1 /* Edit capture files. We can delete packets, adjust timestamps, or
2 * simply convert from one format to another format.
4 * Originally written by Richard Sharpe.
5 * Improved by Guy Harris.
6 * Further improved by Richard Sharpe.
8 * Copyright 2013, Richard Sharpe <realrichardsharpe[AT]gmail.com>
10 * Wireshark - Network traffic analyzer
11 * By Gerald Combs <gerald@wireshark.org>
12 * Copyright 1998 Gerald Combs
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
37 * Just make sure we include the prototype for strptime as well
38 * (needed for glibc 2.2) but make sure we do this only if not
57 #ifdef HAVE_SYS_TIME_H
62 #include <zlib.h> /* to get the libz version number */
68 #include "wsutil/wsgetopt.h"
72 #include <wsutil/file_util.h>
73 #include <wsutil/unicode-utils.h>
74 #include <process.h> /* getpid */
75 #ifdef HAVE_WINSOCK2_H
81 # include "wsutil/strptime.h"
84 #include <wsutil/privileges.h>
85 #include <wsutil/filesystem.h>
86 #include <wsutil/report_err.h>
87 #include <wsutil/strnatcmp.h>
88 #include <wsutil/md5.h>
89 #include <wsutil/plugins.h>
90 #include <wsutil/crash_info.h>
91 #include <wsutil/copyright_info.h>
92 #include <wsutil/os_version_info.h>
93 #include <wsutil/ws_version_info.h>
95 #include "version_info.h"
97 #include "ringbuffer.h" /* For RINGBUFFER_MAX_NUM_FILES */
100 * Some globals so we can pass things to various routines
109 * Duplicate frame detection
111 typedef struct _fd_hash_t {
112 md5_byte_t digest[16];
117 #define DEFAULT_DUP_DEPTH 5 /* Used with -d */
118 #define MAX_DUP_DEPTH 1000000 /* the maximum window (and actual size of fd_hash[]) for de-duplication */
120 static fd_hash_t fd_hash[MAX_DUP_DEPTH];
121 static int dup_window = DEFAULT_DUP_DEPTH;
122 static int cur_dup_entry = 0;
124 static int ignored_bytes = 0; /* Used with -I */
126 #define ONE_BILLION 1000000000
128 /* Weights of different errors we can introduce */
129 /* We should probably make these command-line arguments */
130 /* XXX - Should we add a bit-level error? */
131 #define ERR_WT_BIT 5 /* Flip a random bit */
132 #define ERR_WT_BYTE 5 /* Substitute a random byte */
133 #define ERR_WT_ALNUM 5 /* Substitute a random character in [A-Za-z0-9] */
134 #define ERR_WT_FMT 2 /* Substitute "%s" */
135 #define ERR_WT_AA 1 /* Fill the remainder of the buffer with 0xAA */
136 #define ERR_WT_TOTAL (ERR_WT_BIT + ERR_WT_BYTE + ERR_WT_ALNUM + ERR_WT_FMT + ERR_WT_AA)
138 #define ALNUM_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
139 #define ALNUM_LEN (sizeof(ALNUM_CHARS) - 1)
141 struct time_adjustment {
146 typedef struct _chop_t {
155 #define MAX_SELECTIONS 512
156 static struct select_item selectfrm[MAX_SELECTIONS];
157 static int max_selected = -1;
158 static int keep_em = 0;
159 #ifdef PCAP_NG_DEFAULT
160 static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcapng */
162 static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcap */
164 static int out_frame_type = -2; /* Leave frame type alone */
165 static int verbose = 0; /* Not so verbose */
166 static struct time_adjustment time_adj = {{0, 0}, 0}; /* no adjustment */
167 static nstime_t relative_time_window = {0, 0}; /* de-dup time window */
168 static double err_prob = 0.0;
169 static time_t starttime = 0;
170 static time_t stoptime = 0;
171 static gboolean check_startstop = FALSE;
172 static gboolean dup_detect = FALSE;
173 static gboolean dup_detect_by_time = FALSE;
175 static int do_strict_time_adjustment = FALSE;
176 static struct time_adjustment strict_time_adj = {{0, 0}, 0}; /* strict time adjustment */
177 static nstime_t previous_time = {0, 0}; /* previous time */
179 static int find_dct2000_real_data(guint8 *buf);
180 static void handle_chopping(chop_t chop, struct wtap_pkthdr *out_phdr,
181 const struct wtap_pkthdr *in_phdr, guint8 **buf,
185 abs_time_to_str_with_sec_resolution(const nstime_t *abs_time)
188 gchar *buf = (gchar *)g_malloc(16);
190 tmp = localtime(&abs_time->secs);
193 g_snprintf(buf, 16, "%d%02d%02d%02d%02d%02d",
208 fileset_get_filename_by_pattern(guint idx, const struct wtap_pkthdr *phdr,
209 gchar *fprefix, gchar *fsuffix)
215 g_snprintf(filenum, sizeof(filenum), "%05u", idx % RINGBUFFER_MAX_NUM_FILES);
216 if (phdr->presence_flags & WTAP_HAS_TS) {
217 timestr = abs_time_to_str_with_sec_resolution(&phdr->ts);
218 abs_str = g_strconcat(fprefix, "_", filenum, "_", timestr, fsuffix, NULL);
221 abs_str = g_strconcat(fprefix, "_", filenum, fsuffix, NULL);
227 fileset_extract_prefix_suffix(const char *fname, gchar **fprefix, gchar **fsuffix)
229 char *pfx, *last_pathsep;
232 save_file = g_strdup(fname);
233 if (save_file == NULL) {
234 fprintf(stderr, "editcap: Out of memory\n");
238 last_pathsep = strrchr(save_file, G_DIR_SEPARATOR);
239 pfx = strrchr(save_file,'.');
240 if (pfx != NULL && (last_pathsep == NULL || pfx > last_pathsep)) {
241 /* The pathname has a "." in it, and it's in the last component
242 * of the pathname (because there is either only one component,
243 * i.e. last_pathsep is null as there are no path separators,
244 * or the "." is after the path separator before the last
247 * Treat it as a separator between the rest of the file name and
248 * the file name suffix, and arrange that the names given to the
249 * ring buffer files have the specified suffix, i.e. put the
250 * changing part of the name *before* the suffix. */
252 *fprefix = g_strdup(save_file);
253 pfx[0] = '.'; /* restore capfile_name */
254 *fsuffix = g_strdup(pfx);
256 /* Either there's no "." in the pathname, or it's in a directory
257 * component, so the last component has no suffix. */
258 *fprefix = g_strdup(save_file);
265 /* Add a selection item, a simple parser for now */
267 add_selection(char *sel)
272 if (++max_selected >= MAX_SELECTIONS) {
273 /* Let the user know we stopped selecting */
274 fprintf(stderr, "Out of room for packet selections!\n");
279 fprintf(stderr, "Add_Selected: %s\n", sel);
281 if ((locn = strchr(sel, '-')) == NULL) { /* No dash, so a single number? */
283 fprintf(stderr, "Not inclusive ...");
285 selectfrm[max_selected].inclusive = 0;
286 selectfrm[max_selected].first = atoi(sel);
289 fprintf(stderr, " %i\n", selectfrm[max_selected].first);
292 fprintf(stderr, "Inclusive ...");
295 selectfrm[max_selected].inclusive = 1;
296 selectfrm[max_selected].first = atoi(sel);
297 selectfrm[max_selected].second = atoi(next);
300 fprintf(stderr, " %i, %i\n", selectfrm[max_selected].first,
301 selectfrm[max_selected].second);
307 /* Was the packet selected? */
314 for (i = 0; i <= max_selected; i++) {
315 if (selectfrm[i].inclusive) {
316 if (selectfrm[i].first <= recno && selectfrm[i].second >= recno)
319 if (recno == selectfrm[i].first)
328 set_time_adjustment(char *optarg_str_p)
337 /* skip leading whitespace */
338 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
341 /* check for a negative adjustment */
342 if (*optarg_str_p == '-') {
343 time_adj.is_negative = 1;
347 /* collect whole number of seconds, if any */
348 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
352 val = strtol(optarg_str_p, &frac, 10);
353 if (frac == NULL || frac == optarg_str_p
354 || val == LONG_MIN || val == LONG_MAX) {
355 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
359 if (val < 0) { /* implies '--' since we caught '-' above */
360 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
365 time_adj.tv.secs = val;
367 /* now collect the partial seconds, if any */
368 if (*frac != '\0') { /* chars left, so get fractional part */
369 val = strtol(&(frac[1]), &end, 10);
370 /* if more than 9 fractional digits truncate to 9 */
371 if ((end - &(frac[1])) > 9) {
372 frac[10] = 't'; /* 't' for truncate */
373 val = strtol(&(frac[1]), &end, 10);
375 if (*frac != '.' || end == NULL || end == frac || val < 0
376 || val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
377 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
382 return; /* no fractional digits */
385 /* adjust fractional portion from fractional to numerator
386 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
387 if (frac && end) { /* both are valid */
388 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
389 while(frac_digits < 9) { /* this is frac of 10^9 */
394 time_adj.tv.nsecs = (int)val;
398 set_strict_time_adj(char *optarg_str_p)
407 /* skip leading whitespace */
408 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
412 * check for a negative adjustment
413 * A negative strict adjustment value is a flag
414 * to adjust all frames by the specifed delta time.
416 if (*optarg_str_p == '-') {
417 strict_time_adj.is_negative = 1;
421 /* collect whole number of seconds, if any */
422 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
426 val = strtol(optarg_str_p, &frac, 10);
427 if (frac == NULL || frac == optarg_str_p
428 || val == LONG_MIN || val == LONG_MAX) {
429 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
433 if (val < 0) { /* implies '--' since we caught '-' above */
434 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
439 strict_time_adj.tv.secs = val;
441 /* now collect the partial seconds, if any */
442 if (*frac != '\0') { /* chars left, so get fractional part */
443 val = strtol(&(frac[1]), &end, 10);
444 /* if more than 9 fractional digits truncate to 9 */
445 if ((end - &(frac[1])) > 9) {
446 frac[10] = 't'; /* 't' for truncate */
447 val = strtol(&(frac[1]), &end, 10);
449 if (*frac != '.' || end == NULL || end == frac || val < 0
450 || val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
451 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
456 return; /* no fractional digits */
459 /* adjust fractional portion from fractional to numerator
460 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
461 if (frac && end) { /* both are valid */
462 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
463 while(frac_digits < 9) { /* this is frac of 10^9 */
468 strict_time_adj.tv.nsecs = (int)val;
472 set_rel_time(char *optarg_str_p)
481 /* skip leading whitespace */
482 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
485 /* ignore negative adjustment */
486 if (*optarg_str_p == '-')
489 /* collect whole number of seconds, if any */
490 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
494 val = strtol(optarg_str_p, &frac, 10);
495 if (frac == NULL || frac == optarg_str_p
496 || val == LONG_MIN || val == LONG_MAX) {
497 fprintf(stderr, "1: editcap: \"%s\" isn't a valid rel time value\n",
501 if (val < 0) { /* implies '--' since we caught '-' above */
502 fprintf(stderr, "2: editcap: \"%s\" isn't a valid rel time value\n",
507 relative_time_window.secs = val;
509 /* now collect the partial seconds, if any */
510 if (*frac != '\0') { /* chars left, so get fractional part */
511 val = strtol(&(frac[1]), &end, 10);
512 /* if more than 9 fractional digits truncate to 9 */
513 if ((end - &(frac[1])) > 9) {
514 frac[10] = 't'; /* 't' for truncate */
515 val = strtol(&(frac[1]), &end, 10);
517 if (*frac != '.' || end == NULL || end == frac || val < 0
518 || val > ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
519 fprintf(stderr, "3: editcap: \"%s\" isn't a valid rel time value\n",
524 return; /* no fractional digits */
527 /* adjust fractional portion from fractional to numerator
528 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
529 if (frac && end) { /* both are valid */
530 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
531 while(frac_digits < 9) { /* this is frac of 10^9 */
536 relative_time_window.nsecs = (int)val;
540 is_duplicate(guint8* fd, guint32 len) {
544 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
548 new_fd = &fd[ignored_bytes];
549 new_len = len - (ignored_bytes);
552 if (cur_dup_entry >= dup_window)
555 /* Calculate our digest */
557 md5_append(&ms, new_fd, new_len);
558 md5_finish(&ms, fd_hash[cur_dup_entry].digest);
560 fd_hash[cur_dup_entry].len = len;
562 /* Look for duplicates */
563 for (i = 0; i < dup_window; i++) {
564 if (i == cur_dup_entry)
567 if (fd_hash[i].len == fd_hash[cur_dup_entry].len
568 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
577 is_duplicate_rel_time(guint8* fd, guint32 len, const nstime_t *current) {
581 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
585 new_fd = &fd[ignored_bytes];
586 new_len = len - (ignored_bytes);
589 if (cur_dup_entry >= dup_window)
592 /* Calculate our digest */
594 md5_append(&ms, new_fd, new_len);
595 md5_finish(&ms, fd_hash[cur_dup_entry].digest);
597 fd_hash[cur_dup_entry].len = len;
598 fd_hash[cur_dup_entry].time.secs = current->secs;
599 fd_hash[cur_dup_entry].time.nsecs = current->nsecs;
602 * Look for relative time related duplicates.
603 * This is hopefully a reasonably efficient mechanism for
604 * finding duplicates by rel time in the fd_hash[] cache.
605 * We check starting from the most recently added hash
606 * entries and work backwards towards older packets.
607 * This approach allows the dup test to be terminated
608 * when the relative time of a cached entry is found to
609 * be beyond the dup time window.
611 * Of course this assumes that the input trace file is
612 * "well-formed" in the sense that the packet timestamps are
613 * in strict chronologically increasing order (which is NOT
614 * always the case!!).
616 * The fd_hash[] table was deliberately created large (1,000,000).
617 * Looking for time related duplicates in large trace files with
618 * non-fractional dup time window values can potentially take
619 * a long time to complete.
622 for (i = cur_dup_entry - 1;; i--) {
629 if (i == cur_dup_entry) {
631 * We've decremented back to where we started.
637 if (nstime_is_unset(&(fd_hash[i].time))) {
639 * We've decremented to an unused fd_hash[] entry.
645 nstime_delta(&delta, current, &fd_hash[i].time);
647 if (delta.secs < 0 || delta.nsecs < 0) {
649 * A negative delta implies that the current packet
650 * has an absolute timestamp less than the cached packet
651 * that it is being compared to. This is NOT a normal
652 * situation since trace files usually have packets in
653 * chronological order (oldest to newest).
655 * There are several possible ways to deal with this:
656 * 1. 'continue' dup checking with the next cached frame.
657 * 2. 'break' from looking for a duplicate of the current frame.
658 * 3. Take the absolute value of the delta and see if that
659 * falls within the specifed dup time window.
661 * Currently this code does option 1. But it would pretty
662 * easy to add yet-another-editcap-option to select one of
663 * the other behaviors for dealing with out-of-sequence
669 cmp = nstime_cmp(&delta, &relative_time_window);
673 * The delta time indicates that we are now looking at
674 * cached packets beyond the specified dup time window.
678 } else if (fd_hash[i].len == fd_hash[cur_dup_entry].len
679 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
688 show_version(GString *comp_info_str, GString *runtime_info_str)
690 printf("Editcap (Wireshark) %s\n"
697 get_ws_vcs_version_info(), get_copyright_info(),
698 comp_info_str->str, runtime_info_str->str);
702 print_usage(FILE *output)
704 fprintf(output, "\n");
705 fprintf(output, "Usage: editcap [options] ... <infile> <outfile> [ <packet#>[-<packet#>] ... ]\n");
706 fprintf(output, "\n");
707 fprintf(output, "<infile> and <outfile> must both be present.\n");
708 fprintf(output, "A single packet or a range of packets can be selected.\n");
709 fprintf(output, "\n");
710 fprintf(output, "Packet selection:\n");
711 fprintf(output, " -r keep the selected packets; default is to delete them.\n");
712 fprintf(output, " -A <start time> only output packets whose timestamp is after (or equal\n");
713 fprintf(output, " to) the given time (format as YYYY-MM-DD hh:mm:ss).\n");
714 fprintf(output, " -B <stop time> only output packets whose timestamp is before the\n");
715 fprintf(output, " given time (format as YYYY-MM-DD hh:mm:ss).\n");
716 fprintf(output, "\n");
717 fprintf(output, "Duplicate packet removal:\n");
718 fprintf(output, " -d remove packet if duplicate (window == %d).\n", DEFAULT_DUP_DEPTH);
719 fprintf(output, " -D <dup window> remove packet if duplicate; configurable <dup window>\n");
720 fprintf(output, " Valid <dup window> values are 0 to %d.\n", MAX_DUP_DEPTH);
721 fprintf(output, " NOTE: A <dup window> of 0 with -v (verbose option) is\n");
722 fprintf(output, " useful to print MD5 hashes.\n");
723 fprintf(output, " -w <dup time window> remove packet if duplicate packet is found EQUAL TO OR\n");
724 fprintf(output, " LESS THAN <dup time window> prior to current packet.\n");
725 fprintf(output, " A <dup time window> is specified in relative seconds\n");
726 fprintf(output, " (e.g. 0.000001).\n");
727 fprintf(output, "\n");
728 fprintf(output, " -I <bytes to ignore> ignore the specified bytes at the beginning of\n");
729 fprintf(output, " the frame during MD5 hash calculation\n");
730 fprintf(output, " Useful to remove duplicated packets taken on\n");
731 fprintf(output, " several routers(differents mac addresses for \n");
732 fprintf(output, " example)\n");
733 fprintf(output, " e.g. -I 26 in case of Ether/IP/ will ignore \n");
734 fprintf(output, " ether(14) and IP header(20 - 4(src ip) - 4(dst ip)).\n");
735 fprintf(output, "\n");
736 fprintf(output, " NOTE: The use of the 'Duplicate packet removal' options with\n");
737 fprintf(output, " other editcap options except -v may not always work as expected.\n");
738 fprintf(output, " Specifically the -r, -t or -S options will very likely NOT have the\n");
739 fprintf(output, " desired effect if combined with the -d, -D or -w.\n");
740 fprintf(output, "\n");
741 fprintf(output, "Packet manipulation:\n");
742 fprintf(output, " -s <snaplen> truncate each packet to max. <snaplen> bytes of data.\n");
743 fprintf(output, " -C [offset:]<choplen> chop each packet by <choplen> bytes. Positive values\n");
744 fprintf(output, " chop at the packet beginning, negative values at the\n");
745 fprintf(output, " packet end. If an optional offset precedes the length,\n");
746 fprintf(output, " then the bytes chopped will be offset from that value.\n");
747 fprintf(output, " Positive offsets are from the packet beginning,\n");
748 fprintf(output, " negative offsets are from the packet end. You can use\n");
749 fprintf(output, " this option more than once, allowing up to 2 chopping\n");
750 fprintf(output, " regions within a packet provided that at least 1\n");
751 fprintf(output, " choplen is positive and at least 1 is negative.\n");
752 fprintf(output, " -L adjust the frame length when chopping and/or snapping\n");
753 fprintf(output, " -t <time adjustment> adjust the timestamp of each packet;\n");
754 fprintf(output, " <time adjustment> is in relative seconds (e.g. -0.5).\n");
755 fprintf(output, " -S <strict adjustment> adjust timestamp of packets if necessary to insure\n");
756 fprintf(output, " strict chronological increasing order. The <strict\n");
757 fprintf(output, " adjustment> is specified in relative seconds with\n");
758 fprintf(output, " values of 0 or 0.000001 being the most reasonable.\n");
759 fprintf(output, " A negative adjustment value will modify timestamps so\n");
760 fprintf(output, " that each packet's delta time is the absolute value\n");
761 fprintf(output, " of the adjustment specified. A value of -0 will set\n");
762 fprintf(output, " all packets to the timestamp of the first packet.\n");
763 fprintf(output, " -E <error probability> set the probability (between 0.0 and 1.0 incl.) that\n");
764 fprintf(output, " a particular packet byte will be randomly changed.\n");
765 fprintf(output, "\n");
766 fprintf(output, "Output File(s):\n");
767 fprintf(output, " -c <packets per file> split the packet output to different files based on\n");
768 fprintf(output, " uniform packet counts with a maximum of\n");
769 fprintf(output, " <packets per file> each.\n");
770 fprintf(output, " -i <seconds per file> split the packet output to different files based on\n");
771 fprintf(output, " uniform time intervals with a maximum of\n");
772 fprintf(output, " <seconds per file> each.\n");
773 fprintf(output, " -F <capture type> set the output file type; default is pcapng. An empty\n");
774 fprintf(output, " \"-F\" option will list the file types.\n");
775 fprintf(output, " -T <encap type> set the output file encapsulation type; default is the\n");
776 fprintf(output, " same as the input file. An empty \"-T\" option will\n");
777 fprintf(output, " list the encapsulation types.\n");
778 fprintf(output, "\n");
779 fprintf(output, "Miscellaneous:\n");
780 fprintf(output, " -h display this help and exit.\n");
781 fprintf(output, " -v verbose output.\n");
782 fprintf(output, " If -v is used with any of the 'Duplicate Packet\n");
783 fprintf(output, " Removal' options (-d, -D or -w) then Packet lengths\n");
784 fprintf(output, " and MD5 hashes are printed to standard-error.\n");
785 fprintf(output, "\n");
789 const char *sstr; /* The short string */
790 const char *lstr; /* The long string */
794 string_compare(gconstpointer a, gconstpointer b)
796 return strcmp(((const struct string_elem *)a)->sstr,
797 ((const struct string_elem *)b)->sstr);
801 string_nat_compare(gconstpointer a, gconstpointer b)
803 return ws_ascii_strnatcmp(((const struct string_elem *)a)->sstr,
804 ((const struct string_elem *)b)->sstr);
808 string_elem_print(gpointer data, gpointer not_used _U_)
810 fprintf(stderr, " %s - %s\n",
811 ((struct string_elem *)data)->sstr,
812 ((struct string_elem *)data)->lstr);
816 list_capture_types(void) {
818 struct string_elem *captypes;
821 captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
822 fprintf(stderr, "editcap: The available capture file types for the \"-F\" flag are:\n");
823 for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
824 if (wtap_dump_can_open(i)) {
825 captypes[i].sstr = wtap_file_type_subtype_short_string(i);
826 captypes[i].lstr = wtap_file_type_subtype_string(i);
827 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
830 g_slist_foreach(list, string_elem_print, NULL);
836 list_encap_types(void) {
838 struct string_elem *encaps;
841 encaps = (struct string_elem *)g_malloc(sizeof(struct string_elem) * WTAP_NUM_ENCAP_TYPES);
842 fprintf(stderr, "editcap: The available encapsulation types for the \"-T\" flag are:\n");
843 for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
844 encaps[i].sstr = wtap_encap_short_string(i);
845 if (encaps[i].sstr != NULL) {
846 encaps[i].lstr = wtap_encap_string(i);
847 list = g_slist_insert_sorted(list, &encaps[i], string_nat_compare);
850 g_slist_foreach(list, string_elem_print, NULL);
857 * Don't report failures to load plugins because most (non-wiretap) plugins
858 * *should* fail to load (because we're not linked against libwireshark and
859 * dissector plugins need libwireshark).
862 failure_message(const char *msg_format _U_, va_list ap _U_)
868 get_editcap_compiled_info(GString *str)
871 g_string_append(str, ", ");
873 g_string_append(str, "with libz ");
875 g_string_append(str, ZLIB_VERSION);
876 #else /* ZLIB_VERSION */
877 g_string_append(str, "(version unknown)");
878 #endif /* ZLIB_VERSION */
879 #else /* HAVE_LIBZ */
880 g_string_append(str, "without libz");
881 #endif /* HAVE_LIBZ */
885 get_editcap_runtime_info(GString *str)
888 #if defined(HAVE_LIBZ) && !defined(_WIN32)
889 g_string_append_printf(str, ", with libz %s", zlibVersion());
894 main(int argc, char *argv[])
896 GString *comp_info_str;
897 GString *runtime_info_str;
902 static const struct option long_options[] = {
903 {(char *)"help", no_argument, NULL, 'h'},
904 {(char *)"version", no_argument, NULL, 'V'},
909 guint32 snaplen = 0; /* No limit */
910 chop_t chop = {0, 0, 0, 0, 0, 0}; /* No chop */
911 gboolean adjlen = FALSE;
912 wtap_dumper *pdh = NULL;
913 unsigned int count = 1;
914 unsigned int duplicate_count = 0;
918 guint32 read_count = 0;
919 int split_packet_count = 0;
920 int written_count = 0;
921 char *filename = NULL;
923 int secs_per_block = 0;
925 nstime_t block_start;
926 gchar *fprefix = NULL;
927 gchar *fsuffix = NULL;
929 const struct wtap_pkthdr *phdr;
930 struct wtap_pkthdr snap_phdr;
931 wtapng_iface_descriptions_t *idb_inf;
932 wtapng_section_t *shb_hdr;
935 char* init_progfile_dir_error;
939 arg_list_utf_16to8(argc, argv);
940 create_app_running_mutex();
943 /* Assemble the compile-time version information string */
944 comp_info_str = g_string_new("Compiled ");
945 get_compiled_version_info(comp_info_str, NULL, get_editcap_compiled_info);
947 /* Assemble the run-time version information string */
948 runtime_info_str = g_string_new("Running ");
949 get_runtime_version_info(runtime_info_str, get_editcap_runtime_info);
951 /* Add it to the information to be reported on a crash. */
952 ws_add_crash_info("Editcap (Wireshark) %s\n"
957 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
960 * Get credential information for later use.
962 init_process_policies();
963 init_open_routines();
966 /* Register wiretap plugins */
967 if ((init_progfile_dir_error = init_progfile_dir(argv[0], main))) {
968 g_warning("editcap: init_progfile_dir(): %s", init_progfile_dir_error);
969 g_free(init_progfile_dir_error);
971 /* Register all the plugin types we have. */
972 wtap_register_plugin_types(); /* Types known to libwiretap */
974 init_report_err(failure_message,NULL,NULL,NULL);
976 /* Scan for plugins. This does *not* call their registration routines;
977 that's done later. */
980 /* Register all libwiretap plugin modules. */
981 register_all_wiretap_modules();
985 /* Process the options */
986 while ((opt = getopt_long(argc, argv, "A:B:c:C:dD:E:F:hi:I:Lrs:S:t:T:vVw:", long_options, NULL)) != -1) {
992 memset(&starttm,0,sizeof(struct tm));
994 if (!strptime(optarg,"%Y-%m-%d %T", &starttm)) {
995 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1000 check_startstop = TRUE;
1001 starttm.tm_isdst = -1;
1003 starttime = mktime(&starttm);
1011 memset(&stoptm,0,sizeof(struct tm));
1013 if (!strptime(optarg,"%Y-%m-%d %T", &stoptm)) {
1014 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1018 check_startstop = TRUE;
1019 stoptm.tm_isdst = -1;
1020 stoptime = mktime(&stoptm);
1025 split_packet_count = (int)strtol(optarg, &p, 10);
1026 if (p == optarg || *p != '\0') {
1027 fprintf(stderr, "editcap: \"%s\" isn't a valid packet count\n",
1031 if (split_packet_count <= 0) {
1032 fprintf(stderr, "editcap: \"%d\" packet count must be larger than zero\n",
1033 split_packet_count);
1040 int choplen = 0, chopoff = 0;
1042 switch (sscanf(optarg, "%d:%d", &chopoff, &choplen)) {
1043 case 1: /* only the chop length was specififed */
1048 case 2: /* both an offset and chop length was specified */
1052 fprintf(stderr, "editcap: \"%s\" isn't a valid chop length or offset:length\n",
1059 chop.len_begin += choplen;
1061 chop.off_begin_pos += chopoff;
1063 chop.off_begin_neg += chopoff;
1064 } else if (choplen < 0) {
1065 chop.len_end += choplen;
1067 chop.off_end_pos += chopoff;
1069 chop.off_end_neg += chopoff;
1076 dup_detect_by_time = FALSE;
1077 dup_window = DEFAULT_DUP_DEPTH;
1082 dup_detect_by_time = FALSE;
1083 dup_window = (int)strtol(optarg, &p, 10);
1084 if (p == optarg || *p != '\0') {
1085 fprintf(stderr, "editcap: \"%s\" isn't a valid duplicate window value\n",
1089 if (dup_window < 0 || dup_window > MAX_DUP_DEPTH) {
1090 fprintf(stderr, "editcap: \"%d\" duplicate window value must be between 0 and %d inclusive.\n",
1091 dup_window, MAX_DUP_DEPTH);
1097 err_prob = strtod(optarg, &p);
1098 if (p == optarg || err_prob < 0.0 || err_prob > 1.0) {
1099 fprintf(stderr, "editcap: probability \"%s\" must be between 0.0 and 1.0\n",
1103 srand( (unsigned int) (time(NULL) + getpid()) );
1107 out_file_type_subtype = wtap_short_string_to_file_type_subtype(optarg);
1108 if (out_file_type_subtype < 0) {
1109 fprintf(stderr, "editcap: \"%s\" isn't a valid capture file type\n\n",
1111 list_capture_types();
1117 printf("Editcap (Wireshark) %s\n"
1118 "Edit and/or translate the format of capture files.\n"
1119 "See http://www.wireshark.org for more information.\n",
1120 get_ws_vcs_version_info());
1121 print_usage(stdout);
1125 case 'i': /* break capture file based on time interval */
1126 secs_per_block = atoi(optarg);
1127 if (secs_per_block <= 0) {
1128 fprintf(stderr, "editcap: \"%s\" isn't a valid time interval\n\n",
1134 case 'I': /* ignored_bytes at the beginning of the frame for duplications removal */
1135 ignored_bytes = atoi(optarg);
1136 if(ignored_bytes <= 0) {
1137 fprintf(stderr, "editcap: \"%s\" isn't a valid number of bytes to ignore\n", optarg);
1147 keep_em = !keep_em; /* Just invert */
1151 snaplen = (guint32)strtol(optarg, &p, 10);
1152 if (p == optarg || *p != '\0') {
1153 fprintf(stderr, "editcap: \"%s\" isn't a valid snapshot length\n",
1160 set_strict_time_adj(optarg);
1161 do_strict_time_adjustment = TRUE;
1165 set_time_adjustment(optarg);
1169 out_frame_type = wtap_short_string_to_encap(optarg);
1170 if (out_frame_type < 0) {
1171 fprintf(stderr, "editcap: \"%s\" isn't a valid encapsulation type\n\n",
1179 verbose = !verbose; /* Just invert */
1183 show_version(comp_info_str, runtime_info_str);
1184 g_string_free(comp_info_str, TRUE);
1185 g_string_free(runtime_info_str, TRUE);
1191 dup_detect_by_time = TRUE;
1192 dup_window = MAX_DUP_DEPTH;
1193 set_rel_time(optarg);
1196 case '?': /* Bad options if GNU getopt */
1199 list_capture_types();
1205 print_usage(stderr);
1214 fprintf(stderr, "Optind = %i, argc = %i\n", optind, argc);
1217 if ((argc - optind) < 1) {
1218 print_usage(stderr);
1222 if (check_startstop && !stoptime) {
1225 /* XXX: will work until 2035 */
1226 memset(&stoptm,0,sizeof(struct tm));
1227 stoptm.tm_year = 135;
1228 stoptm.tm_mday = 31;
1231 stoptime = mktime(&stoptm);
1234 nstime_set_unset(&block_start);
1236 if (starttime > stoptime) {
1237 fprintf(stderr, "editcap: start time is after the stop time\n");
1241 if (split_packet_count > 0 && secs_per_block > 0) {
1242 fprintf(stderr, "editcap: can't split on both packet count and time interval\n");
1243 fprintf(stderr, "editcap: at the same time\n");
1247 wth = wtap_open_offline(argv[optind], WTAP_TYPE_AUTO, &err, &err_info, FALSE);
1250 fprintf(stderr, "editcap: Can't open %s: %s\n", argv[optind],
1251 wtap_strerror(err));
1253 case WTAP_ERR_UNSUPPORTED:
1254 case WTAP_ERR_BAD_FILE:
1255 fprintf(stderr, "(%s)\n", err_info);
1263 fprintf(stderr, "File %s is a %s capture file.\n", argv[optind],
1264 wtap_file_type_subtype_string(wtap_file_type_subtype(wth)));
1267 shb_hdr = wtap_file_get_shb_info(wth);
1268 idb_inf = wtap_file_get_idb_info(wth);
1271 * Now, process the rest, if any ... we only write if there is an extra
1272 * argument or so ...
1275 if ((argc - optind) >= 2) {
1276 if (out_frame_type == -2)
1277 out_frame_type = wtap_file_encap(wth);
1279 for (i = optind + 2; i < argc; i++)
1280 if (add_selection(argv[i]) == FALSE)
1283 if (dup_detect || dup_detect_by_time) {
1284 for (i = 0; i < dup_window; i++) {
1285 memset(&fd_hash[i].digest, 0, 16);
1287 nstime_set_unset(&fd_hash[i].time);
1291 while (wtap_read(wth, &err, &err_info, &data_offset)) {
1294 phdr = wtap_phdr(wth);
1296 if (read_count == 1) { /* the first packet */
1297 if (split_packet_count > 0 || secs_per_block > 0) {
1298 if (!fileset_extract_prefix_suffix(argv[optind+1], &fprefix, &fsuffix))
1301 filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
1303 filename = g_strdup(argv[optind+1]);
1307 /* If we don't have an application name add Editcap */
1308 if (shb_hdr->shb_user_appl == NULL) {
1309 shb_hdr->shb_user_appl = g_strdup("Editcap " VERSION);
1312 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1313 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1314 FALSE /* compressed */, shb_hdr, idb_inf, &err);
1317 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1318 filename, wtap_strerror(err));
1323 buf = wtap_buf_ptr(wth);
1326 * Not all packets have time stamps. Only process the time
1327 * stamp if we have one.
1329 if (phdr->presence_flags & WTAP_HAS_TS) {
1330 if (nstime_is_unset(&block_start)) {
1331 block_start.secs = phdr->ts.secs;
1332 block_start.nsecs = phdr->ts.nsecs;
1335 if (secs_per_block > 0) {
1336 while ((phdr->ts.secs - block_start.secs > secs_per_block)
1337 || (phdr->ts.secs - block_start.secs == secs_per_block
1338 && phdr->ts.nsecs >= block_start.nsecs )) { /* time for the next file */
1340 if (!wtap_dump_close(pdh, &err)) {
1341 fprintf(stderr, "editcap: Error writing to %s: %s\n",
1342 filename, wtap_strerror(err));
1345 block_start.secs = block_start.secs + secs_per_block; /* reset for next interval */
1347 filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
1351 fprintf(stderr, "Continuing writing in file %s\n", filename);
1353 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1354 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1355 FALSE /* compressed */, shb_hdr, idb_inf, &err);
1358 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1359 filename, wtap_strerror(err));
1366 if (split_packet_count > 0) {
1367 /* time for the next file? */
1368 if (written_count > 0 && written_count % split_packet_count == 0) {
1369 if (!wtap_dump_close(pdh, &err)) {
1370 fprintf(stderr, "editcap: Error writing to %s: %s\n",
1371 filename, wtap_strerror(err));
1376 filename = fileset_get_filename_by_pattern(block_cnt++, phdr, fprefix, fsuffix);
1380 fprintf(stderr, "Continuing writing in file %s\n", filename);
1382 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1383 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1384 FALSE /* compressed */, shb_hdr, idb_inf, &err);
1386 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1387 filename, wtap_strerror(err));
1393 if (check_startstop) {
1395 * Is the packet in the selected timeframe?
1396 * If the packet has no time stamp, the answer is "no".
1398 if (phdr->presence_flags & WTAP_HAS_TS)
1399 ts_okay = (phdr->ts.secs >= starttime) && (phdr->ts.secs < stoptime);
1404 * No selected timeframe, so all packets are "in the
1405 * selected timeframe".
1410 if (ts_okay && ((!selected(count) && !keep_em)
1411 || (selected(count) && keep_em))) {
1413 if (verbose && !dup_detect && !dup_detect_by_time)
1414 fprintf(stderr, "Packet: %u\n", count);
1416 /* We simply write it, perhaps after truncating it; we could
1417 * do other things, like modify it. */
1419 phdr = wtap_phdr(wth);
1422 if (phdr->caplen > snaplen) {
1424 snap_phdr.caplen = snaplen;
1427 if (adjlen && phdr->len > snaplen) {
1429 snap_phdr.len = snaplen;
1436 handle_chopping(chop, &snap_phdr, phdr, &buf, adjlen);
1439 if (phdr->presence_flags & WTAP_HAS_TS) {
1440 /* Do we adjust timestamps to ensure strict chronological
1442 if (do_strict_time_adjustment) {
1443 if (previous_time.secs || previous_time.nsecs) {
1444 if (!strict_time_adj.is_negative) {
1448 current.secs = phdr->ts.secs;
1449 current.nsecs = phdr->ts.nsecs;
1451 nstime_delta(&delta, ¤t, &previous_time);
1453 if (delta.secs < 0 || delta.nsecs < 0) {
1455 * A negative delta indicates that the current packet
1456 * has an absolute timestamp less than the previous packet
1457 * that it is being compared to. This is NOT a normal
1458 * situation since trace files usually have packets in
1459 * chronological order (oldest to newest).
1461 /* fprintf(stderr, "++out of order, need to adjust this packet!\n"); */
1463 snap_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1464 snap_phdr.ts.nsecs = previous_time.nsecs;
1465 if (snap_phdr.ts.nsecs + strict_time_adj.tv.nsecs > ONE_BILLION) {
1467 snap_phdr.ts.secs++;
1468 snap_phdr.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1470 snap_phdr.ts.nsecs += strict_time_adj.tv.nsecs;
1476 * A negative strict time adjustment is requested.
1477 * Unconditionally set each timestamp to previous
1478 * packet's timestamp plus delta.
1481 snap_phdr.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1482 snap_phdr.ts.nsecs = previous_time.nsecs;
1483 if (snap_phdr.ts.nsecs + strict_time_adj.tv.nsecs > ONE_BILLION) {
1485 snap_phdr.ts.secs++;
1486 snap_phdr.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1488 snap_phdr.ts.nsecs += strict_time_adj.tv.nsecs;
1493 previous_time.secs = phdr->ts.secs;
1494 previous_time.nsecs = phdr->ts.nsecs;
1497 /* assume that if the frame's tv_sec is 0, then
1498 * the timestamp isn't supported */
1499 if (phdr->ts.secs > 0 && time_adj.tv.secs != 0) {
1501 if (time_adj.is_negative)
1502 snap_phdr.ts.secs -= time_adj.tv.secs;
1504 snap_phdr.ts.secs += time_adj.tv.secs;
1508 /* assume that if the frame's tv_sec is 0, then
1509 * the timestamp isn't supported */
1510 if (phdr->ts.secs > 0 && time_adj.tv.nsecs != 0) {
1512 if (time_adj.is_negative) { /* subtract */
1513 if (snap_phdr.ts.nsecs < time_adj.tv.nsecs) { /* borrow */
1514 snap_phdr.ts.secs--;
1515 snap_phdr.ts.nsecs += ONE_BILLION;
1517 snap_phdr.ts.nsecs -= time_adj.tv.nsecs;
1519 if (snap_phdr.ts.nsecs + time_adj.tv.nsecs > ONE_BILLION) {
1521 snap_phdr.ts.secs++;
1522 snap_phdr.ts.nsecs += time_adj.tv.nsecs - ONE_BILLION;
1524 snap_phdr.ts.nsecs += time_adj.tv.nsecs;
1531 /* suppress duplicates by packet window */
1533 if (is_duplicate(buf, phdr->caplen)) {
1535 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1536 count, phdr->caplen);
1537 for (i = 0; i < 16; i++)
1538 fprintf(stderr, "%02x",
1539 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1540 fprintf(stderr, "\n");
1547 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1548 count, phdr->caplen);
1549 for (i = 0; i < 16; i++)
1550 fprintf(stderr, "%02x",
1551 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1552 fprintf(stderr, "\n");
1557 if (phdr->presence_flags & WTAP_HAS_TS) {
1558 /* suppress duplicates by time window */
1559 if (dup_detect_by_time) {
1562 current.secs = phdr->ts.secs;
1563 current.nsecs = phdr->ts.nsecs;
1565 if (is_duplicate_rel_time(buf, phdr->caplen, ¤t)) {
1567 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1568 count, phdr->caplen);
1569 for (i = 0; i < 16; i++)
1570 fprintf(stderr, "%02x",
1571 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1572 fprintf(stderr, "\n");
1579 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1580 count, phdr->caplen);
1581 for (i = 0; i < 16; i++)
1582 fprintf(stderr, "%02x",
1583 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1584 fprintf(stderr, "\n");
1590 /* Random error mutation */
1591 if (err_prob > 0.0) {
1592 int real_data_start = 0;
1594 /* Protect non-protocol data */
1595 if (wtap_file_type_subtype(wth) == WTAP_FILE_TYPE_SUBTYPE_CATAPULT_DCT2000)
1596 real_data_start = find_dct2000_real_data(buf);
1598 for (i = real_data_start; i < (int) phdr->caplen; i++) {
1599 if (rand() <= err_prob * RAND_MAX) {
1600 err_type = rand() / (RAND_MAX / ERR_WT_TOTAL + 1);
1602 if (err_type < ERR_WT_BIT) {
1603 buf[i] ^= 1 << (rand() / (RAND_MAX / 8 + 1));
1604 err_type = ERR_WT_TOTAL;
1606 err_type -= ERR_WT_BYTE;
1609 if (err_type < ERR_WT_BYTE) {
1610 buf[i] = rand() / (RAND_MAX / 255 + 1);
1611 err_type = ERR_WT_TOTAL;
1613 err_type -= ERR_WT_BYTE;
1616 if (err_type < ERR_WT_ALNUM) {
1617 buf[i] = ALNUM_CHARS[rand() / (RAND_MAX / ALNUM_LEN + 1)];
1618 err_type = ERR_WT_TOTAL;
1620 err_type -= ERR_WT_ALNUM;
1623 if (err_type < ERR_WT_FMT) {
1624 if ((unsigned int)i < phdr->caplen - 2)
1625 g_strlcpy((char*) &buf[i], "%s", 2);
1626 err_type = ERR_WT_TOTAL;
1628 err_type -= ERR_WT_FMT;
1631 if (err_type < ERR_WT_AA) {
1632 for (j = i; j < (int) phdr->caplen; j++)
1640 if (!wtap_dump(pdh, phdr, buf, &err, &err_info)) {
1642 case WTAP_ERR_UNWRITABLE_ENCAP:
1644 * This is a problem with the particular frame we're
1645 * writing and the file type and subtype we're
1646 * writing; note that, and report the frame number
1647 * and file type/subtype.
1650 "editcap: Frame %u of \"%s\" has a network type that can't be saved in a \"%s\" file.\n",
1651 read_count, argv[optind],
1652 wtap_file_type_subtype_string(out_file_type_subtype));
1655 case WTAP_ERR_PACKET_TOO_LARGE:
1657 * This is a problem with the particular frame we're
1658 * writing and the file type and subtype we're
1659 * writing; note that, and report the frame number
1660 * and file type/subtype.
1663 "editcap: Frame %u of \"%s\" is too large for a \"%s\" file.\n",
1664 read_count, argv[optind],
1665 wtap_file_type_subtype_string(out_file_type_subtype));
1668 case WTAP_ERR_UNWRITABLE_REC_TYPE:
1670 * This is a problem with the particular record we're
1671 * writing and the file type and subtype we're
1672 * writing; note that, and report the record number
1673 * and file type/subtype.
1676 "editcap: Record %u of \"%s\" has a record type that can't be saved in a \"%s\" file.\n",
1677 read_count, argv[optind],
1678 wtap_file_type_subtype_string(out_file_type_subtype));
1681 case WTAP_ERR_UNWRITABLE_REC_DATA:
1683 * This is a problem with the particular record we're
1684 * writing and the file type and subtype we're
1685 * writing; note that, and report the record number
1686 * and file type/subtype.
1689 "editcap: Record %u of \"%s\" has data that can't be saved in a \"%s\" file.\n(%s)\n",
1690 read_count, argv[optind],
1691 wtap_file_type_subtype_string(out_file_type_subtype),
1697 fprintf(stderr, "editcap: Error writing to %s: %s\n",
1698 filename, wtap_strerror(err));
1712 /* Print a message noting that the read failed somewhere along the
1715 "editcap: An error occurred while reading \"%s\": %s.\n",
1716 argv[optind], wtap_strerror(err));
1718 case WTAP_ERR_UNSUPPORTED:
1719 case WTAP_ERR_BAD_FILE:
1720 fprintf(stderr, "(%s)\n", err_info);
1727 /* No valid packages found, open the outfile so we can write an
1730 filename = g_strdup(argv[optind+1]);
1732 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
1733 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)): wtap_snapshot_length(wth),
1734 FALSE /* compressed */, shb_hdr, idb_inf, &err);
1736 fprintf(stderr, "editcap: Can't open or create %s: %s\n",
1737 filename, wtap_strerror(err));
1745 if (!wtap_dump_close(pdh, &err)) {
1746 fprintf(stderr, "editcap: Error writing to %s: %s\n", filename,
1747 wtap_strerror(err));
1755 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate window of %i packets.\n",
1756 count - 1, plurality(count - 1, "", "s"), duplicate_count,
1757 plurality(duplicate_count, "", "s"), dup_window);
1758 } else if (dup_detect_by_time) {
1759 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate time window equal to or less than %ld.%09ld seconds.\n",
1760 count - 1, plurality(count - 1, "", "s"), duplicate_count,
1761 plurality(duplicate_count, "", "s"),
1762 (long)relative_time_window.secs,
1763 (long int)relative_time_window.nsecs);
1769 /* Skip meta-information read from file to return offset of real
1772 find_dct2000_real_data(guint8 *buf)
1776 for (n = 0; buf[n] != '\0'; n++); /* Context name */
1778 n++; /* Context port number */
1779 for (; buf[n] != '\0'; n++); /* Timestamp */
1781 for (; buf[n] != '\0'; n++); /* Protocol name */
1783 for (; buf[n] != '\0'; n++); /* Variant number (as string) */
1785 for (; buf[n] != '\0'; n++); /* Outhdr (as string) */
1787 n += 2; /* Direction & encap */
1793 * We support up to 2 chopping regions in a single pass: one specified by the
1794 * positive chop length, and one by the negative chop length.
1797 handle_chopping(chop_t chop, struct wtap_pkthdr *out_phdr,
1798 const struct wtap_pkthdr *in_phdr, guint8 **buf,
1801 /* Only packets can be chopped. */
1802 if (in_phdr->rec_type != REC_TYPE_PACKET)
1805 /* If we're not chopping anything from one side, then the offset for that
1806 * side is meaningless. */
1807 if (chop.len_begin == 0)
1808 chop.off_begin_pos = chop.off_begin_neg = 0;
1809 if (chop.len_end == 0)
1810 chop.off_end_pos = chop.off_end_neg = 0;
1812 if (chop.off_begin_neg < 0) {
1813 chop.off_begin_pos += in_phdr->caplen + chop.off_begin_neg;
1814 chop.off_begin_neg = 0;
1816 if (chop.off_end_pos > 0) {
1817 chop.off_end_neg += chop.off_end_pos - in_phdr->caplen;
1818 chop.off_end_pos = 0;
1821 /* If we've crossed chopping regions, swap them */
1822 if (chop.len_begin && chop.len_end) {
1823 if (chop.off_begin_pos > ((int)in_phdr->caplen + chop.off_end_neg)) {
1824 int tmp_len, tmp_off;
1826 tmp_off = in_phdr->caplen + chop.off_end_neg + chop.len_end;
1827 tmp_len = -chop.len_end;
1829 chop.off_end_neg = chop.len_begin + chop.off_begin_pos - in_phdr->caplen;
1830 chop.len_end = -chop.len_begin;
1832 chop.len_begin = tmp_len;
1833 chop.off_begin_pos = tmp_off;
1837 /* Make sure we don't chop off more than we have available */
1838 if (in_phdr->caplen < (guint32)(chop.off_begin_pos - chop.off_end_neg)) {
1842 if ((guint32)(chop.len_begin - chop.len_end) >
1843 (in_phdr->caplen - (guint32)(chop.off_begin_pos - chop.off_end_neg))) {
1844 chop.len_begin = in_phdr->caplen - (chop.off_begin_pos - chop.off_end_neg);
1848 /* Handle chopping from the beginning. Note that if a beginning offset
1849 * was specified, we need to keep that piece */
1850 if (chop.len_begin > 0) {
1851 *out_phdr = *in_phdr;
1853 if (chop.off_begin_pos > 0) {
1854 memmove(*buf + chop.off_begin_pos,
1855 *buf + chop.off_begin_pos + chop.len_begin,
1856 out_phdr->caplen - chop.len_begin);
1858 *buf += chop.len_begin;
1860 out_phdr->caplen -= chop.len_begin;
1863 if (in_phdr->len > (guint32)chop.len_begin)
1864 out_phdr->len -= chop.len_begin;
1871 /* Handle chopping from the end. Note that if an ending offset was
1872 * specified, we need to keep that piece */
1873 if (chop.len_end < 0) {
1874 *out_phdr = *in_phdr;
1876 if (chop.off_end_neg < 0) {
1877 memmove(*buf + (gint)out_phdr->caplen + (chop.len_end + chop.off_end_neg),
1878 *buf + (gint)out_phdr->caplen + chop.off_end_neg,
1881 out_phdr->caplen += chop.len_end;
1884 if (((signed int) in_phdr->len + chop.len_end) > 0)
1885 out_phdr->len += chop.len_end;
1889 /*in_phdr = out_phdr;*/
1894 * Editor modelines - http://www.wireshark.org/tools/modelines.html
1899 * indent-tabs-mode: nil
1902 * vi: set shiftwidth=4 tabstop=8 expandtab:
1903 * :indentSize=4:tabSize=8:noTabs=true: