1 /* Combine dump files, either by appending or by merging by timestamp
3 * Wireshark - Network traffic analyzer
4 * By Gerald Combs <gerald@wireshark.org>
5 * Copyright 1998 Gerald Combs
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 * Mergecap written by Scott Renfro <scott@renfro.org> based on
22 * editcap by Richard Sharpe and Guy Harris
38 #include <zlib.h> /* to get the libz version number */
44 #ifndef HAVE_GETOPT_LONG
45 #include <wsutil/wsgetopt.h>
48 #include <wsutil/clopts_common.h>
49 #include <wsutil/cmdarg_err.h>
50 #include <wsutil/crash_info.h>
51 #include <wsutil/file_util.h>
52 #include <wsutil/strnatcmp.h>
53 #include <wsutil/ws_diag_control.h>
54 #include <wsutil/ws_version_info.h>
56 #include <wiretap/merge.h>
57 #include <wiretap/pcap-encap.h>
60 #include <wsutil/unicode-utils.h>
67 print_usage(FILE *output)
69 fprintf(output, "\n");
70 fprintf(output, "Usage: mergecap [options] -w <outfile>|- <infile> [<infile> ...]\n");
71 fprintf(output, "\n");
72 fprintf(output, "Output:\n");
73 fprintf(output, " -a concatenate rather than merge files.\n");
74 fprintf(output, " default is to merge based on frame timestamps.\n");
75 fprintf(output, " -s <snaplen> truncate packets to <snaplen> bytes of data.\n");
76 fprintf(output, " -w <outfile>|- set the output filename to <outfile> or '-' for stdout.\n");
77 fprintf(output, " -F <capture type> set the output file type; default is pcapng.\n");
78 fprintf(output, " an empty \"-F\" option will list the file types.\n");
79 fprintf(output, " -I <IDB merge mode> set the merge mode for Interface Description Blocks; default is 'all'.\n");
80 fprintf(output, " an empty \"-I\" option will list the merge modes.\n");
81 fprintf(output, "\n");
82 fprintf(output, "Miscellaneous:\n");
83 fprintf(output, " -h display this help and exit.\n");
84 fprintf(output, " -v verbose output.\n");
88 * Report an error in command-line arguments.
91 mergecap_cmdarg_err(const char *fmt, va_list ap)
93 fprintf(stderr, "mergecap: ");
94 vfprintf(stderr, fmt, ap);
95 fprintf(stderr, "\n");
99 * Report additional information for an error in command-line arguments.
102 mergecap_cmdarg_err_cont(const char *fmt, va_list ap)
104 vfprintf(stderr, fmt, ap);
105 fprintf(stderr, "\n");
109 const char *sstr; /* The short string */
110 const char *lstr; /* The long string */
114 string_compare(gconstpointer a, gconstpointer b)
116 return strcmp(((const struct string_elem *)a)->sstr,
117 ((const struct string_elem *)b)->sstr);
121 string_elem_print(gpointer data, gpointer not_used _U_)
123 fprintf(stderr, " %s - %s\n", ((struct string_elem *)data)->sstr,
124 ((struct string_elem *)data)->lstr);
128 list_capture_types(void) {
130 struct string_elem *captypes;
133 captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
135 fprintf(stderr, "mergecap: The available capture file types for the \"-F\" flag are:\n");
136 for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
137 if (wtap_dump_can_open(i)) {
138 captypes[i].sstr = wtap_file_type_subtype_short_string(i);
139 captypes[i].lstr = wtap_file_type_subtype_string(i);
140 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
143 g_slist_foreach(list, string_elem_print, NULL);
149 list_idb_merge_modes(void) {
152 fprintf(stderr, "mergecap: The available IDB merge modes for the \"-I\" flag are:\n");
153 for (i = 0; i < IDB_MERGE_MODE_MAX; i++) {
154 fprintf(stderr, " %s\n", merge_idb_merge_mode_to_string(i));
159 get_mergecap_compiled_info(GString *str)
162 g_string_append(str, ", ");
164 g_string_append(str, "with libz ");
166 g_string_append(str, ZLIB_VERSION);
167 #else /* ZLIB_VERSION */
168 g_string_append(str, "(version unknown)");
169 #endif /* ZLIB_VERSION */
170 #else /* HAVE_LIBZ */
171 g_string_append(str, "without libz");
172 #endif /* HAVE_LIBZ */
176 get_mergecap_runtime_info(GString *str)
179 #if defined(HAVE_LIBZ) && !defined(_WIN32)
180 g_string_append_printf(str, ", with libz %s", zlibVersion());
186 merge_callback(merge_event event, int num,
187 const merge_in_file_t in_files[], const guint in_file_count,
194 case MERGE_EVENT_INPUT_FILES_OPENED:
195 for (i = 0; i < in_file_count; i++) {
196 fprintf(stderr, "mergecap: %s is type %s.\n", in_files[i].filename,
197 wtap_file_type_subtype_string(wtap_file_type_subtype(in_files[i].wth)));
201 case MERGE_EVENT_FRAME_TYPE_SELECTED:
202 /* for this event, num = frame_type */
203 if (num == WTAP_ENCAP_PER_PACKET) {
205 * Find out why we had to choose WTAP_ENCAP_PER_PACKET.
207 int first_frame_type, this_frame_type;
209 first_frame_type = wtap_file_encap(in_files[0].wth);
210 for (i = 1; i < in_file_count; i++) {
211 this_frame_type = wtap_file_encap(in_files[i].wth);
212 if (first_frame_type != this_frame_type) {
213 fprintf(stderr, "mergecap: multiple frame encapsulation types detected\n");
214 fprintf(stderr, " defaulting to WTAP_ENCAP_PER_PACKET\n");
215 fprintf(stderr, " %s had type %s (%s)\n",
216 in_files[0].filename,
217 wtap_encap_string(first_frame_type),
218 wtap_encap_short_string(first_frame_type));
219 fprintf(stderr, " %s had type %s (%s)\n",
220 in_files[i].filename,
221 wtap_encap_string(this_frame_type),
222 wtap_encap_short_string(this_frame_type));
227 fprintf(stderr, "mergecap: selected frame_type %s (%s)\n",
228 wtap_encap_string(num),
229 wtap_encap_short_string(num));
232 case MERGE_EVENT_READY_TO_MERGE:
233 fprintf(stderr, "mergecap: ready to merge records\n");
236 case MERGE_EVENT_PACKET_WAS_READ:
237 /* for this event, num = count */
238 fprintf(stderr, "Record: %d\n", num);
241 case MERGE_EVENT_DONE:
242 fprintf(stderr, "mergecap: merging complete\n");
246 /* false = do not stop merging */
252 main(int argc, char *argv[])
254 GString *comp_info_str;
255 GString *runtime_info_str;
258 static const struct option long_options[] = {
259 {(char *)"help", no_argument, NULL, 'h'},
260 {(char *)"version", no_argument, NULL, 'V'},
264 gboolean do_append = FALSE;
265 gboolean verbose = FALSE;
266 int in_file_count = 0;
268 #ifdef PCAP_NG_DEFAULT
269 int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcap format */
271 int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcapng format */
275 gchar *err_info = NULL;
277 char *out_filename = NULL;
279 idb_merge_mode mode = IDB_MERGE_MODE_MAX;
280 gboolean use_stdout = FALSE;
281 merge_progress_callback_t cb;
283 cmdarg_err_init(mergecap_cmdarg_err, mergecap_cmdarg_err_cont);
286 arg_list_utf_16to8(argc, argv);
287 create_app_running_mutex();
290 /* Get the compile-time version information string */
291 comp_info_str = get_compiled_version_info(NULL, get_mergecap_compiled_info);
293 /* Get the run-time version information string */
294 runtime_info_str = get_runtime_version_info(get_mergecap_runtime_info);
296 /* Add it to the information to be reported on a crash. */
297 ws_add_crash_info("Mergecap (Wireshark) %s\n"
302 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
304 /* Process the options first */
305 while ((opt = getopt_long(argc, argv, "aF:hI:s:vVw:", long_options, NULL)) != -1) {
309 do_append = !do_append;
313 file_type = wtap_short_string_to_file_type_subtype(optarg);
315 fprintf(stderr, "mergecap: \"%s\" isn't a valid capture file type\n",
317 list_capture_types();
323 printf("Mergecap (Wireshark) %s\n"
324 "Merge two or more capture files into one.\n"
325 "See https://www.wireshark.org for more information.\n",
326 get_ws_vcs_version_info());
332 mode = merge_string_to_idb_merge_mode(optarg);
333 if (mode == IDB_MERGE_MODE_MAX) {
334 fprintf(stderr, "mergecap: \"%s\" isn't a valid IDB merge mode\n",
336 list_idb_merge_modes();
342 snaplen = get_positive_int(optarg, "snapshot length");
350 show_version("Mergecap (Wireshark)", comp_info_str, runtime_info_str);
351 g_string_free(comp_info_str, TRUE);
352 g_string_free(runtime_info_str, TRUE);
357 out_filename = optarg;
360 case '?': /* Bad options if GNU getopt */
363 list_capture_types();
366 list_idb_merge_modes();
376 cb.callback_func = merge_callback;
379 /* check for proper args; at a minimum, must have an output
380 * filename and one input file
382 in_file_count = argc - optind;
384 fprintf(stderr, "mergecap: an output filename must be set with -w\n");
385 fprintf(stderr, " run with -h for help\n");
388 if (in_file_count < 1) {
389 fprintf(stderr, "mergecap: No input files were specified\n");
393 /* setting IDB merge mode must use PCAPNG output */
394 if (mode != IDB_MERGE_MODE_MAX && file_type != WTAP_FILE_TYPE_SUBTYPE_PCAPNG) {
395 fprintf(stderr, "The IDB merge mode can only be used with PCAPNG output format\n");
399 /* if they didn't set IDB merge mode, set it to our default */
400 if (mode == IDB_MERGE_MODE_MAX) {
401 mode = IDB_MERGE_MODE_ALL_SAME;
404 /* open the outfile */
405 if (strncmp(out_filename, "-", 2) == 0) {
406 /* use stdout as the outfile */
408 out_fd = 1 /*stdout*/;
410 /* open the outfile */
411 out_fd = ws_open(out_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
413 fprintf(stderr, "mergecap: Couldn't open output file %s: %s\n",
414 out_filename, g_strerror(errno));
419 /* merge the files */
420 status = merge_files(out_fd, out_filename, file_type,
421 (const char *const *) &argv[optind], in_file_count,
422 do_append, mode, snaplen, "mergecap", verbose ? &cb : NULL,
423 &err, &err_info, &err_fileno);
429 case MERGE_USER_ABORTED:
430 /* we don't catch SIGINT/SIGTERM (yet?), so we couldn't have aborted */
434 case MERGE_ERR_CANT_OPEN_INFILE:
435 fprintf(stderr, "mergecap: Can't open %s: %s (%s)\n", argv[optind + err_fileno],
436 wtap_strerror(err), err_info ? err_info : "no more information");
439 case MERGE_ERR_CANT_OPEN_OUTFILE:
440 fprintf(stderr, "mergecap: Can't open or create %s: %s\n", out_filename,
446 case MERGE_ERR_CANT_READ_INFILE: /* fall through */
447 case MERGE_ERR_BAD_PHDR_INTERFACE_ID:
448 case MERGE_ERR_CANT_WRITE_OUTFILE:
449 case MERGE_ERR_CANT_CLOSE_OUTFILE:
451 fprintf(stderr, "mergecap: %s\n", err_info ? err_info : "unknown error");
457 return (status == MERGE_OK) ? 0 : 2;
461 * Editor modelines - http://www.wireshark.org/tools/modelines.html
466 * indent-tabs-mode: nil
469 * vi: set shiftwidth=2 tabstop=8 expandtab:
470 * :indentSize=2:tabSize=8:noTabs=true: