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.
40 #include <zlib.h> /* to get the libz version number */
45 #ifndef HAVE_GETOPT_LONG
46 #include "wsutil/wsgetopt.h"
49 #include <wsutil/file_util.h>
50 #include <wsutil/crash_info.h>
51 #include <wsutil/ws_version_info.h>
53 #include "version_info.h"
55 /* Show command-line usage */
57 print_usage(FILE *output)
59 fprintf(output, "\n");
60 fprintf(output, "Usage: reordercap [options] <infile> <outfile>\n");
61 fprintf(output, "\n");
62 fprintf(output, "Options:\n");
63 fprintf(output, " -n don't write to output file if the input file is ordered.\n");
64 fprintf(output, " -h display this help and exit.\n");
67 /* Remember where this frame was in the file */
68 typedef struct FrameRecord_t {
76 /**************************************************/
79 /* Enable this symbol to see debug output */
80 /* #define REORDER_DEBUG */
83 #define DEBUG_PRINT printf
85 #define DEBUG_PRINT(...)
87 /**************************************************/
91 frame_write(FrameRecord_t *frame, wtap *wth, wtap_dumper *pdh,
92 struct wtap_pkthdr *phdr, Buffer *buf, const char *infile)
97 DEBUG_PRINT("\nDumping frame (offset=%" G_GINT64_MODIFIER "u)\n",
101 /* Re-read the frame from the stored location */
102 if (!wtap_seek_read(wth, frame->offset, phdr, buf, &err, &err_info)) {
104 /* Print a message noting that the read failed somewhere along the line. */
106 "reordercap: An error occurred while re-reading \"%s\": %s.\n",
107 infile, wtap_strerror(err));
108 if (err_info != NULL) {
109 fprintf(stderr, "(%s)\n", err_info);
116 /* Copy, and set length and timestamp from item. */
117 /* TODO: remove when wtap_seek_read() fills in phdr,
118 including time stamps, for all file types */
119 phdr->ts = frame->time;
121 /* Dump frame to outfile */
122 if (!wtap_dump(pdh, phdr, ws_buffer_start_ptr(buf), &err, &err_info)) {
123 fprintf(stderr, "reordercap: Error (%s) writing frame to outfile\n",
125 if (err_info != NULL) {
126 fprintf(stderr, "(%s)\n", err_info);
133 /* Comparing timestamps between 2 frames.
134 negative if (t1 < t2)
136 positive if (t1 > t2)
139 frames_compare(gconstpointer a, gconstpointer b)
141 const FrameRecord_t *frame1 = *(const FrameRecord_t *const *) a;
142 const FrameRecord_t *frame2 = *(const FrameRecord_t *const *) b;
144 const nstime_t *time1 = &frame1->time;
145 const nstime_t *time2 = &frame2->time;
147 return nstime_cmp(time1, time2);
151 get_reordercap_compiled_info(GString *str)
154 g_string_append(str, ", ");
156 g_string_append(str, "with libz ");
158 g_string_append(str, ZLIB_VERSION);
159 #else /* ZLIB_VERSION */
160 g_string_append(str, "(version unknown)");
161 #endif /* ZLIB_VERSION */
162 #else /* HAVE_LIBZ */
163 g_string_append(str, "without libz");
164 #endif /* HAVE_LIBZ */
168 get_reordercap_runtime_info(GString *str)
171 #if defined(HAVE_LIBZ) && !defined(_WIN32)
172 g_string_append_printf(str, ", with libz %s", zlibVersion());
176 /********************************************************************/
178 /********************************************************************/
180 main(int argc, char *argv[])
182 GString *comp_info_str;
183 GString *runtime_info_str;
185 wtap_dumper *pdh = NULL;
186 struct wtap_pkthdr dump_phdr;
191 const struct wtap_pkthdr *phdr;
192 guint wrong_order_count = 0;
193 gboolean write_output_regardless = TRUE;
195 wtapng_section_t *shb_hdr;
196 wtapng_iface_descriptions_t *idb_inf;
199 FrameRecord_t *prevFrame = NULL;
202 static const struct option long_options[] = {
203 {(char *)"help", no_argument, NULL, 'h'},
204 {(char *)"version", no_argument, NULL, 'v'},
211 /* Assemble the compile-time version information string */
212 comp_info_str = g_string_new("Compiled ");
213 get_compiled_version_info(comp_info_str, NULL, get_reordercap_compiled_info);
215 /* Assemble the run-time version information string */
216 runtime_info_str = g_string_new("Running ");
217 get_runtime_version_info(runtime_info_str, get_reordercap_runtime_info);
219 /* Add it to the information to be reported on a crash. */
220 ws_add_crash_info("Reordercap (Wireshark) %s\n"
225 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
227 /* Process the options first */
228 while ((opt = getopt_long(argc, argv, "hnv", long_options, NULL)) != -1) {
231 write_output_regardless = FALSE;
234 printf("Reordercap (Wireshark) %s\n"
235 "Reorder timestamps of input file frames into output file.\n"
236 "See http://www.wireshark.org for more information.\n",
237 get_ws_vcs_version_info());
241 show_version("Reordercap (Wireshark)", comp_info_str, runtime_info_str);
242 g_string_free(comp_info_str, TRUE);
243 g_string_free(runtime_info_str, TRUE);
251 /* Remaining args are file names */
252 file_count = argc - optind;
253 if (file_count == 2) {
254 infile = argv[optind];
255 outfile = argv[optind+1];
263 /* TODO: if reordercap is ever changed to give the user a choice of which
264 open_routine reader to use, then the following needs to change. */
265 wth = wtap_open_offline(infile, WTAP_TYPE_AUTO, &err, &err_info, TRUE);
267 fprintf(stderr, "reordercap: Can't open %s: %s\n", infile,
269 if (err_info != NULL) {
270 fprintf(stderr, "(%s)\n", err_info);
275 DEBUG_PRINT("file_type_subtype is %u\n", wtap_file_type_subtype(wth));
277 shb_hdr = wtap_file_get_shb_info(wth);
278 idb_inf = wtap_file_get_idb_info(wth);
280 /* Open outfile (same filetype/encap as input file) */
281 pdh = wtap_dump_open_ng(outfile, wtap_file_type_subtype(wth), wtap_file_encap(wth),
282 65535, FALSE, shb_hdr, idb_inf, &err);
285 fprintf(stderr, "reordercap: Failed to open output file: (%s) - error %s\n",
286 outfile, wtap_strerror(err));
291 /* Allocate the array of frame pointers. */
292 frames = g_ptr_array_new();
294 /* Read each frame from infile */
295 while (wtap_read(wth, &err, &err_info, &data_offset)) {
296 FrameRecord_t *newFrameRecord;
298 phdr = wtap_phdr(wth);
300 newFrameRecord = g_slice_new(FrameRecord_t);
301 newFrameRecord->num = frames->len + 1;
302 newFrameRecord->offset = data_offset;
303 if (phdr->presence_flags & WTAP_HAS_TS) {
304 newFrameRecord->time = phdr->ts;
306 nstime_set_unset(&newFrameRecord->time);
309 if (prevFrame && frames_compare(&newFrameRecord, &prevFrame) < 0) {
313 g_ptr_array_add(frames, newFrameRecord);
314 prevFrame = newFrameRecord;
317 /* Print a message noting that the read failed somewhere along the line. */
319 "reordercap: An error occurred while reading \"%s\": %s.\n",
320 infile, wtap_strerror(err));
321 if (err_info != NULL) {
322 fprintf(stderr, "(%s)\n", err_info);
327 printf("%u frames, %u out of order\n", frames->len, wrong_order_count);
329 /* Sort the frames */
330 if (wrong_order_count > 0) {
331 g_ptr_array_sort(frames, frames_compare);
334 /* Write out each sorted frame in turn */
335 wtap_phdr_init(&dump_phdr);
336 ws_buffer_init(&buf, 1500);
337 for (i = 0; i < frames->len; i++) {
338 FrameRecord_t *frame = (FrameRecord_t *)frames->pdata[i];
340 /* Avoid writing if already sorted and configured to */
341 if (write_output_regardless || (wrong_order_count > 0)) {
342 frame_write(frame, wth, pdh, &dump_phdr, &buf, infile);
344 g_slice_free(FrameRecord_t, frame);
346 wtap_phdr_cleanup(&dump_phdr);
347 ws_buffer_free(&buf);
349 if (!write_output_regardless && (wrong_order_count == 0)) {
350 printf("Not writing output file because input file is already in order!\n");
353 /* Free the whole array */
354 g_ptr_array_free(frames, TRUE);
357 if (!wtap_dump_close(pdh, &err)) {
358 fprintf(stderr, "reordercap: Error closing %s: %s\n", outfile,
365 /* Finally, close infile */
372 * Editor modelines - http://www.wireshark.org/tools/modelines.html
377 * indent-tabs-mode: nil
380 * vi: set shiftwidth=4 tabstop=8 expandtab:
381 * :indentSize=4:tabSize=8:noTabs=true: