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
37 #ifdef HAVE_SYS_TIME_H
45 #include <wsutil/wsgetopt.h>
48 #include <wsutil/strnatcmp.h>
49 #include <wsutil/file_util.h>
51 #include <wiretap/merge.h>
60 #include <wsutil/unicode-utils.h>
64 get_natural_int(const char *string, const char *name)
69 number = strtol(string, &p, 10);
70 if (p == string || *p != '\0') {
71 fprintf(stderr, "mergecap: The specified %s \"%s\" isn't a decimal number\n",
76 fprintf(stderr, "mergecap: The specified %s is a negative number\n", name);
79 if (number > INT_MAX) {
80 fprintf(stderr, "mergecap: The specified %s is too large (greater than %d)\n",
88 get_positive_int(const char *string, const char *name)
92 number = get_natural_int(string, name);
95 fprintf(stderr, "mergecap: The specified %s is zero\n", name);
106 usage(gboolean is_error)
117 fprintf(output, "Mergecap %s"
119 " (" GITVERSION " from " GITBRANCH ")"
122 fprintf(output, "Merge two or more capture files into one.\n");
123 fprintf(output, "See http://www.wireshark.org for more information.\n");
124 fprintf(output, "\n");
125 fprintf(output, "Usage: mergecap [options] -w <outfile>|- <infile> [<infile> ...]\n");
126 fprintf(output, "\n");
127 fprintf(output, "Output:\n");
128 fprintf(output, " -a concatenate rather than merge files.\n");
129 fprintf(output, " default is to merge based on frame timestamps.\n");
130 fprintf(output, " -s <snaplen> truncate packets to <snaplen> bytes of data.\n");
131 fprintf(output, " -w <outfile>|- set the output filename to <outfile> or '-' for stdout.\n");
132 fprintf(output, " -F <capture type> set the output file type; default is pcapng.\n");
133 fprintf(output, " an empty \"-F\" option will list the file types.\n");
134 fprintf(output, " -T <encap type> set the output file encapsulation type;\n");
135 fprintf(output, " default is the same as the first input file.\n");
136 fprintf(output, " an empty \"-T\" option will list the encapsulation types.\n");
137 fprintf(output, "\n");
138 fprintf(output, "Miscellaneous:\n");
139 fprintf(output, " -h display this help and exit.\n");
140 fprintf(output, " -v verbose output.\n");
144 const char *sstr; /* The short string */
145 const char *lstr; /* The long string */
149 string_compare(gconstpointer a, gconstpointer b)
151 return strcmp(((const struct string_elem *)a)->sstr,
152 ((const struct string_elem *)b)->sstr);
156 string_nat_compare(gconstpointer a, gconstpointer b)
158 return strnatcmp(((const struct string_elem *)a)->sstr,
159 ((const struct string_elem *)b)->sstr);
163 string_elem_print(gpointer data, gpointer not_used _U_)
165 fprintf(stderr, " %s - %s\n", ((struct string_elem *)data)->sstr,
166 ((struct string_elem *)data)->lstr);
170 list_capture_types(void) {
172 struct string_elem *captypes;
175 captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
177 fprintf(stderr, "mergecap: The available capture file types for the \"-F\" flag are:\n");
178 for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
179 if (wtap_dump_can_open(i)) {
180 captypes[i].sstr = wtap_file_type_subtype_short_string(i);
181 captypes[i].lstr = wtap_file_type_subtype_string(i);
182 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
185 g_slist_foreach(list, string_elem_print, NULL);
191 list_encap_types(void) {
193 struct string_elem *encaps;
196 encaps = g_new(struct string_elem,WTAP_NUM_ENCAP_TYPES);
197 fprintf(stderr, "mergecap: The available encapsulation types for the \"-T\" flag are:\n");
198 for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
199 encaps[i].sstr = wtap_encap_short_string(i);
200 if (encaps[i].sstr != NULL) {
201 encaps[i].lstr = wtap_encap_string(i);
202 list = g_slist_insert_sorted(list, &encaps[i], string_nat_compare);
205 g_slist_foreach(list, string_elem_print, NULL);
211 main(int argc, char *argv[])
214 gboolean do_append = FALSE;
215 gboolean verbose = FALSE;
216 int in_file_count = 0;
218 #ifdef PCAP_NG_DEFAULT
219 int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcap format */
221 int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcapng format */
225 merge_in_file_t *in_files = NULL, *in_file;
227 struct wtap_pkthdr *phdr, snap_phdr;
229 int open_err, read_err = 0, write_err, close_err;
232 char *out_filename = NULL;
233 gboolean got_read_error = FALSE, got_write_error = FALSE;
237 arg_list_utf_16to8(argc, argv);
238 create_app_running_mutex();
241 /* Process the options first */
242 while ((opt = getopt(argc, argv, "aF:hs:T:vw:")) != -1) {
246 do_append = !do_append;
250 file_type = wtap_short_string_to_file_type_subtype(optarg);
252 fprintf(stderr, "mergecap: \"%s\" isn't a valid capture file type\n",
254 list_capture_types();
265 snaplen = get_positive_int(optarg, "snapshot length");
269 frame_type = wtap_short_string_to_encap(optarg);
270 if (frame_type < 0) {
271 fprintf(stderr, "mergecap: \"%s\" isn't a valid encapsulation type\n",
283 out_filename = optarg;
286 case '?': /* Bad options if GNU getopt */
289 list_capture_types();
302 /* check for proper args; at a minimum, must have an output
303 * filename and one input file
305 in_file_count = argc - optind;
307 fprintf(stderr, "mergecap: an output filename must be set with -w\n");
308 fprintf(stderr, " run with -h for help\n");
311 if (in_file_count < 1) {
312 fprintf(stderr, "mergecap: No input files were specified\n");
316 /* open the input files */
317 if (!merge_open_in_files(in_file_count, &argv[optind], &in_files,
318 &open_err, &err_info, &err_fileno)) {
319 fprintf(stderr, "mergecap: Can't open %s: %s\n", argv[optind + err_fileno],
320 wtap_strerror(open_err));
323 case WTAP_ERR_UNSUPPORTED:
324 case WTAP_ERR_UNSUPPORTED_ENCAP:
325 case WTAP_ERR_BAD_FILE:
326 fprintf(stderr, "(%s)\n", err_info);
334 for (i = 0; i < in_file_count; i++)
335 fprintf(stderr, "mergecap: %s is type %s.\n", argv[optind + i],
336 wtap_file_type_subtype_string(wtap_file_type_subtype(in_files[i].wth)));
341 * Snapshot length not specified - default to the maximum of the
342 * snapshot lengths of the input files.
344 snaplen = merge_max_snapshot_length(in_file_count, in_files);
347 /* set the outfile frame type */
348 if (frame_type == -2) {
350 * Default to the appropriate frame type for the input files.
352 frame_type = merge_select_frame_type(in_file_count, in_files);
354 if (frame_type == WTAP_ENCAP_PER_PACKET) {
356 * Find out why we had to choose WTAP_ENCAP_PER_PACKET.
358 int first_frame_type, this_frame_type;
360 first_frame_type = wtap_file_encap(in_files[0].wth);
361 for (i = 1; i < in_file_count; i++) {
362 this_frame_type = wtap_file_encap(in_files[i].wth);
363 if (first_frame_type != this_frame_type) {
364 fprintf(stderr, "mergecap: multiple frame encapsulation types detected\n");
365 fprintf(stderr, " defaulting to WTAP_ENCAP_PER_PACKET\n");
366 fprintf(stderr, " %s had type %s (%s)\n",
367 in_files[0].filename,
368 wtap_encap_string(first_frame_type),
369 wtap_encap_short_string(first_frame_type));
370 fprintf(stderr, " %s had type %s (%s)\n",
371 in_files[i].filename,
372 wtap_encap_string(this_frame_type),
373 wtap_encap_short_string(this_frame_type));
378 fprintf(stderr, "mergecap: selected frame_type %s (%s)\n",
379 wtap_encap_string(frame_type),
380 wtap_encap_short_string(frame_type));
384 /* open the outfile */
385 if (strncmp(out_filename, "-", 2) == 0) {
386 /* use stdout as the outfile */
387 out_fd = 1 /*stdout*/;
389 /* open the outfile */
390 out_fd = ws_open(out_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
392 fprintf(stderr, "mergecap: Couldn't open output file %s: %s\n",
393 out_filename, g_strerror(errno));
398 /* prepare the outfile */
399 if(file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG ){
400 wtapng_section_t *shb_hdr;
401 GString *comment_gstr;
403 shb_hdr = g_new(wtapng_section_t,1);
404 comment_gstr = g_string_new("File created by merging: \n");
406 for (i = 0; i < in_file_count; i++) {
407 g_string_append_printf(comment_gstr, "File%d: %s \n",i+1,in_files[i].filename);
409 shb_hdr->section_length = -1;
411 shb_hdr->opt_comment = comment_gstr->str; /* NULL if not available */
412 shb_hdr->shb_hardware = NULL; /* NULL if not available, UTF-8 string containing the description of the hardware used to create this section. */
413 shb_hdr->shb_os = NULL; /* NULL if not available, UTF-8 string containing the name of the operating system used to create this section. */
414 shb_hdr->shb_user_appl = "mergecap"; /* NULL if not available, UTF-8 string containing the name of the application used to create this section. */
416 pdh = wtap_dump_fdopen_ng(out_fd, file_type, frame_type, snaplen,
417 FALSE /* compressed */, shb_hdr, NULL /* wtapng_iface_descriptions_t *idb_inf */, &open_err);
418 g_string_free(comment_gstr, TRUE);
420 pdh = wtap_dump_fdopen(out_fd, file_type, frame_type, snaplen, FALSE /* compressed */, &open_err);
423 merge_close_in_files(in_file_count, in_files);
425 fprintf(stderr, "mergecap: Can't open or create %s: %s\n", out_filename,
426 wtap_strerror(open_err));
430 /* do the merge (or append) */
434 in_file = merge_append_read_packet(in_file_count, in_files, &read_err,
437 in_file = merge_read_packet(in_file_count, in_files, &read_err,
439 if (in_file == NULL) {
445 /* I/O error reading from in_file */
446 got_read_error = TRUE;
451 fprintf(stderr, "Record: %u\n", count++);
453 /* We simply write it, perhaps after truncating it; we could do other
454 * things, like modify it. */
455 phdr = wtap_phdr(in_file->wth);
456 if (snaplen != 0 && phdr->caplen > snaplen) {
458 snap_phdr.caplen = snaplen;
462 if (!wtap_dump(pdh, phdr, wtap_buf_ptr(in_file->wth), &write_err)) {
463 got_write_error = TRUE;
468 merge_close_in_files(in_file_count, in_files);
469 if (!got_write_error) {
470 if (!wtap_dump_close(pdh, &write_err))
471 got_write_error = TRUE;
474 * We already got a write error; no need to report another
475 * write error on close.
477 * Don't overwrite the earlier write error.
479 (void)wtap_dump_close(pdh, &close_err);
482 if (got_read_error) {
484 * Find the file on which we got the error, and report the error.
486 for (i = 0; i < in_file_count; i++) {
487 if (in_files[i].state == GOT_ERROR) {
488 fprintf(stderr, "mergecap: Error reading %s: %s\n",
489 in_files[i].filename, wtap_strerror(read_err));
492 case WTAP_ERR_UNSUPPORTED:
493 case WTAP_ERR_UNSUPPORTED_ENCAP:
494 case WTAP_ERR_BAD_FILE:
495 fprintf(stderr, "(%s)\n", err_info);
503 if (got_write_error) {
506 case WTAP_ERR_UNSUPPORTED_ENCAP:
508 * This is a problem with the particular frame we're writing and
509 * the file type and subtype we're wwriting; note that, and
510 * report the frame number and file type/subtype.
512 fprintf(stderr, "mergecap: Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
513 in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
514 wtap_file_type_subtype_string(file_type));
517 case WTAP_ERR_PACKET_TOO_LARGE:
519 * This is a problem with the particular frame we're writing and
520 * the file type and subtype we're wwriting; note that, and
521 * report the frame number and file type/subtype.
523 fprintf(stderr, "mergecap: Frame %u of \"%s\" is too large for a \"%s\" file\n.",
524 in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
525 wtap_file_type_subtype_string(file_type));
529 fprintf(stderr, "mergecap: Error writing to outfile: %s\n",
530 wtap_strerror(write_err));
537 return (!got_read_error && !got_write_error) ? 0 : 2;
541 * Editor modelines - http://www.wireshark.org/tools/modelines.html
546 * indent-tabs-mode: nil
549 * vi: set shiftwidth=2 tabstop=8 expandtab:
550 * :indentSize=2:tabSize=8:noTabs=true: