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.
36 #include <zlib.h> /* to get the libz version number */
39 #include <wiretap/wtap.h>
41 #ifndef HAVE_GETOPT_LONG
42 #include "wsutil/wsgetopt.h"
45 #include <wsutil/crash_info.h>
46 #include <wsutil/file_util.h>
47 #include <wsutil/ws_diag_control.h>
48 #include <wsutil/ws_version_info.h>
50 /* Show command-line usage */
52 print_usage(FILE *output)
54 fprintf(output, "\n");
55 fprintf(output, "Usage: reordercap [options] <infile> <outfile>\n");
56 fprintf(output, "\n");
57 fprintf(output, "Options:\n");
58 fprintf(output, " -n don't write to output file if the input file is ordered.\n");
59 fprintf(output, " -h display this help and exit.\n");
62 /* Remember where this frame was in the file */
63 typedef struct FrameRecord_t {
71 /**************************************************/
74 /* Enable this symbol to see debug output */
75 /* #define REORDER_DEBUG */
78 #define DEBUG_PRINT printf
80 #define DEBUG_PRINT(...)
82 /**************************************************/
86 frame_write(FrameRecord_t *frame, wtap *wth, wtap_dumper *pdh,
87 struct wtap_pkthdr *phdr, Buffer *buf, const char *infile)
92 DEBUG_PRINT("\nDumping frame (offset=%" G_GINT64_MODIFIER "u)\n",
96 /* Re-read the frame from the stored location */
97 if (!wtap_seek_read(wth, frame->offset, phdr, buf, &err, &err_info)) {
99 /* Print a message noting that the read failed somewhere along the line. */
101 "reordercap: An error occurred while re-reading \"%s\": %s.\n",
102 infile, wtap_strerror(err));
103 if (err_info != NULL) {
104 fprintf(stderr, "(%s)\n", err_info);
111 /* Copy, and set length and timestamp from item. */
112 /* TODO: remove when wtap_seek_read() fills in phdr,
113 including time stamps, for all file types */
114 phdr->ts = frame->frame_time;
116 /* Dump frame to outfile */
117 if (!wtap_dump(pdh, phdr, ws_buffer_start_ptr(buf), &err, &err_info)) {
118 fprintf(stderr, "reordercap: Error (%s) writing frame to outfile\n",
120 if (err_info != NULL) {
121 fprintf(stderr, "(%s)\n", err_info);
128 /* Comparing timestamps between 2 frames.
129 negative if (t1 < t2)
131 positive if (t1 > t2)
134 frames_compare(gconstpointer a, gconstpointer b)
136 const FrameRecord_t *frame1 = *(const FrameRecord_t *const *) a;
137 const FrameRecord_t *frame2 = *(const FrameRecord_t *const *) b;
139 const nstime_t *time1 = &frame1->frame_time;
140 const nstime_t *time2 = &frame2->frame_time;
142 return nstime_cmp(time1, time2);
146 get_reordercap_compiled_info(GString *str)
149 g_string_append(str, ", ");
151 g_string_append(str, "with libz ");
153 g_string_append(str, ZLIB_VERSION);
154 #else /* ZLIB_VERSION */
155 g_string_append(str, "(version unknown)");
156 #endif /* ZLIB_VERSION */
157 #else /* HAVE_LIBZ */
158 g_string_append(str, "without libz");
159 #endif /* HAVE_LIBZ */
163 get_reordercap_runtime_info(GString *str)
166 #if defined(HAVE_LIBZ) && !defined(_WIN32)
167 g_string_append_printf(str, ", with libz %s", zlibVersion());
171 /********************************************************************/
173 /********************************************************************/
175 main(int argc, char *argv[])
177 GString *comp_info_str;
178 GString *runtime_info_str;
180 wtap_dumper *pdh = NULL;
181 struct wtap_pkthdr dump_phdr;
186 const struct wtap_pkthdr *phdr;
187 guint wrong_order_count = 0;
188 gboolean write_output_regardless = TRUE;
190 wtapng_section_t *shb_hdr = NULL;
191 wtapng_iface_descriptions_t *idb_inf = NULL;
192 wtapng_name_res_t *nrb_hdr = NULL;
195 FrameRecord_t *prevFrame = NULL;
198 static const struct option long_options[] = {
199 {"help", no_argument, NULL, 'h'},
200 {"version", no_argument, NULL, 'v'},
207 /* Get the compile-time version information string */
208 comp_info_str = get_compiled_version_info(NULL, get_reordercap_compiled_info);
210 /* Get the run-time version information string */
211 runtime_info_str = get_runtime_version_info(get_reordercap_runtime_info);
213 /* Add it to the information to be reported on a crash. */
214 ws_add_crash_info("Reordercap (Wireshark) %s\n"
219 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
221 /* Process the options first */
222 while ((opt = getopt_long(argc, argv, "hnv", long_options, NULL)) != -1) {
225 write_output_regardless = FALSE;
228 printf("Reordercap (Wireshark) %s\n"
229 "Reorder timestamps of input file frames into output file.\n"
230 "See https://www.wireshark.org for more information.\n",
231 get_ws_vcs_version_info());
235 show_version("Reordercap (Wireshark)", comp_info_str, runtime_info_str);
236 g_string_free(comp_info_str, TRUE);
237 g_string_free(runtime_info_str, TRUE);
245 /* Remaining args are file names */
246 file_count = argc - optind;
247 if (file_count == 2) {
248 infile = argv[optind];
249 outfile = argv[optind+1];
257 /* TODO: if reordercap is ever changed to give the user a choice of which
258 open_routine reader to use, then the following needs to change. */
259 wth = wtap_open_offline(infile, WTAP_TYPE_AUTO, &err, &err_info, TRUE);
261 fprintf(stderr, "reordercap: Can't open %s: %s\n", infile,
263 if (err_info != NULL) {
264 fprintf(stderr, "(%s)\n", err_info);
269 DEBUG_PRINT("file_type_subtype is %d\n", wtap_file_type_subtype(wth));
271 shb_hdr = wtap_file_get_shb_for_new_file(wth);
272 idb_inf = wtap_file_get_idb_info(wth);
273 nrb_hdr = wtap_file_get_nrb_for_new_file(wth);
275 /* Open outfile (same filetype/encap as input file) */
276 if (strcmp(outfile, "-") == 0) {
277 pdh = wtap_dump_open_stdout_ng(wtap_file_type_subtype(wth), wtap_file_encap(wth),
278 65535, FALSE, shb_hdr, idb_inf, nrb_hdr, &err);
279 outfile = "standard output";
281 pdh = wtap_dump_open_ng(outfile, wtap_file_type_subtype(wth), wtap_file_encap(wth),
282 65535, FALSE, shb_hdr, idb_inf, nrb_hdr, &err);
288 fprintf(stderr, "reordercap: Failed to open output file: (%s) - error %s\n",
289 outfile, wtap_strerror(err));
290 wtap_free_shb(shb_hdr);
291 wtap_free_nrb(nrb_hdr);
295 /* Allocate the array of frame pointers. */
296 frames = g_ptr_array_new();
298 /* Read each frame from infile */
299 while (wtap_read(wth, &err, &err_info, &data_offset)) {
300 FrameRecord_t *newFrameRecord;
302 phdr = wtap_phdr(wth);
304 newFrameRecord = g_slice_new(FrameRecord_t);
305 newFrameRecord->num = frames->len + 1;
306 newFrameRecord->offset = data_offset;
307 if (phdr->presence_flags & WTAP_HAS_TS) {
308 newFrameRecord->frame_time = phdr->ts;
310 nstime_set_unset(&newFrameRecord->frame_time);
313 if (prevFrame && frames_compare(&newFrameRecord, &prevFrame) < 0) {
317 g_ptr_array_add(frames, newFrameRecord);
318 prevFrame = newFrameRecord;
321 /* Print a message noting that the read failed somewhere along the line. */
323 "reordercap: An error occurred while reading \"%s\": %s.\n",
324 infile, wtap_strerror(err));
325 if (err_info != NULL) {
326 fprintf(stderr, "(%s)\n", err_info);
331 printf("%u frames, %u out of order\n", frames->len, wrong_order_count);
333 /* Sort the frames */
334 if (wrong_order_count > 0) {
335 g_ptr_array_sort(frames, frames_compare);
338 /* Write out each sorted frame in turn */
339 wtap_phdr_init(&dump_phdr);
340 ws_buffer_init(&buf, 1500);
341 for (i = 0; i < frames->len; i++) {
342 FrameRecord_t *frame = (FrameRecord_t *)frames->pdata[i];
344 /* Avoid writing if already sorted and configured to */
345 if (write_output_regardless || (wrong_order_count > 0)) {
346 frame_write(frame, wth, pdh, &dump_phdr, &buf, infile);
348 g_slice_free(FrameRecord_t, frame);
350 wtap_phdr_cleanup(&dump_phdr);
351 ws_buffer_free(&buf);
353 if (!write_output_regardless && (wrong_order_count == 0)) {
354 printf("Not writing output file because input file is already in order!\n");
357 /* Free the whole array */
358 g_ptr_array_free(frames, TRUE);
361 if (!wtap_dump_close(pdh, &err)) {
362 fprintf(stderr, "reordercap: Error closing %s: %s\n", outfile,
364 wtap_free_shb(shb_hdr);
365 wtap_free_nrb(nrb_hdr);
368 wtap_free_shb(shb_hdr);
369 wtap_free_nrb(nrb_hdr);
371 /* Finally, close infile */
378 * Editor modelines - http://www.wireshark.org/tools/modelines.html
383 * indent-tabs-mode: nil
386 * vi: set shiftwidth=4 tabstop=8 expandtab:
387 * :indentSize=4:tabSize=8:noTabs=true: