2 * Edit capture files. We can delete packets, adjust timestamps, or
3 * simply convert from one format to another format.
5 * Originally written by Richard Sharpe.
6 * Improved by Guy Harris.
7 * Further improved by Richard Sharpe.
9 * Copyright 2013, Richard Sharpe <realrichardsharpe[AT]gmail.com>
11 * Wireshark - Network traffic analyzer
12 * By Gerald Combs <gerald@wireshark.org>
13 * Copyright 1998 Gerald Combs
15 * SPDX-License-Identifier: GPL-2.0-or-later
26 * Just make sure we include the prototype for strptime as well
27 * (needed for glibc 2.2) but make sure we do this only if not
46 #include <wiretap/wtap.h>
48 #include "epan/etypes.h"
49 #include "epan/dissectors/packet-ieee80211-radiotap-defs.h"
51 #ifndef HAVE_GETOPT_LONG
52 #include "wsutil/wsgetopt.h"
56 #include <wsutil/unicode-utils.h>
57 #include <process.h> /* getpid */
62 # include "wsutil/strptime.h"
65 #include <wsutil/crash_info.h>
66 #include <wsutil/clopts_common.h>
67 #include <wsutil/cmdarg_err.h>
68 #include <wsutil/filesystem.h>
69 #include <wsutil/file_util.h>
70 #include <wsutil/wsgcrypt.h>
71 #include <wsutil/plugins.h>
72 #include <wsutil/privileges.h>
73 #include <wsutil/report_message.h>
74 #include <wsutil/strnatcmp.h>
75 #include <wsutil/str_util.h>
76 #include <version_info.h>
77 #include <wsutil/pint.h>
78 #include <wsutil/strtoi.h>
79 #include <wiretap/wtap_opttypes.h>
80 #include <wiretap/pcapng.h>
82 #include "ui/failure_message.h"
84 #include "ringbuffer.h" /* For RINGBUFFER_MAX_NUM_FILES */
86 #define INVALID_OPTION 1
87 #define INVALID_FILE 2
88 #define CANT_EXTRACT_PREFIX 2
93 * Some globals so we can pass things to various routines
102 * Duplicate frame detection
104 typedef struct _fd_hash_t {
110 #define DEFAULT_DUP_DEPTH 5 /* Used with -d */
111 #define MAX_DUP_DEPTH 1000000 /* the maximum window (and actual size of fd_hash[]) for de-duplication */
113 static fd_hash_t fd_hash[MAX_DUP_DEPTH];
114 static int dup_window = DEFAULT_DUP_DEPTH;
115 static int cur_dup_entry = 0;
117 static guint32 ignored_bytes = 0; /* Used with -I */
119 #define ONE_BILLION 1000000000
121 /* Weights of different errors we can introduce */
122 /* We should probably make these command-line arguments */
123 /* XXX - Should we add a bit-level error? */
124 #define ERR_WT_BIT 5 /* Flip a random bit */
125 #define ERR_WT_BYTE 5 /* Substitute a random byte */
126 #define ERR_WT_ALNUM 5 /* Substitute a random character in [A-Za-z0-9] */
127 #define ERR_WT_FMT 2 /* Substitute "%s" */
128 #define ERR_WT_AA 1 /* Fill the remainder of the buffer with 0xAA */
129 #define ERR_WT_TOTAL (ERR_WT_BIT + ERR_WT_BYTE + ERR_WT_ALNUM + ERR_WT_FMT + ERR_WT_AA)
131 #define ALNUM_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
132 #define ALNUM_LEN (sizeof(ALNUM_CHARS) - 1)
134 struct time_adjustment {
139 typedef struct _chop_t {
149 /* Table of user comments */
150 GTree *frames_user_comments = NULL;
152 #define MAX_SELECTIONS 512
153 static struct select_item selectfrm[MAX_SELECTIONS];
154 static guint max_selected = 0;
155 static int keep_em = 0;
156 #ifdef PCAP_NG_DEFAULT
157 static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAPNG; /* default to pcapng */
159 static int out_file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PCAP; /* default to pcap */
161 static int out_frame_type = -2; /* Leave frame type alone */
162 static int verbose = 0; /* Not so verbose */
163 static struct time_adjustment time_adj = {NSTIME_INIT_ZERO, 0}; /* no adjustment */
164 static nstime_t relative_time_window = NSTIME_INIT_ZERO; /* de-dup time window */
165 static double err_prob = -1.0;
166 static time_t starttime = 0;
167 static time_t stoptime = 0;
168 static gboolean check_startstop = FALSE;
169 static gboolean rem_vlan = FALSE;
170 static gboolean dup_detect = FALSE;
171 static gboolean dup_detect_by_time = FALSE;
172 static gboolean skip_radiotap = FALSE;
174 static int do_strict_time_adjustment = FALSE;
175 static struct time_adjustment strict_time_adj = {NSTIME_INIT_ZERO, 0}; /* strict time adjustment */
176 static nstime_t previous_time = NSTIME_INIT_ZERO; /* previous time */
178 static int find_dct2000_real_data(guint8 *buf);
179 static void handle_chopping(chop_t chop, wtap_packet_header *out_phdr,
180 const wtap_packet_header *in_phdr, guint8 **buf,
184 abs_time_to_str_with_sec_resolution(const nstime_t *abs_time)
187 gchar *buf = (gchar *)g_malloc(16);
189 tmp = localtime(&abs_time->secs);
192 g_snprintf(buf, 16, "%d%02d%02d%02d%02d%02d",
207 fileset_get_filename_by_pattern(guint idx, const wtap_rec *rec,
208 gchar *fprefix, gchar *fsuffix)
214 g_snprintf(filenum, sizeof(filenum), "%05u", idx % RINGBUFFER_MAX_NUM_FILES);
215 if (rec->presence_flags & WTAP_HAS_TS) {
216 timestr = abs_time_to_str_with_sec_resolution(&rec->ts);
217 abs_str = g_strconcat(fprefix, "_", filenum, "_", timestr, fsuffix, NULL);
220 abs_str = g_strconcat(fprefix, "_", filenum, fsuffix, NULL);
226 fileset_extract_prefix_suffix(const char *fname, gchar **fprefix, gchar **fsuffix)
228 char *pfx, *last_pathsep;
231 save_file = g_strdup(fname);
232 if (save_file == NULL) {
233 fprintf(stderr, "editcap: Out of memory\n");
237 last_pathsep = strrchr(save_file, G_DIR_SEPARATOR);
238 pfx = strrchr(save_file,'.');
239 if (pfx != NULL && (last_pathsep == NULL || pfx > last_pathsep)) {
240 /* The pathname has a "." in it, and it's in the last component
241 * of the pathname (because there is either only one component,
242 * i.e. last_pathsep is null as there are no path separators,
243 * or the "." is after the path separator before the last
246 * Treat it as a separator between the rest of the file name and
247 * the file name suffix, and arrange that the names given to the
248 * ring buffer files have the specified suffix, i.e. put the
249 * changing part of the name *before* the suffix. */
251 *fprefix = g_strdup(save_file);
252 pfx[0] = '.'; /* restore capfile_name */
253 *fsuffix = g_strdup(pfx);
255 /* Either there's no "." in the pathname, or it's in a directory
256 * component, so the last component has no suffix. */
257 *fprefix = g_strdup(save_file);
264 /* Add a selection item, a simple parser for now */
266 add_selection(char *sel, guint* max_selection)
271 if (max_selected >= MAX_SELECTIONS) {
272 /* Let the user know we stopped selecting */
273 fprintf(stderr, "Out of room for packet selections.\n");
278 fprintf(stderr, "Add_Selected: %s\n", sel);
280 if ((locn = strchr(sel, '-')) == NULL) { /* No dash, so a single number? */
282 fprintf(stderr, "Not inclusive ...");
284 selectfrm[max_selected].inclusive = FALSE;
285 selectfrm[max_selected].first = get_guint32(sel, "packet number");
286 if (selectfrm[max_selected].first > *max_selection)
287 *max_selection = selectfrm[max_selected].first;
290 fprintf(stderr, " %u\n", selectfrm[max_selected].first);
293 fprintf(stderr, "Inclusive ...");
295 *locn = '\0'; /* split the range */
297 selectfrm[max_selected].inclusive = TRUE;
298 selectfrm[max_selected].first = get_guint32(sel, "beginning of packet range");
299 selectfrm[max_selected].second = get_guint32(next, "end of packet range");
301 if (selectfrm[max_selected].second == 0)
303 /* Not a valid number, presume all */
304 selectfrm[max_selected].second = *max_selection = G_MAXUINT;
306 else if (selectfrm[max_selected].second > *max_selection)
307 *max_selection = selectfrm[max_selected].second;
310 fprintf(stderr, " %u, %u\n", selectfrm[max_selected].first,
311 selectfrm[max_selected].second);
318 /* Was the packet selected? */
321 selected(guint recno)
325 for (i = 0; i < max_selected; i++) {
326 if (selectfrm[i].inclusive) {
327 if (selectfrm[i].first <= recno && selectfrm[i].second >= recno)
330 if (recno == selectfrm[i].first)
339 set_time_adjustment(char *optarg_str_p)
348 /* skip leading whitespace */
349 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
352 /* check for a negative adjustment */
353 if (*optarg_str_p == '-') {
354 time_adj.is_negative = 1;
358 /* collect whole number of seconds, if any */
359 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
363 val = strtol(optarg_str_p, &frac, 10);
364 if (frac == NULL || frac == optarg_str_p
365 || val == LONG_MIN || val == LONG_MAX) {
366 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
370 if (val < 0) { /* implies '--' since we caught '-' above */
371 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
376 time_adj.tv.secs = val;
378 /* now collect the partial seconds, if any */
379 if (*frac != '\0') { /* chars left, so get fractional part */
380 val = strtol(&(frac[1]), &end, 10);
381 /* if more than 9 fractional digits truncate to 9 */
382 if ((end - &(frac[1])) > 9) {
383 frac[10] = 't'; /* 't' for truncate */
384 val = strtol(&(frac[1]), &end, 10);
386 if (*frac != '.' || end == NULL || end == frac || val < 0
387 || val >= ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
388 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
393 return TRUE; /* no fractional digits */
396 /* adjust fractional portion from fractional to numerator
397 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
398 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
399 while(frac_digits < 9) { /* this is frac of 10^9 */
404 time_adj.tv.nsecs = (int)val;
409 set_strict_time_adj(char *optarg_str_p)
418 /* skip leading whitespace */
419 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
423 * check for a negative adjustment
424 * A negative strict adjustment value is a flag
425 * to adjust all frames by the specifed delta time.
427 if (*optarg_str_p == '-') {
428 strict_time_adj.is_negative = 1;
432 /* collect whole number of seconds, if any */
433 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
437 val = strtol(optarg_str_p, &frac, 10);
438 if (frac == NULL || frac == optarg_str_p
439 || val == LONG_MIN || val == LONG_MAX) {
440 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
444 if (val < 0) { /* implies '--' since we caught '-' above */
445 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
450 strict_time_adj.tv.secs = val;
452 /* now collect the partial seconds, if any */
453 if (*frac != '\0') { /* chars left, so get fractional part */
454 val = strtol(&(frac[1]), &end, 10);
455 /* if more than 9 fractional digits truncate to 9 */
456 if ((end - &(frac[1])) > 9) {
457 frac[10] = 't'; /* 't' for truncate */
458 val = strtol(&(frac[1]), &end, 10);
460 if (*frac != '.' || end == NULL || end == frac || val < 0
461 || val >= ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
462 fprintf(stderr, "editcap: \"%s\" isn't a valid time adjustment\n",
467 return TRUE; /* no fractional digits */
470 /* adjust fractional portion from fractional to numerator
471 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
472 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
473 while(frac_digits < 9) { /* this is frac of 10^9 */
478 strict_time_adj.tv.nsecs = (int)val;
483 set_rel_time(char *optarg_str_p)
492 /* skip leading whitespace */
493 while (*optarg_str_p == ' ' || *optarg_str_p == '\t')
496 /* ignore negative adjustment */
497 if (*optarg_str_p == '-')
500 /* collect whole number of seconds, if any */
501 if (*optarg_str_p == '.') { /* only fractional (i.e., .5 is ok) */
505 val = strtol(optarg_str_p, &frac, 10);
506 if (frac == NULL || frac == optarg_str_p
507 || val == LONG_MIN || val == LONG_MAX) {
508 fprintf(stderr, "1: editcap: \"%s\" isn't a valid rel time value\n",
512 if (val < 0) { /* implies '--' since we caught '-' above */
513 fprintf(stderr, "2: editcap: \"%s\" isn't a valid rel time value\n",
518 relative_time_window.secs = val;
520 /* now collect the partial seconds, if any */
521 if (*frac != '\0') { /* chars left, so get fractional part */
522 val = strtol(&(frac[1]), &end, 10);
523 /* if more than 9 fractional digits truncate to 9 */
524 if ((end - &(frac[1])) > 9) {
525 frac[10] = 't'; /* 't' for truncate */
526 val = strtol(&(frac[1]), &end, 10);
528 if (*frac != '.' || end == NULL || end == frac || val < 0
529 || val >= ONE_BILLION || val == LONG_MIN || val == LONG_MAX) {
530 fprintf(stderr, "3: editcap: \"%s\" isn't a valid rel time value\n",
535 return TRUE; /* no fractional digits */
538 /* adjust fractional portion from fractional to numerator
539 * e.g., in "1.5" from 5 to 500000000 since .5*10^9 = 500000000 */
540 frac_digits = end - frac - 1; /* fractional digit count (remember '.') */
541 while(frac_digits < 9) { /* this is frac of 10^9 */
546 relative_time_window.nsecs = (int)val;
550 #define LINUX_SLL_OFFSETP 14
553 sll_remove_vlan_info(guint8* fd, guint32* len) {
554 if (pntoh16(fd + LINUX_SLL_OFFSETP) == ETHERTYPE_VLAN) {
556 /* point to start of vlan */
557 fd = fd + LINUX_SLL_OFFSETP;
558 /* bytes to read after vlan info */
559 rest_len = *len - (LINUX_SLL_OFFSETP + VLAN_SIZE);
560 /* remove vlan info from packet */
561 memmove(fd, fd + VLAN_SIZE, rest_len);
567 remove_vlan_info(const wtap_packet_header *phdr, guint8* fd, guint32* len) {
568 switch (phdr->pkt_encap) {
570 sll_remove_vlan_info(fd, len);
573 /* no support for current pkt_encap */
579 is_duplicate(guint8* fd, guint32 len) {
581 const struct ieee80211_radiotap_header* tap_header;
583 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
584 guint32 offset = ignored_bytes;
588 if (len <= ignored_bytes) {
592 /* Get the size of radiotap header and use that as offset (-p option) */
593 if (skip_radiotap == TRUE) {
594 tap_header = (const struct ieee80211_radiotap_header*)fd;
595 offset = pletoh16(&tap_header->it_len);
600 new_fd = &fd[offset];
601 new_len = len - (offset);
604 if (cur_dup_entry >= dup_window)
607 /* Calculate our digest */
608 gcry_md_hash_buffer(GCRY_MD_MD5, fd_hash[cur_dup_entry].digest, new_fd, new_len);
610 fd_hash[cur_dup_entry].len = len;
612 /* Look for duplicates */
613 for (i = 0; i < dup_window; i++) {
614 if (i == cur_dup_entry)
617 if (fd_hash[i].len == fd_hash[cur_dup_entry].len
618 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
627 is_duplicate_rel_time(guint8* fd, guint32 len, const nstime_t *current) {
630 /*Hint to ignore some bytes at the start of the frame for the digest calculation(-I option) */
631 guint32 offset = ignored_bytes;
635 if (len <= ignored_bytes) {
639 new_fd = &fd[offset];
640 new_len = len - (offset);
643 if (cur_dup_entry >= dup_window)
646 /* Calculate our digest */
647 gcry_md_hash_buffer(GCRY_MD_MD5, fd_hash[cur_dup_entry].digest, new_fd, new_len);
649 fd_hash[cur_dup_entry].len = len;
650 fd_hash[cur_dup_entry].frame_time.secs = current->secs;
651 fd_hash[cur_dup_entry].frame_time.nsecs = current->nsecs;
654 * Look for relative time related duplicates.
655 * This is hopefully a reasonably efficient mechanism for
656 * finding duplicates by rel time in the fd_hash[] cache.
657 * We check starting from the most recently added hash
658 * entries and work backwards towards older packets.
659 * This approach allows the dup test to be terminated
660 * when the relative time of a cached entry is found to
661 * be beyond the dup time window.
663 * Of course this assumes that the input trace file is
664 * "well-formed" in the sense that the packet timestamps are
665 * in strict chronologically increasing order (which is NOT
666 * always the case!!).
668 * The fd_hash[] table was deliberately created large (1,000,000).
669 * Looking for time related duplicates in large trace files with
670 * non-fractional dup time window values can potentially take
671 * a long time to complete.
674 for (i = cur_dup_entry - 1;; i--) {
681 if (i == cur_dup_entry) {
683 * We've decremented back to where we started.
689 if (nstime_is_unset(&(fd_hash[i].frame_time))) {
691 * We've decremented to an unused fd_hash[] entry.
697 nstime_delta(&delta, current, &fd_hash[i].frame_time);
699 if (delta.secs < 0 || delta.nsecs < 0) {
701 * A negative delta implies that the current packet
702 * has an absolute timestamp less than the cached packet
703 * that it is being compared to. This is NOT a normal
704 * situation since trace files usually have packets in
705 * chronological order (oldest to newest).
707 * There are several possible ways to deal with this:
708 * 1. 'continue' dup checking with the next cached frame.
709 * 2. 'break' from looking for a duplicate of the current frame.
710 * 3. Take the absolute value of the delta and see if that
711 * falls within the specifed dup time window.
713 * Currently this code does option 1. But it would pretty
714 * easy to add yet-another-editcap-option to select one of
715 * the other behaviors for dealing with out-of-sequence
721 cmp = nstime_cmp(&delta, &relative_time_window);
725 * The delta time indicates that we are now looking at
726 * cached packets beyond the specified dup time window.
730 } else if (fd_hash[i].len == fd_hash[cur_dup_entry].len
731 && memcmp(fd_hash[i].digest, fd_hash[cur_dup_entry].digest, 16) == 0) {
740 print_usage(FILE *output)
742 fprintf(output, "\n");
743 fprintf(output, "Usage: editcap [options] ... <infile> <outfile> [ <packet#>[-<packet#>] ... ]\n");
744 fprintf(output, "\n");
745 fprintf(output, "<infile> and <outfile> must both be present.\n");
746 fprintf(output, "A single packet or a range of packets can be selected.\n");
747 fprintf(output, "\n");
748 fprintf(output, "Packet selection:\n");
749 fprintf(output, " -r keep the selected packets; default is to delete them.\n");
750 fprintf(output, " -A <start time> only output packets whose timestamp is after (or equal\n");
751 fprintf(output, " to) the given time (format as YYYY-MM-DD hh:mm:ss).\n");
752 fprintf(output, " -B <stop time> only output packets whose timestamp is before the\n");
753 fprintf(output, " given time (format as YYYY-MM-DD hh:mm:ss).\n");
754 fprintf(output, "\n");
755 fprintf(output, "Duplicate packet removal:\n");
756 fprintf(output, " --novlan remove vlan info from packets before checking for duplicates.\n");
757 fprintf(output, " -d remove packet if duplicate (window == %d).\n", DEFAULT_DUP_DEPTH);
758 fprintf(output, " -D <dup window> remove packet if duplicate; configurable <dup window>.\n");
759 fprintf(output, " Valid <dup window> values are 0 to %d.\n", MAX_DUP_DEPTH);
760 fprintf(output, " NOTE: A <dup window> of 0 with -v (verbose option) is\n");
761 fprintf(output, " useful to print MD5 hashes.\n");
762 fprintf(output, " -w <dup time window> remove packet if duplicate packet is found EQUAL TO OR\n");
763 fprintf(output, " LESS THAN <dup time window> prior to current packet.\n");
764 fprintf(output, " A <dup time window> is specified in relative seconds\n");
765 fprintf(output, " (e.g. 0.000001).\n");
766 fprintf(output, " NOTE: The use of the 'Duplicate packet removal' options with\n");
767 fprintf(output, " other editcap options except -v may not always work as expected.\n");
768 fprintf(output, " Specifically the -r, -t or -S options will very likely NOT have the\n");
769 fprintf(output, " desired effect if combined with the -d, -D or -w.\n");
770 fprintf(output, " --skip-radiotap-header skip radiotap header when checking for packet duplicates.\n");
771 fprintf(output, " Useful when processing packets captured by multiple radios\n");
772 fprintf(output, " on the same channel in the vicinity of each other.\n");
773 fprintf(output, "\n");
774 fprintf(output, "Packet manipulation:\n");
775 fprintf(output, " -s <snaplen> truncate each packet to max. <snaplen> bytes of data.\n");
776 fprintf(output, " -C [offset:]<choplen> chop each packet by <choplen> bytes. Positive values\n");
777 fprintf(output, " chop at the packet beginning, negative values at the\n");
778 fprintf(output, " packet end. If an optional offset precedes the length,\n");
779 fprintf(output, " then the bytes chopped will be offset from that value.\n");
780 fprintf(output, " Positive offsets are from the packet beginning,\n");
781 fprintf(output, " negative offsets are from the packet end. You can use\n");
782 fprintf(output, " this option more than once, allowing up to 2 chopping\n");
783 fprintf(output, " regions within a packet provided that at least 1\n");
784 fprintf(output, " choplen is positive and at least 1 is negative.\n");
785 fprintf(output, " -L adjust the frame (i.e. reported) length when chopping\n");
786 fprintf(output, " and/or snapping.\n");
787 fprintf(output, " -t <time adjustment> adjust the timestamp of each packet.\n");
788 fprintf(output, " <time adjustment> is in relative seconds (e.g. -0.5).\n");
789 fprintf(output, " -S <strict adjustment> adjust timestamp of packets if necessary to ensure\n");
790 fprintf(output, " strict chronological increasing order. The <strict\n");
791 fprintf(output, " adjustment> is specified in relative seconds with\n");
792 fprintf(output, " values of 0 or 0.000001 being the most reasonable.\n");
793 fprintf(output, " A negative adjustment value will modify timestamps so\n");
794 fprintf(output, " that each packet's delta time is the absolute value\n");
795 fprintf(output, " of the adjustment specified. A value of -0 will set\n");
796 fprintf(output, " all packets to the timestamp of the first packet.\n");
797 fprintf(output, " -E <error probability> set the probability (between 0.0 and 1.0 incl.) that\n");
798 fprintf(output, " a particular packet byte will be randomly changed.\n");
799 fprintf(output, " -o <change offset> When used in conjunction with -E, skip some bytes from the\n");
800 fprintf(output, " beginning of the packet. This allows one to preserve some\n");
801 fprintf(output, " bytes, in order to have some headers untouched.\n");
802 fprintf(output, " --seed <seed> When used in conjunction with -E, set the seed to use for\n");
803 fprintf(output, " the pseudo-random number generator. This allows one to\n");
804 fprintf(output, " repeat a particular sequence of errors.\n");
805 fprintf(output, " -I <bytes to ignore> ignore the specified number of bytes at the beginning\n");
806 fprintf(output, " of the frame during MD5 hash calculation, unless the\n");
807 fprintf(output, " frame is too short, then the full frame is used.\n");
808 fprintf(output, " Useful to remove duplicated packets taken on\n");
809 fprintf(output, " several routers (different mac addresses for\n");
810 fprintf(output, " example).\n");
811 fprintf(output, " e.g. -I 26 in case of Ether/IP will ignore\n");
812 fprintf(output, " ether(14) and IP header(20 - 4(src ip) - 4(dst ip)).\n");
813 fprintf(output, " -a <framenum>:<comment> Add or replace comment for given frame number\n");
814 fprintf(output, "\n");
815 fprintf(output, "Output File(s):\n");
816 fprintf(output, " -c <packets per file> split the packet output to different files based on\n");
817 fprintf(output, " uniform packet counts with a maximum of\n");
818 fprintf(output, " <packets per file> each.\n");
819 fprintf(output, " -i <seconds per file> split the packet output to different files based on\n");
820 fprintf(output, " uniform time intervals with a maximum of\n");
821 fprintf(output, " <seconds per file> each.\n");
822 fprintf(output, " -F <capture type> set the output file type; default is pcapng. An empty\n");
823 fprintf(output, " \"-F\" option will list the file types.\n");
824 fprintf(output, " -T <encap type> set the output file encapsulation type; default is the\n");
825 fprintf(output, " same as the input file. An empty \"-T\" option will\n");
826 fprintf(output, " list the encapsulation types.\n");
827 fprintf(output, "\n");
828 fprintf(output, "Miscellaneous:\n");
829 fprintf(output, " -h display this help and exit.\n");
830 fprintf(output, " -v verbose output.\n");
831 fprintf(output, " If -v is used with any of the 'Duplicate Packet\n");
832 fprintf(output, " Removal' options (-d, -D or -w) then Packet lengths\n");
833 fprintf(output, " and MD5 hashes are printed to standard-error.\n");
837 const char *sstr; /* The short string */
838 const char *lstr; /* The long string */
842 string_compare(gconstpointer a, gconstpointer b)
844 return strcmp(((const struct string_elem *)a)->sstr,
845 ((const struct string_elem *)b)->sstr);
849 string_nat_compare(gconstpointer a, gconstpointer b)
851 return ws_ascii_strnatcmp(((const struct string_elem *)a)->sstr,
852 ((const struct string_elem *)b)->sstr);
856 string_elem_print(gpointer data, gpointer stream_ptr)
858 fprintf((FILE *) stream_ptr, " %s - %s\n",
859 ((struct string_elem *)data)->sstr,
860 ((struct string_elem *)data)->lstr);
864 list_capture_types(FILE *stream) {
866 struct string_elem *captypes;
869 captypes = g_new(struct string_elem,WTAP_NUM_FILE_TYPES_SUBTYPES);
870 fprintf(stream, "editcap: The available capture file types for the \"-F\" flag are:\n");
871 for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
872 if (wtap_dump_can_open(i)) {
873 captypes[i].sstr = wtap_file_type_subtype_short_string(i);
874 captypes[i].lstr = wtap_file_type_subtype_string(i);
875 list = g_slist_insert_sorted(list, &captypes[i], string_compare);
878 g_slist_foreach(list, string_elem_print, stream);
884 list_encap_types(FILE *stream) {
886 struct string_elem *encaps;
889 encaps = (struct string_elem *)g_malloc(sizeof(struct string_elem) * WTAP_NUM_ENCAP_TYPES);
890 fprintf(stream, "editcap: The available encapsulation types for the \"-T\" flag are:\n");
891 for (i = 0; i < WTAP_NUM_ENCAP_TYPES; i++) {
892 encaps[i].sstr = wtap_encap_short_string(i);
893 if (encaps[i].sstr != NULL) {
894 encaps[i].lstr = wtap_encap_string(i);
895 list = g_slist_insert_sorted(list, &encaps[i], string_nat_compare);
898 g_slist_foreach(list, string_elem_print, stream);
904 framenum_compare(gconstpointer a, gconstpointer b, gpointer user_data _U_)
906 if (GPOINTER_TO_UINT(a) < GPOINTER_TO_UINT(b))
909 if (GPOINTER_TO_UINT(a) > GPOINTER_TO_UINT(b))
916 * General errors and warnings are reported with an console message
920 failure_warning_message(const char *msg_format, va_list ap)
922 fprintf(stderr, "editcap: ");
923 vfprintf(stderr, msg_format, ap);
924 fprintf(stderr, "\n");
928 * Report additional information for an error in command-line arguments.
931 failure_message_cont(const char *msg_format, va_list ap)
933 vfprintf(stderr, msg_format, ap);
934 fprintf(stderr, "\n");
938 editcap_dump_open(const char *filename, guint32 snaplen,
940 wtapng_iface_descriptions_t *idb_inf,
941 GArray* nrb_hdrs, int *write_err)
945 if (strcmp(filename, "-") == 0) {
946 /* Write to the standard output. */
947 pdh = wtap_dump_open_stdout_ng(out_file_type_subtype, out_frame_type,
948 snaplen, FALSE /* compressed */,
949 shb_hdrs, idb_inf, nrb_hdrs, write_err);
951 pdh = wtap_dump_open_ng(filename, out_file_type_subtype, out_frame_type,
952 snaplen, FALSE /* compressed */,
953 shb_hdrs, idb_inf, nrb_hdrs, write_err);
959 real_main(int argc, char *argv[])
961 GString *comp_info_str;
962 GString *runtime_info_str;
963 char *init_progfile_dir_error;
965 int i, j, read_err, write_err;
966 gchar *read_err_info, *write_err_info;
968 static const struct option long_options[] = {
969 {"novlan", no_argument, NULL, 0x8100},
970 {"skip-radiotap-header", no_argument, NULL, 0x8101},
971 {"seed", required_argument, NULL, 0x8102},
972 {"help", no_argument, NULL, 'h'},
973 {"version", no_argument, NULL, 'V'},
978 guint32 snaplen = 0; /* No limit */
979 chop_t chop = {0, 0, 0, 0, 0, 0}; /* No chop */
980 gboolean adjlen = FALSE;
981 wtap_dumper *pdh = NULL;
982 unsigned int count = 1;
983 unsigned int duplicate_count = 0;
987 guint32 read_count = 0;
988 guint32 split_packet_count = 0;
989 int written_count = 0;
990 char *filename = NULL;
992 guint32 secs_per_block = 0;
994 nstime_t block_start;
995 gchar *fprefix = NULL;
996 gchar *fsuffix = NULL;
997 guint32 change_offset = 0;
998 guint max_packet_number = 0;
1001 wtapng_iface_descriptions_t *idb_inf = NULL;
1002 GArray *shb_hdrs = NULL;
1003 GArray *nrb_hdrs = NULL;
1004 char *shb_user_appl;
1005 gboolean do_mutation;
1007 int ret = EXIT_SUCCESS;
1008 gboolean valid_seed = FALSE;
1009 unsigned int seed = 0;
1011 cmdarg_err_init(failure_warning_message, failure_message_cont);
1014 create_app_running_mutex();
1017 /* Get the compile-time version information string */
1018 comp_info_str = get_compiled_version_info(NULL, NULL);
1020 /* Get the run-time version information string */
1021 runtime_info_str = get_runtime_version_info(NULL);
1023 /* Add it to the information to be reported on a crash. */
1024 ws_add_crash_info("Editcap (Wireshark) %s\n"
1029 get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
1030 g_string_free(comp_info_str, TRUE);
1031 g_string_free(runtime_info_str, TRUE);
1034 * Get credential information for later use.
1036 init_process_policies();
1039 * Attempt to get the pathname of the directory containing the
1042 init_progfile_dir_error = init_progfile_dir(argv[0]);
1043 if (init_progfile_dir_error != NULL) {
1045 "editcap: Can't get pathname of directory containing the editcap program: %s.\n",
1046 init_progfile_dir_error);
1047 g_free(init_progfile_dir_error);
1050 init_report_message(failure_warning_message, failure_warning_message,
1055 /* Process the options */
1056 while ((opt = getopt_long(argc, argv, ":a:A:B:c:C:dD:E:F:hi:I:Lo:rs:S:t:T:vVw:", long_options, NULL)) != -1) {
1066 skip_radiotap = TRUE;
1072 if (sscanf(optarg, "%u", &seed) != 1) {
1073 fprintf(stderr, "editcap: \"%s\" isn't a valid seed\n\n",
1075 ret = INVALID_OPTION;
1085 gint string_start_index = 0;
1087 if ((sscanf(optarg, "%u:%n", &frame_number, &string_start_index) < 1) || (string_start_index == 0)) {
1088 fprintf(stderr, "editcap: \"%s\" isn't a valid <frame>:<comment>\n\n",
1090 ret = INVALID_OPTION;
1094 /* Lazily create the table */
1095 if (!frames_user_comments) {
1096 frames_user_comments = g_tree_new_full(framenum_compare, NULL, NULL, g_free);
1099 /* Insert this entry (framenum -> comment) */
1100 g_tree_replace(frames_user_comments, GUINT_TO_POINTER(frame_number), g_strdup(optarg+string_start_index));
1108 memset(&starttm,0,sizeof(struct tm));
1110 if (!strptime(optarg,"%Y-%m-%d %T", &starttm)) {
1111 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1113 ret = INVALID_OPTION;
1117 check_startstop = TRUE;
1118 starttm.tm_isdst = -1;
1120 starttime = mktime(&starttm);
1128 memset(&stoptm,0,sizeof(struct tm));
1130 if (!strptime(optarg,"%Y-%m-%d %T", &stoptm)) {
1131 fprintf(stderr, "editcap: \"%s\" isn't a valid time format\n\n",
1133 ret = INVALID_OPTION;
1136 check_startstop = TRUE;
1137 stoptm.tm_isdst = -1;
1138 stoptime = mktime(&stoptm);
1143 split_packet_count = get_nonzero_guint32(optarg, "packet count");
1148 int choplen = 0, chopoff = 0;
1150 switch (sscanf(optarg, "%d:%d", &chopoff, &choplen)) {
1151 case 1: /* only the chop length was specififed */
1156 case 2: /* both an offset and chop length was specified */
1160 fprintf(stderr, "editcap: \"%s\" isn't a valid chop length or offset:length\n",
1162 ret = INVALID_OPTION;
1168 chop.len_begin += choplen;
1170 chop.off_begin_pos += chopoff;
1172 chop.off_begin_neg += chopoff;
1173 } else if (choplen < 0) {
1174 chop.len_end += choplen;
1176 chop.off_end_pos += chopoff;
1178 chop.off_end_neg += chopoff;
1185 dup_detect_by_time = FALSE;
1186 dup_window = DEFAULT_DUP_DEPTH;
1191 dup_detect_by_time = FALSE;
1192 dup_window = get_guint32(optarg, "duplicate window");
1193 if (dup_window > MAX_DUP_DEPTH) {
1194 fprintf(stderr, "editcap: \"%d\" duplicate window value must be between 0 and %d inclusive.\n",
1195 dup_window, MAX_DUP_DEPTH);
1196 ret = INVALID_OPTION;
1202 err_prob = g_ascii_strtod(optarg, &p);
1203 if (p == optarg || err_prob < 0.0 || err_prob > 1.0) {
1204 fprintf(stderr, "editcap: probability \"%s\" must be between 0.0 and 1.0\n",
1206 ret = INVALID_OPTION;
1212 out_file_type_subtype = wtap_short_string_to_file_type_subtype(optarg);
1213 if (out_file_type_subtype < 0) {
1214 fprintf(stderr, "editcap: \"%s\" isn't a valid capture file type\n\n",
1216 list_capture_types(stderr);
1217 ret = INVALID_OPTION;
1223 printf("Editcap (Wireshark) %s\n"
1224 "Edit and/or translate the format of capture files.\n"
1225 "See https://www.wireshark.org for more information.\n",
1226 get_ws_vcs_version_info());
1227 print_usage(stdout);
1231 case 'i': /* break capture file based on time interval */
1232 secs_per_block = get_nonzero_guint32(optarg, "time interval");
1235 case 'I': /* ignored_bytes at the beginning of the frame for duplications removal */
1236 ignored_bytes = get_guint32(optarg, "number of bytes to ignore");
1244 change_offset = get_guint32(optarg, "change offset");
1248 keep_em = !keep_em; /* Just invert */
1252 snaplen = get_nonzero_guint32(optarg, "snapshot length");
1256 if (!set_strict_time_adj(optarg)) {
1257 ret = INVALID_OPTION;
1260 do_strict_time_adjustment = TRUE;
1264 if (!set_time_adjustment(optarg)) {
1265 ret = INVALID_OPTION;
1271 out_frame_type = wtap_short_string_to_encap(optarg);
1272 if (out_frame_type < 0) {
1273 fprintf(stderr, "editcap: \"%s\" isn't a valid encapsulation type\n\n",
1275 list_encap_types(stderr);
1276 ret = INVALID_OPTION;
1282 verbose = !verbose; /* Just invert */
1286 comp_info_str = get_compiled_version_info(NULL, NULL);
1287 runtime_info_str = get_runtime_version_info(NULL);
1288 show_version("Editcap (Wireshark)", comp_info_str, runtime_info_str);
1289 g_string_free(comp_info_str, TRUE);
1290 g_string_free(runtime_info_str, TRUE);
1296 dup_detect_by_time = TRUE;
1297 dup_window = MAX_DUP_DEPTH;
1298 if (!set_rel_time(optarg)) {
1299 ret = INVALID_OPTION;
1304 case '?': /* Bad options if GNU getopt */
1305 case ':': /* missing option argument */
1308 list_capture_types(stdout);
1311 list_encap_types(stdout);
1315 fprintf(stderr, "editcap: invalid option -- '%c'\n", optopt);
1317 fprintf(stderr, "editcap: option requires an argument -- '%c'\n", optopt);
1319 print_usage(stderr);
1320 ret = INVALID_OPTION;
1326 } /* processing commmand-line options */
1329 fprintf(stderr, "Optind = %i, argc = %i\n", optind, argc);
1332 if ((argc - optind) < 1) {
1333 print_usage(stderr);
1334 ret = INVALID_OPTION;
1339 if (err_prob >= 0.0) {
1341 seed = (unsigned int) (time(NULL) + ws_getpid());
1344 fprintf(stderr, "Using seed %u\n", seed);
1349 if (check_startstop && !stoptime) {
1352 /* XXX: will work until 2035 */
1353 memset(&stoptm,0,sizeof(struct tm));
1354 stoptm.tm_year = 135;
1355 stoptm.tm_mday = 31;
1357 stoptm.tm_isdst = -1;
1359 stoptime = mktime(&stoptm);
1362 nstime_set_unset(&block_start);
1364 if (starttime > stoptime) {
1365 fprintf(stderr, "editcap: start time is after the stop time\n");
1366 ret = INVALID_OPTION;
1370 if (split_packet_count != 0 && secs_per_block != 0) {
1371 fprintf(stderr, "editcap: can't split on both packet count and time interval\n");
1372 fprintf(stderr, "editcap: at the same time\n");
1373 ret = INVALID_OPTION;
1377 wth = wtap_open_offline(argv[optind], WTAP_TYPE_AUTO, &read_err, &read_err_info, FALSE);
1380 cfile_open_failure_message("editcap", argv[optind], read_err,
1387 fprintf(stderr, "File %s is a %s capture file.\n", argv[optind],
1388 wtap_file_type_subtype_string(wtap_file_type_subtype(wth)));
1391 if (ignored_bytes != 0 && skip_radiotap == TRUE) {
1392 fprintf(stderr, "editcap: can't skip radiotap headers and %d byte(s)\n", ignored_bytes);
1393 fprintf(stderr, "editcap: at the start of packet at the same time\n");
1394 ret = INVALID_OPTION;
1398 if (skip_radiotap == TRUE && wtap_file_encap(wth) != WTAP_ENCAP_IEEE_802_11_RADIOTAP) {
1399 fprintf(stderr, "editcap: can't skip radiotap header because input file is incorrect\n");
1400 fprintf(stderr, "editcap: expected '%s', input is '%s'\n",
1401 wtap_encap_string(WTAP_ENCAP_IEEE_802_11_RADIOTAP),
1402 wtap_encap_string(wtap_file_type_subtype(wth)));
1403 ret = INVALID_OPTION;
1407 shb_hdrs = wtap_file_get_shb_for_new_file(wth);
1408 idb_inf = wtap_file_get_idb_info(wth);
1409 nrb_hdrs = wtap_file_get_nrb_for_new_file(wth);
1412 * Now, process the rest, if any ... we only write if there is an extra
1413 * argument or so ...
1416 if ((argc - optind) >= 2) {
1417 if (out_frame_type == -2)
1418 out_frame_type = wtap_file_encap(wth);
1420 for (i = optind + 2; i < argc; i++)
1421 if (add_selection(argv[i], &max_packet_number) == FALSE)
1424 if (keep_em == FALSE)
1425 max_packet_number = G_MAXUINT;
1427 if (dup_detect || dup_detect_by_time) {
1428 for (i = 0; i < dup_window; i++) {
1429 memset(&fd_hash[i].digest, 0, 16);
1431 nstime_set_unset(&fd_hash[i].frame_time);
1435 /* Read all of the packets in turn */
1436 while (wtap_read(wth, &read_err, &read_err_info, &data_offset)) {
1437 if (max_packet_number <= read_count)
1442 rec = wtap_get_rec(wth);
1444 /* Extra actions for the first packet */
1445 if (read_count == 1) {
1446 if (split_packet_count != 0 || secs_per_block != 0) {
1447 if (!fileset_extract_prefix_suffix(argv[optind+1], &fprefix, &fsuffix)) {
1448 ret = CANT_EXTRACT_PREFIX;
1452 filename = fileset_get_filename_by_pattern(block_cnt++, rec, fprefix, fsuffix);
1454 filename = g_strdup(argv[optind+1]);
1458 /* If we don't have an application name add Editcap */
1459 if (wtap_block_get_string_option_value(g_array_index(shb_hdrs, wtap_block_t, 0), OPT_SHB_USERAPPL, &shb_user_appl) != WTAP_OPTTYPE_SUCCESS) {
1460 wtap_block_add_string_option_format(g_array_index(shb_hdrs, wtap_block_t, 0), OPT_SHB_USERAPPL, "Editcap " VERSION);
1463 pdh = editcap_dump_open(filename,
1464 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1465 shb_hdrs, idb_inf, nrb_hdrs, &write_err);
1468 cfile_dump_open_failure_message("editcap", filename,
1470 out_file_type_subtype);
1474 } /* first packet only handling */
1477 buf = wtap_get_buf_ptr(wth);
1480 * Not all packets have time stamps. Only process the time
1481 * stamp if we have one.
1483 if (rec->presence_flags & WTAP_HAS_TS) {
1484 if (nstime_is_unset(&block_start)) {
1485 block_start = rec->ts;
1487 if (secs_per_block != 0) {
1488 while (((guint32)(rec->ts.secs - block_start.secs) > secs_per_block)
1489 || ((guint32)(rec->ts.secs - block_start.secs) == secs_per_block
1490 && rec->ts.nsecs >= block_start.nsecs )) { /* time for the next file */
1492 if (!wtap_dump_close(pdh, &write_err)) {
1493 cfile_close_failure_message(filename, write_err);
1497 block_start.secs = block_start.secs + secs_per_block; /* reset for next interval */
1499 filename = fileset_get_filename_by_pattern(block_cnt++, rec, fprefix, fsuffix);
1503 fprintf(stderr, "Continuing writing in file %s\n", filename);
1505 pdh = editcap_dump_open(filename,
1506 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1507 shb_hdrs, idb_inf, nrb_hdrs, &write_err);
1510 cfile_dump_open_failure_message("editcap", filename,
1512 out_file_type_subtype);
1518 } /* time stamp handling */
1520 if (split_packet_count != 0) {
1521 /* time for the next file? */
1522 if (written_count > 0 && (written_count % split_packet_count) == 0) {
1523 if (!wtap_dump_close(pdh, &write_err)) {
1524 cfile_close_failure_message(filename, write_err);
1530 filename = fileset_get_filename_by_pattern(block_cnt++, rec, fprefix, fsuffix);
1534 fprintf(stderr, "Continuing writing in file %s\n", filename);
1536 pdh = editcap_dump_open(filename,
1537 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)) : wtap_snapshot_length(wth),
1538 shb_hdrs, idb_inf, nrb_hdrs, &write_err);
1540 cfile_dump_open_failure_message("editcap", filename,
1542 out_file_type_subtype);
1547 } /* split packet handling */
1549 if (check_startstop) {
1551 * Is the packet in the selected timeframe?
1552 * If the packet has no time stamp, the answer is "no".
1554 if (rec->presence_flags & WTAP_HAS_TS)
1555 ts_okay = (rec->ts.secs >= starttime) && (rec->ts.secs < stoptime);
1560 * No selected timeframe, so all packets are "in the
1561 * selected timeframe".
1566 if (ts_okay && ((!selected(count) && !keep_em)
1567 || (selected(count) && keep_em))) {
1569 if (verbose && !dup_detect && !dup_detect_by_time)
1570 fprintf(stderr, "Packet: %u\n", count);
1572 /* We simply write it, perhaps after truncating it; we could
1573 * do other things, like modify it. */
1575 rec = wtap_get_rec(wth);
1577 if (rec->presence_flags & WTAP_HAS_TS) {
1578 /* Do we adjust timestamps to ensure strict chronological
1580 if (do_strict_time_adjustment) {
1581 if (previous_time.secs || previous_time.nsecs) {
1582 if (!strict_time_adj.is_negative) {
1588 nstime_delta(&delta, ¤t, &previous_time);
1590 if (delta.secs < 0 || delta.nsecs < 0) {
1592 * A negative delta indicates that the current packet
1593 * has an absolute timestamp less than the previous packet
1594 * that it is being compared to. This is NOT a normal
1595 * situation since trace files usually have packets in
1596 * chronological order (oldest to newest).
1597 * Copy and change rather than modify
1600 /* fprintf(stderr, "++out of order, need to adjust this packet!\n"); */
1602 temp_rec.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1603 temp_rec.ts.nsecs = previous_time.nsecs;
1604 if (temp_rec.ts.nsecs + strict_time_adj.tv.nsecs >= ONE_BILLION) {
1607 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1609 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs;
1615 * A negative strict time adjustment is requested.
1616 * Unconditionally set each timestamp to previous
1617 * packet's timestamp plus delta.
1618 * Copy and change rather than modify returned
1622 temp_rec.ts.secs = previous_time.secs + strict_time_adj.tv.secs;
1623 temp_rec.ts.nsecs = previous_time.nsecs;
1624 if (temp_rec.ts.nsecs + strict_time_adj.tv.nsecs >= ONE_BILLION) {
1627 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs - ONE_BILLION;
1629 temp_rec.ts.nsecs += strict_time_adj.tv.nsecs;
1634 previous_time = rec->ts;
1637 if (time_adj.tv.secs != 0) {
1638 /* Copy and change rather than modify returned rec */
1640 if (time_adj.is_negative)
1641 temp_rec.ts.secs -= time_adj.tv.secs;
1643 temp_rec.ts.secs += time_adj.tv.secs;
1647 if (time_adj.tv.nsecs != 0) {
1648 /* Copy and change rather than modify returned rec */
1650 if (time_adj.is_negative) { /* subtract */
1651 if (temp_rec.ts.nsecs < time_adj.tv.nsecs) { /* borrow */
1653 temp_rec.ts.nsecs += ONE_BILLION;
1655 temp_rec.ts.nsecs -= time_adj.tv.nsecs;
1657 if (temp_rec.ts.nsecs + time_adj.tv.nsecs >= ONE_BILLION) {
1660 temp_rec.ts.nsecs += time_adj.tv.nsecs - ONE_BILLION;
1662 temp_rec.ts.nsecs += time_adj.tv.nsecs;
1667 } /* time stamp adjustment */
1669 if (rec->rec_type == REC_TYPE_PACKET) {
1671 /* Limit capture length to snaplen */
1672 if (rec->rec_header.packet_header.caplen > snaplen) {
1673 /* Copy and change rather than modify returned wtap_rec */
1675 temp_rec.rec_header.packet_header.caplen = snaplen;
1678 /* If -L, also set reported length to snaplen */
1679 if (adjlen && rec->rec_header.packet_header.len > snaplen) {
1680 /* Copy and change rather than modify returned phdr */
1682 temp_rec.rec_header.packet_header.len = snaplen;
1689 * Copy and change rather than modify returned phdr.
1692 handle_chopping(chop, &temp_rec.rec_header.packet_header,
1693 &rec->rec_header.packet_header, &buf,
1697 /* remove vlan info */
1699 /* Copy and change rather than modify returned rec */
1701 remove_vlan_info(&rec->rec_header.packet_header, buf,
1702 &temp_rec.rec_header.packet_header.caplen);
1706 /* suppress duplicates by packet window */
1708 if (is_duplicate(buf, rec->rec_header.packet_header.caplen)) {
1710 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1712 rec->rec_header.packet_header.caplen);
1713 for (i = 0; i < 16; i++)
1714 fprintf(stderr, "%02x",
1715 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1716 fprintf(stderr, "\n");
1723 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1725 rec->rec_header.packet_header.caplen);
1726 for (i = 0; i < 16; i++)
1727 fprintf(stderr, "%02x",
1728 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1729 fprintf(stderr, "\n");
1732 } /* suppression of duplicates */
1734 if (rec->presence_flags & WTAP_HAS_TS) {
1735 /* suppress duplicates by time window */
1736 if (dup_detect_by_time) {
1739 current.secs = rec->ts.secs;
1740 current.nsecs = rec->ts.nsecs;
1742 if (is_duplicate_rel_time(buf,
1743 rec->rec_header.packet_header.caplen,
1746 fprintf(stderr, "Skipped: %u, Len: %u, MD5 Hash: ",
1748 rec->rec_header.packet_header.caplen);
1749 for (i = 0; i < 16; i++)
1750 fprintf(stderr, "%02x",
1751 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1752 fprintf(stderr, "\n");
1759 fprintf(stderr, "Packet: %u, Len: %u, MD5 Hash: ",
1761 rec->rec_header.packet_header.caplen);
1762 for (i = 0; i < 16; i++)
1763 fprintf(stderr, "%02x",
1764 (unsigned char)fd_hash[cur_dup_entry].digest[i]);
1765 fprintf(stderr, "\n");
1769 } /* suppress duplicates by time window */
1772 /* Random error mutation */
1773 do_mutation = FALSE;
1775 if (err_prob > 0.0) {
1776 switch (rec->rec_type) {
1778 case REC_TYPE_PACKET:
1779 caplen = rec->rec_header.packet_header.caplen;
1783 case REC_TYPE_FT_SPECIFIC_EVENT:
1784 case REC_TYPE_FT_SPECIFIC_REPORT:
1785 caplen = rec->rec_header.ft_specific_header.record_len;
1789 case REC_TYPE_SYSCALL:
1790 caplen = rec->rec_header.syscall_header.event_filelen;
1795 if (change_offset > caplen) {
1796 fprintf(stderr, "change offset %u is longer than caplen %u in packet %u\n",
1797 change_offset, caplen, count);
1798 do_mutation = FALSE;
1803 int real_data_start = 0;
1805 /* Protect non-protocol data */
1806 switch (rec->rec_type) {
1808 case REC_TYPE_PACKET:
1809 if (wtap_file_type_subtype(wth) == WTAP_FILE_TYPE_SUBTYPE_CATAPULT_DCT2000)
1810 real_data_start = find_dct2000_real_data(buf);
1814 real_data_start += change_offset;
1816 for (i = real_data_start; i < (int) caplen; i++) {
1817 if (rand() <= err_prob * RAND_MAX) {
1818 err_type = rand() / (RAND_MAX / ERR_WT_TOTAL + 1);
1820 if (err_type < ERR_WT_BIT) {
1821 buf[i] ^= 1 << (rand() / (RAND_MAX / 8 + 1));
1822 err_type = ERR_WT_TOTAL;
1824 err_type -= ERR_WT_BYTE;
1827 if (err_type < ERR_WT_BYTE) {
1828 buf[i] = rand() / (RAND_MAX / 255 + 1);
1829 err_type = ERR_WT_TOTAL;
1831 err_type -= ERR_WT_BYTE;
1834 if (err_type < ERR_WT_ALNUM) {
1835 buf[i] = ALNUM_CHARS[rand() / (RAND_MAX / ALNUM_LEN + 1)];
1836 err_type = ERR_WT_TOTAL;
1838 err_type -= ERR_WT_ALNUM;
1841 if (err_type < ERR_WT_FMT) {
1842 if ((unsigned int)i < caplen - 2)
1843 g_strlcpy((char*) &buf[i], "%s", 2);
1844 err_type = ERR_WT_TOTAL;
1846 err_type -= ERR_WT_FMT;
1849 if (err_type < ERR_WT_AA) {
1850 for (j = i; j < (int) caplen; j++)
1856 } /* random error mutation */
1858 /* Find a packet comment we may need to write */
1859 if (frames_user_comments) {
1860 const char *comment =
1861 (const char*)g_tree_lookup(frames_user_comments, GUINT_TO_POINTER(read_count));
1862 /* XXX: What about comment changed to no comment? */
1863 if (comment != NULL) {
1864 /* Copy and change rather than modify returned rec */
1866 temp_rec.opt_comment = g_strdup(comment);
1867 temp_rec.has_comment_changed = TRUE;
1870 /* Copy and change rather than modify returned rec */
1872 temp_rec.has_comment_changed = FALSE;
1877 /* Attempt to dump out current frame to the output file */
1878 if (!wtap_dump(pdh, rec, buf, &write_err, &write_err_info)) {
1879 cfile_write_failure_message("editcap", argv[optind],
1881 write_err, write_err_info,
1883 out_file_type_subtype);
1895 if (read_err != 0) {
1896 /* Print a message noting that the read failed somewhere along the
1898 cfile_read_failure_message("editcap", argv[optind], read_err,
1903 /* No valid packages found, open the outfile so we can write an
1906 filename = g_strdup(argv[optind+1]);
1908 pdh = editcap_dump_open(filename,
1909 snaplen ? MIN(snaplen, wtap_snapshot_length(wth)): wtap_snapshot_length(wth),
1910 shb_hdrs, idb_inf, nrb_hdrs, &write_err);
1912 cfile_dump_open_failure_message("editcap", filename,
1914 out_file_type_subtype);
1920 if (!wtap_dump_close(pdh, &write_err)) {
1921 cfile_close_failure_message(filename, write_err);
1927 if (frames_user_comments) {
1928 g_tree_destroy(frames_user_comments);
1933 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate window of %i packets.\n",
1934 count - 1, plurality(count - 1, "", "s"), duplicate_count,
1935 plurality(duplicate_count, "", "s"), dup_window);
1936 } else if (dup_detect_by_time) {
1937 fprintf(stderr, "%u packet%s seen, %u packet%s skipped with duplicate time window equal to or less than %ld.%09ld seconds.\n",
1938 count - 1, plurality(count - 1, "", "s"), duplicate_count,
1939 plurality(duplicate_count, "", "s"),
1940 (long)relative_time_window.secs,
1941 (long int)relative_time_window.nsecs);
1945 wtap_block_array_free(shb_hdrs);
1946 wtap_block_array_free(nrb_hdrs);
1957 wmain(int argc, wchar_t *wc_argv[])
1961 argv = arg_list_utf_16to8(argc, wc_argv);
1962 return real_main(argc, argv);
1966 main(int argc, char *argv[])
1968 return real_main(argc, argv);
1972 /* Skip meta-information read from file to return offset of real
1975 find_dct2000_real_data(guint8 *buf)
1979 for (n = 0; buf[n] != '\0'; n++); /* Context name */
1981 n++; /* Context port number */
1982 for (; buf[n] != '\0'; n++); /* Timestamp */
1984 for (; buf[n] != '\0'; n++); /* Protocol name */
1986 for (; buf[n] != '\0'; n++); /* Variant number (as string) */
1988 for (; buf[n] != '\0'; n++); /* Outhdr (as string) */
1990 n += 2; /* Direction & encap */
1996 * We support up to 2 chopping regions in a single pass: one specified by the
1997 * positive chop length, and one by the negative chop length.
2000 handle_chopping(chop_t chop, wtap_packet_header *out_phdr,
2001 const wtap_packet_header *in_phdr, guint8 **buf,
2004 /* If we're not chopping anything from one side, then the offset for that
2005 * side is meaningless. */
2006 if (chop.len_begin == 0)
2007 chop.off_begin_pos = chop.off_begin_neg = 0;
2008 if (chop.len_end == 0)
2009 chop.off_end_pos = chop.off_end_neg = 0;
2011 if (chop.off_begin_neg < 0) {
2012 chop.off_begin_pos += in_phdr->caplen + chop.off_begin_neg;
2013 chop.off_begin_neg = 0;
2015 if (chop.off_end_pos > 0) {
2016 chop.off_end_neg += chop.off_end_pos - in_phdr->caplen;
2017 chop.off_end_pos = 0;
2020 /* If we've crossed chopping regions, swap them */
2021 if (chop.len_begin && chop.len_end) {
2022 if (chop.off_begin_pos > ((int)in_phdr->caplen + chop.off_end_neg)) {
2023 int tmp_len, tmp_off;
2025 tmp_off = in_phdr->caplen + chop.off_end_neg + chop.len_end;
2026 tmp_len = -chop.len_end;
2028 chop.off_end_neg = chop.len_begin + chop.off_begin_pos - in_phdr->caplen;
2029 chop.len_end = -chop.len_begin;
2031 chop.len_begin = tmp_len;
2032 chop.off_begin_pos = tmp_off;
2036 /* Make sure we don't chop off more than we have available */
2037 if (in_phdr->caplen < (guint32)(chop.off_begin_pos - chop.off_end_neg)) {
2041 if ((guint32)(chop.len_begin - chop.len_end) >
2042 (in_phdr->caplen - (guint32)(chop.off_begin_pos - chop.off_end_neg))) {
2043 chop.len_begin = in_phdr->caplen - (chop.off_begin_pos - chop.off_end_neg);
2047 /* Handle chopping from the beginning. Note that if a beginning offset
2048 * was specified, we need to keep that piece */
2049 if (chop.len_begin > 0) {
2050 *out_phdr = *in_phdr;
2052 if (chop.off_begin_pos > 0) {
2053 memmove(*buf + chop.off_begin_pos,
2054 *buf + chop.off_begin_pos + chop.len_begin,
2055 out_phdr->caplen - chop.len_begin);
2057 *buf += chop.len_begin;
2059 out_phdr->caplen -= chop.len_begin;
2062 if (in_phdr->len > (guint32)chop.len_begin)
2063 out_phdr->len -= chop.len_begin;
2070 /* Handle chopping from the end. Note that if an ending offset was
2071 * specified, we need to keep that piece */
2072 if (chop.len_end < 0) {
2073 *out_phdr = *in_phdr;
2075 if (chop.off_end_neg < 0) {
2076 memmove(*buf + (gint)out_phdr->caplen + (chop.len_end + chop.off_end_neg),
2077 *buf + (gint)out_phdr->caplen + chop.off_end_neg,
2080 out_phdr->caplen += chop.len_end;
2083 if (((signed int) in_phdr->len + chop.len_end) > 0)
2084 out_phdr->len += chop.len_end;
2088 /*in_phdr = out_phdr;*/
2093 * Editor modelines - http://www.wireshark.org/tools/modelines.html
2098 * indent-tabs-mode: nil
2101 * vi: set shiftwidth=4 tabstop=8 expandtab:
2102 * :indentSize=4:tabSize=8:noTabs=true: