Go to the new frame. */
new_fd = fdata;
break;
}
wtap_rec_reset(&rec);
}
if (fdata == start_fd) {
/* We're back to the frame we were on originally, and that frame
doesn't match the search filter. The search failed. */
break;
}
}
/* We're done scanning the packets; destroy the progress bar if it
was created. */
if (progbar != NULL)
destroy_progress_dlg(progbar);
g_timer_destroy(prog_timer);
if (new_fd != NULL) {
/* We found a frame that's displayed and that matches.
Try to find and select the packet summary list row for that frame. */
gboolean found_row;
cf->search_in_progress = TRUE;
found_row = packet_list_select_row_from_data(new_fd);
cf->search_in_progress = FALSE;
if (!found_row) {
/* We didn't find a row corresponding to this frame.
This means that the frame isn't being displayed currently,
so we can't select it. */
cf->search_pos = 0; /* Reset the position */
cf->search_len = 0; /* Reset length */
simple_message_box(ESD_TYPE_INFO, NULL,
"The capture file is probably not fully dissected.",
"End of capture exceeded.");
succeeded = FALSE; /* The search succeeded but we didn't find the row */
} else
succeeded = TRUE; /* The search succeeded and we found the row */
} else
succeeded = FALSE; /* The search failed */
wtap_rec_cleanup(&rec);
ws_buffer_free(&buf);
return succeeded;
}
gboolean
cf_goto_frame(capture_file *cf, guint fnumber)
{
frame_data *fdata;
if (cf == NULL || cf->provider.frames == NULL) {
/* we don't have a loaded capture file - fix for bugs 11810 & 11989 */
statusbar_push_temporary_msg("There is no file loaded");
return FALSE; /* we failed to go to that packet */
}
fdata = frame_data_sequence_find(cf->provider.frames, fnumber);
if (fdata == NULL) {
/* we didn't find a packet with that packet number */
statusbar_push_temporary_msg("There is no packet number %u.", fnumber);
return FALSE; /* we failed to go to that packet */
}
if (!fdata->passed_dfilter) {
/* that packet currently isn't displayed */
/* XXX - add it to the set of displayed packets? */
statusbar_push_temporary_msg("Packet number %u isn't displayed.", fnumber);
return FALSE; /* we failed to go to that packet */
}
if (!packet_list_select_row_from_data(fdata)) {
/* We didn't find a row corresponding to this frame.
This means that the frame isn't being displayed currently,
so we can't select it. */
simple_message_box(ESD_TYPE_INFO, NULL,
"The capture file is probably not fully dissected.",
"End of capture exceeded.");
return FALSE;
}
return TRUE; /* we got to that packet */
}
/*
* Go to frame specified by currently selected protocol tree item.
*/
gboolean
cf_goto_framenum(capture_file *cf)
{
header_field_info *hfinfo;
guint32 framenum;
if (cf->finfo_selected) {
hfinfo = cf->finfo_selected->hfinfo;
ws_assert(hfinfo);
if (hfinfo->type == FT_FRAMENUM) {
framenum = fvalue_get_uinteger(cf->finfo_selected->value);
if (framenum != 0)
return cf_goto_frame(cf, framenum);
}
}
return FALSE;
}
/* Select the packet on a given row. */
void
cf_select_packet(capture_file *cf, frame_data *fdata)
{
epan_dissect_t *old_edt;
/* check the frame data struct pointer for this frame */
if (fdata == NULL) {
return;
}
/* Get the data in that frame. */
if (!cf_read_record(cf, fdata, &cf->rec, &cf->buf)) {
return;
}
/* Record that this frame is the current frame. */
cf->current_frame = fdata;
/*
* The change to defer freeing the current epan_dissect_t was in
* commit a2bb94c3b33d53f42534aceb7cc67aab1d1fb1f9; to quote
* that commit's comment:
*
* Clear GtkTreeStore before freeing edt
*
* When building current data for packet details treeview we store two
* things.
* - Generated string with item label
* - Pointer to node field_info structure
*
* After epan_dissect_{free, cleanup} pointer to field_info node is no
* longer valid so we should clear GtkTreeStore before freeing.
*
* XXX - we're no longer using GTK+; is there a way to ensure that
* *nothing* refers to any of the current frame information before
* we replace it?
*/
old_edt = cf->edt;
/* Create the logical protocol tree. */
/* We don't need the columns here. */
cf->edt = epan_dissect_new(cf->epan, TRUE, TRUE);
tap_build_interesting(cf->edt);
epan_dissect_run(cf->edt, cf->cd_t, &cf->rec,
frame_tvbuff_new_buffer(&cf->provider, cf->current_frame, &cf->buf),
cf->current_frame, NULL);
if (old_edt != NULL)
epan_dissect_free(old_edt);
}
/* Unselect the selected packet, if any. */
void
cf_unselect_packet(capture_file *cf)
{
epan_dissect_t *old_edt = cf->edt;
/*
* See the comment in cf_select_packet() about deferring the freeing
* of the old cf->edt.
*/
cf->edt = NULL;
/* No packet is selected. */
cf->current_frame = NULL;
/* Destroy the epan_dissect_t for the unselected packet. */
if (old_edt != NULL)
epan_dissect_free(old_edt);
}
/*
* Mark a particular frame.
*/
void
cf_mark_frame(capture_file *cf, frame_data *frame)
{
if (! frame->marked) {
frame->marked = TRUE;
if (cf->count > cf->marked_count)
cf->marked_count++;
}
}
/*
* Unmark a particular frame.
*/
void
cf_unmark_frame(capture_file *cf, frame_data *frame)
{
if (frame->marked) {
frame->marked = FALSE;
if (cf->marked_count > 0)
cf->marked_count--;
}
}
/*
* Ignore a particular frame.
*/
void
cf_ignore_frame(capture_file *cf, frame_data *frame)
{
if (! frame->ignored) {
frame->ignored = TRUE;
if (cf->count > cf->ignored_count)
cf->ignored_count++;
}
}
/*
* Un-ignore a particular frame.
*/
void
cf_unignore_frame(capture_file *cf, frame_data *frame)
{
if (frame->ignored) {
frame->ignored = FALSE;
if (cf->ignored_count > 0)
cf->ignored_count--;
}
}
/*
* Modify the section comment.
*/
void
cf_update_section_comment(capture_file *cf, gchar *comment)
{
wtap_block_t shb_inf;
gchar *shb_comment;
/* Get the first SHB. */
/* XXX - support multiple SHBs */
shb_inf = wtap_file_get_shb(cf->provider.wth, 0);
/* Get the first comment from the SHB. */
/* XXX - support multiple comments */
if (wtap_block_get_nth_string_option_value(shb_inf, OPT_COMMENT, 0, &shb_comment) != WTAP_OPTTYPE_SUCCESS) {
/* There's no comment - add one. */
wtap_block_add_string_option(shb_inf, OPT_COMMENT, comment, strlen(comment));
} else {
/* See if the comment has changed or not */
if (strcmp(shb_comment, comment) == 0) {
g_free(comment);
return;
}
/* The comment has changed, let's update it */
wtap_block_set_nth_string_option_value(shb_inf, OPT_COMMENT, 0, comment, strlen(comment));
}
/* Mark the file as having unsaved changes */
cf->unsaved_changes = TRUE;
}
/*
* Modify the section comments for a given section.
*/
void
cf_update_section_comments(capture_file *cf, unsigned shb_idx, char **comments)
{
wtap_block_t shb_inf;
gchar *shb_comment;
shb_inf = wtap_file_get_shb(cf->provider.wth, shb_idx);
if (shb_inf == NULL) {
/* Shouldn't happen. XXX: Report it if it does? */
return;
}
unsigned n_comments = g_strv_length(comments);
unsigned i;
char* comment;
for (i = 0; i < n_comments; i++) {
comment = comments[i];
if (wtap_block_get_nth_string_option_value(shb_inf, OPT_COMMENT, i, &shb_comment) != WTAP_OPTTYPE_SUCCESS) {
/* There's no comment - add one. */
wtap_block_add_string_option_owned(shb_inf, OPT_COMMENT, comment);
cf->unsaved_changes = TRUE;
} else {
/* See if the comment has changed or not */
if (strcmp(shb_comment, comment) != 0) {
/* The comment has changed, let's update it */
wtap_block_set_nth_string_option_value(shb_inf, OPT_COMMENT, 0, comment, strlen(comment));
cf->unsaved_changes = TRUE;
}
g_free(comment);
}
}
/* We either transferred ownership of the comments or freed them
* above, so free the array of strings but not the strings themselves. */
g_free(comments);
/* If there are extra old comments, remove them. Start at the end. */
for (i = wtap_block_count_option(shb_inf, OPT_COMMENT); i > n_comments; i--) {
wtap_block_remove_nth_option_instance(shb_inf, OPT_COMMENT, i - 1);
cf->unsaved_changes = TRUE;
}
}
/*
* Get the packet block for a packet (record).
* If the block has been edited, it returns the result of the edit,
* otherwise it returns the block from the file.
* NB. Caller must wtap_block_unref() the result when done.
*/
wtap_block_t
cf_get_packet_block(capture_file *cf, const frame_data *fd)
{
/* If this block has been modified, fetch the modified version */
if (fd->has_modified_block)
return wtap_block_ref(cap_file_provider_get_modified_block(&cf->provider, fd));
else {
wtap_rec rec; /* Record metadata */
Buffer buf; /* Record data */
wtap_block_t block;
/* fetch record block */
wtap_rec_init(&rec);
ws_buffer_init(&buf, 1514);
if (!cf_read_record(cf, fd, &rec, &buf))
{ /* XXX, what we can do here? */ }
/* rec.block is owned by the record, steal it before it is gone. */
block = wtap_block_ref(rec.block);
wtap_rec_cleanup(&rec);
ws_buffer_free(&buf);
return block;
}
}
/*
* Update(replace) the block on a capture from a frame
*/
gboolean
cf_set_modified_block(capture_file *cf, frame_data *fd, const wtap_block_t new_block)
{
wtap_block_t pkt_block = cf_get_packet_block(cf, fd);
/* It's possible to further modify the modified block "in place" by doing
* a call to cf_get_packet_block() that returns an already created modified
* block, modifying that, and calling this function.
* If the caller did that, then the block pointers will be equal.
*/
if (pkt_block == new_block) {
/* No need to save anything here, the caller changes went right
* onto the block.
* Unfortunately we don't have a way to know how many comments were
* in the block before the caller modified it, so tell the caller
* it is its responsibility to update the comment count.
*/
return FALSE;
}
else {
if (pkt_block)
cf->packet_comment_count -= wtap_block_count_option(pkt_block, OPT_COMMENT);
if (new_block)
cf->packet_comment_count += wtap_block_count_option(new_block, OPT_COMMENT);
cap_file_provider_set_modified_block(&cf->provider, fd, new_block);
expert_update_comment_count(cf->packet_comment_count);
}
/* Either way, we have unsaved changes. */
wtap_block_unref(pkt_block);
cf->unsaved_changes = TRUE;
return TRUE;
}
/*
* What types of comments does this capture file have?
*/
guint32
cf_comment_types(capture_file *cf)
{
guint32 comment_types = 0;
/*
* Does this file have any sections with at least one comment?
*/
for (guint section_number = 0;
section_number < wtap_file_get_num_shbs(cf->provider.wth);
section_number++) {
wtap_block_t shb_inf;
char *shb_comment;
shb_inf = wtap_file_get_shb(cf->provider.wth, section_number);
/* Try to get the first comment from that SHB. */
if (wtap_block_get_nth_string_option_value(shb_inf, OPT_COMMENT, 0,
&shb_comment) == WTAP_OPTTYPE_SUCCESS) {
/* We succeeded, so this file has at least one section comment. */
comment_types |= WTAP_COMMENT_PER_SECTION;
/* We don't need to search any more. */
break;
}
}
if (cf->packet_comment_count != 0)
comment_types |= WTAP_COMMENT_PER_PACKET;
return comment_types;
}
/*
* Add a resolved address to this file's list of resolved addresses.
*/
gboolean
cf_add_ip_name_from_string(capture_file *cf, const char *addr, const char *name)
{
/*
* XXX - support multiple resolved address lists, and add to the one
* attached to this file?
*/
if (!add_ip_name_from_string(addr, name))
return FALSE;
/* OK, we have unsaved changes. */
cf->unsaved_changes = TRUE;
return TRUE;
}
typedef struct {
wtap_dumper *pdh;
const char *fname;
int file_type;
gboolean export;
} save_callback_args_t;
/*
* Save a capture to a file, in a particular format, saving either
* all packets, all currently-displayed packets, or all marked packets.
*
* Returns TRUE if it succeeds, FALSE otherwise; if it fails, it pops
* up a message box for the failure.
*/
static gboolean
save_record(capture_file *cf, frame_data *fdata, wtap_rec *rec,
Buffer *buf, void *argsp)
{
save_callback_args_t *args = (save_callback_args_t *)argsp;
wtap_rec new_rec;
int err;
gchar *err_info;
wtap_block_t pkt_block;
/* Copy the record information from what was read in from the file. */
new_rec = *rec;
/* Make changes based on anything that the user has done but that
hasn't been saved yet. */
if (fdata->has_modified_block)
pkt_block = cap_file_provider_get_modified_block(&cf->provider, fdata);
else
pkt_block = rec->block;
new_rec.block = pkt_block;
new_rec.block_was_modified = fdata->has_modified_block ? TRUE : FALSE;
if (!nstime_is_zero(&fdata->shift_offset)) {
if (new_rec.presence_flags & WTAP_HAS_TS) {
nstime_add(&new_rec.ts, &fdata->shift_offset);
}
}
/* and save the packet */
if (!wtap_dump(args->pdh, &new_rec, ws_buffer_start_ptr(buf), &err, &err_info)) {
cfile_write_failure_alert_box(NULL, args->fname, err, err_info, fdata->num,
args->file_type);
return FALSE;
}
/* If we are saving (i.e., replacing the current file with the one we're
* writing), then update the frame data to clear the shift offset.
* This keeps us from having to re-read the entire file.
* We could do this in rescan_file(), but
* 1) Ideally we shouldn't have to call rescan_file if all we're doing
* is changing the timestamps, since that shouldn't change the offsets.
* 2) The long term goal is to try to do the offset adjustment here
* instead of using rescan_file, which should be faster (#1257).
*
* If we're exporting to a different file, then don't do that.
*/
if (!args->export && new_rec.presence_flags & WTAP_HAS_TS) {
nstime_set_zero(&fdata->shift_offset);
}
return TRUE;
}
/*
* Can this capture file be written out in any format using Wiretap
* rather than by copying the raw data?
*/
gboolean
cf_can_write_with_wiretap(capture_file *cf)
{
/* We don't care whether we support the comments in this file or not;
if we can't, we'll offer the user the option of discarding the
comments. */
return wtap_dump_can_write(cf->linktypes, 0);
}
/*
* Should we let the user do a save?
*
* We should if:
*
* the file has unsaved changes, and we can save it in some
* format through Wiretap
*
* or
*
* the file is a temporary file and has no unsaved changes (so
* that "saving" it just means copying it).
*
* XXX - we shouldn't allow files to be edited if they can't be saved,
* so cf->unsaved_changes should be true only if the file can be saved.
*
* We don't care whether we support the comments in this file or not;
* if we can't, we'll offer the user the option of discarding the
* comments.
*/
gboolean
cf_can_save(capture_file *cf)
{
if (cf->unsaved_changes && wtap_dump_can_write(cf->linktypes, 0)) {
/* Saved changes, and we can write it out with Wiretap. */
return TRUE;
}
if (cf->is_tempfile && !cf->unsaved_changes) {
/*
* Temporary file with no unsaved changes, so we can just do a
* raw binary copy.
*/
return TRUE;
}
/* Nothing to save. */
return FALSE;
}
/*
* Should we let the user do a "save as"?
*
* That's true if:
*
* we can save it in some format through Wiretap
*
* or
*
* the file is a temporary file and has no unsaved changes (so
* that "saving" it just means copying it).
*
* XXX - we shouldn't allow files to be edited if they can't be saved,
* so cf->unsaved_changes should be true only if the file can be saved.
*
* We don't care whether we support the comments in this file or not;
* if we can't, we'll offer the user the option of discarding the
* comments.
*/
gboolean
cf_can_save_as(capture_file *cf)
{
if (wtap_dump_can_write(cf->linktypes, 0)) {
/* We can write it out with Wiretap. */
return TRUE;
}
if (cf->is_tempfile && !cf->unsaved_changes) {
/*
* Temporary file with no unsaved changes, so we can just do a
* raw binary copy.
*/
return TRUE;
}
/* Nothing to save. */
return FALSE;
}
/*
* Does this file have unsaved data?
*/
gboolean
cf_has_unsaved_data(capture_file *cf)
{
/*
* If this is a temporary file, or a file with unsaved changes, it
* has unsaved data.
*/
return (cf->is_tempfile && cf->count>0) || cf->unsaved_changes;
}
/*
* Quick scan to find packet offsets.
*/
static cf_read_status_t
rescan_file(capture_file *cf, const char *fname, gboolean is_tempfile)
{
wtap_rec rec;
Buffer buf;
int err;
gchar *err_info;
gchar *name_ptr;
gint64 data_offset;
progdlg_t *progbar = NULL;
GTimer *prog_timer = g_timer_new();
gint64 size;
float progbar_val;
gint64 start_time;
gchar status_str[100];
guint32 framenum;
frame_data *fdata;
/* Close the old handle. */
wtap_close(cf->provider.wth);
/* Open the new file. */
/* XXX: this will go through all open_routines for a matching one. But right
now rescan_file() is only used when a file is being saved to a different
format than the original, and the user is not given a choice of which
reader to use (only which format to save it in), so doing this makes
sense for now. (XXX: Now it is also used when saving a changed file,
e.g. comments or time-shifted frames.) */
cf->provider.wth = wtap_open_offline(fname, WTAP_TYPE_AUTO, &err, &err_info, TRUE);
if (cf->provider.wth == NULL) {
cfile_open_failure_alert_box(fname, err, err_info);
return CF_READ_ERROR;
}
/* We're scanning a file whose contents should be the same as what
we had before, so we don't discard dissection state etc.. */
cf->f_datalen = 0;
/* Set the file name because we need it to set the follow stream filter.
XXX - is that still true? We need it for other reasons, though,
in any case. */
if (cf->filename != NULL) {
g_free(cf->filename);
}
cf->filename = g_strdup(fname);
/* Indicate whether it's a permanent or temporary file. */
cf->is_tempfile = is_tempfile;
/* No user changes yet. */
cf->unsaved_changes = FALSE;
cf->cd_t = wtap_file_type_subtype(cf->provider.wth);
if (cf->linktypes != NULL) {
g_array_free(cf->linktypes, TRUE);
}
cf->linktypes = g_array_sized_new(FALSE, FALSE, (guint) sizeof(int), 1);
cf->snap = wtap_snapshot_length(cf->provider.wth);
name_ptr = g_filename_display_basename(cf->filename);
cf_callback_invoke(cf_cb_file_rescan_started, cf);
/* Record the file's compression type.
XXX - do we know this at open time? */
cf->compression_type = wtap_get_compression_type(cf->provider.wth);
/* Find the size of the file. */
size = wtap_file_size(cf->provider.wth, NULL);
g_timer_start(prog_timer);
cf->stop_flag = FALSE;
start_time = g_get_monotonic_time();
framenum = 0;
wtap_rec_init(&rec);
ws_buffer_init(&buf, 1514);
while ((wtap_read(cf->provider.wth, &rec, &buf, &err, &err_info,
&data_offset))) {
framenum++;
fdata = frame_data_sequence_find(cf->provider.frames, framenum);
if (G_LIKELY(fdata != NULL)) {
fdata->file_off = data_offset;
}
if (size >= 0) {
cf->f_datalen = wtap_read_so_far(cf->provider.wth);
/* Create the progress bar if necessary. */
if (progress_is_slow(progbar, prog_timer, size, cf->f_datalen)) {
progbar_val = calc_progbar_val(cf, size, cf->f_datalen, status_str, sizeof(status_str));
progbar = delayed_create_progress_dlg(cf->window, NULL, NULL,
TRUE, &cf->stop_flag, progbar_val);
}
/*
* Update the progress bar, but do it only after PROGBAR_UPDATE_INTERVAL
* has elapsed. Calling update_progress_dlg and packets_bar_update will
* likely trigger UI paint events, which might take a while depending on
* the platform and display. Reset our timer *after* painting.
*/
if (progbar && g_timer_elapsed(prog_timer, NULL) > PROGBAR_UPDATE_INTERVAL) {
progbar_val = calc_progbar_val(cf, size, cf->f_datalen, status_str, sizeof(status_str));
/* update the packet bar content on the first run or frequently on very large files */
update_progress_dlg(progbar, progbar_val, status_str);
compute_elapsed(cf, start_time);
packets_bar_update();
g_timer_start(prog_timer);
}
}
if (cf->stop_flag) {
/* Well, the user decided to abort the rescan. Sadly, as this
isn't a reread, recovering is difficult, so we'll just
close the current capture. */
break;
}
/* Add this packet's link-layer encapsulation type to cf->linktypes, if
it's not already there.
XXX - yes, this is O(N), so if every packet had a different
link-layer encapsulation type, it'd be O(N^2) to read the file, but
there are probably going to be a small number of encapsulation types
in a file. */
if (rec.rec_type == REC_TYPE_PACKET) {
cf_add_encapsulation_type(cf, rec.rec_header.packet_header.pkt_encap);
}
wtap_rec_reset(&rec);
}
wtap_rec_cleanup(&rec);
ws_buffer_free(&buf);
/* Free the display name */
g_free(name_ptr);
/* We're done reading the file; destroy the progress bar if it was created. */
if (progbar != NULL)
destroy_progress_dlg(progbar);
g_timer_destroy(prog_timer);
/* We're done reading sequentially through the file. */
cf->state = FILE_READ_DONE;
/* Close the sequential I/O side, to free up memory it requires. */
wtap_sequential_close(cf->provider.wth);
/* compute the time it took to load the file */
compute_elapsed(cf, start_time);
/* Set the file encapsulation type now; we don't know what it is until
we've looked at all the packets, as we don't know until then whether
there's more than one type (and thus whether it's
WTAP_ENCAP_PER_PACKET). */
cf->lnk_t = wtap_file_encap(cf->provider.wth);
cf_callback_invoke(cf_cb_file_rescan_finished, cf);
if (cf->stop_flag) {
/* Our caller will give up at this point. */
return CF_READ_ABORTED;
}
if (err != 0) {
/* Put up a message box noting that the read failed somewhere along
the line. Don't throw out the stuff we managed to read, though,
if any. */
cfile_read_failure_alert_box(NULL, err, err_info);
return CF_READ_ERROR;
} else
return CF_READ_OK;
}
cf_write_status_t
cf_save_records(capture_file *cf, const char *fname, guint save_format,
wtap_compression_type compression_type,
gboolean discard_comments, gboolean dont_reopen)
{
gchar *err_info;
gchar *fname_new = NULL;
wtap_dumper *pdh;
frame_data *fdata;
addrinfo_lists_t *addr_lists;
guint framenum;
int err;
#ifdef _WIN32
gchar *display_basename;
#endif
enum {
SAVE_WITH_MOVE,
SAVE_WITH_COPY,
SAVE_WITH_WTAP
} how_to_save;
save_callback_args_t callback_args;
callback_args.export = FALSE;
gboolean needs_reload = FALSE;
/* XXX caller should avoid saving the file while a read is pending
* (e.g. by delaying the save action) */
if (cf->read_lock) {
ws_warning("cf_save_records(\"%s\") while the file is being read, potential crash ahead", fname);
}
cf_callback_invoke(cf_cb_file_save_started, (gpointer)fname);
addr_lists = get_addrinfo_list();
if (save_format == cf->cd_t && compression_type == cf->compression_type
&& !discard_comments && !cf->unsaved_changes
&& (wtap_addrinfo_list_empty(addr_lists) || wtap_file_type_subtype_supports_block(save_format, WTAP_BLOCK_NAME_RESOLUTION) == BLOCK_NOT_SUPPORTED)) {
/* We're saving in the format it's already in, and we're not discarding
comments, and there are no changes we have in memory that aren't saved
to the file, and we have no name resolution information to write or
the file format we're saving in doesn't support writing name
resolution information, so we can just move or copy the raw data. */
if (cf->is_tempfile) {
/* The file being saved is a temporary file from a live
capture, so it doesn't need to stay around under that name;
first, try renaming the capture buffer file to the new name.
This acts as a "safe save", in that, if the file already
exists, the existing file will be removed only if the rename
succeeds.
Sadly, on Windows, as we have the current capture file
open, even MoveFileEx() with MOVEFILE_REPLACE_EXISTING
(to cause the rename to remove an existing target), as
done by ws_stdio_rename() (ws_rename() is #defined to
be ws_stdio_rename() on Windows) will fail.
According to the MSDN documentation for CreateFile(), if,
when we open a capture file, we were to directly do a CreateFile(),
opening with FILE_SHARE_DELETE|FILE_SHARE_READ, and then
convert it to a file descriptor with _open_osfhandle(),
that would allow the file to be renamed out from under us.
However, that doesn't work in practice. Perhaps the problem
is that the process doing the rename is the process that
has the file open. */
#ifndef _WIN32
if (ws_rename(cf->filename, fname) == 0) {
/* That succeeded - there's no need to copy the source file. */
how_to_save = SAVE_WITH_MOVE;
} else {
if (errno == EXDEV) {
/* They're on different file systems, so we have to copy the
file. */
how_to_save = SAVE_WITH_COPY;
} else {
/* The rename failed, but not because they're on different
file systems - put up an error message. (Or should we
just punt and try to copy? The only reason why I'd
expect the rename to fail and the copy to succeed would
be if we didn't have permission to remove the file from
the temporary directory, and that might be fixable - but
is it worth requiring the user to go off and fix it?) */
cf_rename_failure_alert_box(fname, errno);
goto fail;
}
}
#else
/* Windows - copy the file to its new location. */
how_to_save = SAVE_WITH_COPY;
#endif
} else {
/* It's a permanent file, so we should copy it, and not remove the
original. */
how_to_save = SAVE_WITH_COPY;
}
if (how_to_save == SAVE_WITH_COPY) {
/* Copy the file, if we haven't moved it. If we're overwriting
an existing file, we do it with a "safe save", by writing
to a new file and, if the write succeeds, renaming the
new file on top of the old file. */
if (file_exists(fname)) {
fname_new = ws_strdup_printf("%s~", fname);
if (!copy_file_binary_mode(cf->filename, fname_new))
goto fail;
} else {
if (!copy_file_binary_mode(cf->filename, fname))
goto fail;
}
}
} else {
/* Either we're saving in a different format or we're saving changes,
such as added, modified, or removed comments, that haven't yet
been written to the underlying file; we can't do that by copying
or moving the capture file, we have to do it by writing the packets
out in Wiretap. */
wtap_dump_params params;
int encap;
how_to_save = SAVE_WITH_WTAP;
wtap_dump_params_init(&params, cf->provider.wth);
/* Determine what file encapsulation type we should use. */
encap = wtap_dump_required_file_encap_type(cf->linktypes);
params.encap = encap;
/* Use the snaplen from cf (XXX - does wtap_dump_params_init handle that?) */
params.snaplen = cf->snap;
if (file_exists(fname)) {
/* We're overwriting an existing file; write out to a new file,
and, if that succeeds, rename the new file on top of the
old file. That makes this a "safe save", so that we don't
lose the old file if we have a problem writing out the new
file. (If the existing file is the current capture file,
we *HAVE* to do that, otherwise we're overwriting the file
from which we're reading the packets that we're writing!) */
fname_new = ws_strdup_printf("%s~", fname);
pdh = wtap_dump_open(fname_new, save_format, compression_type, &params,
&err, &err_info);
} else {
pdh = wtap_dump_open(fname, save_format, compression_type, &params,
&err, &err_info);
}
/* XXX idb_inf is documented to be used until wtap_dump_close. */
g_free(params.idb_inf);
params.idb_inf = NULL;
if (pdh == NULL) {
cfile_dump_open_failure_alert_box(fname, err, err_info, save_format);
goto fail;
}
/* Add address resolution */
wtap_dump_set_addrinfo_list(pdh, addr_lists);
/* Iterate through the list of packets, processing all the packets. */
callback_args.pdh = pdh;
callback_args.fname = fname;
callback_args.file_type = save_format;
switch (process_specified_records(cf, NULL, "Saving", "packets",
TRUE, save_record, &callback_args, TRUE)) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* The user decided to abort the saving.
If we're writing to a temporary file, remove it.
XXX - should we do so even if we're not writing to a
temporary file? */
wtap_dump_close(pdh, NULL, &err, &err_info);
if (fname_new != NULL)
ws_unlink(fname_new);
cf_callback_invoke(cf_cb_file_save_stopped, NULL);
wtap_dump_params_cleanup(&params);
return CF_WRITE_ABORTED;
case PSP_FAILED:
/* Error while saving.
If we're writing to a temporary file, remove it. */
if (fname_new != NULL)
ws_unlink(fname_new);
wtap_dump_close(pdh, NULL, &err, &err_info);
wtap_dump_params_cleanup(&params);
goto fail;
}
if (!wtap_dump_close(pdh, &needs_reload, &err, &err_info)) {
cfile_close_failure_alert_box(fname, err, err_info);
wtap_dump_params_cleanup(&params);
goto fail;
}
wtap_dump_params_cleanup(&params);
}
if (fname_new != NULL) {
/* We wrote out to fname_new, and should rename it on top of
fname. fname_new is now closed, so that should be possible even
on Windows. However, on Windows, we first need to close whatever
file descriptors we have open for fname. */
#ifdef _WIN32
wtap_fdclose(cf->provider.wth);
#endif
/* Now do the rename. */
if (ws_rename(fname_new, fname) == -1) {
/* Well, the rename failed. */
cf_rename_failure_alert_box(fname, errno);
#ifdef _WIN32
/* Attempt to reopen the random file descriptor using the
current file's filename. (At this point, the sequential
file descriptor is closed.) */
if (!wtap_fdreopen(cf->provider.wth, cf->filename, &err)) {
/* Oh, well, we're screwed. */
display_basename = g_filename_display_basename(cf->filename);
simple_error_message_box(
file_open_error_message(err, FALSE), display_basename);
g_free(display_basename);
}
#endif
goto fail;
}
g_free(fname_new);
}
/* If this was a temporary file, and we didn't do the save by doing
a move, so the tempoary file is still around under its old name,
remove it. */
if (cf->is_tempfile && how_to_save != SAVE_WITH_MOVE) {
/* If this fails, there's not much we can do, so just ignore errors. */
ws_unlink(cf->filename);
}
cf_callback_invoke(cf_cb_file_save_finished, NULL);
cf->unsaved_changes = FALSE;
if (!dont_reopen) {
switch (how_to_save) {
case SAVE_WITH_MOVE:
/* We just moved the file, so the wtap structure refers to the
new file, and all the information other than the filename
and the "is temporary" status applies to the new file; just
update that. */
g_free(cf->filename);
cf->filename = g_strdup(fname);
cf->is_tempfile = FALSE;
cf_callback_invoke(cf_cb_file_fast_save_finished, cf);
break;
case SAVE_WITH_COPY:
/* We just copied the file, so all the information other than
the file descriptors, the filename, and the "is temporary"
status applies to the new file; just update that. */
wtap_fdclose(cf->provider.wth);
/* Attempt to reopen the random file descriptor using the
new file's filename. (At this point, the sequential
file descriptor is closed.) */
if (!wtap_fdreopen(cf->provider.wth, fname, &err)) {
cfile_open_failure_alert_box(fname, err, err_info);
cf_close(cf);
} else {
g_free(cf->filename);
cf->filename = g_strdup(fname);
cf->is_tempfile = FALSE;
}
cf_callback_invoke(cf_cb_file_fast_save_finished, cf);
break;
case SAVE_WITH_WTAP:
/* Open and read the file we saved to.
XXX - this is somewhat of a waste; we already have the
packets, all this gets us is updated file type information
(which we could just stuff into "cf"), and having the new
file be the one we have opened and from which we're reading
the data, and it means we have to spend time opening and
reading the file, which could be a significant amount of
time if the file is large.
If the capture-file-writing code were to return the
seek offset of each packet it writes, we could save that
in the frame_data structure for the frame, and just open
the file without reading it again...
...as long as, for gzipped files, the process of writing
out the file *also* generates the information needed to
support fast random access to the compressed file. */
/* rescan_file will cause us to try all open_routines, so
reset cfile's open_type */
cf->open_type = WTAP_TYPE_AUTO;
/* There are cases when SAVE_WITH_WTAP can result in new packets
being written to the file, e.g ERF records
In that case, we need to reload the whole file */
if(needs_reload) {
if (cf_open(cf, fname, WTAP_TYPE_AUTO, FALSE, &err) == CF_OK) {
if (cf_read(cf, /*reloading=*/TRUE) != CF_READ_OK) {
/* The rescan failed; just close the file. Either
a dialog was popped up for the failure, so the
user knows what happened, or they stopped the
rescan, in which case they know what happened. */
/* XXX: This is inconsistent with normal open/reload behaviour. */
cf_close(cf);
}
}
}
else {
if (rescan_file(cf, fname, FALSE) != CF_READ_OK) {
/* The rescan failed; just close the file. Either
a dialog was popped up for the failure, so the
user knows what happened, or they stopped the
rescan, in which case they know what happened. */
cf_close(cf);
}
}
break;
}
/* If we were told to discard the comments, do so. */
if (discard_comments) {
/* Remove SHB comment, if any. */
wtap_write_shb_comment(cf->provider.wth, NULL);
/* remove all user comments */
for (framenum = 1; framenum <= cf->count; framenum++) {
fdata = frame_data_sequence_find(cf->provider.frames, framenum);
// XXX: This also ignores non-comment options like verdict
fdata->has_modified_block = FALSE;
}
if (cf->provider.frames_modified_blocks) {
g_tree_destroy(cf->provider.frames_modified_blocks);
cf->provider.frames_modified_blocks = NULL;
}
cf->packet_comment_count = 0;
}
}
return CF_WRITE_OK;
fail:
if (fname_new != NULL) {
/* We were trying to write to a temporary file; get rid of it if it
exists. (We don't care whether this fails, as, if it fails,
there's not much we can do about it. I guess if it failed for
a reason other than "it doesn't exist", we could report an
error, so the user knows there's a junk file that they might
want to clean up.) */
ws_unlink(fname_new);
g_free(fname_new);
}
cf_callback_invoke(cf_cb_file_save_failed, NULL);
return CF_WRITE_ERROR;
}
cf_write_status_t
cf_export_specified_packets(capture_file *cf, const char *fname,
packet_range_t *range, guint save_format,
wtap_compression_type compression_type)
{
gchar *fname_new = NULL;
int err;
gchar *err_info;
wtap_dumper *pdh;
save_callback_args_t callback_args;
wtap_dump_params params;
int encap;
callback_args.export = TRUE;
packet_range_process_init(range);
/* We're writing out specified packets from the specified capture
file to another file. Even if all captured packets are to be
written, don't special-case the operation - read each packet
and then write it out if it's one of the specified ones. */
wtap_dump_params_init(&params, cf->provider.wth);
/* Determine what file encapsulation type we should use. */
encap = wtap_dump_required_file_encap_type(cf->linktypes);
params.encap = encap;
/* Use the snaplen from cf (XXX - does wtap_dump_params_init handle that?) */
params.snaplen = cf->snap;
if (file_exists(fname)) {
/* We're overwriting an existing file; write out to a new file,
and, if that succeeds, rename the new file on top of the
old file. That makes this a "safe save", so that we don't
lose the old file if we have a problem writing out the new
file. (If the existing file is the current capture file,
we *HAVE* to do that, otherwise we're overwriting the file
from which we're reading the packets that we're writing!) */
fname_new = ws_strdup_printf("%s~", fname);
pdh = wtap_dump_open(fname_new, save_format, compression_type, &params,
&err, &err_info);
} else {
pdh = wtap_dump_open(fname, save_format, compression_type, &params,
&err, &err_info);
}
/* XXX idb_inf is documented to be used until wtap_dump_close. */
g_free(params.idb_inf);
params.idb_inf = NULL;
if (pdh == NULL) {
cfile_dump_open_failure_alert_box(fname, err, err_info, save_format);
goto fail;
}
/* Add address resolution */
wtap_dump_set_addrinfo_list(pdh, get_addrinfo_list());
/* Iterate through the list of packets, processing the packets we were
told to process.
XXX - we've already called "packet_range_process_init(range)", but
"process_specified_records()" will do it again. Fortunately,
that's harmless in this case, as we haven't done anything to
"range" since we initialized it. */
callback_args.pdh = pdh;
callback_args.fname = fname;
callback_args.file_type = save_format;
switch (process_specified_records(cf, range, "Writing", "specified records",
TRUE, save_record, &callback_args, TRUE)) {
case PSP_FINISHED:
/* Completed successfully. */
break;
case PSP_STOPPED:
/* The user decided to abort the saving.
If we're writing to a temporary file, remove it.
XXX - should we do so even if we're not writing to a
temporary file? */
wtap_dump_close(pdh, NULL, &err, &err_info);
if (fname_new != NULL) {
ws_unlink(fname_new);
g_free(fname_new);
}
wtap_dump_params_cleanup(&params);
return CF_WRITE_ABORTED;
break;
case PSP_FAILED:
/* Error while saving. */
wtap_dump_close(pdh, NULL, &err, &err_info);
/*
* We don't report any error from closing; the error that caused
* process_specified_records() to fail has already been reported.
*/
goto fail;
}
if (!wtap_dump_close(pdh, NULL, &err, &err_info)) {
cfile_close_failure_alert_box(fname, err, err_info);
goto fail;
}
if (fname_new != NULL) {
/* We wrote out to fname_new, and should rename it on top of
fname; fname is now closed, so that should be possible even
on Windows. Do the rename. */
if (ws_rename(fname_new, fname) == -1) {
/* Well, the rename failed. */
cf_rename_failure_alert_box(fname, errno);
goto fail;
}
g_free(fname_new);
}
wtap_dump_params_cleanup(&params);
return CF_WRITE_OK;
fail:
if (fname_new != NULL) {
/* We were trying to write to a temporary file; get rid of it if it
exists. (We don't care whether this fails, as, if it fails,
there's not much we can do about it. I guess if it failed for
a reason other than "it doesn't exist", we could report an
error, so the user knows there's a junk file that they might
want to clean up.) */
ws_unlink(fname_new);
g_free(fname_new);
}
wtap_dump_params_cleanup(&params);
return CF_WRITE_ERROR;
}
/*
* XXX - whether we mention the source pathname, the target pathname,
* or both depends on the error and on what we find if we look for
* one or both of them.
*/
static void
cf_rename_failure_alert_box(const char *filename, int err)
{
gchar *display_basename;
display_basename = g_filename_display_basename(filename);
switch (err) {
case ENOENT:
/* XXX - should check whether the source exists and, if not,
report it as the problem and, if so, report the destination
as the problem. */
simple_error_message_box("The path to the file \"%s\" doesn't exist.",
display_basename);
break;
case EACCES:
/* XXX - if we're doing a rename after a safe save, we should
probably say something else. */
simple_error_message_box("You don't have permission to move the capture file to \"%s\".",
display_basename);
break;
default:
/* XXX - this should probably mention both the source and destination
pathnames. */
simple_error_message_box("The file \"%s\" could not be moved: %s.",
display_basename, wtap_strerror(err));
break;
}
g_free(display_basename);
}
/* Reload the current capture file. */
cf_status_t
cf_reload(capture_file *cf)
{
gchar *filename;
gboolean is_tempfile;
cf_status_t cf_status = CF_OK;
int err;
if (cf->read_lock) {
ws_warning("Failing cf_reload(\"%s\") since a read is in progress", cf->filename);
return CF_ERROR;
}
/* If the file could be opened, "cf_open()" calls "cf_close()"
to get rid of state for the old capture file before filling in state
for the new capture file. "cf_close()" will remove the file if
it's a temporary file; we don't want that to happen (for one thing,
it'd prevent subsequent reopens from working). Remember whether it's
a temporary file, mark it as not being a temporary file, and then
reopen it as the type of file it was.
Also, "cf_close()" will free "cf->filename", so we must make
a copy of it first. */
filename = g_strdup(cf->filename);
is_tempfile = cf->is_tempfile;
cf->is_tempfile = FALSE;
if (cf_open(cf, filename, cf->open_type, is_tempfile, &err) == CF_OK) {
switch (cf_read(cf, /*reloading=*/TRUE)) {
case CF_READ_OK:
case CF_READ_ERROR:
/* Just because we got an error, that doesn't mean we were unable
to read any of the file; we handle what we could get from the
file. */
break;
case CF_READ_ABORTED:
/* The user bailed out of re-reading the capture file; the
capture file has been closed. */
break;
}
} else {
/* The open failed, so "cf->is_tempfile" wasn't set to "is_tempfile".
Instead, the file was left open, so we should restore "cf->is_tempfile"
ourselves.
XXX - change the menu? Presumably "cf_open()" will do that;
make sure it does! */
cf->is_tempfile = is_tempfile;
cf_status = CF_ERROR;
}
/* "cf_open()" made a copy of the file name we handed it, so
we should free up our copy. */
g_free(filename);
return cf_status;
}
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