1 /* Reorder the frames from an input dump file, and write to output dump file.
2 * Martin Mathieson and Jakub Jawadzki
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
35 #include <wiretap/wtap.h>
37 #ifndef HAVE_GETOPT_LONG
38 #include "wsutil/wsgetopt.h"
41 #include <wsutil/crash_info.h>
42 #include <wsutil/filesystem.h>
43 #include <wsutil/file_util.h>
44 #include <wsutil/privileges.h>
45 #include <ws_version_info.h>
46 #include <wiretap/wtap_opttypes.h>
49 #include <wsutil/plugins.h>
52 #include <wsutil/report_err.h>
54 #define INVALID_OPTION 1
56 #define OUTPUT_FILE_ERROR 1
58 /* Show command-line usage */
60 print_usage(FILE *output)
62 fprintf(output, "\n");
63 fprintf(output, "Usage: reordercap [options] <infile> <outfile>\n");
64 fprintf(output, "\n");
65 fprintf(output, "Options:\n");
66 fprintf(output, " -n don't write to output file if the input file is ordered.\n");
67 fprintf(output, " -h display this help and exit.\n");
70 /* Remember where this frame was in the file */
71 typedef struct FrameRecord_t {
79 /**************************************************/
82 /* Enable this symbol to see debug output */
83 /* #define REORDER_DEBUG */
86 #define DEBUG_PRINT printf
88 #define DEBUG_PRINT(...)
90 /**************************************************/
94 frame_write(FrameRecord_t *frame, wtap *wth, wtap_dumper *pdh,
95 struct wtap_pkthdr *phdr, Buffer *buf, const char *infile)
100 DEBUG_PRINT("\nDumping frame (offset=%" G_GINT64_MODIFIER "u)\n",
104 /* Re-read the frame from the stored location */
105 if (!wtap_seek_read(wth, frame->offset, phdr, buf, &err, &err_info)) {
107 /* Print a message noting that the read failed somewhere along the line. */
109 "reordercap: An error occurred while re-reading \"%s\": %s.\n",
110 infile, wtap_strerror(err));
111 if (err_info != NULL) {
112 fprintf(stderr, "(%s)\n", err_info);
119 /* Copy, and set length and timestamp from item. */
120 /* TODO: remove when wtap_seek_read() fills in phdr,
121 including time stamps, for all file types */
122 phdr->ts = frame->frame_time;
124 /* Dump frame to outfile */
125 if (!wtap_dump(pdh, phdr, ws_buffer_start_ptr(buf), &err, &err_info)) {
126 fprintf(stderr, "reordercap: Error (%s) writing frame to outfile\n",
128 if (err_info != NULL) {
129 fprintf(stderr, "(%s)\n", err_info);
136 /* Comparing timestamps between 2 frames.
137 negative if (t1 < t2)
139 positive if (t1 > t2)
142 frames_compare(gconstpointer a, gconstpointer b)
144 const FrameRecord_t *frame1 = *(const FrameRecord_t *const *) a;
145 const FrameRecord_t *frame2 = *(const FrameRecord_t *const *) b;
147 const nstime_t *time1 = &frame1->frame_time;
148 const nstime_t *time2 = &frame2->frame_time;
150 return nstime_cmp(time1, time2);
155 * General errors are reported with an console message in reordercap.
158 failure_message(const char *msg_format, va_list ap)
160 fprintf(stderr, "reordercap: ");
161 vfprintf(stderr, msg_format, ap);
162 fprintf(stderr, "\n");
166 /********************************************************************/
168 /********************************************************************/
170 main(int argc, char *argv[])
172 GString *comp_info_str;
173 GString *runtime_info_str;
174 char *init_progfile_dir_error;
176 wtap_dumper *pdh = NULL;
177 struct wtap_pkthdr dump_phdr;
182 const struct wtap_pkthdr *phdr;
183 guint wrong_order_count = 0;
184 gboolean write_output_regardless = TRUE;
186 GArray *shb_hdrs = NULL;
187 wtapng_iface_descriptions_t *idb_inf = NULL;
188 GArray *nrb_hdrs = NULL;
189 int ret = EXIT_SUCCESS;
192 FrameRecord_t *prevFrame = NULL;
195 static const struct option long_options[] = {
196 {"help", no_argument, NULL, 'h'},
197 {"version", no_argument, NULL, 'v'},
204 /* Get the compile-time version information string */
205 comp_info_str = get_compiled_version_info(NULL, NULL);
207 /* Get the run-time version information string */
208 runtime_info_str = get_runtime_version_info(NULL);
210 /* Add it to the information to be reported on a crash. */
211 ws_add_crash_info("Reordercap (Wireshark) %s\n"
216 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
217 g_string_free(comp_info_str, TRUE);
218 g_string_free(runtime_info_str, TRUE);
221 * Get credential information for later use.
223 init_process_policies();
226 * Attempt to get the pathname of the directory containing the
229 init_progfile_dir_error = init_progfile_dir(argv[0], main);
230 if (init_progfile_dir_error != NULL) {
232 "reordercap: Can't get pathname of directory containing the reordercap program: %s.\n",
233 init_progfile_dir_error);
234 g_free(init_progfile_dir_error);
240 /* Register wiretap plugins */
241 init_report_err(failure_message,NULL,NULL,NULL);
243 /* Scan for plugins. This does *not* call their registration routines;
246 Don't report failures to load plugins because most (non-wiretap)
247 plugins *should* fail to load (because we're not linked against
248 libwireshark and dissector plugins need libwireshark). */
249 scan_plugins(DONT_REPORT_LOAD_FAILURE);
251 /* Register all libwiretap plugin modules. */
252 register_all_wiretap_modules();
255 /* Process the options first */
256 while ((opt = getopt_long(argc, argv, "hnv", long_options, NULL)) != -1) {
259 write_output_regardless = FALSE;
262 printf("Reordercap (Wireshark) %s\n"
263 "Reorder timestamps of input file frames into output file.\n"
264 "See https://www.wireshark.org for more information.\n",
265 get_ws_vcs_version_info());
269 comp_info_str = get_compiled_version_info(NULL, NULL);
270 runtime_info_str = get_runtime_version_info(NULL);
271 show_version("Reordercap (Wireshark)", comp_info_str, runtime_info_str);
272 g_string_free(comp_info_str, TRUE);
273 g_string_free(runtime_info_str, TRUE);
277 ret = INVALID_OPTION;
282 /* Remaining args are file names */
283 file_count = argc - optind;
284 if (file_count == 2) {
285 infile = argv[optind];
286 outfile = argv[optind+1];
290 ret = INVALID_OPTION;
295 /* TODO: if reordercap is ever changed to give the user a choice of which
296 open_routine reader to use, then the following needs to change. */
297 wth = wtap_open_offline(infile, WTAP_TYPE_AUTO, &err, &err_info, TRUE);
299 fprintf(stderr, "reordercap: Can't open %s: %s\n", infile,
301 if (err_info != NULL) {
302 fprintf(stderr, "(%s)\n", err_info);
308 DEBUG_PRINT("file_type_subtype is %d\n", wtap_file_type_subtype(wth));
310 shb_hdrs = wtap_file_get_shb_for_new_file(wth);
311 idb_inf = wtap_file_get_idb_info(wth);
312 nrb_hdrs = wtap_file_get_nrb_for_new_file(wth);
314 /* Open outfile (same filetype/encap as input file) */
315 if (strcmp(outfile, "-") == 0) {
316 pdh = wtap_dump_open_stdout_ng(wtap_file_type_subtype(wth), wtap_file_encap(wth),
317 65535, FALSE, shb_hdrs, idb_inf, nrb_hdrs, &err);
318 outfile = "standard output";
320 pdh = wtap_dump_open_ng(outfile, wtap_file_type_subtype(wth), wtap_file_encap(wth),
321 65535, FALSE, shb_hdrs, idb_inf, nrb_hdrs, &err);
327 fprintf(stderr, "reordercap: Failed to open output file: (%s) - error %s\n",
328 outfile, wtap_strerror(err));
329 wtap_block_array_free(shb_hdrs);
330 wtap_block_array_free(nrb_hdrs);
331 ret = OUTPUT_FILE_ERROR;
335 /* Allocate the array of frame pointers. */
336 frames = g_ptr_array_new();
338 /* Read each frame from infile */
339 while (wtap_read(wth, &err, &err_info, &data_offset)) {
340 FrameRecord_t *newFrameRecord;
342 phdr = wtap_phdr(wth);
344 newFrameRecord = g_slice_new(FrameRecord_t);
345 newFrameRecord->num = frames->len + 1;
346 newFrameRecord->offset = data_offset;
347 if (phdr->presence_flags & WTAP_HAS_TS) {
348 newFrameRecord->frame_time = phdr->ts;
350 nstime_set_unset(&newFrameRecord->frame_time);
353 if (prevFrame && frames_compare(&newFrameRecord, &prevFrame) < 0) {
357 g_ptr_array_add(frames, newFrameRecord);
358 prevFrame = newFrameRecord;
361 /* Print a message noting that the read failed somewhere along the line. */
363 "reordercap: An error occurred while reading \"%s\": %s.\n",
364 infile, wtap_strerror(err));
365 if (err_info != NULL) {
366 fprintf(stderr, "(%s)\n", err_info);
371 printf("%u frames, %u out of order\n", frames->len, wrong_order_count);
373 /* Sort the frames */
374 if (wrong_order_count > 0) {
375 g_ptr_array_sort(frames, frames_compare);
378 /* Write out each sorted frame in turn */
379 wtap_phdr_init(&dump_phdr);
380 ws_buffer_init(&buf, 1500);
381 for (i = 0; i < frames->len; i++) {
382 FrameRecord_t *frame = (FrameRecord_t *)frames->pdata[i];
384 /* Avoid writing if already sorted and configured to */
385 if (write_output_regardless || (wrong_order_count > 0)) {
386 frame_write(frame, wth, pdh, &dump_phdr, &buf, infile);
388 g_slice_free(FrameRecord_t, frame);
390 wtap_phdr_cleanup(&dump_phdr);
391 ws_buffer_free(&buf);
393 if (!write_output_regardless && (wrong_order_count == 0)) {
394 printf("Not writing output file because input file is already in order.\n");
397 /* Free the whole array */
398 g_ptr_array_free(frames, TRUE);
401 if (!wtap_dump_close(pdh, &err)) {
402 fprintf(stderr, "reordercap: Error closing %s: %s\n", outfile,
404 wtap_block_array_free(shb_hdrs);
405 wtap_block_array_free(nrb_hdrs);
406 ret = OUTPUT_FILE_ERROR;
409 wtap_block_array_free(shb_hdrs);
410 wtap_block_array_free(nrb_hdrs);
412 /* Finally, close infile and release resources. */
425 * Editor modelines - http://www.wireshark.org/tools/modelines.html
430 * indent-tabs-mode: nil
433 * vi: set shiftwidth=4 tabstop=8 expandtab:
434 * :indentSize=4:tabSize=8:noTabs=true: