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
41 #ifdef HAVE_SYS_TIME_H
46 #include <zlib.h> /* to get the libz version number */
52 #ifndef HAVE_GETOPT_LONG
53 #include <wsutil/wsgetopt.h>
56 #include <wsutil/clopts_common.h>
57 #include <wsutil/strnatcmp.h>
58 #include <wsutil/file_util.h>
59 #include <wsutil/cmdarg_err.h>
60 #include <wsutil/crash_info.h>
61 #include <wsutil/os_version_info.h>
62 #include <wsutil/ws_version_info.h>
64 #include <wiretap/merge.h>
66 #include "version_info.h"
73 #include <wsutil/unicode-utils.h>
80 print_usage(FILE *output)
82 fprintf(output, "\n");
83 fprintf(output, "Usage: mergecap [options] -w <outfile>|- <infile> [<infile> ...]\n");
84 fprintf(output, "\n");
85 fprintf(output, "Output:\n");
86 fprintf(output, " -a concatenate rather than merge files.\n");
87 fprintf(output, " default is to merge based on frame timestamps.\n");
88 fprintf(output, " -s <snaplen> truncate packets to <snaplen> bytes of data.\n");
89 fprintf(output, " -w <outfile>|- set the output filename to <outfile> or '-' for stdout.\n");
90 fprintf(output, " -F <capture type> set the output file type; default is pcapng.\n");
91 fprintf(output, " an empty \"-F\" option will list the file types.\n");
92 fprintf(output, " -T <encap type> set the output file encapsulation type;\n");
93 fprintf(output, " default is the same as the first input file.\n");
94 fprintf(output, " an empty \"-T\" option will list the encapsulation types.\n");
95 fprintf(output, "\n");
96 fprintf(output, "Miscellaneous:\n");
97 fprintf(output, " -h display this help and exit.\n");
98 fprintf(output, " -v verbose output.\n");
102 * Report an error in command-line arguments.
105 mergecap_cmdarg_err(const char *fmt, va_list ap)
107 fprintf(stderr, "mergecap: ");
108 vfprintf(stderr, fmt, ap);
109 fprintf(stderr, "\n");
113 * Report additional information for an error in command-line arguments.
116 mergecap_cmdarg_err_cont(const char *fmt, va_list ap)
118 vfprintf(stderr, fmt, ap);
119 fprintf(stderr, "\n");
123 const char *sstr; /* The short string */
124 const char *lstr; /* The long string */
128 string_compare(gconstpointer a, gconstpointer b)
130 return strcmp(((const struct string_elem *)a)->sstr,
131 ((const struct string_elem *)b)->sstr);
135 string_nat_compare(gconstpointer a, gconstpointer b)
137 return ws_ascii_strnatcmp(((const struct string_elem *)a)->sstr,
138 ((const struct string_elem *)b)->sstr);
142 string_elem_print(gpointer data, gpointer not_used _U_)
144 fprintf(stderr, " %s - %s\n", ((struct string_elem *)data)->sstr,
145 ((struct string_elem *)data)->lstr);
149 list_capture_types(void) {
151 struct string_elem *captypes;
154 captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
156 fprintf(stderr, "mergecap: The available capture file types for the \"-F\" flag are:\n");
157 for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
158 if (wtap_dump_can_open(i)) {
159 captypes[i].sstr = wtap_file_type_subtype_short_string(i);
160 captypes[i].lstr = wtap_file_type_subtype_string(i);
161 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
164 g_slist_foreach(list, string_elem_print, NULL);
170 list_encap_types(void) {
172 struct string_elem *encaps;
175 encaps = g_new(struct string_elem,WTAP_NUM_ENCAP_TYPES);
176 fprintf(stderr, "mergecap: The available encapsulation types for the \"-T\" flag are:\n");
177 for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
178 encaps[i].sstr = wtap_encap_short_string(i);
179 if (encaps[i].sstr != NULL) {
180 encaps[i].lstr = wtap_encap_string(i);
181 list = g_slist_insert_sorted(list, &encaps[i], string_nat_compare);
184 g_slist_foreach(list, string_elem_print, NULL);
190 get_mergecap_compiled_info(GString *str)
193 g_string_append(str, ", ");
195 g_string_append(str, "with libz ");
197 g_string_append(str, ZLIB_VERSION);
198 #else /* ZLIB_VERSION */
199 g_string_append(str, "(version unknown)");
200 #endif /* ZLIB_VERSION */
201 #else /* HAVE_LIBZ */
202 g_string_append(str, "without libz");
203 #endif /* HAVE_LIBZ */
207 get_mergecap_runtime_info(GString *str)
210 #if defined(HAVE_LIBZ) && !defined(_WIN32)
211 g_string_append_printf(str, ", with libz %s", zlibVersion());
216 main(int argc, char *argv[])
218 GString *comp_info_str;
219 GString *runtime_info_str;
221 static const struct option long_options[] = {
222 {(char *)"help", no_argument, NULL, 'h'},
223 {(char *)"version", no_argument, NULL, 'V'},
226 gboolean do_append = FALSE;
227 gboolean verbose = FALSE;
228 int in_file_count = 0;
230 #ifdef PCAP_NG_DEFAULT
231 int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcap format */
233 int file_type = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcapng format */
237 merge_in_file_t *in_files = NULL, *in_file;
239 struct wtap_pkthdr *phdr, snap_phdr;
241 int open_err, read_err = 0, write_err, close_err;
242 gchar *err_info, *write_err_info = NULL;
244 char *out_filename = NULL;
245 gboolean got_read_error = FALSE, got_write_error = FALSE;
248 cmdarg_err_init(mergecap_cmdarg_err, mergecap_cmdarg_err_cont);
251 arg_list_utf_16to8(argc, argv);
252 create_app_running_mutex();
255 /* Assemble the compile-time version information string */
256 comp_info_str = g_string_new("Compiled ");
257 get_compiled_version_info(comp_info_str, NULL, get_mergecap_compiled_info);
259 /* Assemble the run-time version information string */
260 runtime_info_str = g_string_new("Running ");
261 get_runtime_version_info(runtime_info_str, get_mergecap_runtime_info);
263 /* Add it to the information to be reported on a crash. */
264 ws_add_crash_info("Mergecap (Wireshark) %s\n"
269 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
271 /* Process the options first */
272 while ((opt = getopt_long(argc, argv, "aF:hs:T:vVw:", long_options, NULL)) != -1) {
276 do_append = !do_append;
280 file_type = wtap_short_string_to_file_type_subtype(optarg);
282 fprintf(stderr, "mergecap: \"%s\" isn't a valid capture file type\n",
284 list_capture_types();
290 printf("Mergecap (Wireshark) %s\n"
291 "Merge two or more capture files into one.\n"
292 "See http://www.wireshark.org for more information.\n",
293 get_ws_vcs_version_info());
299 snaplen = get_positive_int(optarg, "snapshot length");
303 frame_type = wtap_short_string_to_encap(optarg);
304 if (frame_type < 0) {
305 fprintf(stderr, "mergecap: \"%s\" isn't a valid encapsulation type\n",
317 show_version("Mergecap (Wireshark)", comp_info_str, runtime_info_str);
318 g_string_free(comp_info_str, TRUE);
319 g_string_free(runtime_info_str, TRUE);
324 out_filename = optarg;
327 case '?': /* Bad options if GNU getopt */
330 list_capture_types();
343 /* check for proper args; at a minimum, must have an output
344 * filename and one input file
346 in_file_count = argc - optind;
348 fprintf(stderr, "mergecap: an output filename must be set with -w\n");
349 fprintf(stderr, " run with -h for help\n");
352 if (in_file_count < 1) {
353 fprintf(stderr, "mergecap: No input files were specified\n");
357 /* open the input files */
358 if (!merge_open_in_files(in_file_count, &argv[optind], &in_files,
359 &open_err, &err_info, &err_fileno)) {
360 fprintf(stderr, "mergecap: Can't open %s: %s\n", argv[optind + err_fileno],
361 wtap_strerror(open_err));
362 if (err_info != NULL) {
363 fprintf(stderr, "(%s)\n", err_info);
370 for (i = 0; i < in_file_count; i++)
371 fprintf(stderr, "mergecap: %s is type %s.\n", argv[optind + i],
372 wtap_file_type_subtype_string(wtap_file_type_subtype(in_files[i].wth)));
377 * Snapshot length not specified - default to the maximum of the
378 * snapshot lengths of the input files.
380 snaplen = merge_max_snapshot_length(in_file_count, in_files);
383 /* set the outfile frame type */
384 if (frame_type == -2) {
386 * Default to the appropriate frame type for the input files.
388 frame_type = merge_select_frame_type(in_file_count, in_files);
390 if (frame_type == WTAP_ENCAP_PER_PACKET) {
392 * Find out why we had to choose WTAP_ENCAP_PER_PACKET.
394 int first_frame_type, this_frame_type;
396 first_frame_type = wtap_file_encap(in_files[0].wth);
397 for (i = 1; i < in_file_count; i++) {
398 this_frame_type = wtap_file_encap(in_files[i].wth);
399 if (first_frame_type != this_frame_type) {
400 fprintf(stderr, "mergecap: multiple frame encapsulation types detected\n");
401 fprintf(stderr, " defaulting to WTAP_ENCAP_PER_PACKET\n");
402 fprintf(stderr, " %s had type %s (%s)\n",
403 in_files[0].filename,
404 wtap_encap_string(first_frame_type),
405 wtap_encap_short_string(first_frame_type));
406 fprintf(stderr, " %s had type %s (%s)\n",
407 in_files[i].filename,
408 wtap_encap_string(this_frame_type),
409 wtap_encap_short_string(this_frame_type));
414 fprintf(stderr, "mergecap: selected frame_type %s (%s)\n",
415 wtap_encap_string(frame_type),
416 wtap_encap_short_string(frame_type));
420 /* open the outfile */
421 if (strncmp(out_filename, "-", 2) == 0) {
422 /* use stdout as the outfile */
423 out_fd = 1 /*stdout*/;
425 /* open the outfile */
426 out_fd = ws_open(out_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
428 fprintf(stderr, "mergecap: Couldn't open output file %s: %s\n",
429 out_filename, g_strerror(errno));
434 /* prepare the outfile */
435 if(file_type == WTAP_FILE_TYPE_SUBTYPE_PCAPNG ){
436 wtapng_section_t *shb_hdr;
437 GString *comment_gstr;
439 shb_hdr = g_new(wtapng_section_t,1);
440 comment_gstr = g_string_new("File created by merging: \n");
442 for (i = 0; i < in_file_count; i++) {
443 g_string_append_printf(comment_gstr, "File%d: %s \n",i+1,in_files[i].filename);
445 shb_hdr->section_length = -1;
447 shb_hdr->opt_comment = comment_gstr->str; /* NULL if not available */
448 shb_hdr->shb_hardware = NULL; /* NULL if not available, UTF-8 string containing the description of the hardware used to create this section. */
449 shb_hdr->shb_os = NULL; /* NULL if not available, UTF-8 string containing the name of the operating system used to create this section. */
450 shb_hdr->shb_user_appl = g_strdup("mergecap"); /* NULL if not available, UTF-8 string containing the name of the application used to create this section. */
452 pdh = wtap_dump_fdopen_ng(out_fd, file_type, frame_type, snaplen,
453 FALSE /* compressed */, shb_hdr, NULL /* wtapng_iface_descriptions_t *idb_inf */, &open_err);
454 g_string_free(comment_gstr, TRUE);
456 pdh = wtap_dump_fdopen(out_fd, file_type, frame_type, snaplen, FALSE /* compressed */, &open_err);
459 merge_close_in_files(in_file_count, in_files);
461 fprintf(stderr, "mergecap: Can't open or create %s: %s\n", out_filename,
462 wtap_strerror(open_err));
466 /* do the merge (or append) */
470 in_file = merge_append_read_packet(in_file_count, in_files, &read_err,
473 in_file = merge_read_packet(in_file_count, in_files, &read_err,
475 if (in_file == NULL) {
481 /* I/O error reading from in_file */
482 got_read_error = TRUE;
487 fprintf(stderr, "Record: %u\n", count++);
489 /* We simply write it, perhaps after truncating it; we could do other
490 * things, like modify it. */
491 phdr = wtap_phdr(in_file->wth);
492 if (snaplen != 0 && phdr->caplen > snaplen) {
494 snap_phdr.caplen = snaplen;
498 if (!wtap_dump(pdh, phdr, wtap_buf_ptr(in_file->wth), &write_err, &write_err_info)) {
499 got_write_error = TRUE;
504 merge_close_in_files(in_file_count, in_files);
505 if (!got_write_error) {
506 if (!wtap_dump_close(pdh, &write_err))
507 got_write_error = TRUE;
510 * We already got a write error; no need to report another
511 * write error on close.
513 * Don't overwrite the earlier write error.
515 (void)wtap_dump_close(pdh, &close_err);
518 if (got_read_error) {
520 * Find the file on which we got the error, and report the error.
522 for (i = 0; i < in_file_count; i++) {
523 if (in_files[i].state == GOT_ERROR) {
524 fprintf(stderr, "mergecap: Error reading %s: %s\n",
525 in_files[i].filename, wtap_strerror(read_err));
526 if (err_info != NULL) {
527 fprintf(stderr, "(%s)\n", err_info);
534 if (got_write_error) {
537 case WTAP_ERR_UNWRITABLE_ENCAP:
539 * This is a problem with the particular frame we're writing and
540 * the file type and subtype we're wwriting; note that, and
541 * report the frame number and file type/subtype.
543 fprintf(stderr, "mergecap: Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
544 in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
545 wtap_file_type_subtype_string(file_type));
548 case WTAP_ERR_PACKET_TOO_LARGE:
550 * This is a problem with the particular frame we're writing and
551 * the file type and subtype we're wwriting; note that, and
552 * report the frame number and file type/subtype.
554 fprintf(stderr, "mergecap: Frame %u of \"%s\" is too large for a \"%s\" file.\n",
555 in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
556 wtap_file_type_subtype_string(file_type));
559 case WTAP_ERR_UNWRITABLE_REC_TYPE:
561 * This is a problem with the particular record we're writing and
562 * the file type and subtype we're wwriting; note that, and
563 * report the record number and file type/subtype.
565 fprintf(stderr, "mergecap: Record %u of \"%s\" has a record type that can't be saved in a \"%s\" file.\n",
566 in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
567 wtap_file_type_subtype_string(file_type));
570 case WTAP_ERR_UNWRITABLE_REC_DATA:
572 * This is a problem with the particular record we're writing and
573 * the file type and subtype we're wwriting; note that, and
574 * report the record number and file type/subtype.
576 fprintf(stderr, "mergecap: Record %u of \"%s\" has data that can't be saved in a \"%s\" file.\n(%s)\n",
577 in_file ? in_file->packet_num : 0, in_file ? in_file->filename : "UNKNOWN",
578 wtap_file_type_subtype_string(file_type),
579 write_err_info != NULL ? write_err_info : "no information supplied");
580 g_free(write_err_info);
584 fprintf(stderr, "mergecap: Error writing to outfile: %s\n",
585 wtap_strerror(write_err));
592 return (!got_read_error && !got_write_error) ? 0 : 2;
596 * Editor modelines - http://www.wireshark.org/tools/modelines.html
601 * indent-tabs-mode: nil
604 * vi: set shiftwidth=2 tabstop=8 expandtab:
605 * :indentSize=2:tabSize=8:noTabs=true: